46results about How to "Solve easy yellowing" patented technology

The invention provides high-temperature expanded polymer microspheres and a preparation method thereof and belongs to expandable particles. The high-temperature expanded polymer microspheres are prepared from a thermoplastic resin shell body and a foaming agent packaged in the shell body, wherein an oil-phase composition composed of a polymerizable monomer and a crosslinking agent can be dispersedinto a water-phase dispersed composition; in the presence of the foaming agent, the polymer microspheres coated with the foaming agent are directly prepared through carrying out suspension polymerization reaction and coating the foaming agent in situ; the high-temperature expanded polymer microspheres are characterized in that the oil-phase composition contains the polymerizable monomer and the crosslinking agent, and also comprises a silane coupling agent; the foaming agent is a mixture of isopentane, isooctane and n-octane; the high-temperature expanded polymer microspheres provided by theinvention have the advantages of complete core-shell structure, uniform grain diameter distribution, high foaming agent coating efficiency, good heat resistance of a shell-layer polymer, relatively high initial temperature in an expansion process, relatively high highest expansion temperature and high foaming ratio, have a relatively wide foam stabilizing temperature range, and are suitable for being applied to a thermoplastic resin, rubber or thermoplastic elastomer foaming and processing technology.

The invention relates to the field of textile finishing agent, in particular to supersoft hydrophilic block silicone oil compound and a preparation method thereof. The supersoft hydrophilic block silicone oil compound is composed of cations of the structural formula, wherein the n1 is the number of 5 to 10, the R is polyether group, and the degree of polymerization ranges from 3 to 50. The supersoft hydrophilic block silicone oil compound is applicable to handle finishing of fabric knitted by one or multiple fibers of cotton, dacron, chinlon and acrylic fibers and has softness, smoothness and looseness effects superior to those of amino-modified silicone oil, has excellent stability in acid and alkali resistance, electrolyte resistance, high temperature resistance, shearing resistance and the like and thoroughly solves the problems of easy demulsification, floating oil, roll banding, difficulty in refinishing and the like.

The invention relates to a thermally-expandable polymer microsphere for polyvinyl chloride resin foaming and a preparation method thereof, and belongs to the field of expandable particles. The thermally-expandable polymer microsphere consists of a thermoplastic resin shell and a foaming agent encapsulated in the shell; an oil phase composition composed of a polymerizable monomer and a crosslinkingagent is dispersed in an aqueous phase dispersion composition; and in the presence of the foaming agent, the foaming agent is coated in situ through a suspension polymerization reaction to directly prepare the polymer microsphere coated with the foaming agent. The thermally-expandable polymer microsphere is characterized in that the oil phase composition comprises a silane coupling agent in addition to the polymerizable monomer and the crosslinking agent, and the foaming agent is a mixture of isopentane, isooctane and n-octane. The invention provides a thermally-expandable polymer microspherewhich has the advantages of complete core-shell structure, uniform particle size distribution, high foaming agent coating efficiency, good heat resistance of a shell polymer, high initial temperatureduring expansion, high maximum expansion temperature, high foaming ratio, and wide foam stabilizing temperature range, and is special for foaming polyvinyl chloride resin.

The invention discloses a preparation method of titanium dioxide for printing ink. The preparation method comprises the following steps of a, calcining metatitanic acid squeezed filter cake subjected to treatment at a temperature of more than 900 DEG C to obtain a titanium dioxide crude product, and preparing TiO2 slurry, b, feeding steam into the TiO2 slurry, and adding an aluminum-containing compound into the TiO2 slurry, c, adjusting slurry pH to 4-8 and keeping the pH, d, carrying out curing for 10-30min, e, carrying out filtration to remove soluble salt, carrying out drying and carrying out heat treatment, and f, carrying out air-flow crushing and simultaneously, adding an organic surface conditioning agent into the titanium dioxide to obtain a finished product. Compared with the prior art, the titanium dioxide obtained by the preparation method does not yellow easily, has good weatherability and heat resistance, and has high luster, high tinting strength, high masking performances, low wear resistance, excellent dispersibility and excellent granule size distribution in a solvent system and an aqueous system.

