590 results about "Isocyanate compound" patented technology

The invention belongs to the technical field of optical materials, and particularly relates to an environment-friendly mercaptan optical resin material and a preparation method thereof. Comprising the following steps: (1) uniformly mixing a catalyst, a release agent and a polyisocyanate compound to prepare a mixture; (2) adding titanium dioxide nanoparticles with different particle sizes, which are modified by a polythiol compound and a sulfydryl silane coupling agent, into the mixture; and (3) heating and curing to prepare the environment-friendly mercaptan optical resin material. On the basis of small-particle-size titanium dioxide, a small amount of large-particle-size titanium dioxide is added. The large-particle-size titanium dioxide is not prone to agglomeration and good in dispersity, in the blending process, the granular large-particle-size titanium dioxide is easier to disperse, and agglomeration of small-particle-size titanium dioxide is prevented. Due to the addition of the small-particle-size titanium dioxide and the large-particle-size titanium dioxide, the mechanical strength of the mercaptan optical resin is further improved on the basis of maintaining the high refractive index of the mercaptan optical resin.

It is provided a process to modify lignocellulosic materials with lignin, and incorporating lignin and isocyanates or other wood adhesive in wood products compositions, and their composition, preparation and application for bonding wood products are disclosed. The compositions comprise lignin, derived from a variety of natural resources, isocyanate compounds containing two or more isocyanate functional groups, or other wood adhesives.

The invention relates to a preparation method and application of a silicon-based biodegradable essence microcapsule, and the preparation method of the silicon-based biodegradable essence microcapsule comprises the following steps: S1, uniformly mixing oily essence and a silicon-based mesoporous material to obtain an oil phase; dissolving an emulsifier in water to obtain a water phase; s2, mixing the oil phase and the water phase, and homogenizing to obtain an emulsion; and S3, adding a diisocyanate compound and polypropylene carbonate into the emulsion, and carrying out a stirring reaction to obtain the silicon-based biodegradable essence microcapsule. A silicon-based mesoporous material is introduced in the process of preparing the essence microcapsule by taking polypropylene carbonate as a wall material, a synergistic wrapping system of the essence microcapsule is constructed, and the volatile essence is subjected to double-layer protection by utilizing a mode of combining physical adsorption and chemical crosslinking embedding, so that the fragrance retention time of the essence is prolonged, and the fragrance retention time of the essence is prolonged. Meanwhile, the embedding rate of the microcapsule can be effectively improved, and the application of the essence microcapsule in actual production can be promoted by combining the biodegradable characteristic of the polypropylene carbonate.

The invention discloses acrylic photosensitive resin containing a carbamate group, a photosensitive resin composition and photosensitive solder resist ink, and relates to the technical field of photosensitive solder resist ink. The embodiment of the invention provides acrylic photosensitive resin containing a carbamate group. The acrylic photosensitive resin is prepared from the following raw materials: an acrylate copolymer with a side chain containing hydroxyl, an anhydride compound and an isocyanate compound, wherein the acid anhydride compound can react with part of hydroxyl on the side chain of the acrylate copolymer through an acid anhydride group to obtain acrylate grafted with the acid anhydride compound; the isocyanate compound can react with the residual part of hydroxyl on the side chain of the acrylate copolymer through the isocyanate group to obtain the acrylic photosensitive resin containing the carbamate group. When the acrylic photosensitive resin containing the carbamate group is used for photosensitive solder resist ink, the adhesion, heat resistance and flexibility of a dry film prepared from the photosensitive solder resist ink can be improved.

The invention provides a modified aspartate resin and an aqueous dispersion, and relates to the technical field of aqueous emulsions. The modified aspartic ester resin is obtained by reacting hydrophilic aspartic ester resin with a polyisocyanate compound and then reacting with hydrophobic aspartic ester resin, has moderate hydrophilicity and can be self-emulsified and dispersed in water to form an aqueous dispersion, and a coating cured by the aqueous dispersion is relatively good in water resistance.

The invention discloses a graphite block glassy carbon coating preparation method and a composite material. The graphite block glassy carbon coating preparation method comprises the following steps: roughening the surface of a graphite block; adding fumed silica and an isocyanate compound into the phenolic resin solution to obtain a modified resin solution; respectively preparing a first coating material, a second coating material and a third coating material based on the modified resin solution, the graphite powder and the carbon nanotubes; sequentially coating the three coating materials on the surface of a graphite block, and carrying out cross-linking curing to obtain a multi-layer coating structure; performing segmented pyrolysis on the multi-layer coating structure in an argon atmosphere to obtain a glassy carbon coating; and carrying out surface sanding on the glassy carbon coating, dipping the glassy carbon coating in a phenolic resin solution, and then carrying out heat treatment to obtain the surface-modified glassy carbon coating. By means of the multi-layer coating structure design and the segmented pyrolysis technology, the technical problems that in the traditional glassy carbon coating preparation process, the coating quality stability is poor, and the oxidation resistance is insufficient are solved, and the prepared glassy carbon coating has the advantages of being high in bonding strength, excellent in oxidation resistance and the like.

