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

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.

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.

The invention discloses an organic silicon modified epoxy acrylate aqueous dispersion and a preparation method thereof. The method comprises the following steps of: mixing a polyether epoxy diluent and epoxy resin, and reacting the mixture with a crylic acid monomer to obtain low-viscosity epoxy acrylate prepolymer; performing grafting modification on the low-viscosity epoxy acrylate prepolymer by using maleic anhydride and introducing a hydrophilic group on a molecular chain; mixing micro-molecular amino silicone oil and organic alkali to obtain a neutralizer; and neutralizing the system, adding water for dilution and dispersion, and regulating solid content and viscosity to obtain the UV-curable organic silicon modified epoxy acrylate aqueous dispersion. The organic silicon modified epoxy acrylate aqueous dispersion has high solid content of over 60 percent and low viscosity of between 1,500 and 5,500 mPa.s. A UV cured film has high hardness of between 4H and 6H, high flexibility and water resistance and low water absorption of below 5.0 percent, and can be applied to the fields of furniture, buildings, household appliances, papermaking and printing, and the like.

The invention relates to a preparation method of non-ionic hyperbranched macromolecular dispersing agent for organic pigment belonging to the fine chemical field. The invention mainly adopts hydrophobic hyperbranched polymer, coupling agent and hydrophilic chain which are respectively dissolved in solvent to be made into solution through complete dissolving and even mixing; coupling agent solvent solution is added in a reaction vessel and warms up through stirring; hydrophilic chain solvent solution is also added in the reaction vessel for stirring and heat preservation reaction; and then, hydrophobic hyperbranched polymer solvent solution is added to complete warming-up and heat preservation reaction through stirring; finally, the non-ionic hyperbranched macromolecular dispersing agent is obtained after cooling, filtration, washing and vacuum drying. The invention can make nanometer organic dye with high solid content, ideal liquidity, high stability and fresh color; meanwhile, the invention has the advantages of simple technical process, reaction being completed at lower temperature, convenient purification of products and non-occurrence of gel and automatic acceleration phenomena.

The invention provides a nano-microcrystalline cellulose paint. The nano-microcrystalline cellulose paint comprises amphoteric nano-microcrystalline cellulose, a pigment, an adhesive, a bactericide, and a viscosity modifier at a mass ratio of 0.1-15:70-95:10-20:0.15-5:0.2-5, and also comprises water; and the solid content of the nano-microcrystalline cellulose paint ranges from 15 to 60%. According to the nano-microcrystalline cellulose paint, interaction of amphoteric nano-microcrystalline cellulose with the other ingredients is realized, and the solid content is high, so that it is beneficial for paper coating. And in addition, application of the nano-microcrystalline cellulose paint in paper coating is capable of increasing paper air permeability and surface smoothness, and reducing coating cost.

A preparation method of waterborne one-component polyurethane paint with low viscosity comprises the following steps: firstly, polymeric polyol and polyisocyanate react in a ratio of 1:(1.8-3.4) to generate an isocyanate-group terminated oligomer (a); secondly, low molecular polyol and polyisocyanate react in a ratio of 1:(0.3-0.5) to generate a hydroxyl terminated oligomer (b); the oligomer (a), the oligomer (b) and a polylactic acid oligomer react in a ratio of 1:(0.78-0.92):(0.02-0.95) to obtain waterborne polyurethane resin (c), wherein the molecular weight of the polylactic acid oligomer is 800-1,200 g/mol; and finally, a product is obtained through self-emulsification. According to the waterborne polyurethane paint prepared with the method, the viscosity is smaller than 60 s, the storage life is longer than 3 months, the solid content is higher than 40%, the water resistance of condensate is high, the insulativity is high, the mechanical strength is excellent, and the paint can serve as surface insulation paint for a transformer, a charger and a motor coil.

