SUPERABSORBENT RESIN AND PREPARING METHOD THEREOF

In the specification, including water-soluble ethylenically unsaturated monomer having an acid group in the monomer mixture in the at least partially neutralized crosslinked in the presence of the aqueous gel polymer forming a number internal crosslinked; drying said aqueous gel polymer, grinding and classification forming base resin powder; said base resin powder, inorganic material and surface crosslinked number created by mixing a pigment and a surface containing a number 1 forming a crosslinked layer surface; and said temporary bridge layer surface the base resin powder and adding number 2 inorganic material, the inorganic material 50 m said number 2² To 200 m/g² Having BET/g of specific surface including alumina, the method number encoded number of ari absorbent bath ball.

In the specification in addition, at least some of the water-soluble ethylenically unsaturated monomer having an acid group neutralized crosslinked polymer including base resin powder; formed on said base resin powder, number 1 crosslink layer surface containing inorganic material; and said surface crosslinked layer formed on a surface of number 2 inorganic materials, said number 2 the inorganic material 50 m² To 200 m/g² BET/g of specific surface including highly absorbent resin having alumina ball number encoded.

In the specification in addition, at least some of the water-soluble ethylenically unsaturated monomer having an acid group neutralized crosslinked polymer including base resin powder; formed on said base resin powder, number 1 crosslink layer surface containing inorganic material; and said surface crosslinked layer formed on a surface of number 2 inorganic materials, 5 to 85% to 100% of casing preventing efficiency number encoded in highly absorbent resin ball is violated.

[5 is violated]

(%)=casing preventing efficiency [W₆ (G)/W₅ (G)]* 100

In said 5 is violated,

W₅ (G) initial weight (g) and is ari absorbent, W₆ (G) after applying the temperature 40 ± 3 °C is 9 cm diameter cap reflects most light, humidity of air conditioner chamber 80 ± 3% holding in 10 minutes, 5 minutes at room temperature cooling to come in contact. Filter pay amount (g) when the highly absorbent resin when the cap dish calculator are disclosed.

Hereinafter of the invention specific embodiments of number greater than highly absorbent resin prepared by the number therefrom and method according to ari absorbent bath detailed the on-sensors other.

According to an exemplary embodiment of the invention, at least some of the water-soluble ethylenically unsaturated monomer having an acid group neutralized crosslinked monomer mixture in the presence of the aqueous gel polymer including number internal crosslinked forming; drying said aqueous gel polymer, grinding and classification forming base resin powder; said base resin powder, inorganic material and surface crosslinked number created by mixing a pigment and a surface containing a number 1 forming a crosslinked layer surface; and said surface the base resin powder and adding temporary bridge layer number 2 inorganic material, the inorganic material 50 m said number 2² To 200 m/g² Having BET/g of specific surface including alumina, the method number encoded number of ari absorbent bath ball.

The present invention the above parties number from the surface of the absorptive resin bath method, pressured liquid of equal level or more, while representing hygroscopicity, storage and 24a in a transfer process can be improved and, as a result of misfortune characteristic via maintaining pressure absorbing ability maintain rates that it is to be invention the arrears of work.

Specifically, said method embodiments of implementation in the specific number of ari absorbent used in the surface cross-linking solution bath surface crosslinked inorganic material, specifically silica or alumina to contact, surface cross-linking can be performed simultaneously with variance of the hydrophobic additive. The, bath surface crosslinked layer by minimizing the number of hydrophobic additive 24a, increase in the surface crosslinked layer dispersed state can be distributed.

In this way, a highly crosslinked surface of resin used in the surface cross-linking solution then specific inorganic substance particles, surface crosslinked with hydrophobic additive surface by introducing, simply dispersing inorganic particles on the surface of the highly absorbent resin used for cross-linking surface which is connected to an, controls the dispersion can be, ari absorbent inorganic particles which does not coupled to an upper surface extent to which conduction loss, even small content of mineral materials input, final highly absorbent resin in amount of hydrophobic additive can be height. The, packaging, storage, toward or away from the inorganic material in a transfer process to prevent separation of absorbing power can be stably implementing price prevention effect.

Herewith, said number of surface crosslinked layer in hydrophobic additive have been introduced bath method embodiments of one implementation ari absorbent base resin powder in addition to the inorganic material by adding further, solution while improving permeability can be prevent lumping between base resin powder.

I.e., the number of said ari absorbent bath in using embodiments of one implementation method, number high absorptive resin tank can be pressurized to minimize price absorbency, anti - casing (Anti-a Caking) on the upper plate, highly absorbent resin packing after storage and 24a can be reduce in vacuum. Also, repairing ability, such as rate of bioabsorption number as those occurring in the conventional silica particles added for diagnosing equivalent level ari absorbent material comprises a semi as signal peptides.

Hereinafter, more specifically described implementation according to number of ari absorbent bath method 2000.

Said at least one partial method implementation according to number tank water-soluble ethylenically unsaturated monomer having an acid group is neutralized crosslinked monomer mixture in the presence of the aqueous gel to form a polymer including number internal crosslinked the can.

Said water-soluble ethylenically unsaturated monomer include, acrylic acid, methacrylic acid, maleic anhydride, the [phwu end it buys, compress [...], itaconic, 2 - acrylic with the ethane which rises sulfonic acid, 2 - meta the [khu the ethane alcoholic beverage phone which rises with the reel it buys, 2 - (meth) acrylic with the pro petal alcoholic beverage phone which rises it buys, or 2 - (meth) acrylamide - 2 - methylpropanesulfonic acid anionic-polymerizable monomer salt thereof; (meth) acrylamide, (meth) N - substituted acrylamide, 2 - hydroxyethyl (meth) acrylate, 2 - hydroxypropyl (meth) acrylate, maul [thok hour polyethylene glycol (meth) acrylate or polyethylene glycol (meth) acrylates nonionic hydrophilic-containing monomer; and dimethyl aminoethyl (meth) acrylate or (N, N) - (N, N) - dimethylamino-propyl (meth) amino group-containing unsaturated monomer and 4 of class freight of acrylamide; using at least one selected from the group consisting 1 can be made. Even double, acrylic acid or salt thereof, e.g., at least a part of acrylic acid neutralized acrylic acid and/or can be an alkali metal salt such as sodium salt, nickel oxide or number of highly absorbent resin having such monomers attached thereto to the relationship. Said acrylic-based monomer and an alkali metal is used, such as caustic soda (NaOH) acrylic acid can be followed by using basic compound. The, said about 70 to 85% to 95% water-soluble ethylenically unsaturated monomer or can be adjusted to a degree of neutralization of about 50, a neutralizing this range effect can be highly resin excellent in precipitation number [...] repair capacity.

Said water-soluble ethylenically unsaturated monomer including monomer mixtures, said concentration of water-soluble ethylenically unsaturated monomer, about 20 to about 60 total monomer mixture including carry each raw material and a solvent weight %, or about 40 to about 50% by weight can be to, polymerization time and reaction conditions appropriate polarity can be concentrations. But, the concentration of the monomer number at both ends of the low yield of highly absorbent resin that is too low can be frost door number diameter, a portion of the precipitation or vice versa too concentration becomes high monomer polymerized aqueous gel polymer of coffee components while efficiency is low such as at both ends of the door appears to be filled with a number can be selected from the group consisting of ari absorbent can be.

