Preparation method of polyurethane macromonomer modified emulsion-type thickening agent

The invention discloses a preparation method of a polyurethane macromonomer modified emulsion-type thickening agent. The preparation method comprises the following steps of: preemulsifying methacrylic acid, (methyl) acrylate and an associated monomer; preparing an initiator and a posttreatment solution; adding deionized water to a reaction vessel, sequentially adding an emulsifying agent and the initiator while stirring, heating to 80-90 DEG C, simultaneously dropwise adding mixed raw materials and an initiator solution to the reaction vessel at a constant speed after 5-10 minutes, finishing the dropwise adding within 2.5-3h, and preserving the temperature for 10-60 minutes; and dropwise adding the posttreatment solution, cooling to below 40 DEG C, and discharging after a qualification result is obtained through detection. The product prepared by adopting the preparation method disclosed by the invention solves the uniformity problem of a copolymer structure because BEM (Docosyl Alcohol ...

Process for synthesis of alternating isobutene-maleic anhydride resin

Synthetic method of reactive emulsifier

The invention discloses a synthetic method of a reactive emulsifier, which comprises the following steps: adding a hydroxyl-contained emulsifier, a carboxyl-contained unsaturated monomer, a dehydrating agent, a polymerization inhibitor, a catalyst and the like into a reaction kettle at room temperature, wherein the molar ratio of the hydroxyl-contained emulsifier to the carboxyl-contained unsaturated monomer is 1:1 to 2; then heating to reflux temperature, and controlling the reflux speed to enable the reflux speed to be smaller than 1 drop/second; heating to the temperature of 120 to 190 DEG C step by step, preserving heat for 1 to 2 hours, and measuring a hydroxyl value to be qualified; and finally cooling to the temperature of lower than 45 DEG C, and discharging to obtain the reactive emulsifier. The synthetic method of the reactive emulsifier of the invention has fewer steps and simple operation, is applicable for the method for synthesizing the reactive emulsifier through raw materials ...

Ultra-fine full vulcanized powdered styrene-butadiene rubber (UFPSBR) and solution polymerized styrene-butadiene rubber (SSBR) blend tread rubber and manufacturing method thereof

The invention provides an ultra-fine full vulcanized powdered styrene-butadiene rubber (UFPSBR) and solution polymerized styrene-butadiene rubber (SSBR) blend tread rubber and a manufacturing method thereof, relating to a rubber and a manufacturing method thereof. The blend tread rubber is characterized in that the formula of the blend tread rubber comprises the following materials in parts by weight: 100 parts of SSBR blend, 50 parts of carbon black N234, 10 parts of white carbon black, 0-0.8 part of coupling agent Si69, 0-5 parts of UFPSBR, 1.5-2.2 parts of sulfur, 1.5-1.8 parts of accelerating agent CZ, 3 parts of coumarone indene resin, 10 parts of aromatic oil, 2 parts of anti-aging agent 4010NA, 1.5 parts of stearic acid, 5 parts of zinc oxide and 1 part of liquid paraffin. The invention has the following beneficial effects: the ideal raw material function combination is obtained by adding UFPSBR to the formula of the tread rubber; The wear resistance, the wet skid resistance and ...

Preparation method of hyperbranched dispersant

The invention discloses a preparation method of a hyperbranched dispersant. The preparation method comprises the following steps: preparing a solution containing (methyl) acrylic acid (ester), active substances, and hydrophobic macro-monomers for later use; preparing an oxidation-reduction initiator solution for later use; heating water to a temperature of 80 to 85 DEG C, adding 10 to 30% of the initiator solution into the water, after 5 to 10 minutes, simultaneously dropwise adding the mixed raw material solution and the rest initiator solution into the water; heating the mixed solution to a temperature of 85 to 90 DEG C, keeping the temperature for 1 to 1.5 hours; cooling to 40 DEG C or less, carrying out neutralization reactions, controlling the temperature below 50 DEG C at the same time, detecting the reaction product, and finally discharging the product if the product meets related standards. The hyperbranched dispersant is an aqueous dispersant, has the characteristics of environment-friendliness ...

Preparation method of emulsion-type thickening agent

The invention relates to a preparation method of an emulsion-type thickening agent. The preparation method comprises the following steps of raw material pretreatment, initiator solution preparation, aftertreatment solution preparation, polymerization and other follow-up treatment processes. Compared with the prior art, the preparation method utilizes a starved polymerization technology to prepare the emulsion-type thickening agent so that copolymer structure homogeneity is realized; the ammonia ester bond has hydrolysis resistance superior to that of an ester bond and the appropriate temperature and initiator are selected so that the emulsion-type thickening agent has good thickening properties and stability; the emulsion-type thickening agent is a novel aqueous thickening agent and has characteristics of environmental friendliness, good safety and excellent performances; and the preparation method has simple processes and can be realized easily.

