62 results about "Vinyloop" patented technology

The invention relates to an organosilicon sealant for LED (light-emitting diode) packaging, belonging to the technical field of organosilicon sealants. The organosilicon sealant comprises a component A and a component B. The component A comprises 15-25 parts of divinyl polydimethylsiloxane silicon resin and 2-6 parts of platinum catalyst. The component B comprises 50-58 parts of divinyl polydimethylsiloxane silicon resin, 50-88 parts of methylhydropolysiloxane, 2-8 parts of reaction inhibitor, 30-40 parts of fumed silica, 2-10 parts of additive KH-560 and 20-25 parts of TiO2. The vinyl silicon resin, hydrogen-containing silicon oil and tetramethyltetravinylcyclosiloxane are subjected to addition reaction under the condition of the platinum catalyst to prepare the organosilicon electronic packaging adhesive with favorable comprehensive properties. The sealant is very suitable for LED packaging.

The invention discloses a preparation method for net-like methyl phenyl vinyl polysiloxane for LED packaging, and concretely relates to a preparation method for a vinyl polysiloxane prepolymer containing methyl and phenyl groups and possessing a net-like structure. According to the preparation method, phenyl silsesquioxane, diphenylsiloxane, octamethyl cyclotetrasiloxane, tetramethyl tetravinyl cyclotetrasiloxane and an end-capping reagent are subjected to a copolymerization reaction under an alkali catalytic condition according to a certain, so that the methyl phenyl vinyl polysiloxane prepolymer which possesses a net-like structure and is a liquid at room temperature is obtained. The prepolymer and an organic silicon monomer or prepolymer containing a silicon-hydrogen structure are subjected to addition polymerization, so that organic silicon resin with excellent performances for LED packaging is prepared. The method simultaneously overcomes the disadvantages that a chlorosilane hydrolysis method generates too much waste acids and is complex in post treatment, the molecular weight distribution is wide and the like, and is the method is an environment-friendly good-repeatability technology.

The invention relates to a production technology of high-transparency and high-vinyl methyl vinyl silicon rubber. The production technology comprises the following steps of performing primary filtering and fine filtering on DMC, so as to remove colored impurities including iron rust and the like; removing impurities from auxiliary materials, VMC and divinyltetramethyldisiloxane through vacuum bubble dehydration and physical dynamic adsorption; using a high-temperature and low-pressure dehydration technology, adding the dehydrated material into a polymerizing kettle, adding a catalyst, VMC and a termination sealing agent to polymerize, and balancing after the polymerizing is completed; preheating the balanced rubber material, and then sending into a low molecule removal device to remove low molecule and produce the rubber. The production technology has the advantages that the problems of easiness in crosslinking and broad distribution of molecular weight in the high-vinyl raw rubber are solved; in the low molecule removal process, the gradual heating manner is adopted, and the problems of falling and crosslinking of vinyl, instability of vinyl content, slight yellowing of a product and the like due to continuous high temperature of local part in the raw rubber production heating process are solved.

The invention discloses a waterborne epoxy fireproof coating as well as a preparation method and application thereof. The waterborne epoxy fireproof coating is composed of a component A and a component B. The component A comprises a waterborne epoxy emulsion, a vinyl-epoxy emulsion, a carbon forming catalyst, a carbon forming agent, a foaming agent and a flame retardant; and the component B comprises a curing agent and refractory fibers. The water-based epoxy fireproof coating disclosed by the invention has the same excellent sealing performance as a solvent-free epoxy fireproof coating and a high-solid-content epoxy fireproof coating, has excellent corrosion resistance, UV irradiation resistance, water resistance and organic solvent resistance, and can be used in a severe outdoor environment. According to the fireproof coating, self-made emulsions are preferably selected, the structure of a film forming matter is optimized and adjusted, and fireproof efficiency is high. Meanwhile, water is selected as a diluent, so coating problems of an original epoxy fireproof coating are fundamentally solved, a water-based system is more environmentally friendly, and the coating belongs to a new-generation fireproof coating technology.

