622 results about "Polyurethane dispersion" patented technology

The invention relates to the technical field of coatings, in particular to a high-performance environment-friendly coating and a galvanized sheet prepared from the same. The high-performance environment-friendly coating is prepared from the following components in parts by weight: 120 to 150 parts of waterborne polyurethane dispersion liquid, 10 to 15 parts of graphene oxide nanosheets, 4 to 10 parts of boron nitride nanosheets, 2 to 6 parts of inorganic nanoparticles, 0.5 to 2 parts of anti-settling agent, 0.5 to 2 parts of defoaming agent, 0.2 to 2 parts of wetting dispersant and 50 to 100 parts of deionized water. By selecting inorganic nanoparticles with specific particle sizes, the inorganic nanoparticles can be dispersed between the boron nitride nanosheets and the graphene oxide nanosheets, the dispersion and lubrication effects similar to those of bearings are achieved, the isolation and shielding effects of the nanosheet material are improved, and the stability of the coating is improved.

The invention relates to the technical field of adhesives, and discloses an antibacterial mildew-proof water-based adhesive and a preparation method thereof. The preparation method of the antibacterial and mildew-proof water-based adhesive comprises the following steps: reacting 2, 2-dimethylolpropionic acid with castor oil to obtain hyperbranched bio-based polyol; modifying the hyperbranched bio-based polyol by using a modifier to obtain modified bio-based polyol; the preparation method comprises the following steps: preparing a waterborne polyurethane dispersion liquid by taking modified bio-based polyol, a hybrid modified BN / MOF composite material and hexamethylene diisocyanate as raw materials and 1, 4-butanediol as a chain extender; the preparation method comprises the following steps: mixing a waterborne polyurethane dispersion liquid, a wetting agent, a defoaming agent, a thickening agent and water to obtain a component A; an aliphatic curing agent is used as a component B; during use, the component A and the component B are mixed and stirred. The antibacterial and mildewproof water-based adhesive disclosed by the invention has excellent adhesion performance, water resistance, self-repairing performance and lasting antibacterial and mildewproof performance.

Disclosed in the present application is an ionic liquid type waterborne polyurethane dispersion, which is characterized in that a cationic waterborne polyurethane dispersion is obtained by grafting a cationic liquid to a waterborne polyurethane resin main body by means of a chemical reaction, wherein the cationic liquid is derived from an ionic liquid alcohol. Further provided in the present application are a preparation method for and the use of the ionic liquid type waterborne polyurethane dispersion. In the present application, the cationic liquid is grafted to the waterborne polyurethane resin main body by means of a chemical reaction, thereby solving the problems of low conductivity and a low lithium ion transference number of a polymer-based electrolyte.

The invention belongs to the technical field of high polymer materials, and particularly relates to a polyurethane-acrylate emulsion with a core-shell structure as well as a preparation method and application of the polyurethane-acrylate emulsion. Double bonds and keto groups are introduced into polyurethane to form a core-shell structure with acrylate as a core and polyurethane as a shell and a keto-hydrazine crosslinking double-crosslinking system with acrylate as a core and polyurethane as a shell, and a water-based acrylate dispersion and a water-based polyurethane dispersion form double crosslinking through double bonds and keto-hydrazine crosslinking, so that the effect of complementary advantages is achieved; therefore, the water-borne wood paint resin with excellent comprehensive performance is obtained. Performance test results show that the polyurethane-acrylate emulsion film with the core-shell structure has good adhesive force, glossiness, hardness, wear resistance and water resistance, and is suitable for being used as water-borne wood paint.

The invention discloses durable metal gel as well as a preparation method and application thereof, and belongs to the technical field of conductive elastomers and composite materials. The preparation method comprises the following steps that S1, a liquid metal-waterborne polyurethane mixed solution is prepared, specifically, liquid metal and waterborne polyurethane dispersion liquid are mixed and dispersed, and the liquid metal-waterborne polyurethane mixed solution is obtained; and S2, drying treatment is conducted, specifically, the liquid metal-waterborne polyurethane mixed solution is dried, and the durable metal gel is obtained. The durable metal gel disclosed by the invention has both metal-grade electronic conductivity and durability.

