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33results about How to "Strong steric hindrance effect" patented technology
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Anionic-nonionic complex gasified coal water slurry additive
InactiveCN102031168AImprove hydrophilicityImprove efficiencyLiquid carbonaceous fuelsGranular/pulverulent flues gasificationCoal waterSulfonate
The invention provides an anionic-nonionic complex gasified coal water slurry additive. The additive is prepared by mixing the following components in part by mass uniformly: 21 to 41 parts of anionic dispersant lignosulfonate, 20.5 to 47.4 parts of anionic dispersant naphthalene sulfonate formaldehyde condensate, 5.3 to 10.3 parts of nonionic dispersant oxirane and poxypropane segmented copolymer, 21 to 25.6 parts of hole plugging agent, and 2.6 to 5.3 parts of acid-base regulator, wherein a composition of the anionic dispersant lignosulfonate, the naphthalene sulfonate formaldehyde condensate, and the nonionic dispersant oxirane and poxypropane segmented copolymer has unique synergistic property, so the synergistic effect of learn strong points to offset weakness can be played.
Owner:水煤浆气化及煤化工国家工程研究中心
Preparation method of viscosity reducing type polycarboxylic acid water reducing agent
ActiveCN108264619AAvoid it happening againAvoid the disadvantages of chlorination only according to the number of hydroxyl groupsAcid waterDouble bond
The invention provides a preparation method of a viscosity reducing type polycarboxylic acid water reducing agent. The obtained water reducing agent is good in viscosity reducing effect, excellent inwater reducing performance, outstanding in moisture retention performance and better in peaceability. The preparation method of the viscosity reducing type polycarboxylic acid water reducing agent comprises the following steps of (1), preparation of a comonomer of a polycarboxylic acid group structure, wherein firstly, chlorinated polyether of a specific structure and an aminating agent of a specific structure are subjected to an amination reaction to obtain aminated polyether, and after purification, aminated polyether and unsaturated carboxylic acid ester of a specific structure are subjected to an addition reaction of a C=C double bond under the action of a catalyst to synthesize a comonomer having the comonomer of the polycarboxylic acid group structure; (2) polymerization, wherein thecomonomer of the polycarboxylic acid group structure, unsaturated polyether and an unsaturated carboxylic acid monomer are subjected to a radical polymerization reaction according to a molar ratio of(0.1-0.5):1:(3-8) to obtain the polycarboxylic acid water reducing agent.
Owner:JIANGSU SOBUTE NEW MATERIALS +1
Polycarboxylate-type macromolecular water reducer and preparation method thereof
ActiveCN106699988AEarly strength improvementIncrease the number ofCarboxylic acidCompressive strength
The invention discloses a polycarboxylate-type macromolecular water reducer and a preparation method thereof, and belongs to the field of concrete additives. With methoxypolyethylene glycol ester macromonomers, allyl polyoxyethylene ether and amide monomers as raw materials, the polycarboxylate-type macromolecular water reducer is synthesized through a macromonomer direct copolycondensation method; the synergistic effect of multiple organic functional groups is effectively achieved, the defects of an existing water reducer product are overcome, the water reducing rate is increased, and the slump retaining property and the compressive strength are improved. According to the polycarboxylate-type macromolecular water reducer and the preparation method thereof, the production process is simple, the reaction conditions are easy to control, the production equipment requirement is low, and industrial application and popularization are easy.
Owner:HIGH & NEW TECH RES CENT OF HENAN ACAD OF SCI
Polycarboxylic acid and application thereof, and cement water reducing agent containing polycarboxylic acid
The invention provides a polycarboxylic acid and application thereof, and a cement water reducing agent containing the polycarboxylic acid, which belongs to the technical field of cement admixtures and can solve the problems of low water reducing rate and overhigh air-entraining property in the existing polycarboxylic acid. The polycarboxylic acid provided by the invention is a random copolymer of the following monomers: 50-80 wt% of unsaturated polyether disclosed as a general formula (I), 15-30 wt% of unsaturated carboxylic acid or unsaturated carboxylate and 0-25 wt% of third monomer with unsaturated double bond and polar group. In the general formula (I), R1 and R2 respectively and independently represent hydrogen atom or methyl group, R3 represents oxopropenyl group, R4 represents oxovinyl group, and R5 and R6 respectively and independently represent hydrogen atom or C1-C20 alkyl group; and a is a whole number ranging from 10 to 50, b and c are respectively and independently a whole number ranging from 30 to 100, and d is a whole number ranging from 0 to 50. The cement water reducing agent provided by the invention contains the polycarboxylic acid. The polycarboxylic acid provided by the invention can be used in the cement water reducing agent.