The invention relates to a preparation method of fluorinated polysiloxane raw rubber with terminal groups containing vinyl. The preparation method comprises the following steps: (1) carrying out heating dehydration on sodium hydroxide and divinyl tetramethyl disiloxane, carrying out heating reflux, cooling, filtrating, reducing pressure of filtrate so as to remove impurities so as to obtain solid powder, sealing and storing; (2) heating vinyl dimethyl silanol sodium salt in the step (1) and a fluorine-containing monomer (3,3,3-trifluoropropyl)methylcyclotrisiloxane, dewatering, continuously heating, and carrying out reduced pressure so as to remove low-boiling-point substances; (3) adding the fluorine-containing monomer (3,3,3-trifluoropropyl)methylcyclotrisiloxane and tetravinyl tetramethyl cyelo tetrasiloxane to a polymerization reactor, heating, dewatering, adding vinyl dimethyl silanol sodium salt alkali-gel, carrying out polymerization reaction, neutralizing by using a neutralizing agent, heating and removing low-boiling-point substances to obtain the fluorinated polysiloxane raw rubber with the terminal groups containing vinyl. The preparation method is used for producing the hot vulcanized fluorinated polysiloxane raw rubber with oil resistance and solvent resistance; the hot vulcanized fluorinated polysiloxane raw rubber serving as sealing materials, coating materials, gasket materials and the like is widely applied to the fields such as aviation, aerospace, automobiles, petrochemical engineering and artificial organs.

The invention relates to relates to a flame retardation type exterior coating capable of automatically cleaning, the coating takes epoxy resin slurry and methacrylate as monomer. The exterior coating comprises the following raw materials by weight: 20-40 parts of vinyl epoxy resin slurry, 5-30 parts of n-butyl methacrylate, 0.5-2.5 parts of phosphate tri(2-chloropropyl)ester, 1-10 parts of hydrophobic silica, 0.1-5 parts of titanium dioxide, 0.1-2 parts of levelling agent, 0.1-2 parts of antifoaming agent, 0.5-5 parts of silicon auxiliary agent and 1-5 parts of initiator. When the coating is used, the monomer initiates a polymerization through a radical initiator to form a thermosetting polymer, a contact angle with water is greater than 110 DEG, and a roll angle is less than 65 DEG. The water-repellency grade is grade 4, and the oil-repellency grade is grade 2. The hydrophobicity can reach 96%, the heat conduction coefficient is 0.032W/mK, the combustion grading accords with a grade C, and all the indexes can reach an international relative standard.

The invention discloses a corrosion-resistant composite protective layer material for neodymium iron boron, and the composite protective layer material comprises: a substrate layer which is spin-coated on the neodymium iron boron; a protective layer coated on the substrate layer, wherein the protective layer is prepared from the following raw materials in parts by weight: 10-20 parts of fluorine-containing methacrylate, 30-50 parts of epoxy resin, 40-60 parts of vinyl epoxy resin, 5-10 parts of an additive, 0.5-1.5 parts of a curing agent, 1-2.5 parts of a filler and 20-50 parts of deionized water. According to the composite protective layer material, through the arrangement of the double-layer structure of the base layer and the protective layer, the surface corrosion resistance of the neodymium-iron-boron permanent magnet can be improved, the wear resistance and the heat resistance of the neodymium-iron-boron permanent magnet can be improved, and the service life of the neodymium-iron-boron surface protective layer is prolonged.

