281results about How to "No yellowing" patented technology

The invention discloses non-yellowing thermoplastic polyurethane hot melt adhesive which is calculated by weight percentage; the prescription comprises the following components: 40 to 55 percent of polyester polyol, 30 to 45 percent of polyether polyol, 1 to 4 percent of chain extendor, 12 to 24 percent of aliphatic isocyanates, 0.2 to 2 percent of coupling agent, 0.5 to 4 percent of inorganic nano-sized powder, and 0.02 to 0.05 percent of catalyst which are prepared through bulk polymerization. The invention adopts aliphatic isocyanates as the raw material, thereby fundamentally solving the problem that the polyurethane hot melt adhesive on sale yellows and is aged in a short time; the prepared polyurethane hot melt adhesive does not yellow in 504 hours under the irradiation of an xenon lamp, is particularly applicable in the bonding of products with appearance in light color or in white or with quite high grade, does not contain organic solvent, has no harm to the environment and the human body when in use and belongs to environment-friendly hot melt adhesive; and in addition, the preparation method has the advantages of little equipment investment, simple process, easy operation, stable product quality and the like.

The invention discloses a tile glue, comprising ordinary portland cement, quartz sand, re-dispersible emulsion powder, heavy calcium carbonate, water reducer, cellulose ether and efflorescence inhibitor. By utilizing the technical scheme, since the efflorescence inhibitor is added, there is no yellowing and efforescence phenomenon after construction; and the portion of the re-dispersible emulsionpowder is increased, so that the technical effect of pasting glass onto glass directly can be achieved.

The invention discloses a preparation method of an environment-friendly polypropylene filament yarn oil agent, comprising the following steps of: weighing 40 to 60 parts by weight of fatty alcohol ether phosphate potassium salt, 2 to 8 parts by weight of polysiloxane polyether copolymer, 3 to 12 parts by weight of pentaerythritol oleate, 4 to 10 parts by weight of fatty alcohol polyoxyethylene ether, 2 to 12 parts by weight of ethylene oxide-epoxypropane block polyether, 20 to 45 parts by weight of polyethylene glycol laurate, 10 to 20 parts by weight of butter alcohol amine phosphate salt and 5 to 10 parts by weight of high-carbon heterogeneous alcohol phosphate potassium salt, heating to 40 to 80 DEG C, reacting under the stirring condition, then adding 20 to 40 parts of emulsifying agent EL-40, 1 to 5 parts of methyl-1-hydroxyethyl-2-stearyl imidazoline ammonium methosulfate, 5 to 15 parts of dimethyl silicon oil, 2 to 40 parts of deionized water and 0.001 to 0.02 part of preservative, reacting under the stirring condition at 50 to 70 DEG C, and separating to obtain the environment-friendly polypropylene filament yarn oil agent.

The invention relates to a production method of a formaldehyde-free non-ironing shirt. The production process is as follows: spraying of finishing liquid, drying, stereoscopic molding, shaping of a drying tunnel, and dehumidifying and dampening, wherein the drying temperature is set to be 80 DEG C to 90 DEG C, and the humidity is controlled to be 30-50%; in the stereoscopic molding step, a stereoscopic combined type press process is adopted, the temperature is controlled to be 140 DEG C to 160 DEG C the time is controlled to be 1-2min, and force of 6-10 kg/cm<2> is applied; and in the step of shaping of the drying tunnel, the design of circular blowing and heat insulation as well as a band-type drying tunnel of a ternary-form gradually-heated system are adopted, the shaping temperature of different segments is set to be 110 DEG C to 140 DEG C, 130 DEG C to 160 DEG C and 150 DEG C to180 DEG C, and the total shaping time is 3-6min. The non-ironing shirt produced by the invention is free from formaldehyde and belongs to a real formaldehyde-free non-ironing shirt, the production process flow is short, the process control is simple, the production reproducibility is good, and the product quality is stable.

The invention relates to a chemical fiber and a manufacturing method thereof, in particular to a full-dull daiamid 6 fiber added with titanium dioxide and a manufacturing method thereof. The full-dull daiamid 6 fiber and the manufacturing method thereof which have less polymer degradation, even yarn levelness, less filoplume and uniform dyeing aim at solving the disadvantages of easy degradation of high polymer fusant, poor evenness of the yarn levelness, high fluctuation of oiling rate, easy occurrence of more filoplume, bad uniformity of dyeing, etc. The invention mainly has the technical proposal that daiamid 6 particle with more than or equal to 1.6% of TiO2 is taken as raw material, treated by melt spinning and cross air blasting through twice of rectification and oiling, and is wound; finally, the full-dull daiamid 6 fiber is obtained.

