263results about How to "Increase crosslink density" patented technology

The invention discloses a low-loss resin composition, which is prepared from the following main components in parts by weight: 10 to 90 parts of acenaphthylene-p-vinylbiphenyl copolymer, 10 to 70 parts of cross-linking agent, 20 to 60 parts of elastomer, 0.1 to 3 parts of initiator and 10 to 90 parts of filler. The acenaphthylene-p-vinylbiphenyl copolymer is obtained by pre-polymerizing acenaphthylene and divinylbiphenyl, the acenaphthylene monomer residue is less, the acenaphthylene monomer is difficult to volatilize in a resin system, implosion caused by too fast curing reaction of the resin system is prevented while good reaction activity is maintained, and a subsequent curing product is high in crosslinking density and good in heat resistance; a machining window is wide, and subsequent production and machining are facilitated; and an acenaphthylene structure has high symmetry and rigidity and does not contain elements such as oxygen, sulfur and nitrogen, so that the resin composition has excellent dielectric properties and thermal properties and a low thermal expansion coefficient, and an elastomer as a cross-linking curing matrix material can provide the characteristics of low dielectric constant, low dielectric loss, low water absorption and the like.

The invention discloses a waterborne epoxy resin coating, a preparation method and application in bridge protection, and belongs to the technical field of coatings. The water-borne epoxy resin coating comprises the following raw material components in parts by weight: 15-25 parts of epoxy composite resin emulsion, 100 parts of emulsified asphalt, 3-5 parts of a curing agent and 6-10 parts of water, wherein the epoxy composite resin emulsion is obtained by carrying out a composite reaction on 30-60 parts by mass of epoxy resin, 2-3 parts by mass of an emulsifier, 6-9 parts by mass of an acrylate composition and 1.4-1.6 parts by mass of a co-stabilizer; the acrylate composition is prepared by prepolymerizing 15 to 16 parts by mass of butyl methacrylate, 10 to 12 parts by mass of 2-isopropenyl aniline, 5 to 7 parts by mass of allyl glycidyl ether and 1 to 1.2 parts by mass of allyl polyhedral oligomeric silsesquioxane and then combining the prepolymerized materials with 1 to 3 parts by mass of acrylic acid.

The invention relates to the technical field of adhesives, and discloses an antibacterial mildew-proof water-based adhesive and a preparation method thereof. The preparation method of the antibacterial and mildew-proof water-based adhesive comprises the following steps: reacting 2, 2-dimethylolpropionic acid with castor oil to obtain hyperbranched bio-based polyol; modifying the hyperbranched bio-based polyol by using a modifier to obtain modified bio-based polyol; the preparation method comprises the following steps: preparing a waterborne polyurethane dispersion liquid by taking modified bio-based polyol, a hybrid modified BN / MOF composite material and hexamethylene diisocyanate as raw materials and 1, 4-butanediol as a chain extender; the preparation method comprises the following steps: mixing a waterborne polyurethane dispersion liquid, a wetting agent, a defoaming agent, a thickening agent and water to obtain a component A; an aliphatic curing agent is used as a component B; during use, the component A and the component B are mixed and stirred. The antibacterial and mildewproof water-based adhesive disclosed by the invention has excellent adhesion performance, water resistance, self-repairing performance and lasting antibacterial and mildewproof performance.

The invention belongs to the field of electrode paste preparation, and provides low-temperature curing silver-coated copper paste for a heterojunction solar cell and a preparation method of the low-temperature curing silver-coated copper paste. Ethyl cellulose is adopted as a matrix material, a stable matrix network is provided for slurry through good cohesiveness and dispersity of ethyl cellulose, and a network structure with a high crosslinking degree is formed by adding modified phenolic resin, organic silicon modified epoxy acrylate and other chemical modification materials into the slurry. The mechanical strength and adhesive force of the slurry are further enhanced, surface modification is carried out on inorganic filler such as silver-coated copper powder and bismuth oxide through a silane coupling agent and a titanate coupling agent, and the interface bonding force between the filler and an organic matrix is enhanced through silicon-oxygen bonds formed on the surface of the filler; by adding the carboxylated polyamide wax and the organic bentonite, the agglomeration tendency of the filler is reduced by utilizing the adsorption and electrostatic repulsion effects of the carboxylated polyamide wax and the organic bentonite on filler particles, and the obtained conductive slurry has the characteristics of excellent conductivity and low-temperature rapid curing.