The present invention relates to polyurethanes and polyurethane dispersions based on polyethers obtainable from renewable sources, particularly biomass.

The invention discloses a waterproof coating with reflective heat insulation performance and application thereof, the waterproof coating comprises 35-60% of a waterborne polyurethane dispersion, 10-13% of a light reflecting agent, 5-15% of heat insulation microbeads, 3-10% of nano aerogel adhesive cement, 5-10% of water, 5-10% of filler and 0.5-10% of other functional additives based on the total weight of the waterproof coating; wherein the heat insulation microbeads comprise glass hollow microbeads, ceramic hollow microbeads and mineral wool. The waterproof coating has excellent heat insulation performance, weather resistance, bonding performance and waterproof performance.

A new method for recycling polyurethane, in particular polyurethane foam via solvolysis can be performed. The new method includes a very efficient pre-treatment method of the polyurethane, wherein it is converted into a polyurethane dispersion. The method also includes providing the polyurethane, preparing a dispersion, and solvolyzing the dispersion. The polyurethane has an average particle size of 0.1 to 12 mm.

This invention belongs to the field of coating technology and discloses a water-based two-component polyurethane clear varnish and its preparation process. The water-based two-component polyurethane clear varnish includes component A and component B. Component A includes the following raw materials in parts by weight: 85-110 parts of water-based polyurethane dispersion, 40-45 parts of modified acrylic dispersion, 10-25 parts of modified silica, 30-40 parts of modified titanium dioxide, 4-6 parts of dispersant, 0.5-2 parts of defoamer, 0.5-2 parts of leveling agent, and 10-20 parts of water. Component B is a polyisocyanate curing agent. This invention uses water-based polyurethane dispersion and modified acrylic dispersion as film-forming substances, polyisocyanate as curing agent, and adds modified silica and modified titanium dioxide to prepare a water-based two-component polyurethane clear varnish. The modified acrylic dispersion gives the coating film excellent physical properties such as hardness and gloss. The modified silica can improve the hardness and wear resistance of the coating film, and the modified titanium dioxide can improve the thermal stability and flame retardant properties of the material.

A “Passive Radiative Coating” (PRC) is designed to dissipate heat generated mainly by solar radiation, intended for use in the manufacture of overhead conductors and cables. Additionally, this coating can dissipate heat produced by the conductors themselves, known as the Joule effect, providing environmental protection and significantly improving heat dissipation capacity. The PRC is composed of at least one filler, at least one binder, and at least one surfactant. In particular, the use of calcium carbonate and / or barium sulfate as fillers, and epoxy resins, alkyd varnishes, polyurethane dispersions, casting resins, silicone-based varnishes, and sodium silicate as binders are highlighted. The surfactant is used to stabilize the mixture and acts as a stabilization additive.

The invention belongs to the technical field of polymer materials, and provides a waterborne polyurethane dispersoid as well as a preparation method and application thereof, the waterborne polyurethane dispersoid is prepared from the following raw materials: polyisocyanate, polybutadiene polyol, a hydrophilic chain extender, an optional micromolecule chain extender and a neutralizer; polybutadiene polyol with a specific structure and molecular weight is adopted as a soft segment, and through component design and mutual compounding, the waterborne polyurethane dispersion has lower polarity and surface energy, has good adaptability with a low-surface-energy substance / low-surface-energy filler, can form excellent dispersion and coating effects on the low-surface-energy substance, and can be used for preparing the waterborne polyurethane dispersion. The slurry performance is improved; meanwhile, the waterborne polyurethane dispersion has excellent solvent resistance, low temperature resistance, hydrolysis resistance and mechanical properties, and has wide application prospects in the fields of battery slurry dispersants, photovoltaic backboard adhesives, conformal coating and the like.