Said base resin powder for introducing internal crosslinking number include basic crosslinked structure, number of existing ari absorbent from the upper bath using a crosslinked coating composition can be a number internal crosslinked stores all without number. Only, suitable for the introduction of a highly absorbent resin than said base resin powder in order to improve the physical properties of a crosslinked structure, a plurality of ethylene oxide with polyfunctional acrylate compound internal crosslinking number can be used. More specific examples of such internal crosslinking number, (PEGDA) polyethylene glycol methacrylate, isobornyl methacrylate glycerin, glycerin triazole dimethylaminoethyl methacrylate, dimethylaminoethyl methacrylate (Ethoxylated provided TMPTA) unmodified or ethoxylated trimethylolpropane triazole, d the d arc relay [thu which comes hexane, and at least one selected from the group consisting of isobornyl methacrylate TEG 1 is cited. The internal crosslinking number said monomer mixture is about 0. 01 to about 0. 5% by weight concentration of included, polymerized polymer can be cross-linked disclosed.

In addition, the number of said ari absorbent polymer monomer mixture further comprises the upper disclosure number can be generally of the bath.

Specifically, the polymerization method according to said disclosure number disclosure number or UV irradiation polymerization using photopolymerization can be disclosure number according to a pressure of 20 MPa. But, even by photopolymerization method, such as by the irradiation of the ultraviolet irradiation amount of heat occurs and, in addition polymerization reaction depending on the progress of exothermic reaction as the degree of heat which, additionally make sum include disclosure number may be filled.

Preferably said ultraviolet light such as compounds capable of forming a radical by the disclosure number is determined as a configuration can be used without limiting. Preferably said disclosure number include e.g., for the preparation of an ether (benzoin ether), d alkyl oh three toe lung rice field (dialkyl acetophenone), hydroxyl alkyl ketene (hydroxyl alkylketone), writing jade thread [ley [thu (phenyl glyoxylate) phenyl, benzyl d methyl [khey mask (Benzyl Dimethyl Ketal), the gun spin which it will know (acyl phosphine) and alpha - (α-a aminoketone) one or more than one selected from the group consisting amino ketone can be. On the other hand, the gun spin which it will know in one embodiment, the transmission lucirin TPO, i.e., 2, 4, 6 - trimethyl - benzoyl - trimethyl phosphine oxides (2, 4, 6 a-trimethyl-a benzoyl-a trimethyl phosphine oxide) or IRGACURE 819, i.e. bis (2, 4, 6 - trimethyl - benzoyl) - (Bis (2, 4, 6 a-trimethylbenzoyl) - phenylphosphineoxide) phenyl phosphine oxides can be used.

Reinhold Schwalm is subjected to various optical disclosure number LU xun "UV Coatings: Basics, Recent Developments and New Application (Elsevier 2007 years)" which p115 specified well, not limited to the above example.

Preferably said disclosure number said monomer mixture is about 0. 01 to about 1. 0% by weight concentration of can be included. When photopolymerization disclosure number such that the slower speed can be too low concentration of polymer, the molecular weight of the small concentration of photopolymerization disclosure number too is higher ari absorbent can be becomes irregular properties.

In addition, a pressure of 20 MPa disclosure number include said disclosure number with sulfuric acid salt orgin, azo-based disclosure number, selected from the group consisting of hydrogen peroxide and ascorbic acid disclosure number can be one or more than one. Specifically, examples of disclosure number with sulfuric acid salt orgin with sulfuric acid natrium (Sodium persulfate; Na₂ S₂ O₈ ), [...] (Potassium persulfate; K₂ S₂ O₈ ), With sulfuric acid ammonium (Ammonium persulfate; (NH₄ )₂ S₂ O₈ ) And the like, examples of 2, 2 - azo bis - azo (Azo) based disclosure number (2 - amidino propane) this hydrochloric acid salt (2, 2 a-azobis (2 a-amidinopropane) dihydrochloride), 2, 2 - azo bis - (N, N - dimethyl alkylene) [...] mote lama [tin dihydrochloride (2, 2 a-azobis - (N, N-a dimethylene) isobutyramidine dihydrochloride), methacrylonitrile isobutyrate (cover certain day oh trillion) 2 - (2 - (carbamoylazo) isobutylonitril), 2, 2 - azo bis [2 - (2 - imidazolin - 2 - yl) propane] dihydrochloride ([2 - (2 a-imidazolin-a 2 a-yl) propane] dihydrochloride 2, 2 a-azobis), 4, 4 - azo bis - (4 - cyano roh ballet [lik acid) (4, 4 a-azobis - (4 a-cyanovaleric acid)) etc..

LU xun Odian is subjected to various make sum disclosure number 'Principle of Polymerization (Wiley, 1981)', which p203 specified well, not limited to the above example.

Said monomer mixture comprises about 0 sum make said disclosure number. 001 to about 0. 5% by weight concentration of can be included. These thermal polymerization disclosure number too low concentration of scarcely any additional disclosure number and an additional make shot areas can be inverted triangular screw according to a pressure of 20 MPa, the concentration of the low molecular weight is not generated disclosure number too is higher ari absorbent can be physical property becomes irregular.

Further, said monomer mixture can have a more number (thickener), plasticizer number, positive number, anti-oxidation number, number further includes a number of surface-active agents can be added. Said number additive is added files using a number grudge without addition number widely in ari absorbent field can be.

On the other hand, the aforementioned water-soluble ethylenically unsaturated monomer, preferably disclosure number, make sum disclosure number, internal crosslinked and addition number number such as solvent dissolved form in the source material can be prepared.

At this time using said solvent can be used without the aforementioned components when the configuration capable of limiting can be, e.g. water, ethanol, ethylene glycol, percutaneous, TEG, 1, 4 - butanediol, propylene glycol, ethylene glycol monobutyl ether, propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, methyl ethyl ketone, acetone, methyl oh wheat ketone, cyclohexanone, cyclo pentanone, [...], d ethylene glycol ethyl ether, toluene, xylene, butyl with [lak ton, carboxylic expense [thol, it will count with the brush [pu acetate and methyl N, N - dimethylacetamide in NaCl 1 can be used in combination at least one.

Said solvent total content of a monomer mixture comprising remaining number [...] enhancer is disclosed components can be.

On the other hand, the monomer compositions make sum or by polymerizing the polymerizable aqueous gel polymer commonly used polymerization method forming method in addition back, particularly limiting free configuration.

Specifically for example, polymerization of said monomer composition method according can be divided into energy greatly make sum and photo-polymerization. Typically make poor advances, a flow within a reactor having a driving motor is such as to promote [ni compared to (kneader) can be. While, photopolymerization advances, but movable belt travel within a reactor, the above-mentioned polymerization method is one example, the present invention refers to polymer not limited to above-mentioned method.

And, said 40 °C to 90 °C the volatile organic solvent is adjusted to about polymerization temperatures of a monomer mixture for vaporizing and has an improved aqueous gel polymer can be efficiently induce polymerization.

