30results about How to "Strong anti-yellowing" 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.

The invention provides a high-temperature resistant sealant for inverted COBs (chip on board) and belongs to the technical field of LED package sealants. The high-temperature resistant sealant comprises a component A and a component B which are equal in mass, wherein the component A comprises, by weight, 90-110 parts of vinyl silicone oil, 0.1-0.5 part of platinum group catalysts, 1-5 parts of a thickening agent and 0.1-2 parts of a heat resistant agent; the component B comprises, by weight, 50-80 parts of MQ-type vinyl silicone resin, 30-60 parts of a crosslinking agent and 0.01-0.05 part ofan inhibitor. The high-temperature resistant sealant is good in performance and cannot crack even under the high temperature of 280DEG C for a long term, and meanwhile, good light transmittance is sustained.

The invention discloses a special substrate sealing agent for dyed veneers. The special substrate sealing agent comprises a main agent, a curing agent and a diluent. The main agent is composed of thefollowing raw materials in parts by weight: 50-70 parts of acrylic resin, 1 to 3 parts of methyl isobutyl ketone, 5 to 12 parts of butyl acetate, 0.1 to 1 part of a titanate coupling agent, 1-2 partsof barium sulfate, 0.1 to 0.5 part of a wetting agent, 0.3 to 1 part of a leveling agent, 0.3 to 1 part of an antifoaming agent, 2-4 parts of a light stabilizer, 0.4 to 1 part of a drier, 7 to 10 parts of butyl acetate and 15 to 20 parts of ethyl acetate. The curing agent is composed of the following raw materials in parts by weight: 60-70 parts of butyl acetate and 30 to 40 parts of an HDI tripolymer. The diluent is composed of the following raw materials in parts by weight: 40-50 parts of butyl acetate and 50-60 parts of propylene glycol methyl ether acetate. The special substrate sealing agent for the dyed veneers has extremely strong sealing property on grease in wood, and can effectively prevent the grease of the dyed veneers from seeping out.

The invention discloses a yellowing-resistant heat-dissipation paint which is prepared from the following raw materials in parts by weight: 94-100 parts of polypropylene, 1-2 parts of triglycol diisooctoate, 0.2-0.4 part of sodium molybdate, 5-7 parts of dibutyl maleate, 3-4 parts of oyster shell powder, 1-2 parts of dimethyl methyl phosphonate, 8-12 parts of calcined kaolin, 2-4 parts of polyethyleneglycol 1000, 2-3 parts of precipitated silica white, 1-2 parts of tetrabutylammonium bromide, 1-2 parts of propanediol phenyl ether and 8-10 parts of modified assistant. The heat-dissipation paint has the advantages of high adhesive force, favorable surface leveling property, no shrinkage void, high yellowing resistance and excellent comprehensive properties.

The invention relates to a production technology of special color master batch titanium dioxide for automobile plastics. The technology comprises the steps of mineral separation, crushing, acidolysis, settlement, press filtration, titanium solution concentration, hydrolysis, water washing, bleaching, rinsing, salt treatment, diaphragm press filtration, calcining and crushing, wherein the As content is controlled below 5ppm in the mineral separation step; and in the salt treatment step, 0.5% of K2CO3 and 0.15% of H3PO4 are added to guarantee the specific surface area of the obtained titanium dioxide (by TiO2) being 8-15m<2> / g. The special color master batch titanium dioxide for automobile plastics, produced through adopting the above technical scheme, has the advantages of high whiteness, good dispersibility, strong hiding power, low processing torque and excellent anti-yellowing capability.

The invention belongs to the technical field of textiles, and particularly relates to organic cotton denim with a knitted fabric effect and a preparation method thereof. Cloth is manufactured through a knitting machine, then the cloth is processed into yarn through conventional procedures, and finished mercerized yarn is prepared through the procedures of knitting, acid-base composite cracking, dyeing, softening, dewatering and drying, calendaring, resin setting, preshrinking and the like. The organic cotton denim produced by the method is full in color and good in dyeing effect, and meets the requirements of market consumers for pursuing fashion and beauty. According to the invention, the acid-base composite cracking process for gray cloth is added before the dyeing process, so that impurities and heavy metal ions on the pure cotton gray cloth can be effectively removed, a high-quality pretreatment fabric is provided for subsequent dyeing, the softness is improved, and the fabric is more comfortable to touch; and the fabric is dyed by combination with a roller, so that the fabric is uniformly dyed and is not easy to fade.

