21 results about "Polyphenyl isocyanate" patented technology

The invention relates to a preparation method of a three-dimensional graded porous carbon material, and belongs to the technical field of porous carbon materials. The preparation method comprises the following steps: mixing polyether polyol (R2305) and polymethylene polyphenyl isocyanate (PM200) according to a ratio, heating in a water bath kettle at a constant temperature to form a polyurethane mixed precursor, adding mixed powder of silicone oil, an activating agent and glucose into the precursor, uniformly mixing by mechanical stirring, then adding a catalyst, continuously uniformly stirring, and carrying out vacuum drying to obtain the polyurethane composite material. And finally, adding a certain amount of water as a foaming agent, stirring and standing to form a hardened blank, and carbonizing, activating, pickling and drying to obtain the three-dimensional graded porous carbon. The porous carbon material with the three-dimensional interconnected graded pore structure is prepared by adopting a carbonization-activation one-step method, the pore size and porosity of macropores can be regulated and controlled, the strength of a green body and a carbonized sample is effectively improved, the specific surface area of porous carbon is remarkably increased, the process is simpler, and the efficiency is higher.

The invention belongs to the technical field of polyurethane adhesives, and particularly relates to a multi-element synergistic flame-retardant bio-based polyurethane joint mixture and a preparation method thereof. Comprising the following raw materials in parts by weight: 50-60 parts of bio-based polyol I; 40 to 50 parts of bio-based polyol II; 15 to 18 parts of a foam stabilizer; 259 to 279 parts of a filling material; 5-7 parts of a catalyst; 140 to 170 parts of a propellant; 37 to 40 parts of modified isocyanate; 148 to 160 parts of polymethylene polyphenyl isocyanate; flame-retardant elements such as N, P, B and S are synergistically introduced into a molecular structure of the polyurethane joint mixture, so that the flame-retardant property and the mechanical property of the material are remarkably improved under the multi-element action; besides, the bio-based polyol is used as a main raw material for preparing the polyurethane joint mixture, so that the biodegradability of the material is improved, the carbon emission can be effectively reduced, and the pollution to the environment is reduced.

The invention belongs to the technical field of polyurethane compositions, and particularly relates to all-water foaming stone-like polyurethane foam as well as a preparation method and application thereof. The all-water foaming stone-like polyurethane foam is composed of a component A and a component B in a mass ratio of 1: (1-1.15), and the component A comprises the following raw materials: polyether polyol 1, polyether polyol 2, polyether polyol 3, a composite catalyst, a flame retardant, a surfactant and water; and the component B is polymethylene polyphenyl isocyanate. According to the all-water foaming stone-like polyurethane foam provided by the invention, polyethers with different viscosities are combined and cooperate with different types of catalysts, and an all-water foaming mode is adopted, so that the fluidity of a system is improved, the characteristic of rapid curing is maintained, bubbles on the surface of a product can be effectively eliminated, and the performance of the product is improved. The hard polyurethane product with clear texture and flat and stone-like surface is obtained; the invention also provides a preparation method thereof.

The invention relates to the technical field of sound insulation boards, in particular to a polyurethane foaming and expanded vermiculite mixed material for sound insulation. The flame-retardant polyurethane foam material comprises the following components in percentage by mass: 45-60% of polymethylene polyphenyl isocyanate, 20-35% of all-water foaming flame-retardant rigid polyurethane foam combined polyether, 15-30% of vermiculite and 2-5% of water. The preparation method comprises the following steps: 1, vermiculite preparation: weighing vermiculite according to the mass percentage, crushing, sieving with a sieve of 10-60 meshes, and adding a coupling agent for coating; 2, vermiculite and polyurethane glue are mixed according to the proportion of 85-95%: 5-15%; 3, weighing polymethylene polyphenyl isocyanate according to the mass percentage, putting the polymethylene polyphenyl isocyanate into a first mixer, and stirring for 5 minutes; and 4, weighing the all-water-blown flame-retardant rigid polyurethane foam combined polyether according to the mass percentage, putting the all-water-blown flame-retardant rigid polyurethane foam combined polyether into a second mixer, adding 2-4% of water, and mixing for 5-15 minutes. And 5, conveying the raw materials in the two mixers into a mixing chamber according to the formula proportion, mixing, spraying into a plate mold by using a spray head, scattering vermiculite into the plate mold by using a vibrating screen when half of the raw materials are sprayed, heating the plate mold to 35-60 DEG C, and carrying out secondary spraying and foaming.