The, range of polymerization temperatures in order to achieve the above-mentioned means are specially not limited. Either supply a heat medium, can be heated for direct supply of heat. Available of the heat medium types include steam, hot air, hot oil at an elevated temperature such as but one fluid regions, which are not limited to the, temperature of the heat medium supplied in addition means of the heat medium, and heating temperature can be appropriately selected in consideration of the speed target temperature. On the other hand, thermal source by an it directly onto the heating, gas heating method is cited but through, and not limited to the above example.

In addition, polymerization time is 30 seconds to 10 monomeric mixtures comprising said active ingredient to form a polymer aqueous gel having adjusted pore structure can be optimized.

In one example, as described above with a driving motor (kneader) [ni compared to such as reactor, or the reactor is heated to make poor to operated in a reactor according to the type of the driving motor having obtained aqueous gel polymer, reactor outlet gas discharged into the aqueous gel polymer number centimeter to several millimeters may be in the form disclosed. Specifically, the size of the obtained aqueous gel polymer injected and injection speed according to the concentration of various monomer compositions can be appears, typically about 2 to 50 mm in aqueous gel polymer weight average diameter can be obtained.

In addition, as above-mentioned conveyor belt movable in a reactor with photopolymerization advances, conventional belt is obtained aqueous gel polymer can be in the form of seat having the width on aqueous gel polymer. At this time, the implanted polymer thickness of the sheeting and injection speed or depending on concentration of monomer compositions, typically from about 0. 5 polymer sheet having a thickness of from about 5 cm to monomer compositions obtained on supply preferably. Sheet thickness of polymer on a jacket too thin to supply monomer compositions, low production efficiency does not preferably, sheet thickness is exceeded due to too large thickness is 5 cm on polymer, polymerization reaction is uniformly throughout the thickness does not occur at the...copyright.

Wherein method such as about 40 to about 80 weight obtained aqueous gel polymer normal implementation being % moisture content. On the other hand, the specification "moisture content" total aqueous gel polymer occupies the entire moisture content aqueous gel polymer weight relative to the weight when the weight of the polymer by big value is subtracted. Specifically, polymers by means of infrared heating temperature of dried weight of polymers in the process according to the calculated value measures condensed phosphate defined as follows. The, drying conditions have proved apparatus for increasing temperature until after about 180 180 in total drying time of 5 to 20 minutes for carrying out heating step manner as to retain the component sets, function under the substrate.

And, after said monomer is crosslinked, drying, grinding and classification process is performed such as base resin powder which can be obtained, such as through the process of such grinding and classification, about 150 to 850 miscibility with the base resin powder and the resulting number-average suitable for the number bath and having diameters of m to micro ball. More specifically, at least about 95% or more by weight of said base resin powder and obtained therefrom about 150 to 850 m ari absorbent has micro diameter, less than about 3% by weight having a particle size less than about 150 micro m fine powder can be.

the base resin powder and highly absorbent resin particle size distribution is regulated in the range are desirable to prevent, final number can exhibit superior properties as a result of misfortune characteristic described above is already highly absorbent resin produced therewith.

On the other hand, said drying, grinding and classification method progression of greater than specifically described as follows.

First, in drying the hydrogel polymer, in order to enhance the efficiency of said drying steps necessary to coarse fraction in the slurry before drying can be via chain.

, the cannot be used mill that includes a configuration definition of, specifically, vertical cutter (Vertical pulverizer), turbo cutter (Turbo cutter), turbo writing line compared to (Turbo grinder), rotary cutting type crusher (Rotary cutter mill), cutting type crusher (Cutter mill), disk crusher (Disc mill), pieces crusher (Shred crusher), crusher (Crusher), chopper (chopper) and circular plate type cutter (Disc cutter) any one selected from the group consisting of crushing device but, more limited example above.

About 2 mm to about 10 mm so that the diameter of the step aqueous gel polymer chain anticancer activity can be grinding.

The aqueous gel polymer content less than 2 mm particle diameter as milling does not technically for high due to hereinafter, grinding particles agglomerated in addition other user to 2.0 may be filled. On the other hand, when the particle diameter exceeds 10 mm drying, drying steps increase the efficiency of inverted triangular screw can be made later.

Said anticancer activity such as chain or, or coarse fraction followed by drying the polymer chain polymers are aqueous gel immediately after a plurality of hierarchies. The drying temperature of about 50 °C to about 250 °C said drying steps implementation being. Less than about 50 °C when drying temperature, drying time is too long and the carrier is then the group and forming a high absorptive resin can be turned into high, about 250 °C drying temperature is exceeded, only dried too polymer surface, comprising differential occurs later grinding process may be, final forming a high absorptive resin selected from the group consisting equipment disclosed. More preferably said drying at a temperature of about 150 °C to about 200 °C, more preferably at a temperature of about 160 °C to about 190 °C can be performed.

On the other hand, in the case of drying time to process efficiencies, about 20 minutes to about 15 hours progress but, not limited to.

Said method for drying in a drying step for drying process also aqueous gel polymer commonly used for example, without limiting selected configuration can be used. Specifically, the hot wind supplying, infrared irradiation, microwave irradiation, or irradiation of ultraviolet method such as drying step can be performed. The amount of polymer in a drying step progress of about 0. 05 to about 10% by weight implementation being.

Then, the obtained dry polymer drying steps on which a plurality of hierarchies.

Particle diameter of about 150 to about 850 m polymer powder obtained after grinding step micro implementation being. The particle diameter for ground into a used crusher specifically, ball mill (ball mill), pin mill (pin mill), hammer mill (hammer mill), screw mill (screw mill), roll mill (roll mill), disk mill (disc mill) or jog mill (jog mill) but use, and not limited to the aforementioned example.

And, the final number for managing the physical properties of a powder after grinding width to gel, polymer powder particle diameter obtained after grinding according to a classification can be a separate process. Preferably about 150 to about 850 m for classifying a polymer to a micro particle diameter, such a particle diameter polymer powder and subjected to a cross-reactive surface only be number width it will do.

On the other hand, base resin powder is formed on the above-mentioned after, said manufacturing method embodiments of one implementation the ari absorbent said base resin powder, by mixing a pigment and a surface containing a number number 1 inorganic material and surface cross-linking the surface crosslinked layer can be formed.

As a result of misfortune result ari absorbent rate of bioabsorption of said number 1 the inorganic material can be introduced during the process of entrainer to enhance surface cross-linking. Said crosslinked layer is formed according to number bath method implementation in surface surface crosslinked inorganic material dispersing solution number 1, number 1 simultaneously with surface crosslinked by introducing inorganic surface quality, highly absorbent resin from being separated from inorganic material can be prevented effectively. The, method according to number in one implementation as a result of misfortune characteristic even by very small quantities of inorganic material in said tank for synchronous absorption and acquisition rate effect can be sufficiently expressed.

Specifically, said surface crosslinked part with a base resin powder be number 1 the inorganic material make contact with a surface. I.e., according to manufacturing method implementation in said, base resin powder surface on the temporary bridge layer formed on the surface crosslinked liquid introduced into the ultrasonic vibrator in number 1 inorganic material dispersed state, even surface crosslinked layer number 1 inorganic material can be present in a dispersed state. The, surface crosslinked layer formed on a surface of base resin powder distributed throughout said number 1 the inorganic material present as a base resin powder surface can be contacted.

