42results about How to "Less prone to yellowing" patented technology

The invention provides an LED mold pressing packaging process. The process comprises the steps of placing an LED support which is subjected to press welding in a metal gauze packing (MGP) mold; 2), injecting a silica gel mixture of liquid silica gel and fluorescent powder into a rotating cylinder of the MGP mold; 3), clamping the MGP mold; and 4), performing rotation by using a rotating rod from bottom to top, squeezing the silica gel mixture into a mold gel channel, so that the silica gel mixture enters into a cavity of the MGP mold along the gel channel, and subjecting the silica gel to curing and shaping through certain mold clamping pressure and a certain temperature. The LED mold pressing packaging process is achieved through the MGP mold, the silica gel mixture is cured and shaped, the LED packaging is completed, compared with a process that epoxy glue is used for sealing, the process has the advantages that the silica gel is used for sealing, the reliability of the LED packaging can be improved, and the service life of an LED is prolonged. The invention also provides an LED component, and the component is produced through the LED mold pressing packaging process.

The invention belongs to the technical field of powder paint, particularly relates to a compound curing agent used for polyester-type powder paint, and further discloses a production method and application of the compound curing agent used for the polyester-type powder paint. The compound curing agent used for the polyester-type powder paint is mainly produced by using trimesic acid,tris(2,3-epoxypropy)ester and diglycidyl terephthalate as main raw materials and selectively adding 1,2,4-benzenetricarboxylic acid,tris(2,3-epoxypropy)ester, hydroxy polyester resin, bicyclopentadiene dioxide and/or crystalline epoxy resin for mixing reaction. The compound curing agent used for the polyester-type powder paint has a good curing effect, the mechanical performance of a produced coating is stable,and meanwhile, the coating has good boiling-resistant performance; and when the compound curing agent used for the polyester-type powder paint and polyester resin are cured, the performance of a product of the compound curing agent used for the polyester-type powder paint and the polyester resin totally reaches curing effects of current TGIC and HAA curing agents, and the compound curing agent used for the polyester-type powder paint and an existing TGIC or HAA product can be mixed for use, so that the comprehensive performance is more excellent.

The invention discloses a multi-paint composition system of low temperature rapidly cured powdery paints, a coating method thereof, and a coating. The system comprises a prime coating powdery paint for the prime coating of a basic material and a top coating powdery paint for the top coating of the basic material. The prime coating powdery paint comprises prime coating epoxy resin with an epoxy equivalent of 400 to 700. The top coating powdery paint comprises high acid value polyester resin with an acid value not lower than 50 and one or more top coating epoxy resins with an epoxy equivalent of400 to 800. The raw materials are picked, the design of the coating structure is innovative, the stable storage performance of the powdery paint and the excellent protective performance of the coating can be maintained, low temperature rapid curing with a lower curing temperature and shorter curing time can be realized, the system is especially for coating a thermal sensitive basic material suchas MDF, and the coating has an excellent surface resistance performance.

The invention relates to a non-alkali interior wall 2-in-1 dry powder paint, which relates to an interior wall paint of an interior wall decoration material. The non-alkali interior wall 2-in-1 dry powder paint is prepared by heavy calcium carbonate powder, bentonite, polyvinyl alcohol powder, hydroxypropyl methyl cellulose and inorganic or organic pigment. The non-alkali interior wall 2-in-1 dry powder paint has the characteristics of simple making technology, low transportation cost, low raw material price, high bonding strength, no various chemical auxiliary agents in a traditional emulsion paint, no smell with volatility and irritation. The wall surface shaved by the dry powder paint has no yellowing discolouration phenomenon easily, and the phenomena of yellowing discolouration and floating are not easily generated while constructing on the old wall surface. The dry powder paint is taken as a putty surface, other emulsion paints or wallpapers can be added, thereby the floating condition of the emulsion paint or wallpaper are not generated easily, the dry powder paint belongs to green environmental protection wall surface decoration. The 2-in-1 dry powder paint can be widely used for decorating the new wall surface and old wall surface, and can be widely used in high-grade club houses, hotels, restaurants, conference centers, families and the like.