The invention relates to a method for preparing fluorine-silicon containing polyurethane and acrylate emulsion, which comprises the following steps of: preparing fluorine-silicon containing oil from hydrogen-silicon containing oil, fluorine containing acrylate, divinyl acrylate and absolute ethyl alcohol; and carrying out chain extension reaction of a pre-polymer obtained by reacting isocyanate, polyether glycol and polyester glycol, fluorine containing glycol, chain extension agent and hydrophilic chain extension agent, dispersing and emulsifying by adding water, decompressing, distilling and removing an organic solvent to obtain aqueous polyurethane emulsion, then adding acrylate and the fluorine-silicon containing oil to disperse at high speed, adding catalyst, increasing the temperature and polymerizing to obtain the fluorine-silicon containing polyurethane and acrylate emulsion. The fluorine-silicon containing polyurethane and acrylate emulsion prepared by using the method disclosed by the invention has the advantages of being better in integral performance, low in surface energy, better hydrophobic performance, high in solid content, controllable in solid content, simple andconvenient in preparation method, flexible and the like.

The invention relates to the technical field of paints, in particular to a solvent-free nanometer modified epoxy weather-resistant type anticorrosive paint and a preparation method thereof. Based on the relation of a similar compatible principle, a molecular structure and application, silicon-cladding nanometer titanium dioxide grains are processed by using a silane coupling agent KH-560 with an epoxy group, so that the epoxy group is arranged on the surface of a compound grain; and mutual acting force between interfaces formed by the grains and a polymer is enhanced by enabling epoxy base to participate in polymerization reaction and excellent mutual action of epoxy group and epoxy resin, so that the interface has ideal adhering capability; and therefore, the dispersion performance of the nanometer grain in the resin is improved, and the weather-resistant performance of the compound paint is improved.

The invention relates to a polyurethane prepolymer, which is characterized in that: the invention comprises the condensation polymerization products of following components: (a) binary isocyanate system formed by diphenylmethane-4, <4>- diisocyanate(MDI) and 1, 6-hexylidene diisocyanate(HDI), (b) polyatomic alcohol, and (c) organic hydroxyl compound with carboxyl. The invention also relates to an aquosity polyurethane adhesive manufactured by the polyurethane prepolymer, and the aquosity polyurethane adhesive manufactured of the invention has the advantages of low manufacturing cost, low activating temperature and high adhesive strength, and more particularly being applicable for shoes making field.

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.

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.

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.

The improved positive phase-micro-emulsion polymerization process of the present invention comprises adding emulsifier, initiator, long-chain flexible monomer, functional monomer, polyfunctionality monomer, etc. the heat initiating system of methyl acrylate or styrene monomer, synthesis of homogeneous transparent or semi-transparent nanometer polymer microgel at mild condition in controlled batchrange and then transferring into oil phase to form reactive non-aqueous dispersant microgel liquid. By means of the great amount of reactive functional groups, the microgel may be used in regulating rheological property of paint, preparing pigment moistening dispersant, etc.

The present invention relates to a pressure sensitive adhesive composition, a polarizer and a liquid crystal display device. The present invention may provide a pressure sensitive adhesive which can have excellent stress relaxation characteristic to effectively inhibit light leakage by dimension change of optical films such as polarizing plates. In addition, a pressure sensitive adhesive having excellent physical properties such as adhesion durability and workability may be provided.

[Index]

Pressure sensitive adhesive composition, Weight average molecular weight, IPN, Polarizing plate, Liquid crystal display

The invention provides a manufacturing method of a PP film veneering composite floor board. The composite floor board comprises a PP film surface layer, a non-formaldehyde adhesive layer and a multi-layer base material layer from top to bottom. The manufacturing method comprises the following steps of carrying out plasma and coating treatment on the back surface of a PP film so as to obtain the PPfilm surface layer; coating a soybean non-formaldehyde adhesive, assembling in a criss-cross way, and preparing the multi-layer base material layer through cold pressing and hot pressing; and coatinga non-formaldehyde adhesive on the front surface of the multi-layer base material layer, then adhering the front surface of the multi-layer base material layer and the PP film, and forming the PP film veneering composite floor board through cold pressing and hot pressing.

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.

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.

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.