Synthesis method of polyurethane-type macromonomer

The invention discloses a synthesis method of polyurethane-type macromonomer, comprising the steps of: adding polyether into a reactor, and heating; adding IPDI at the temperature below 55 DEG C, and raising the temperature to 90-100 DEG C; adding T12, and carrying out heat preservation for 2.5-3h; measuring the content of NCO until hydroxyl reaction is fully carried out; lowering the temperature to be lower than 55 DEG C, adding polymerization inhibitor, and stirring for 5-7min; adding fatty alcohol and acrylic esters resin at the temperature below 55 DEG C, raising the temperature to 90-120 DEG C, adding T12 and carrying out heat preservation for 2-4h; measuring the content of NCO until the content can not be measured; and lowering the temperature to be lower than 50 DEG C, discharging, and obtaining the polyurethane-type macromonomer, wherein the mass ratio among the polyether, IPDI, T12, fatty alcohol, acrylic esters resin and polymerization inhibitor is 100:10-210:5-90:3-55:0.1-0.5 ...

Synthetic method of reactive emulsifier

The invention discloses a synthetic method of a reactive emulsifier, which comprises the following steps: adding a hydroxyl-contained emulsifier, a carboxyl-contained unsaturated monomer, a dehydrating agent, a polymerization inhibitor, a catalyst and the like into a reaction kettle at room temperature, wherein the molar ratio of the hydroxyl-contained emulsifier to the carboxyl-contained unsaturated monomer is 1:1 to 2; then heating to reflux temperature, and controlling the reflux speed to enable the reflux speed to be smaller than 1 drop/second; heating to the temperature of 120 to 190 DEGC step by step, preserving heat for 1 to 2 hours, and measuring a hydroxyl value to be qualified; and finally cooling to the temperature of lower than 45 DEG C, and discharging to obtain the reactiveemulsifier. The synthetic method of the reactive emulsifier of the invention has fewer steps and simple operation, is applicable for the method for synthesizing the reactive emulsifier through raw materials ...

Method for preparing mineral oil defoamer

The invention discloses a method for preparing a mineral oil defoamer, which comprises the following steps: adding mineral oil defoamer in a reactor, adding a polyether, white carbon black, an emulsifier and oleic acid in turn with stirring; stirring till the system is basically dispersed uniformly, heating till the system is basically transparent and keeping temperature for 1 to 2 hours; cooling to below 45 DEG C, transferring to a sand mill, grinding (by 1 to 2-millimeter zirconium beads) and dispersing for 1 to 2 hours; and discharging after the defoamer is tested to be qualified and thus, obtaining the mineral oil defoamer. In the method for preparing the mineral oil defoamer, when a proper polyether or modified polyether variety is selected, the prepared mineral oil defoamer has high dispersing and defoaming effects and high stability; the prepared mineral oil defoamer is a novel aqueous defoamer, has the characteristics of environmental protection, safety, high performance and the ...

Method for preparing composite adhesive

The invention discloses a method for preparing a composite adhesive. The preparation method comprises the following steps: firstly, preparing aqueous solution with a certain concentration from polyvinyl alcohol and/or casein in a first container, wherein the concentration range of the aqueous solution is between 5 and 30 percent; then adding waterborne acrylic emulsion into a second container and stirring the emulsion for 5 to 10 minutes; under the stirring condition, slowly adding waterborne polyurethane resin into the second container; adding the prepared aqueous solution of the polyvinyl alcohol and/or the casein into the second container and continuously stirring the mixture for 0.8 to 1.5 hours; and finally detecting the obtained product and discharging to obtain the composite adhesive. The method for preparing the composite adhesive of the invention has few steps and simple operation. The composite adhesive can form a film under the gradient of over 0 DEG C by compounding various ...

Method for preparing strong water absorbent

A process for preparing strong water-absorbing agent from maleic anhydride as main raw material features that under the action of initiator and cross-linking agent and through polymerization, hydrolysis and cross linking, maleic anhydride is copolymerized with a monomer with double bond. Said strong water-absorbing agent features high absorption speed, good weatherability and high acid and hig h temp resistances.