The invention relates to an antibacterial polyurethane insole material and a preparation method thereof. The problems that in the prior art, the antibacterial property of a polyurethane insole material is not lasting, and the mechanical property is reduced are mainly solved. According to the technical scheme, the novel antibacterial polyurethane insole material and the preparation method thereof are adopted, the novel antibacterial polyurethane insole material is composed of a component A and a component B according to the weight fraction ratio of 100: 68-82, the component A comprises 50-60 parts by weight of polyether polyol A1, polymer polyol A2, a catalyst, a chain extender, a cross-linking agent, water, a pore opening agent and a metal complex quaternary ammonium salt antibacterial agent, and the component B comprises 50-60 parts by weight of polyether polyol A1, a polymer polyol A2, a catalyst, a chain extender, a cross-linking agent, water, a pore opening agent and a metal complex quaternary ammonium salt antibacterial agent; and the component B is a prepolymer which is based on polyether polyol A1 and is terminated by polymethylene polyphenyl isocyanate and dimethyl diphenylmethane diisocyanate, so that the problem is well solved, and the polyurethane insole material can be applied to the polyurethane insole material industry.

The invention discloses a construction method of an HPIR composite thermal insulation plate thermal insulation material, and belongs to the technical field of external wall thermal insulation systems in building structures. Aiming at the problems of potential safety hazards and poor durability of a thermal insulation system caused by insufficient comprehensive performance and non-standard construction process of a traditional thermal insulation plate material, the preparation method comprises the following steps: mixing polymethylene polyphenyl isocyanate and polyester polyol, and adding a liquid flame retardant and an intumescent flame retardant to form a component A; and mixing polyether polyol with a catalyst and a surfactant to form a component B, mixing A and B, injecting the mixture into a mold, and foaming and curing to obtain the thermal insulation board. During construction, after a building base layer is cleaned, an adhesive is smeared, a heat insulation plate is pasted, auxiliary mechanical anchoring is arranged, a seam is filled with a sealing material, and finally a polymer cement protective coating is coated. The method is mainly used for building external wall thermal insulation system construction, and the thermal insulation effect and the long-term reliability of the system can be improved.

The present application belongs to the technical field of polyurethane adhesive, and particularly relates to a multi-element synergistic flame-retardant bio-based polyurethane sealant and a preparation method thereof. The sealant comprises the following raw materials in parts by weight: bio-based polyol I: 50-60 parts; bio-based polyol II: 40-50 parts; cell uniformizing agent: 15-18 parts; filler: 259-279 parts; catalyst: 5-7 parts; propellant: 140-170 parts; modified isocyanate: 37-40 parts; and polymethylene polyphenyl isocyanate: 148-160 parts. By synergistically introducing N, P, B and S into the molecular structure of the polyurethane sealant, the flame-retardant property and mechanical property of the material are significantly improved under the action of multiple elements. In addition, using bio-based polyol as the main raw material for preparing the polyurethane sealant is not only conducive to improving the biodegradability of the material, but also can effectively reduce carbon emissions and reduce environmental pollution.

The invention belongs to the technical field of polyurethane, and particularly relates to a rigid polyurethane foam material for a high-temperature-resistant pipeline and a preparation method of the rigid polyurethane foam material. The polyurethane foam is prepared from a component A and a component B according to the mass ratio of 100: (130-150), and the component A comprises the following raw materials in percentage by mass: 7-36% of polyether polyol A; 13 to 35 percent of polyether polyol B; 13 to 37% of polyether polyol C; 3-8% of a catalyst; 3-14% of an auxiliary agent; 0.3%-4.2% of a dispersing agent; 1.3 to 2.5 percent of foam stabilizer; 6-15% of a pentane foaming agent; and the component B is polymethylene polyphenyl isocyanate. Through specific polyether compounding, nano zirconium dioxide and the dispersing agent are added, and the ratio of the component A to the component B is optimized, so that the high temperature resistance, the compression strength and the dimensional stability of the polyurethane foam are greatly improved, and the polyurethane foam is suitable for preparing a pipeline thermal insulation material.

