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132results about How to "High solid content" patented technology

Preparation method of high-solid-content aqueous polyurethane for leather

The invention relates to the field of synthetic leather material polyurethane, in particular to a preparation method of high-solid-content aqueous polyurethane for leather. The method comprises the process steps of: prepolymerization reaction: reacting polyol, a hydrophilic chain extender and isocyanate monomer; monomer modification: adding polyhydroxy monomer to be modified together with polyurethane prepolymer; salt formation by neutralization: adding a neutralizing agent so that an emulsion forms salt ion groups; and chain extension subsequent to emulsification: dissolving an external emulsifying agent and a sulfonic acid chain extender in water to obtain a solution and adding the solution to the system for performing emulsification. In the invention, the emulsification property of theemulsion is improved by using carboxylic acid type and sulfonic acid type chain extenders, so that polyurethane and water are fully emulsified; simultaneously, due to the employment of the method in which self emulsification and external emulsification are combined, not only the stable emulsion can be synthesized, but also the solid content can be increased; in addition, the use of water as the solvent in emulsification is consistent with the requirement of clean production process; and the finally-synthesized emulsion has good film forming performance, high drying speed, no yellowing, excellent mechanical properties and short process flow, is suitable for the synthesis of leather substrates or surface materials, and can take the place of solvent-type products.
Owner:溧阳常大技术转移中心有限公司

Preparation method of water-based polyurethane adhesive

The invention discloses a preparation method of a water-based polyurethane adhesive, which is characterized by comprising the following steps: mixing adipic acid and dibasic alcohol according to a certain ratio, and performing esterification reaction and polycondensation reaction in the presence of catalyst and stabilizer to synthesize polyester diol; performing prepolymerization on the obtained polyester diol and diisocyanate, reacting for a certain time, and then adding carboxylic acid type hydrophilic monomer, chain extender, crosslinking agent trimethylolpropane and hydroxyl-terminated silicone oil to perform chain extension; adding acetone, cooling, and then adding aliphatic diamine sulfonate to perform chain extension; performing neutralization, dispersion, emulsification and chain extension, and performing reduced pressure distillation to remove the acetone so as to obtain water-based polyurethane emulsion having a high solid content; and adding leveling agent, thickener, defoaming agent and bactericide into the obtained emulsion to obtain the water-based polyurethane adhesive having a high solid content. According to the invention, the water resistance and the heat resistance of the water-based polyurethane adhesive are improved, and the bonding strength is high, thereby ensuring that the water-based polyurethane adhesive is suitable for bonding on shoe materials and leather.
Owner:广东多正树脂科技有限公司

Difficult-flammble polymer polyether glycol with high solid content and low viscosity as well as preparation method and application thereof

ActiveCN101812174AHigh solid contentHigh Flame Retardancy LevelUreaFire retardant
The invention discloses a method for preparing difficult-flammble polymer polyether glycol with high solid content and low viscosity. The method comprises the following steps of: firstly carrying out polycondensation on tripolycyanamide, cyanoguanidine, formaldehyde and polyether glycol with high activity by using a two-step process; then adding urea and formaldehyde into the mixture to condense at 40-160 DEG C for 5-16 hours to obtain the difficult-flammble polymer polyether glycol (MPP) with the particle diameter of 10-200nm, the solid content of 40-45 percent and the viscosity of lower than 5000mPa.s/25 DEG C. The MPP has the characteristics of difficult flammability, low fuming, opening property and hardening property, and replace fire retardant and common polymer polyether glycol in a high-bounce foaming plastic moulding formula. Because of high solid content, the use level of MPP and the production cost can be reduced under the condition of requiring common hardness. The invention also discloses a polyurethane foaming plastic with difficult flammability, low smoke and high bounce, which is synthesized by taking the MPP used as the raw material; the difficult-flammble degree of the polyurethane foaming plastic is high, and the oxygen index is up to 33 percent.
Owner:吉安创新聚氨酯科技有限公司

Method for preparing YAG transparent ceramics based on improved Isobam gel system

