Process for preparing polyisocyanates containing biuret groups

The present invention relates to a process for preparing polyisocyanates containing biuret groups from di- or polyisocyanates with diamines.

High-functionality highly branched or hyperbranched polycarbonates and their preparation and use

The present invention relates to high-functionality, highly branched or hyperbranched polycarbonates based on dialkyl or diaryl carbonates or phosgene, diphosgene or triphosgene and on aliphatic, aliphatic/aromatic, and aromatic diol or polyols, and their use for producing paint systems.

Metering unit

In a metering unit (10) with at least one output (20) for dispensing an aerosol at a defined concentration, with at least one input (180) for a carrier gas, at least one input for a liquid, preferably for a hydrogen peroxide solution, and a buffer container (30) for the liquid, provision is made for the metering unit (10) to have at least one liquid flow regulator (90) on the discharge side.

Highly functional, hyperbranched polycarbonates and production and use thereof

The present invention relates to hyperbranched polycarbonates with stabilizing groups, produced by the reaction of (a) at least one compound with at least three alcoholic hydroxyl groups per molecule with (b) at least one reagent of the general formula (I), (c) at least one reagent of the general formula X<3>-(A<1>)m-X<4>, wherein the variables are defined as follows: X<1>, X<2> equal or different and chosen of halogen, C1-C10 alkoxy, C6-C10 aryloxy and O-C(=O)-halogen, X<3> being a functional group, chosen of OH, SH, NH2, NH-C1-C4 alkyl, isocyanat, epoxy, COOH, COOR<12>, C(=O)-O-C(=O), C(=O)-Cl, R<12> C1-C4 alkyl or C6-C10 aryl, A<1> a spacer or a single bond, m being zero or one, X<4> a group chosen from phenol groups, benzophenones, aromatic amines and nitrogen containing heterocyles, substituted or nonsubstituted respectively.

Metering unit

In a metering unit ( 10 ) having at least one outlet ( 20 ) for dispensing an aerosol with a defined concentration, with at least one inlet ( 180 ) for a carrier gas, at least one inlet for a liquid, preferably for a hydrogen peroxide solution, and a buffer container ( 30 ) for the liquid, it is provided that the metering unit ( 10 ) has at least one liquid flow controller ( 90 ) on the outflow side.

Catalysts for polyurethane coating compounds

The present invention relates to coating compounds for polyurethane paints, comprising novel catalysts.

Process for preparing polyisocyanates which are flocculation-stable in solvents from (cyclo)aliphatic diisocyanates

The present invention relates to a new process for preparing polyisocyanates containing isocyanurate groups and being flocculation-stable in solvents from (cyclo)aliphatic diisocyanates.

Two-component coating compositions

The present invention relates to two-component coating compositions which do not comprise any polyisocyanates or melamine-formaldehyde resins as crosslinkers for curing.

PROCESS FOR PREPARING POLYISOCYANATES WHICH ARE FLOCCULATION-STABLE IN SOLVENTS FROM (CYCLO)ALIPHATIC DIISOCYANATES

The present invention relates to a new process for preparing polyisocyanates containing isocyanurate groups and being flocculation-stable in solvents from (cyclo)aliphatic diisocyanates. 2. The use of additives according to claim 1 , wherein the polyisocyanates are (cyclo)aliphatic.3. The use of additives according to claim 1 , wherein the polyisocyanates are based on hexamethylene diisocyanate and/or isophorone diisocyanate as monomers.4. The use of additives according to any of the preceding claims claim 1 , wherein the polyisocyanates have isocyanurate claim 1 , biuret or allophanate (optionally with urethane) structures.5. The use of additives according to any of the preceding claims claim 1 , wherein the polyisocyanate comprises isocyanurate claim 1 , urethane and/or allophanate groups which have been obtained using an ammonium carboxylate or ammonium α-hydroxycarboxylate catalyst.6. The use of additives according to any of to claim 1 , wherein the polyisocyanates are polyisocyanates which contain isocyanurate groups and have been obtained by thermal deactivation of the catalyst.7. The use of additives according to any of to claim 1 , wherein the polyisocyanates are polyisocyanates which contain isocyanurate groups and have been obtained by thermal deactivation of the catalyst through addition of deactivators.8. The use of additives according to claim 1 , wherein these additives are used substoichiometrically in relation to the amount of water present in the polyisocyanate mixture.10. The use of additives according to claim 1 , wherein the polyisocyanates admixed with additive further comprise at least one phenyl or bridged bisphenol which has exactly one phenolic hydroxyl group on the or each aromatic ring and has alkyl groups in the positions ortho to the phenolic hydroxyl group.11. The use of additives according to claim 10 , wherein the polyisocyanates admixed with additive further comprise at least one dialkyl phosphate claim 10 , dialkyl phosphonate and/ ...