The present invention relates to nanometer dispersed UV-resisting sunblock lotion and its preparation process, is especially one kind of nanometer titania dispersed lotion in non-water medium and its preparation process, and belongs to the field of cosmetic product technology. The nanometer dispersed UV-resisting sunblock lotion consists of compound UV-resisting titania powder or coated titania powder, non-water dispersant medium and dispersant in certain weight proportion. The preparation process includes weighing the said components in required proportion, and high speed stirring, high speed dispersion and high speed ball milling for certain time to obtain the nanometer dispersed UV-resisting sunblock lotion. The present invention has high UV shielding effect, and is homogeneous and stable.

The invention belongs to the technical field of ceramic materials, and particularly relates to silicon nitride ceramic slurry, silicon nitride ceramic and a preparation method and application thereof.The preparation method for the silicon nitride ceramic slurry provided by the invention comprises the following steps: step one, heating silicon nitride powder, to obtain thermal-oxidized silicon nitride powder; step two, mixing the thermal-oxidized silicon nitride powder and a sintering aid, and drying, to obtain dry powder; step three, enabling the dry powder to mix with a resin, a dispersing agent, a defoaming agent and a photoinitiator, to obtain the silicon nitride ceramic slurry. The advantage of the preparation method is that the surface oxidation treatment cost of the silicon nitridepowder is low, the solid content of the silicon nitride ceramic slurry is apparently improved, a scattering phenomenon of the silicon nitride ceramic slurry in a photocuring forming process is reduced, the needed exposure time of the silicon nitride ceramic slurry in the photocuring forming process is reduced, a forming efficiency is improved, and the thermal-oxidized silicon nitride powder can promote sintering densification and improve ceramic performance.

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.

The invention relates to a highly wear-resistant naphtha catalytic cracking to olefin fluidized bed catalyst and a preparation method thereof, which mainly solves the technical problem that the existing catalysts are great in abrasion. By adopting the technical scheme that the catalyst provided by the invention comprises the following components in percentage by weight: 1) 20.0-55.0% of kaolin; 2) 10.0-25.0% of a binder; 3) 0.2-15.0% of phosphoric oxides; 4) 0.1-10.0% of rare earth element oxides; 5) 25.0-60.0% of a ZMS-5 molecular sieve; and 6) 0.05-3% of at least one of oxides of transitional metals in IB family, IIB family or IVB family in the periodic table of elements, the problem is better solved. The catalyst can be used in industrial production of naphtha catalytic cracking to ethylene and propylene.

The invention provides a water-based polyurethane adhesive and a preparation method thereof. The water-based polyurethane adhesive comprises a prepolymer and water, wherein the prepolymer is dispersed into the water to form a solution, solid content of the solution is 50%, the prepolymer is prepared from the following raw materials: polyethylene glycol, polyester dihydric alcohol, carboxylic acid type hydrophilic chain extender, diisocyanate and a micromolecule chain extender, the mole ratio of polyethylene glycol to polyester dihydric alcohol to carboxylic acid type hydrophilic chain extender to diisocyanate to a micromolecule chain extender is (25-40):X:(10-X):(7.5-15):(7.5-15), and X is any numerical value from 0 to 10. The invention also provides a preparation method of the water-based polyurethane adhesive. The prepared water-based polyurethane adhesive has high solid content and good dispersion stability, maintains some good performances of the traditional solvent type polyurethane adhesive and also has the advantages of safety, difficulty in combustion, no pollution to the environment and high peeling strength.

The invention provides a method for preparing magnetofluid ink by using nanometer magnetic powder, and belongs to the field of printing. The magnetofluid ink is composed of the nanometer magnetic powder and printing ink. Firstly, Fe3O4 magnetic nano-particles are prepared with the chemical coprecipitation method, then an appropriate amount of surface active agent is added and dispersed in the ink, and the magnetofluid ink high in stability is prepared. According to the method, the nanometer magnetic powder is directly added to the printing ink and evenly dispersed in the ink to form stable fluid, and therefore the magnetofluid ink is obtained. Meanwhile, the magnetofluid ink prepared with the method has the advantages of being simple in process, high in magnetic induction intensity, controllable in viscosity and the like, so that industrial mass production is convenient to achieve.

