52 results about "Moisture cure polyurethane" patented technology

The preparation method comprises the following steps: dissolving a boric acid monomer in an organic solvent, adding monomers containing vicinal diol and primary alcohol at the same time, then adding a water removal agent, heating to 60-80 DEG C, and carrying out condensation reflux to obtain a mixed solution containing a boric acid ester chain extender; removing the organic solvent from the mixed solution containing the boric acid ester chain extender, and washing with a low-boiling-point solvent to obtain a chain extender containing a single boric acid ester bond; the preparation method comprises the following steps: reacting a chain extender containing a single boric acid ester bond, an organic metal or tertiary amine catalyst, polyether polyol and diisocyanate to obtain a single-component moisture-cured polyurethane prepolymer with the-NCO reservation amount of 4-8wt.%, and curing. The single-component moisture-curable polyurethane has excellent mechanical properties, the phenomena that the mechanical properties are reduced and the self-repairing efficiency is reduced after repeated damage-repairing are avoided, the safety and reliability of the material are greatly improved, and the service life is prolonged.

The invention belongs to the technical field of hot melt adhesives, and relates to a damp-heat-resistant bio-based moisture-curing polyurethane hot melt adhesive, which is prepared from bio-based polyol A, bio-based polyether polyol B, an antioxidant, a flatting agent, isocyanate, a coupling agent and an organic amine catalyst. Wherein the bio-based polyol A is prepared by taking itaconic acid and bio-based diol as raw materials, cooperating with a polymerization inhibitor, synthesizing bio-based polyester diol with the number-average molecular weight of 2500-4000 under the action of a second catalyst, and carrying out addition reaction on double bonds on a side chain of the bio-based polyol A and an n-octyl Grignard reagent under the action of a third catalyst, therefore, the bio-based polyol has a long-chain side group. According to the preparation method, itaconic acid and biological dihydric alcohol are used as raw materials to be matched with an n-octyl Grignard reagent to prepare bio-based polyester polyol with a long-chain side group, the bio-based polyester polyol is applied to the moisture-curing polyurethane hot melt adhesive, and the moisture-curing polyurethane hot melt adhesive with excellent moisture and heat resistance is obtained.

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. %.

A polyester urethane polymer containing isocyanate groups and being liquid at ambient temperature, obtained by reacting at least one monomeric diisocyanate and dimer fatty acid-based polyester diol having OH-number ranging between 28 and 120 mg KOH / g in NCO / OH ratio of at least 3 / 1, and by subsequently removing large part of monomeric diisocyanate by means of suitable separation process, wherein polymer has NCO content ranging between 1.5 and 6% by wt. and maximum monomeric diisocyanate content of 0.5% by wt. The polymer permits the production of moisture-curing polyurethane compositions for application in ambient temperatures, having improved properties in terms of open time, adhesion, application and weather resistance, with unchanged good properties of storage stability, curing rate, strength, ductility, elasticity and hazardous material classification. Compositions of this type are particularly suitable for use as elastic adhesives in replacement glass for vehicles.

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 discloses a preparation method of a special partially-closed type pur hot melt adhesive for veneering decorative paper, which comprises the following steps: by taking crystalline polyester polyol, polyether polyol, acrylic resin, isocyanate and the like as raw materials, setting parameters such as reaction material ratio, reaction time length, reaction temperature and the like, and closing a part of NCO groups by utilizing an isocyanate sealing agent, thereby obtaining the partially-closed type pur hot melt adhesive for veneering decorative paper. After the pur glue is coated on the facing paper, the unclosed NCO group and water vapor on the facing paper form crosslinking and effective bonding, and after long-term storage and transportation, the closed-NCO group is unclosed through high temperature when the facing paper and a plate are hot-pressed, and the bonding effect with the plate is formed. The solid content of the pur hot melt adhesive prepared by the scheme is 100%, the pur hot melt adhesive is high in initial adhesion and final adhesion strength, good in stripping resistance and dense in adhesion, can be exposed in air for a long time after being coated into an adhesive film, and can be widely applied to veneering decoration of furniture and decorative plates.