The invention discloses a high-covering black UV silkscreen printing ink. A preparation method for the high-covering black UV silkscreen printing ink comprises the following steps: preheating acrylate and then mixing the preheated acrylate with a part of active monomer; then adding a dispersant and carrying out primary dispersion; then successively adding pigment and a filling material and carrying out secondary dispersion; carrying out grinding to obtain color paste; mixing a phosphine oxide photoinitiator with residual active monomer; and adding the color paste, an organosilicon antifoaming agent and an organosilicon leveling agent and carrying out uniform dispersion so as to obtain the high-covering black UV silkscreen printing ink. The high-covering black UV silkscreen printing ink provided by the invention is reasonable in composition; all the components are in good compatibility; and the prepared printing ink has excellent comprehensive properties and good storage performance, and the viscosity of the printing ink is suitable for silkscreen printing. The printing ink does not need increase in the usage amounts of components like carbon black, prevents unfavorable influence of the components on the appearance and light shading performance of a product, and can meet light shading requirements of the product after only one printing and under the condition of a thickness of 7 to 8 micrometers, so unexpected technical effects are obtained.

The invention discloses a highly-anti-yellowing anti-precipitation halogen-free flame-retardant thermoplastic elastomer composition and a preparation method thereof. The highly-anti-yellowing anti-precipitation halogen-free flame-retardant thermoplastic elastomer composition comprises the following raw material components by mass percentage: 15-30% a styrene-based thermoplastic elastomer, 10 to 25% of polyolefin resin, 15 to 25% of a plasticizer, 10 to 20% of a char forming agent, 15 to 30% of a phosphorus-nitrogen flame retardant, 0.5 to 3% of a flame retardant synergist, 0.1 to 1% of an anti-oxygen agent, 0.1 to 1% of an anti-aging agent and 0.1 to 1% of a processing aid. Through high char forming property of crosslinked polystyrene powder, a triazine char forming agent is compounded, the triazine char forming agent replaces traditional polyphenylene ether to act as the char forming agent of the thermoplastic elastomer TPE, and the highly-anti-yellowing anti-precipitation halogen-free flame-retardant thermoplastic elastomer composition has good flame retardant property and physical property, solves the problem that use of the polyphenylene ether is liable to cause yellowing, hasexcellent UV resistance, and can pass anti-precipitation tests with higher requirements.

The invention discloses a preparation method of pollen anti-oxidation softener, which belongs to the technical field of softener preparation. The invention collects fresh rapeseed flower pollen, grinds and sieves it, mixes it with ethanol solution, heats it in a water bath, and suction-filters it to obtain a filtrate, concentrates it and extracts it with petroleum ether, distills and concentrates it to obtain a pollen antioxidant liquid, mixes it with chloroacetic acid, etc., and heats it in a water bath, and filters The obtained filtrate is mixed with alkylphenol polyoxyethylene ether and deionized water, heated in a water bath, methanol is added dropwise, heated in an oil bath, cooled, and ultrasonically dispersed to prepare a pollen antioxidant softener. The beneficial effects of the present invention are: the preparation steps of the present invention are simple, the obtained product has good softness and biodegradability, and the durability is improved by more than 18.2%; the pollen anti-oxidation liquid prepared by using rape flower pollen can effectively solve the problem of easy yellowing after use The problem.

The invention belongs to the field of amino silicon oil, and discloses a preparation method of a high-temperature-resistant alkali type amino silicon oil emulsion, which comprises the following steps:S1, preparing 40-50 parts of amino silicon oil, 10-20 parts of an emulsifier, 35-40 parts of deionized water, 5-10 parts of a glycerol additive and 3-6 parts of trifluoromethyl maleic anhydride for later use; S2, adding an emulsifier into the high-shear emulsifying kettle, and starting to stir. According to the invention, trifluoromethyl maleic anhydride can be amidated with amino silicone oil, amino active hydrogen in the amino silicon oil structure is reduced and carboxyl is increased; therefore, the effect of reducing emulsion yellowing is achieved; the high temperature resistance and thealkali resistance of the amino silicon oil emulsion are improved; meanwhile, the emulsifier can improve the surface tension among various constituent phases in the emulsion, so that a uniform and stable dispersion system or emulsion substance is formed, the amino silicone oil emulsion has excellent stability, and the problems that the traditional amino silicone oil emulsion is easy to yellow and demulsify and poor in high-temperature resistance and alkali resistance are solved.