The invention discloses a coating for coating a plastic bottom shell of a notebook computer. The coating comprises a primer and a finish; the primer comprises a component A and a component B, and the mass ratio of the component A to the component B is 100: (2-5); the component A is prepared from 50 to 70 parts of carboxyl-containing hyperbranched poly (amine-ester) acrylate, 10 to 20 parts of carboxyl-terminated aromatic hyperbranched polyester, 2 to 4 parts of functional additive and 20 to 30 parts of solvent A; the component B is prepared from the following components in parts by weight: 60 to 80 parts of aziridine cross-linking agent XR-100 and 25 to 35 parts of butyl acetate; the finish paint is prepared from the following components in parts by weight: 60 to 75 parts of hyperbranched perfluorinated polyurethane acrylate oligomer, 3 to 5 parts of 4-vinyl-2, 8-bis (trifluoromethyl) quinoline, 2 to 4 parts of 2, 4, 6-trivinyl boroxane, 0.1 to 0.3 part of 1-allyl-3-vinyl imidazole chlorine salt, 4 to 6 parts of matting powder, 0.8 to 1.2 parts of a flatting agent, 1 to 2 parts of a dispersing agent, 0.8 to 1.2 parts of an initiator and 40 to 50 parts of a solvent B. The coating for coating the plastic bottom shell of the notebook computer, disclosed by the invention, is good in impact strength, excellent in wear resistance, heat and humidity resistance, cold and hot cycle resistance and heat-resistant stability, and sufficient in environmental protection property and adhesive force.

The invention discloses vinyl silicon resin for a moderate-refractive-index LED. The vinyl silicon resin is prepared from, by weight, 100-105 parts of phenyl trimethoxysilane, 10-20 parts of tetravinyl tetramethyl cyelo tetrasiloxane, 20-60 parts of distilled water, 30-50 parts of divinyl tetramethyl disiloxane, 100-200 parts of solvent and 3-5 parts of catalyst. The invention further provides a preparation method of the vinyl silicon resin. The phenyl trimethoxysilane, the tetravinyl tetramethyl cyelo tetrasiloxane, the distilled water, the divinyl tetramethyl disiloxane, the solvent and the catalyst are added into a container, the temperature is improved to be 40-60 DEG C, the constant temperature is kept for 4-8 hours while stirring, the temperature is improved to be 100-130 DEG C, constant-temperature reaction is performed for 4-8 hours while stirring, reaction liquid is subjected to washing with the distilled water till the reaction liquid is neutral, and then reduced-pressure distillation is performed under the condition that the temperature is controlled to be 200 DEG C and the pressure is controlled to be -0.096 MPa to obtain the vinyl silicon resin for the high-light-transmittance moderate-refractive-index LED. The vinyl silicon resin prepared by means of the preparation method is better in stability.

The invention discloses an environment-friendly plastic which is characterized by being prepared from the following raw materials in parts by weight: 15-25 parts of cinnamic acid modified plant fibers, 30-40 parts of vinyl beta cyclodextrin quaternary ammonium salt, 45-55 parts of 2-vinylpyrazine/methylvinylsilicate Fluorene/1,3-adamantanediol monoacrylate copolymers, 1-2 parts of initiators, 4-6parts of epoxysuccinic acid and 5-8 parts of epoxy-terminated hyperbranched polyphosphate. The invention also provides a preparation method thereof. The environment-friendly plastic disclosed by the invention is excellent in comprehensive performance, good in mechanical property, water resistance, flame retardance and oxidation resistance, capable of being completely degraded after being discarded, and small in environmental influence.

The invention discloses a heavy release film for an OCA optical adhesive, wherein the heavy release film is used for being attached to one side of an OCA optical adhesive layer and clamping the OCA heavy release film layer in the middle together with a light release film on the other side, and comprises a release film base material and a release agent layer coated on the surface of the release film base material, wherein the release agent layer is prepared from an ultraviolet light curing release agent prepared from the following raw materials in parts by weight: 50-150 parts of polybutadienepolyurethane, 50-90 parts of polyacrylate resin, 20-40 parts of 1,3-dioxolane, 20-50 parts of tetramethyl tetravinyl cyclotetrasiloxane, 25-55 parts of an octadecyl methacrylate active monomer diluent, 20-40 parts of tetrahydrofuran and 1-5 parts of an initiator, namely 2-hydroxy-2-methyl-1-phenyl-1-acetone. The ultraviolet curing release agent of the heavy release film does not need high-temperature baking and can bear high-temperature treatment during OCA optical adhesive curing.