The invention relates to a low-wear fluidized bed catalyst for preparing aromatics from methanol, and a preparation method for the low-wear fluidized bed catalyst for preparing the aromatics from the methanol, and mainly solves the technical problem that an existing catalyst is large in wear. According to the technical scheme adopted, the fluidized bed catalyst comprises the following components in percentage by weight: (1) 20.0-55.0% of kaolin, (2) 10.0-25.0% of a binder, (3) 0.2-15.0% of phosphorus oxide; (4) 0.1-10.0% of metal element oxide, and (5) 25.0-60.0% of a ZSM-5 molecular sieve, wherein the phosphorus oxide is added during preparation of slurry for spray-drying a catalyst, and the problem is well solved, and the low-wear fluidized bed catalyst and the preparation method thereof can be used for industrial production of preparing the aromatics from the methanol.

The invention discloses a joint mixture. The joint mixture comprises the following components, by weight, 400-600 parts of organic silicon emulsion, 400-600 parts of acrylic emulsion, 1-2 parts of bactericide, 1-2 parts of defoamer and 10-20 parts of thickening agent which are mixed and stirred, wherein the solid content of the acrylic emulsion is 52-55%. The joint mixture is of a capillary crystalline type, and is of a transparent shape after coating the surface of a substrate to form a film, the color of the substrate is not changed after the film is formed, in addition, the weatherability and the stain resistance of the joint mixture are high, and the water seepage prevention performance is good.

The invention provides a waterborne polyurethane acrylate wood lacquer free of VOCs and a preparation method thereof. The waterborne polyurethane acrylate wood lacquer free of VOCs is characterized bycomprising the following raw materials by weight: 50-80 parts of polyurethane acrylate resin, 2-4 parts of a film-forming aid, 1-3 parts of a thickening agent, 5-20 parts of a pigment and filler, 1-2parts of a leveling agent, 0.2-1 part of a defoaming agent and 10-30 parts of deionized water. The waterborne polyurethane acrylate wood lacquer of the invention has high solvent resistance and strong adhesion.

The invention relates to a colored laminating adhesive which is prepared from 10-20 wt% of an organic pigment and 80-90 wt% of a laminating adhesive. The organic toner contains 40-45wt% of an organic toner and 55-60wt% of an acrylic acid emulsion. The product itself can be used to synthesize broken color wallpaper without printing. Solid content of the product is high. As the emulsion belongs to a self-crosslinking type, macromolecules of the emulsion crosslink automatically during the composition. Thus, peel strength is high. The product has high quality and excellent comprehensive properties, and can cover powders. After the composition, the product has good brightness, can undergo indentation, embossing, concave-convex formation and the like, has no bubbles, has good toughness, is flat and beautiful, has no glue-opening phenomenon if affected with moisture, is environmentally friendly, is solvent-free, is not inflammable or explosive, and is safe to use. The product provided by the invention has stable comprehensive properties, is convenient to manufacture, popularize and use, and has a wide market prospect.

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.

The invention provides a high-solid content two-component aqueous polyurethane adhesive having a low temperature activating property and a preparation method thereof. The adhesive comprises, by mass, 90 to 97% of a component A and 3 to 10% of a component B. The component A comprises, by mass, 0 to 50% of mixed polyol, 0 to 2% of a catalyst, 0 to 9% of polyisocyanate, 0 to 5% of a polyhydroxy micromolecular chain extender, 0 to 5% of a sulfamate hydrophilic chain extender, 0 to 50% of deionized water, 0 to 4% of an amine chain extender, 0 to 3% of a defoaming agent, 0 to 3% of a wetting and dispersing agent and 0 to 3% of a leveling thickener, and the component B is an aliphatic polyisocyanate curing agent. The aqueous adhesive has solid content of more than 50%, can be dried and activated at a temperature below the room temperature, has high peel strength and good heat resistance, can be used for bonding shoe materials and automotive interior materials and has a large economic value.