142results about How to "High initial bond strength" patented technology

A polyester polyol prepared from a composition including a phthalic acid based material containing more than 10% by weight of ortho-phahalic or derivatives thereof, an aliphatic dicarboxylic acid (e.g., dodecanedioic acid), and a polyol (e.g., a glycol). A polyurethane adhesive, such as a polyurethane reactive hot-melt adhesive, is made using the polyester polyol, which exhibits improved initial bonding strength, shortened setting time, and ability to bond to low surface energy substrates such as ABS. The methods to prepare the polyester polyol and the polyurethane adhesive, and the method to use them are also disclosed.

The invention discloses a boiling resistant polyurethane adhesive and method for preparing same, wherein the adhesive comprises by weight ratio 50-90% of main component and 10-50% of curing agent, the main component comprises (A) polyether polyol with hydroxyl value being 10-30mgKOH/g and (B) polyester polyol with hydroxyl value being 30-100mgKOH/g, the curing agent is polyisocyanate prepolymer. The adhesive can be applied for an intaglio gluing dry-type compounding machine.

The invention discloses water-based composite adhesive, which contains acrylate emulsion and a cross-linking agent, wherein the weight of the cross-linking agent is 0.1-6 percent of the weight of the acrylate emulsion; the cross-linking agent is any one or a mixture of hexamethylenediamine and adipic acid dihydrazide; and the acrylate emulsion is formed by copolymerizing a terpenes hard monomer, a terpenes soft monomer, a terpenes carboxylic acid monomer, a terpenes functional monomer, a dual-vinyl monomer and a terpenes cross-linking monomer through nuclear shells under an emulsion system. The adhesive is particularly suitable for dry-type composite adhesion between flexible package composite base materials such as a plastic film and a vacuum aluminized film which are processed through corona; has good leveling, fast drying, high transparency, capability of curing at room temperature, high initial strength, excellent peel strength, difficulty in mesh clogging and skinning, wide adaptability and low cost; and can be applied to various machine types, does not contain any organic solvent, can replace solvent adhesive at present completely, and belongs to environment friendly adhesive.

The invention provides an adhesive, its preparation method and an application method. The adhesive contains a resin ingredient and a cured ingredient, wherein the resin ingredient contains a main resin, a flexibilizer and a filling material. The main resin contains a first epoxy resin and a second epoxy resin, wherein epoxy equivalent of the first epoxy resin is 150-300 and softening point of the second epoxy resin is 65-100 DEG C. The cured ingredient contains a normal-temperature curing agent. After the adhesive is coated on the surface of steel plates, the bonding strength between the steel plates is very high without the need of spot welding or riveting.

The invention discloses a high-initial-adhesion-strength moisture-curable polyurethane hot melt adhesive and a preparation method thereof. The adhesive is prepared from the following raw materials inparts by weight: 20-50 parts of polyether polyol, 10-40 parts of crystalline polyester polyol, 5-30 parts of liquid polyester polyol, 10-20 parts of polyisocyanate, 10-35 parts of thermoplastic acrylic resin, 2-15 parts of tackifying resin, 0.1-0.5 parts of a catalyst and 0.1-1 part of an antioxidant. The moisture-curable polyurethane hot melt adhesive provided by the invention has the advantagesof long opening time, high initial adhesion strength, high curing speed, higher final adhesion strength, favorable damp-heat resistance and favorable high/low-temperature impact resistance, and can achieve the goals of no pressure maintaining and high-efficiency production of electronic products.

The present invention discloses a prescription of an adhesive used for an aircraft tire retreading. The adhesive considers caoutchouc as the main material and also contains the main auxiliary materials of styrene butadiene rubber, adhesion promoter, adhesive, high abrasion furnace black, high dispersion white carbon black, ketoamine age inhibitor, indiscerptible sulfur and sulfenamide accelerant. The main material and the main auxiliary materials are made into gross rubber according to certain weight portion ratio, and the gross rubber is mixed with gasoline by certain proportion to be made into the adhesive. The adhesive of the prescription has the advantage that the adhesive solves the problem of sticking an old tire body with a retreading component when the aircraft tire is retreaded, which ensures that the aircraft tire does not have the problem of the delamination of the glue material between the old tire body and the retreading component, bulging and other quality problems during the use course, and the tire is safe for using.