The invention discloses a preparation method and application of main chain embedded terminal amino silicon oil with a side chain containing a tertiary amino group. The preparation method comprises thestep: with a side tertiary amino group-containing secondary amine end-capping linear comb-shaped epoxy polyamine compound and end epoxy (polyether) silicone oil as raw materials and an organic solvent as a reaction medium, performing an aminolysis ring-opening reaction of the epoxy group to prepare the main chain embedded terminal amino silicon oil with the side chain containing the tertiary amino group. Then a novel embedded terminal amino silicon oil softening agent for fabric softening and finishing is obtained by adjusting the pH to 5 to 6 with glacial acetic acid, and adding an environment-friendly emulsifier for mechanical emulsification. Compared with the existing main chain embedded terminal amino silicon oil softening agent, the novel embedded terminal amino silicon oil softeningagent has more excellent hand feeling.

The invention discloses a hydrophilic softening agent and a preparing method thereof. The hydrophilic softening agent contains 70%-90% of quaternary softening agent active matter, and 10%-30% of anhydrous low-carbon solvent with low boiling point or anhydrous water-soluble solvent with high boiling point. The softening agent is free from phosphorus and the harmful substances of alkylphenol ethoxylates, formaldehyde and the like, can be biologically degraded, has the soft, hydrophilic and anti-static functions, and is used for the after treatment of cellulose fiber and the softening arrangement of papermaking, leather and the like.

The invention discloses a graphene regenerated EVA (ethylene-vinyl acetate) forming sole colloidal particle and a preparation method thereof. The colloidal particle is prepared from, by weight, 22-28parts of ethylene-vinyl acetate copolymers, 45-50 parts of ethylene-vinyl acetate copolymer scrap grinding powder, 13-17 parts of oxidic polyethylene, 4-7 parts of graphene, 1-2 parts of carboxylatedgraphene, 2-4 parts of antioxidants, 1.5-3 parts of light stabilizers and 3-5 parts of zinc stearate. According to the graphene regenerated EVA forming sole colloidal particle, raw materials are carefully selected, a formula is reasonable, the graphene regenerated EVA forming sole colloidal particle serves as an EVA forming sole material, the colloidal particle has the advantages of high tensile strength, tearing strength and rebound rate, good bending resistance and rebound resilience, low size shrinkage rate and the like, the performances of the forming sole colloidal particle is close to even superior to those of marketing EVA sole materials, the EVA is recycled, the utilization rate of the EVA is increased, costs of raw materials are reduced, and the colloidal particle is more environmentally friendly.

The invention relates to a catalyst for catalyzing esterification reaction and a synthesis method thereof. The catalyst comprises a polar solvent, a plurality of carriers and a plurality of metal coordination polymers. These carriers are dispersed in a polar solvent and include a hydroxide of a metal, an oxide of a metal, a chloride of a metal, a nitride of a metal, a sulfide of a metal, an oxideof silicon, or a combination thereof. These metal coordination polymers include titanate hydrolysates, aluminate hydrolysates, zirconate hydrolysates, or combinations thereof. Some metal coordinationpolymers are attached to the carriers to form a plurality of microparticles having an average particle size in the range of 10 nm to 1 [mu]m. Other metal coordination polymers are dispersed in a polarsolvent. The catalyst is good in dispersity and has a good catalytic effect. Moreover, the polyester obtained by catalyzing the esterification reaction by utilizing the catalyst has good brightness and chroma, and the yellowing problem and the yarn breaking problem are not easy to occur.

The invention relates to the technical field of printing, and in particular to a process for preparing printed matter with a gravure fission effect. The process for preparing the printed matter with the gravure fission effect comprises the following steps that step A, UV fission ink is printed on a carrier material through a gravure plate; and step B, the carrier material printed with the UV fission ink is sequentially subjected to UV detonation treatment and UV drying and curing treatment to obtain the printed matter with the gravure fission effect. The process for preparing the printed matter with the gravure fission effect is simple to operate, easy to control and high in production efficiency, the printed matter is enabled to have the obvious gravure fission effect, and the cured ink has relatively good adhesion on the carrier material, the phenomena of edge rising, warping and the like are not prone to occurring, relatively good weather resistance and aging resistance are achieved, the phenomenon of yellowing or fading is not prone to occurring, the quality is stable, and the process for preparing printed matter with the gravure fission effect can be used for mass production

The invention discloses a waterborne wood paint with high weather resistance and a production method of the waterborne wood paint. The waterborne wood paint with high weather resistance comprises thefollowing raw materials in parts by weight: 30-40 parts of waterborne acrylic resin, 15-25 parts of waterborne polyurethane resin, 0.3-0.7 part of defoaming agent, 0.2-1 part of substrate wetting agent, 2-5 parts of dipropylene glycol monobutyl ether, 2-4 parts of dipropylene glycol methyl ether, 1-3 parts of 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate, 0.5-1 part of kathon mildewcide, 0.3-0.6part of wetting agent, 1-2 parts of water repellent, 1-3 parts of waterproof agent, 1-3 parts of dry film mildewcide, 0.1-0.5 part of polysiloxane, 0.2-0.5 part of flatting agent, 0.3-0.8 part of hindered amine light stabilizer, 0.5-1 part of ultraviolet light absorber, 0.2-0.5 part of polyurethane tackifier, 0.3-0.8 part of acrylic tackifier and 10-20 parts of deionized water.