COLOR-STABLE CURING AGENT COMPOSITIONS COMPRISING POLYISOCYANATES OF (CYCLO)ALIPHATIC DIISOCYANATES

The present invention relates to a new process for preparing polyisocyanates of (cyclo)aliphatic diisocyanates, said polyisocyanates containing isocyanurate groups and being stable with respect to color drift in solvents. 1. A polyisocyanate composition comprising(A) at least one polyisocyanate obtainable by reacting at least one monomeric isocyanate,(B) at least one Lewis-acidic organometallic compound able to accelerate the reaction of isocyanate groups with isocyanate-reactive groups,(C) at least one Brønsted acid having a pKa of less than 4,(D) at least one sterically hindered phenol,(E) at least one solvent,(F) optionally other, typical coatings additives.2. The polyisocyanate composition according to claim 1 , wherein the monomeric isocyanate is a diisocyanate selected from the group consisting of 1 claim 1 ,6-hexamethylene diisocyanate claim 1 , isophorone diisocyanate claim 1 , 1 claim 1 ,3-bis(isocyanatomethyl)cyclohexane claim 1 , 4 claim 1 ,4′-di(isocyanatocyclohexyl)methane claim 1 , and 2 claim 1 ,4′-di(isocyanatocyclohexyl)methane.3. The polyisocyanate composition according to or claim 1 , wherein the polyisocyanate (A) contains isocyanurate claim 1 , biuret claim 1 , urethane and/or allophanate groups and/or iminooxadiazinedione groups.4. The polyisocyanate composition according to any of the preceding claims claim 1 , wherein the polyisocyanate (A) comprises isocyanurate claim 1 , urethane and/or allophanate groups prepared using an ammonium carboxylate or ammonium α-hydroxycarboxylate catalyst.5. The polyisocyanate composition according to any of the preceding claims claim 1 , wherein the polyisocyanate comprises a polyisocyanate comprising isocyanurate groups claim 1 , having a viscosity of 600-4000 mPa*s claim 1 , and/or a low-viscosity urethane and/or allophanate having a viscosity of 150-1600 mPa*s.6. The polyisocyanate composition according to claim 1 , wherein the Lewis-acidic organometallic compound (B) comprises a metal selected from the ...

Metering Unit

In a metering unit () having at least one outlet () for dispensing an aerosol with a defined concentration, with at least one inlet () for a carrier gas, at least one inlet for a liquid, preferably for a hydrogen peroxide solution, and a buffer container () for the liquid, it is provided that the metering unit () has at least one liquid flow controller () on the outflow side. 1. A metering unit having at least one outlet for dispensing an aerosol with a defined concentration , having at least one inlet for a carrier gas , at least one inlet for a liquid , preferably for a hydrogen peroxide solution , and a buffer container for the liquid , wherein the metering unit has at least one liquid flow controller on its outflow side.290101102. The metering unit according to claim 1 , wherein the at least one liquid flow controller () has two absolute pressure measuring cells ( claim 1 , ) and operates according to the differential pressure method.3304050. The metering unit according to claim 1 , wherein the buffer container () is mounted between a first and a second carrier module ( claim 1 , ).4405090. The metering unit according to claim 3 , wherein claim 3 , each carrier module ( claim 3 , ) is also at least one of fluidically and mechanically connected to at least one liquid flow controller ().54030. The metering unit according to claim 3 , wherein a channel is provided in the first carrier module () claim 3 , which is formed as an inflow for the buffer container ().6309040. The metering unit according to wherein at least one fluid connection is provided between the buffer container () and an inlet of the at least one liquid flow controller () in the first carrier module ().780704030. The metering unit according to claim 3 , wherein a port () for a pressure relief valve () is provided in the first carrier module () for controlling the pressure in the buffer container ().87030. The metering unit according to claim 7 , wherein the liquid exiting at the pressure relief ...

ONE-COMPONENT AMINO RESIN COATING COMPOSITIONS

The present invention relates to one-component amino resin coating compositions having good chemical resistance, a good balance of hardness to elasticity, and rapid drying, to their use, and to methods for coating. Synthesis components that the coating compositions comprise include amino resin, hydroxyl-containing polymers as principal polyols, and certain branched polyester polyols, obtainable by polycondensation of hexahydrophthalic anhydride, trimethylolpropane, and optionally further components. 1: A one-component amino resin coating composition , comprising as synthesis components(A) at least one amino resin selected from the group consisting of a melamine-formaldehyde resin, a benzoguanamine-formaldehyde resin, and a urea-formaldehyde resin,(B) at least one hydroxyl-containing polymer selected from the group consisting of a poly(meth)acrylate polyol (B1), a polyester polyol (B2), a polyetherol (B3), an alkyd resin (B4), and a polycarbonate polyol (B5), hexahydrophthalic anhydride,', 'trimethylolpropane,', 'optionally at least one diol,', 'optionally at least one further triol, and', 'optionally at least one further diacid or triacid or a derivative thereof,', 'where a molar ratio of acid groups to hydroxyl groups in preparing the polyester polyol is 1:1 to 1:1.95, the polyester polyol contains less than 20% tetraalcohol stoichiometrically relative to hexahydrophthalic anhydride, and, '(C) at least one branched polyester polyol prepared by polycondensation of'}the polyester polyol is not formed from dihydroxycarboxylic acids,(D) optionally at least one chemical crosslinker selected from the group consisting of a blocked polyisocyanate, a trisalkylcarbamoyltriazine, an epoxy resin, a carboxyl-containing resin, and an amino-containing resin other than the amino resin (A),(E) optionally at least one organic solvent,(F) optionally at least one catalyst,(G) optionally at least one coating additive, and(H) optionally at least one filler, dye and/or pigment,wherein a ...

TWO-COMPONENT COATING COMPOUNDS

The present invention relates to the use of two-component coating compositions comprising isocyanurates of pentamethylene diisocyanate and NCO group reactive compounds with rapid curing and good chemical resistance at temperatures to 80° C. 1. A method of coating a substrate , comprisingapplying to the substrate a coating composition comprising:a) at least one polyisocyanate obtained by reacting pentamethylene diisocyanate;b) at least one hydroxy-functional poly(meth)acrylate polyol;c) at least one Lewis base as urethanization catalyst;d) at least one organic solvent;e) optionally a coating additive;f) optionally a filler, a dye, and/or a pigment; and curing the coating composition at a temperature of 80° C. or less.2. The method according to claim 1 , wherein the polyisocyanate a) is selected from the group consisting of isocyanurates claim 1 , urethanes claim 1 , and allophanates.3. The method according to claim 1 , wherein the polyisocyanate a) is a polyisocyanate comprising isocyanurate groups.4. The method according to claim 1 , wherein the polyisocyanate a) has a viscosity of 300-1200 mPa*s (23° C.).5. The method according to claim 1 , wherein the poly(meth)acrylate polyol b) has a molecular weight M(number average) of 500 to 50 000 D.6. The method according to claim 1 , wherein the coating composition further comprises at least one polyester polyol which has a number-average molecular weight Mn of 500 to 4000 and/or a polydispersity of less than or equal to 5.7. The method according to claim 1 , wherein the Lewis base c) has a pKa of more than 8.8. The method according to claim 1 , wherein the Lewis base c) is selected from the group consisting of tertiary aliphatic claim 1 , cycloaliphatic claim 1 , aromatic amines claim 1 , amidines claim 1 , guanidines and ionic liquids comprising amine groups.9. The method according to claim 1 , wherein the Lewis base c) is a cycloaliphatic amine.10. The method according to claim 1 , wherein the curing is performed at a ...