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 belongs to the technical field of a single-component polyurethane adhesive, and relates to a reactive moisture-curable single-component polyurethane structural adhesive capable of being applied at normal temperature and a preparation method of the reactive moisture-curable single-component polyurethane structural adhesive. According to the prepared single-component polyurethane structural adhesive, the tedious process of heating and sizing a conventional moisture curing polyurethane hot melt adhesive is omitted, so that the single-component polyurethane structural adhesive is convenient to use; compared with the prior art, the polyurethane adhesive has the advantages that the characteristic of high reliability of the polyurethane adhesive is considered, certain initial curing strength can be achieved in a short time, the transfer and process requirements are met, in addition, heating curing is not needed, the good bonding capacity for PC materials is achieved, and the bonding requirements in multiple scenes can be met.

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 discloses a single-component moisture-curing polyurethane hot melt adhesive and a preparation method thereof, and mainly through the design of raw materials and proportions, especially the design of specific liquid polyester polyol, the polyurethane hot melt adhesive prepared by the invention has the advantages that on the premise of ensuring the final bonding effect, the moisture-curing effect is good, and the moisture-curing effect is good. Meanwhile, the adhesive has the characteristics of low viscosity, high initial viscosity and soft hand feeling after curing, can be applied to sizing at low temperature, and is very suitable for bonding and compounding application of light and thin / sensitization type high-grade base materials.

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.

Provided is a moisture curable polyurethane composition that is a moisture curable polyurethane having an isocyanate group on one end of a molecule thereof. The moisture curable polyurethane composition contains a moisture curable polyurethane (A) and an organic solvent (B). The moisture curable polyurethane (A) is obtainable by reacting a polyisocyanate compound having at least two isocyanate groups in a molecule thereof (A1) with a low-molecular weight polyol compound having at least two hydroxyl groups in a molecule thereof and having a number average molecular weight of 50-300 (A2). Also provided is a laminate including an optical substrate and a polyurethane resin layer comprising the moisture curable polyurethane composition.

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.

A one-component moisture-curing polyurethane adhesive composition is provided, comprising an isocyanate-functional prepolymer obtainable by reacting (a) one or more polyisocyanates comprising methyl diphenyl diisocyanate; and (b) a polyol mixture comprising (b1) a linear butylene oxide-based diol with two primary hydroxyl groups; and (b2) a polyether triol with three secondary hydroxyl groups wherein 55 to 75% of the hydroxyl groups in polyol mixture (b) are hydroxyl groups from butylene oxide-based diol (b1), wherein the equivalent ratio between isocyanate groups in (a) and hydroxyl groups in (b) is in the range of from 3.5 to 7.0, and wherein the content of free isocyanate groups in the adhesive composition is in the range of from 14 to 17 wt %. A method of bonding a first piece of material to a second piece of material using such adhesive composition, and an object made using the method, are also provided.

The invention relates to an adhesive composition. The composition may include a prepolymer comprising a reaction product of a 1st polyol and a polymeric isocyanate. The polyol may have a number average molecular of at least about 2000 Daltons. The 1st polyol may also have a hydroxyl functionality of at least about 2.0. The polymeric isocyanate may have a functionality of at least about 2.8, preferably, optionally a 4,4' MDI monomeric content of less than about 50 wt%, and optionally a 2,4' MDI monomeric content of less than about 30 wt%. Optionally, the adhesive composition may include a curative having a 2nd polyol. The 2nd polyol may be the same or different than the 1st polyol. For embodiments that include the curative a weight ratio of the prepolymer to the curative may comprise up to about 10:1. A wt% of the polymeric isocyanate in the adhesive composition based on the amount of the polymeric isocyanate, the 1st polyol and the 2nd polyol, when present, comprises more than 60%.