Preparation method of mineral oil defoaming agent

The invention discloses a preparation method of a mineral oil defoaming agent, comprising the following steps: adding mineral oil to a reaction container; adding wax, white carbon black, an emulsifying agent and oleic acid in sequence when dispersing at a high speed; after finishing adding, dispersing until the system is basically and uniformly dispersed at a high speed; turning to a colloid grinder and grinding and dispersing for 4-6 times; checking; and after the material is qualified, discharging the material. In the preparation method of a mineral oil defoaming agent in the invention, a proper variety of wax or modified wax is selected so that the mineral oil defoaming agent has perfect dispersing and defoaming effects and storage stability; the prepared mineral oil defoaming agent is a novel water defoaming agent, and has the characteristics of environmental protection, safety, excellent performance, and the like; the preparation method perfects the sorts of the products in the domestic ...

Method for synthesizing multi-crosslinked monomer

The invention discloses a method for synthesizing a multi-crosslinked monomer. The method comprises the steps of adding dehydrated (meth) hydroxyethyl (or hydroxypropyl) acrylate into a reactor, adding a polymerization inhibitor and stirring for 5-10 minutes; adding isocyanate at the temperature below 35 DEG C, heating to the temperature of 70-90 DEG C, adding T12, and carrying out heat preservation for 2-3 hours; measuring the content of NCO until hydroxy reaction is completed; adding dehydrated beta-hydroxyalkylamide while stirring, adding T12 0.5 hour later, and carrying out heat preservation for 3-4 hours at the temperature of 90-100 DEG C; measuring the content of NCO until NCO can not be measured; cooling to the temperature below 50 DEG C, and discharging, thereby obtaining the multi-crosslinked monomer. The method has the advantages of few steps, simplicity in operation, easiness in implementation, small equipment investment and economic feasibility; the variety of crosslinkers is ...

Preparation method of dispersant

The invention discloses a preparation method of a dispersant. The method comprises the following steps: preparing acrylamide solution, adding at least one of molten acrylic acid or methacrylic acid, stirring the mixture to add in a constant pressure funnel; preparing initiator solution to add in another constant pressure funnel; adding water in a reaction container, heating to 80-90 DEG C, adding 10% of the standby initiator solution; after 5-10 minutes, dropping the standby raw material solution in the constant pressure funnel and the residual initiator solution in constant speed simultaneously; heating to 90-100 DEG C, keeping the temperature for 1.5-2 hours; reducing the temperature to less than 50 DEG C, dropping alkali liquor to perform neutralization, controlling the temperature to be less than 50 DEG C; and testing to ensure that the product is qualified, and discharging. The dispersant prepared by the method is a new waterborne dispersant, is characterized by environmental friend ...

Method for preparing mineral oil defoamer

The invention discloses a method for preparing a mineral oil defoamer, which comprises the following steps: adding mineral oil defoamer in a reactor, and adding polylol stearic acid ester, white carbon black and an emulsifier in turn with stirring; stirring till the system is basically distributed uniformly, heating till the system is basically transparent, and keeping temperature for 1 to 2 hours; cooling to below 45 DEG C, transferring into a sand mill, and grinding ( by 1 to 2-millimeter zirconium beads) and dispersing for 1 to 2 hours; and discharging after the defoamer is tested to be qualified and thus, obtaining the mineral oil defoamer. In the method for preparing the mineral oil defoamer, which is disclosed by the method, when a proper polylol or modified polylol variety is selected, the prepared mineral oil defoamer has desirable dispersing and defoaming effects; the prepared mineral oil defoamer is novel aqueous defoamer and has the characteristics of environmental protection ...

Ultrafine fully-vulcanized powdered styrene butadiene rubber tread rubber and manufacturing method thereof

The invention discloses ultrafine fully-vulcanized powdered styrene butadiene rubber tread rubber and a manufacturing method thereof. The tread rubber consists of the following materials in part by mass: 100 parts of tread rubber, 0 to 10 parts of ultrafine fully-vulcanized powdered styrene butadiene rubber (UFPSBR), 50 parts of carbon black, 1 part of accelerator CZ, 2.5 parts of anti-aging agent 4010NA, 3 parts of stearic acid, 5 parts of zinc oxide, 1.8 to 2.5 parts of sulfur, 6 parts of aromatic oil and 1 part of liquid wax. The manufacturing method comprises: adding the ultrafine fully-vulcanized powdered styrene butadiene rubber (UFPSBR) into three common tread rubber systems; and pretreating the UFPSBR by using silane coupling agent KH550 and saturated saline solution respectively. As the UFPSBR is used in the formula of the formula of tread rubber, high-performance tires can be produced and the application range of the UFPSBR is enlarged.