The invention belongs to the technical field of organic and inorganic nano hybrid materials, and discloses T10 polyhedral oligomeric silsesquioxane containing tetraethylene hexaphenyl bifunctional groups and a preparation method of the T10 polyhedral oligomeric silsesquioxane. The preparation method comprises the following steps: dissolving vinyltriethoxysilane in isopropanol, and then adding into a mixed solution containing potassium methoxide and water to obtain tetrahydroxy tetravinyl cyclotetrasiloxane; the preparation method comprises the following steps: dissolving tetraethylene hexaphenyl bifunctional group T10 polyhedral oligomeric silsesquioxane in 1, 4-dioxane, adding phenylsilane and a catalyst, and reacting under the protection of inert gas to obtain the tetraethylene hexaphenyl bifunctional group T10 polyhedral oligomeric silsesquioxane. The method has the advantages of simple reaction process, definite product structure and excellent solubility in common solvents, and can be applied to intercalation modified montmorillonite, hydrotalcite and other inorganic materials to increase the interlayer spacing of the inorganic materials and the like.

Polar modifier systems based on a blend of DTHFP, ETE, TMEDA, DMTHFMA and/or functionally similar compounds with BDMAEE and SMT are used to make block copolymers having high levels of pendant vinyl double bond repeat units, which is through highly selective 1,2-bond butadiene addition, low vinylcyclopentane formation, unimodal narrow molecular weight distribution, and a low level of randomized co-monomer repeat units. The block copolymers have very high levels of 1,2-vinyl content and high 3,4-vinyl bond addition of the conjugated diene monomer and low vinylcyclopentane content. The polar modifier systems provide a fast polymerization rate, with a unimodal narrow molecular weight distribution. The polar modifier systems allow operation at a higher temperature than in prior art systems, which reduces cooling requirements.

The invention discloses a graphene bottom sealing adhesive and a preparation method thereof. The method comprises the following steps: step 1, weighing of raw materials in proportion; step 2, preparation of a component A: adding octamethylcyclotetrasiloxane, tetramethyltetravinyl cyclotetrasiloxane and tetramethyldivinyl disiloxane into a reaction furnace, carrying out heating, performing vacuumizing for reaction, then conducting adjusting to normal pressure, adding tetramethylammonium hydroxide, and continuing heating for reaction; step 3, preparation of a component B: mixing and stirring a part of the component A with hydrogen-containing silicone oil, graphene powder, an additive and MQ resin, and carrying out vacuumizing to obtain the component B; and step 4, matching the remaining component A with the remaining component B according to a ratio so as to obtain obtain a mixture serving as the bottom sealing adhesive. The invention also provides the graphene bottom sealing adhesive prepared by using the method. The bottom sealing adhesive prepared by the invention can be rapidly cured, has better mechanical properties and aging resistance, also has better hydrophobicity, and is suitable for photovoltaic bottom sealing.

The invention discloses a three-functional-group hyperbranched polysiloxane crosslinked high-strength and high-toughness composite hydrogel and a preparation method thereof. The preparation method comprises the following steps: 1) adding 1 part by weight of cellulose nanofibril and 1-30 parts by weight of acrylamide and/or acrylate monomers into a container, adding 60-300 parts by weight of water, and conducting mixing to form a uniform solution; 2) under the condition of ice-water bath, adding 0.1-1 part by weight of hyperbranched polysiloxane with three functional groups simultaneously containing vinyl, epoxy group and alkyl and 0.0005-0.002 part by weight of initiator into the solution obtained in the step 1), uniformly conducting stirring, and conducting reacting at 25-60 DEG C for 4-48 hours to obtain high-strength and high-toughness composite hydrogel. The molar ratio of vinyl, epoxy group and alkyl in the three-functional-group hyperbranched polysiloxane is 10:(1-6):(1-6).