39results about How to "Appearance colorless and transparent" patented technology

The invention relates to a preparation method of an anti-aging silicone material for LED packaging, and belongs to the technical field of silicone products. Polyurethane is adopted to modify siliconerubber so as to obtain a raw material, and through combination with vinyl-terminated methylsilicone oil and a platinum catalyst, a rubber matrix is obtained through hydrosilylation; and the hydrogen-containing methylsilicone oil is adopted as a cross-linking agent, and vulcanization is performed so as to obtain the LED packaging anti-aging silicone material. The anti-aging silicone material has agood refractive index, aging resistance and good mechanical properties, and polyurethane has the advantages of high hardness, high strength, high elasticity, high wear resistance, tear resistance, aging resistance, ozone resistance, radiation resistance, good electrical conductivity and the like, and silicone rubber has excellent heat resistance, cold resistance, dielectric properties, ozone resistance, atmosphere aging resistance and other properties, so that after the silicone rubber is modified by using polyurethane, the tensile strength and tear strength of the modified silicone rubber areimproved, and the aging resistance is also improved.

The invention relates to a preparation method of polyether polyol for all-water blown polyurethane foam capable of resisting high temperature of 220 DEG C, and belongs to the technical field of polyether polyol synthesis. The preparation method is as follows: carrying out ring-opening reaction by taking a compound initiator and epoxy propane as main raw materials, wherein the compound initiator is a mixture of pentaerythritol, trimethylolpropane and methyl o-phenylenediamine; neutralizing a polymerization product by phosphoric acid, adsorbing by a compound silicate adsorbent, dehydrating, filtering, adding a compound efficient antioxidant, and uniformly mixing to obtain polyether polyol for the all-water blown polyurethane foam capable of resisting high temperature of 220 DEG C. The polyether polyol has extremely good high-temperature resistance, has lower viscosity at the same time, and can be independently used as a main polyether for being applied to a high-temperature-resistant all-water blown polyurethane rigid foam system; the obtained foam is resistant to a high temperature of 220 DEG C, and can be completely used for thermal-insulation heat-insulation construction of high-temperature pipelines such as an overheated vapor pipeline and a hot oil pipeline.

The invention relates to the field of preparation of rubber and in particular relates to a preparation method of crude liquid fluorosilicone rubber by means of room temperature vulcanization. The preparation method is characterized by comprising steps that siloxane mixture and blocking agent are added into a polymerization reactor together; tetramethyl ammonium hydroxide alkoxide is added as catalyst for polymerization reaction; after the polymerization reaction is finished, purified water is added to crack the materials to obtain low-viscosity oily substance; temperature is rose to break the enzyme of the alkoxide; and finally the low molecules in the material are removed under vacuum condition to get crude liquid fluorinated silicone rubber. The invention solves the problem that the viscosity of the crude liquid hydroxyl-blocked fluorosilicone rubber with medium viscosity is difficult to control; the viscosity range of the crude liquid fluorosilicone rubber is narrow, ranging from 6,000cs to 10,000cs; the crude liquid fluorosilicone rubber has stable content of vinyl; and the volatile matter of the crude rubber is lower than 1%.

The invention relates to transparent high-hardness yellowing-resistant epoxy stone face glue and a preparation process thereof. The transparent high-hardness yellowing-resistant epoxy stone face glueis characterized by being prepared from glue A and glue B, wherein the glue A is prepared from epoxy resin 128, epoxy resin 127, epoxy resin 170, phenylcarbinol, an epoxy active diluent 622, an organic silane coupling agent 550, an anti-foaming agent 6020, a leveling agent BYK-306 and an anti-ultraviolet agent L-9522; the glue B is a modified amine curing agent; the glue A and the glue B are uniformly mixed according to the mass ratio of (2 to 4):1; de-foaming is performed in vacuum; then, the glue is scraped onto a stone panel; curing is firstly performed for 30min at the room temperature; then, curing is continuously performed at 60 DEG C for 1h; next, the material is taken out; after the cooling, the shore hardness of an obtained cured object is 88 or higher; the grinding performance isgood; the adhesion force reaches grade 1; the yellowing resistant performance is good; no obvious yellowing occurs after the sunlight irradiation for 1 year; the glue A does not crystallize. The rawmaterials in a formula can be easily obtained; the cost is low; the performance is excellent; the face glue is suitable for large-scale popularized use.

The invention discloses a disinfectant fluid used for washing CT units. The disinfectant fluid contains the following components by weight percent: 0.5-1.0% of quinoline, 2.0-5.0% of hydrogen peroxide, 0.1-0.5% of peroxyacetic acid, 0.5-1.5% of trichloroisocyanuric acid, 2.0-8.0% of ethanol, 3.0-6.0% of benzalkonium chloride and the balance of water. The disinfectant fluid has the beneficial effects that the production cost of the disinfectant fluid is low; the preparation process is simple; the process conditions are easy to achieve; the product stability is good.

The invention discloses a solution for sterilizing and cleaning a hemodialysis machine and a preparation method of the solution. The solution is prepared from peroxyacetic acid, hydrogen peroxide, water, glacial acetic acid and sodium pyrophosphate. The preparation method comprises the following steps: putting water, glacial acetic acid and sodium pyrophosphate into a solution preparing tank to prepare an inert solution; stirring for dissolving for 30 minutes; adding peroxyacetic acid and hydrogen peroxide in the solution preparing tank to obtain a mixed solution; and filtering the mixed solution through a three-section type membrane filter and performing filling to obtain the product. The product has stable performance and a validity period lasting for two years long, and is capable of effectively exterminating intestinal tract pathogenic bacteria, pyogenic cocci, pathogenic yeasts and bacterial spores.