Owner:武汉格瑞林建材科技股份有限公司
Aminated intermediate, and aminated polyether and phosphorylated star-like products, preparation method and application thereof
ActiveCN107556446ASolve the small number of amine groupsStructural solutionPhosphorous acidAmination
The invention discloses an aminated intermediate, and aminated polyether and phosphorylated star-like products, a preparation method and application thereof. The aminated intermediate is characterizedin that the aminated intermediate and the chlorinated polyether are subjected to amination reaction, so as to obtain the aminated polyether; the aminated polyether intermediate, phosphorous acid, a catalyst and aldehyde monomers are subjected to phosphorylation reaction, so as to obtain the star-like product containing phosphorous acid groups; the star-like product containing the phosphorous acidgroups can be used as a cement dispersant, and the better dispersing effect is realized.
Owner:JIANGSU SOBUTE NEW MATERIALS +1
Polycarboxylic acid concrete plasticizer and synthesis thereof
The invention provides a polycarboxylic acid concrete plasticizer which is formed by copolymerization of three monomers A, B and C and is a polymer with the weight-average molecular weight of 15000-40000, wherein the three monomers are as follows by weight percent: monomer A is 60-70%, monomer B is 20-30% and monomer C is 5-10%; the structure of the monomer A is shown by the following formula, wherein R1 is alkyl group with less than or equal to five carbon atoms or hydrogen atom; m and n are integers within the range of 0-5; A, B, C, D , E, G, H, J and K are respectively integers within the range of 0-30, but not simultaneously 0; the monomer B is the mixture of more than two of acrylic acid, methacrylic acid, maleic acid, maleic anhydride or maleic anhydride salt; and the monomer C is the mixture of more than two of sodium methyl acryl sulfonate, sodium vinylsulphonate, styrene sodium sulfonate or 2-acrylic amide-2-methyl acrylic acid. The concrete plasticizer has the characteristics of good compatibility with various cements, and high water reducing rate and anti-collapse performance. The invention also provides a preparation method of the plasticizer.
Owner:LIAONING OXIRANCHEM INC
Preparation method of modified natural chitin bio-based high-performance polycarboxylate superplasticizer
The invention relates to a preparation method of a modified natural chitin bio-based high-performance polycarboxylate superplasticizer. A chitin high polymer is used as a raw material for preparing the polycarboxylate superplasticizer. The chitin high polymer is subjected to deacylation and degradation treatment to obtain a modified chitin oligomer connected with a hydrophilic methylol group and an amino group; maleic anhydride containing a double bond is introduced onto the amino group of the modified chitin oligomer by a grafting reaction; N-maleic anhydride-oligomeric chitin graft and sodium methacrylate sulfonate are subjected to copolymerization to prepare a novel high-performance polycarboxylate superplasticizer containing -SO3H, -COOH, -OH, -CH2OH groups. The prepared polycarboxylate superplasticizer has a good dispersion effect on cement particles at a lower dosage, has a certain comb structure, can be adsorbed on the surface of the cement particles, and can generate a steric-hinerance effect. Then, concrete doped with the polycarboxylate superplasticizer has excellent fluidity retention property.