The invention relates to an anti-yellowing automobile composite film and a preparation method thereof, and belongs to the technical field of high polymer materials. The yellow-resistant automobile composite film is prepared from the following components in parts by weight: 60 to 70 parts of PVC (Polyvinyl Chloride) master batch, 10 to 20 parts of TPU (Thermoplastic Polyurethane) master batch, 1 to 2 parts of plasticizer, 0.5 to 0.8 part of flatting agent, 0.1 to 2 parts of yellowing-resistant modifier and 0.1 to 2 parts of modified flame retardant, sym-triazine cyanuric chloride and a benzotriazole intermediate in the anti-yellowing modifier absorb ultraviolet rays and reduce yellowing of the ultraviolet rays on the composite material, and maleimide groups, maleic anhydride and isocyanurate rings for increasing the crosslinking density cooperate with one another, so that the heat resistance of the material is improved, and the yellowing is reduced; phosphorus and nitrogen main chains of phosphonitrilic chloride trimer in the modified flame retardant have a conjugation effect, so that a protective film is formed, oxygen is isolated, and the phosphonitrilic chloride trimer and nitrogen are synergistically flame-retardant; the anti-yellowing automobile composite film prepared by the invention not only has excellent ultraviolet absorption performance, heat resistance and anti-yellowing effects, but also has a good flame retardant effect.

The invention provides impact-resistant high-toughness plastic as well as a preparation method and application thereof, and relates to the technical field of high polymer materials. Comprising the following raw materials in parts by weight: 35-45 parts of hydroxyl-terminated hyperbranched polycarbonate, 15-25 parts of LDPE (Low-Density Polyethylene) resin, 8-12 parts of inorganic filler, 4-6 parts of isocyano ethyl methacrylate, 1-3 parts of bis (1-vinyl imidazole-2-) ketone, 1-3 parts of bis (trimethylsilylated) vinyl phosphate, 1-3 parts of 1, 3, 5-triglycidyl-S-triazinetrione, 1-3 parts of 3, 3 '-diamino-4, 4'-diphenyl-1, 3, 4-triazole-2-ketone, 1-3 parts of 1, 3, 5-triazole-2-ketone, 1-3 parts of 1, 3 '-trimethylsilylated vinyl phosphate, 1-3 parts of 2, 3'-diphenyl-1, 3, 4, 5- The material is prepared from the following components in parts by weight: 1-3 parts of 4, 4 '-difluorodiphenyl sulfone, 2-4 parts of a coupling agent, 0.5-1.5 parts of an antioxidant, 0.8-1.2 parts of a compatilizer, 0.7-1 part of a catalyst and 0.8-1 part of an initiator. The plastic has the advantages of favorable mechanical properties, favorable heat aging resistance, favorable impact toughness, favorable flame retardancy and favorable environmental friendliness.

The invention discloses an antibacterial bamboo joint pull rope material for tampons and a preparation method of the antibacterial bamboo joint pull rope material. Modified bentonite is introduced into an acrylic acid-acrylamide polymer, and a layered structure of the bentonite endows the antibacterial bamboo joint pull rope material with certain water absorption and water retention capacities; meanwhile, amino groups on the modified bentonite are chemically combined with carboxyl groups in the acrylic acid-acrylamide polymer, so that the modified bentonite is not easy to lose; according to the preparation method, firstly, water-absorbing fibers are soaked in a carboxymethyl chitosan solution, the surfaces of the water-absorbing fibers are coated with carboxymethyl chitosan, the carboxymethyl chitosan has excellent water-retaining and antibacterial properties, an antibacterial water-retaining layer is formed on the surfaces of the water-absorbing fibers, and then under the action of a cross-linking agent ethylene glycol diglycidyl ether, the antibacterial water-retaining layer is formed on the surfaces of the water-absorbing fibers. Hydroxyl groups and amino groups in the carboxymethyl chitosan and carboxyl groups and amino groups on the water-absorbing fibers are subjected to a cross-linking effect, so that the bonding strength and the cross-linking density between the carboxymethyl chitosan and the water-absorbing fibers are improved, liquid seepage is effectively prevented, and the water retention performance of the fiber material is further improved.