Method for preparing self-plasticizing monomer

The invention discloses a method for synthesizing a self-plasticizing monomer. The method comprises the followings steps: adding a polymerization inhibitor into unsaturated monoacid, performing complete dissolution and aging for 12 hours, then using the mixture, adding methylbenzene, hydroxy compounds, monoacid and the like into a reactor, and simultaneously stirring and heating to 80 DEG C, and adding p-toluenesulfonic acid and other catalysts for dehydration and esterification: performing heat preservation for 1 hour at 115-125 DEG C, performing heat preservation for 0.5-1 hour for every heating for 10 DEG C, heating to 140-180 DEG C until water is not produced basically, then staring to perform heat preservation and vacuum pumping to remove unreacted monoacid and methylbenzene, wherein the operation time is 1-3 hours; after the completion of removal, quickly cooling to a temperature of 50 DEG C below, and discharging, so that the self-plasticizing monomer is obtained. The method has ...

Synthetic method of polyether-isotridecanol monoester

The invention discloses a synthetic method of polyether-isotridecanol monoester, and the method comprises the following steps: adding isotridecanol, carboxylic binary acid monomers, a dehydrating agent and a catalyst into a reaction container for carrying out esterification, and obtaining ester; further cooling the ester to below 45 DEG C; adding polyether into the cooled ester, adding the dehydrating agent and the catalyst, then heating up, refluxing, and gradually heating up to 120-190 DEG C; keeping the temperature for 1-2h, and measuring the acid value during the temperature-keeping reaction process till the carboxyl reaction is complete; and cooling to below 45 DEG C, and obtaining the polyether-isotridecanol monoester, wherein the molar ratio of isotridecanol: carboxylic binary acid monomers: polyether is 1-1.05:1:1-1.05. The synthetic method has the advantages of few steps, simple operation, easy realization of industrial production, low equipment investment, economy and feasibility ...

Wire take-up device for fine stretching machine

The invention relates to the field of fine and soft copper wires, in particular to a wire take-up device for a fine stretching machine. The wire take-up device for the fine stretching machine comprises a shaft trunk and a roller which sleeves the shaft trunk, a shaft seat is mounted at one end of the shaft trunk, a cover board is mounted at each of two ends of a shaft hole of the roller, the cover board is round, a round cover board hole is formed in the middle of the cover board, a shaft sleeve sleeves the shaft trunk, and a compression nut is arranged at the end of the shaft trunk. The shaft hole aperture of the roller is changed through the cover boards and the shaft sleeve so that the roller can be firmly mounted on the shaft trunk with small diameter in a sleeve mode; by means of the structure, the roller is suitable for different shaft trunks; through using the shaft trunk which is the same with that of a pay-off system of the later stage, the shaft reversing procedure is omitted.

Synthetic method for dihydric alcohol-isomeric tridecanol diester

The invention discloses a synthetic method for dihydric alcohol-isomeric tridecanol diester, comprising the following steps of: adding a dihydric alcohol, a diacid monomer containing carboxyl and a dehydrant and a catalyst in a reaction container for esterification to obtain an esterified substance; then cooling the esterified substance to a temperature below 45 DEG C; adding the isomeric tridecanol in the cooled esterified substance, adding the dehydrant and the catalyst, then raising the temperature for reflux, gradually raising the temperature to 120-190 DEG C; maintaining the temperature 1-2 hours, measuring hydroxyl value in the process of temperature maintaining reaction till the hydroxyl is fully reacted; cooling to a temperature below 45 DEG C to obtain the diester, wherein the mol ratio of the isomeric tridecanol to the diacid monomer containing carboxyl to the dihydric alcohol is 1-1.1:1:0.5-0.495. The invention has the advantages of less steps, simple operation, easy implementation ...

Preparation method of water-resistant building emulsion

The invention discloses a preparation method of a water-resistant building emulsion. The method comprises the following steps: pre-emulsifying styrene, (meth)acrylic acid, (meth)acrylic acid (ester), a self-plasticizing monomer and an emulsifying agent; preparing an initiator solution; adding water and an emulsifying agent into a reactor, heating to 75-80 DEG C, and quickly adding 20-50 percent of a polymerization initiator solution; dropwise adding the mixed raw materials and the polymerization initiator solution 5-10 minutes later, stopping adding after 70-90 percent of the mixed raw materials are added, adding a silane coupling agent unsaturated monomer, continuing dropwise adding, and preserving heat; after dropwise adding, treating the initiator solution, and preserving heat; cooling till the temperature is below 40 DEG C, adjusting the pH to 7-9, inspecting and discharging. According to the method, the reactive emulsifying agent, the self-plasticizing monomer, the silane coupling ...