The invention provides a sound-insulation porous ceramic tile and a preparation method thereof, and belongs to the field of building materials. The sound-insulation porous ceramic tile is prepared from the following raw materials: 20 to 30 parts of kaolin, 18 to 22 parts of quartz sand, 12 to 18 parts of potassium feldspar, 3 to 7 parts of talcum powder, 3 to 7 parts of silicon carbide powder, 2 to 4 parts of ferrosilicon alloy powder, 0.5 to 1.5 parts of sodium bicarbonate, 3 to 5 parts of hollow glass beads, 1 to 3 parts of zirconium oxide microspheres, 1 to 3 parts of silicon dioxide aerogel particles, 3 to 5 parts of acrylate emulsion, 1 to 3 parts of butadiene styrene rubber emulsion, 0.5 to 1.5 parts of polyvinyl alcohol solution and 1 to 2 parts of polyurethane dispersion. The composite material comprises the following components in parts by weight: 30-60 parts of polypropylene, 0.3-0.7 part of a dispersing agent, 0.2-0.4 part of a defoaming agent, 0.8-1.6 parts of reinforced fibers and 9-13 parts of deionized water. The raw materials of the porous ceramic tile are reasonably designed, the sound insulation performance of the porous ceramic tile is improved, and full-band efficient sound insulation is achieved.

The invention relates to the technical field of polymer composite materials, and discloses an excimer skin-touch coating and a preparation method thereof.The coating is prepared from polyurethane dispersoid, organic silicon modified acrylic resin, a skin-touch additive, inorganic pigment filler, a solvent and a functional additive, the preparation method comprises the following steps: compounding base materials of polyurethane and organic silicon modified acrylic resin to form an interpenetrating network skeleton, then introducing a skin feeling auxiliary agent and a pigment filler step by step to realize gradient dispersion, and finally finishing system optimization through the synergistic effect of rheological regulation and functional auxiliary agents. Through a molecular structure interpenetrating network, intelligent process control and environmental protection technology integration, the core problems of easy touch attenuation, strong environmental sensitivity, auxiliary agent migration, pollution emission and the like of a traditional skin-touch coating are solved. The technology of gradient copolymerization anchoring, humidity dynamic compensation, closed-loop process control and the like is creatively fused, and multiple breakthroughs of long-acting skin feeling, high environmental adaptability and green production of the coating are achieved while excellent mechanical performance is kept.

Disclosed is an aqueous polyurethane dispersion. Raw materials for preparing the aqueous polyurethane dispersion comprise a combination of a prepolymer, a chain extender, and an external emulsifier. Raw materials for preparing the prepolymer comprise, in parts by weight, 7-15 parts of isocyanate, 25-43 parts of a polyol, and 0.2-2 parts of a reactive internal emulsifier, wherein the isocyanate comprises 1,5-pentamethylene diisocyanate, and the mass percentage of the 1,5-pentamethylene diisocyanate in the isocyanate is greater than or equal to 30%. The aqueous polyurethane dispersion has the viscosity less than 800 (23°C, mPa.s), the light transmittance greater than 89%, and the water absorption less than 4%.

The invention discloses a wiredrawing aluminum laminated film and a preparation method thereof, and belongs to the field of films. The wiredrawing aluminized film comprises a wiredrawing base material, a polyurethane coating and an aluminized layer which are arranged in sequence, the polyurethane coating is formed by curing a polyurethane coating, the polyurethane coating is subjected to plasma surface treatment, and the polyurethane coating comprises a waterborne polyurethane dispersion liquid, a diluent and water which are compounded according to the weight ratio of 1: (0.5-1): (0.5-1); the waterborne polyurethane dispersion liquid is prepared from the following raw materials in parts by weight: 2-8 parts of double-end hydroxypropyl polysiloxane; 15 to 20 parts of polyether polyol; 15 to 20 parts of diisocyanate; 3-6 parts of a chain extender; 5-9 parts of a hydroxyl acrylate monomer; 2-5 parts of an acrylate monomer; 1 to 3 parts of single-ended vinyl polysiloxane; and 80-90 parts of water. The method has the advantages that the adhesive force of the aluminum layer is improved, and the durability of the wiredrawing aluminum laminated film is improved.