The invention provides a thermosetting resin composition, a resin adhesive film and application thereof. The thermosetting resin composition comprises the following components in parts by mass: 5-95 parts of benzocyclobutene resin, 5-95 parts of a component containing C = C unsaturated bonds, 5-300 parts of a modified filler and 0.1-10 parts of an initiator, the modified filler is an inorganic filler subjected to surface treatment by a coupling agent containing unsaturated groups, and the unsaturated groups are selected from any one or a combination of at least two of styryl, acryloyloxy, methacryloyloxy and polybutadiene groups. A resin adhesive film prepared from the thermosetting resin composition is excellent in dielectric property, low in dielectric loss tangent Df, good in dielectric stability, small in Df (10GHz) variation amplitude after HAST, high in chemical copper binding force and capable of fully meeting the performance requirement for preparing a high-frequency and high-speed printed circuit board through a semi-addition method or an addition method.

The invention provides an epoxy resin composition, a prepreg, a laminated board and a metal foil-clad laminated board. The epoxy resin composition comprises the following components in parts by weight: A, 100 parts of epoxy resin; b, 120-390 parts of a curing agent; c, 50 to 200 parts of inorganic filler; the curing agent comprises B1 amino modified organosilicon polymer and B2 amine curing agent and / or phenolic curing agent, and the ratio of B1 to B2 is (1: 2)-(1: 7). The amino modified organic silicon and the amine and / or phenolic aldehyde curing agent are compounded to co-cure the epoxy resin, the overall crosslinking density is increased, and meanwhile, compounding of epoxy resin with different molecular weights is combined, so that the effect of increasing the heat resistance and toughness of a system is achieved. Meanwhile, an amino modified organosilicon polymer is introduced into an epoxy resin system, so that the soft degree of a curing molecular chain can be adjusted, the release of stress in the resin curing process is accelerated, and the effect of flatness of the surface of the prepreg and the plate is achieved.

The invention provides an emulsion slow crosslinking type plugging control gel, which is in an oil-in-water type, and is prepared from the following raw materials in percentage by weight: 25 to 40 weight percent of nonionic monomer, 0.5 to 2 weight percent of dihydroxy anthraquinone, 5 to 16 weight percent of anionic monomer, 0.002 to 0.2 weight percent of initiator and the balance of water. The emulsion comprises the following components in percentage by weight: 10 to 35 percent of deionized water, 15 to 30 percent of non-polar solvent, 2 to 8 percent of emulsifier, 1 to 4 percent of emulsifying aid and 0.5 to 1.5 percent of phase inversion agent. According to the plugging adjusting gel, the modified functional monomer dihydroxy anthraquinone is added, and the dihydroxy anthraquinone and monomers such as acrylamide are copolymerized to form oil-in-water type polymer gel, so that the initial viscosity is low, the strength and the plugging rate are high, and the gelling time is controllable.