The invention provides a resin composition as well as a cured film and application thereof. The resin composition comprises alkali-soluble acrylic resin, a photopolymerization monomer, a photoinitiator and a coloring agent, the coloring agent comprises modified TiO2, and the modified TiO2 is TiO2 which is subjected to graft modification by an isocyanate compound and a silane coupling agent. According to the invention, by grafting a small molecule compound with an isocyanate group on the surface of the titanium dioxide, the compatibility of the titanium dioxide is improved, and the crosslinking degree is improved; and the crosslinking degree and the heat resistance are improved through the reaction of isocyanate groups and hydroxyl groups in the system.

The present invention provides: a packaging material which is excellent in terms of breaking resistance and easy tearability; a polyisocyanate composition which is suitable for the manufacturing of this packaging material; and an adhesive.　The present invention specifically provides a polyisocyanate composition (X) which contains a polyisocyanate compound (A), wherein: the polyisocyanate compound (A) contains 60 mass% or more of a bifunctional polyisocyanate compound (A1) that is derived from a non-aromatic diisocyanate; a polyol mixture contains 70 ± 1 mass% of a polypropylene diol that has a hydroxyl value-based number average molecular weight of 415 ± 20 and 30 ± 1 mass% of a polypropylene triol that has a number average molecular weight of 415 ± 35; a coating film, which is obtained by curing with the molar ratio [NCO] / [OH] of the isocyanate groups of the polyisocyanate compound (A) to the hydroxyl groups of the polyol mixture being 1.3 ± 0.1, has an elongation at break of 30% or more as determined at a tensile rate of 200 mm / minute at 25°C and a humidity of 40%.

The objective of the present invention is to provide a decorative sheet that has all of the following properties: workability in three-dimensional molding, adhesion to a substrate, and scratch resistance on the surface. [Solution] A three-dimensionally moldable decorative sheet having at least a resin substrate layer and a surface protective layer, wherein the surface protective layer is made of a cured product of a resin composition containing an ultraviolet-curable resin (A) and a thermosetting resin (B) in a mass ratio of 30:70 to 60:40, the ultraviolet-curable resin (A) being one or more urethane (meth)acrylates selected from polyesters, polyethers, and polycarbonates, each having 2 to 3 functional groups, and the cured product having a pencil hardness of HB to 4B, and the thermosetting resin (B) being made of an acrylic polyol resin and a polyisocyanate compound as a curing agent.

The invention provides a foamed polyurethane material and application thereof, and relates to the technical field of foamed polyurethane materials. The foaming type polyurethane material is composed of a component A and a component B. The component A comprises the following raw material components: 100 parts of polymer dihydric alcohol, 1-8 parts of a chain extender, 1-3 parts of a catalyst, 1-5 parts of modified silicone oil and 0.5-2 parts of water. And the component B is a polyisocyanate compound. Wherein the structure of the modified silicone oil contains a hydrophilic polyethylene glycol chain segment and an anthraquinone structure, so that the denitrification performance of the foaming type polyurethane material on nitrogen-containing sewage is improved.

The present application provides an electrolyte additive, an electrolyte and a battery, wherein the electrolyte additive includes a first additive and a second additive; the first additive includes a compound represented by formula I: R1, R2 and R3 each independently include any one of H, F, C1-C4 alkyl, C1-C4 fluoroalkyl, C2-C4 alkenyl, C2-C4 fluoroalkenyl, C2-C4 alkynyl, C5-C7 cycloalkane, R4 substituted phenyl and R5 substituted benzyl; R4 and R5 are each independently selected from H, C1-C4 alkyl, C2-C4 alkenyl, C2-C4 alkynyl, C1-C4 fluoroalkyl, C 2‑ Any one of a C4 fluoroalkenyl group and a C2-C4 fluoroalkynyl group; the second additive comprises an isocyanate compound. The electrolyte additive of the present application forms an interfacial film on the electrode surface that is highly stable, smooth, uniform in thickness, flexible, highly conductive, and corrosion-resistant, resulting in excellent cycling stability and high-temperature storage performance under high-voltage conditions.