Owner:JINLING INST OF TECH
Ceramic slurry and preparation method and application thereof
PendingCN112479723AChange surface propertiesLess attractiveAdditive manufacturing apparatusSlurryViscosity
The invention provides ceramic slurry and a preparation method and application thereof. The preparation method of the ceramic slurry comprises the following steps of S1, mixing ceramic powder and a first dispersing agent in a first solvent, and reacting to obtain modified ceramic powder, and S2, mixing the modified ceramic powder with auxiliary materials to obtain ceramic slurry. The modified ceramic powder or ceramic slurry is subjected to secondary modification through a second dispersing agent. The hydrophilic end of the first dispersing agent reacts with the surface group of the ceramic powder and is grafted to the surface of the ceramic powder, so that the surface property of the ceramic powder is changed, and the viscosity of the formed ceramic slurry is reduced. The inventor accidentally finds that even if the dispersing agent and the dispersing time are excessive, what cannot be ensured is that all the surfaces of the ceramic powder are coated with the dispersing agent. Therefore, the modified ceramic powder or the formed ceramic slurry is subjected to secondary modification, the surface of the modified ceramic powder or the formed ceramic slurry is further grafted with thesecond dispersing agent, the ceramic powder is fully coated, and the viscosity of the ceramic slurry is more effectively reduced.
Owner:SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
Novel silicone rubber containing phenyl-terminated methylvinyl(tetraphenyl)phenyl
Novel silicone rubber containing phenyl-terminated methylvinyl(tetraphenyl)phenyl relates to silicone rubber; the invention relates to novel silicone rubber containing phenyl-terminated methylvinyl(tetraphenyl)phenyl, made from, by weight, 100 parts of 107 silicone rubber of specific viscosity, 10 parts of a reinforcing agent, 10 parts of a heat resistant additive, 10 parts of a cross-linking agent, 5 parts of a catalyst, and 10 parts of an aid. The novel silicone rubber can be kept elastic in a wide temperature range, has good adhesion with various base materials, and has good tolerance to high temperature; by adding the rubber containing phenyl-terminated methylvinyl(tetraphenyl)phenyl to the silicone rubber, heat resistance of the silicone rubber is improved and the applicable range of the silicone rubber is widened.
Owner:SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
Early strengthening polycarboxylate superplasticizer for C30 concrete
The invention provides an early strengthening polycarboxylate superplasticizer for C30 concrete and a preparation method. The polycarboxylate superplasticizer is prepared from the following ingredients in parts by weight: 342 to 353 parts of polyether macromonomers with the molecular weight being 4000 to 4500, 22 to 27 parts of acrylic acid, 4 to 8 parts of rigid small monomers, 2 to 5 parts of 27.5-percent industrialized hydrogen peroxide, 3.5 to 6 parts of unsaturated sulfonate, 2 to 4 parts of functional phosphate monomers, 0.4 to 0.6 part of reducing agents, 1.4 to 2.4 parts of chain expanding agents, 6 to 12 parts of neutralizers and the balance water. The total mass is 100 parts. After the preparation, the mass percentage of the finished product is 40 percent; the acid-ether ratio control range is 3.9 to 4.3. The used polyether macromonomers are prepared from amidogen ether and polyether through being proportioned according to the mass ratio of 1:6; amino groups are reasonably introduced; slight soluble gypsum is promoted to be completely dissolved into water; the hydration process of C3A is accelerated; the formation of ettringite is promoted; the early strengthening effect is achieved.
Owner:HUBEI UNIV OF TECH
Water reducing agent composition for coal mine paste filling as well as preparation method and application of water reducing agent composition
ActiveCN112456859AImprove early strengthGuaranteed early strengthSuperplasticizerEnvironmental engineering
The invention discloses a water reducing agent composition for coal mine paste filling as well as a preparation method and application of the water reducing agent composition. The water reducing agentcomposition comprises the following components in percentage by mass: 45%-55% of an aliphatic superplasticizer, 2%-10% of a reinforcing agent, 0.2%-0.7% of a dispersing agent, 0.005%-0.02% of a waterretaining agent and the balance of water. The aliphatic superplasticizer and the reinforcing agent in the water reducing agent composition have a synergistic effect, so that the early strength of thehigh-gangue-content paste filling material can be improved; the dispersing agent can play a role in stabilizing particle dispersion and suspension and promote the water reducing effect of the aliphatic superplasticizer; the water retaining agent can improve the wrapping performance of the filling material slurry; the combined action of the components can be used for improving the flowing performance of the gangue paste filling material, improving the wrapping performance of the gangue paste filling material, improving the strength of the gangue paste filling material, reducing the cost of thefilling material, effectively controlling the slump of the paste filling material and meeting the pumping performance of underground long-distance transportation of a coal mine.