The invention relates to the technical field of functional materials, and discloses a composition for polyurea resin, the polyurea resin and a preparation method and application of the polyurea resin. The composition for the polyurea resin comprises a prepolymer, a polyaspartic acid ester chain extender, an aromatic steric hindrance chain extender, a cross-linking agent and optional auxiliaries, wherein the prepolymer is obtained by carrying out polymerization reaction on polymethylene polyphenyl isocyanate and an end-capping reagent. The polyurea resin prepared from the composition for the polyurea resin has good tensile strength and tearing strength, meets the performance of an anti-explosion material, does not contain volatile organic solvents, is environment-friendly and does not cause harm to constructors.

The invention relates to the technical field of sound insulation boards, in particular to a polyurethane and mica mixed foaming sound insulation board for walls and floors. The flame-retardant polyurethane composite material comprises the following components in percentage by mass: 45-60% of polymethylene polyphenyl isocyanate (black material), 20-35% of all-water foaming flame-retardant rigid polyurethane foam combined polyether (white material), 18-30% of mica powder and 2-5% of water. The manufacturing method comprises the following steps: 1, weighing 45-60% by mass of polymethylene polyphenyl isocyanate, putting the polymethylene polyphenyl isocyanate into a first mixer, and stirring for 5 minutes; 2, weighing 20-35% by mass of all-water-blown flame-retardant rigid polyurethane foam combined polyether, putting the weighed all-water-blown flame-retardant rigid polyurethane foam combined polyether into a second mixer, adding 18-30% by mass of mica powder and 2-5% by mass of water, and mixing for 5-15 minutes; 3, pressurizing in a first mixer and a second mixer, conveying the two mixed raw materials into a mixing chamber through a conveying pipeline by high-pressure gas according to a formula proportion, mixing, then immediately spraying into a plate mold through a spray head for foaming, and preheating the plate mold to 35-60 DEG C; 4, after being filled with the raw materials, the plate mold is flattened through a compression roller.

This invention discloses an intumescent fire-retardant coating and its preparation method, belonging to the field of coating technology. The method includes the following steps: Step 1: Preparing expandable graphite; Step 2: Reacting expandable graphite with polymethylene polyphenyl isocyanate to obtain isocyanate graphite; Step 3: Reacting isocyanate graphite with a modifier to obtain modified graphite; Step 4: Mixing modified graphite, acrylic resin emulsion, deionized water, defoamer, and leveling agent to obtain the intumescent fire-retardant coating. This invention effectively improves the overall performance of the coating by using polymethylene polyphenyl isocyanate as a crosslinking bridge group and covalently grafting a self-synthesized modifier onto the surface of expandable graphite.

This invention discloses an environmentally friendly polyurethane grouting material for leak sealing and its preparation method. The material includes: 1-10 parts of polymethylene polyphenyl isocyanate, 8-15 parts of toluene diisocyanate, 5-10 parts of polyether triol, 40-50 parts of polyether tetraol, 30-45 parts of composite solvent, and 0.01-0.05 parts of inorganic acid. The composite solvent is composed of raw materials in a mass ratio of dibutyl phthalate: dimethyl carbonate: dipropylene glycol dimethyl ether = 1:1:(1-1.5). The method includes: weighing the raw materials; mixing polymethylene polyphenyl isocyanate, toluene diisocyanate, and inorganic acid, stirring and heating to obtain mixture A; dehydrating polyether triol and polyether tetraol under vacuum and then cooling to obtain mixture B; adding mixture A to mixture B, reacting, and then adding the composite solvent to obtain the environmentally friendly polyurethane grouting material for leak sealing. The grouting material prepared by this method has both environmental protection and high water-binding properties, and the raw materials are environmentally friendly.