The invention discloses a PVDC waterborne emulsion used for coating. The PVDC waterborne emulsion is prepared from the following components by weight: 1 to 5 parts of a seed monomer, 45 to 55 parts ofa VDC monomer, 4 to 10 parts of a comonomer, 0.01 to 0.05 part of an initiator, 0.1 to 0.5 part of a seed emulsifier, 0.5 to 3 parts of an emulsifier, 0.01 to 0.05 part of an auxiliary agent, 0.001 to 0.01 part of a modifying auxiliary agent and 35 to 40 parts of deionized water. The PVDC waterborne emulsion provided by the invention is coated onto hard sheets of PVC, PET, nylon, PCT and the liketo form composite hard sheets, and has the advantages of high impact strength, small possibility of crack generation, good barrier properties, no dissolution of harmful substances, capability of directly contacting with chemicals, high thermal stability, strong yellowing resistance, etc.

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.

The invention discloses a special substrate sealer for stained veneer, which comprises a main agent, a curing agent and a diluent. The main agent is composed of the following raw materials in parts by weight: acrylic resin: 50-70 parts; methyl isobutyl Ketone: 1-3 parts; Butyl acetate: 5-12 parts; Titanate coupling agent: 0.1-1 part; Barium sulfate: 1-2 parts; Wetting agent: 0.1-0.5 parts; Leveling agent: 0.3 ~1 part; defoamer: 0.3~1 part; light stabilizer: 2~4 parts; drier: 0.4~1 part; butyl acetate: 7~10 parts; ethyl acetate: 15~20 parts; The curing agent is composed of the following raw materials in parts by weight: butyl acetate: 60-70 parts; HDI trimer: 30-40 parts; the thinner is composed of raw materials in the following parts by weight: butyl acetate: 40-40 parts 50 parts: Propylene Glycol Methyl Ether Acetate: 50-60 parts, the special substrate sealant for dyed veneer has a strong sealing ability to the oil in wood, and can effectively prevent the oil of dyed veneer from seeping out.

The invention relates to a preparation method of aqueous emulsion type neoprene antioxidant system product, which belongs to the field of adhesive technology. The invention chooses p-cresol and dicyclopentadiene butyl reactant as the main antioxidant to coordinate with the composite termination agent made from phenothiazine and N,N-dialkyl hydroxylamine compound to produce a functional antioxidant. With the adoption of the suspension producing process and powder grinding and emulsifying equipment, the functional antioxidant is further produced into an aqueous emulsion type neoprene antioxidant system product. Adding 0.75-1.89% of aqueous emulsion type neoprene antioxidant system product provided by the invention in the process of preparing a neoprene product sample, the appearance and color,mooney viscosity, peeling strength, viscosity performance indexes of the solution are relatively stable in a hot air aging test under the temperature of 70 DEG C.

The invention discloses a highly weather-resistant architectural exterior coating, which comprises A component and B component, and the A component includes the following raw materials by weight percentage: polyester resin 10% to 30%; silane coupling agent 0.1-2%; catalyst 0.01-0.1%; carbon black 0.05-2%; titanium dioxide 15-25%; dispersant 0.5-5%; leveling agent 0.01-0.05%; 30-70%; the B component is an isocyanate curing agent. The invention has the following beneficial effects: 1. The coating is suitable for metal surfaces (such as aluminum); 2. The coating has good weather resistance, strong adhesion, no pulverization, non-combustibility, water resistance, strong UV resistance, strong Anti-yellowing, strong hiding power.

The invention discloses a fluorine-containing thiophene derivative 3‑(N‑trifluoroacetylamino)thiophene, a synthesis method and an application thereof. Described 3-(N-trifluoroacetylamino)thiophene is shown in formula 1, and the preparation method is: dissolving 3-aminothiophene oxalate in dichloromethane, and under the action of triethylamine, obtains the free state 3‑aminothiophene, then cool the reaction solution to 0°C, slowly add trifluoroacetic anhydride dropwise, react at room temperature for 8-10 hours, add saturated sodium bicarbonate solution until no bubbles are generated, and obtain a reaction mixture that is separated and purified to obtain 3‑(N‑trifluoroacetylamino)thiophene; the amount of the 3‑aminothiophene oxalate, triethylamine and trifluoroacetic anhydride is 1:1~5:1~3. The 3-(N-trifluoroacetylamino)thiophene of the present invention is applied to the preparation of composite emulsions.