Owner:XUZHOU CUMT BACKFILL TECH
Starch-based water reducing agent and production process thereof
The invention relates to the technical field of building material preparation, in particular to a starch-based water reducing agent and a production process thereof. The starch-based water reducing agent is prepared from the following raw materials in parts by weight: 50-80 parts of starch, 4-8 parts of an oxidation reagent, 5-12 parts of an etherification reagent, 20-45 parts of sodium methallyl sulfonate, 4.5-7.0 parts of an initiator, 2.5-4.0 parts of dihydroxysuccinic acid and a proper amount of distilled water and absolute ethyl alcohol. The starch is used as a raw material for preparing the high-efficiency water reducing agent and is modified, and the modified starch contains rich macromolecular groups, so that a strong steric hindrance effect is easily formed on the surfaces of cement particles, the cement particles are more sufficiently and uniformly dispersed, and re-agglomeration of the dispersed particles is reduced. Compared with a water reducing agent sold in the market at present, the retarding and water reducing effects of the starch-based water reducing agent are more excellent. Moreover, the starch is used as the raw material, so that the production cost can be reduced, the environment can be protected, and the pollution to the environment is reduced.
Owner:ZHEJIANG LAOHUSHAN BUILDING MATERIALS
Stone anti-pollution protective agent
InactiveCN108587330AStrong steric hindrance effectPrevent penetrationAntifouling/underwater paintsPaints with biocidesEmulsionOCTENYLSUCCINIC ACID
The invention discloses a stone anti-pollution protective agent and belongs to the technical field of stone protection. The stone anti-pollution protective agent is prepared by the following steps: dropwise adding octenyl succinic anhydride into a chitosan liquid, then dropwise adding a sodium hydroxide solution to adjust pH, heating, stirring and reacting, adjusting pH to obtain a modified chitosan liquid, and carrying out ultrasonic dispersion on an emulsifier and the modified chitosan liquid at the mass ratio of 1: 50-1: 100 so as to obtain a modified nanometer chitosan emulsion; heating meerschaum, aldehyde, water and sodium hydroxide solution and stirring and reacting, and filtering to obtain modified meerschaum; placing rubber powder, the modified nanometer chitosan emulsion, stone flour, a thickening agent, Carbomer, a silane coupling agent, modified meerschaum and water into a feed mixer, and stirring at high rotating speed of 1000-1200 r / min so as to obtain the stone anti-pollution protective agent. the stone anti-pollution protective agent prepared by the technical scheme has excellent waterproofness and resistance to soiling, and acid resistance and alkali resistance ofthe product are also remarkably enhanced.
Owner:蒋春霞
Polycarboxylic acid and application thereof, and cement water reducing agent containing polycarboxylic acid
ActiveCN102206314BSolve the problem of excessive air entrainmentAir bleed can be adjustedDouble bondMethyl group
The invention provides a polycarboxylic acid and application thereof, and a cement water reducing agent containing the polycarboxylic acid, which belongs to the technical field of cement admixtures and can solve the problems of low water reducing rate and overhigh air-entraining property in the existing polycarboxylic acid. The polycarboxylic acid provided by the invention is a random copolymer of the following monomers: 50-80 wt% of unsaturated polyether disclosed as a general formula (I), 15-30 wt% of unsaturated carboxylic acid or unsaturated carboxylate and 0-25 wt% of third monomer with unsaturated double bond and polar group. In the general formula (I), R1 and R2 respectively and independently represent hydrogen atom or methyl group, R3 represents oxopropenyl group, R4 represents oxovinyl group, and R5 and R6 respectively and independently represent hydrogen atom or C1-C20 alkyl group; and a is a whole number ranging from 10 to 50, b and c are respectively and independently a whole number ranging from 30 to 100, and d is a whole number ranging from 0 to 50. The cement water reducing agent provided by the invention contains the polycarboxylic acid. The polycarboxylic acid provided by the invention can be used in the cement water reducing agent.