The invention provides glue capable of being used for bonding glass and metal and a preparation method of the glue. The glue is prepared from main body resin, auxiliary resin, a dissolving medium and a functional auxiliary agent. Hydroxyl modified acrylic resin is taken as a main body, the polyester resin is taken as an auxiliary body, tackifying resin is added, and an isocyanate closed curing agent is combined for reaction, so that the prepared glue solves the defect that existing glue in the industry is easy to yellow under the condition of a heat transfer process, and the integrity, the material application range, the initial adhesion, the adhesion resistance and the like of the product are improved; and the glue has potential application value in the heat transfer printing industry.

The invention relates to a preparation method of a nano coating for an EVA (ethylene-vinyl acetate copolymer) film surface. The nano coating comprises the following components by mass percent: 15-20% of carbon nano tube, 5-15% of nano silica, 3-15% of fatty alcohol-polyoxyethylene ether, 3-5% of silane coupling agent, 3-5% of propylene glycol methyl ether acetate and 10-30% of organic solvent, wherein the mass ratio of fatty alcohol-polyoxyethylene ether to the silane coupling agent is (1:1)-(3:1); fatty alcohol-polyoxyethylene ether serves as a dispersing agent; the silane coupling agent serves as a binding agent; propylene glycol methyl ether acetate serves as a film forming aid. A film covered by a coat formed by the nano coating has electrical conductivity and low yellowing rate and simultaneously improves the photoelectric conversion rates of battery packs. The preparation method is simple in process and convenient to operate and can be used for efficiently dispersing and fixing the carbon nano tube and the silica nano tube on the EVA film surface uniformly.

The invention relates to a low-consumption stone-like coating and a preparation method thereof. The stone-like coating is prepared from the following raw materials in parts by mass: 100-120 parts of water, 1-3 parts of hydroxyethyl cellulose, 0.3-0.5 parts of a multi-functional additive, 120-140 parts of acrylate emulsion, 1-2 parts of a bactericidal preservative, 3.5-4.5 parts of a freeze-thaw resistant stabilizer, 3-4 parts of a coalescing agent, 0.2-0.5 parts of an alkali swelling thickene, 300-600 parts of sand, 100-300 parts of color sheets, 0.2-4.0 parts of a pH regulator, 10.0-40.0 parts of silica sol, 20.0-90.0 parts of styrene-acrylic emulsion, 40-60 parts of a slipping agent, 1-2 parts of an anti-freezing agent and 1-2 parts of a water-based defoaming agent. According to the invention, proper cellulose is screened out from different celluloses and is reasonably matched with the emulsion, so that the stability and constructability of a product are improved, and the water retention property and thixotropic property of the system are improved; the acrylic ester emulsion is selected, so that the problem that a stone-like coating using common styrene-acrylic emulsion is easy to yellow is effectively solved; and the problem that color difference between batches is difficult to control can be effectively solved through application of the color sheets.

The invention belongs to the technical field of textile digital printing, and in particular relates to a method for digital textile printing in a wet state. The method comprises the following processsteps of preparation of a pretreatment working fluid; squeegee treatment of uniformly squeegeeing the pretreatment working fluid on the dry textile; and a printing treatment of directly digitally printing, drying, steaming and washing the wet textiles after the squeegee treatment without the operation of drying. The method for digital textile printing in the wet state can solve the problems of weft skew, yellowing, pretreatment liquid and energy waste caused by pretreatment using a tentering setting machine in the prior art, and the digital printing products using the method are full and bright in colors.