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201results about How to "Solve discoloration" patented technology

Low-cost concrete antifreezing pumping aid and preparation method thereof

The invention relates to the concrete pumping aid field, in particular to a low-cost concrete antifreezing pumping aid and a preparation method thereof. The concrete pumping aid comprises the following raw materials by weight percent: 20-30% of polycarboxylic acid water reducing agent of which solid content is 40%, 0.3-0.4% of air entraining agent, 0.9-2% of retarder, 11-15% of sulfonated acetone-formaldehyde condensate of which solid content is 36%, 6-10% of sodium lignin sulfonate, 2-4% of antifreezing component and the balance of water. The preparation method comprises the following steps: adding water, air entraining agent, polycarboxylic acid water reducing agent and sulfonated acetone-formaldehyde condensate in a container to heat to 45-55 DEG C, and stirring evenly; adding sodium lignin sulfonate in the container to stir, centrifuging to remove precipitate; and adding retarder and antifreezing component to stir evenly. The low-cost concrete antifreezing pumping aid has good performance; the composite indicators such as the antifreezing property, the pumping property, the water reducing ratio and the ratio of compressive strength are better than that of the antifreezing pumping aid which uses polycarboxylic acid water reducing agent or sulfonated acetone-formaldehyde condensate alone; and the antifreezing pumping aid in the invention has higher adaptability and good cost performance.
Owner:安徽海螺材料科技股份有限公司

Method for preparing zinc molybdate ultrafine anti-bacterial powder by adopting molten-salt growth method

The invention relates to a method for preparing zinc molybdate ultrafine anti-bacterial powder by adopting a molten-salt growth method. The method comprises the following steps that: sodium molybdate and zinc nitrate serving as raw materials and sodium nitrate serving as a salt material are mixed in a mortar in the proportion of 1:1:8-18; a proper amount of absolute alcohol is added in the mortar to grind for 1 to 2 hours to ensure that the raw materials and the salt material are mixed sufficiently and uniformly; the mixture is dried for 2 to 4 hours at 90 DEG C in a crucible, and is melted and calcined for 3 to 7 hours in an electric furnace at the temperature of between 320 and 360 DEG C; and the calcined curing product is sufficiently soaked and washed with distilled water, is filtered and dried to remove residual fused salt to obtain the ultrafine zinc molybdate powder. Researches prove that the ultrafine zinc molybdate anti-bacterial powder prepared by the molten-salt growth method has bacteria resistance superior to the anti-bacterial powder synthesized by a chemical precipitation method under the same testing condition, and avoids the problems of high cost and color change by using a silver antibacterial agent. The method can be widely applied in the fields of plastics, ceramics, paints and the like.
Owner:NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY

Antibacterial ink for ceramic ink-jet printing and ceramic tile with antibacterial function

The invention provides antibacterial ink for ceramic ink-jet printing and a ceramic tile with an antibacterial function. The antibacterial ink for the ceramic ink-jet printing comprises solvents and antibacterial agents which are uniformly dispersed in the solvents; the solvents are water solutions which are formed by 1, 2-propanediol and 1, 2-ethanediol; the antibacterial agents are formed by calcium phosphate and inorganic salt containing one or more antibacterial ions of silver, copper and zinc ions; the mass fraction of the calcium phosphate in the antibacterial agents is of 8 % to 20 % and the abundant is the soluble inorganic salt containing one or more antibacterial ions of silver, copper and zinc ions. The antibacterial ink can be used to printing the ceramic tile with the antibacterial function. Compared with the prior art, the antibacterial ink for the ceramic ink-jet printing has the advantages of enabling functions of the existing ink for the ceramic ink-jet printing to be enriched, enabling the ceramic pile which is produced by utilizing the antibacterial ink to have the antibacterial function, being high in whiteness, solving a color changing problem due to the fact that metal ions which are served as the antibacterial agents are restored or oxidized and being long in antibacterial effect.
Owner:FOSHAN DONGPENG CERAMIC +3

Preparation methods of amino triazine derivative macromolecular char forming agent and polypropylene flame retardant

The invention relates to preparation methods for an amino triazine derivative macromolecular char forming agent and a polypropylene flame retardant. Cyanuric chloride and a solvent are added into a reaction kettle, and alkylamine-containing mixed amine and an acid-binding agent are added dropwise to generate a unitary substituendum; diamine and the acid-binding agent are added dropwise at room temperature to generate a binary substituendum; the amino triazine derivative macromolecular char forming agent is obtained by subsequent treatment, the flame retardant is prepared from the char forming agent, and the flame retardant is high in compatibility in a PP (propene polymer). The preparation methods have the advantages that hydramine is replaced or partially replaced with alkylamine, so that the compatibility of the triazine char forming agent and the PP is improved, and the problem of difficult separation of the triazine char forming agent is solved; with adoption of the non-acetone solvent, the problem of discoloration of the triazine carbonizing agent is solved; the amino triazine derivative macromolecular char forming agent and the polypropylene flame retardant are widely applied to the flame-retardant fields of automobiles, household appliances, building materials and the like.
Owner:GUANGZHOU UNIVERSITY +1

