28 results about "Moisture cure polyurethane" patented technology

A moisture-curable polyurethane hot melt adhesive composition having good oleic acid resistance, especially when exposed to 100% pure oleic acid under aging condition of 65° C. and 90% relative humidity, wherein the adhesive composition comprises, consists essentially of or consists of a moisture-curable polyurethane prepolymer, the prepolymer being a reaction product of at least one amorphous polyester polyol containing an aromatic group and at least one polyisocyanate, preferably at least one polyisocyanate containing an aromatic group, wherein the aromatic group is comprised in the polyurethane prepolymer in a content of no less than 23 wt. %, preferably no less than 25 wt. %, more preferably no less than 30 wt. %.

The invention belongs to the technical field of melt adhesives, and particularly relates to polycarbonate dimer acid dihydric alcohol and a preparation method and application thereof. The number of carbonate bonds at the two ends of a molecular chain of the polycarbonate dimer acid dihydric alcohol is larger than the number of carbonate bonds in the middle of the molecular chain of the polycarbonate dimer acid dihydric alcohol; the invention relates to a castor oil dimer acid-based adhesive which comprises the following raw materials in parts by mass: 90-100 parts of castor oil dimer acid; 50 to 60 parts of a compound polycarbonate monomer; 1-2 parts of a supported catalyst; and 0.08 to 0.25 part of an antioxidant A. The polycarbonate dimer acid diol disclosed by the invention can be widely applied to synthesis of a moisture-cured polyurethane hot melt adhesive. Compared with the traditional polyester polyol, the polycarbonate dimer acid diol disclosed by the invention can obviously improve the hydrolysis resistance and flexibility of the hot melt adhesive, so that the polycarbonate dimer acid diol shows more excellent performance in various application fields.

The invention relates to an adhesive composition comprising at least one isocyanate-functional polyurethane polymer P, obtained by reacting: a) a polyol composition comprising a1) at least one polyester polyol PO1 and a2) at least one polyether polyol PO2, and b) at least one polyisocyanate PI, wherein the adhesive composition further comprises c) at least one styrene block copolymer SC and d) at least one tackifying resin TR.

To provide a laminate or the like that has excellent re-peelability short time after bonding and high interlayer adhesion. [Solution] A laminate comprising a substrate treated with active energy rays and a cured layer of a moisture-curable polyurethane hot melt resin composition, wherein the moisture-curable polyurethane hot melt resin composition contains a urethane prepolymer (i) having isocyanate groups, and the urethane prepolymer (i) is made from a polyol (A) with crystalline polyester polyol (a1) and amorphous polyester polyol (a2) as essential components, and polyisocyanate (B), and has an α value represented by the following formula (1) in the range of 8.0 to 11.0.

The invention discloses a silane coupling agent modified chain extender, a single-component polyurethane pouring sealant and a preparation method, and relates to a modified chain extender, a single-component polyurethane pouring sealant and a preparation method. The invention aims to solve the problem that the existing silane modified polyurethane technology mostly focuses on single performance optimization and lacks a system solution. The chain extender provided by the invention simultaneously contains three hydrolyzable methoxyl groups and two hydroxyl functional groups, and can solve the problems of low bonding strength and poor durability of a single-component polyurethane pouring sealant when being introduced into a single-component moisture-curing polyurethane system. The invention also discloses a single-component polyurethane pouring sealant prepared according to the silane coupling agent modified chain extender. The invention belongs to the technical field of polyurethane adhesive preparation.

The invention belongs to the technical field of polyurethane hot melt adhesives, and particularly relates to an IR moisture curing polyurethane hot melt adhesive and a preparation method thereof. The IR moisture curing polyurethane hot melt adhesive is prepared from the following components in parts by weight: 30 to 80 parts of a polyol polymer B, 10 to 40 parts of an isocyanate compound, 0.1 to 50 parts of modified polyurethane acrylate, 0.01 to 3 parts of a catalyst, 0.01 to 5 parts of up-conversion nano particles, 0.01 to 5 parts of a photoinitiator, 1 to 30 parts of thermoplastic resin and 1 to 12 parts of tackifying resin. The polyurethane hot melt adhesive provided by the invention can be suitable for non-UV light-transmitting and infrared-transmitting plastic materials, and after the product is applied to and attached to an IR light-transmitting material, the purpose of rapid fixation can be achieved by using IR illumination.

