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

The invention discloses terylene afterprocessing oil agent for preventing xanthochromia, which is mainly formed by smoothing agent, emulsifying agent, cleaning agent and addition agent, and is characterized in that weight percentage of each component is smoothing agent 85%-90%, emulsifying agent 5%-10%, cleaning agent 2%-4% and addition agent 1%-1.5%. According to the weight percentage of each component, the method for preparation is that firstly packing emulsifying agent and cleaning agent with precise measure into an autoclave to heat from 50 DEG C to 80 DEG C, secondly packing smoothing agent into the autoclave to mix for 40-60 min, thirdly charging addition agent to mix homogeneously, and then cooling, filtering and packaging. The terylene after-processing oil agent for preventing xanthochromia has the advantages that interfacial force is low, permeability and diffusibility are good, the applying oil process is quick and homogeneous, the volume for applying oil is easy to be controlled, after-processing is smooth and has no imperfect effect on weave process and causticity component, and the invention is easy for washing and not influence on coloration and topical finish, and is good in cohesion property and forming of silk can, high in oil film strength, and strong in ability of preventing xanthochromia, thereby being favorable to store silks.

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 relates to quaternary ammonium modified block polyether / amino silicone oil and a preparation method thereof. The preparation method comprises the following steps: bis(glycidoxy-terminal), DMC and an organic solvent, adding an alkaline catalyst, heating to 80-110 DEG C, and balancing for 6-8 h; heating to about 140 DEG C to decompose the catalyst for 1-2 h, and carrying out underpressure distillation to obtain colorless or flavescent epoxy-terminated silicone oil; uniformly mixing the epoxy-terminated silicone oil, polyetheramine and a solvent, reacting at 60-80 DEG C for 15-20 h to prepare a block polyether / amino silicone oil prepolymer; and respectively adding a tertiary amine compound and equimolar quantity of organic acid into the product obtained in the step b, continuously reacting at 70-80 DEG C for 4-8h so as to obtain the final product. The amino silicon oil prepared by the method has excellent hand feeling, has little influence on whiteness and hydrophilicity of fabrics, can completely replace common amino silicon oil, and has an excellent application prospect.

The invention discloses a preparation method of a rosin ester, and comprises the following steps: (1) feeding the rosin ester in a reactor, warming to 170-180 DEG C under the protection of inert gas to melt the rosin; (2) adding unsaturated acid which is 0.5-8% of the rosin weight at 130-200 DEG C, and reacting for 0.5-2 hours; (3) adding a homemade composite reduced-color reagent which is 0.01-1% of the rosin weight and alcohol which is 11-18% of the rosin weight at 180-230 DEG C, reacting for 2-8 hours at 180-285 DEG C, adding saturated acid, and then reacting for 2 hours, removing water produced in reaction in a vacuum mode, cooling to 180-240 DEG C, adding a stabilizer which is 0.1-0.6% of the rosin weight to obtain the rosin ester. The preparation method disclosed by the invention is simple in process and low in cost, and the rosin ester with light color, good weather resistance, good yellowing resistance and good temperature tolerance can be prepared.

The invention relates to a transparent dealcoholized single-component RTV silicone rubber sealant and a preparation method thereof. The preparation method comprises the following steps: stirring 100 parts by mass of alpha, omega-dihydroxyl polydimethylsiloxane, 3 to 10 parts by mass of dimethicone, 5 to 10 parts by mass of a reinforcing filling material and 1 to 5 parts by mass of a hydroxyl radical scavenger under vacuum in a power mixer; then adding 0.3 to 2 parts of a coupling agent and carrying out stirring under vacuum; and adding 1 to 10 parts of a cross-linking agent and 0.1 to 3 parts of a catalyst and carrying out stirring under vacuum and packaging so as to obtain a finished product. The sealant provided by the invention has the advantages of yellowing resistance, a fast curing speed, no toxicity, environment friendliness, etc.

The invention discloses a special halogen-free flame retardant reinforced PA (polyamide) 56 composite material for a casing of a low-voltage circuit breaker. The composite material comprises components in parts by mass as follows: 35-70 parts of PA 56, 20-40 parts of alkali-free glass fiber, 0.1-1.2 parts of a glass fiber dispersing agent, 6-20 parts of halogen-free flame retardant, 12-30 parts of modified filler, 0.3-0.9 parts of an antioxidant, 0.2-0.6 parts of a lubricant and 0.5-1.2 parts of a coupling agent. The composite material can have excellent flame retardance and burning resistance, and can meet the low-voltage circuit breaker industry requirement that the material is contacted with a glow wire for 30 s at the temperature of 960 DEG C and a flame is extinguished within 10 s after the material is separated.

The invention discloses a method for synthesizing modified epoxy acrylate. The method comprises the steps of: A, adding 18-22 parts by weight of reactive diluent, 20-30 parts by weight of anhydride, 0.1-0.3 part by weight of inhibitor, 0.1-0.2 part by weight of catalyst and 0.2-0.4 part by weight of antioxidant into a synthesizer; B, cooling the mixture obtained in the step A to 100 plus or minus 2 DEG C, adding 30-40 parts by weight of epoxy resin, 0.1-0.3 part by weight of catalyst, 0.1-0.3 part by weight of inhibitor and 0.1-0.2 part by weight of antioxidant, heating the mixture to 105 plus or minus 2 DEG C and carrying out heat insulation for 2 plus or minus 0.5 hours, then heating to 110-115 DEG C and carrying out heat insulation for 2 plus or minus 0.5 hours until AV is not larger than 10; and C, cooling the mixture which is obtained in the step B to below 95 DEG C, then adding 15-25 parts by weight of non-benzene activated monomer, uniformly stirring the mixture and cooling to 80 plus or minus 2 DEG C. The product which is obtained by the method has good performance and high environmental friendliness..