The invention relates to the technical field of epoxy splicing adhesives, in particular to a high-performance prefabricated part epoxy splicing adhesive and a preparation method thereof.The epoxy splicing adhesive comprises a component A and a component B. The component A is prepared from 3%-8% of polyether polyol, 2%-4% of hydrophobic fumed silica, 0.1%-1% of a silane coupling agent, 0.01%-0.5% of a defoaming agent, 50%-75% of modified quartz sand, 1%-5% of color paste and the balance epoxy resin; the modified quartz sand is prepared by grafting an amino silane coupling agent on the surface of quartz sand, then reacting with polychlorophosphazene, and then reacting with glycidol; the component B comprises the following components in percentage by weight: 0.2-4% of color paste, 1-5% of hydrophobic fumed silica, 0.1-1% of an amino silane coupling agent, 10-25% of 0.5 mm quartz sand, 40-60% of 0.1 mm quartz sand and the balance of a modified amine curing agent; the preparation method has the advantage that the mechanical strength and the bonding strength of the epoxy splicing adhesive are improved.

The invention belongs to the technical field of waterproof materials, and particularly relates to a silane modified polyether waterproof coating and a preparation method for improving hydrophobicity of the silane modified polyether waterproof coating. The silane modified polyether waterproof coating is prepared from the following raw materials in parts by weight: 25 to 40 parts of polyether polyol, 40 to 50 parts of solid filler, 15 to 20 parts of plasticizer, 0.5 to 1.5 parts of silane end-capping reagent, 0.5 to 2 parts of silane coupling agent, 1 to 2 parts of water removal agent, 0.3 to 1 part of dispersing agent, 0.3 to 1 part of light stabilizer, 0.3 to 1 part of ultraviolet absorbent and 0.1 to 1 part of catalyst. The polyether polyol is obtained by random copolymerization of epoxypropane and epoxybutane, and the molecular weight of the polyether polyol is 8000-20000 g / mol. The silane modified polyether waterproof coating provided by the invention has good hydrophobicity and good mechanical strength, and meets the requirements on high-performance and environment-friendly waterproof coatings. The invention also provides a preparation method for improving the hydrophobicity of the polyether waterproof coating.

The invention relates to the technical field of adhesive tapes, and discloses an electrolyte-resistant double-sided adhesive tape for an environment-friendly new energy lithium battery, the double-sided adhesive tape comprises a base film layer, adhesive film layers and release films, the adhesive film layers are distributed on two sides of the base film layer, the release films are distributed on two sides of the adhesive film layers, and the adhesive film layers are formed by coating electrolyte-resistant adhesives on two sides of the base film layer. The electrolyte-resistant adhesive is prepared by carrying out cross-linking polymerization on acrylic monomers such as methyl methacrylate and hydroxyethyl methylacrylate under the action of an initiator and a cross-linking agent, and the cross-linking agent is a macromolecular substance which is connected through a silicon-oxygen bond and has a cyclohexyl hexafluoropropane-tertiary butyl block alternating structure. After the special structure of the cross-linking agent is introduced into the molecular chain of the adhesive, the adhesive property, high temperature resistance and electrolyte resistance of the adhesive can be obviously enhanced.

The invention relates to the technical field of epoxy resin, in particular to an epoxy resin composition for high-strength carbon fiber winding and a preparation method thereof.The preparation method of the epoxy resin composition comprises the steps that S1, modified epoxy resin, a compatilizer, a retarder, a defoaming agent and nano filler are added into a reaction kettle and mixed and stirred, and a mixture A is obtained; s2, a composite curing agent is added into the mixture A, stirring and mixing are conducted, and the epoxy resin composition is obtained and has the advantages of being appropriate in viscosity, good in heat resistance, excellent in impact resistance, large in bending strength, small in volume shrinkage rate in the curing process, moderate in gelation time and capable of being wound with carbon fibers conveniently to prepare the composite material.

The invention discloses a bio-based waterborne polyurethane coating and a preparation method thereof, and belongs to the technical field of coatings. The bio-based waterborne polyurethane coating prepared by the invention is prepared from the following raw material components in parts by weight: 70 to 80 parts by mass of bio-based polyurethane dispersion liquid, 40 to 60 parts by mass of polysiloxane dispersion liquid, 2 to 5 parts by mass of a cosolvent, 0.1 to 0.5 part by mass of a defoaming agent, 0.5 to 1 part by mass of a photoinitiator and 0.1 to 3 parts by mass of an antioxidant, wherein the bio-based polyurethane dispersion liquid is obtained by dispersing bio-based polyurethane in deionized water, and the bio-based polyurethane is obtained by reacting a polyisocyanate monomer, a catalyst, castor oil and a chain extender; the polysiloxane dispersion liquid is obtained by performing polycondensation on siloxane monomers and then dispersing the siloxane monomers in deionized water.