The application belongs to the technical field of polyurethane sponge and specifically relates to a high-resilience sponge for mattresses and a preparation method thereof; the high-resilience sponge for mattresses comprises components A and B in a mass ratio of 100:40-60; the component A comprises, in mass parts, 100 parts of polyol, 2-5 parts of foaming agent, 0.1-0.5 parts of catalyst and 0.3-1 parts of foam stabilizer; the polyol comprises polyether polyol, polymer polyol and cashew nut shell oil phenol-formaldehyde resin polyol in a mass ratio of 6-8:1-2:0.1-0.2; the component B comprises modified isocyanate; the modified isocyanate is a mixture of polyol-modified diphenylmethane diisocyanate and polymethylene polyphenyl isocyanate. The sponge for mattresses provided by the application has high resilience and also has excellent support, durability and aging resistance.

The application provides a curing adhesive and a preparation method and application thereof. The preparation method of the curing adhesive comprises the following steps: carrying out a polymerization reaction on polyol and a first isocyanate to obtain a polymerization product; wherein the molecular weight of the polyol is greater than or equal to 2000, the temperature of the polymerization reaction is 120-130 DEG C, and the time of the polymerization reaction is 2-4 h; a second isocyanate is added into the polymerization product, and a reaction is carried out at 120-130 DEG C for 0.5-1 h to obtain the curing adhesive; wherein the second isocyanate comprises polymethylene polyphenyl isocyanate. The application can prepare a curing adhesive with excellent initial adhesion.

The invention relates to the technical field of polyurethane foam materials, and discloses a rigid polyurethane foam material and a preparation method thereof. The method comprises the following steps: reacting mixed polyol I with polymethylene polyphenyl isocyanate to obtain a prepolymer, and adding a liquid flame retardant I and a foaming agent into the prepolymer to obtain a black material; the preparation method comprises the following steps: mixing mixed polyol II, expanded graphite and a cross-linking agent, then adding melamine into the obtained mixture for several times, stirring for 5-10 minutes after adding the melamine each time, and the total stirring time is 10-30 minutes, then adding a liquid flame retardant II, standing for 10-30 hours, and then adding a foam stabilizer, a catalyst and a liquid flame retardant III to obtain a white material; and mixing the black material and the white material, and carrying out casting molding. According to the method, the stability of powder such as expanded graphite in a white material can be effectively improved, the flame retardance of the prepared rigid polyurethane foam material is improved, and the dosage of the liquid flame retardant is reduced, so that the tensile strength of the material is improved.

This invention belongs to the field of polyurethane technology, specifically relating to rigid polyurethane foam materials for high-temperature resistant pipelines and their preparation method. The polyurethane foam is made from component A and component B in a mass ratio of 100:(130~150). Component A includes the following raw materials by mass percentage: polyether polyol A: 7~36%; polyether polyol B: 13~35%; polyether polyol C: 13~37%; catalyst: 3~8%; additives: 3~14%; dispersant: 0.3~4.2%; foam stabilizer: 1.3~2.5%; pentane blowing agent: 6~15%. Component B is polymethylene polyphenyl isocyanate. By using specific polyether blends, adding nano-zirconia and dispersants, and optimizing the ratio of component A to component B, the high-temperature resistance, compressive strength, and dimensional stability of the polyurethane foam are significantly improved, making it suitable for the preparation of pipeline insulation materials.

The invention relates to the technical field of new road materials, in particular to a high-performance asphalt modifier, a preparation method of high-performance asphalt and an asphalt mixture, and the modifier is prepared from an isocyanate compound, amino-terminated polyolefin and hydroxyl-terminated polyolefin; the isocyanate compound is prepared from polymethylene polyphenyl isocyanate and isophorone diisocyanate; according to the modifier disclosed by the invention, asphalt is reinforced and toughened through physical and chemical synergism by virtue of a ureido / carbamate interpenetrating network structure formed by isocyanato and amino / hydroxyl, a swelling effect of amino-terminated polyolefin and hydroxyl-terminated polyolefin in asphalt and a strong hydrogen-bond interaction of a system. Under the condition of lower mixing amount, the prepared modified asphalt and mixture have the characteristics of high modulus and fatigue resistance.

