30 results about "Xanthochromia" patented technology

The invention discloses a method for producing Mengding Huangya tea. The method comprises the following steps of: selecting stout, strong, plump and solid simple buds; spreading, removing water, microwaving and heating slightly; bagging; performing primary stifling, secondary stifling and third stifling; intensively placing yellow tea after repeated stifling into a dustpan in which multiple layers of yellow paper are padded and covering the yellow tea with the multiple layers of the yellow paper; placing the dustpan in an air-conditioned room at the room temperature of between 25 and 28 DEG C for two days; keeping the temperature, performing oxidization and xanthochromia and adding fragrant; inspecting xanthochromia situation in stifling processes at any time; uniformly turning and stirring the bottom and the surface of the stifling yellow tea in the processes of the stifling so as to avoid non-uniform oxidization and xanthochromia; taking a tea sample out and molding manually after the tea sample has a basic style of the Huangya tea; slowly drying the molded Huangya tea at the low temperature of between 70 and 80 DEG C until the water content is between 5 and 6 percent; obtaining primarily processed Mengding Huangya tea; selecting to obtain genuine commodity Huangya tea; and cooling and storing at low temperature.

The invention relates to an optical adhesive and a preparation method thereof. The optical adhesive comprises the components of a methacrylic acid C4-12 alkyl ester polymer and a crosslinking curing agent, wherein the crosslinking curing agent is a tripolycyanamide compound, an isocyanate compound or an epoxy compound, and the molecular weight of the ester polymer is between 600,000 and 800,000. The preparation method of the adhesive comprises the following steps: precisely weighing the components of the methacrylic acid C4-12 alkyl ester polymer and the crosslinking curing agent in proportion, and mixing the components; defoaming the mixture and coating the mixture on an anti-mucous release film; and drying the anti-mucous release film in a drying oven, and then using another anti-mucous release film to compound with the anti-mucous release film. The adhesive prepared by the method has the advantages of high transparency, excellent weathering resistance and the like, has no xanthochromia with the passage of time, and simultaneously has high adhesive strength, and can be widely applied to adhering and fixing liquid crystal flat panel display and protective films and the like in the optical field.

The invention relates to a styrene volatilization inhibitor and unsaturated polyester containing the same. The styrene volatilization inhibitor is glyceride product generated by reacting C15-C18 acids and glycerol. According to the invention, a part of glyceride is creatively adopted as the styrene volatilization inhibitor, and the inhibition ratio achieves 60%-80% by utilizing the film-forming property of the glyceride. The unsaturated polyester resin which comprises the styrene volatilization inhibitor does not influence the secondary forming of resin, does not generate the xanthochromia and does not influence the appearance of a product after the resin is solidified.

The invention relates to a production technique of xanthochromia-resisting and illumination-resisting two-layer leather, and belongs to the technical field of leather. The production technique of the xanthochromia-resisting and illumination-resisting two-layer leather includes steps of taking two-layered leathers, and orderly performing rewetting, retanning, alkali extraction, neutralizing, dyeing, fat liquoring, fixation, drying, softening, leather grinding, milling to obtain the xanthochromia-resisting and illumination-resisting two-layer leather. The xanthochromia-resisting and illumination-resisting two-layer leather has the advantages of being excellent in stretching performance, good in wear and fading resistance, good in waterproof property, and excellent in xanthochromia resistance and illumination resistance.

This invention relates to a preparation of high transparent, high gloss polypropylene, especially relates to a method which is through reaction in situ of rosin based resin acids and higher fatty acid, on the spot generate transparent nucleater, accordingly obtain high transparent, high gloss polypropylene. It is produced by melt extrusion granulation at 190-210DEG C with 100 quality copies polypropylene, 0.1-0.8 quality copies rosin based resin acids, 0.1-0.8 quality copies higher fatty acid and 0.1-0.3 quality copies oxidation inhibitor. The required nucleater is generated by reaction in situ with rosin based resin acids and higher fatty acid in processing. This method is low cost, easy to implement, no pollution, produced preparation is high transparent and high gloss, tensile strength and rigidity is elevated, and can't cause preparation abnormal flavour and xanthochromia.