The invention relates to the technical field of high polymer materials, and discloses a moisture-curable polyurethane hot melt adhesive and a preparation method thereof, and the moisture-curable polyurethane hot melt adhesive comprises 10-20 wt% of polyester polyol; 40 wt% to 50 wt% of polyether polyol; 20 wt% to 30 wt% of tackifying resin; 10 wt% to 15 wt% of isocyanate; the particle size of the tackifying resin is 60 to 120 meshes. According to the moisture-cured polyurethane hot melt adhesive and the preparation method thereof, through optimal design of the component proportion of the moisture-cured polyurethane hot melt adhesive and the particle size of the tackifying resin, the mechanical property, the rheological property and the appearance quality are synergistically improved, the tackifying resin with the particle size range of 60-120 meshes is selected, so that the tackifying resin has good dispersity and a proper supporting effect in a polyurethane system, and the moisture-cured polyurethane hot melt adhesive is prepared. The high-temperature bonding strength can be effectively improved, meanwhile, the problems of net blocking risk and bubbling caused by overlarge particle size are avoided, and the smoothness and production stability of an adhesive layer are remarkably improved.

A hot-melt adhesive sheet comprising an adhesive layer laminated on at least one surface of a sheet-like substrate, wherein the adhesive layer is formed of a hot-melt adhesive comprising a moisture-curable polyurethane resin and an epoxy resin.

The invention discloses a preparation method of an oligomeric silsesquioxane material modified moisture-curable polyurethane hot melt adhesive, and relates to the technical field of adhesives. The hot melt adhesive is prepared from the following raw materials in parts by weight: 10 to 30 parts of polyether polyol, 20 to 40 parts of polyester polyol, 10 to 20 parts of methacrylate copolymer resin, 1 to 5 parts of color paste, 5 to 15 parts of heptaisobutyltrisilanol-polyhedral oligomeric silsesquioxane, 15 to 25 parts of diphenylmethane diisocyanate and 0.1 to 0.5 part of a catalyst, the preparation process comprises the steps of vacuum dehydration of raw materials, secondary dehydration after addition of TPOSS, MDI reaction, addition of a catalyst, stirring, discharging and the like. The glass transition temperature, the high temperature resistance, the aging resistance and the corrosion resistance of the polyurethane hot melt adhesive are remarkably improved, meanwhile, the good body mechanical property and the bonding strength to different base materials are kept, and the polyurethane hot melt adhesive can be widely applied to bonding of key components in the consumer electronics industry, the intelligent wearing industry and the automotive electronics industry.

The application discloses a kind of intelligent power cable suitable for complex environment, it is related to intelligent power cable technical field, including multiple internal conductors arranged along circumference, the internal conductor outside is sequentially provided with internal insulation barrier layer and internal insulation rubber layer, the internal insulation rubber layer outside is sequentially provided with external insulation barrier layer and external rubber protection layer, the external rubber protection layer outside is sequentially provided with spliced rubber sleeve, braided protective layer and external rubber isolation layer are covered, the present application is quickly repaired to the damage of intelligent power cable by moisture cured polyurethane cable repair glue, and the pressure inside intelligent power cable is detected in real time by hydraulic sensor, to ensure that the damage of intelligent power cable can be quickly repaired, while maintenance personnel can timely find and manually repair, to effectively improve the convenience and safety of intelligent power cable maintenance.