To provide a two-part curing type composition for coating the inner wall of a city water pipe, which exhibits excellent curing properties inside the city water pipe and forms a coating layer having excellent mechanical properties after being cured.SOLUTION: The present disclosure provides a two-part curing type composition for coating the inner wall of a city water pipe, which comprises a main agent (A) and a curing agent (B) and cures by contact between the agent (A) and the agent (B) to thereby coat the inner wall of the city water pipe. In the two-part curing type composition, the main agent (A) includes a urethane prepolymer having an isocyanate group, the prepolymer is produced from an isocyanate compound and a first polyhydric alcohol compound as reaction raw materials, and has a viscosity of 10 mPa s or more and 500,000 mPa s or less at 25°C, and the curing agent (B) contains an amine compound and a second polyhydric alcohol compound, and has a viscosity of 100 mPa s or more and 50,000 mPa s or less at 25°C.SELECTED DRAWING: None

The present invention provides a two-component composition that suppresses dripping during spray application, has high thermal insulation properties, excellent smoothness, and high interlayer adhesion strength for spray-applied polyurethane foam roofing. [Solution] A two-component composition for spray-applied polyurethane foam for roofs, comprising: liquid A containing a polyol, a catalyst, and a blowing agent; and liquid B containing an isocyanate compound, wherein the catalyst includes a foaming catalyst and a resinification catalyst (excluding a metal catalyst), and the blowing agent includes a hydrochlorofluoroolefin and does not include the metal catalyst which is the resinification catalyst, or a trimerizing catalyst.

This application belongs to the technical field of grouting materials for tunnel engineering, specifically relating to a grouting material suitable for tunnel rock strata reinforcement and its preparation method. It includes component A and component B; by weight, component A comprises: 75-85 parts of a first base material, 10-20 parts of a coupling agent, and 2-5 parts of a catalyst; component B comprises: 70-80 parts of a second base material and 15-25 parts of a modifying accelerator; wherein, the first base material is a water glass solution, and the physicochemical properties of the water glass solution meet the following conditions: modulus > 2.5, Baume degree < 40°Bé; the second base material is composed of isocyanate compounds and glycidyl etheroxypropyl cage-like polysilsesquioxane in a weight ratio of 100:(11-23); the modifying accelerator includes polyvinylpyrrolidone and dicarboxylic acid alkyl ester compounds. The two base materials synergistically cure at low temperature to form a highly cross-linked organic-inorganic composite network, thereby significantly improving the compressive strength of the solidified body.

To provide a polyacetal resin composition which can further improve physical properties such as mechanical strength and hot water resistance, while using a modified cross-section glass fiber, when being colored by black, particularly, carbon black.SOLUTION: A polyacetal resin composition contains, with respect to 100 pts.mass of (A) a polyacetal resin, 1 to 100 pts.mass of (B) a modified cross-section glass fiber which is surface-treated with (B1) at least one selected from at least one isocyanate compound selected from the group consisting of a blocked isocyanate compound and a polyurethane resin, an amino silane coupling agent, an epoxy resin, and an acid copolymer, and (B2) a boric acid compound, and 0.001 to 3 pts.mass of (C) at least one binder selected from the group consisting of an organometallic compound containing a metal selected from Sn, Zn and PB, a boric acid compound and a quaternary onium salt compound.SELECTED DRAWING: None

Provided are a backing material for an ultrasonic probe, an ultrasonic probe, an ultrasonic diagnostic device, and a curable resin composition, the backing material comprising thermally conductive particles and a resin, the resin comprising any one of the following (A)-(C): (A) a reaction cured product of an epoxy resin having a polyurethane structure and a polyamine compound; (B) a reaction cured product of an epoxy resin and a polyamine compound and having a polyether structure; and (C) a reaction cured product of a polyisocyanate compound and a polyamine compound, the loss tangent of the resin in the range of 0-50 DEG C is 0.06 or more, the loss tangent in the range of-20-110 DEG C is less than 1.50, the storage modulus of the backing material in the range of 0-50 DEG C is 1000 MPa or more, and the content of the resin in the backing material is 25-50 vol%.