The invention provides a method for preparing water-borne polyurethane emulsion with high solid content by the continuous method. The method comprises the following steps that: oligomer polylol after vacuum dehydration, isocyanate, a chain extender, a solvent and a catalyst are added into a reactor at a time under the protection of dry nitrogen; the mixture is mechanically stirred and simultaneously controlled at a certain temperature for reaction to a certain degree; the system temperature is reduced to between 20 and 50 DEG C; the hydrophilic chain extender is slowly dripped into a prepolymer which is then added with the solvent so as to prevent gel coagulation caused by overlarge viscosity; the isocyanate-based NCO content in the prepolymer which is generated through reaction is not changed again; and the prepolymer is added with water again to perform emulsion dispersion and undergoes vacuum distillation to remove the solvent, and then the water-borne polyurethane solution is prepared. The water-borne polyurethane solution prepared by the method has high solid content, low viscosity, large initial bonding strength, and good heat resistance, can be used as textile fabric coating agent, shoe coating agent, leather finishing agent, and adhesives used in the fields of wood, architecture, automobile, paper-making, electronics and so on.

The invention discloses a primer coating for a polyurethane sealant, in particular relates to a primer coating with high initial adhesive strength for the polyurethane sealant and a preparation method thereof and belongs to the technical field of adhesives. The primer coating is prepared from the following raw materials: 50-70 parts of hard resin containing isocyanate groups, 5-15 parts of silane compound, 10-20 parts of polyisocyanate and 5-10 parts of non-reactive thermoplastic resin. The polyurethane primer coating prepared by the method has high initial adhesive strength for different base materials and is high in curing speed and firm in adhesion, the polyurethane adhesive/sealant can be coated without waiting, and the production efficiency of the automobile glass assembly line can be improved.

The invention discloses PVC/PE/PVCD solid medicine using composite hard sheet manufacturing technology. It includes the following steps: unreeling for PVC basis material; corona treatment for its surface; coating adhesive; drying; unreeling for PE film; compositing the PVE basis material and PE film; solidifying; dying; corona treatment for the PE film surface; coating adhesive; coating PVCD glue; drying to form PVCD film; repeating coating the PVCD glue on the PE film; drying; rolling, solidifying to form PVCD film again; patting cut and detecting.

The invention provides a hot-melt polyurethane adhesive with high initial adhesion. The hot-melt polyurethane adhesive comprises, by weight, 70 to 90% of polyurethane prepolymer and 10 to 30% of an adhesion promoting agent, wherein the adhesion promoting agent is prepared through addition of rosin acid, one-component or two-component epoxy, and hydrogenated rosin or any cyclic compound with a carboxyl group or natural resin. The invention has the following unique beneficial effects: 1, the active adhesion promoting agent is produced through addition of natural resin or a related cyclic compound with the carboxyl group and epoxy for the first time, and is applied to the reactive polyurethane adhesive; and 2, the novel two-step preparation method has not been reported and used so far. The novel two-step preparation method can prepare a hot-melt polyurethane adhesive product with high initial adhesion without changing a formula for the hot-melt polyurethane adhesive. The hot-melt polyurethane adhesive product has creep resistance reaching the grade of 3, 500 g, and has superior heat stability. Due to high adhesive capability and arbitrarily-adjustable hot opening time of the product, the hot-melt polyurethane adhesive product can be applied to industrial places like the shoemaking industry and engineered floors with high requirements on initial adhesion.