Cross-country all steel truck radical tire tread rubber and preparation method thereof

The invention discloses cross-country all steel truck radical tire tread rubber and a preparation method thereof. The cross-country all steel truck radical tire tread rubber comprises the following components in parts by weight: 100 parts of natural rubber, 0-0.3 part of a peptizer, 30-50 parts of carbon black, 7-18 parts of white carbon black, 1-4 parts of a silane coupling agent, 3-5 parts of zinc oxide, 1-3 parts of stearic acid, 0.5-2 parts of protecting wax, 0.5-3 parts of a plasticizer A, 0.5-2.5 parts of an anti-aging agent 6PPD, 0.5-2 parts of an anti-aging agent RD, 1-2.5 parts of sulfur, 1-3 parts of an accelerant and 0-0.3 part of a scorch retarder. With the adoption of the carbon black and the white carbon black, the wear resistance and tear resistance of the tread can be guaranteed, and the tread rubber has low heat generation; and moreover, the cross-country all steel truck radical tire tread rubber disclosed by the invention has the advantages of high wear resistance, tear ...

Process for synthesis of alternating isobutene-maleic anhydride resin

A process for synthesizing alternative isobutylene-maleic anhydride resin features that under the action of initiator, the ethylene in mixed C4 as main raw material is copolymerized with maleic anhydride at certain temp and pressure to obtain the copolymer resin. Its advantages are smooth reaction and effective control of molecular weight.

High- and low-molecular composite dispersants as well as preparation method and application thereof

The invention discloses a preparation method for high- and low-molecular composite dispersants, which comprises the following steps of: adding a low-molecular dispersant into a reactor, slowly adding a high-molecular dispersant while stirring, continuing to stir and react for 20-60 minutes after finishing the adding, and discharging after detecting to be qualified to obtain the high- and low-molecular composite dispersants, wherein the mass ratio of the low-molecular dispersant to the high-molecular dispersant is 1000:(375-450). The preparation method for the high- and low-molecular composite dispersants disclosed by the invention has a simple process, is easy to realize large-scale production, has less equipment investment and is economically feasible; and the high- and low-molecular composite dispersants produced by adopting the method has a good dispersing effect and cannot be changed after being stored for about two years.

Method for preparing mineral oil defoamer

The invention discloses a method for preparing a mineral oil defoamer, which comprises the following steps: adding mineral oil defoamer in a reactor, adding stearate or modified stearate, white carbon black and an emulsifier in turn with stirring; stirring till the system is basically dispersed uniformly, heating till the system is basically transparent, and keeping temperature for 1 to 2 hours; and cooling to below 45 DEG C, transferring to a sand mill, and grinding ( by 1 to 2-millimeter zirconium beads) and dispersing for 1 to 2 hours, discharging after the defoamer is tested to be qualified and thus, obtaining the mineral oil defoamer. In the method for preparing the mineral oil defoamer, when a proper stearate or modified stearate variety is selected, the prepared mineral oil defoamer has desirable dispersing and defoaming effects; the prepared mineral oil defoamer is a novel aqueous defoamer, has the characteristics of environmental protection, safety, high performance and the like ...

All-steel load radial tire tread base rubber material and preparation method thereof

The invention relates to an all-steel load radial tire tread base rubber material and a preparation method thereof. The base rubber material comprises the following raw materials in parts by weight: 100 parts of natural rubber, 0-0.3 part of a peptizer, 30-45 parts of carbon black, 7-18 parts of white carbon black, 1-4 parts of a silane coupling agent, 3-5 parts of zinc oxide, 1-3 parts of stearic acid, 1-3 parts of phenolic tackifying resin, 0.5-3 parts of petroleum resin, 0.5-2 parts of an anti-aging agent 6PPD, 0.5-2 parts of an anti-aging agent RD, 1-3 parts of sulfur, 0.8-3 parts of an accelerator and 0-0.3 part of a scorch retarder. Petroleum resin is added to improve the medium-term and long-term viscidity of a tire tread half member so that the tread is well bonded with belt layers during molding and the phenomenon of delamination of a tread crown is improved. The material disclosed by the invention has the advantages of good thermal resistance and aging resistance, low heat generation ...

Preparation method of double self cross-linking elastic emulsion

The invention discloses a preparation method of a double self cross-linking elastic emulsion. The method combines two post cross-linking modes: (1) adding multivalent metal ion compounds to carry out cross-linking reactions; (2) adding diacetone acrylamide into emulsion so as to make diacetone acrylamide participate in the emulsion copolymerization reactions during the emulsion polymerization process so as to introduce keto-carbonyl groups into the chains of copolymer, and then adding binary caprylic hydrazide such as adipic dihydrazide into the emulsion so as to obtain the self cross-linking elastic emulsion. A diacetone-acrylamide and binary caprylic hydrazide cross-linking system and a carboxylic acid and multivalent metal salt cross-linking system are both simultaneously induced into an acrylate emulsion polymerization system to replace an elastic emulsion system formed trough a single reactive cross-linking agent; thus the polymerization property and storage stability of emulsion are ...

