306results about How to "Improve anti-yellowing effect" patented technology

The invention discloses an LOCA (Liquid Optical Clear Adhesive), and a preparation method and application of the LOCA. The LOCA is prepared from (A) 100 parts of (methyl) acryloyloxy alkylate polysiloxane, (B) 0 to 200 parts of hydroxyl or alkoxyl end-capping poly dialkyl siloxane, (C) 0 to 100 parts of organic silicon resin, (D) cross-linking agent which occupies 0 to 10 percent of the total amount of (A), (B) and (C) and connected with silicon and can be used for hydrolyzing groups, (E) 0.01 to 5 parts of photoinitiator, (F) 0.01 to 5 parts of polymerization inhibitor and (G) 0.0001 to 2 parts of condensation catalyst. The LOCA disclosed by the invention not only can be cured through an ultraviolet irradiation mode, but also can be cured through a moisturizing mode, and the LOCA can be widely applied to the adhesion of display screens, touch screens and optical devices.

Individual compounds that provide effective toning (or bluing) to combat yellowing within polyester articles (such as bottles, containers, and the like) are provided. Such a novel toner permits effective neutralization of yellowness while also providing highly desirable low haze and increased brightness due to a sharp absorption peak within the needed range of wavelengths (e.g., from about 565 to 590 nm) and a narrow half-height band width. Furthermore, such an individual compound is preferably liquid in nature and may thus be incorporated within an added ultraviolet absorber solution or shelf-stable dispersion to facilitate addition within target polyesters at various stages of production. The particular UV absorbers desired as additives within target polyesters also tend to exhibit certain yellowing effects that require attention as well. The inventive single bluing agent compound thus also accords effective neutralization of such UV absorber yellowing as well. Methods of production and liquid UV absorber/individual bluing agent formulations are also encompassed within this invention.

The invention provides a textile fluoride-free waterproofing agent and a preparation method thereof and textile applying the fluoride-free waterproofing agent. The fluoride-free waterproofing agent is prepared from the components by mass of 5%-30% of fluoride-free polymer, 5%-30% of (modified) polyethylene wax emulsion, 3%-15% of chemically modified chitosan, 0.001%-10% of auxiliary and the balance of water. Acid, acid anhydride or isocyanate materials are taken as modifiers for chemically modifying amino of the chitosan, functional groups such as carboxyl, ester and hydroxyl are introduced while the amino is reduced, the compatibility is good, contents and the matching relationship of all components in the fluoride-free waterproofing agent are adjusted so that the fluoride-free waterproofing agent has excellent waterproofness and yellow degeneration resistance, washing waterproofness can still be maintained to be level 5 after the fluoride-free waterproofing agent is used for washing the textile for 10 times, and the yellow degeneration resistance can also be as high as level 5.

The invention belongs to the field of organosilicon materials and discloses a silicon boron tackifier, a preparation method thereof and application thereof in double-component LED packaging gel. The preparation method includes: subjecting unsaturated monomer with epoxy group and polysiloxane with hydrogen group to hydrosilylation to obtain epoxy modified polysiloxane; subjecting silane monomers R1Me2SiOR, PhR2Si(OR)2, R4Si(OR)3 and Si(OR)4 to hydrolytic condensation under an acidic condition to obtain a phenyl polysiloxane prepolymer; mixing the epoxy modified polysiloxane with the phenyl polysiloxane prepolymer, adding borate, and allowing reaction under action of alkaline catalysis to obtain the silicon boron tackifier. The silicon boron tackifier can be directly added into an LED packaging silica gel system, adhesion between the LED packaging silica gel and lamp beads is improved, requirements on sealing the lamp beads are met, and the silicon boron tackifier has high refractive rate and good yellowing resistance.

The invention provides silicone gel. The silicone gel is prepared from, in parts by weight, a component A and a component B, wherein the component A comprises 0.1-100 parts of vinyl silicone oil, 0.1-100 parts of hydrogen-terminated silicone oil, 0.1-30 parts of hydrogen-containing silicone oil and 0-1 part of an inhibitor, and the component B includes 100 parts of vinyl silicone oil and 0.0001-0.5 part of a platinum catalyst. The invention also provides a preparation method of the silicone gel. The provided silicone gel has good light transmittance and excellent anti-yellowing properties, thesilicone gel can be used in the optical field, and can also be applied to potting protection of multiple electronic products, meanwhile, the production process of the product is simple, and only thecomponent A and the component B are mixed uniformly at a ratio.