The invention discloses a single-component silane modified polyether sealant used in automobile glass rapid assembling. The single-component silane modified polyether sealant used in automobile glassrapid assembling comprises, by weight, silane modified polyether resin of 30 to 60 parts; an environmentally friendly plasticizer of 8 to 30 parts; a filler of 10 to 15 parts; a reinforcing material of 10 to 30 parts; a thixotropic agent of 0.1 to 1; a UV absorber of 0.1 to 1 part; a light stabilizer of 0.1 to 1 part; an antioxidant of 0.2 to 2 parts; a water removal agent of 0.2 to 2 parts; a crosslinking agent of 1 to 10 parts; a coupling agent of 0.1 to 5 parts; and a catalyst of 0.1 to 2 parts. The invention also discloses a preparation method thereof. The sufficient bonding strength of the single-component silane modified polyether sealant is ensured, at the same time, the initial bonding strength of the single-component silane modified polyether sealant is ensured, high bonding speedis achieved, the single-component silane modified polyether sealant is safe, and is friendly to the environment, the bonding effect is excellent, and the single-component silane modified polyether sealant is suitable to be used for rapid assembling of windshield, skylight, and side window glass of vehicles such as passenger cars, delivery vehicles, fire fighting trucks.

The invention provides modified inorganic nano particles, composite waterborne polyurethane resin, and a preparation method and application thereof. The preparation method of the modified inorganic nano particles comprises the following steps of: (1) preparing a fluorine-containing polyaminosilane coupling agent by using fluorine-containing acrylic acid and a polyaminosilane coupling agent; (2) preparing fluorine-containing polyamino silane coupling agent hydrolysate; (3) preparing dispersion liquid of the inorganic nano particles; (4) preparing the modified inorganic nano particles by using the dispersion liquid of the inorganic nano particles and the fluorine-containing polyamino silane coupling agent hydrolysate. The modified inorganic nano particle composite waterborne polyurethane resin is prepared by the reaction of the following substances: modified inorganic nano particles, diisocyanate, polymer polyhydric alcohol, a nonionic hydrophilic compound, a sulfonic acid type hydrophilic chain extender and an organic amine chain extender. The modified inorganic nano particles and the composite waterborne polyurethane resin thereof have good performance, simple preparation method and wide application.

The invention provides special glue for cigarettes. The special glue for cigarettes comprises vinyl acetate, polyvinyl alcohol, dibutyl phthalate, a crosslinking agent Me-10, a copolymerization catalyst Zh-4 and water. The special glue for cigarettes provided by the invention has the characteristics of water tolerance, heat resistance, freezing resistance, high initial adhesive strength and the like. The special glue for cigarettes is applicable to the conventional different models of cigarette machines in China to serve as cigarette glue and can also serve as high-performance general milk-white glue.

The invention discloses an aviation tire reinforcing layer adhesive of high adhesive strength, prepared through two-stage mixing performed by a mixer by using main materials: 80-90% of ribbed smoked sheet 1#, 10-20% of styrene butadiene rubber 1500, 30-40% of new process high structural and high wear resistant carbon black, 5-10% of silica, and silane coupling agent KH-560, adhesion promoter AIR-201, adhesive SL-3090, p-phenylenediamine antioxidant 4010NA, antioxidant RD, sulfenamide accelerator and scorch retarder CTP, . The invention has properties of high initial adhesive strength, high adhesive after aging, high tensile strength, high tensile modulus and low heat production, and can meet property requirements of high speed and high load of future new model tires; and the adhesive strength between rubber before and after aging and nylon cord is high, has high hardness and tensile, low heat production, and can improve the dynamic property of tires, thereby preventing tires from delaminating, blowing up and rejecting of tread, and improving the safety performance of aviation tires.

The invention discloses a thermal-resistant PVC (Polyvinyl Chloride) composite double-component polyurethane adhesive which comprises a polyurethane prepolymer as a main agent and comprises raw materials, namely, oligomer polyhydric alcohols, hydroxyl chloride vinyl acetate resin, a chain extender, polyisocyanates, a catalyst A and a solvent in a mass ratio of 100:(5-20):(0-20):(10-30):(0-0.05):(300-800), wherein the viscosity of the adhesive is 1000-20000cps/25 DEG C, the solid content of the adhesive is 20-50%, a curing agent is a polyurethane prepolymer of a mono-isocyanate group which is synthesized from polyisocyanates and a polyhydroxy compound by using a prepolymerization method, the content of the polyisocyanates is 10-15wt%, and the solid content is 70-80%. Due to addition of the hydroxyl chloride vinyl acetate resin which has very good affinity with a PVC substrate, a prepared primary product is very high in adhesion strength, good in plasticizer resistance effect, very good in peeling strength, very high in tearing load and very good in thermal resistance.