ActiveCN108516818AHigh solid contentImprove transmittanceBall millTransparent ceramics
The invention discloses a method for preparing YAG transparent ceramics based on an improved Isobam gel system. The method comprises the following steps that (1) grinding balls, an organic solvent, adispersing agent A, a sintering additive and ceramic powder are placed into a ball mill tank, ball milling and mixing are carried out to obtain mixed slurry A; (2) the mixed slurry A is dried, sievedand calcined to obtain raw material powder conducted with gel injection molding; (3) deionized water, an Isobam solution, an epoxy resin cross-linking agent, a pH conditioning agent, a dispersing agent B and the grinding balls are added into the ball mill tank, lastly, the raw material powder is added, after preliminary stirring is carried out, and then ball milling and mixing are carried out to obtain mixed slurry B with high solid content; (4) vacuum degassing, injection molding, gel drying and curing and gel discharging are carried out; (5) vacuum sintering, annealing and polishing are carried out on biscuit after gel discharging, and the YAG transparent ceramics are obtained. The provided method for preparing the YAG transparent ceramics based on the improved Isobam gel system has theadvantages that the solid content of the ceramic slurry is improved, the density of the biscuit is improved, the permeability of the YAG transparent ceramics prepared by vacuum sintering is greatly improved, the technology is simple, and the method is conductive to industrialized production.
Owner:XUZHOU NORMAL UNIVERSITY

Method for preparing sulfoacid/carboxylic acid waterborne polyurethane

InactiveCN102653585AHigh solid contentReduce mechanical property degradationPrepolymerIsocyanate
The invention discloses a method for preparing sulfoacid/carboxylic acid waterborne polyurethane. The method comprises the following steps of: reacting polyisocyanates with polymer polyol at the temperature between 80 and 100 DEG C, thus obtaining a product A; reacting A with a sulfoacid/carboxylic acid hydrophilic chain extender and a small-molecule chain extender at the temperature between 70 and 100 DEG C, thus obtaining a product B, cooling the product B, adding the product B into water in a stirring state for dispersing, adding an antifoaming agent into the mixture, thus obtaining a product C; and finally performing reduced pressure distillation on the product C at the temperature being below 50 DEG C for removing a cosolvent, thus obtaining the sulfoacid/carboxylic acid waterborne polyurethane. According to the method, sulfo group and carboxylic acid group are introduced into a polyurethane molecular main chain for one time, so that the sulfoacid/carboxylic acid waterborne polyurethane has the characteristics of sulfoacid waterborne polyurethane and carboxylic acid waterborne polyurethane; a waterborne polyurethane prepolymer can be emulsified and dispersed in water, the high solid content of a product is realized easily; the regularness of a polyurethane resin chain is protected; and the sulfoacid/carboxylic acid waterborne polyurethane has the advantages of simpleness in process line and high product yield.
Owner:SHAANXI UNIV OF SCI & TECH

Method for preparing carboxylic acid/sulfonic acid mixed waterborne polyurethane with high solid content with solvent-free process

ActiveCN107522841AThe production process is easy to controlHigh solid contentSolventIonomer
The invention discloses a method for preparing carboxylic acid/sulfonic acid mixed waterborne polyurethane with high solid content with a solvent-free process. The method comprises the steps as follows: firstly, 10-30 parts of polymer diol, 0-2 parts of micromolecular polyhydric alcohol, 6-20 parts of diisocyanate and 0-0.5 parts of a catalyst are added to a reactor to react at 60-90 DEG C for 2-4 h; then, 0.3-3 parts of a carboxyl-containing hydrophilic chain extender are added, and the mixture reacts at 60-90 DEG C for 2-4 h; the product is cooled to 60 DEG C or below, 0.2-2.5 parts of a neutralizer are added, the mixture reacts for 5-45 min, and an ionomer is obtained; 20-70 parts of water are added to the ionomer under the violent stirring condition, and the ionomer is stirred for 1-5 min; finally, 0.3-3 parts of a hydrophilic chain extender containing amino and sulfonate groups are added to a waterborne polyurethane dispersion liquid to react for 5-60 min, and the carboxylic acid/sulfonic acid mixed waterborne polyurethane with high solid content not lower than 45% is obtained. No organic solvents are used during production, the method is economical and environmentally friendly, and prepared waterborne polyurethane has high solid content and has the advantages of being short drying time, low energy consumption, low transportation cost and the like.
Owner:WENZHOU UNIVERSITY

Biomass synthetic resin and method for producing coconut palm mattress by use of biomass synthetic resin as adhesive

The invention discloses biomass synthetic resin and method for producing a coconut palm mattress by use of the biomass synthetic resin as an adhesive. The biomass synthetic resin is obtained through the following steps: mainly taking biomass synthetic resin albumen powder, modified starch and modified cellulose as main raw materials, preparing a chain extender as a solution, adding the main raw materials to react at a normal temperature, and then heating to perform the reaction, cooling after the reaction, orderly adding a cross-linking agent, a tackifier and an inorganic filler to stir and react to obtain a product biomass synthetic resin. The method for producing the coconut palm mattress by use of the biomass synthetic resin as an adhesive is as follows: firstly treating bundled coconut palm raw material into the coconut palm fiber, carding through a coconut shred carding machine, and then weaving as a curtain through a lapping machine; sizing and folding the curtain by use of a spraying sizing system to obtain a coconut palm blank; and then performing the prepressing molding, hot-pressing molding and after-treatment in order to obtain the product coconut palm mattress. The biomass synthetic resin adhesive disclosed by the invention is virtually formaldehyde and organic volatile matter-free, and the harm to the human body health in the use process is avoided.
Owner:郑州佰沃科技发展有限公司