The invention relates to the field of polyurethane resin, and particularly discloses 3D printing light-cured polyurethane resin as well as a preparation method and application thereof. The 3D printing light-cured polyurethane resin is prepared from the following raw materials in parts by weight: 60-80 parts of a polyurethane acrylate prepolymer, 15-25 parts of a diluting monomer, 8-12 parts of a dispersing filler, 6-8 parts of a photoinitiator and 3-5 parts of a stabilizer, the polyurethane acrylate prepolymer is prepared from aliphatic diisocyanate, trimethylolpropane diallyl ether, dipentaerythritol hexaacrylate, o-phenyl phenoxyethyl acrylate and a catalyst, and the polyurethane acrylate prepolymer is prepared from the aliphatic diisocyanate, the trimethylolpropane diallyl ether, the dipentaerythritol hexaacrylate, the o-phenyl phenoxyethyl acrylate and the catalyst; the polyurethane resin prepared by the invention has relatively good flexibility and elasticity, low shrinkage rate and low possibility of deformation, and can be applied to products with complex structures and high dimensional requirements, such as soles and underwear mold cups prepared by 3D printing.

The invention relates to the technical field of organic silicon resin preparation, in particular to trapezoidal methyl silicon resin and a preparation method thereof.The trapezoidal methyl silicon resin is prepared by taking methyl trichlorosilane as a main raw material, introducing a trapezoidal control agent containing amido and alkoxy at the same time to inhibit the reaction activity of the methyl trichlorosilane and then carrying out hydrolysis reaction in a small amount of alcohol solvent and water; the generation of a cross-linked network structure insoluble substance during hydrolysis is avoided, and the resin gelation risk is effectively reduced. The hydrolysis rate is reduced, so that the use amount of the solvent is reduced, the proportion of alcohol in the water phase is greatly reduced, and the process and environmental protection cost is reduced. The trapezoidal methyl silicone resin prepared by the method is excellent in viscosity performance, high in yield, excellent in boiling resistance, short in curing time, high in resin softening point and short in gelation time.

The invention relates to the technical field of epoxy resin, and discloses a polyarylamide modified boron nitride-epoxy resin composite material, hydroxylated nano boron nitride reacts with a diazo group of 4-diazo diphenylamine sulfate to obtain aminated nano boron nitride, the aminated nano boron nitride and a 3, 5-diaminobenzoic acid monomer are subjected to a polymerization reaction to obtain polyarylamide modified boron nitride, and the polyarylamide modified boron nitride-epoxy resin composite material is prepared through the following steps: reacting hydroxylated nano boron nitride with a diazo group of 4-diazo diphenylamine sulfate; the polyarylamide modified boron nitride has good compatibility with epoxy resin, amino-terminated groups can be subjected to ring-opening reaction with epoxy groups of the epoxy resin, nano boron nitride is organically combined with the epoxy resin under the bridging action of polyarylamide, covalent bonds formed between a large number of amino groups on the surface and the epoxy resin in the curing process, and the epoxy resin can be cured to form the epoxy resin. The interface thermal resistance of the filler and the epoxy resin is reduced, the superhigh resistivity of the nano boron nitride, the reduction of agglomeration and the modification of the filler enable the polyarylamide modified boron nitride-epoxy resin composite material to show excellent thermal conductivity.