COLOR-STABLE CURING COMPOSITIONS COMPRISING POLYISOCYANATES OF (CYCLO)ALIPHATIC DIISOCYANATES

The present invention relates to a novel process for preparing polyisocyanates of (cyclo)aliphatic diisocyanates that are stable to color drift in solvents and in the presence of Lewis acids. 1: A polyisocyanate composition , comprising:(A) at least one (cyclo)aliphatic polyisocyanate obtained by reacting at least one monomeric isocyanate,{'sub': 'n', '(B) at least one sterically hindered phenol having a melting point of below 40° C. and a number-average molecular weight Mbetween 650 and 2550 g/mol, comprising at least two phenolic groups,'}(C) at least one Lewis-acidic organic metal compound capable of accelerating the reaction of isocyanate groups with isocyanate-reactive groups,(D) at least one solvent,(E) optionally at least one further antioxidant,(F) optionally at least one Brønsted acid having a pKa less than 4,(G) optionally other coatings additives.2: The polyisocyanate composition according to claim 1 , wherein the monomeric isocyanate is a diisocyanate selected from the group consisting of hexamethylene 1 claim 1 ,6-diisocyanate claim 1 , pentamethylene 1 claim 1 ,5-diisocyanate claim 1 , isophorone diisocyanate claim 1 , 1 claim 1 ,3-bis(isocyanatomethyl)cyclohexane claim 1 , 4 claim 1 ,4′-di(isocyanatocyclohexyl)methane and 2 claim 1 ,4′-di(isocyanatocyclohexyl)methane.3: The polyisocyanate composition according to claim 1 , wherein the polyisocyanate (A) has isocyanurate groups claim 1 , biuret groups claim 1 , allophanate groups claim 1 , urethane groups claim 1 , uretdione and/or iminooxadiazinedione groups.4: The polyisocyanate composition according to claim 1 , wherein the polyisocyanate (A) has an NCO content in the range from 5% to 25% by weight.5: The polyisocyanate composition according to claim 1 , wherein the polyisocyanate (A) comprises isocyanurate groups and/or allophanate/urethane groups that have been prepared using an ammonium carboxylate claim 1 , ammonium hydroxycarboxylate or ammonium hydroxide catalyst.6: The polyisocyanate ...

COLOUR-STABLE CURING COMPOSITIONS CONTAINING POLYISOCYANATES OF (CYCLO)ALIPHATIC DIISOCYANATES

The present invention relates to a novel process for preparing isocyanurate-comprising polyisocyanates of (cyclo)aliphatic diisocyanates that are especially stable to color drift in solvents. 1. A polyisocyanate composition , comprising:(A) at least one polyisocyanate obtainable by reacting at least one monomeric isocyanate,(B) at least one salt in an amount of 10 to 300 ppm by weight, based on component (A), consisting of (B1) a phosphorus-containing acidic compound and (B2) an open-chain trisubstituted amine,(C) at least one sterically hindered phenol,(D) optionally at least one further antioxidant,(E) at least one Lewis-acidic organic metal compound capable of accelerating the reaction of isocyanate groups with isocyanate-reactive groups,(F) at least one solvent, and(G) optionally other coatings additives.2. The polyisocyanate composition according to claim 1 , wherein the monomeric isocyanate is a diisocyanate selected from the group consisting of hexamethylene 1 claim 1 ,6-diisocyanate claim 1 , pentamethylene 1 claim 1 ,5-diisocyanate claim 1 , isophorone diisocyanate claim 1 , 1 claim 1 ,3-bis(isocyanatomethyl)cyclohexane claim 1 , 4 claim 1 ,4′-di(isocyanatocyclohexyl)methane and 2 claim 1 ,4′-di(isocyanatocyclohexyl)methane.3. The polyisocyanate composition according to claim 1 , wherein the polyisocyanate (A) comprises isocyanurate groups claim 1 , biuret groups claim 1 , urethane groups claim 1 , allophanate groups and/or iminooxadiazinedione groups.4. The polyisocyanate composition according to claim 1 , wherein the polyisocyanate (A) comprises isocyanurate claim 1 , allophanate and/or urethane groups that have been prepared using an ammonium carboxylate claim 1 , ammonium hydroxide or ammonium α-hydroxycarboxylate catalyst.5. The polyisocyanate composition according to claim 1 , wherein the polyisocyanate (A) is a polyisocyanate comprising primarily isocyanurate groups and having a viscosity of 500-4000 mPa*s and/or a low-viscosity allophanate ...