The invention relates to a multifunctional water-based low-temperature paint double-coating structure which comprises a first coating and a second coating, the first coating comprises a metal sheet pigment and inorganic oxide pigment mixture, and the second coating comprises transparent organic color paste. A first coating paint composition used for the first coating and a second coating paint composition used for the second coating are both mixtures containing acrylic resin emulsion and polyurethane dispersoid. The double-coating structure adopts the technical scheme of mixed pigment, curing agents such as isocyanate are not contained, and the obtained double-coating structure has high radar wave transmission performance, high infrared reflection performance and high reflection and heat insulation capacity, is particularly suitable for black or silver coating systems, adopts water-based low-temperature coating, and has the advantages that the water-based low-temperature coating is adopted, so that the water-based low-temperature coating is more environment-friendly; the paint has the characteristics of remarkable low-temperature quick-drying film formation, thin coating and low VOC (volatile organic compound), and can realize low energy consumption, health and environmental protection of a coating process. The invention further comprises a multifunctional water-based low-temperature paint coating system and application.

The invention discloses a bio-based waterborne polyurethane coating and a preparation method thereof, and belongs to the technical field of coatings. The bio-based waterborne polyurethane coating prepared by the invention is prepared from the following raw material components in parts by weight: 70 to 80 parts by mass of bio-based polyurethane dispersion liquid, 40 to 60 parts by mass of polysiloxane dispersion liquid, 2 to 5 parts by mass of a cosolvent, 0.1 to 0.5 part by mass of a defoaming agent, 0.5 to 1 part by mass of a photoinitiator and 0.1 to 3 parts by mass of an antioxidant, wherein the bio-based polyurethane dispersion liquid is obtained by dispersing bio-based polyurethane in deionized water, and the bio-based polyurethane is obtained by reacting a polyisocyanate monomer, a catalyst, castor oil and a chain extender; the polysiloxane dispersion liquid is obtained by performing polycondensation on siloxane monomers and then dispersing the siloxane monomers in deionized water.

A method is described for debonding a bonded article. The bonded article comprises at least two components which are bonded to one another by means of a polyurethane adhesive selected from aqueous polyurethane dispersion adhesives and polyurethane hotmelt adhesives. At least one of the components is a thermoplastic polyurethane. The components are debonded by treatment with an aqueous surfactant composition at elevated temperatures.

The invention relates to the technical field of functional coatings, in particular to an environment-friendly water-based strippable coating and a preparation method thereof.The environment-friendly water-based strippable coating is prepared from, by mass, 25%-45% of film-forming resin, 8%-20% of a stripping functional component, 10%-25% of a filler system, 3%-8% of a functional additive and the balance water, the stripping functional component is a ternary system of a wax emulsion, organic silicon modified acrylate and a fluorocarbon modified polymer, through collaborative design of the components, controllable stripping, no residue and no damage of a coating on various base materials such as metal, plastic and glass are achieved, meanwhile, the coating has excellent water resistance, weather resistance and environmental protection performance, and the coating can be widely applied to various substrates such as metal, plastic, glass and the like. The method is suitable for temporary protection in the fields of automobiles, electronics, precise instruments and the like.

The invention discloses water-based colored paint for automobiles as well as a preparation method and application of the water-based colored paint. The water-based colored paint is prepared from the following raw materials in parts by weight: 10 to 15 parts of water-based polyurethane dispersion, 5 to 9 parts of water-based hydroxy acrylic acid dispersion, 4 to 8 parts of melamine formaldehyde resin, 2 to 4 parts of color paste, 1 to 2 parts of aluminum paste, 2 to 3 parts of pearlescent pigment, 15 to 30 parts of deionized water and an organic solvent, the organic solvent comprises 6-8 parts of a high-boiling-point alcohol ether solvent and 2-4 parts of a swelling type solvent. The water-based colored paint for the automobile, provided by the invention, is generally used for coating an outer plate and an inner plate of an automobile body, and can be used for well improving the appearance of a coating film formed by spraying the inner plate and overcoming the problems of gloss loss and the like of the coating film when a static-free compressed air machine arm is used for spraying the inner plate of the automobile body.