Synthetic method of polyether-isotridecanol monoester

The invention discloses a synthetic method of polyether-isotridecanol monoester, and the method comprises the following steps: adding isotridecanol, carboxylic binary acid monomers, a dehydrating agent and a catalyst into a reaction container for carrying out esterification, and obtaining ester; further cooling the ester to below 45 DEG C; adding polyether into the cooled ester, adding the dehydrating agent and the catalyst, then heating up, refluxing, and gradually heating up to 120-190 DEG C; keeping the temperature for 1-2h, and measuring the acid value during the temperature-keeping reaction process till the carboxyl reaction is complete; and cooling to below 45 DEG C, and obtaining the polyether-isotridecanol monoester, wherein the molar ratio of isotridecanol: carboxylic binary acidmonomers: polyether is 1-1.05:1:1-1.05. The synthetic method has the advantages of few steps, simple operation, easy realization of industrial production, low equipment investment, economy and feasibility ...

Method for preparing hydrophobic macromonomer carboxylic acid dispersing agent

The invention discloses a method for preparing a hydrophobic macromonomer carboxylic acid dispersing agent. The method comprises the following steps of: preparing (methyl) acrylic acid (ester) and hydrophobic macromonomer solution for later use; preparing initiator solution for later use; adding water into a reaction vessel; heating to 80 to 90 DEG C; adding 10 percent of spared initiator solution; after 5 to 10 minutes, adding the spared mixed raw material solution and the residual initiator solution in a constant-pressure dropping funnel into the reaction vessel dropwise at constant speed at the same time; heating to 90 to 100 DEG C; preserving the heat for 1.5 to 2 hours; cooling to below 50 DEG C; neutralizing by adding alkali liquor dropwise and controlling the temperature to be below 50 DEG C; and discharging after the dispersing agent is qualified through detection. The dispersing agent prepared by the method is a water-based dispersing agent, has the characteristics of environmental ...

Preparation method of alkali-resistant emulsion

The invention discloses a preparation method of an alkali-resistant emulsion. The preparation method comprises the following steps: carrying out a pre-emulsification treatment on styrene, (methyl) acrylic acid, (methyl) acrylic ester and an emulsifier; preparing an initiator solution; adding water into a reactor, adding part of the emulsifier into the reactor under stirring, heating to a temperature of 75 to 85 DEG C, rapidly adding a polymerization initiator water solution with a concentration of 20 to 50% into the reactor; simultaneously dropwise adding the pre-emulsified mixed raw materials and the initiator solution into the reactor after 5 to 10 minutes, wherein the pre-emulsified mixed raw materials and the initiator solution should be completely added into the reactor within 3 to 4 hours, and the temperature is controlled at a range of 82 to 88 DEG C during the process; maintaining the temperature for 30 to 60 minutes after the addition of raw materials and initiator solution; dropwise ...

Synthetic method of pesticide emulsifier hydrophobic monomers

The invention discloses a synthetic method of pesticide emulsifier hydrophobic monomers, which comprises the following steps: dissolving dehydrated toluene and pesticide emulsifiers in a reactor, adding isocyanate at a temperature below 35 DEG C, heating to 80-100 DEG C, adding T12, performing heat preservation for 2.5-3 hours; determining the content of NCO till hydroxy is reacted completely; cooling to below 40 DEG C, adding a polymerization inhibitor, stirring for 5-10 min; adding (methyl) acrylate monomers containing hydroxy or amido at below 40 DEG C, heating to 70-90 DEG C, adding T12, performing heat preservation for 2-4 hours; determining the content of NCO till no NCO can be determined; removing toluene under a vacuum condition, cooling to below 80 DEG C, dissolving with water, continuing to cool to below 40 DEG C, and discharging to obtain the pesticide emulsifier hydrophobic monomers. The synthetic method of pesticide emulsifier hydrophobic monomers of the invention is few in ...

Method for preparing emulsified silicone oil defoamer

The invention discloses a method for preparing emulsified silicone oil defoamer, which comprises the following steps: adding water into a reactor, heating to 50 to 90 DEG C, and adding an emulsifier to prepare reaction solution A; stirring the silicone oil and white carbon black till the system is basically dispersed uniformly, and heating to 50 to 90 DEG C to prepare reaction solution B; mixing the reaction solution A and the reaction solution B, heating to 50 to 90 DEG C, adding a certain amount of water under high-speed dispersion, and keeping temperature for 1 to 2 hours; cooling to below 45 DEG C, and emulsifying and dispersing for 1 to 2 hours; and detecting, discharging if the product is qualified and thus, obtaining the discharging after the defoamer is tested to be qualified and thus, obtaining the mineral oil defoamer. In the method for preparing emulsified silicone oil defoamer, which is disclosed by the invention, a proper silicone oil or modified silicone oil variety is selected ...