Belonging to the field of packaging materials, the invention relates to an LED packaging material, its preparation method and application. The material is composed of the following components by weight: 100 parts of epoxy resin, 60 parts of a crosslinking agent, 2 parts of a crosslinking accelerant, 0.1-5 parts of an antioxidant, 0.05-0.25 part of an ultraviolet stabilizer, and 0.05-0.50 part of an ultraviolet absorber. In the invention, a sulfur-containing benzotriazole compound is adopted as the ultraviolet absorber, which has excellent performance and can reach a good synergistic effect with the antioxidant and the ultraviolet stabilizer, and can be used as the ultraviolet absorber of the LED packaging material. Compared with original ultraviolet absorbers, the ultraviolet absorber effectively enlarges the ultraviolet absorption wavelength and the absorption strength, thereby reducing the dosage of the ultraviolet absorber, lowering the cost, and improving the yellowing resistance of an adhesive film. The prepared LED adhesive film product has good stability, and has wide application prospects in industrial production.

The invention relates to a composite heat-yellow discolouration resistant finishing agent of chinlon, spandex and a blended fabric of the two. The composite heat-yellow discolouration resistant finishing agent mainly comprises a potentiating agent, a synergist and a main antioxidant. After the chinlon, the spandex and the blended fabric are treated by a solution of the composite heat-yellow discolouration resistant finishing agent, the yellow discolouration and colour change of the chinlon, the spandex and the blended fabric can be remarkably alleviated. The composite heat-yellow discolouration resistant finishing agent is low in cost, simple in treatment process and high in industrial application value.

The invention discloses an ABS (acrylonitrile-butadiene-styrene) plastic for automobile inner ornaments and a preparation method thereof. The ABS plastic for automobile inner ornaments comprises the following components in parts by weight: 100 parts of ABS resin, 80-120 parts of PC (polycarbonate) resin, 5-15 parts of EPDM (ethylene-propylene-diene monomer) resin and 1-3 parts of anti-yellowing agent. The preparation method comprises the following steps: proportionally weighing the raw materials, uniformly mixing, melting and compounding, and extruding and granulating. The ABS plastic for automobile inner ornaments has the advantages of favorable formability, favorable mechanical properties, high impact strength, high temperature resistance, favorable ultraviolet resistance, favorable light aging resistance and the like, and can be used for preparing automobile inner ornaments by an injection molding technique.

The invention discloses a single-component oxime-removed silicone sealant for sealing a solar cell module. The single-component oxime-removed silicone sealant is composed of the following components in parts by weight: 100 parts of alpha, omega-dihydroxyl polydimethylsiloxane having the viscosity in the range from 20000 to 80000, 1-6 parts of polyisobutene resin, 10-40 parts of active calcium carbonate, 1-15 parts of methylsilicone oil, 10-50 parts of fire retardant, 1-5 parts of titanium dioxide, 1-7 parts of fumed silica, 9-15 parts of cross-linking agent, 2-5 parts of silane coupling agent and 0.5-1.5 parts of catalyst. The invention also discloses a preparation method of the sealant. The sealant provided by the invention has the characteristics of excellent weather fastness, yellowing resistance, flame resistance, low water vapor transmittance, good storage stability and the like.

The invention discloses novel polyurethane semi-matte white finish for woodware protection. The finish is prepared by mixing the following components: stearic acid modified alkyd resin, polyketone resin solution, an antifoaming agent, an anti-settling agent, a dispersing agent, white slurry, handfeel wax powder, aerosol extinction powder, 20 percent hydroxyl modified vinyl acetate (VAGH) resin, a leveling agent, an anti-yellowing auxiliary agent, a deodorant and butyl ester. A film prepared from the novel polyurethane semi-matte white finish has the advantages of fullness, moderate hardness, high flexibility, high water resistance, yellowing resistance and environmental protection; and the semi-matte white finish has high comprehensive performance.

In order to solve the problem of environmental pollution of the conventional coating, the invention provides a novel nano sterilizing anionic double-component aqueous wood finishing paint and a preparation method thereof. The nano sterilizing anionic double-component aqueous wood finishing paint provided by the invention comprises a component A and a component B, wherein the component A comprises the following components in part by weight: 65 to 90 parts of acrylic resin, 0.2 to 0.4 part of antifoaming agent, 0.4 to 0.6 part of composite nano anionic powder, 0.1 to 0.3 part of dispersant, 0.5 to 1.5 parts of thickening agent and 15 to 25 parts of water; and the component B comprises the following component in part by weight: 40 to 60 parts of water-dispersed polyisocyanate, wherein the weight of the component A is 1.5 to 2.5 times that of the component B. The nano sterilizing anionic double-component aqueous wood finishing paint has the technical advantages of environmental protection, strong sterilization and mildew prevention, capability of constantly releasing anions and purification and indoor air.