Owner:武汉格瑞林建材科技股份有限公司
Preparation method of insulation medium with improved energy density
ActiveCN110922618AHigh dielectric constantHigh energy storage densityInsulatorsPolymer scienceDiaminodiphenyl ether
The invention discloses a preparation method of an insulation medium with an improved energy density. The preparation method comprises following steps: dissolving 1,4-phenylene diisothiocyanate into apolar solvent, then adding organic diamine, carrying out reactions for 3 to 6 hours at a room temperature in a nitrogen atmosphere, then adding 4,4'-diaminodiphenyl ether and pyromellitic dianhydride, carrying out reactions for 12 to 18 hours at a room temperature in a nitrogen atmosphere to obtain a polythiourea-polyamide acid random copolymer solution; then paving the polythiourea-polyamide acid random copolymer solution on a copper plate, and heating the copper plate in a gradient mode to obtain a polythiourea-polyamide acid random copolymer. The arrangement mode of polyimide monomers in the copolymer molecular chains is changed to change the dielectric response feature and trap parameters of the insulation medium so as to control the dielectric constant and breakdown field strength, finally the energy density of the insulation medium is controlled or improved; and the insulation medium can be wildly used in many fields: high voltage energy storage devices, pulse power source, aeronautics and astronautics, hybrid vehicles, and the like.
Owner:XI AN JIAOTONG UNIV
Heat treatment method for improving dielectric constant of insulating medium
InactiveCN110919948AHigh dielectric constantDomain size reductionFlat articlesInsulatorsThermodynamicsThin membrane
The invention discloses a heat treatment method for improving the dielectric constant of an insulating medium. The method comprises the steps that a polythiourea polymer is dissolved in a polar solvent and uniformly stirred, the polythiourea solution is dropwise added onto a glass sheet through a tape casting method, the glass sheet is placed on a heating bench for treatment for 0.5-1 hour at 55-65 DEG C, then the temperature of the heating bench is increased to 75-85 DEG C, treatment is carried out for 4-6 hours, finally, drying is carried out, and a polythiourea film is obtained; the polythiourea film is treated for 1-4 hours under the high-temperature condition of 100-140 DEG C and then placed in liquid nitrogen for quenching, and the polythiourea insulating medium is obtained. According to the method, the dielectric response characteristic of the polythiourea insulating medium is regulated by changing the heat treatment condition of the alicyclic polythiourea film and regulating the state of a polythiourea internal molecular chain, and the dielectric constant of the insulating medium is finally controlled or improved. The method can be widely applied to the fields of high-pressure energy storage equipment, high-energy pulse generators and the like.
Owner:XI AN JIAOTONG UNIV
Preparation method of long-acting water-based paraffin inhibitor
InactiveCN108048064AAvoid breakingNot easy to gatherPipeline systemsDrilling compositionWater basedPolyvinyl alcohol
The invention discloses a preparation method of long-acting water-based paraffin inhibitor, and belongs to the technical field of oil exploitation. The method comprises the steps that a performance additive, sodium alginate liquid and saccharomycetes liquid are stirred and mixed, a sodium sulfate solution is added subsequently, stirring and mixing continue to be conducted, cooling is conducted, aglutaraldehyde solution is dropwise added, stirring and mixing continue to be conducted, the pH is adjusted, filtration and drying are conducted, and a modified microcapsule is obtained; octenyl succinic anhydride is dropwise added in polyvinyl alcohol liquid, stirring and mixing are conducted, and a primary mixture is obtained; a sodium hydroxide solution is dropwise added in the primary mixture,the pH is adjusted to be 8.3-8.5, heating and stirring are conducted, and a secondary mixture is obtained; hydrochloric acid with the mass fraction being 8%-10% is dropwise added in the secondary mixture, the pH of the secondary mixture is adjusted to be 6.8-7.1, and modified polyvinyl alcohol liquid is obtained. According to the technical scheme, the prepared long-acting water-based paraffin inhibitor has the advantages of being excellent and long-acting in paraffin control effect.