The invention discloses a waterborne polyurethane adhesive and a preparation method thereof, and belongs to the technical field of high polymer materials. The waterborne polyurethane adhesive provided by the invention comprises a main agent and a curing agent, and most of raw materials of the main agent and the curing agent are waterborne materials, such as a waterborne polyurethane dispersion, a waterborne acrylic emulsion, a waterborne EVA emulsion, a waterborne rosin resin emulsion, a waterborne terpene resin emulsion and waterborne isocyanate. Due to the water-based materials, the adhesive has the characteristics of low VOC (volatile organic compounds), zero formaldehyde and low odor. Moreover, the water-based isocyanate in the curing agent and the active hydroxyl in the main agent component can be subjected to addition polymerization reaction to form a cross-linked network polymer, so that the adhesive has relatively high cohesiveness and can meet the bonding requirement of the automotive trim.

The invention discloses a preparation method and application of a super-weather-resistant industrial heavy-duty anti-corrosion coating, and relates to the technical field of coatings, and the preparation method comprises the following preparation steps: step 1, formula preparation, step 2, raw material pre-dispersion treatment, step 3, filler functionalization treatment, step 4, self-repairing system preparation, and step 5, gradient curing. 35%-40% of bio-based epoxy resin, 25%-30% of organosilicone modified acrylate and 30%-35% of deionized water are added into a dispersion kettle in proportion, then a bionic antibacterial polypeptide coating, a waterborne polyurethane dispersion and a nano-clay modified leveling agent are added, interfacial tension is reduced through the surface activity effect, primary mixing of a main resin matrix and filler is achieved, and the main resin matrix and the filler are mixed uniformly; the subsequent grinding energy consumption is reduced, and the dispersion uniformity is improved, so that agglomeration caused by too high resin viscosity is avoided, and the salt fog resistance of the coating can be improved through the synergistic protection of the double microcapsules and the bionic antibacterial polypeptide coating.

The invention discloses a coating type matte PET film and a preparation method thereof, and belongs to the technical field of films, the preparation method comprises the following steps: preparing an antistatic agent, preparing a delustering agent, preparing a coating liquid, and coating. The preparation of the coating liquid comprises the following steps: mixing a waterborne polyurethane dispersion liquid, an antistatic agent, a matting agent and a waterborne organic silicon defoaming agent, stirring at room temperature, adding an acrylic leveling agent, a wear-resistant agent and 3-aminopropyltrimethoxysilane, continuously stirring, adding polycarbodiimide, and continuously stirring to obtain the coating liquid; the prepared coating type matte PET film is high in haze, good in appearance, free of fisheyes and shrinkage cavities in the surface, uniform in haze, high in coating adhesive force, short in preparation time and high in water resistance.

The invention discloses a preparation method of a waterborne polyurethane dispersion with excellent corrosion resistance, which comprises the following steps: (1) firstly carrying out vacuum dehydration on polyol, a micromolecular polyhydroxy chain extender and a hydrophilic chain extender, and then adding polyisocyanate to carry out polymerization reaction; the preparation method comprises the following steps: firstly, adding an alkynyl silane coupling agent into a reaction kettle, then adding micromolecular diol, diol containing an alkynyl side chain and a micromolecular diamine chain extender, carrying out a chain extension reaction, and finally, adding a monoamino silane coupling agent, and carrying out an end capping reaction, so as to prepare a polyurethane polymer; (2) dispersing the polyurethane polymer solution into water to obtain a polymer emulsion; and (3) adding a dithiol compound and an initiator into the polymer emulsion, so that an alkyne group on a polymer side chain and a sulfydryl of thiol are subjected to a click coupling reaction, and the waterborne polyurethane dispersion with the side chain containing free sulfydryl is obtained. According to the invention, the micromolecular mercaptan corrosion inhibitor is grafted to a side chain of a waterborne polyurethane molecule, and the obtained waterborne polyurethane has significantly improved corrosion resistance.

The present invention relates to polyurethanes and polyurethane dispersions based on polyethers obtainable from renewable sources, particularly biomass.