COLOUR-STABLE CURING COMPOSITIONS CONTAINING POLYISOCYANATES OF (CYCLO)ALIPHATIC DIISOCYANATES

The present invention relates to novel color drift-stable compositions of polyisocyanates of (cyclo)aliphatic diisocyanates. 1. A polyisocyanate composition comprising(A) at least one polyisocyanate obtained by reacting at least one monomeric (cyclo)aliphatic isocyanate, wherein the at least one polyisocyanate has an NCO content of at least 15% by weight,(B) at least one silyl ester selected from the group of silyl phosphates and silyl phosphonates in an amount of 0.2 to 300 ppm by weight, based on component (A),(C) at least one sterically hindered phenol,(D) at least one Lewis-acidic organic metal compound capable of accelerating the reaction of isocyanate groups with isocyanate-reactive groups,(E) at least one solvent,(F) optionally at least one further antioxidant, and(G) optionally other coatings additives.2. The polyisocyanate composition according to claim 1 , wherein the at least one silyl ester (B) is a silyl phosphate.3. The polyisocyanate composition according to claim 1 , wherein the at least one silyl ester (B) is a tris(silyl) phosphate.4. The polyisocyanate composition according to claim 1 , wherein the at least one silyl ester (B) is present in an amount of 10 to 300 ppm by weight claim 1 , based on component (A).5. The polyisocyanate composition according to claim 1 , wherein the at least one (cyclo)aliphatic isocyanate is selected from the group consisting of hexamethylene diisocyanate claim 1 , pentamethylene diisocyanate claim 1 , isophorone diisocyanate claim 1 , 1 claim 1 ,3-bis(isocyanatomethyl)cyclohexane claim 1 , 4 claim 1 ,4′-di(isocyanatocyclohexyl)methane and 2 claim 1 ,4′-di(isocyanatocyclohexyl)methane.6. The polyisocyanate composition according to claim 1 , wherein the at least one polyisocyanate (A) has been prepared using a catalyst based on ammonium carboxylate claim 1 , ammonium a-hydroxyalkylcarboxylate or ammonium hydroxide.7. The polyisocyanate composition according to claim 1 , wherein the at least one sterically hindered ...

Method for producing polyisocyanates of (cyclo)aliphatic diisocyanates which are flocculation-stable in solvents

The present invention relates to a new process for preparing polyisocyanates containing isocyanurate groups and being flocculation-stable in solvents from (cyclo)aliphatic diisocyanates.

HIGHLY FUNCTIONAL, HYPERBRANCHED POLYCARBONATES AND PRODUCTION AND USE THEREOF

Hyperbranched polycarbonates having stabilizing groups, prepared by reaction of 2. The hyperbranched polycarbonate according to claim 1 , wherein Ais a single bond or a C-C-alkylene group.34-. (canceled)5. The hyperbranched polycarbonate according to claim 1 , wherein at least one compound having at least three hydroxyl groups per molecule (a) is selected from among glycerol and (HO—CH)X claim 1 , unalkoxylated or alkoxylated by from one to one hundred C-C-alkylene oxide units per hydroxyl group claim 1 , where Xis selected from among a nitrogen atom and C—R claim 1 , where Ris selected from among hydrogen and C-C-alkyl.6. The hyperbranched polycarbonate according to claim 1 , which has a dynamic viscosity in the range from 100 to 150 000 mPa·s determined at 23° C.7. The hyperbranched polycarbonate according to claim 1 , which has a glass transition temperature Tin the range from −70° C. to 10° C.8. The hyperbranched polycarbonate according to claim 1 , which is prepared with at least one compound (a) having at least three alcoholic hydroxyl groups per molecule in a mixture with at least one compound (d) having two alcoholic hydroxyl groups per molecule.9. A process for preparing hyperbranched polycarbonates according to claim 1 , which comprises mixingat least one compound having at least three alcoholic hydroxyl groups per molecule andat least one reagent of the general formula I,{'sup': 3', '1', '4, 'sub': 'm', 'at least one reagent of the general formula X-(A)-X, and,'}if appropriate, at least one compound having two alcoholic hydroxyl groups per moleculewith one another and heating them to a temperature in the range from 60 to 260° C.10. The process according to claim 9 , wherein heating is carried out in the presence of an inorganic or organic base.11. (canceled)12. A process for preparing thermoplastics or thermosets using at least one hyperbranched polycarbonate according to .13. (canceled)14. A process for preparing polyoxymethylene using at least one ...

METHOD FOR PRODUCING POLYISOCYANATES OF (CYCLO)ALIPHATIC DIISOCYANATES WHICH ARE FLOCCULATION-STABLE IN SOLVENTS

The present invention relates to a new process for preparing polyisocyanates containing isocyanurate groups and being flocculation-stable in solvents from (cyclo)aliphatic diisocyanates. 1: A method for reducing flocculation and/or precipitation in a polyisocyanate mixture comprising at least one solvent , the method comprising:adding at least one additive into the polyisocyanate mixture,wherein the additive is at least one selected from the group consisting of [{'sub': 1', '18, '(A1a) a mono- and/or di-Cto Calkyl phosphate,'}, {'sub': 1', '18, '(A1b) a mono- and/or di-Cto Calkyl phosphonate,'}, {'sub': 1', '12, '(A1c) a mono-Cto Calkyl phosphinate, and'}, '(A1d) an alkyl derivative of another phosphorus-containing diacid,, '(A1) at least one phosphorus-containing acidic compound selected from the group consisting of'}and(A2) at least one open-chain trisubstituted amine.2: The method according to claim 1 , wherein the polyisocyanate is (cyclo)aliphatic.3: The method according to claim 1 , wherein the polyisocyanate is at least one polyisocyanate made from at least one monomer selected from the group consisting of hexamethylene 1 claim 1 ,6-diisocyanate claim 1 , pentamethylene 1 claim 1 ,5-diisocyanate claim 1 , isophorone diisocyanate claim 1 , 1 claim 1 ,3-bis(isocyanatomethyl)cyclohexane claim 1 , 4 claim 1 ,4′-di(isocyanato¬cyclo¬hexyl)-methane and 2 claim 1 ,4′-di(isocyanatocyclohexyl)methane.4: The method according to claim 1 , wherein the polyisocyanate has isocyanurate claim 1 , iminooxadiazinedione claim 1 , biuret or allophanate optionally with urethane structures.5: The method according to claim 1 , wherein the additive is the at least one open-chain trisubstituted amine (A2) claim 1 , which is a trialkylamine.6: The method according to claim 1 , wherein the additive is the at least one open-chain trisubstituted amine (A2) claim 1 , which has a first corresponding acid having a pKa of between 5 and 14 at 25° C. in an aqueous solution.7: The method ...