The invention provides a xanthochromia-resistant UV paint for an external wall sheet material, and a preparation method of the xanthochromia-resistant UV paint, wherein the xanthochromia-resistant UV paint has the properties of good water resistance, good alkali resistance, good washing resistance and good xanthochromia resistance. The xanthochromia-resistant UV paint for the external wall sheet material, disclosed by the invention, consists of the following raw materials in percentage by weight: 30%-40% of an aliphat polyurethane acrylic ester,10%-20% of an acrylic ester,10%-30% of a reactive diluent, 3%-6% of a photoinitiator, 0.1%-2% of a light stabilizer, 0.5%-2% of an auxiliary, and 10%-20% of a mixed solvent. The aliphat polyurethane acrylic ester adopts the polyurethane acrylic ester of which the functionality is 2-4; the acrylic ester is the pure acrylic ester.

The invention discloses a preparation method of the organic silicone elastomer synthesized by means of an ultraviolet light catalysis hydrosilylation. The ultraviolet light catalysis hydrosilylation is prepared from, by weight, 70-100 parts of VTBN silicone oil, 10-20 parts of containing hydrogen silicone oil, 0.004-0.025 part of a platinum photocatalyst, 0.04-0.5 part of a photosensitizer and 0.01-0.1 part of an inhibitor. The photosensitizer is added into the reaction system of the organic silicone elastomer prepared through the ultraviolet light catalysis hydrosilylation, the platinum photocatalyst and the photosensitizer are brought into play jointly, due to the added photosensitizer, the earlier stage rate of the platinum photocatalyst catalysis hydrosilylation can be increased or thefinal raw material conversion rate can be increased, the consumption of the platinum catalyst is reduced, and the production cost is lowered; by adopting a small amount of platinum catalyst, the xanthochromia condition can be effectively reduced; furthermore, the preparation method of the organic silicon elastomer is simple, no rigorous condition is needed, existing equipment does not need to beimproved, the method can be used for producing the organic silicon elastomer, and the improvement cost of a manufacturer is lowered.

The invention discloses a solvent-free polyurethane adhesive for a photovoltaic back plate and a preparation method of the solvent-free polyurethane adhesive. According to the preparation method, a polyhydric alcohol and diisocyanate are taken as basic raw materials, together with aids such as a catalyst, an antioxidant, a light stabilizer, a leveling agent and a silane coupling agent, a double-component polyurethane adhesive is prepared, two components are mixed according to a ratio when being used, macromolecules are formed through mutual reactions, and thus the purpose of cross-linking curing is achieved. The double-component polyurethane adhesive produced by using the method disclosed by the invention has good properties such as adherence, xanthochromia resistance, hydrolysis resistance and weather resistance, and is capable of meeting processing and use requirements of industries. After 2000 hours of hydrothermal aging testing, the interlaminar strength is kept at 4.0N/cm or greater, and in addition, defects such as bubbling or adhesive overflowing can be avoided. In addition, as no solvent is used, VOCs (volatile organic compounds) can be reduced, the adhesive has large economic benefits when being compared with a solvent type adhesive in the market, and requirements of conventional environment protection policies and consumer markets on environment-friendly products canbe well met.

The invention relates to aqueous coiled material over-printing vanish which comprises the following components in percentage by mass: 40-70% of an epoxy modified acrylic resin, 10-30% of a polyester resin, 4-15% of a high imino group resin, 3-6% of a sealed type isocyanate curing agent, 0.5-5% of a cosolvent, 0.2-1% of a leveling agent, 0.2-1% of a dispersant, 0.2-1% of a defoaming agent, 0.1-1% of a neutralizing agent and 10-41% of water. The invention further provides a preparation method of the aqueous coiled material over-printing vanish. The aqueous coiled material over-printing vanish provided by the invention is an environmental-friendly coating with water as a solvent together with a small amount of a cosolvent, has the advantages that 1), the vanish is not liable to combust or explode, small in volatile organic compound (VOC) emission and green and environmental-friendly; 2) the vanish is simple in production process, low in cost, good in leveling quality, good in adhesion property, xanthochromia resistance, high in solid content and low in viscosity; 3) the vanish has the characteristics of light colors, high clearness and transparency, good light and color retention andweather resistance, coating fullness and good thermal resistance; 4) the vanish is good in chemical resistance, stable with acids, alkalis, alcohols, oils and the like; 5) the vanish is good in size stability and medium permeation prevention.