While, for example, base resin powder surface crosslinked layer after the first photoresist pattern, surface crosslinked layer is inorganic material for its fixing to the surface again while crosslinking number 1, number 1 included in temporary bridge layer surface inorganic material and the base resin powder contact with the surface produced, inorganic material added to the base resin powder as a result of misfortune characteristic part in place in the light source and not a crosslinked structure can be difficult to secure sufficient, increases in thickness in a temporary bridge layer surface by, in addition ari absorbent particle diameter of the particles can be increased.

In forming said surface crosslinked layer, base resin powder 100 parts by weight of inorganic content number 1 0. 001 parts by weight to 1 parts by weight, or 0. 005 parts by weight to 0. 5 implementation being parts by weight. In this way a small amount of inorganic material number bath by adding a quantity of inorganic material selected from a high absorptive resin absorption rate as a result of misfortune characteristic and absorbing rate can exhibit excellent without pressure.

Together with inorganic material on a surface in said pigment and a surface crosslinked number number 1 respectively can be present in a dispersed state, the, dispersed inorganic material can exhibit the above number 1 weight ratio. Said base resin powder is remarkably increased compared to inorganic content number 1 when too large, heavy and difficult to smoothly cross-linking surface inorganic material number 1, portion outputs a full absorbing ability thereof can.

In addition, base resin powder as compared to inorganic content reduces the rate if said number 1, number 1 in solution with an inorganic material permeable, absorption rates compared the actual condition uniting effect thereof can hardly billion number sufficiently implemented.

For example inorganic said number 1 which are not significantly limited, e.g., silica (silica), clay (clay), alumina, silica - alumina composite, titania, zinc oxide and aluminum at opinion pay [thu 1 can be at least one selected from the group consisting of using. This number 1 the inorganic material can be used in the form in powder form or liquid, in particular silica powder, alumina powder, silica - alumina powder, titania powder, nano silica solution, can be used as a mixture of 2 or more.

More specifically, examples include the inorganic silica (silica) or alumina and said number 1, said silica or alumina surface that may have charges. The, said silica or alumina is positive (positive charge) since surface may have, said silica or alumina surface crosslinked layer base resin powder or end number introduced between a high absorptive resin tank 24a...copyright 2001.

In addition, particle diameter of 1 nm to 100 nm said alumina layer implementation being. I.e., prevent a ball of said surface pigment and colloidal solution, silica or alumina particles in solution such as these are stably without aggregating the particles can be dispersed by the repel each other.

In addition, the 50 m said alumina² To 200 m/g² BET/g of specific surface may have. The, said silica or alumina surface crosslinked layer when introduced, the absorptive resin absorbent speed can be improved and as a result of misfortune result, hygroscopicity compared to almost equivalent level or more can be introduced prior to the second step.

Said surface pigment and water, ethanol, ethylene glycol, percutaneous, TEG, 1, 4 - butanediol, propylene glycol, ethylene glycol monobutyl ether, propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, methyl ethyl ketone, acetone, methyl oh wheat ketone, cyclohexanone, cyclo pentanone, [...], d ethylene glycol ethyl ether, toluene, xylene, butyl with [lak ton, carboxylic expense [thol, it will count with the brush [pu acetate and methyl N, N - 1 further comprises at least one solvent selected from the group consisting of dimethylacetamide can be.

In addition, said surface cross-linking step, with said inorganic material, multivalent metal cation crosslinked by the addition of a surface can be performed. The, highly absorbent surface of resin can be more optimizing a crosslinked structure. This carboxyl group (COOH) on said metal cation the absorptive resin can be crosslinked by forming the second electrode distance are expected to chelate.

Said surface crosslinked layer from the upper surface of the bath are made from a number of existing ari absorbent crosslinked number can. The present invention stores a number known to the field number is provided as said surface crosslinked to be without cooling. Example of more particularly, ethylene glycol, propylene glycol, 1, 4 - butanediol, 1, 6 - hexanediol, 1, 2 - hexanediol, 1, 3 - hexanediol, 2 - methyl - 1, 3 - propanediol, 2, 5 - hexanediol, 2 - methyl - 1, 3 - pentanediol, 2 - methyl - 2, 4 - pentanediol, tree propylene glycol and glycerol such as polyol; or ethylene carbonate and propylene carbonate such as carbonate-based compound; d writing city [til it sprouts and or polyethylene glycol such as epoxy compounds and the like is cited. This surface crosslinked number comprises a base resin powder 100 parts by weight of about 0. 01 to 4 parts by weight of a content can be used.

On the other hand, in the step forming said surface crosslinked layer, can be more in number further comprises pigment and a surface. The number base resin in the presence of more powder can be further crosslinked lower minimizes properties even after grinding.

More specifically, a selected one of the at least one hydroxy-containing polymer include polysaccharide and thickening said number 1 can be used.

In one of, said polysaccharide include gum sequence number is used as the cellulose-based on more thickening number can be. Said gum sequence number more specific examples, xanthan gum (xanthan gum), your big gum (arabic gum), hydrocolloids must gum (karaya gum), [...] gum (tragacanth gum), mote gum (ghatti gum), guar gum (guar gum), locust bean gum (locust bean gum) and silo bud (psyllium seed gum) cited such as seed gum, said cellulose-based thickening number particular examples, hydroxypropyl methylcellulose, carboxymethylcellulose, methylcellulose, hydroxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxyethyl methyl cellulose, hydroxy methyl propyl cellulose, hydroxyethyl hydroxypropyl cellulose, ethyl hydroxyethyl cellulose and methyl hydroxypropyl cellulose and the like is cited. On the other hand, polyethylene glycol and polyvinyl alcohol said hydroxy-containing polymer of the specific example is cited.

Said surface crosslinked number base resin powder may be heated at about 100 °C added the surface cross-linking reaction can be made. In particular, good miscibility with the resin for neck number number semi high pressure liquid coolant, said surface cross-linking process conditions maximum reaction temperature about 100 °C or more, or about 120 °C to 200 °C, about 20 min or maximum reaction temperature holding time, or about 20 min or higher can be about 1 time hereinafter. In addition, a cooling initial reaction disclosure, for example are determined, about 100 °C or more, or about 120 °C to 200 °C temperature, said temperature about 10 min or higher reaction temperature up to a maximum time, or can be about 10 to 1 minute or more time hereinafter [...] number, the aforementioned surface crosslinked by number of process conditions met good miscibility with the resin bath can be negative number semi neck were identified.

For elevated means are specially not limited to cross-reactive surface. Either supply a heat medium, can be heated for direct supply of heat. The, kind of the heat medium available include steam, hot air, hot oil at an elevated temperature such as but one fluid regions, which are not limited to the, temperature of the heat medium supplied in addition means of the heat medium, and heating temperature can be appropriately selected in consideration of the speed target temperature. On the other hand, thermal source by an it directly onto the heating, gas heating method is cited but through, and not limited to the above example.

On the other hand, one end of the above-mentioned surface cross-linking process, said temporary bridge layer surface the base resin powder comprising adding inorganic material can be number 2.