CATALYSTS FOR POLYURETHANE COATING COMPOUNDS

The present invention relates to new catalysts for curing solventborne or solvent-free coating compositions, such as 2-component polyurethane coating materials or 2-component polyurethane adhesives. 2. The method according to claim 1 , wherein said monomeric isocyanate for the polyisocyanate (A) is an (cyclo)aliphatic monomeric isocyanate.3. The method according to claim 1 , wherein said polyisocyanate (A) is selected from the group consisting of an isocyanurate claim 1 , a biuret claim 1 , a urethane claim 1 , an allophanate claim 1 , and a mixture thereof.4. The method according to claim 1 , wherein said binder (B) is selected from the group consisting of a polyacrylate polyol claim 1 , a polyester polyol claim 1 , a polyurethane polyol claim 1 , a polycarbonate polyol claim 1 , a polyether polyol claim 1 , and a mixture thereof.5. The method according to claim 1 , wherein the binder has an acid number of less than 100.6. The method according to claim 1 , wherein the radicals Rto Rin the imidazolium ion (C) are independently of one another a Cto Calkyl group.7. The method according to claim 1 , wherein the radicals Rand Rin the imidazolium ion (C) are independently of one another a methyl claim 1 , ethyl claim 1 , n-propyl or n-butyl group.8. The method according to claim 1 , wherein the coating composition further comprises a different urethanization catalyst (E) or a basic catalyst.10. The method according to claim 1 , wherein the curing is carried out at a temperature of below 110° C.11. The method according to claim 1 , wherein the coating composition has a solids content of more than 58% with a flow time (DIN 4 cup) of 20 seconds at 23° C.12. A coating material as material for coating a substrate by the method according to claim 1 , the coating material comprising(A) the at least one polyisocyanate obtained by reacting at least one monomeric isocyanate,(B) the at least one compound comprising at least two isocyanate-reactive groups, and having a number- ...

Colour stable curing agent compositions containing polyisocyanates of (cyclo)aliphatic diisocyanates

Die vorliegende Erfindung betrifft ein neues Verfahren zur Herstellung von insbesondere in Lösungsmitteln farbdriftstabilen, Isocyanuratgruppen aufweisenden Polyisocyanaten von (cyclo)aliphatischen Diisocyanaten. The present invention relates to a novel process for the preparation of polyisocyanates of (cyclo) aliphatic diisocyanates containing isocyanurate groups which are resistant to color drift, in particular in solvents.

Color-stable curing agent compositions comprising polyisocyanates of (cyclo)aliphatic diisocyanates

Polyisocyanate composition containing - (A) at least one polyisocyanate obtainable by reacting at least one monomeric isocyanate, - (B) at least one solvent containing a mixture of C7 - C14 aromatic hydrocarbons, - (C) optionally at least one further solvent, - (D) optionally at least one Lewis-acidic organic metal compound capable of accelerating the reaction of isocyanate groups with isocyanate-reactive groups, - (E) optionally other coatings additives, wherein the amount of cumene in component (B) is less than 1 wt%, preferably less than 0,7 wt%.

Polyisocyanates containing allophanate groups

Allophanate-group-containing polyisocyanates based on isophorone diisocyanate, represented by formula (I) wherein R a , k, m, (k +m), Y, X i , n and R b are as defined, and to their use.

Water-emulsifiable isocyanates with improved properties

A process for producing a water-emulsifiable polyisocyanate formulation, in which, in a first process step,(A) a dispersion-active reaction product (E) is prepared from at least one diisocyanate selected from the group of hexamethylene 1,6-diisocyanate, pentamethylene 1,5-diisocyanate, 4,4′-di(isocyanatocyclohexyl)methane, 1-isocyanato-3,3,5-trimethyl-5-(isocyanatomethyl)cyclohexane, tolylene 2,4- and 2,6-diisocyanate, tetramethylxylylene diisocyanate, p-xylylene diisocyanate, 2,4′- and 4,4′-diisocyanatodiphenylmethane, with at least one mono- or polyhydric polyalkylene ether alcohol having 2 to 4 carbon atoms in the alkylene groups that comprises a polymer chain having at least 8 ethylene oxide units, and the resultant reaction product (E), in a second process step,(B) is mixed with at least one (cyclo)aliphatic polyisocyanate having an average NCO functionality of 2.2 to 5.0, preferably of 2.5 to 4.0,wherein step (B) is performed in the presence of an allophanatization catalyst and the conditions are chosen such that (E) and the polyisocyanate form allophanate groups, characterized in that the allophanatization catalyst is at least one salt consisting of a metal cation and at least one dithiophosphate anion.

Method of producing pure silicon

PANEL FIXING DEVICE WITH DOWELS.

1. Device for attaching a panel (1) or the like to a wall (2) or the roof of a building and having, traversing a through bore (6) in the panel or the like and engaging a fixing bore (10) in the wall or on the roof, a plug (8) and an anchoring sleeve (7) for direct insertion into the through bore in the panel or the like, characterized in that the walls of the anchoring sleeve (7, 22) comprise at least one but preferably a plurality of apertures (19) and in that they are provided with an aligning device (21) for a press adapted to be inserted into the anchoring sleeve and carrying adhesive or the like, the inner end of the anchoring sleeve (7, 22) which is associated with the wall (2) being occluded by a wall (18) which can be pierced, the plug (8, 23) being connected or connectable to the anchoring sleeve in traction and compression resistant manner.