The invention discloses a fluorated hydrogen abstracting type macromolecular photoinitiator, and a preparation method and application thereof. The fluorated hydrogen abstracting type macromolecular photoinitiator is obtained by free radical copolymerization of a photoinitiator-containing alkylene monomer, a coinitiator-containing alkylene monomer, a fluorocarbon-chain-containing alkylene monomer and a common alkylene monomer. The fluorated hydrogen abstracting type macromolecular photoinitiator can connect micromolecular coinitiator amine and a photoinitiator to a macromolecular chain, the defects such as proneness to transfer, xanthochromia and poor stability of conventional micromolecular photoinitiators are overcome, and photo-initiation efficiency is improved; surface self-assembly of the fluorated macromolecular photoinitiator can be achieved through ultralow surface energy and ultralow surface tension of fluorine atoms to form a gradient self-assembly layer with concentration gradually reduced from top to bottom, the superficial photoinitiator is enriched relative to a bulk layer and can preferably have photopolymerization to form a film layer capable of preventing oxygen from diffusing to enter a photopolymerization system, and accordingly, good oxidation and polymerization resistance effect is achieved.

The invention relates to a blue photoresistance composition and a colorful optical filter. The blue photoresistance composition comprises the following components in parts by weight: 100 parts of alkali soluble resin, 100 parts of optical active compound, 10 parts of photoinitiator, 200 parts of organic solvent and 50 parts of blue pigment dispersion, wherein the optical active compound contains aliphatic acrylate oligomers with the number of functional groups being more than 4, and/or aliphatic acrylate monomers and compounds containing olefin double bond. The blue pattern photoresistance layer of the colorful optical filter contains the blue photoresistance composition. By the invention, the xanthochromia of the optical active compound can be reduced, color difference of the blue photoresistance layer is reduced, flatness and no residue of the surface of a membrane layer are ensured, and the production requirement is finally met.

The invention provides an antibacterial shrink-proof ultravioresistant finishing method for a polyester/cotton fabric. The antibacterial shrink-proof ultravioresistant finishing method comprises the following steps: performing padding, predrying and baking treatment on the polyester/cotton fabric by use of a finishing bath fluid; then performing padding, predrying and baking treatment on the polyester/cotton fabric by use of a 20-30g/L nano ultravioresistant finishing agent, wherein the finishing bath fluid consists of a finishing agent, a catalyst, a softener, a penetrating agent and a pH regulator; the finishing agent consists of 30-50g/L teflon CO and 10-20g/L etherified resin; the catalyst is 6-15g/L magnesium chloride or iron chloride; the softener is 11-30g/L low-xanthochromia amido-modified organosilicon; the penetrating agent is 2g/L natrium alkylsulfate; the pH regulator is 0.5-5g/L acetic acid. The low-xanthochromia amido-modified organosilicon and natrium alkylsulfate are added into the finishing bath fluid, so that the combination property of the fabric and teflon CO is improved.

The invention discloses a PU xanthochromia-resisting tripolymer curing agent formula and a producing method, and belongs to the technical field of coating production. According to the PU xanthochromia-resisting tripolymer curing agent, a tripolymer is firstly synthesized through methyl diisocyanate under the action of auxiliaries of ethyl acetate, antioxygen, an initiator, a catalyst, a terminating agent phosphoric acid and an ultraviolet absorbent UV-2 dodecanol, then hexamethylene diisocyanate and the tripolymer are mixed up, and the PU xanthochromia-resisting tripolymer curing agent is prepared. The gloss of the tripolymer in paint can be improved, xanthochromia resistance can be improved, the intermiscibility resin in the paint can be improved, the xanthochromia-resisting time can reach 1-3 years compared with a product in the prior art, the intermiscibility of the curing agent and resin in bright paint can reach 3:1, use and popularization are convenient, and the market prospects are wide.

The invention provides an adhesive special for a solar cell module. The adhesive comprises, by weight, 50-80 parts of room temperature vulcanized rubber, 2-20 parts of silicone oil, 40-80 parts of calcium carbonate, 2-10 parts of cross-linking agents, 0.5-15 parts of thixotropic agents, 0.1-1 part of adhesion promoter and 0.01-0.05 part of curing agents. The adhesive special for the solar cell module has the advantages of resisting damp-heat ageing, resisting ultraviolet ageing and resisting xanthochromia, the use performance of the adhesive special for the solar cell module is improved, and the sealing performance of the solar cell module can be guaranteed.