The invention relates to a hydrated borate micromolecule with a boron-nitrogen coordination bond, a derivative resin material and a preparation method of the hydrated borate micromolecule. The preparation method comprises the following steps: S1, synthesizing boron-nitrogen coordination micromolecules: dissolving and reacting boric acid, a derivative thereof and a polyfunctional group amine compound at room temperature through a solution reaction to obtain the boron-nitrogen coordination micromolecules; the borate micromolecule NCBW-X with intramolecular boron and nitrogen coordination is formed; s2, the NCBW-X micromolecule can be used for curing epoxy resin and synthesizing materials such as phenolic resin through end-NH2 and end-OH on two sides, the NCBW-X improves the mechanical property of each system through a rigid eight-membered ring, boron-nitrogen coordination of the NCBW-X can generate hydration, the environmental endurance is improved on the premise of retaining the original dynamic nature of boric acid ester of the NCBW-X, and the service life of the NCBW-X micromolecule is prolonged. Meanwhile, due to the dynamic reversibility of the NCBW-X, the NCBW-X is used for curing epoxy resin, and materials such as phenolic resin and the like are improved to a certain extent in the aspects of self-repairing and recycling.

The invention belongs to the technical field of underwater construction materials, and particularly relates to a self-leveling anti-dispersion underwater bottom sealing material and a preparation method thereof. The self-leveling anti-dispersion underwater bottom sealing material disclosed by the invention is prepared from the following components in parts by weight: 530 to 730 parts of sulphoaluminate cement, 77 to 277 parts of ordinary Portland cement, 84 to 126 parts of fly ash, 870 to 950 parts of fine aggregate, 250 to 278 parts of water, 18 to 23 parts of a water reducing agent, 6 to 10 parts of a flocculating agent, 8 to 12 parts of a retarder, 0.9 to 1.4 parts of a de-foaming agent and 0.1 to 0.4 part of an early strength agent. The self-leveling dispersion-resistant underwater bottom sealing material disclosed by the invention has good fluidity and dispersion resistance.

The invention discloses an epoxy modified room-temperature self-crosslinking water-based acrylate dispersion as well as a preparation method and application thereof, and belongs to the field of water-based acrylic resin. The dispersoid is obtained by extracting an organic solvent from an acrylate polymer, adjusting the pH value to 7.5-8.5, mixing with ionized water and binary hydrazide, dispersing and filtering. The acrylate polymer is obtained by carrying out solution polymerization on a mixed solution of a part of initiator, a hard monomer, a soft monomer, a first type of hydrophilic monomer, a second type of hydrophilic monomer, epoxy resin and a combined cross-linking monomer and a residual initiator dissolved in an organic solvent at 80-83 DEG C, wherein the mixed solution is prepared from the initiator, the hard monomer, the soft monomer, the first type of hydrophilic monomer, the second type of hydrophilic monomer, epoxy resin and the combined cross-linking monomer. The main solvent of the dispersion is water, the viscosity is low, and the content of the organic solvent is 1t; the water-based ink has the advantages of low content of VOCs (volatile organic compounds), multiple cross-linked network structure, high cross-linking degree (78-83%), excellent resolubility after being prepared into ink, good adhesive force on a plastic film, good water resistance, good storage stability and high glossiness.

The invention discloses a quick-drying waterborne epoxy coating and a preparation method thereof, and relates to the field of coatings. When the quick-drying waterborne epoxy coating is prepared, modified cyclotetrasiloxane, 3-aminopropyl methyl dimethoxy silane and quaternized silane are subjected to a reaction, and functional polysiloxane is prepared; the preparation method comprises the following steps: reacting graphene oxide with ethylenediamine and allyl phosphine dichloride to prepare modified graphene; the preparation method comprises the following steps: preparing a component A from modified graphene, functionalized polysiloxane, a defoaming agent, azodiisobutyronitrile and deionized water, taking waterborne epoxy emulsion as a component B, and uniformly mixing the component A and the component B to prepare the quick-drying waterborne epoxy coating. The quick-drying waterborne epoxy coating prepared by the invention has good corrosion resistance, self-repairing performance, flame retardance, antibacterial performance and wear resistance.

