37results about How to "Increased curing crosslink density" patented technology

The invention discloses a silicon and fluorine-containing epoxy (meth) acrylate UV-curing composite coating, comprising the following ingredients of: epoxy (meth) acrylate, polyhedral iligomeric silsesquioxane, fluorine-containing (meth) acrylate, an active diluent monomer, a photoinitiator and an auxiliary agent. Such a composite coating, with excellent fouling resistance, corrosion resistance, weather resistance, abrasive resistance, water resistance, fouling resistance and dynamic performance, is an environmentally friendly coating which is suitable for building material, optical fiber wrapping and the coating of the surface of metal element.

The invention discloses a preparation method for amination polyphenyl ether, which is characterized by including the following steps that low-molecular-weight polyphenyl ether with double hydroxyl is generated through oxidation, coupling and copolymerization of two kinds of phenol, and low-molecular-weight polyphenyl ether resin with double amino is obtained through a process such as nitration. Compared with conventional polyphenyl ether resin, the polyphenyl ether resin with the double amino is more in active groups cross-linked with epoxy, larger in cross-linking degree with epoxy resin, can remarkably improve poly-p-phenylene oxide/ epoxy (PPO/EP) compatibility, can increase proportion of the polyphenyl ether resin in a PPO/EP system, and accordingly remarkably improves condensate electrical property of a resin system.

The invention discloses a plasticizer-precipitation-preventing UV viscosity-reducing adhesive tape. The adhesive tape comprises a release film, a plasticizer-precipitation-preventing UV viscosity-reducing adhesive layer and a base film which are sequentially arranged. The plasticizer-precipitation-preventing UV viscosity-reducing adhesive layer comprises acrylate pressure-sensitive adhesive resin,a cross-linking agent, a photoinitiator, an antistatic agent, a surface tension reducing aid and a solvent. The acrylate pressure-sensitive adhesive resin comprises a polyfunctional oligomer or a polyfunctional monomer or a composition thereof and a polyacrylate pressure-sensitive adhesive. The surface tension reducing aid comprises polyether modified polydimethylsiloxane of an acrylate functional group. The curing cross-linking density of the glue is increased, the surface tension of the coating is reduced, the precipitation of the plasticizer can be effectively controlled, and the plasticizer is prevented from permeating into the glue layer.

The invention relates to a resin composition and application thereof. In particular, the invention relates to the resin composition. The resin composition comprises 20 to 35 parts by weight of multifunctional epoxy resin, 8 to 15 parts by weight of isocyanate modified epoxy resin, 5 to 10 parts by weight of bifunctional epoxy resin, 40 to 65 parts by weight of polyphenyl ether resin and 8 to 16 parts by weight of cyanate ester resin. The invention also relates to a product of the resin composition. The product of the resin composition comprises a resin film, a bonding sheet, a prepreg, a composite material, a laminated board and a printed circuit board. Through combination of different resin, superposition of product performance is realized, so that the product has good appearance and also has the comprehensive effects of heat resistance, low dielectric loss and easiness in processing.

The invention discloses acid resistance type protective ink and a preparation method thereof. Phenolic epoxy acrylic resin which comprises a multi-reaction functional group and a hydrophilic group is synthesized, the screening of filling materials, a defoaming agent and other additives is integrated with the phenolic epoxy acrylic resin as a main body, and the acid resistance type protective ink with the good hydrofluoric acid resistance and the dehydration effect is prepared. According to the acid resistance type protective ink and the preparation method thereof, the superior adhesion is presented on OGS (One Glass Solution) touch screen glass, the time of the resistance to the 20% of hydrofluoric acid can reach more than 30 minutes, the film stripping can be achieved through the ordinary hot water, the harm to the glass is not produced, a protective film falls off in a flaked mode during film stripping, the filtration and the separation are easy, the degree of automation of the process is high, and the safe and environment-friendly effect is achieved.

The invention relates to the technical field of lithium battery materials, and in particular relates to a modification method for coating a silicon-carbon composite negative electrode material interface with modified asphalt. The asphalt-coated silicon-carbon composite negative electrode material is subjected to interface modification by utilizing specially selected phenolic resin, so that the silicon-carbon composite negative electrode material with high rate performance and high first rate is prepared. And a compact nano carbon coating layer with low pore defect degree is formed, so that the defects such as cracks and holes on the surfaces of nano silicon and graphite can be effectively repaired, irreversible consumption of a large number of active lithium ions in the charging and discharging process of a battery is avoided, and irreversible reduction of the battery capacity is remarkably reduced. Therefore, the asphalt-coated silicon-carbon composite negative electrode material is subjected to interface modification by utilizing the mutual synergistic effect of the phenolic resin and the asphalt, the capacity diving condition during high-current charging and discharging of the battery is obviously delayed, and the rate capability and coulombic efficiency of the material are improved.