The invention relates to a cool white tea and a method for preparing the same. The cool white tea uses finished product tea leaves, edible, colorless and ethanol-containing liquid and purified drinking water as raw materials; and the finished product tea leaves are dealkalized, decolored, dealcoholized, freezed, purified and extracted to prepare the cool white tea. The cool white tea contains no additional ingredient with flavor except the raw materials; and the tea is colorless and transparent in appearance and has the characteristics of intense fragrance, rich nutrition and sweet mouthfeel. The cool white tea contains no theine, is suitable for the old, hypertensive patients, coronary patients and people which are unsuitable for beverage containing the theine and has nutritious and health-care functions on human body.

The invention provides a method for treating aromatic compound nitrification wastewater, which comprises the following steps of: removing aromatic compounds in water in an adsorption mode after acid regulation, and separating sulfate radicals and nitrate radicals in a mode of adding divalent metal salt to realize recovery of the sulfate radicals and the nitrate radicals in the nitrification wastewater. Secondary pollution such as iron mud is avoided in the process, the influence on the quality of byproduct salt is reduced, the treatment effect is stable and reliable, the operation cost is low, and operation and industrial implementation are easy.

The invention relates to a high-efficiency catalyst used for preparing a high ring 107 glue and a preparation method thereof. The preparation method of the catalyst comprises the following steps of: adding a catalyst A and a catalyst B in a mole ratio of 0.25-1.1 according to weight ratio into a reaction bottle with a stirrer, a thermometer sleeve, a nitrogen inserted tube and a condensation pipe; and reacting the mixture in a nitrogen atmosphere with stirring to obtain the catalyst, wherein the catalyst component A is prepared by reacting octamethylcyclotetrasiloxane and potassium hydroxide,and the catalyst component B is prepared by reacting octamethylcyclotetrasiloxane and tetramethylammonium hydroxide. In the method, a polysiloxane high-boiling point ring is adopted; the polysiloxanehigh-boiling point ring belongs to by-products of high rings; the problem of accumulation of the by-products of an organic silicon monomer factory is solved; the production cost of the 107 glue is reduced; the profit space is expanded; and the core competition ability of an enterprise is enhanced. The catalyst has high stability; the storage period of the catalyst is more than 180 days; metamorphism phenomena, such as lamination, solidification and the like, are difficult to cause; and the high-efficiency catalyst has a plurality of low-boiling point cyclic utilization times.

The invention discloses transparent antirust coating and a preparation method thereof and relates to the technical field of container coating. The transparent antirust coating is composed of 75% of 6009 epoxy resin solution, 15% of light colour resin, 1% of a releasing agent, 5% of a flexibilizing agent and 4% of a mixed solvent. The preparation method of the transparent antirust coating comprises the following steps: firstly preparing solid 6009 epoxy resin through synthesis by virtue of 128 epoxy resin, bisphenol A and a catalyst, then adding the mixed solvent for preparing the 6009 epoxy resin solution, then reacting the light colour resin with the releasing agent to generate modified epoxy resin, and finally adding the flexibilizing agent and the mixed solvent into the modified epoxy resin, so that the target coating is obtained. The transparent antirust coating has the advantages that corrosivity is strong after film formation, appearance is colourless and transparent, all the technical indexes meet food hygienic standard, and safety is high; meanwhile, a production technology is simple, and economical efficiency is high.

The invention discloses preserved egg gel ointment and a preparation method thereof. The preserved egg gel ointment consists of preserved egg enzymatic hydrolysate and a gel substrate, wherein the mass ratio of the preserved egg enzymatic hydrolysate to the gel substrate is 1: (15-19); the solid content of the preserved egg enzymatic hydrolysate is 12%-20%; and the gel substrate is prepared from the following components in parts by mass of 0.4 to 0.6 part of carbomer 980, 0.1 to 0.5 part of carbomer U20, 50 to 80 parts of water, 0.1 to 0.5 part of allantoin, 0.2 to 0.5 part of dipotassium glyphosate, 0.5 to 1 part of beta-glucan, 0.1 to 0.5 part of EDTA (Ethylene Diamine Tetraacetic Acid) disodium, 0.02 to 0.04 part of borneol, 1 to 3 parts of propylene glycol, 0.06 to 0.1 part of propylparaben, 0.04 to 0.08 part of phenoxyethanol, 6 to 8 parts of 1, 3-butanediol, 2 to 3 parts of glycerol, 0.3 to 0.5 part of triethanolamine, and 0.04 to 0.08 part of hydrogenated castor oil through mixing. The preserved egg enzymatic hydrolysate is used as an active component, is rich in micromolecular anti-inflammatory peptide, and is compounded with glycerol, propylene glycol and the like to prepare the ointment which has the effects of diminishing inflammation, preserving moisture and removing itching.

The invention discloses a preparation method of dibenzylamine, which comprises the following steps: vacuumizing a reaction kettle until the reaction kettle is completely dewatered, then conveying liquid ammonia into the reaction kettle, heating, adding benzyl chloride into the reaction kettle, and reacting to obtain dibenzylamine; and after the reaction is finished, separating excessive liquid ammonia, adding liquid caustic soda into the reaction kettle for replacement reaction, separating out ammonia gas generated after replacement, separating liquid from the remaining material, and carryingout rectification to purify the dibenzylamine. In the invention, the low-cost raw material benzyl chloride is used for production and no catalyst or other solvent is used, so that the production costis greatly reduced, pollution is small, energy conservation and environmental protection are achieved, and the policy requirements of national green chemical engineering are met.