The invention provides a heat-conducting vegetable protein-based composition, a heat-conducting vegetable protein adhesive as well as a preparation method and application of the heat-conducting vegetable protein-based composition and the heat-conducting vegetable protein adhesive. The heat-conducting vegetable protein-based composition provided by the invention is prepared by ball-milling raw materials including a heat-conducting filler, modified vegetable protein and (3-(methacrylamido) propyl) trimethyl ammonium chloride in a mass ratio of 1: (0.3-5): (0.03-1) for 15-25 hours. The heat-conducting vegetable protein adhesive comprises the following raw materials in percentage by weight: 6-20% of the heat-conducting vegetable protein-based composition and 3-8% of a cross-linking agent, and further comprises 0.1-3% of a flame-retardant reinforcing agent on the basis of the heat-conducting vegetable protein-based composition and the cross-linking agent. The heat-conducting vegetable protein adhesive provided by the invention adopts the heat-conducting vegetable protein-based composition, has good cementing performance and water resistance, also has good heat conductivity, flame retardance and mildew resistance, is beneficial to preparation of multifunctional materials, and is beneficial to industrial application, especially in the field of artificial board industry.

The invention discloses an LED (light-emitting diode) packaging adhesive material and a preparation method thereof, and the LED packaging adhesive material comprises the following components in parts by weight: 100 parts of silicone oil, 1-3 parts of catalyst and 0.1-1 part of inhibitor, the silicone oil contains titanium-zirconium-containing vinyl silicone oil, hydrogen-containing silicone oil and vinyl silicone oil in a weight ratio of 1: (5-12): (2-10). According to the LED packaging adhesive material synthesized by selecting the titanium-zirconium-containing vinyl silicone oil, the hydrogen-containing silicone oil and the vinyl silicone oil with specific types and dosages, phenyl, titanium, zirconium and alkyl in the LED packaging adhesive material are high in uniform distribution degree, a formed three-dimensional network structure is compact and stable, the LED packaging adhesive material has relatively high crosslinking density, and the service life of the LED packaging adhesive material is prolonged. And the high hardness of the LED packaging adhesive material can be improved. In addition, the LED packaging adhesive material provided by the invention has high refractive index and high light transmittance.

The invention relates to the technical field of functional fiber preparation, and discloses a method for preparing super-strong aging-resistant strength-maintaining polyester yarn and modified polyester yarn. The method comprises the following steps: (1) soaking polyester yarns in a modification solution containing a monoamino silane coupling agent, and then taking out the polyester yarns for padding; and (2) soaking the polyester yarns treated in the step (1) in a diisocyanate compound solution. According to the method, the monoamino silane coupling agent and the diisocyanate compound are sequentially used for carrying out surface treatment on the polyester yarn, so that the light resistance and durability of the polyester yarn are improved, the tolerance of the polyester yarn to ultraviolet rays is enhanced, the problems of yellowing and breakage caused by long-term outdoor use are solved, the increasingly stringent industrial application requirements are met, and the application prospect is wide. Substantive technical innovation and economic benefits are brought to related industries. According to the method, the traditional method of coating a high-performance material on the surface of the yarn is abandoned, and the method has the advantages of washing resistance, friction resistance and no influence on subsequent coloring.

The invention discloses an environment-friendly efficient cosmetic hose and a preparation method thereof.The cosmetic hose is prepared from, by weight, 60-80 parts of low-density polyethylene, 9-15 parts of high-density polyethylene, 15-20 parts of metallocene polyethylene, 30-40 parts of a PCR regenerated material, 1-3 parts of an antioxidant, 5-10 parts of a plasticizer, 1-3 parts of a coupling agent and 2-5 parts of a graphene auxiliary. The cosmetic hose is prepared by reasonably proportioning the raw materials, mixing and melting the raw materials at high temperature, extruding the raw materials into a hose shape, and then cooling, shaping, cutting, polishing and packaging the hose. Compared with the prior art, the prepared environment-friendly efficient cosmetic hose has excellent environment-friendly performance and also has excellent barrier property, tensile strength, antibacterial property and ultraviolet aging resistance, long-term use stability of the cosmetic hose is facilitated, and good quality control is guaranteed in the storage process of packaged contents.

