11results about How to "High initial bond strength" patented technology

The invention discloses a controllable debonding thermosetting adhesive, a preparation method of the controllable debonding thermosetting adhesive and application of the controllable debonding thermosetting adhesive in bonding and disassembling of composite materials. The preparation method comprises the following steps: S1, reacting an aldehyde monomer with an alcohol monomer to obtain a polyhydroxy intermediate containing an acetal structure; the aldehyde monomer has at least one hydroxyl functional group; the alcohol monomer has more than three hydroxyl functional groups; s2, carrying out ring-opening addition and alkaline environment ring-closing epoxidation reaction on epoxy chloropropane and the polyhydroxy intermediate to obtain an epoxy monomer containing an acetal dynamic bond; and S3, mixing and curing the epoxy monomer obtained in the step S2 and an amine curing agent to obtain the controllable debonding thermosetting adhesive under the acidic condition. The thermosetting adhesive disclosed by the invention is high in initial bonding strength and quick in debonding under an acidic condition. A composite material joint bonded by using the thermosetting adhesive disclosed by the invention is high in bonding strength and convenient to disassemble and recycle.

The invention discloses a low-viscosity high-initial-viscosity single-component moisture-curing polyurethane hot melt adhesive and a preparation method thereof, a low-viscosity system is constructed mainly through the design of raw materials and proportions, especially the design of specific liquid polyester polyol, so that the PUR prepared by the invention can be used for curing at lower temperature and higher initial viscosity. And the adhesive has higher initial bonding strength and better final bonding effect, and is particularly suitable for low-temperature compounding in the field of heat-labile / heavy substrates.

The invention provides a reactive polyurethane hot melt adhesive for laminating and compounding a low-surface-energy material and a preparation method of the reactive polyurethane hot melt adhesive, and relates to the technical field of polyurethane hot melt adhesives. Polyhydroxyl groups of the alkyl glycoside enable the alkyl glycoside to have good compatibility with polyether polyol and polyester polyol, and the polyhydroxyl groups react with isocyanate to form a certain degree of crosslinking, so that polyurethane molecules have higher cohesion strength; meanwhile, a long alkyl chain of alkyl glycoside is suspended beside a polyurethane main chain, and the polarity of the long alkyl chain is very low, so that the long alkyl chain has very good wettability on a low-surface-energy base material. Therefore, the polyurethane hot melt adhesive prepared by the invention can effectively infiltrate a base material in the actual use curing process of lamination and compounding of a low-surface-energy material, the bonding strength is not influenced by the low surface energy of the base material, and the polyurethane hot melt adhesive has relatively high initial bonding strength and relatively high final bonding strength.

The application relates to the field of dust removal technology, and specifically discloses a kind of sticky paper, preparation method and sticky roller. The sticky paper includes a substrate layer and an adhesive layer coated on the surface of the substrate layer, and the adhesive layer is made of the following components in parts by weight: 8-12 parts of styrene-butadiene-styrene block copolymer, 2.5-4.5 parts of styrene-butadiene rubber, 15-20 parts of tackifying resin, 0.5-1 parts of vinyl polysiloxane, 0.5-1 parts of hydrogen-terminated dimethylsiloxane, 0.1-0.2 parts of antioxidant, 5-10 parts of filler oil, 1-3 parts of zinc oxide, and 1-3 parts of white carbon black. The sticky paper preparation method provided in the present application is simple, low in cost, and does not contain organic solvents, which is more environmentally friendly. The sticky paper prepared in the present application is applied to the sticky roller, which is easy to use, has high initial adhesive strength and is not easy to leave marks.

The invention relates to a waterproof sealing chip hot melt adhesive and a preparation method thereof, and relates to the field of hot melt adhesives. The invention relates to a waterproof sealing chip hot melt adhesive, which comprises the following raw materials by weight: 20-35 parts of crystalline polyol; 30 to 45 parts of amorphous polyol containing a benzene ring structure; 2-7 parts of castor oil; 10 to 18 parts of aromatic diisocyanate; 2 to 4 parts of 3-isocyanate propyl triethoxy silane; 0.2 to 0.5 part of a catalyst; 4-9 parts of terpene phenolic resin; and 1-2 parts of an antioxidant. According to the packaging structure, the high temperature resistance and the waterproof performance of the hot melt adhesive can be improved, and the sealing performance and the reliability of the packaging structure in a high-temperature or humid environment are ensured.

The invention provides a low-moisture curing dealcoholization type silicone sealant and a preparation method thereof. The low-moisture curing dealcoholization type silicone sealant is prepared from the following components in parts by mass: 100 parts of alpha, omega-dihydroxy polydimethylsiloxane, 70-140 parts of nano calcium carbonate, 3-10 parts of dimethyl silicone oil, 1-4 parts of modified silicone oil, 3-10 parts of a composite cross-linking agent, 0.5-2 parts of a coupling agent A, 0.5-1.5 parts of a coupling agent B and 2-6 parts of a titanate catalyst, the coupling agent A is one or a mixture of more of gamma-glycidyl ether oxypropyl trimethoxy silane, gamma-glycidyl ether oxypropyl triethoxy silane, gamma-aminopropyl trimethoxy silane and gamma-aminopropyl methyl diethoxy silane, and the coupling agent B is one or a mixture of more of gamma-glycidyl ether oxypropyl trimethoxy silane, gamma-glycidyl ether oxypropyl triethoxy silane, gamma-aminopropyl trimethoxy silane and gamma-aminopropyl methyl diethoxy silane; the coupling agent B is one or a mixture of two of an epoxy silane oligomer and an amino silane oligomer, the structure of the coupling agent B is as shown in formulas I, II and III, and the mass ratio of the # imgabs0 # coupling agent A to the coupling agent B is (0.9-1.3): 1. The silicone sealant prepared by the method can be quickly cured, the curing time is shortened, and the construction efficiency in winter is improved.