Owner:CHANGZHOU AMANTE CHEM CO LTD
Polycarboxylate superplasticizer and preparation method thereof
ActiveCN112094385AThe preparation process is simple and controllableMud resistantPolymer scienceEnd-group
The invention relates to a polycarboxylate superplasticizer which is a random copolymer formed by more than or equal to 10% and less than or equal to 20% of unsaturated carboxylic acid A, more than orequal to 45% and less than or equal to 75% of first polyether macromonomer B and more than or equal to 10% and less than or equal to 45% of POSS modified second polyether macromonomer C. According tothe invention, the polycarboxylate superplasticizer has a comb-shaped structure of a traditional polycarboxylate superplasticizer, part of long-chain branch end groups contain POSS groups, and the polycarboxylate superplasticizer can be used as a composite polycarboxylate superplasticizer with good water reducing performance, mud resistance and early strength performance at the same time.
Owner:武汉艾博思特科技有限公司
Waterproof emulsion with reinforced waterproof agent emulsion structure
PendingCN111072860AImprove stabilityImprove waterproof performanceFibre treatmentTripropylene glycolDisperse dye
The invention discloses a waterproof emulsion with a reinforced waterproof agent emulsion structure. The waterproof emulsion specifically comprises the following components: 3.60% of a fluorine-containing acrylate copolymer, 0.60% of an emulsifier, 0.60% of tripropylene glycol, 1.00% of styrene, 0.20% of acrylic acid, 0.15% of a polyether compound, 0.004% of a quaternary ammonium salt high-molecular compound, 0.005% of polydimethylsiloxane, 93.841% of deionized water and a pH regulator. According to the waterproof emulsion, after a polyester fabric is dyed by polyester fabric disperse dye, special cleaning treatment is not needed after the medium-color and light-color fabrics are dyed, and a dark fabric is subjected to weak cleaning treatment after dyeing, and waterproof performance of fabrics after waterproof treatment is excellent, the anti-interference performance of a water repellent emulsion stabilizer, flooding of disperse dye and the like is effectively improved, and the occurrence time of roller sticking during finishing is effectively prolonged, so that energy consumption is reduced, sewage is reduced, the production period is shortened, and the operation cost is reduced.
Owner:浙江辉凯鼎瑞新材料有限公司
Marine fuel oil stability additive and preparation method thereof
PendingCN114292205APrevent self-associationStrong adsorption and dispersionOrganic compound preparationCarboxylic acid amides preparationDichloromethaneProcess engineering
The invention discloses a marine fuel oil stability additive. The marine fuel oil stability additive is of an alkyl amic acid structure. The preparation method of the additive comprises the following steps: slowly dropwise adding a dichloromethane solution of tertiary alkylamine into a dichloromethane solution of succinic anhydride, continuously reacting for 4-8 hours at 10-30 DEG C, filtering to obtain a filter cake, washing the filter cake with dichloromethane for 2-4 times after the reaction is finished, recrystallizing with acetone, and performing vacuum drying at 80-85 DEG C to obtain the additive, the marine fuel oil stability additive and asphaltene causing fuel oil precipitation have very strong adsorption and dispersion effects, so that the marine fuel oil stability additive has a remarkable fuel oil system stabilization effect, and the organic matter deposition rate of fuel oil can be reduced to 0.05% or below and is far superior to the technical index requirement of 0.1%.
Owner:CNOOC TIANJIN CHEM RES & DESIGN INST
A kind of preparation method of insulating medium that improves energy storage density
ActiveCN110922618BHigh dielectric constantHigh energy storage densityInsulatorsPolymer scienceDiaminodiphenyl ether
The invention discloses a preparation method of an insulating medium for improving energy storage density, which comprises dissolving 1,4-phenylene diisothiocyanate in a polar solvent, adding organic diamine, and reacting in a nitrogen environment and room temperature 3-6 hours, then add 4,4'-diaminodiphenyl ether and pyromellitic dianhydride, and react for 12-18 hours under nitrogen environment and room temperature to obtain random copolymerization of polythiourea and polyamic acid The compound solution; the random copolymer solution of polythiourea and polyamic acid is spread on a copper plate, and the temperature is raised by gradient to obtain a random copolymer of polythiourea and polyimide. The invention controls the dielectric constant and breakdown field strength by changing the arrangement of polyimide monomers in the copolymer molecular chain, thereby changing the dielectric response characteristics and trap parameters of the material, and finally controlling or improving the energy storage of the material Density, can be widely used in high-voltage energy storage equipment, pulse power sources, aerospace, hybrid vehicles and other fields.