Solvent-free polyacrylate synthesis system and synthesis method thereof

The invention discloses a solvent-free polyacrylate synthesis system which comprises a reaction kettle, a mixing plate capable of moving up and down is arranged in the reaction kettle, a plurality of through mixing holes are formed in the mixing plate, and a scraper capable of rotating and used for scraping impurities at the bottom is arranged in the reaction kettle. The vertical movement of the mixing plate is matched with the mixing holes, so that the materials can penetrate through the mixing holes at a certain flow speed through extrusion while the mixing plate moves up and down, the materials in the reaction kettle can be fully and uniformly mixed, and the overall production efficiency is improved; the deposition of impurities at the bottom of the reaction kettle can be effectively prevented, so that the reaction is more thorough; the device overcomes the defects in the prior art, is reasonable in design and compact in structure, and has high social use value and application prospects ...

Annealing contact wheel of continuous annealing machine for stretched thin annealed copper wires

The invention relates to the field of wire drawing of stretched thin annealed copper wires and particularly relates to an annealing contact wheel of a continuous annealing machine for stretched thin annealed copper wires. The annealing contact wheel comprises a rear fixed seat, a front fixed cover fixedly connected with the rear fixed seat, and an annealing ring between the rear fixed seat and the front fixed cover, wherein an axis hole by which the rear fixed seat is installed on a machine body is formed at the center of the rear fixed seat, the rear fixed seat, the front fixed cover and the annealing ring are circular, the annealing ring is a closed ring, and the annealing ring comprises a copper ring and a nickel-plated layer from inside to outside. The annealing contact wheel has the advantages that the structure is simple, the annealing ring can be mounted conveniently, the production efficiency can be greatly improved, and the copper wire is hardly scratched.

Method for preparing low-molecular-weight carboxylic acid dispersing agent in redox system

Synthesis method of star-like hydrophobic dispersant

The invention discloses a synthesis method of a star-like hydrophobic dispersant. The method comprises the following steps: adding toluene, a surfactant, and binary acid such as o-phthalic acid into a reactor, heating to a temperature of 80 DEG C under stirring, adding a catalyst, gradually heating to a temperature of 120 to 180 DEG C, maintaining the temperature for 2 to 4 hours, measuring the hydroxyl value until the hydroxyl groups are totally used up; cooling to a temperature of 80 DEG C, adding polyhydroxy compounds, toluene, and a catalyst, gradually heating to a temperature of 120 to 190 DEG C, maintaining the temperature for 2 to 4 hours, measuring the hydroxyl value, keeping on carrying out the reactions until the hydroxyl groups are totally used up; rapidly cooling to a temperature of 70 to 100 DEG C after the reactions are over, and finally discharging the reaction product so as to obtain the star-like hydrophobic dispersant; wherein the mole ratio of the surfactant to binary ...

Preparation method of dispersant

The invention discloses a preparation method of a dispersant. The method comprises the following steps: preparing acrylamide solution, adding at least one of molten acrylic acid or methacrylic acid, stirring the mixture to add in a constant pressure funnel; preparing initiator solution to add in another constant pressure funnel; adding water in a reaction container, heating to 80-90 DEG C, adding10% of the standby initiator solution; after 5-10 minutes, dropping the standby raw material solution in the constant pressure funnel and the residual initiator solution in constant speed simultaneously; heating to 90-100 DEG C, keeping the temperature for 1.5-2 hours; reducing the temperature to less than 50 DEG C, dropping alkali liquor to perform neutralization, controlling the temperature to be less than 50 DEG C; and testing to ensure that the product is qualified, and discharging. The dispersant prepared by the method is a new waterborne dispersant, is characterized by environmental friend ...

Method for preparing low-molecular-weight carboxylic acid dispersing agent in redox system

The invention discloses a method for preparing a low-molecular-weight carboxylic acid dispersing agent in a redox system. The method comprises the following steps of: preparing (methyl) acrylic acid and acrylic ester solution; preparing initiator solution; preparing reducing agent solution; adding the (methyl) acrylic acid and acrylic ester solution, the initiator solution and the reducing agent solution into a constant-pressure dropping funnel respectively for later use; adding water into a reaction vessel; heating to 60 to 80 DEG C; adding 10 percent of spare initiator solution; adding all the spared solution into the reaction vessel at the same time; heating to 70 to 85 DEG C; preserving the heat for 1.5 to 2 hours; cooling to below 50 DEG C; neutralizing by adding alkali liquor dropwise and controlling the temperature to be below 50 DEG C; and discharging after the dispersing agent is qualified through detection. The low-molecular-weight dispersing agent is obtained by using an initiator ...