The invention relates to the technical field of hot melt adhesives, and relates to a moisture-curable polyurethane hot melt adhesive and a preparation method thereof, the moisture-curable polyurethane hot melt adhesive comprises the following components by weight: 20 to 60 parts of polyether polyol, 30 to 50 parts of polyester polyol, 0.2 to 0.8 part of an antioxidant, 0.5 to 1.0 part of a leveling agent, 25 to 45 parts of isocyanate, 0.5 to 1.2 parts of a coupling agent, and 0.05 to 0.25 part of an organic amine catalyst; and the isocyanate is m-xylylene dimethyl isocyanate. According to the moisture-curing hot melt adhesive disclosed by the invention, through selection of the polyol and the isocyanate and proper proportion design, the moisture-curing hot melt adhesive not only has excellent bonding strength and flexibility, but also has excellent yellowing resistance, so that the problem that the existing moisture-curing hot melt adhesive cannot simultaneously give consideration to yellowing resistance and adhesion is solved, and the moisture-curing hot melt adhesive is suitable for practical application conditions.

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 present invention relates to a one-component moisture-curable polyurethane sealant composition comprising an isocyanate-terminated polyurethane prepolymer wherein the isocyanate-terminated polyurethane prepolymer has an NCO group content of 1.8 to 4.0 wt%, based on the total weight of the isocyanate-terminated polyurethane prepolymer; an effective amount of a cross-linking agent, wherein the functionality of the cross-linking agent is 3; an effective amount of a catalyst; and a silane coupling agent, wherein the molar ratio of the silane coupling agent to the NCO group of the isocyanate-terminated polyurethane prepolymer is from 40: 100 to 120: 100.

The invention discloses a moisture-curable polyurethane and polyvinyl alcohol mixed adhesive and a preparation method and application thereof, and belongs to the field of adhesives, the adhesive is prepared from the following raw materials by mass: 20-80 parts of a polyvinyl alcohol solution, 20-80 parts of a polyurethane adhesive, 15 parts of a dispersant, 9 parts of a plasticizer, and 5 parts of a cross-linking agent. Slowly adding the weighed polyurethane adhesive into the polyvinyl alcohol solution, and then sequentially adding the dispersing agent, the plasticizer and the cross-linking agent; and uniformly stirring for 15-30 minutes to form a uniform mixed adhesive. And transferring the uniformly stirred mixed adhesive into a closed container, sealing, standing for 24 hours in a normal-temperature environment, and fully reacting to obtain the moisture-cured polyurethane and polyvinyl alcohol mixed adhesive.

The present invention belongs to the field of polymer chemistry, and particularly relates to a reactive moisture-curing polyurethane hot melt adhesive with high moisture permeability. This hot melt adhesive is prepared by reacting an isocyanate component and an isocyanate-reactive component comprising the following parts by mass: The isocyanate component is: 20 to 35 parts by mass of isocyanate; The isocyanate-reactive component includes: at least one polyether polyol 35 to 45 parts by mass; at least one polyester polyol 10 to 25 parts by mass; at least one secondary amine group-containing polyether 5 to 10 parts by mass; chain extender 3 to 8 parts by mass. The reactive moisture-curing polyurethane hot melt adhesive of the present invention has excellent moisture permeability, high bonding strength, and excellent water washing resistance.

The invention provides polyester polyol for a moisture-curing polyurethane hot melt adhesive as well as a preparation method and application of the polyester polyol. The polyester polyol is prepared from carboxylic acid and / or carboxylic acid derivative and polyol through esterification reaction, and the polyester polyol contains 20-300ppm of enol compound by mass. The moisture-curing polyurethane hot melt adhesive prepared from the polyester polyol has high viscosity stability at high temperature, and can be used for preparing moisture-curing reaction type polyurethane hot melt adhesive and the like.

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.

The present invention discloses a moisture-curing reactive polyurethane hot melt adhesive and its preparation method and application. The raw materials for preparing the moisture-curing polyurethane hot melt adhesive, calculated by weight percentage, include the following components: polyether polyol, crystalline polyester polyol, vegetable oil-modified liquid polyester polyol, isocyanate, poly(meth)acrylic resin, catalyst, leveling agent, phosphate ester and antioxidant for preparation. The moisture-curing reactive polyurethane hot melt adhesive of the present invention can effectively improve the wettability of the hot melt adhesive to low surface energy substrates in the field of woodworking PUR, and at the same time overcome the difficulties such as glue stratification and particles caused by the reduced system compatibility due to the addition of low-polarity raw materials.

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.