To provide an aqueous adhesive composition that enables adhesion between adherends in a short time even when used in a low-temperature environment.SOLUTION: The aqueous adhesive composition of the present invention comprises: a main agent that comprises (A) polyvinyl alcohol; (B) an ethylene-vinyl acetate copolymer resin; and (C) a styrene-butadiene copolymer resin having a functional group capable of reacting with an isocyanate, where the content ratio of the (C) styrene-butadiene copolymer resin (solid content) is 20 mass% or more relative to 100 mass% of the total solid content of (A) to (C); and a curing agent containing an isocyanate compound.SELECTED DRAWING: None

The invention discloses a modified polyurethane adhesive, and relates to the technical field of high polymer materials. The invention relates to a modified polyurethane adhesive which is prepared from the following raw materials in parts by weight through reaction: 70-90 parts of polyether polyol, 8-12 parts of an isocyanate compound, 5-10 parts of an organic silicon modifier, 2-5 parts of a weather-resistant stabilizer, 4-7 parts of nano filler, 3-8 parts of a chain extender and 1-4 parts of a catalyst. By introducing the weather-resistant stabilizer with a specific structure, the damage of ultraviolet light and free radicals to a polyurethane molecular chain is effectively blocked, so that the weather resistance and the aging resistance of the adhesive are remarkably improved, and the service life of the adhesive is prolonged.

A thermoplastic polyurethane resin elastomer is obtained by reacting an isocyanate compound (I), an aliphatic alcohol (II) having a number average molecular weight determined from the hydroxyl value of less than 300 and having only a hydroxyl group as a functional group, and a polyol (III) having a number average molecular weight determined from the hydroxyl value of not less than 300 and not more than 10,000. The isocyanate compound (I) includes not less than 90 mol % in total of an aliphatic isocyanate compound containing two isocyanate groups and / or an alicyclic isocyanate compound containing two isocyanate groups. The aliphatic alcohol (II) includes not less than 90 mol % of a C12 or lower aliphatic diol. The polyol (III) includes not less than 80 mol % of a copolymerized polycarbonate diol (IIIA) including a linear repeating structural unit represented by formula (A) and a repeating structural unit represented by formula (B).

The application discloses a kind of high-temperature phase change cooling-self-repairing dual-function microcapsules and its application, belong to intelligent road material field.The preparation method of the microcapsule includes: high-temperature phase change core material, aromatic oil asphalt regenerant and polyisocyanate compound are mixed to prepare oil phase;Afterwards, the oil phase is added to aqueous phase, and after mixing, it is reacted under the condition of 60~70 DEG C, after reaction is completed, the precipitate is collected, and the precipitate is washed with water and ethanol, and then dried to obtain the microcapsule;The preparation of the high-temperature phase change core material includes: mixing tricosane and tetracosane under the condition of 60~70 DEG C, and then cooling to room temperature to obtain high-temperature phase change core material;The aqueous phase is non-ionic emulsifier aqueous solution.The application effectively reduces the temperature of pavement by phase change endothermic, and relieves rut and aging;At the same time, the regenerant in core material can be released when crack occurs, to realize self-repairing.The application significantly improves the rut resistance, durability and service life of asphalt pavement in high-temperature area.

The invention relates to the bonding of one or more strands of Glass-Resin composite, abbreviated to "CVR", characterized in that it comprises the following steps: a) a step of pre-adhesion of one or more strands of CVR composite is carried out by dipping the strand(s) in a first aqueous bath comprising a composition based on: - an epoxy compound; and - a blocked diisocyanate compound; b) a step of deposition on the strand(s) of CVR composite is carried out by dipping the strand(s) of CVR composite in a second bath comprising an aqueous adhesive composition based on: - at least one compound A1, the compound A1 comprising at least one aldehyde function, - at least one phenol A21;- at least one unsaturated elastomer latex comprising at least one elastomer chosen from the group consisting of butadiene copolymers, styrene-butadiene copolymers, vinylpyridine-styrene-butadiene terpolymers, natural rubber with the exception of chlorinated natural rubber, and mixtures of these elastomers;The content of blocked diisocyanate compound in the aqueous adhesive composition of the second bath is at a mass rate strictly less than 0.50%.;

This invention provides a boot-shaped press belt with suppressed strength imbalances between components and excellent strength, as well as a method for preparing the boot-shaped press belt. A boot-shaped press belt for a paper machine has at least one resin layer comprising a polyurethane resin containing an isocyanate prepolymer cured by a curing agent having active hydrogen groups. The urethane prepolymer is obtained by reacting a polyisocyanate compound containing 4,4'-methylenebis(phenyl isocyanate) with a polyol compound containing polytetramethylene ether diol. The curing agent comprises polycarbonate diol.