The invention relates to ultra-gasoline resistant aqueous varnish and a preparation method thereof. The aqueous varnish comprises a component A resin paint and a component B curing agent in a weight ratio of 3: 1, wherein the component A resin paint comprises 45-65 parts of aqueous hydroxyl acrylic emulsions, 15-30 parts of aqueous hydroxyl polyurethane dispersions, 0.2-0.5 part of a defoaming agent, 0.2-1.0 part of a wetting leveling agent, 0.2-0.6 part of an aqueous drier, 0.1-0.3 part of a bactericide, 1-3 parts of light stabilizers and 5-15 parts of solvents A; and the component B curing agent comprises 55-75 parts of curing agents and 10-30 parts of solvents B. Compared with the prior art, the preparation method is simple, raw materials are widely selected, and the prepared aqueous varnish has excellent chemical resistance, especially gasoline resistance, effectively improves surface drying speed and activation period, has good interlayer adhesion, and has the advantages of fast hardness establishment, high fullness and the like.

The invention belongs to the technical field of materials, and particularly relates to a high-transparency polyether type double-mirror TPU (thermoplastic polyurethane) thin film and a preparation method for the same. The TPU thin film is prepared from the following components in parts by weight: 100 parts of TPU resin, 0.1 to 0.8 part of antioxidant, 0.1 to 1.8 part of light stabilizer and 0.01 to 0.05 part of processing lubricant. The preparation method comprises the following steps: adding each component into a stirring machine for uniform mixing according to the using amounts in the formula, then pumping the components into a dehumidification dryer for drying, and then performing extrusion casting, mirror counter-compression, cooling, shearing and compression winding to obtain a high-transparency polyether thin film product. The process difficulties of poor transparency, plasticization non-uniformity, high fisheye formation rate and high roller sticking rate are overcome, the productivity is improved, and the high-transparency polyether type double-mirror TPU thin film prepared by the invention has the characteristics of uniform thickness, high transparency, high surface glossiness, yellowing resistance and the like.

The invention relates to an acrylic acid mixed powder coating, which is characterized in that the formula comprises the following components in pbw (part by weight): 25 to 40 portions of epoxy resin, 25 to 40 portions of acrylic acid resin, 0.5 to 2 portions of leveling agent, 30 to 35 portions of filler, 0.1 to 0.2 portion of system catalyst, and 0.1 to 2 portions of other additive. The acrylic acid mixed powder coating has the advantages of lower costs, simple preparation and production, no need for curing agent, better hardness, excellent chemical and pollution resistance, long outdoor endurance, and broad application prospects.

The invention particularly relates to a VAc/St/BA (vinyl acetate-styrene-butyl acrylate) stone paint emulsion and a preparation method. The emulsion comprises components as follows: 18-23 parts of styrene, 26-30 parts of vinyl acetate, 28-32 parts of butyl acrylate, 14-21 parts of alkyl methacrylate, 1.8-2.7 parts of alkyl acrylate, 2-6 parts of a functional monomer, 2-6 parts of a cross-linking agent, 0.3-1.5 parts of an initiator, 3-7 parts of a mixed emulsifier and 100-140 parts of deionized water. The VAc/St/BA stone paint emulsion has the benefits as follows: the yellowing-resistant effect of the styrene-acrylic emulsion can be improved effectively by the aid of the excellent yellowing resistance of vinyl acetate, and the emulsion has the characteristics of low cost, good water resistance, good paint film hardness, good yellowing resistance, good water white resistance and stable performance.

The invention discloses an epoxy resin composition for luminous characters, which consists of the following components in percentage by weight: 20-80% of epoxy resin, 10-40% of a curing agent, 5-10% of an accelerant, 4-10% of a diluent and 0-0.5% of an antifoaming agent, and most preferably 60% of epoxy resin, 24% of a curing agent, 8% of an accelerant, 7.8% of a diluent and 0.2% of an antifoaming agent. The epoxy resin composition disclosed by the invention has short normal-temperature curing time that the epoxy resin composition can be cured in 6-8 hours, can improve the working efficiency, and has the advantages of good surface effect, good luminous effect, excellent yellowing resistance and long-term luminous effect.

The invention relates to a high abrasion-resistant UV (ultraviolet) white primer for electrostatic spraying. The high abrasion-resistant UV white primer is prepared from the following raw materials in parts by weight: 40 to 70 parts of epoxy acrylic resin, 15 to 35 parts of hydroxy acrylic resin, 10 to 20 parts of thermoplastic acrylic resin, 15 to 30 parts of tripropylene glycol diacrylate, 5 to 25 parts of modified graphene, 2 to 6 parts of nanometer silicon dioxide, 1 to 5 parts of nanometer titanium dioxide, 1 to 5 parts of heavy calcium carbonate, 5 to 15 parts of montmorillonite, 10 to 20 parts of white pigment, 2 to 5 parts of zinc stearate, 2 to 6 parts of carboxymethyl cellulose sodium, 1 to 5 parts of polyamide wax, 0.5 to 2 parts of flatting agent, 0.1 to 0.5 part of defoaming agent, 2 to 6 parts of photoinitiator, and 5 to 15 parts of organic solvent. The high abrasion-resistant UV white primer for electrostatic spraying has the advantage that at the premise of ensuring the good electrostatic spraying effect, the anti-sagging property of the primer and the abrasion-resistant property of the primer film are greatly improved.