The invention relates to a beta-hydroxyalkyl amide synthesis process, which comprises the steps of inputting diethanol amine and silica into a reaction kettle, adding a multi-component composite catalyst into the reaction kettle, introducing argon gas for three times for gas replacement, extracting gas in the reaction kettle until the pressure reaches negative pressure, stirring and dripping dimethyl adipate into the reaction kettle, heating for two times and constantly stirring and introducing argon gas at the same time, and obtaining the finished product beta-hydroxyalkyl amide after the product cools down naturally. The beta-hydroxyalkyl amide synthesis process has the advantages of reasonable process, reliable performance and the like; under the catalytic action of the multi-component composite catalyst, ammonolysis of dimethyl adipate is realized through diethanol amine, ,and the beta-hydroxyalkyl amide is obtained, besides, sodium carbonate can accelerate the reaction, and sodium sulfite and sodium citrate have efficacy of xanthochromia resistance. The structure of the reaction kettle body for beta-hydroxyalkyl amide synthesis is reasonable, and temperature control and stirring effect are good; as reaction is performed under segmented temperature in the reaction kettle, mass production requirement can be satisfied.

The invention provides an application of tri(hydroxymethyl) methyl amine and a moisture absorbing packing material. In a patch of ketotifen fumarate provided with an adhering agent layer on a supporting body, the tri(hydroxymethyl) methyl amine and the moisture absorbing packing material are used for improving the content stability of the ketotifen fumarate and inhibiting the xanthochromia.

This invention relates to a compounding agent for plant velvet glue performance and its preparation, and also provides its usage and its application. This compounding agent is a aqueous complex, and its ingredients are asepsis, of course it is a complete newly type compounding agent for plant velvet glue performance. It includes a chemical(its molecular formula), penta-erythritol, water drain polymer, acrylate latex, water, accelerant, hand feeling regulator and ultraviolet stabilizing agent. Its craft is simple and convenient, and its cost is low relatively because of its ingredients obtained easily. The latex can be used after conducting simple mixture on the base of latex already existing, and its usage is simple and convenient and, to some extent, it can also overcome the insufficience of latex performance, which highly improves anti- xanthochromia ability, intensity and anti-abrasion ability ot the ultimate plant velvet product.

The invention discloses benzophenonen photoinitiator containing cyclic acetal represented by a below formula and a method for preparing the same. 4-hydroxy benzophenonen or derivative of the 4-hydroxy benzophenonen and methanal as raw materials react for 1 to 10 hours at the temperature of 10 to 70 DEG C with acid water solution as a solvent to obtain the benzophenonen containing cyclic acetal. By introducing cyclic acetal into the benzophenone and due to the fact that the cyclic acetal can be used as assistant igniting agent of the benzophenone, the compound can be used as photoinitiator independently to replace a benzophenonen/amine igniting system so as to reduce xanthochromia and toxicity caused by an assistant amine igniting agent, thereby having wide application prospects in the field of light curing industry.

The invention discloses environment-friendly latex. The environment-friendly latex is prepared from the raw materials in parts by weight: 25-45 parts of distilled water, 5-10 parts of boracic acid calcium, 5-8 parts of expanded perlite, 9-14 parts of a silane coupling agent, 7-14 parts of carbon powder, 5-15 parts of nanometer titanium dioxide, 6-12 parts of nanoscale silicon dioxide, 20-30 parts of butyl etherification DCD resin, 4-9 parts of aluminum paste, 4-9 parts of bentonite, 1-3 parts of a bactericide, 2-4 parts of butyl acetate, 4-12 parts of a curing agent (methyl ethyl ketone), and 5-10 parts of titanium dioxide. The environment-friendly latex provided by the invention has the advantages of good applying performance, better ageing resistance, better xanthochromia resistance, and better stickiness, and can prolong the service life of the latex.

The invention relates to the technical field of animal model construction, in particular to an application of MDSCs in constructing a BA animal model and a construction method of a BA mouse model. Theinventor finds through a test that MDSCs plays an important role in BA and can be used for constructing the BA animal model. The construction method of the BA mouse model adopts a neonatal mouse by using MDSCs and adopts non-viral infection, so that the method is simple and safe and the modeling success rate is close to 100%, the mouse xanthochromia appears on the fourth day of birth and jaundiceappears early. The liver pathological section result shows that the symptom is as same as that of BA and no RRV is left in liver. The model can be used for nosetiologic research of BA and research ofdiagnosis and treatment methods.