Preparation method of emulsion-type thickening agent

The invention relates to a preparation method of an emulsion-type thickening agent. The preparation method comprises the following steps of raw material pretreatment, initiator solution preparation, polymerization and other follow-up treatment processes. Compared with methods in the prior art, the preparation method utilizes a starved polymerization technology to prepare the emulsion-type thickening agent so that copolymer structure homogeneity is realized; the ammonia ester bond has hydrolysis resistance superior to that of an ester bond and the appropriate temperature and initiator are selected so that the obtained emulsion-type thickening agent has good thickening properties and stability; the emulsion-type thickening agent is a novel aqueous thickening agent and has characteristics of environmental friendliness, good safety and excellent performances; and the preparation method has simple processes and can be realized easily.

Production method of water-based polyacrylate dispersion

The invention discloses a production method of a water-based polyacrylate dispersion, which comprises the following steps: adding quantitative ammonium persulfate, tert-butyl hydroperoxide, ascorbic acid and pure water into a dropwise adding tank, stirring for 30 minutes at room temperature, and pumping into the dropwise adding tank by using a magnetic pump for later use to obtain an initiator; sequentially inputting methacrylic acid, acrylic acid, ethyl acrylate, styrene, vinyl acetate, methyl methacrylate, 2-iso-octyl acrylate, acrylamide, n-butyl acrylate and pure water into a special premixing kettle by using a magnetic pump through a pipeline, stirring for 60 minutes at room temperature, and sufficiently and uniformly mixing to prepare raw materials for later use; the preparation method comprises the following steps: inputting a certain amount of a surfactant and pure water into a polymerization kettle through a pipeline by using a magnetic pump, opening a jacket steam valve while ...

Organic-inorganic composite dispersing agent as well as preparation method and application thereof

The invention discloses an organic-inorganic composite dispersing agent as well as a preparation method and application thereof. The preparation method comprises the following steps of: adding water into a reactor, then adding an inorganic dispersing agent, raising the temperature to be 75 DEG C, adding EDTA (Ethylene Diamine Tetraacetic Acid) for reaction till the dissolving is complete to form a transparent and uniform solution, and reducing the temperature to be below 30 DEG C for later use; adding an organic dispersing agent into another reactor, then adding 32% liquid caustic soda, adjusting the pH value of the solution to be more than or equal to 8.5, adding the solution for later use, carrying out reaction for 30-40 minutes, after a product is inspected to be qualified, reducing the temperature to be below 40 DEG C, discharging and obtaining the organic-inorganic composite dispersing agent, wherein the mass ratio of the water to the inorganic dispersing agent to the EDTA to the organic ...

Preparation method of maleic anhydride-(meth)acrylic acid dispersant

The invention discloses a preparation method of a maleic anhydride-(meth)acrylic acid dispersant. The method comprises the following steps: preparing (meth)acrylic acid and acrylate solution, stirring to add in a constant pressure funnel for standby; preparing initiator solution to add in another constant pressure funnel; adding water in a reaction container, heating to 80-90 DEG C, adding 10% of the standby initiator solution; after 5-10 minutes, dropping the standby raw material solution in the constant pressure funnel and the residual initiator solution in constant speed simultaneously; heating to 90-100 DEG C, keeping the temperature for 1.5-2 hours; reducing the temperature to less than 50 DEG C, dropping alkali liquor to perform neutralization, controlling the temperature to be less than 50 DEG C; and testing to ensure that the product is qualified, and discharging. The dispersant prepared by the method is a new waterborne dispersant, is characterized by environmental friend, safety ...

Solvent-free polyester synthesis system and synthesis method thereof

The solvent-free polyester synthesis system comprises a raw material tank, an esterification kettle and a reaction kettle, the raw material tank, the esterification kettle and the reaction kettle are sequentially connected through pipelines, a rotatable stirring shaft is arranged in the reaction kettle, a plurality of stirring rods are arranged on the stirring shaft, and the stirring rods are connected with the raw material tank. And cooling liquid for cooling is arranged in the stirring rod. Through the design of the stirring shaft, the stirring rod and the cooling liquid, the material in the reaction kettle can be quickly cooled by virtue of a manner of cooling the interior of the material and rotation of the stirring rod, so that the overall production efficiency is improved; the device overcomes the defects in the prior art, is reasonable in design and compact in structure, and has high social use value and application prospects.