The invention discloses a water-based intermediate coat composition with low-temperature stone impact resistance, water-based intermediate coat prepared from the water-based intermediate coat composition and application of the water-based intermediate coat composition. The water-based intermediate coat composition is prepared from the following components in parts by weight: 4 to 8 parts of water-based polyurethane dispersion A, 8 to 15 parts of water-based polyurethane dispersion B, 2 to 5 parts of methylated amino resin, 5 to 10 parts of mixed etherified amino resin and 0.2 to 0.4 part of phosphate adhesion promoter, wherein the hydroxyl value of the waterborne polyurethane dispersion A is lt; the acid value is 20-35 mgKOH / g, and the number-average molecular weight is gt; the particle size of the resin is 50-100nm, and the pH (Potential of Hydrogen) of the dispersion is 7.0-8.5; the hydroxyl value of the waterborne polyurethane dispersion B is 95-125 mgKOH / g, the particle size of the resin is 30-80 nm, and the pH value of the dispersion is 7.0-9.0.

The application provides a polyurethane chain extender and a high-strength polyurethane, and relates to the technical field of polyurethane.The polyurethane chain extender has the following structure, wherein R1 is C1-C6 alkylene, and R2 is H or C1-C4 alkyl.The polyurethane chain extender is applied to the preparation of polyurethane materials.Because of the presence of hydrogen bond elements, a large number of hydrogen bonds can be generated in the polyurethane, so that the mechanical properties of the polyurethane material are significantly improved, and the polyurethane chain extender can also be used as a chain extender in the preparation of water-based polyurethane dispersions.

The invention discloses a biological adhesion prevention nano-composite coating for a marine aquaculture netting and a coating process of the biological adhesion prevention nano-composite coating. The coating slurry is composed of a waterborne polyurethane dispersion, an antifouling functional filler and an auxiliary agent; the antifouling functional filler is nano microspheres formed by encapsulating capsaicin by using hydrogenated rosin as a wall material. The preparation method comprises the following steps: preparing the nano-microspheres through a specific process, and dispersing the nano-microspheres in water-based resin to obtain slurry; performing air low-temperature plasma pretreatment on the netting to improve the surface activity; and finally, coating the surface of the netting with the slurry and curing. The problems of dispersion and controllable slow release of natural hydrophobic antifouling components are solved through a nano packaging technology, and meanwhile, the ultrahigh adhesive force of the coating on a flexible hydrophobic base material is realized through a plasma interface activation technology. The two components have a synergistic effect, so that the coating has the outstanding advantages of environmental friendliness, long-acting antifouling property and firm adhesive force, and the technical bottlenecks that the traditional environment-friendly coating is easy to peel and short in service life are effectively overcome.

The invention belongs to the technical field of waterborne polyurethane dispersions, and particularly discloses a bio-based waterborne polyurethane printing adhesive and a preparation method thereof. The bio-based waterborne polyurethane printing adhesive is prepared from the following raw materials in parts by mass: # imgabs0. The bio-based waterborne polyurethane printing adhesive is prepared from bio-based polymer polyols, such as polytetrahydrofuran ether glycol and polypropylene glycol with 100% bio-based content, polycarbonate diol with 50-70% bio-based content, polyethylene glycol with 50-70% bio-based content, polyethylene glycol with 50-70% bio-based content and polyethylene glycol with 50-70% bio-based content, wherein the bio-based polymer polyols are similar to or completely identical to a petroleum-based structure; the characteristics of the traditional petroleum-based waterborne polyurethane printing adhesive are maintained; the prepared bio-based waterborne polyurethane printing adhesive has high bio-based content and is unique in the field of waterborne printing.

The invention relates to polyurethane modified casein water-based decorative paper ink and a preparation method thereof. The ink comprises the following components: pigment, water-based polyurethane / casein resin, modified silicone acrylic resin, an amino curing agent, a dispersing agent, a wetting agent, a defoaming agent, a cosolvent and the balance of water, the waterborne polyurethane / casein resin comprises a mica modified polyurethane dispersion, a cross-linking agent, a casein solution and water, wherein the mica modified polyurethane dispersion comprises the following components: organic modified mica, polyol, polyamine, a carboxyl hydrophilic monomer, polyisocyanate, a pH regulator, an end-capping reagent and water; the casein liquid comprises the following components: casein, an alkaline solubilizing substance and the balance of water. Compared with the prior art, the water-based paint has good adhesion to paper, is easy to permeate and does not decolorize during impregnation, a formed film is resistant to high temperature and good in leveling property, a good decorative effect is achieved, and the problem that a casein formed film is hard and brittle is solved.