41results about How to "No yellowing phenomenon" patented technology

The invention relates to polyurethane resin, which consists of the following components in weight percentage: 4 to 5 percent of polyethylene glycol adipate, 11 to 13 percent of polytetrahydrofuran glycol, 0.4 to 0.6 percent of ethylene glycol, 1.8 to 1.9 percent of isophorone diamine, 6 to 8 percent of isophorone diisocyanate, 0.08 to 0.1 percent of antioxidant and 73 to 80 percent of organic solvent. The polyurethane resin is applied to produce instep leather of top-grade travel shoes and has good ultraviolet ray yellow stain resistant performance; and under the sunlight, the leather color can be kept unchanged for a long time, and no yellow stain occurs; meanwhile, the polyurethane resin also has good anti freezing property, and no crack generates when the polyurethane resin is used at low temperature for a long time.

The invention discloses a PC (Polycarbonate) material with an excellent transparent light diffusion function and a preparation method thereof. The PC material is composed of polycarbonate, flame retardant masterbatch, an auxiliary flame retardant, a compound light diffuser, an antioxidant, a flame retardant synergist, a lubricant and other auxiliaries. The principle ingredient of the PC material is PC resin; the PC material is extruded by two steps, wherein the first step is to blend a sulfonate type major flame retardant and an organic silicon flame retardant with the PC resin by melting and granulate the mixture through extrusion by virtue of a twin-screw extruder so as to obtain the light diffusible flame retardant masterbatch, and the second step is to add the compound light diffuser, the flame retardant masterbatch, the antioxidant, the flame retardant synergist, the lubricant and other auxiliaries for further melting blending by taking PC as the major ingredient, and then extrude and granulate the mixture. The flame-retardant light diffusible PC material provided by the invention can be widely applied to an LED (Light-Emitting Diode) lamp, the backlight of a liquid crystal display, a transmission type screen, a decorative lighting billboard, an advertisement lamp box and the like in the lighting field.

A special binder for reflecting material and its production are disclosed. It is characterized by taking polyester polylol, solvent, isocyanate, coupler, catalyst and antiager as raw materials to prepare A component, taking isocyanate, low-molecular polylol and solvent as raw materials to prepare B component, and mixing A with B to obtain the binder. It achieves low cost, simple process, excellent binding and ageing-resistant performances.

The invention provides waterborne polyurethane three-protection paint for circuit board anticorrosion. The waterborne polyurethane three-protection paint for the circuit board anticorrosion comprisesthe following preparing raw materials in parts by weight: 20-60 parts of waterborne polyurethane resin, 40-80 parts of deionized water, 0.1-15 parts of a drying auxiliary agent, 0.1-10 parts of a stabilizing agent, 0.1-10 parts of an auxiliary leveling agent, 0.1-10 parts of a defoaming agent, 0.3-5 parts of a sterilizing agent, 0.3-4 parts of a flatting agent, 0.3-2 parts of a fluorescent agent,0.3-2 parts of an anti-yellowing agent and 0.1-3 parts of other auxiliary agents.

The invention relates to the technical field of cables, in particular to an anti-termite cable material. The anti-termite cable material is characterized by being manufactured with, by weight, 40 parts of ethylene-tetrafluoroethylene copolymer, 40 parts of propene-tetrafluoroethylene copolymer, 18 parts of glass fiber, 4 parts of magnesium hydroxide, 4 parts of mica powder, 4 parts of carbon black or titanium dioxide, 3 parts of bifenthrin and 5 parts of methylbenzene. The invention further discloses a manufacturing method and a cable and an optical cable using the material. The cable material has the main advantages of being outstanding in anti-termite and mouseproof performance, excellent in ultraviolet radiation aging resisting performance, high in electrical insulating property, more fireproof and higher in mechanical strength, and resisting heat, corrosion, steam, oil and flame more; the cable material is easy to manufacture, the production speed is higher when the cable material is used for producing cables, and the thickness can be controlled more accurately.

The invention provides a single-component titanate halogen-free flame-retardant organic silicone sealant. The organic silicone sealant is mainly prepared from, by weight, 0-50 (not including 0) parts of polydimethylsiloxane with the end capped with trimethoxy silane, 50-100 parts of polydimethylsilane with the end capped with methyl dimethoxy silica, 0.1-6 parts of catalyst, 1-6 parts of cross-linking agent, 30-60 parts of halogen-free flame-retardant filler, 5-20 parts of polydimethicone, 5-15 parts of gas phase method silicon dioxide and 0.1-3 parts of tackifier. The organic silicone sealant has excellent adhesive properties, yellowing resistance and storage stability, can be cured quickly, has good flame retardance with the flame-retardant rating reaching UL94-V0 and also has the advantage of being free of pollution during production; the shear strength is larger than or equal to 3.5 Mpa, and when the organic silicone sealant is stored at the temperature of 25 DEG C or below, the product guarantee period can be as long as 13 months; the organic silicone sealant can be widely applied to bonding of components of electronic and electric devices.

A method for preparing a PET-based heat-absorbing film. The heat-absorbing film includes a polymer film and a modified PET film that are closely bonded by thermal compression. The specific steps of the preparation method are as follows: (1) modification of the PET film; (2) ) Preparation of polymer film (a) Add polyvinyl alcohol solution, maleic anhydride and initiator to the reaction kettle, add styrene, tackifier and near-infrared absorber after dissolving, stir and react in nitrogen atmosphere to obtain film preparation solution , and dry to obtain the film preparation material; (b) dissolve the film preparation material in the casting film solution to form a coating solution, apply the coating solution on the substrate and dry to form a polymer film; use a polymer film layer to replace the traditional The adhesive base layer improves the temperature resistance and weather resistance of the polymer film layer, has good thermal stability and flexibility, and can maintain a high adhesive force at a higher temperature without falling off; in the polymer film preparation material The near-infrared absorber is added to make the polymer film have the functions of heat preservation, heat insulation and ultraviolet protection, which enriches the functions of the polymer film.

The invention relates to a single-component RTV (room temperature vulcanization) silicone sealing material for an LED lamp and a preparation method of the single-component RTV silicone sealing material. The single-component RTV silicone sealing material comprises raw materials in parts by weight as follows: 100 parts of alpha, omega-bis(trimethoxysilyloxy) polydimethylsiloxane, 100-120 parts of reinforcing filler, 1-10 parts of a plasticizer, 3-7 parts of a cross-linking agent, 1-3 parts of a catalyst and 1-5 parts of an adhesion promoter. The single-component RTV silicone sealing material for the LED lamp has excellent adhesive property, high temperature and low temperature resistance, high temperature and high humidity resistance, yellowing resistance, low volatile matter content and no sulfur and halogen, and can provide a better adhesion solution for LED lamp assembly such as adhesive fixation of a PC (polycarbonate) bulb and a lamp holder and adhesive fixation of an LED light bar and a lamp tube.