Said surface formed highly absorbent resin powder and aluminum oxide inorganic material to form temporary bridge layer number 2, number 2 on said temporary bridge layer surface can be further dispersed inorganic material, permeable sidewalls [...] pressurized high absorptive resin improved final number bath solution, the number of can be the actual condition uniting billion effect is effectively implemented.

Said number 1 and number 2 the inorganic material has been added to the crosslinked surface inorganic material surfaces temporary bridge layer is formed of an inorganic material added after formation temporary bridge layer inorganic substance and surface defined, specific component be the same or different each other.

Adding inorganic material in said number 2, number 2 0 100 parts by weight of a base resin powder inorganic content. 001 parts by weight to 1 parts by weight, or 0. 005 parts by weight to 0. 5 parts by weight, or 0. 01 to 0 parts by weight. 2 implementation being parts by weight. Said base resin powder is remarkably increased compared to number 2 rate when inorganic content, number 2 inorganic material loss rate is increased and the ions are not introduced surface of base resin, supports can be reduced, a high absorptive resin bath consisting of final number can be reduced. Said base resin powder as compared to inorganic content if rate reduces the number 2, number 2 is the actual condition uniting billion compared by inorganic material number thereof can hardly [...] pressurized sufficiently implemented.

Specifically, said number 2 inorganic substance for example, silica (silica), clay (clay), alumina, silica - alumina composite, titania, zinc oxide and aluminum at opinion pay [thu 1 can be at least one selected from the group consisting of using. This number 2 the inorganic material can be used in the form in powder form or liquid, in particular silica powder, alumina powder, silica - alumina powder, titania powder, nano silica solution, can be used as a mixture of 2 or more.

More specifically, examples include inorganic alumina and said number 2, said alumina surface that may have charges. In this way, since said alumina is positively (positive charge) may have a surface, said surface crosslinked layer base resin powder or end number bath alumina introduced between a high absorptive resin 24a...copyright 2001.

In addition, particle diameter of 1 nm to 100 nm said alumina layer implementation being. In addition, the 50 m said alumina² To 200 m/g² BET/g of specific surface may have. The, alumina crosslink layer when introduced on said surface, the absorptive resin absorbent speed can be improved and as a result of misfortune result, hygroscopicity compared to almost equivalent level or more can be introduced prior to the second step.

On the other hand, 100 parts by weight of said number 2 1 parts by weight of said number 1 to 2000 parts by weight of inorganic material inorganic content, or 1500 parts by weight to 10 parts by weight, or 1 to 500 parts by weight parts by weight, hereinafter 500 parts by weight or exceeds 2000 parts by weight, or 10 parts by weight to 200 parts by weight, or to be a 1500 parts by weight of 700 parts by weight.

Each said number 1 and number 2 the inorganic material is added to the inorganic material, inorganic material in both the number 1 and number 2 or remove the inorganic material, inorganic material added only one number 1 or number 2 inorganic material not to induce, secure a final number tank pressurized high absorptive resin absorbing power, which can be implemented is improved solution permeable 24a billion number.

When said number 1 number 2 is remarkably increased rate relative to inorganic inorganic content, number 2 inorganic material loss rate is increased and the ions are not introduced surface of base resin, supports can be reduced, a high absorptive resin bath consisting of final number can be reduced. If too large relative to inorganic content reduces the number 2 inorganic said number 1, number 2 is the actual condition uniting billion compared by inorganic material number thereof can hardly [...] pressurized sufficiently implemented.

In addition, characteristics of said inorganic material number 1 and number 2 ari absorbent is a power ratio s402. inorganic content. Specific example, high pressure liquid coolant to said highly absorbent resin reinforcement neck when anti-lumping characteristic number, said number 1 number 2 500 parts by weight of 100 parts by weight of inorganic content exceeds 2000 parts by weight of inorganic material hereinafter, or 700 to 1500 parts by weight parts by weight, or be a 900 to 1300 parts by weight parts by weight.

And, the permeability of said highly absorbent resin solution is reinforced when high pressure liquid coolant number, said number 1 number 2 parts by weight to 500 parts by weight of 100 parts by weight of inorganic material 1 inorganic content, or 10 parts by weight to 200 parts by weight, or 20 parts by weight to 100 parts by weight of be a.

Adding said number 2 inorganic material to a surface crosslinked layer base resin powder subjected to the free configuration definition of the method. For example, inorganic material and the base resin powder mixing or into and out of the bath, an inorganic material powder base resin includes an method, continuously operated base resin powder and inorganic material providing a continuous supply of mixing in a mixer method can be use.

Said number 2 upon addition of inorganic substance, by adding further water and can be mixed together. Adding water and when, inorganic material can be dispersed in the base resin powder trigger copyright 2001.

In addition, one end of the above-mentioned surface cross-linking process, further comprises a surface cross-linked ari absorbent can be crushed by step.

The specification terms in terms' grinding 'sense' crushing ' is the same are used.

Said highly absorbent resin for crushing or grinding device for the aforementioned aqueous gel polymer chain well dried aqueous gel polymer can be performed using for grinding mill or the like. The particle size is about 150 to about 850 m miscibility with the resin powder obtained in crushing micro implementation being. In addition, the highly absorbing resin further classifying said desired crushed ari absorbent particle diameter can be achieved.

On the other hand, according to another embodiment of the invention, at least some of the water-soluble ethylenically unsaturated monomer having an acid group neutralized crosslinked polymer including base resin powder; formed on said base resin powder, number 1 crosslink layer surface containing inorganic material; and said surface crosslinked layer formed on a surface of number 2 inorganic materials, said number 2 the inorganic material 50 m² To 200 m/g² BET/g of specific surface including highly absorbent resin having alumina ball number can be disclosed.

Said highly absorbent resin can be obtained by said method embodiments of one implementation ari absorbent bath number. Said ethylenically unsaturated monomer, base resin powder, surface crosslinked layer, said inorganic material number 1 and number 2 the present invention relates to implementation of an intervening comprising the inorganic material content.

In particular, said number 1 said number 2 to 2000 parts by weight of 100 parts by weight of inorganic material 1 parts by weight of inorganic content, or 1500 parts by weight to 10 parts by weight, or 1 to 500 parts by weight parts by weight, hereinafter 500 parts by weight or exceeds 2000 parts by weight, or 10 parts by weight to 200 parts by weight, or to be a 1500 parts by weight of 700 parts by weight.

Each said number 1 and number 2 the inorganic material is added to the inorganic material, inorganic material in both the number 1 and number 2 or remove the inorganic material, inorganic material added only one number 1 or number 2 inorganic material not to induce, secure a final number tank pressurized high absorptive resin absorbing power, which number 24a billion, solution permeability can be improved to the user.

When said number 1 number 2 is remarkably increased rate relative to inorganic inorganic content, number 2 inorganic material loss rate is increased and the ions are not introduced surface of base resin, supports can be reduced, a high absorptive resin bath consisting of final number can be reduced. If too large relative to inorganic content reduces the number 2 inorganic said number 1, number 2 is the actual condition uniting billion compared by inorganic material number thereof can hardly [...] pressurized sufficiently implemented.