The invention discloses a light diffuser board integrated with high transmittance, high haze and high toughness in one body. A fiber-level GPPS such as transparent and blue-background polystyrene is taken as a main material, glass beads are taken as a silicon diffusion agent, and a high haze flexibilizer SCBS is innovatively added. Based on the diffuser board having functions of light collection, light diffusion and light reflection, a product formula is improved and added, auxiliary agents such as a diffusion agent, a light stabilizing agent and a high haze flexibilizer are added to a raw material, and thereby functions of light refraction, light reflection and light diffusion are realized in products, not only can quite high light diffusion and emergent light uniformity be realized, but also a utilization rate of the power source is high, anti-folding performance and shielding performance are good, a penetration rate of products can reach 93%+ / -5%, and the haze can reach 99%+ / -1%.

The invention discloses a double-hindered phenol structure-contained hydrazides compound for a light stabilizer and a preparation method thereof. The double-hindered phenol structure-contained hydrazides compound has a double-hindered phenol and double-hydrazide structure, thus, the molecular weight is increased, and the migration resistance and thermal oxidation resistance capacity is strong. The preparation method comprises the following steps: performing addition reaction on hindered phenols and alpha, beta-acrylic ester under the action of a catalyst to obtain an addition product, wherein the molar ratio of the hindered phenols to the alpha, beta-acrylic ester is 1.0:(0.6-1.8), and the catalyst is alkali metal, an alkali metal hydroxide, an alkali metal hydride or an alkali metal alcoholate; then, performing carbonyl nucleophilic substitution reaction on the addition product and a hydrazine hydrate in an organic solvent A to obtain a hydrazides substitution product, wherein the molar ratio of the addition product to the hydrazine hydrate is 1.0:(0.8-5.0); performing the reaction between a diisocyanate compound and the hydrazides substitution product at the temperature of 0-10 DEG C; and carrying out recrystallization to obtain a goal product. By adopting the preparation method disclosed by the invention, the operation is simple, the raw materials are available, and the cost is low.

The invention discloses a high-anti-yellowing silicon rubber compound which is characterized by comprising the following raw materials by weight: 100 parts of raw silicon rubber, 1-20 parts of hydroxy silicone oil, 20-70 parts of white carbon black, 0.1-3 parts of zinc stearate used as an inner release agent, 1-10 parts of hydrogen-containing silicone oil and 0.01-0.5 part of pyrophosphoric acid used as an anti-yellowing assistant. The invention also discloses a preparation method of the high-anti-yellowing silicon rubber compound. The high-anti-yellowing silicon rubber compound and the preparation method have the advantages that on the basis of not reducing the physical and mechanical properties of the silicon rubber compound, the high-anti-yellowing silicon rubber compound is good in anti-yellowing capability, good in processability and good in physical and mechanical properties.

The invention relates to a cationic binder emulsion for denim paint dyeing. The binder emulsion is generated after a reaction of soft monomers, hard monomers, cationic monomers, crosslinking monomers, a compound emulsifier and an initiator. During preparation, a mixture of all the monomers and an initiator water solution are added into the emulsifier and distilled water for a reaction, cooling and filtering are conducted, and the cationic binder is prepared. The cationic binder is used for the denim yarn / fabric paint dyeing process or the paint overdyeing process, and during use, it is not needed to pretreat yarn / fabric or paint.

The invention discloses a normal-temperature bi-component or multi-component curing system and an application thereof. The normal-temperature bi-component or multi-component curing system comprises the following components in parts by weight: (A) 10-90 parts of acrylic-based resin, (B) 0-30 parts of acrylic ester with the degree of functionality more than or equal to 2, (C) 0-2 parts of polymerization inhibitors, (D) 0-85 parts of fillers, (E) 0.005-10 parts of organic acid and / or organic acid salt, (F) 0-4 parts of sulfur alcohol, (G) 0.05-3 parts of tertiary amine, (H) 0-10 parts of addition agents, (I) 0.1-6 parts of curing agents and (J) 1-15 parts of dispersing agents. The normal-temperature bi-component or multi-component curing system disclosed by the invention is good in yellowing resistance, high in curing velocity and short in curing time and can be conveniently used at the normal temperature or even in winter.

The invention discloses a low carbon wallpaper paint which comprises the following components in parts by weight: a component A, a component B and a component C, wherein the component A comprises 0.2-0.3 part of thickening agent, 4-7 parts of dispersing agent, 0.1-0.3 part of defoaming agent, 1.5-2.5 parts of film-forming agent, 0.1-0.2 part of sterilizing agent, 0.1-0.2 part of wetting agent, 1-2 parts of solvent and 15-20 parts of water; the component B comprises 4-7 parts of powder, 10-15 parts of titanium white, 2-5 parts of kaoline and 4-7 parts of silica micropowder; the component C comprises 40-60 parts of emulsion, 0.1-0.2 part of deforming agent, 0.2-0.4 part of film-forming agent and 0.1-0.2 part of non-silicone organic ester deforming agent. The low carbon wallpaper paint reaches the international environmental-protection standard, can effectively make up the wall thin cracks, and has excellent scrubbing resisting property, yellowing resisting property and long service life.