Owner:XI AN JIAOTONG UNIV
Ultra-dispersion agent for filling modification of polymer materials and preparation method thereof
InactiveCN101665557BLength adjustmentAvoid gatheringTransportation and packagingMixingChemical industryParaffin wax
The invention relates to an ultra-dispersion agent for filling modification of polymer materials and a preparation method thereof, which belong to the technical fields of new materials and the chemical industry. The preparation method comprises the synthesis of an active solvent chain segment and the graft polymerization of an anchor group. The technology for the synthesis of the active solvent chain segment comprises the following steps of: mixing acrylic ester, styrene and a cyclohexane monomer, adding a corresponding regulator and an initiator, and taking liquid paraffin as a reaction medium; adding all the materials into a reactor which is pre-filled with the liquid paraffin; and controlling the temperature, the stirring speed and the reaction time in the reactor, discharging the materials when the conversion rate is measured to achieve 95%, and preparing the active solvent chain segment. The technology for the graft polymerization of the anchor group comprises the following stepsof: adding the prepared active solvent chain segment into the reactor, gradually dripping the mixture of a silane monomer, the initiator and the regulator into the reactor and controlling the temperature, the stirring speed and the reaction time till that a system generates yellow solids. The ultra-dispersion agent can be used for the filling modification of the polymer materials.
Owner:EAST CHINA JIAOTONG UNIVERSITY
Preparation method of modified natural chitin bio-based high-performance polycarboxylate water reducer
The invention relates to a preparation method of a modified natural chitin bio-based high-performance polycarboxylate superplasticizer. A chitin high polymer is used as a raw material for preparing the polycarboxylate superplasticizer. The chitin high polymer is subjected to deacylation and degradation treatment to obtain a modified chitin oligomer connected with a hydrophilic methylol group and an amino group; maleic anhydride containing a double bond is introduced onto the amino group of the modified chitin oligomer by a grafting reaction; N-maleic anhydride-oligomeric chitin graft and sodium methacrylate sulfonate are subjected to copolymerization to prepare a novel high-performance polycarboxylate superplasticizer containing -SO3H, -COOH, -OH, -CH2OH groups. The prepared polycarboxylate superplasticizer has a good dispersion effect on cement particles at a lower dosage, has a certain comb structure, can be adsorbed on the surface of the cement particles, and can generate a steric-hinerance effect. Then, concrete doped with the polycarboxylate superplasticizer has excellent fluidity retention property.
Owner:JINLING INST OF TECH
A polycar carboxylic acid system polymer water reduction agent and its preparation method
ActiveCN106699988BEarly strength improvementIncrease the number ofCarboxylic acidCompressive strength
Owner:HIGH & NEW TECH RES CENT OF HENAN ACAD OF SCI
An aminated intermediate, its aminated polyether, phosphorylated star product, preparation method and application thereof
The invention discloses an aminated intermediate, and aminated polyether and phosphorylated star-like products, a preparation method and application thereof. The aminated intermediate is characterizedin that the aminated intermediate and the chlorinated polyether are subjected to amination reaction, so as to obtain the aminated polyether; the aminated polyether intermediate, phosphorous acid, a catalyst and aldehyde monomers are subjected to phosphorylation reaction, so as to obtain the star-like product containing phosphorous acid groups; the star-like product containing the phosphorous acidgroups can be used as a cement dispersant, and the better dispersing effect is realized.
Owner:JIANGSU SOBUTE NEW MATERIALS +1
Pigment derivative, preparation method thereof, pigment composition containing pigment derivative and application of pigment composition
PendingCN113755023AStrong steric hindrance effectInhibition of particle size agglomerationOptical filtersPorphines/azaporphinesSimple aromatic ringAlkoxy group
The invention discloses a pigment derivative which has a structure as shown in a general formula I. M represents 2H or a metal atom, a substituent group Q-Ar represents a rigid structural unit, Ar represents an unsubstituted or alkyl and alkoxy substituted aromatic ring and heteroaromatic ring, Ar is a rigid unit, Q represents a rigid linking group, and X1-X15 represent a hydrogen atom, a chlorine atom, a bromine atom or a Q-Ar substituent group. The invention also provides a preparation method of the pigment derivative, a pigment composition containing the pigment derivative and application of the composition. The method can effectively inhibit particle size agglomeration of the pigment, the prepared pigment composition has the advantages of narrow particle size distribution and easy dispersion, and the prepared color paste has excellent transparency, colorability and heat resistance.