The invention relates to a vinyl acetate-acrylate copolymer emulsion, which is prepared by adopting OP-10, SDBS, SVS, water, acrylic acid and a seed emulsion as the bottom water system, taking VAc, BA and AA as the monomer, employing ammonium persulfate as the oxidant, and using sodium bisulfite as the reducing agent. Specifically, the seed emulsion in the bottom water system is prepared by using SDBS, OP-10, AA, sodium carbonate and water as the base solution, adopting VAc, BA and AA as the monomer, employing SDBS, OP-10, sodium carbonate and water as the pre-emulsification system, taking ammonium persulfate as the oxidant, and adopting sodium bisulfite as the reducing agent. The emulsion provided in the invention has a solid content of 40%-45%, viscosity (in terms of a 4-cup application amount) of 20S-26S, bonding peel strength (N/2.5cm) of 1.4-2.5, a surface tension force of 32-37 dyne, and a film contact angle of 25-29 degrees, thus being particularly suitable for application in dry paper-plastic or plastic-plastic composite adhesives. The preparation method of the vinyl acetate-acrylate copolymer emulsion has the characteristics of mild reaction conditions and safety reaction system, thus being conducive to factory mass production.

An addition curable silicone adhesive composition that can be cured at room temperature, exhibits favorable adhesiveness, and yields a cured product upon curing that exhibits excellent transparency and a suitable degree of hardness. The addition curable silicone adhesive composition of the present invention comprises: (A) a diorganopolysiloxane containing at least two silicon atom-bonded alkenyl groups, (B) a three dimensional organopolysiloxane resin that comprises trifunctional siloxane units and/or tetrafunctional siloxane units represented by SiO_4/2, (C) an organohydrogenpolysiloxane containing at least two silicon atom-bonded hydrogen atoms, (D) a hydrosilylation reaction catalyst, (E) an organosilicon compound as an adhesion-imparting agent, and (F) an acid anhydride that is liquid at room temperature.

The invention provides a non-yellowing ultraviolet light curing abrasion resistant paint and a preparation method thereof, belongs to the technical field of ultraviolet light paints and aims to solve the problem of yellowing in a conventional ultraviolet light abrasion resistant paint caused by that an aromatic ultraviolet light resin with rigid construction is adopted as a matrix resin. The paint is prepared by the following components in parts by weight: 60 to 80 parts of aliphatic urethane acrylate with eighteen degree of functionality, 0.3 to 0.9 part of flatting agent, 0.2 to 0.5 part of wetting agent, 0.2 to 0.6 part of antifoaming agent, 5 to 11 parts of dipentaerythritol pentaacrylate, 2 to 6 parts of glass powder, 1 to 5 parts of ceramic powder, 1 to 3 parts of polyethylene wax, and 1.8 to 4 parts of photoinitiator. The invention further provides the preparation method of the non-yellowing ultraviolet light curing abrasion resistant paint. The hardness of the non-yellowing ultraviolet light curing abrasion resistant paint is 3 to 5H, and the abrasive resistance is 1.1 to 2.5 mg per hundred laps.

A smart window includes a pair of transparent electrodes spaced apart to face each other. Porous aerogel is interposed between the pair of transparent electrodes. Liquid crystal is interposed between the pair of transparent electrodes and filliping pores of the aerogel. The smart window scatters more light because an interface between the aerogel and liquid crystal is maximized by filling pores of the aerogel with the liquid crystal.

The invention belongs to the technical field of compound food additives and in particular discloses a domestic instantly-fermenting bread modifier, which is mainly prepared by uniformly mixing the following raw materials in a certain weight ratio: yeast, emulsifier, sodium bicarbonate, citric acid, alpha-amylase, glucose oxidase, lipoxidase and modified starch. The modifier can be conveniently used without additional yeast and other additives, makes domestic operation more convenient, the skin the steamed bread smooth and the taste of the steamed bread fragrant and sweet, and delays ageing caused by water loss.

A water-soluble composite containing thermoplastic PVA (polyvinyl alcohol) is finely particulate, the particle size is 0.0015-2.0 mm, and the composite is prepared from thermoplastic PVA resin and a linear random polymer in a weight ratio of (80-99.9): (0.1-20). The water-soluble composite containing thermoplastic PVA is characterized in that the melt index is 8-35 g/10 min, the melt temperature is 120-280 DEG C, and the water solution temperature is 20-80 DEG C. The water-soluble composite has lower crystallinity and excellent melt processing fluidity, overcomes defects of high crystallinity and poor melt flowability of existing blended modified PVA resin, and a preparation method is simple and easy to implement.

The invention belongs to the field of building coatings and particularly relates to a functional inorganic mineral wall material. The functional inorganic mineral wall material is prepared from, by mass, 20-40 parts of ground calcium carbonate, 10-20 parts of ash calcium powder, 0-10 parts of washed kaolin, 0-10 parts of metakaolin, 0-10 parts of calcined kaolin, 0-5 parts of calcium bentonite, 5-15 parts of diatomaceous earth, 0-10 parts of zeolites, 10-30 parts of modified gypsum, 0-20 parts of magnesium oxide, 0-10 parts of magnesium sulfate, 0-5 parts of titanium dioxide, 0-5 parts of white cement, 0-5 parts of sepiolite, 0-5 parts of attapulgite, 2-5 parts of talcum powder, 0-5 parts of wollastonite, 0.5-1 part of water-retaining agent and 0-2 parts of nano titanium dioxide photocatalyst.