The invention belongs to the field of rubber materials, and provides a rubber composition for a tire steel wire belt layer and a preparation method thereof, and the rubber composition comprises 70-90 parts of natural rubber, 20-40 parts of epoxidized natural rubber, 5-7 parts of a tackifying system, 50-65 parts of carbon black, 2-5 parts of an anti-aging agent, and 4-6 parts of a sulfur system. The tackifying system is prepared through a reaction of benzimidazole, a thiuram compound and omega-brominated fatty acid benzyl ester, and the omega-brominated fatty acid benzyl ester is prepared through a nucleophilic substitution reaction of omega-brominated fatty acid and benzyl bromide. Benzimidazole and a thiuram compound are bridged through a flexible aliphatic chain to form a tackifying system molecule, and the molecule can be chelated with copper / zinc / iron and other metal ions on the surface of a steel wire through a benzimidazole part, so that the initial bonding strength between rubber and the steel wire is improved; the thiuram part improves the interface stress distribution of the steel wire belt layer rubber and the steel wire, and the bonding performance of the steel wire cord fabric layer is improved.

A graft copolymer in which a (meth)acrylate-based polymer block (A) having a reactive silicon group, and a polyoxyalkylene-based polymer block (B) having a number average molecular weight of 1000 or more are bonded in the order of A-B-A. (A) is 35 to 70% by weight, and (B) is 30 to 65% by weight. (A) contains structural units derived from a (meth)acrylate (a1), and structural units derived from a chain transfer agent (a2) having a mercapto group. The content of a (meth)acrylate alkyl ester in which the number of carbon atoms of the alkyl group is 7 or more in the graft copolymer is 7% by weight or less. The sulfur atom concentration derived from (a2) in the graft copolymer is 4500 to 10000 ppm.

The present invention belongs to the field of adhesives, and relates to a UV moisture curing reactive polyurethane hot melt adhesive with high initial strength and low free isocyanate content and a preparation method thereof. The UV moisture curing reactive polyurethane hot melt adhesive comprises an acrylate modified polyurethane body, a tackifying resin and a photoinitiator, and the acrylate modified polyurethane body is prepared according to the following method: an excess of low free polyurethane prepolymer is subjected to a first nucleophilic addition reaction with a polyol polymer, and the obtained isocyanate di-terminated polyurethane prepolymer is subjected to a second nucleophilic addition reaction with a hydroxy acrylate compound. The UV moisture curing reactive polyurethane hot melt adhesive provided by the present invention has high initial bonding strength, good impact resistance and low free isocyanate content (<0.1wt%), and has broad application prospects.

The invention relates to a coal mine bio-based steel wire rope core flame-retardant conveyor belt and a manufacturing method thereof, and belongs to the technical field of conveyor belts, a core matrix adopts a blending system of bio-based polyamide elastomer and bio-based chlorosulfonated polyethylene, is derived from renewable resources, significantly reduces the carbon footprint of a product, and adopts a halogen-free flame-retardant system, so that the production cost is reduced. The environment and health risks of a halogen flame retardant are avoided, the high hydrogen bond density of the bio-based polyamide elastomer and the high polarity of the bio-based chlorosulfonated polyethylene form a synergy, and a special bonding formula of the m-methylene white system and the cobalt salt bonding accelerant is matched, so that the initial bonding strength and the bonding strength after thermal aging of the steel wire rope are enhanced, and the service life of the steel wire rope is prolonged. The problems that a steel wire rope is easily pulled out and layered in the later period of a traditional conveying belt are solved, the mechanical properties such as tensile strength and elongation at break of the covering rubber layer are superior to those of standard requirements, and heavy load impact and repeated flexing under the working conditions of long distance, large transportation volume and high speed of a coal mine can be borne.

This invention relates to the field of interlayer technology in laminated glass, and particularly to a binary composite plasticized gradient structure PVB interlayer, its preparation method, and laminated glass. The interlayer has a three-layer gradient structure, consisting of a first surface layer, a middle sound-insulating layer, and a second surface layer from the outside in. Both the first and second surface layers contain a first PVB resin and a first composite plasticizer, which includes diethylene glycol dibenzoate and 3GO. The middle sound-insulating layer contains a second PVB resin and a second composite plasticizer, which includes a mixture of diethylene glycol dibenzoate and 3GH. This invention, through innovative material formulation and structural design, provides a PVB interlayer solution that balances high weather resistance, excellent sound insulation, strong adhesion, low plasticizer migration tendency, and additional heat insulation functions. It also includes a stable and efficient preparation method, effectively overcoming the limitations of existing technologies where performance cannot be synergistically improved.