White leather tanning agent and production method thereof

The invention discloses a chromium-free tanning agent in the tanning industry and a synthetic production process thereof; the formula (weight ratio) comprises: 60-150 parts of amide containing hydroxymethyl, 30-100 parts of aliphatic aldehydes, and 1-5 parts of anti-yellowing agent. The production method comprises the following steps: in the first step, 60-150 parts of amide containing hydroxymethyl are added into a reaction kettle with a stirring function, a thermometer, a reflux condenser and a vacuum distillation unit; in the second step, temperature is raised to 30 to 40 DEG C; in the third step, 30-100 parts of aliphatic aldehydes are dripped; in the fourth step, 1-5 parts of anti-yellowing agent are added with 2-4 hours of heat insulation; and in the fifth step, decompression distillation is carried out for 4-6h at the temperature of 50-90 DEG C and the pressure of -0.3bar-0.95bar for removing the water. The third step and the fourth step can be exchanged. The invention solves the color changing problem in the production and storage processes of the products, adds a small amount of anti-yellowing material alkali metal and the borate solution of alkaline earth metal, greatly improves the storage conditions of the 'oxazolidine' type tanning agent, and prolongs the quality guaranteeing time; as the anti-yellowing material has low price, is easy for acquisition, and has small adding amount, the invention does not affect the application characteristics of the products and can be widely promoted.
Owner:德瑞(常州)特种材料有限公司

Special primer-topcoat polyurea protection coating for automobile chassis system and preparation method

The invention discloses a special primer-topcoat polyurea protection coating for an automobile chassis system and a preparation method. The coating is prepared from a component A and a component B in a volume ratio of 1:(2-4), wherein the component A comprises isocyanate, a poly-sulfide modified epoxy resin and a diluent; the component B comprises an aliphatic synthetic hindered amine polyurea resin, a coloring pigment, a filler, graphene pulp, organic zinc, a dispersing agent, an ultraviolet absorbent, an ultraviolet light stabilizer, an anti-settling agent, a leveling agent, a defoaming agent, extinction powder and a dissolvent. The invention further discloses a preparation method of the special primer-topcoat polyurea protection coating for the automobile chassis system. The thickness of a disposable coating membrane is greater than or equal to 80mu m, a coating membrane is rapid in drying speed and high in construction efficiency, a coated layer is good in adhesion to a substrate, good in impact resistance, free of color change in long-term outdoor exposure, very good in aging resistance, salt mist resistance and medium resistance, high in product solid content and good in environmental friendliness, and the method provided by the invention is simple in process, low in cost and applicable to industrial production.
Owner:湘江涂料科技有限公司

Niclosamide ethanolamine salt wettable powder as well as preparation method and application thereof

The invention provides niclosamide ethanolamine salt wettable powder as well as a preparation method and application thereof. The wettable powder is prepared from niclosamide ethanolamine salt, a dispersing and wetting agent, a suspension aid and an anti-caking agent, wherein the dispersing and wetting agent is a compound mixture of fatty alcohol-polyoxyethylene ether and a non-ionic hydroxyl polyethylene oxide block copolymer, and the use amount of the dispersing and wetting agent accounts for 8-15% of the total weight of the raw materials. By using the compound mixture of the fatty alcohol-polyoxyethylene ether and the non-ionic hydroxyl polyethylene oxide block copolymer as the dispersing and wetting agent, a unique steric hindrance effect is provided in the system, so that the stability of the system is effectively kept and the problems of slow wetting, color change and flocculation are solved; the wettable powder is short in wetting time, uniform in dispersion effect, relatively small in particle size distribution, capable of rapidly reaching a target site, free from flocculation for a long time and free from particle aggregation, so that the wettable powder has long-lasting efficacy and applicable to hard water. The wettable powder disclosed by the invention is applicable to the preparation of molluscicidal products and is good in molluscicidal effect.
Owner:JIANGSU ESSENCE AGROCHEM

Preparation method of fibers with antibacterial, odor-resisting and far infrared functions

The invention relates to the technical field of spinning and weaving, and in particular relates to a preparation method of fibers with antibacterial, odor-resisting and far infrared functions. The method comprises the following steps: preparing an antibacterial agent and mixing the antibacterial agent with a chemical fiber matrix slice; melting and extruding to prepare antibacterial master batches; melting the antibacterial master batches and chemical fibers and spinning to produce the fibers with the antibacterial, odor-resisting and far infrared functions. The antibacterial fibers provided by the invention have the advantages of stable process and very good spinnability, and have the odor-resisting and far infrared functions; an antibacterial rate on escherichia coli, staphylococcus aureus and candida albicans is greater than or equal to 99 percent; the fibers have an excellent water washing resisting property, and the antibacterial rate is still greater than 99 percent after being washed for 50 times; the fibers have no irritation on skin; a preparation process is pollution-free, and technologies are not increased; the cost is reduced, and the economic benefits are good.
Owner:ZHEJIANG SHIKANGNENG NEW MATERIAL SCI & TECH CO LTD

Method for preparing yellow peach cans

The invention discloses a method for preparing yellow peach cans, and belongs to the technical field of can food processing. The method includes the following steps that by weight, 45-60 parts of fresh yellow peaches are cleanly washed, peeled, subjected to kernel removing, diced, soaked with a color retention agent for 12-18 min and cleanly washed with fresh water; B, 2-6 parts of honeysuckles, 1-3 parts of hawthorns and 1-3 parts of shaddock peels are taken, deionized water with the weight 8-10 times the weight of the mixture is added into the mixture, the obtained mixture is boiled and then continuously boiled for 25-40 min, filtering is carried out, and filter liquor is taken; C, 5-12 parts of a sugar mixture and 65-75 parts of water are added into a sauce pan, boiled and then cooled to the normal temperature; D, the yellow peaches pre-boiled in the step A and 2-6 parts of the plant extracting solution prepared in the step B are added into the sweet water obtained in the step C, and the mixture is stirred to be even and then loaded into disinfected tins; E, sealing and sterilizing are carried out. The yellow peach cans have the advantages of being crisp and tasty in mouthfeel and moderate in sourness and sweetness, and having the certain health caring effect.
Owner:SICHUAN HUIQUAN CANNED FOOD
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