The invention belongs to the technical field of adhesives, and particularly relates to a macromolecular latent curing agent as well as a preparation method, application and a composition thereof. The macromolecular latent curing agent is oxazolidine modified polyacrylate, polyisocyanate, polymeric polyol, micromolecular polyol and the like react to generate hydroxyl-terminated polyurethane, then the hydroxyl-terminated polyurethane is oxidized by an oxidizing agent to generate aldehyde-terminated polyurethane, and then the aldehyde-terminated polyurethane reacts with alcohol amine to obtain the macromolecular latent curing agent. The macromolecular latent curing agent has the beneficial effects that the macromolecular latent curing agent does not need to use micromolecular aldehyde ketone raw materials, the reaction is mild and stable, the separation and purification are easy, the macromolecular latent curing agent is matched with the moisture-cured polyurethane adhesive for use, bubbles are not generated in the curing process, and the mechanical property of the moisture-cured polyurethane adhesive is not influenced after curing.

This invention provides a moisture-curing polyurethane hot melt adhesive and its preparation method. The moisture-curing polyurethane hot melt adhesive is prepared from the following raw materials in parts by weight: 40-80 parts of crystalline polyester polyol, 20-50 parts of liquid polyester polyol or biomass polyester polyol, 10-30 parts of highly crystalline polyol, 20-50 parts of polyether polyol, 20-50 parts of isocyanate, and 20-50 parts of thermoplastic resin. This moisture-curing polyurethane hot melt adhesive has high bonding strength, appropriate melt viscosity, and good water resistance.

To provide a moisture curable polyurethane hot melt resin composition which is excellent in adhesion to a thermoplastic resin layer, and low temperature flexibility.SOLUTION: A moisture curable polyurethane hot melt resin composition contains a hot melt urethane prepolymer (A) having an isocyanate group, and phosphate (B), wherein the hot melt prepolymer (A) uses polyol (a) containing 50 mass% or more of polyether polyol (a1) as a raw material, and a content of the phosphate (B) is more than 0.2 pts.mass with respect to 100 pts.mass of the hot melt urethane prepolymer (A).SELECTED DRAWING: None

A poly(meth)acrylate urethane polymer, obtained from the reaction of at least one monomeric diisocyanate and a poly(meth)acrylate polyol having an OH number in the range from 50 to 200 mg KOH / g in an NCO / OH ratio of at least 3 / 1, followed by removal of a majority of the monomeric diisocyanate by means of a suitable separation method, wherein it has an NCO content in the range from 2.5% to 8% by weight, based on the poly(meth)acrylate urethane polymer, and a residual content of unconverted monomeric diisocyanates of not more than 0.5% by weight, and to the use thereof as additive and to moisture-curing polyurethane compositions.

The invention belongs to the technical field of adhesives, and particularly relates to a composite adhesive based on air cannon filling. According to the graphene-based binder provided by the invention, through the synergistic effect of the modified graphene, the moisture-cured polyurethane and other functional material mixtures, the graphene-based binder is based on air vortex gun launching and is combined with high-speed vortex ring dynamics, electromagnetism, classical contact mechanics and application optics; the multi-modal precise strike (circuit short circuit, mechanical adhesion and visual shielding) of unmanned aerial vehicles (IP5X / IP6X) with different dustproof grades is realized, the blank of the prior art is effectively filled, and an innovative solution is provided for defense of the unmanned aerial vehicles in a complex environment.

This application discloses an integrated method for strengthening and fireproofing / corrosion prevention of joints in traditional residential timber structures, belonging to the field of traditional building protection and timber structure strengthening technology. The method includes: drilling a micropore array at a preset hole spacing in the joint strengthening area based on moisture content distribution data and coating type information; injecting supercritical carbon dioxide fluid into the joint through the micropore array to open the pore structure of the wood; adaptively adjusting the mixing parameters of a two-component moisture-curing polyurethane-epoxy hybrid adhesive according to the moisture content distribution data, and adding molecular sieve powder to the adjusted adhesive to form a modified injection material; injecting the modified injection material into the joint through the micropore array, allowing it to penetrate into the pores and microcracks of the wood and cure; and installing a prefabricated composite functional panel on the outside of the joint, ensuring its anti-corrosion slow-release layer adheres to the substrate of the timber frame joint.