Method for preparing wave absorbing material from magnetic fluid

InactiveCN103753881AHigh solid contentHigh saturation magnetizationSynthetic resin layered productsEpoxy resin coatingsNickel CarbonylSemiconductor
The invention discloses a method for preparing a wave absorbing material from magnetic fluid, and belongs to the field of a wave absorbing material. The wave absorbing material is composed of a composite material coating and a semiconductor coating; the magnetic fluid which is highly stable is prepared by preparing Fe3O4 magnetic nanoparticles by adopting a chemical coprecipitation method, and ultrasonically dispersing a proper amount of surfactant in base carrier liquid; the composite material coating is prepared by uniformly mixing epoxy resin, nickel carbonyl powder and the magnetic fluid so as to obtain a mixture I, and coating n aluminum alloy sheet with the mixture I under the action of an external magnetic field; the semiconductor coating is prepared by uniformly mixing epoxy resin and silicon carbide powder so as to obtain a mixture II, and coating the composite material coating with the mixture II. According to the method disclosed by the invention, the magnetic fluid is cured on the surface of substrate under the action of the external stable magnetic field after a magnetic cone is formed, so as to greatly increase absorption length and widen the absorption band. Meanwhile, the wave absorbing material prepared by adopting the method disclosed by the invention has the advantages of light weight, low thickness and the like, and is convenient in industrial production on a large scale.
Owner:UNIV OF SCI & TECH BEIJING

Rapid macromolecule machine-sprayable demulsification solidification filming waterproof coating and preparation method thereof

InactiveCN104312328AHigh solid contentLow viscosityConjugated diene hydrocarbon coatingsNatural rubber coatingsPolymer chemistryRubber material
The invention belongs to the technical field of waterproof coatings, and in particular relates to a rapid macromolecule machine-sprayable demulsification solidification filming waterproof coating and a preparation method thereof. The rapid macromolecule machine-sprayable demulsification solidification filming waterproof coating consists of a component A and a component B, wherein the component A consists of the following components in percentage by weight: 25-35% of macromolecule, 20-40% of water, 1-5% of an emulsifying agent, 20-50% of rubber latex and 0-5% of packing; the component B consists of the following components in percentage by weight: 30-40% of a demulsification agent and 60-70% of water. The waterproof coating can be rapidly demulsified and dehydrated to form a coating waterproof protecting layer which is excellent in waterproof property, after the coating is sprayed, the coated layer is dried into a film, the high elasticity, the low temperature flexibility and the aging resistance of a rubber material are maintained, and the coating has the advantages of high puncture force resistance, water permeation prevention, temperature resistance, freezing resistance, chemical corrosion resistance, cracking resistance and the like.
Owner:浙江鲁班建筑防水有限公司

Method for preparing oxidative crosslinked starch modified waterborne polyurethane hybridization material

The present invention relates to a method for preparing an oxygenated crosslinked starch modified water polyurethane hybridization material. The method is characterized in that high molecular weight polyhydric alcohol with molecular weight of between 350 and 20,000, polyisocyanate, carboxyl-contained small molecule polyhydric alcohol are added into a four-opening bottle in which a stirrer, a reflux condenser tube, a thermometer and a feeding device are arranged; a catalyst with water polyurethane of which the total solid mass is between 0 and 0.5 percent is added; the temperature is increased to between 30 and 110 DEG C; an isothermal reaction is carried out for 3 to 4 hours; the temperature is reduced to 60 DEG C; a neutralizer is added to react for 30 minutes; the oxidized starch with the water polyurethane of which the total solid weight is between 1 and 50 percent is added under high speed stirring; finally, deionzing and chain extender with the water polyurethane of which the total solid weight is between 20 and 92 percent is continuously added dropwise for extending chains; and after the dropwise adding, the product is continuously stirred for about 1 hour at a temperature of 40 DEG C, and the oxygenated crosslinked starch modified water polyurethane dispersed solution is obtained. The method has the advantages that the solid content of the modified PU material is improved, and the compatibility between the oxygenated crosslinked starch and the water polyurethane is improved as well.
Owner:JIANGSU UNIV
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