An adhesive hydrogel contains: a polymer matrix of a copolymer of a monofunctional monomer and a crosslinking monomer (a); another polymer component; water; and a polyhydric alcohol, wherein: either a structural unit derived from the monofunctional monomer contained in the polymer matrix or the other polymer component or both contain a structural unit derived from at least one compound (b) selected from the group consisting of ethylenically unsaturated carboxylic acids, ethylenically unsaturated carboxylic acid salts, and ethylenically unsaturated carboxylic acid derivatives having a hydroxyl group, an acid group, a salt thereof, an amino group, and/or an ammonium group; and the other polymer component contains a polymer compound (c) with a side chain having an oxyalkylene group or a polyoxyalkylene group.

The invention disclose a preparation method and application of moisture reaction type polyurethane hot-melt adhesive for a composite floor and belongs to the technical field of macromolecule material preparation .According to the method, polyester polyol, diisocyanate and chain extender are adopted as basic raw materials, auxiliary agents such as accelerant, a flatting agent and a nucleating agent are combined, and a high temperature polymerization reaction is conducted, so that the moisture reaction type polyurethane hot-melt adhesive (PUR) is obtained .A product prepared through the method is the one-component moisture reaction type polyurethane hot-melt adhesive, no cross-linking agent is used for hardening, and instead, an NCO functional group with the resin molecular chain tail end reactive is adopted for reacting with moisture to achieve cross-linking .The solid content of the product is 100%, no solvent is contained, no solvent is used in the technological process, a baking channel does not need to be arranged, cost is lowered, and no safety or environmental protection problem exists .In addition, the polyurethane adhesive product produced through the method is high in cohesive energy, good in initial adhesion and excellent in heat resistance, weather resistance, hydrolysis resistance and aging resistance after being cured and can be widely applied to processing of building decorative materials.

The object of the present invention is to provide a moisture-curable hot melt adhesive having high initial adhesive strength, long open time, excellent coating property and reduced stringing property. The present invention relates to a moisture-curable hot melt adhesive comprising (A) a urethane prepolymer having a terminal isocyanate group, (B) a metallocene-based polyolefin having a viscosity of 10,000 mPa·s or less at a temperature of 170° C. and (C) a polyester-polyether copolymer.

The invention relates to tertiary-amine-group-containing polyacrylic acid resin modified reaction-type polyurethane hot melt glue and preparation thereof. The hot melt glue is prepared from the following raw material components in parts by weight: 10-40 parts of polyester polyol, 10-40 parts of polyether polyol, 10-30 parts of polyisocyanates, 1-40 parts of tertiary-amine-group-containing polyacrylic acid resin, 0.01-1 part of a catalyst and 0.05-5 parts of a silane coupling agent. Compared with the prior art, the bonding strength of various base materials is greatly improved, especially the initial bonding strength and the final bonding strength of metal and non-polar plastic base materials are greatly improved; and meanwhile, the viscosity and the opening time are moderate, a process iseasy to use and operate, and the using requirements of different industrial application fields can be met.

The invention discloses a dual-curing polyurethane hot melt adhesive and preparation and using methods thereof. The dual-curing polyurethane hot melt adhesive is prepared from a main material and an auxiliary material, wherein the main material is prepared from the flowing raw material components: polyester polyol, polyether polyol, a chemical modifier, isocyanate and a chain extender, and the auxiliary material is prepared from the flowing raw material components: a physical modifier, a catalyst, a silane coupling agent, a photoinitiator, an antioxygen and white carbon black. According to thetechnical scheme, the UV light/wet dual-curing polyurethane hot melt adhesive has the advantages of a wet curing polyurethane hot melt adhesive and an ultraviolet curing hot melt adhesive and meanwhile overcomes the disadvantages of the wet curing polyurethane hot melt adhesive and the ultraviolet curing hot melt adhesive; and the UV light/wet dual-curing polyurethane hot melt adhesive is synthesized through the chemical modifier and adopts an acrylate diluent as aiding to be blended to improve compatibility of the components, and a polyurethane hot melt adhesive product which is high in initial bonding strength, good in tenacity, high in weather resistance and convenient to construct is obtained.