The invention relates to a profile modification agent for an epoxy resin emulsion, which is used for solving the problem of poor selectivity of the conventional organic resin plugging agent. The profile modification agent for an acrylic monomer grafted epoxy resin emulsion is obtained by polymerizing epoxy resin with an acrylic monomer, neutralizing with N,N-dimethylethanolamine and emulsifying with deionized water, wherein the concentration of the epoxy resin in an emulsion system is 300-600 mg/L, the concentration of the N,N-dimethylethanolamine is 3,000-5,000 mg/L, and the crosslinking ratio is 10:1 or 20:1 or 40:1. When the profile modification agent is in use, a large quantity of gel particles of the emulsion enter large pore canals while a small quantity of or no gel particle enterssmall pore canals, the resistance coefficients of the large pore canals are increased, and the resistance coefficients of the small pore canals are increased at a lower frequency in comparison to thelarge pore canals, so that selective plugging can be realized; and moreover, the profile modification agent has high temperature resistance and high salt resistance, and the emulsion system is stable.

The invention relates to the technical field of high polymer materials, in particular to an anti-yellowing nano-silver antibacterial polycarbonate material and a formed product thereof. The anti-yellowing nano-silver antibacterial polycarbonate material comprises polycarbonate resin, nano-silver antibacterial agents, antioxidants and metal ion passivators, and the formed product is a product generated after the anti-yellowing nano-silver antibacterial polycarbonate material is formed. According to the anti-yellowing nano-silver antibacterial polycarbonate material, the antioxidants, the metalion passivators, the nano-silver antibacterial agents and the polycarbonate resin are blended, so that the polycarbonate resin cannot be yellowed under the processing condition of 300-330 DEG C.

An amine of the formula (I) for use as hardener for epoxy resins, hardeners for epoxy resins containing the amine of the formula (I) and resultant epoxy resin compositions which more particularly can be used as low-emission room-temperature-curing epoxy-resin coatings with high hardness and surface quality. The amine of the formula (I) has little odour and is a very successful diluent for epoxy resin compositions. It is more particularly obtained by reductive alkylation from 1,2-propylenediamine and an aldehyde or ketone.

The invention provides a silane-terminated polyether, which has a structural general formula shown in the description. The invention also provides a preparation method of the silane-terminated polyether, and the preparation method comprises the following steps: adding hydroxyl-terminated polyether into a reaction kettle; vacuumizing at the high temperature of 80-120 DEG C to remove water for 2 hours; adjusting the temperature to 90-150 DEG C, and adding anhydride to prepare carboxyl-terminated polyether; adjusting the temperature to 100-120 DEG C, adding glycidyl ether alkoxy silane and a triphenylphosphine or ammonia catalyst, and continuously reacting; and cooling and discharging to obtain silane-terminated polyether resin. The preparation method provided by the invention is simple and safe in production process, and common, easily available and low in purchasing cost in production raw materials.

The invention belongs to the field of high molecules, and particularly relates to thermal plastic processing available polyvinyl alcohol resin, as well as a preparation method and application thereof. To solve the technical problems, the method comprises the following steps: based on mass percentage, adding 15-45 parts of imidazole ionic liquid into water, sufficiently dissolving and ionizing; then, adding 100 parts of polyvinyl alcohol, uniformly mixing to obtain a mixture, and standing at 65-90 DEG C for plasticizing; and removing moisture. The thermal plastic processing available polyvinyl alcohol resin can be applied to the fields of thermal plastic processing, such as extrusion, injection molding, membrane blowing, spinning, foaming and fused deposition modeling. The preparation method is simple and efficient, has strong operability, and is easy for industrial implementation. Products prepared by adopting the polyvinyl alcohol resin as a raw material has excellent mechanical performance and excellent conductive performance.

The invention discloses a preparation method for closed-type aliphatic-series isocyanate water dispersoid, which aims to solve the technical problems of low cementing or splicing strength existing in the traditional closed-type aliphatic-series isocyanate. The preparation method for the closed-type aliphatic-series isocyanate water dispersoid comprises the following steps: 1. drying polyatomic alcohol; 2. adding the polyatomic alcohol and dimethylolpropionic acid into compound solvent, stirring, introducing nitrogen, and keeping warm for 15-45 minutes after heating; 3. dripping aliphatic-series isocyanate; 4. adding blocking agent; 5. adding triethylamine, then adding deionized water, emulsifying, and stopping introducing the nitrogen; and 6. removing the compound solvent. The closed-typehexamethylene diisocyanate (HDI) water dispersoid prepared with the preparation method can be used for high-grade cementing and finishing fields, such as wood lacquers, leather finishing agent, aqueous adhesive and the like, also can serve as the crosslinking curing agent and the accessory ingredient for film forming resin and is applied to the fields, such as enamelled wires, paper treating agent and the like.