In addition, said surface crosslinked part with a base resin powder be number 1 the inorganic material make contact with a surface. Increase in the surface crosslinked layer because it stands from me number 1 the inorganic material may be present dispersed state, surface crosslinked layer formed on a surface of base resin powder distributed throughout said number 1 the inorganic material present as a base resin powder surface can be contacted.

Inorganic material or inorganic material are identical to each other or different from said number 1 and number 2 hereinafter, independently silica (silica), clay (clay), alumina, silica - alumina composite, titania, zinc oxide and aluminum at opinion pay [thu 1 can be selected from the group consisting of at least one element.

More specifically, examples include the inorganic silica (silica) or alumina and said number 1, said silica or alumina surface that may have charges. The, said silica or alumina is positive (positive charge) since surface may have, said silica or alumina surface crosslinked layer base resin powder or end number introduced between a high absorptive resin tank 24a...copyright 2001.

In addition, examples include inorganic alumina and said number 2, said alumina surface that may have charges. In this way, because said surface may have positive (positive charge) in alumina, alumina surface crosslinked layer base resin powder or end number said introduced between a high absorptive resin tank 24a...copyright 2001.

In addition, particle diameter of 1 nm to 100 nm said alumina layer implementation being. In addition, the 50 m said alumina² To 200 m/g² BET/g of specific surface may have. The, surface crosslinked layer or said surface crosslinked layer outside said silica or alumina when introduced, the absorptive resin absorbent speed can be improved and as a result of misfortune result, hygroscopicity compared to almost equivalent level or more can be introduced prior to the second step.

This highly absorbent resin represented 1 of 0 is violated. 7 psi pressing absorbency reduction measured at -20% to 0%, or -15% to implementation being 0%.

[1 is violated]

0. 7 psi (%)* 100={(A1 - A0)/A0} of a pressurized-water absorbency reduction

In said 1 is violated,

A0 is number 1 and number 2 do not contain inorganic material in an amount of inorganic material is violated and pressurized absorbency value calculated by ari absorbent 2, A1 is number 1 and number 2 inorganic material including highly absorbent acrylic resin in an amount of inorganic material 2 is violated and pressurized absorbency value is calculated by,

[2 is violated]

0. 7 psi (g/g) of AUL=[W₂ (G)- W₁ (G)]/ W₀ (G)

In said 2 is violated,

W₀ (G) initial weight (g) and is ari absorbent, W₁ (G) said absorptive resin is weight and the total weight of the device and ari absorbent can impart thereto, W₂ (G) includes a load (0. 7 psi) 1 time after said resin to a highly saline absorption, highly absorbent resin of said weight and the total of the weight device ari absorbent can impart thereto are disclosed.

The, said highly absorbent resin of said 1 0 is violated. 7 psi pressing absorbency reduction measured at -20% to 0% to very small, as a result of misfortune characteristic can be reduced maintaining conglomerating.

In addition, said another embodiments of highly absorbent resin has a good basic implementation semi absorbent number can exhibit performance. More specifically, said highly absorbent resin is obtained after the following characteristics for evaluating performance semi absorbent basic number can exhibit. I.e., a centrifuge is employed for repairing said highly absorbent resin physiological saline solution (CRC) 33 to 35 g/g and, for physiological saline solution 0. 7 psi of a pressurized-water absorbency (AUL) is 14 to 16 g/g and, 0. 9% by weight NaCl solution 50 ml of 600 rpm agitation at the time of generating a rate at both ends 25 seconds to 35 seconds time industry a number, or 28 seconds to 32 and candle, 90% to 100% efficiency in preventing casing can exhibit properties.

Said 0. 7 psi the EDANA WSP 242 of a pressurized-water absorbency (AUL) method. 2 can be measured according to method of. More specifically, at the side of a highly absorbent resin about 0 1 said pressure absorption over time. 7 psi after saline to absorb in the pressing, is violated 2 can be calculated according to:

[2 is violated]

0. 7 psi (g/g) of AUL=[W₂ (G)- W₁ (G)]/ W₀ (G)

In said 2 is violated,

W₀ (G) initial weight (g) and is ari absorbent, W₁ (G) said absorptive resin is weight and the total weight of the device and ari absorbent can impart thereto, W₂ (G) includes a load (0. 7 psi) 1 time after said resin to a highly saline absorption, highly absorbent resin of said weight and the total of the weight device ari absorbent can impart thereto are disclosed.

In addition, calculated by said calculating the mdct 5 in casing preventing efficiency can be as follows:

[5 is violated]

(%)=casing preventing efficiency [W₆ (G)/W₅ (G)]* 100

In said 5 is violated,

W₅ (G) initial weight (g) and is ari absorbent, W₆ (G) after applying the temperature 40 ± 3 °C is 9 cm diameter cap reflects most light, humidity of air conditioner chamber 80 ± 3% holding in 10 minutes, 5 minutes at room temperature cooling to come in contact. Filter pay amount (g) when the highly absorbent resin when the cap dish calculator are disclosed.

In addition, in a centrifuge (CRC) method is employed for repairing said saline to EDANA WSP 241. 2 can be measured according to method of. More specifically, over 30 minutes after saline to absorb said repair at the side of a highly absorbent resin, the following is violated 7 can be calculated by:

[7 is violated]

CRC (g/g)={[W₈ (G)- W₇ (G)]/ W₀ (G)} - 1

In said 7 is violated,

W₀ (G) initial weight (g) and is absorptive resin,

W₇ (G) without using a highly resin is, after 3 minutes to dehydrated liquor using lever 250G measuring weight of (Tea bag) and,

W₈ (G) at room temperature is 0. 9 weight % physiological saline solution highly absorbent resin 30 minutes then absorbed the water, after 3 minutes using lever to dewater 250G, highly absorbent resin measured weight of liquor (Tea bag) are disclosed.

Said highly absorbent resin of said 1 0 is violated. 7 psi pressing absorbency reduction for time measured at -20% to 0% to, said highly absorbent resin exceeds 500 parts by weight of 100 parts by weight of inorganic material number 1 number 2 hereinafter 2000 parts by weight of inorganic content, or 700 to 1500 parts by weight parts by weight, or be a 900 to 1300 parts by weight parts by weight.

On the other hand, said highly absorbent resin represented 3 of 0 is violated. 9 psi pressing absorbency reduction -15% to 0% measured at, or -11% to implementation being 0%.

[3 is violated]

0. 9 psi (%)* 100={(A3 - A2)/A2} of a pressurized-water absorbency reduction

Violated in said 3,

A2 is number 1 and number 2 inorganic material do not contain inorganic material in an amount of 4 pressurized absorbency value and calculated by ari absorbent is violated, the number 1 and number 2 A3 inorganic material including highly absorbent acrylic resin in an amount of inorganic material is violated and 4 pressurized absorbency value is calculated by,

[4 is violated]

0. 9 psi (g/g) of AUL=[W₄ (G)- W₃ (G)]/ W₀ (G)

In said 4 is violated,

W₀ (G) initial weight (g) and is ari absorbent, W₃ (G) said absorptive resin is weight and the total weight of the device and ari absorbent can impart thereto, W₄ (G) includes a load (0. 9 psi) 1 time after said resin to a highly saline absorption, highly absorbent resin of said weight and the total of the weight device ari absorbent can impart thereto are disclosed.