The invention provides a high-temperature resistant sealant for inverted COBs (chip on board) and belongs to the technical field of LED package sealants. The high-temperature resistant sealant comprises a component A and a component B which are equal in mass, wherein the component A comprises, by weight, 90-110 parts of vinyl silicone oil, 0.1-0.5 part of platinum group catalysts, 1-5 parts of a thickening agent and 0.1-2 parts of a heat resistant agent; the component B comprises, by weight, 50-80 parts of MQ-type vinyl silicone resin, 30-60 parts of a crosslinking agent and 0.01-0.05 part ofan inhibitor. The high-temperature resistant sealant is good in performance and cannot crack even under the high temperature of 280DEG C for a long term, and meanwhile, good light transmittance is sustained.

The invention discloses a thiophene derivative (E2SBFE2) as shown in formula 1, 2,7-bis(2,2',3,3'-tetrahydro-5,5'-dithieno[3,4- b][1,4]dioxane)-9,9'-spirobifluorene and its synthesis method and its application as a polymer emulsion additive; E2SBFE2 can be used as an additive to compound with PVDC emulsion to prepare composite emulsion E2SBFE2@PVDC , the composite emulsion is especially suitable for coating on PVC and other hard sheets to make composite hard sheets, and has the advantage of strong anti-yellowing ability;

The invention discloses a preparation method for coating PVDC (polyvinyl dichloride) waterborne emulsion. The method includes the steps: (1) preparing reaction raw materials; (2) preparing initiator water solution; (3) preparing premixed liquid; (4) polymerizing seed emulsion; (5) polymerizing PVDC emulsion; (6) desorbing the emulsion. Hard pieces such as PVC (polyvinyl chloride), PET (polyethylene terephthalate), nylon and PCT (polycaprolactam) are coated with the PVDC waterborne emulsion prepared by the method to prepare composite hard pieces, and the composite hard pieces have the advantages that the composite hard pieces are high impact strength and heat stability, good in barrier property and high in yellow-resistant ability, do not easily generate cracks, cannot dissolve out harmfulsubstances and can directly contact with drugs and the like.

The invention provides a silicone composition for encapsulating purple light LEDs, which includes components A and B in equal mass; the component A includes the following raw materials in parts by mass: 90-110 parts of phenylvinyl silicone resin, platinum 0.1-0.5 parts of catalyst, 1-5 parts of tackifier, 0.5-2 parts of antioxidant; the B component includes the following raw materials in parts by mass: 50-80 parts of phenyl vinyl silicone resin, 30 parts of crosslinking agent ~60 parts, inhibitor 0.01~0.1 part, ultraviolet absorber 0.5~3 parts. The invention belongs to the technical field of LED encapsulation adhesives. The organic silicon composition for encapsulating purple LEDs provided by the invention has excellent ultraviolet resistance and aging resistance, can reduce light attenuation of purple LEDs, and prolong service life.

The invention discloses a thiophene derivative (E2SBFE2) as shown in a formula 1, 2,7-bis(2,2',3,3'-tetrahydro-5,5'-dithieno[3,4-b][1,4]dioxene)-9,9'-spirobifluorene, a synthetic method of the thiophene derivative and application of the thiophene derivative as a polymer emulsion additive. The E2SBFE2 can be used as an additive to be compounded with a PVDC emulsion to prepare a composite emulsion E2SBFE2-coated PVDC, and the composite emulsion is particularly suitable for being smeared on hard sheets such as PVC and the like to prepare composite hard sheets and has the advantage of high yellowing resistance.

The invention relates to an anti-yellowing treatment process of environment-friendly rubber filling oil and belongs to the technical field of rubber filling oil. The anti-yellowing treatment process is characterized by comprising process steps as follows: 1) to-be-treated rubber filling oil is added to an extraction kettle and subjected to extraction separation with an oxidation-extraction mixed fluid, the fluid flow of an oxidation solution is 1 mL / h-20 mL / h, the fluid flow of an extraction solution is 40 mL / h-100 mL / h, the extraction temperature is 175-195 DEG C, the initial pressure of extraction is 1.5 MPa-2.0 MPa, and the stirring rate is 100-300 rpm; the mixed fluid with the extraction solution dissolved is distilled, and the mixed fluid with rubber filling oil and an extracting agent dissolved is left to stand for layering separation. The decoloration refinement method has higher decoloration capacity than existing common solvent refinement or adsorption refinement method, the recovery rate of a target product is higher than 98%, and the anti-yellowing performance of the rubber filling oil subjected to decoloration refinement is higher.