Owner:山东凯瑞尔光电科技有限公司
Polycarboxylic acid concrete plasticizer and synthesis thereof
The invention provides a polycarboxylic acid concrete plasticizer which is formed by copolymerization of three monomers A, B and C and is a polymer with the weight-average molecular weight of 15000-40000, wherein the three monomers are as follows by weight percent: monomer A is 60-70%, monomer B is 20-30% and monomer C is 5-10%; the structure of the monomer A is shown by the following formula, wherein R1 is alkyl group with less than or equal to five carbon atoms or hydrogen atom; m and n are integers within the range of 0-5; A, B, C, D , E, G, H, J and K are respectively integers within the range of 0-30, but not simultaneously 0; the monomer B is the mixture of more than two of acrylic acid, methacrylic acid, maleic acid, maleic anhydride or maleic anhydride salt; and the monomer C is the mixture of more than two of sodium methyl acryl sulfonate, sodium vinylsulphonate, styrene sodium sulfonate or 2-acrylic amide-2-methyl acrylic acid. The concrete plasticizer has the characteristics of good compatibility with various cements, and high water reducing rate and anti-collapse performance. The invention also provides a preparation method of the plasticizer.
Owner:LIAONING OXIRANCHEM INC
Water reducing agent composition for coal mine paste filling and its preparation method and application
Owner:XUZHOU CUMT BACKFILL TECH
A kind of retarding type high-efficiency dispersant and preparation method thereof
ActiveCN105713207BImprove adsorption capacityImprove environmental adaptabilitySide chainLower grade
The invention discloses a set-retarding type efficient dispersant. The set-retarding type efficient dispersant is characterized in that a melamine derivative serves as a core, -PO3H2 and polyoxyalkylene side chains serve as the periphery and are independent from each other, but the periphery cannot be -PO3H2 or the polyoxyalkylene side chains completely simultaneously; the weight-average molecular weight of every polyoxyalkylene side chain ranges from 1,000 to 3,000, one terminal of every polyoxyalkylene side chain is exposed-OH while the other terminal thereof is unexposed fatty group or aromatic group, and every polyoxyalkylene side chain is prepared by direct oxyalkylation of corresponding fatty alcohol or aromatic alcohol. The set-retarding type efficient dispersant has a certain water reducing and slump retaining performance and remarkable set-retarding effect, and is highly adaptable to current low-grade concrete raw materials, strong in market demand, advanced in preparation technology and low in cost, thereby being promising in prospect and hopefully being developed into core technology of the concrete water reducing agent field to lead industry development.
Owner:JIANGSU SOBUTE NEW MATERIALS +1
A kind of preparation method of anti-mud type sodium alginate side chain comb polycarboxylate superplasticizer
The invention discloses a mud-resistant sodium alginate side chain comb-shaped polycarboxylate water reducer and a preparation method thereof. The raw materials for preparing the water reducer include: side chain macromonomer isopentenyl polyoxyethylene ether (TPEG2400) , main chain small monomer acrylic acid, chain transfer agent sodium methacrylate, chain initiator ammonium persulfate, sodium alginate and various parts of water. Acrylamide with a double bond was introduced on sodium alginate in advance by using the Uggi reaction. Secondly, use the aqueous solution free radical polymerization method to polymerize with each monomer, use the water retention effect of the hydrophilic group on the molecular structure of sodium alginate, and the spatial conformation of the long chain molecule of sodium alginate to synthesize the anti-mud comb modified by sodium alginate Shaped polycarboxylate superplasticizer. In cement slurry and concrete mixed with clay, it has excellent dispersibility and working performance, and reduces the sensitivity of polycarboxylate superplasticizer to clay. Promoting the application of natural polysaccharides in concrete additives is of great significance for the synthesis of green and environmentally friendly concrete admixtures.
Owner:HAINAN UNIV
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