The, said highly absorbent resin of said 3 0 is violated. 9 psi pressing absorbency reduction measured at very small to -15% to 0%, as a result of misfortune characteristic can be reduced maintaining conglomerating.

In addition, said another embodiments of highly absorbent resin has a good basic implementation semi absorbent number can exhibit performance. More specifically, said highly absorbent resin is obtained after the following characteristics for evaluating performance semi absorbent basic number can exhibit. More specifically, said highly absorbent resin is obtained after the following characteristics for evaluating performance semi absorbent basic number can exhibit. I.e., a centrifuge is employed for repairing said highly absorbent resin physiological saline solution (CRC) 29 to 31 g/g and, for physiological saline solution 0. 9 psi is 19 to 21 g/g and pressing absorbency (AUL), swelling (GBP) transmittance is 40 to 80 darcy and saline in parallel to each gel bed, 0. 9% by weight of NaCl solution 50 ml number 35 seconds to 45 seconds to 600 rpm agitation at the time of generating a time rate at both industry, or 37 seconds to 43 can be superhuman properties.

Said 0. 9 psi the EDANA WSP 242 of a pressurized-water absorbency (AUL) method. 2 can be measured according to method of. More specifically, at the side of a highly absorbent resin about 0 1 said pressure absorption over time. 9 psi after saline to absorb in the pressing, is violated 4 can be calculated according to:

[4 is violated]

0. 9 psi (g/g) of AUL=[W₄ (G)- W₃ (G)]/ W₀ (G)

In said 4 is violated,

W₀ (G) initial weight (g) and is ari absorbent, W₃ (G) said absorptive resin is weight and the total weight of the device and ari absorbent can impart thereto, W₄ (G) includes a load (0. 9 psi) 1 time after said resin to a highly saline absorption, highly absorbent resin of said weight and the total of the weight device ari absorbent can impart thereto are disclosed.

In addition, in a centrifuge (CRC) method is employed for repairing said saline to EDANA WSP 241. 2 can be measured according to method of. More specifically, over 30 minutes after saline to absorb said repair at the side of a highly absorbent resin, the following is violated 7 can be calculated by:

[7 is violated]

CRC (g/g)={[W₈ (G)- W₇ (G)]/ W₀ (G)} - 1

In said 7 is violated,

W₀ (G) initial weight (g) and is absorptive resin,

W₇ (G) without using a highly resin is, after 3 minutes to dehydrated liquor using lever 250G measuring weight of (Tea bag) and,

W₈ (G) at room temperature is 0. 9 weight % physiological saline solution highly absorbent resin 30 minutes then absorbed the water, after 3 minutes using lever to dewater 250G, highly absorbent resin measured weight of liquor (Tea bag) are disclosed.

For the hereinafter described in patent application number 2014 - 7018005 transmittance (GBP) saline said swell gel bed according (Darcy) or should have a method of cm² Can be measured in units of. 1 darcy is 1 per 1 cm 1 cp viscosity of liquids in air pressure pressure gradient is 1 cm² 1 through 1 mm per second flow means that the substrate. 1 darcy swell gel bed has a discharge area and the light transmission is 0. 98692 x 10^-12 m² Or 0. 98692 x 10^-8 Cm² Such as disclosed.

More specifically, the specification is in GBP 0 psi (or bed) under free swell gel layer called swollen state (or transmissivity) (Under 0psi Swell Pressure Test Gel Bed Permeability (GBP)) and also for penetration of the graphics, said GBP is 1 to 3 also shown by using a device also can.

With reference also to the 3 1 also, GBP for measuring device (500) tested at a device assembly (528) is requested container (530) and a plunger (536) without using a tool. The plunger is perforated cylinder hole shaft having longitudinal axis below (538) and shaft bottom of one head (550) having a predetermined wavelength. Shaft hole (562) has diameter of about 16 mm are disclosed. The plunger head which, for example, connected to a shaft to be by adhesive number. 12 holes (544) radiation axis toward one shaft, each 90° 3 holes located has diameter of about 6. 4 mm are disclosed. Shaft (538) is machined from a material equal to or LEXAN rod which, about 2 outer diameter. 2 cm and about 16 mm diameter are disclosed. Plunger head (550) of the inner bore 7 (560) of on outer hole 14 (554) has, all hole diameter of about 8. 8 mm are disclosed. In addition over about 16 mm holes substantially in line with the shaft. Plunger head (550) is machined from a material and LEXAN rod or equally, and about 16 mm height, diameter is at least wall interval (wall clearance) and cylinder (534) dimensioned to fit inside a size but still be made freely movable. Plunger head (550) shaft (538) on a about 8. 25 cm but, shaft are machined in at the top of the plunger (536) of desired size can be obtained. Plunger (536) is tight and extended axis 2, plunger (536) attached to the lower end of the 100 mesh of stainless steel cloth screen (564) comprises. Screen plunger head (550) using a suitable solvent plunger head securely adhering (550) attached to the base. To move excess solvent is screen openings, liquid flow for reducing the aperture area attention to avoid accomplishing. IPS Corporation (insecticical business: it goes or U.S. California) can be suitably used for acrylic solvent is Weld provided on 4. Sample bottle (530) cylinder (534) and 2 are biaxially stretched tight and cylinder (534) 400 mesh stainless steel cloth screen attached at the lower end of (566) comprises. Screen cylinder securely adhering a suitable solvent using cylinder attached to the base. To move excess solvent is screen openings, liquid flow for reducing the aperture area attention to avoid accomplishing. IPS Corporation (insecticical business: it goes or U.S. California) can be suitably used for acrylic solvent is Weld provided on 4. 2 568 (ari absorbent substitute) is also indicated by the gel particles sample, test during cylinder (534) of screen (566) on rest against disclosed.

Cylinder (534) is equal material or transparent LEXAN rod or down-the-hole, LEXAN tube (tubing) or uniform material the cutting and, about 6 cm diameter (e.g., about 28 cross-sectional area. 27 cm² ), Wall thickness of greater than about 0. 5 cm, height about 7. Number bath to 95 cm can be disclosed. The step portion having outer diameter 66 mm (534a) cylinder (534) present in the bottom of cylinder 31 mm (534) machining diameter of can be formed. Site (534a) on diameter of conform - ring (540) on top of rach can be disclosed.

Annular weight (annular weight) (548) has a diameter about 2. 1 2 cm depth. A 3 cm of opposed hole (counter-a bored) of holes, thus it becomes possible shaft (538) free on rings substrate. Throughput of about 16 mm bore (thru a-bore) annular weights 18 are in addition - (548a) has. Annular weight (548) is stainless steel or 0. 9% by weight of saline (sodium chloride aqueous solution) corrosion can be can be made of other suitable material. Plunger (536) on annular weight (548) such as about 596g and combination of weight, this, sample (568) applied to the pressure above about 28. 27 cm² Over sample area of about 0. 3psi or about 20. 7dyne/cm² (2. 07kPa) 0.1 corresponding to other.

GBP solution flow through the test device during testing when testing, sample bottle (530) is generally wear (weir) (600) from one another by. The aim of the stained sample container (530) to bypass the liquid by overflow at the top of the etch-back step, overflow liquid separate collection device (601) bypass the reaction chamber. The cheap-stained (603) rests balance (602) are located on, substitute sample (568) saline through the collecting can.