To provide a urethane resin composition that can give a polyurethane foam having excellent incombustibility.SOLUTION: A urethane resin composition contains a polyol compound, a polyisocyanate compound, a flame retardant, a foamer, and a catalyst. When a polyurethane foam comprising the urethane resin composition is subjected to a cone calorimeter test in accordance with the ISO-5660 test method, the gross calorific value X up to 0-1200 seconds is 8 MJ / m2 or less, while the gross calorific value Y up to 0-60 seconds is less than 30% of the gross calorific value X up to 0-1200 seconds.SELECTED DRAWING: None

To provide a pressure-sensitive adhesive composition having anti-static performance and an excellent balance of adhesive strength between low and high speed peeling regions, and further being excellent in durability, reworkability, and anti-static property, a pressure-sensitive adhesive film, and a surface protective film of a polarizing plate.SOLUTION: A pressure-sensitive adhesive composition is formed of a copolymer containing a (meth)acrylate ester monomer having a 4-10C alkyl group (A), a hydroxy group-containing copolymerizable monomer (B), a carboxy group-containing copolymerizable monomer (C), and a polyalkylene glycol mono(meth)acrylate monomer (D), and further contains a 3 or more functional isocyanate compound (E), an anti-static agent (H), and a polyether-modified siloxane compound (I), and weight ratios of them based on (A) 100 are (B) 0.1-5.0, (C) 0.35-1.0, and (D) 1-20, and those based on copolymer 100 are (E) 0.5-5.0 and (I) 0.01-0.5.SELECTED DRAWING: None

The present invention relates to an aqueous composition for preparing a coating comprising a rheology control agent comprising a urethane polymer. The reagents are discontinuously prepared by a polymerization reaction of diisocyanate compounds and polyhydroxylated compounds followed by a termination reaction of prepolymers of these compounds with monohydric alcohols. The agent mainly comprises a urethane polymer strictly comprising more than three polyhydroxylated compound groups.

A urea-containing polyurethane acrylate resin is provided, which is prepared by: amide-forming the isocyanate groups in a polyurethane acrylate polymer with an amine compound to form urea groups, wherein the polyurethane acrylate polymer is prepared by reacting a hydroxyl-containing (meth)acrylate compound with a urethane prepolymer, the urethane prepolymer is prepared by reacting an isocyanate compound with a polyol compound, and the equivalent ratio of the isocyanate groups in the isocyanate compound to the hydroxyl groups in the polyol compound is 15:1 to 1:1. A urea-containing polyurethane acrylate resin, a composite material, and a method for preparing a composite material are also provided.

To provide a photosensitive resin composition capable of forming a polyimide resin film with excellent photolithography properties and storage stability, as well as excellent mechanical properties and chemical resistance, and a method for manufacturing a patterned polyimide resin film using the photosensitive resin composition. [Solution] A photosensitive resin composition comprising a reaction product (A) of a polyimide resin precursor (A1) having a specific structural unit and an isocyanate compound (A2) having a (meth)acryloyl group, a thermobase generator (B) that generates imidazole upon heating, and a photoradical polymerization initiator (C).

This invention provides a method for recycling packaging used in food packaging and other applications, as well as laminates used in the manufacture of such packaging. [Solution] A recycling method comprising a peeling step of immersing a laminate, which includes a first substrate, a second substrate, and an adhesive layer for bonding the first substrate and the second substrate, wherein the adhesive layer is a cured coating film of a two-component curing adhesive consisting of a polyol composition and a polyisocyanate composition containing a polyisocyanate compound, in a release agent to peel off the first substrate and the second substrate.

This application relates to the field of epoxy resins, and more particularly to a flexible, yellowing-resistant epoxy resin composition, its preparation method, and its application. The flexible, yellowing-resistant epoxy resin composition comprises one or more carbocyclic compounds represented by general formula (I) and one or more carbocyclic compounds represented by general formula (II); in general formulas (I) and (II): R1 and R2 are each independently selected from -H or C1-C. 20 The alkyl chain; R3 is independently selected from isocyanate compounds having two -NCO groups in the molecule; R4 is selected from polyhydroxy compounds containing -OH in the molecule. The flexible, yellowing-resistant epoxy resin composition of this application, in addition to having excellent molecular flexibility and solving the problems of warping, cracking, shrinkage, and defects caused by epoxy brittleness, can also maintain its original yellowing resistance.

The present invention provides a two-component curing adhesive that suppresses appearance defects even when used as a solvent-free adhesive in the manufacture of barrier substrates. A two-component curing adhesive comprising a polyisocyanate composition (X) containing a polyisocyanate compound (A) and an isocyanate-reactive composition (Y) containing a polyol compound (B), wherein the polyisocyanate compound (A) comprises a polyurethane polyisocyanate (A1), which is a reaction product of toluene diisocyanate and a polyol, and a hexamethylene diisocyanate derivative (A2), and the content of diisocyanate monomer in the polyisocyanate composition (X) is 1.0% by mass or less.