To provide a method for uniformly coating a substrate with a moisture-curable polyurethane hot-melt resin.SOLUTION: The coating method includes a coating step of discharging a molten moisture-curable polyurethane hot melt resin 1 from a nozzle device 4 onto a substrate 2 to coat the polyurethane hot melt resin 1 on the substrate 2, and a heating step of heating the polyurethane hot melt resin 1 coated on the substrate 2.SELECTED DRAWING: Figure 2

The present invention provides at least one polyurethane prepolymer obtained by reacting a reactant mixture comprising: (A) (A1) a polyol mixture comprising: (a) at least one polyester polyol; and (b) at least one polyether polyol; and (A2) at least one polyisocyanate having at least two isocyanate groups in one molecule; (B) at least one (meth)acrylic polymer present in an amount of 14% by weight or less, based on the total weight of the adhesive composition; and (C) at least one amorphous polyalphaolefin having a softening point less than 100° C., present in an amount of 20% by weight or less, based on the total weight of the adhesive composition; The present invention provides a moisture-curable polyurethane hot melt adhesive composition comprising:

This utility model discloses a cable protection tube for cable protection, including a tube body with an installation opening and a shielding part corresponding to the installation opening. The tube body includes an insulation layer, a substrate, and a water-cured coating, which are stacked sequentially from the inside out. A sealing layer is provided at the bottom of the shielding part, corresponding to the insulation layer. A snap-fit ​​assembly is provided between the shielding part and the installation opening. This utility model, through the shielding part, insulation layer, substrate, water-cured coating, and sealing layer, forms a double insulation barrier with the insulation layer, effectively blocking current leakage. The shielding part and sealing layer, together with the insulation layer, reduce moisture penetration. The moisture-curing polyurethane adhesive cures in a humid environment, forming a dense waterproof layer to prevent the substrate from absorbing moisture and expanding.

The invention discloses a polyurethane epoxy composite floor which sequentially comprises a bottom layer, an elastic layer, a reinforcing layer, a transition layer, a rubber layer and a wear-resistant layer from bottom to top. The bottom layer mainly comprises solvent-free polyurethane and is formed by uniformly coating a cement floor or an asphalt floor with the solvent-free polyurethane; the elastic layer is a solvent-free moisture curing polyurethane elastic layer; the reinforcing layer is composed of fiber bodies and foaming bodies, the fiber bodies are woven to form a net-shaped structure with a plurality of gaps, the gaps of the fiber bodies are filled with the foaming bodies, the foaming bodies are rigid polyurethane foam, and the reinforcing layer is arranged to provide horizontal and transverse bending stress support for the plate through the fiber bodies. The foaming body provides longitudinal compression support for the board, so that the overall mechanical property of the floor is more excellent, meanwhile, the floor is formed by curing and shaping after the foaming reaction of the rigid polyurethane foam, and the effects of sound insulation and heat insulation are achieved.

The invention discloses polyester polyol. The polyester polyol comprises the following raw materials: A) 100 mol parts of ester of carboxylic acid or carboxylic acid derivative; b) 100 to 400 parts by mole of a polyol; and C) 10-100 mol parts of polyol containing a benzene ring and a cyclic acetal structure. The moisture-curing polyurethane adhesive prepared by taking the polyester polyol provided by the invention as a raw material has excellent bonding strength and impact toughness during use.

A moisture-curable resin composition comprising a moisture-curable urethane resin (A) as a polyol, wherein the moisture-curable urethane resin (A) is a prepolymer obtained from at least a polyol A and a polyol B with a polyisocyanate, wherein the polyol A is a linear polyol, and the polyol B is a polyol having a branched chain.