"Free swell" gel bed for transmittance test is performed under conditions, weight (548) is plunger device (536) non-sample container (530) and located, using suitable gauge accuracy 0. To the 01 mm, weight (548) from the top of the sample bottle (530) to the bottom of height by using predetermined material. Applying force while measuring the thickness gauge and less as much as possible, preferably about 0. 74N less than. RLE device is used, each empty sample bottle (530), plunger (536) and weight (548) for keeping track used on these important disclosed.

In addition, sample bottle (530) is flat overlying support (base), weight (548) the surface of the sample bottle (530) parallel to a bottom surface of the preferred. And, GBP measuring highly absorbent resin from 4700 sample for testing. In one example, through 30 mesh U.S. standard screen, about 300 to about 600 on 50 mesh U.S. standard screen maintained having diameters of miscibility with the resin micro m test sample with a 4700. About 2. 0g sample of sample bottle (530) and enclosed, spread over the floor of sample vessel installed at 2000. Then, plunger (536) on weight (548) hearing is not 2. 0g contained in wall of sample is 0. 9% by weight to about 60 minutes of swelling in saline into sample pressureless soaking off each other. The, sample bottle (530) liquid reservoir is auctioned at slightly than the bottom of sample container (530) polished on a liquid reservoir located within the mesh. Said mesh include sample bottle (530) will not affect the motion of saline to can be employed. The mesh include Eagle Supply and Plastic of part number 7308 (insecticical business: American wisconsin main applicator tone) can be used. The height of the surface of the saturated saline during defined by saline rather than in a sample vessel can be adjusted so that sample.

At the end of improved, plunger (536) on weight (548) assembly of sample bottle (530) in saturated sample (568) on loaded on the next, sample bottle (530), plunger (536), weight (548) and sample (568) solution drawn from a substrate. Then, before the measured GBP, sample bottle (530), plunger (536), weight (548) and sample (568) a flat uniform thickness of about 30 seconds - deformable plate large grid as each other. Said liquid is a sample vessel plate selection will prevent emitting light energy onto a planar surface. Total dimension plate 7. 6 cm x 7. 6 cm and, each grid dimensions length 1. 59 cm x width 1. 59 cm x depth 1. Implementation being 12 cm. Suitable plate material is available from McMaster Carr Supply Company (insecticical business: main Chicago American [...]) parabolic diffusers, catalog number 1624K 27 and, this cutting appropriate dimensions can be used.

And, from the initial height measurement point number is not changed, using prior to using the same thickness gauge, weight (548) from the top of the sample bottle (530) to the bottom of height again measured as follows. Height measurement device made possible thickness gauge should soon after. Empty sample bottle (530) in the plunger (536) and weight (548) is empty assembly for measuring height of sample value (568) for measuring height must cause saturation of subtracted value obtained after an other. As a result obtained value saturated sample (568) thickness or height "H" are disclosed. In addition, saturated sample (568) assembly including a plate to be included, even when plate-assembly for measuring height of a dial gauge to accomplishing.

Measuring a saturated sample GBP (568), plunger (536) and weight (548) is covers a sample vessel (530) into 0. 9% saline delivery starts with a substrate. Saline cylinder (534) adjusting the flow rate of saline into (flow rate) to overflow into the top of the container, the sample bottle (530) counter to each other consistent equivalent to the height of the head pressure. Instrument pump (604) such as small but consistent amount of overflow from the top of the cylinder with sufficient to ensure any saline by means of can be added. Overflow liquid separate collection device (601) bypass into reaction chamber. Balance (602) and closes (603) using, sample (568) amount of solution passing through the panel weight assay measuring substrate. Once begins then overflow right, 60 seconds at least every second balance (602) data points from each other. The obtained data collection manually or data collection software can be used. Sample substitute (568) the through flow (Q), sample (568) (g) a liquid passing through the panel unit by suitable linear minimum number (sec) product (linear least-a square fit) determines g/sec.

6 thus obtained according to the following using data is violated said GBP (cm² ) Is calculated transmittance can be identifying gel bed.

[6 is violated]

K=[Q * H * μ] / [A * ρ * P]

In said 6 is violated,

K has a gel bed permeability (cm² ) And,

Q is flow (g/sec) and,

H is the height of the swollen sample (cm) and,

Liquid viscosity μ (P) (this sensor test solution has a viscosity of about 1 cp) and,

A liquid flow cross-sectional area (this is represented by a sample vessel sensor 28. 27 cm2) and,

Liquid density ρ (g/cm³ ) (This sensor for the test solution about 1 g/cm³ ) And,

Integer pressure P (dyne/cm² ) (Normally about 7, 797dyne/cm² ) Are disclosed.

P=ρ * g * h agent is type integer values, the liquid density ρ (g/cm³ ) And, g is gravity acceleration (alternatively 981 cm/sec nominal² ) And, h liquid height (for example, the specification for the test a GBP 7. 95 cm) are disclosed.

Said highly absorbent resin of said 3 0 is violated. 9 psi pressing absorbency reduction for time measured at -15% to 0% to, said highly absorbent resin 100 parts by weight of 1 to 500 parts by weight of inorganic material number 1 number 2 parts by weight of inorganic content, or 10 parts by weight to 200 parts by weight, or 20 parts by weight to 100 parts by weight of be a.

On the other hand, according to another embodiment of the invention, at least some of the water-soluble ethylenically unsaturated monomer having an acid group neutralized crosslinked polymer including base resin powder; formed on said base resin powder, number 1 crosslink layer surface containing inorganic material; and said surface crosslinked layer formed on a surface of number 2 inorganic materials, 5 to 85% to 100% of casing preventing efficiency number encoded in highly absorbent resin ball is violated.

[5 is violated]

(%)=casing preventing efficiency [W₆ (G)/W₅ (G)]* 100

In said 5 is violated,

W₅ (G) initial weight (g) and is ari absorbent, W₆ (G) after applying the temperature 40 ± 3 °C is 9 cm diameter cap reflects most light, humidity of air conditioner chamber 80 ± 3% holding in 10 minutes, 5 minutes at room temperature cooling to come in contact. Filter pay amount (g) when the highly absorbent resin when the cap dish calculator are disclosed.

At room temperature (room temperature) which means "room temperature" in the specification and RM, e.g. temperature of 20 °C to 30 °C, preferably at a temperature of 25 °C big.

Said highly absorbent resin can be obtained by said method embodiments of one implementation ari absorbent bath number. Said ethylenically unsaturated monomer, base resin powder, surface crosslinked layer, said inorganic material number 1 and number 2 implementation or other embodiments the present invention relates to inorganic material comprising an intervening content.

5 85% to 100% of said casing preventing efficiency said highly absorbent resin is violated, or 86% to 100%, 87% to 100%, 100% to 88%, 89% to 100%, 90% to 100%, 100% to 91%, 92% to 100%, 93% to 100%, 94% to 100%, implementation being 100% to 95%.

Thus it is said in another embodiments which can exhibit a highly the resins have high casing preventing efficiency, the highly absorbent resin carrier, the casing is to minimize moisture absorption during transport on atmosphere caused by excellent durability can be implemented.