The invention discloses a resin composition and preparation methods of a prepreg, a composite substrate and a PCB (printed circuit board) substrate. The resin composition comprises the following components in parts by weight: 20-30 parts of multifunctional epoxy resin, 50-78 parts of a modified acid anhydride, 10-22 parts of cyanate resin, 11-72 parts of a filler and 0.01-0.05 part of an accelerant. The preparation method of the prepreg comprises the following steps: mixing the resin composition with an organic solvent to obtain a resin solution, wherein the solid content by mass fraction in the resin solution is 50-65%; and immersing glass fiber cloth into the resin solution to obtain a preimpregnated material and then drying the preimpregnated material for manufacturing. The composite substrate is formed by stacking the prepregs according to a perdetermined number and pressing. The PCB substrate is formed by stacking the prepregs according to the perdetermined number, applying metal foils on double sides or single sides of the prepregs and pressing. The resin composition disclosed by the invention has the advantages of high heat resistance, low dielectric loss and significant cost advantage.

The invention provides a double-terminal amino active ester and a preparation method thereof, and a thermosetting resin composition. The double-terminal amino active ester has a structure representedby a structural formula (I), wherein the main chain structure of the double-terminal amino active ester has aryl ester groups and aromatic amino functional groups at the same time. According to the invention, by using the double-terminal amino active ester as a curing agent for an epoxy resin, the thermosetting resin composition of the double-terminal amino active ester has a low dielectric constant, a low dielectric loss factor, good heat resistance and toughness and excellent bonding force with metal.

The invention discloses a solvent-resistant scrubbing powder coating and a preparation method thereof. The preparation method comprises the following steps: firstly, preparing a modified polyester from raw materials, namely 40-70% of a polyurethane resin, 10-50% of a high-acidity polyester, 5-10% of aluminum hydroxide and 0.5-1% of aids; preparing the solvent-resistant scrubbing powder coating from raw materials, namely 40-60% of the modified polyester, 10-30% of a curing agent, 0.5-1% of the aids and 10-30% of packing. By adopting the preparation method, the modified polyester is firstly synthesized, two resins are mixed according to a certain ratio, the catalyst and the filler, namely the aluminum hydroxide, are further added, and the solvent-resistant scrubbing powder coating is prepared through mixing, extrusion and crushing; due to adoption of the specific solvent-resistant aids, the curing cross-linking density of a powder product can be increased, the surface density and the hardness can be improved, and excellent solvent-resistant properties can be achieved.

The invention discloses high-crystallization silver powder and low-cost heterojunction silver paste and a preparation method and application thereof.The preparation method comprises the steps that inorganic powder is subjected to surface smoothing treatment and then mixed with an anti-flocculating agent, a dispersing agent and water to obtain inorganic powder dispersion liquid, then the inorganic powder dispersion liquid is mixed with a reducing agent, a particle size control agent and water-soluble silver salt, and the high-crystallization silver powder and low-cost heterojunction silver paste is obtained. The surface of the inorganic powder is coated with a silver layer through a chemical reduction method, and therefore the silver-coated inorganic matter nanometer powder type high-crystallization ball-like silver powder is synthesized. According to the silver paste formula, the high-dispersity flaky silver powder is added to be matched with the high-crystallization silver powder, the conductivity of the silver paste is effectively improved, and meanwhile the fine printing performance of the silver paste is reserved.

Compared with the existing resin composition, the resin composition provided by the invention has the advantages of higher glass transition temperature, high heat resistance, high toughness and favorable dielectric property; the invention also provides a prepreg, an insulating film, a metal foil-coated laminated board and a printed circuit board which are prepared by using the resin composition.

The invention discloses an adhesive for diamond-grid dispensing insulation paper and a preparation method of the adhesive, and the adhesive comprises the following raw materials in percentage by mass:6.2%-7.1% of a solvent, 2.5%-3.1% of a curing agent A, 8.0%-9.0% of epoxy resin A, 20%-23% of epoxy resin B, 11.2%-13% of epoxy resin C, 1.1%-1.6% of a curing agent B and 44%-48% of acetone, whereinthe curing agent A is DDM, DDS or m-phenylenediamine; the curing agent B is dicyandiamide, a modified amine latent curing agent or a boron trifluoride ethylamine complex; the epoxy resin A is E44 epoxy resin, E51 epoxy resin or EF180 epoxy resin; the epoxy resin B is o-cresol formaldehyde epoxy resin, E20 epoxy resin or E12 epoxy resin; and the epoxy resin C is F44 novolac epoxy resin, F51 novolacepoxy resin or F53 novolac epoxy resin. Dispensing paper produced by adopting the adhesive prepared by the invention has the characteristics of high bonding strength and good storage performance, andhas good application prospect and economic benefit.