WATER DISPERSIBLE, HIGHLY FUNCTIONAL POLYISOCYANATES

Water-emulsifiable isocyanates with improved properties

The invention relates to a method for preparing a water-emulsifiable polyisocyanate preparation, in which in a first method step (A), a dispersing reaction product (E) is prepared from: at least one diisocyanate, selected from among the group comprising 1,6-hexamethylene diisocyanate, 1,5-pentamethylene diisocyanate, 4,4'-di-(isocyanatocyclohexyl)-methane, 1-isocyanato-3,3,5-trimethyl-5-(isocyanatomethyl)cyclohexane, 2,4- and 2,6-toluylene diisocyanate, tetramethylxylylene-diisocyanate, p-xylylene diisocyanate, and 2,4'- and 4,4'-di-isocyanatodiphenyl methane; and at least one mono- or polyvalent polyalkylene ether alcohol having 2 to 4 C-atoms in the alkylene groups and having a polyether chain containing at least 8 ethylene oxide units, and the resultant reaction product (E) is mixed, in a second method step (B), with at least one (cyclo)aliphatic polyisocyanate with an average NCO functionality of 2.2 to 5.0, preferably 2.5 to 4.0, step (B) being carried out in the presence of an allophanatisation catalyst and the conditions being chosen such that allophanate groups are formed from (E) and the polyisocyanate, characterised in that the allophanatisation catalyst is at least one salt consisting of a metal cation and at least one dithiophosphate anion.

High-functionality highly branched or hyperbranched polycarbonates and their preparation and use

High-functionality highly branched or hyperbranched polycarbonates based on dialkyl or diaryl carbonates or on phosgene, diphosgene or triphosgene and aliphatic, aliphatic/aromatic and aromatic diols or polyols and also their use for preparing coating systems.

Process for the production of polyurethane foams

Polyisocyanate-containing formulations

A mixture comprising - (A) at least one polyisocyanate obtainable by reacting at least one monomeric isocyanate,- (B) p-cymene, - (C) optionally at least one further solvent other than (B),- (D) optionally at least one Lewis-acidic organic metal compound capable of 0accelerating the reaction of isocyanate groups with isocyanate-reactive groups and - (E) optionally other coatings additives.

Two-component coating compositions

27Two-component coating compositionsAbstract5 The present invention describes two-component coating compositions which for curing require no polyisocyanates or melamine-formaldehyde resins as crosslinkers. No suitable figure

USE OF HIGH-FUNCTIONAL, HIGH- OR HYPER-BRANCHED POLYCARBONATES

Wasseremulgierbare polyisocyanate

Color-stable curing agent compositions comprising polyisocyanates of (cyclo)aliphatic diisocyanates

Polyisocyanate composition containing - (A) at least one polyisocyanate obtainable by reacting at least one monomeric isocyanate, - (B) at least one solvent containing a mixture of C7 - C14 aromatic hydrocarbons, - (C) optionally at least one further solvent, - (D) optionally at least one Lewis-acidic organic metal compound capable of accelerating the reaction of isocyanate groups with isocyanate-reactive groups, - (E) optionally other coatings additives, wherein the amount of cumene in component (B) is less than 1 wt%, preferably less than 0,7 wt%.

Verfahren zur herstellung von polyurethan- schaumstoffen

Color-stable curing agent compositions comprising polyisocyanates of (cyclo)aliphatic diisocyanates

Polyisocyanate composition containing(A) at least one polyisocyanate obtainable by reacting at least one monomeric isocyanate,(B) at least one solvent containing a mixture of C7-C14 aromatic hydrocarbons,(C) optionally at least one further solvent,(D) optionally at least one Lewis-acidic organic metal compound capable of accelerating the reaction of isocyanate groups with isocyanate-reactive groups,(E) optionally other coatings additives,wherein the amount of cumene in component (B) is less than 1 wt %, preferably less than 0.7 wt %.

Wasserdispergierbare polyisocyanate

Method for producing polyisocyanates of (cyclo)aliphatic diisocyanates which are flocculation-stable in solvents

The present invention relates to a new process for preparing polyisocyanates containing isocyanurate groups and being flocculation-stable in solvents from (cyclo)aliphatic diisocyanates.

Wasserdispergierbare, hochfunktionelle polyisocyanate

Hochfunktionelle, hyperverzweigte polycarbonate sowie deren herstellung und verwendung

Verfahren zum betrieb eines streckennetzes

Hochfunktionelle, hoch- oder hyperverzweigte polyester sowie deren herstellung und verwendung

Rataverkoston ohjausmenetelmä

Polyisocyanate-containing formulations

A mixture comprising - (A) at least one polyisocyanate obtainable by reacting at least one monomeric isocyanate,- (B) p-cymene, - (C) optionally at least one further solvent other than (B),- (D) optionally at least one Lewis-acidic organic metal compound capable of 0accelerating the reaction of isocyanate groups with isocyanate-reactive groups and - (E) optionally other coatings additives.

Verfahren zur katalytischen hydrierung

Rataverkoston ohjausmenetelmä

Verfahren zur herstellung von in lösungsmitteln flockulationsstabilen polyisocyanaten von (cyclo)aliphatischen diisocyanaten.

Die vorliegende Erfindung betrifft ein neues Verfahren zur Herstellung von in Lösungsmitteln flockulationsstabilen, Isocyanuratgruppen aufweisenden Polyisocyanaten von (cyclo)aliphatischen Diisocyanaten.