The invention discloses a white photosensitive film, and a preparation method and application thereof. The white photosensitive film comprises a white inorganic filler, alkali-soluble resin, light-cured resin, a photoinitiator, heat-cured resin, a curing agent and an antioxidant; and the curing agent is an anhydride curing agent. A white photosensitive film formula is used to form a coating liquid, a carrier film is coated with the coating liquid, and the carrier film is heated and baked to obtain the white photosensitive film. According to the white photosensitive film, the formula is improved, and by adding the anhydride curing agent and the alkali-soluble resin with the side chain and/or the tail end containing a carboxyl group, the prepared white photosensitive cover film can meet therequirements of an existing product in the aspects of development precision, high temperature resistance and the like; and the cured film is low in b value and high in reflectivity.

The invention discloses waterborne polyurethane antiseptic paint for yellowing-and-ageing resistant vine artware. The waterborne polyurethane antiseptic paint comprises, by weight, 10-15 parts of nano-cellulose suspensions with the solid content of 10-12%, 0.5-1 part of nano zinc oxide, 0.3-0.5 part of guar gum, 0.5-1 part of hydroxyl silicone oil, 40-50 parts of waterborne polyurethane resin, 0.1-0.15 part of nonylphenol polyoxyethylene ether, 0.5-1 part of octenyl succinic anhydride, 4-6 parts of absolute ethyl alcohol, 0.05-0.1 part of benzotriazole, 0.5-1 part of Kathon aseptic and 0.3-0.5 part of sodium salicylate. The waterborne polyurethane antiseptic paint has the advantages of good antiseptic performance, high tenacity, good combination performance with vine fibers, less proneness to cracking and shedding, high ultraviolet and ageing resistance, less proneness to yellowing and high appearance quality.

The invention discloses a varnished wire, a manufacturing method of the varnished wire, a compressor comprising the varnished wire and a refrigeration device. The varnished wire comprises wire bodies, a polyamide-imide insulation varnish layer and a self-lubricating insulation layer, wherein the polyamide-imide insulation varnish layer is formed on the outer surfaces of the wire bodies, and the self-lubricating insulation layer is formed on the outer surface of the polyamide-imide insulation varnish layer. The varnished wire has the remarkable oil resistance and the remarkable refrigerant resistance, the foaming temperature can be remarkably raised, and the varnished wire is suitable for the compressor, in particular to an R32 refrigerant compressor.

The present application relates to a preparation method of a secondary aminosilane coupling agent, which comprises, under an inert atmosphere, performing a Michael addition reaction on a pre-treated allyl-terminated polyether and a primary aminosilane coupling agent to obtain the described Secondary aminosilane coupling agent; the pretreatment method of the allyl polyether is: add 0.05-5% antioxidant to the allyl polyether, under the protection of inert gas and at 60-100°C Reaction at a temperature of 0.5-3h, and then under the pressure of -0.085 to -0.095MPa and vacuum dehydration at a temperature of 90-120°C for 0.5-2h, and then lower the temperature to 40-60°C. The present application also relates to the secondary aminosilane coupling agent prepared by the above method, the isocyanate-based polyether polymer modified by it, the polyurethane polymer modified by it and its preparation method. The preparation method of the invention is simple, and the process of capping and modifying the polyurethane prepolymer by the prepared secondary aminosilane is easy to control without gel phenomenon.

The invention discloses a rubber plug for a puncture-type infusion connecting member heparin cap and belongs to the technical field of medical instruments. The rubber plug comprises, by weight, 100 parts of isoprene rubber, 3-5 parts of transparent zinc oxide, 1-3 parts of stearic acid, 1-1.3 parts of sulfur, 0.1-0.4 part of promoter TRA, 0.1-0.3 part of promoter TMTM and 5-8 parts of lightweight magnesium carbonate. The rubber plug has the advantages of stable physiochemical and biological performance, excellent compatibility with medicine, resistance to perforation, good closing performance after puncture and capability of meeting clinical using needs.