The invention relates to the technical field of polyurethane foam, in particular to polyurethane foam capable of continuously releasing negative air ions as well as a preparation method and application of the polyurethane foam. The high-temperature-resistant polyurethane coating is prepared from the following raw materials: polyether polyol 330N, castor oil polyol, polymethylene polyphenyl isocyanate, nano tourmaline powder, cerium-doped zinc oxide composite powder, pentamethyl dipropylene triamine and polyether modified polysiloxane. In the design, the cerium-doped zinc oxide composite powder constructs a stable surface defect state in a zinc oxide lattice, and utilizes environmental heat energy to excite continuous release of low-energy electrons, so that the negative ion release capability and continuity of the polyurethane foam are effectively improved; after perfluorosilane surface modification, poisoning of water molecules to cerium-doped active sites can be effectively prevented, defect failure is avoided, meanwhile, the binding force between powder and a matrix is enhanced through physical adsorption, the falling risk is reduced, and the stability and durability of the material are remarkably improved.

The application provides a degradable polylactic acid-polyether type polyurethane foam and a preparation method thereof, and belongs to the technical field of high polymer materials. The degradable polylactic acid-polyether type polyurethane foam comprises the following raw materials in parts by mass: PLA 500 -PEG 400 -PLA 500 Polyol 50 parts, polytetrahydrofuran ether diol 50 parts, 1,4-butanediol 3.0-4.0 parts, foam stabilizer 1.0-1.5 parts, amine catalyst 0.10-0.20 parts, organic tin catalyst 0.03-0.06 parts, ethyl acetate 4.0-6.0 parts, and polymethylene polyphenyl isocyanate 50 parts. The method of the application adopts melt foaming, solves the problem that the raw materials are difficult to mix at room temperature because they are wax-like solids, and has simple process and low equipment requirement. The prepared polyurethane foam has fine and uniform cells, high closed cell rate, excellent elasticity, adjustable density, and is particularly suitable for midsoles of sports shoes, cushioning packaging, and environment-friendly shock-absorbing materials.

The application provides a moisture and heat resistant polyurethane foam potting adhesive for cylindrical battery packs and application, the polyurethane foam potting adhesive comprises two components A and B, the A component comprises antioxidant BHT-X grafted polymethylene polyphenyl isocyanate, polymethylene polyphenyl isocyanate and other isocyanate components, and the B component comprises polyether polyol, polyester polyol, catalyst, crosslinking agent, chain extender, foam stabilizer, foaming agent, flame retardant and stabilizer.The moisture and heat resistant polyurethane foam potting adhesive provided by the application can avoid performance loss caused by the migration of small molecule antioxidants in a humid and hot environment, and simultaneously has the advantages of good workability, excellent fluidity, low thermal conductivity, UL94-V0 level flame retardancy, high strength and high toughness and the like.The application also discloses an operation system for cylindrical battery potting, which can realize more uniform, complete filling, bonding and fixing of cylindrical battery packs.

This invention discloses a polyurethane potting compound, a method for preparing the polyurethane potting compound, and its applications. The polyurethane potting compound is formed by mixing and curing component A and component B. Component A comprises the following raw materials: 5-20 parts by weight of castor oil, one or two of polycaprolactone polyol and polycarbonate diol with a total mass of 5-12 parts, 5-15 parts by weight of polytetrahydrofuran diol, 49-68 parts by weight of inorganic filler, and 6-15 parts by weight of additives. Component B is a curing agent, and its raw materials include: 40-80 parts by weight of polymethylene polyphenyl isocyanate and 20-60 parts by weight of carbodiimide-modified diphenylmethane diisocyanate. This invention can reduce the internal stress of the polyurethane potting compound.