Verfahren zur herstellung von extrudierten offenzelligen schaumstoffplatten

Zpusob stabilizace chloroveho polyolefinu

Sposob i oborudovanie dlja izgotovlenija polykh vspenitykh profil'nykh izdelij

Verfahren zur herstellung von extrudierten offenzelligen schaumstoffplatten

Method of chlorinated polyolefin stabilization

Verfahren zum Betrieb eines Streckennetzes

Rataverkoston ohjausmenetelmä

System for conveying a sterilization medium and method of providing a sterilization medium

A system for conveying a sterilization medium comprises at least two buffer containers for sterilization medium which are arranged so as to be connected in parallel, at least one fluid flow controller, to which each of the buffer containers is fluidically coupled, and a pressure media supply device, which couples a pressure medium source to the buffer containers and is adapted to act upon the buffer containers with a pressure medium. The system is configured such that for each buffer container a fill mode and a spray mode can be set. In the fill mode the correspondingly switched buffer container is adapted to be filled with the sterilization medium from a supply device, and in the spray mode the correspondingly switched buffer container is fluidically coupled to the fluid flow controller and the sterilization medium can be conveyed from this buffer container toward the fluid flow controller based on a pressure applied by the pressure medium. The buffer containers are adapted to be switched alternately.

Verfahren zur Gewinnung von metallischem Titan

Equipment for manufacture of expanded hollow solid profiles having no stress

Vorrichtung zur abdichtung von wandungsdurchbruechen an apparaten, rohrleitungen und armaturen

Die Erfindung betrifft eine Vorrichtung zum Abdichten von Wandungsdurchbruechen an Apparaten, Rohrleitungen, Armaturen und sonstiger Aggregate in allen Industriezweigen und kommunalen Einrichtungen, in denen gasfoermige, fluessige oder feste Medien transportiert, erwaermt, gekuehlt oder Reaktionen unterworfen werden. Dabei soll durch die Abdichtung derartiger Wandungsdurchbrueche eine unplanmaessige Ausserbetriebnahme von Anlagen und Leckageverluste von Energietraegern und Produkten vermieden werden. Erfindungsgemaess besteht die Vorrichtung je nach Einsatzort aus einer Abdichtsegmentaufnahme, an der Masseeintragsvorrichtungen mit Rueckschlagsicherungen sowie Abdichtsegmente in rotationssymmetrischer Ausfuehrungsform oder aus einer Abdichtsegmentaufnahme, an der Masseeintragsvorrichtungen mit Rueckschlagsicherungen sowie Abdichtsegmente in quadratischer und/oder rechteckiger Ausfuehrungsform angeordnet sind.

Abdichtvorrichtung fuer flanschverbindungen an rohrleitungssystemen

Die Erfindung betrifft eine verbesserte Abdichtvorrichtung fuer undichte Flanschverbindungen an Rohrleitungssystemen und Apparaten aller Industriezweige und kommunaler Einrichtungen, in denen gasfoermige, fluessige oder feste Medien transportiert, gekuehlt, erwaermt oder Reaktionen unterworfen werden. Die Vorrichtung ist insbesondere dazu geeignet, an in Betrieb befindliche Anlagen unter havariemaessigen oder erschwerten aeusseren Arbeitsbedingungen eingesetzt zu werden. Bei der erfindungsgemaessen Vorrichtung soll ein universeller Einsatz hinsichtlich den unterschiedlichsten physikalischen und chemischen Parametern des austretenden Mediums des Austrittortes und der Flanscharten erreicht werden. Die erfindungsgemaesse Abdichtvorrichtung ist darauf orientiert, in der Abkammerung einen Druckaufbau der Leckage sowie ein Austreten der Abdichtmasse aus der Abkammerung zu verhindern. Es wurden fuer die unterschiedlichsten Einsatzfaelle hinsichtlich des Flanschdurchmessers und der Flanschspaltbreite verschiedene Querschnittsformen der zur erfindungsgemaessen Vorrichtung gehoerenden Glieder entwickelt, die zu einer Gliederkette zusammengefuegt werden. Fig. 1

Stuetz- und abdichtvorrichtung fuer rohrleitungen

Die Erfindung betrifft eine Stuetz- und Abdichtvorrichtung zur Beseitigung von Undichtheiten und UEberdeckung materialgeschwaechter Teile von Rohrleitungen. Dabei sollen Havariesituationen schnell und risikolos beseitigt werden, um das Stoergeschehen von grosztechnischen Anlagen, hohe volkswirtschaftliche Verluste an Produktion und/oder Energietraegern bzw. Verlust durch entgangene Produktion zu senken. Die Stuetz- und Abdichtvorrichtung wird groszflaechig durch ein die Schadstelle ueberdeckendes Stuetzelement 4 mittels Halteschellen 8 und 9 auf das Rohr befestigt. In der umlaufenden Abdichtkammer 7 des Stuetzelementes 4 ist ein mittels Heftschweiszung befestigtes Streckmetall 11 angeordnet. Die Abdichtmasse 12 wird ueber die Abdichtmasseeintragsbausteine 5 und Eintragskanaele 6 in die Abdichtkammer 7 eingebracht. Fig. 1{Stuetzelement; Abdichtkammer; Halteschellen; Streckmetall; Abdichtmasse; Abdichtmasseeintragsbaustein}

Verwendung von hochfunktionellen, hoch- oder hyperverzweigten polycarbonaten

Usob vyroby koncentrovaneho lakoveho roztoku na bazi chlorpolyetylenu

Koncentrovany roztok laku na bazi chlorovanych polyelefinu

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Abdichtvorrichtung fuer teilfugen an arbeits- und kraftmaschinen