The invention discloses a lacquer cultural relic protection material and method and application, and belongs to the technical field of cultural relic protection. The invention discloses a lacquer cultural relic protection material. The lacquer cultural relic protection material comprises a first component and a second component, the first component is a paint film softening humectant; the second component is a paint film reinforcing agent; the paint film softening humectant comprises amino alcohol, absolute ethyl alcohol and a solvent A; and the paint film reinforcing agent comprises a moisture-cured polyurethane prepolymer and a solvent B. According to the invention, in-situ and rapid completion of the softening and reinforcing process is realized, secondary damages such as paint film warping and embrittlement caused by poor compatibility of a traditional physical softening agent and a subsequent reinforcing material are solved, and the repairing efficiency and the long-term stability of the paint film are remarkably improved. And the softening and reinforcing integrated material for archaeological unearthed non-saturated water lacquerware is prepared.

This invention describes a moisture-curing polyurethane composition comprising: – at least one isocyanate-functionalized polymer having a monomeric isophorone diisocyanate content of less than 0.5% by weight, obtained by reacting isophorone diisocyanate with at least one polyol; and – at least one aldolimide of formula (I). This composition exhibits low toxicity, good shelf-life stability, and rapid curing into an elastic material with low surface tack and good mechanical properties, particularly in terms of elastic modulus at high tensile strength and high elongation. It enables coatings, sealants, and adhesives to exhibit excellent stability under outdoor aging conditions and high UV loads. The aldolimide of formula (I) allows overcoming the disadvantages in curing speed, surface tack, and final strength of such compositions caused by the removal of most of the monomeric isophorone diisocyanate. The compositions of this invention are particularly suitable as elastic adhesives and / or sealants or elastic coatings, especially for outdoor applications such as roofing, flooring, or marine applications.

The invention discloses a preparation method of UV-moisture cured polyurethane polyurea resin, which is characterized by comprising the following steps: 1) reacting polyisocyanate containing uretdione groups with polyhydric alcohols and a compound 1 containing disulfide bonds and active hydrogen under the action of a catalyst 1, then, hydroxyl-containing acrylate monomers and an optional polymerization inhibitor are added for continuous reaction, and UV-curable polyurethane resin is prepared; and 2) reacting the UV-curable polyurethane resin prepared in the step 1) with a compound 2 containing amino and siloxy groups under the action of a catalyst 2 to prepare the UV-moisture-curable polyurethane polyurea resin. The self-repairing UV-moisture cured elastic polyurethane polyurea resin prepared by the invention has good mechanical properties and self-repairing and antifouling effects, and meanwhile, can show excellent moisture-resistant, water-resistant and mildew-proof properties.

The invention relates to a one-component moisture-curing polyurethane adhesive composition comprising an isocyanate-functional prepolymer obtainable by reacting (a) one or more polyisocyanates comprising diphenylmethane diisocyanate; and (b) a polyol mixture comprising (b1) a linear oxybutylene-based diol having 2 primary hydroxyl groups and (b2) a polyether triol having 3 secondary hydroxyl groups, wherein the hydroxyl groups in the polyol mixture (b) in the range of 55-75% are hydroxyl groups from the oxybutylene-based diol (b1), wherein the equivalent ratio between the isocyanate groups in (a) and the hydroxyl groups in (b) is in the range of 3.5-7.0, wherein the content of free isocyanate groups in the adhesive composition is in the range of 14-17 wt.%. The invention further relates to a method of adhering a first piece of material to a second piece of material with the adhesive composition and to an article, in particular a structural wood product, comprising a first piece of material and a second piece of material adhered with the adhesive composition.

Described herein is a process for producing polyurethane sandwich moldings including at least one core layer and at least one reinforcing fiber layer, where (i) at least one reinforcing fiber layer is applied onto a core layer and a moisture-curing polyurethane adhesive is applied to a reinforcing fiber layer, (ii) the part from (i) is placed into a mold and pressed in the mold and the moisture-curing polyurethane adhesive is cured, and (iii) the molding from (ii) is removed from the mold and optionally subjected to further operations, where the moisture-curing polyurethane adhesive is applied before or after application of the reinforcing fiber layer onto the at least one core layer and for the curing the moisture-curing polyurethane adhesive is brought into contact with water or with a solution comprising water. Also described herein are a polyurethane sandwich molding obtainable by such a process and a method of using a polyurethane sandwich molding in vehicles.