The invention discloses extrusion-head in-situ rapid high-crosslinking low-compression permanent deformation conductive silicone rubber and a preparation method thereof. The conductive silicone rubber is prepared from the following raw materials in parts by mass: 100 parts of high vinyl silicone rubber, 2-10 parts of high vinyl silicone oil, 10-30 parts of white carbon black, 150-250 parts of coupling agent modified conductive powder, 2-5 parts of a vulcanizing agent and 1-3 parts of an assistant vulcanizing agent. The plunger type extruder is adopted, the raw materials are extruded and then subjected to in-situ rapid vulcanization forming, the formed conductive silicone rubber is high in crosslinking density and low in compression set, the problem that rubber strips of special-shaped complex structures are prone to collapse and deformation is solved, and the extruded conductive rubber strips do not need to be fed into a vulcanization channel for secondary vulcanization. The conductive rubber strip prepared by the invention has excellent electrical property and electromagnetic shielding effectiveness, and is high in mechanical property, good in rebound resilience and good in processability.

The invention relates to a hydrated borate micromolecule with a boron-nitrogen coordination bond, a polyurethane elastomer material and a preparation method thereof, and the preparation method comprises the following steps: S1, dissolving and reacting 1, 4-benzene diboronic acid and a polyfunctional group amine compound at room temperature through a solution reaction to form a rigid eight-membered ring intramolecular boron-nitrogen coordination micromolecule NCBW-X; s2, polyester (polycaprolactone, polybutylene terephthalate, polylactic acid and the like) or polyether (polytetrahydrofuran, polypropylene ether polyol and the like) and diisocyanate (isophorone diisocyanate, toluene diisocynate and the like) react in a dry solvent at 80 DEG C by using a catalyst to form a prepolymer; hydrazide and NCBW-X are added into the obtained prepolymer for chain extension; the water resistance and the acid and alkali resistance of the material are enhanced through the boron-nitrogen coordination structure characteristic; and the prepared polyurethane elastomer material has very strong self-repairing efficiency and environmental adaptability.

The invention discloses a lightweight high-strength bio-based chitosan hybrid aerogel and a preparation method thereof, and aims to solve the problems of brittleness and frangibility, powder falling, slag falling, toxic raw materials, complex preparation process, high cost and the like of the existing aerogel material. The lightweight high-strength bio-based chitosan hybrid aerogel is prepared by the following steps: uniformly stirring chitosan, polyvinyl alcohol, nano cellulose and metal oxide or non-metal oxide serving as raw materials to obtain a mixed solution, adding a cross-linking agent into the mixed solution, and obtaining bio-based chitosan gel through a sol-gel method; and carrying out program staged heating aging, solvent replacement and supercritical fluid drying to prepare the composite material. The aerogel has a nano-porous three-dimensional network framework and is low in density, high in strength and low in heat conductivity, raw materials used in the preparation method are easy to obtain and environmentally friendly, the requirement for equipment is low, the technical route is simple, operability is high, and the aerogel is suitable for industrial production to be put into the market and convenient for large-scale application in the field of construction and building materials.

The invention relates to the technical field of silica gel materials, and discloses a high-transparency silica gel material for glasses legs and a preparation method of the high-transparency silica gel material. The silica gel material comprises the following raw materials in parts by weight: 100 parts of vinyl silica gel, 15-25 parts of vinyl silicone oil, 3-6 parts of modified silicone oil, 15-25 parts of reinforcing filler, 1-3 parts of an antioxidant and 2-5 parts of a cross-linking agent, the silica gel material is prepared by taking vinyl silica gel as a matrix, adding reinforcing filler, modified silicone oil and other auxiliaries and mixing and vulcanizing, and the silica gel material has high transparency and excellent hydrophobicity and mechanical properties, so that the silica gel material has a good application prospect when being applied to glasses legs.