Die Erfindung betrifft eine Abdichtvorrichtung zur Beseitigung von Undichtheiten an Teilfugen von Arbeits- und Kraftmaschinen aller Industriezweige, die insbesondere fuer eine Anwendung, bei Havariesituationen und zur Vermeidung von Stillstandzeiten ohne Ausserbetriebnahme der Arbeits- und Kraftmaschinen geeignet ist. Die Abdichtvorrichtung besteht aus an sich bekannten Abdichtkammerhaelften 5, 6, auf der Abdichtmasseeintragsbausteine mit Rueckschlagsicherungen 7 angeordnet sind und die mittels Spannleisten 10 und Schraubenverbindungen 11 ueber die undichte Teilfuge 1 der Gehaeuseober- und Gehaeuseunterteile 2, 3 verspannt sind. Erfindungsgemaess sind in der Abdichtvorrichtung federnd angebrachte Drucklamellen 12, 13 angeordnet, die die Abdichtvorrichtung in eine innere Abdichtkammer 14, in die ein verlaengerter Abdichtmasseeintragskanal 9 hineinragt und in eine aeussere Abdichtkammer 15, in die ein trichterfoermiger Abdichtmasseeintragskanal 8 muendet, unterteilt, wobei die Abdichtmasseeintragskanaele 8, 9 im Wechsel angeordnet sind. Die Stellung der Drucklamellen 12, 13 ist je nach Abdichtmasseeintrag in die innere Abdichtkammer 14 und in die aeussere Abdichtkammer 15 veraenderlich. Fig. 2

Verfahren zur Herstellung von reinem Silicium

Verfahren zur herstellung von chlorpolyaethylen-lackstammloesungen

Die Erfindung betrifft ein Verfahren zur Herstellung von Chlorpolyaethylen-Lackstammloesungen. Die Aufgabe der Erfindung besteht darin, durch Chlorierung in inerten Loesungsmitteln erhaltene Loesungen auf dem Wege des destillativen Austausches des Loesungsmittels der Chlorierung gegen ein hoehersiedendes Lackloesemittel unter thermisch schonenden Bedingungen aufzuarbeiten. Es wird ein Verfahren vorgeschlagen, nach dem die entsaeuerte Chlorierloesung in der ersten Destillationsstufe bei Temperaturen unter 85 C auf 40 bis 50 % aufkonzentriert, in vorgelegtes Lackloesemittel abgelassen und in einer zweiten Destillationsstufe bei Temperaturen, die etwa 10 C ueber dem Siedepunkt des Lackloesemittels liegen, die restliche Menge des Loesemittels der Chlorierstufe entfernt wird. Die so hergestellten Lackstammloesungen besitzen Thermostabilitaeten, gemessen nach der Kongorotmethode bei 100 C, von mehr als 10 Stunden und fuehren zu Anstrichfilmen von besonders hoher Lebensdauer.

Concentrated lacquer solution based upon chlorinated polyolefines

Lackstammloesung auf der basis von chlorierten polyolefinen

Die Erfindung bezieht sich auf ein Verfahren zur Herstellung von Lackstammloesung auf der Basis von chlorierten Polyolefinen. Ziel der Erfindung ist es, die Qualitaet der Lackstammloesung zu verbessern, insbesondere die Waerme- und Lichtstabilitaet zu erhoehen. Die Aufgabe besteht darin, ein Verfahren zu schaffen, dass der Lackstammloesung unter Verwendung von ungereinigten, bereits zur Chlorierung verwendeten Loesungsmittel und in Gegenwart von in Alpha, Betta-Stellung ungesaettigten Karbonsaeure bzw. deren Anhyriden,eine hervorragende Stabilitaet verleiht,die es gestattet, einen Loesungsmittelaustausch durch Umdestillation durchzufuehren. Als Loesung wird vorgeschlagen, dem zur Chlorierung verwendeten Loesungsmittel und ggf. der entsaeuerten Chlorierung eine im Loesungsmittel loeslich alkalische Substanz zuzugeben. Die Zugabe muss in den Mengen erfolgen, dass eine schwache Basizitaet erreicht wird und die Zugabe der bekannten Stabilisatoren nach der Zugabe der alkalischen Substanz erfolgt. Durch das neue Verfahren werden Lackstammloesungen mit hohen Gebrauchswerteigenschaften hergestellt und die Verfahrensstufe der Feststoffherstellung eingespart. Das fuer die Chlorierung zum Loesen des Polyolefins verwendete Loesungsmittel wird zurueckgewonnen und ohne aufwendigen Reinigungsprozess in dem Verfahren wieder eingesetzt.

Method of concentrated lacquer solution production on base of chlorinated polyolefin

Preparation of polyisocyanates containing iminooxadiazinedione groups and their use

A process for the preparation of polyisocyanates containing iminooxadiazinedione groups, comprising reacting at least one (cyclo)aliphatic diisocyanate in the presence of at least one oligomerization catalyst, and when the reaction has reached a predeterminable degree of con-version, based on the (cyclo)aliphatic diisocyanates, stopping the reaction by addition of at least one catalyst poison for the oligomerization catalyst, wherein the oligomerization catalyst is a salt containing a fluoride or poly(hydrogen)fluoride [F- x (HF) m ] as anion and the catalyst poison is a solution containing at least one alcohol comprising at least 6 carbon atoms as solventand wherein m is a number between 0.01 and 20.

Water-emulsifiable isocyanates with improved properties

Mixture comprising a) at least one polyisocyanate, b) at least one reaction product of at least one polyisocyanate b1) with at least one compound b2) having at least one hydrophilic group which is not reactive toward isocyanate (group A) and precisely one group which is reactive toward isocyanate (group B) and c) at least one solvent of formula (I) or (II) wherein -R1- is -CH2-CH2- or -CH=CH- and wherein R2 and R3 are mutually independently identical or different H radicals or aliphatic, cycloaliphatic, aromatic or araliphatic C1-C10 radicals, which are saturated or unsaturated, linear or branched, optionally substituted and/or interrupted by heteroatoms from the group of oxygen, sulfur and nitrogen.

Removal of monomeric aliphatic diisocyanate in an aliphatic polyisocyanate using scavengers

Device and method for determining the temperature of a heat sink

A method for determining the temperature of a heat source and an electronic unit, including a printed-circuit board equipped with a sensor and a heat sink, the sensor being connected to the heat sink in a heat-conducting manner.

Catalysts for polyurethane coating compounds

The present invention relates to new catalysts for curing solventborne or solvent-free coating compositions, such as 2-component polyurethane coating materials or 2-component polyurethane adhesives.