46results about How to "Large molecular size" patented technology

The invention discloses a preparation method of a silicon-acrylic emulsion capable of being used for preparing a polymer cement-based waterproof coating. The method comprises the following steps: by adopting an emulsion polymerization method, taking a vinyl monomer, a vinyl-containing functional organic silicon monomer and the like as comonomers, dropwise adding an initiator by virtue of a polymerizable emulsifier and mechanical stirring to enable the monomers to be polymerized and nucleated in water, continuously dropwise adding the initiator and the residual monomers to carry out double-bond free radical polymerization, finally carrying out ice-water bath quenching reaction, and adjusting the pH value to obtain the silicon-acrylic emulsion with the core-shell structure. According to the polymer cement-based waterproof coating prepared from the silicon-acrylic emulsion, the water resistance and the mechanical property of the waterproof coating can be remarkably improved, in addition, due to the fact that silicon-oxygen bonds on a molecular structure are neatly arranged towards the outer layer, the coating has excellent hydrophobicity and air and moisture permeability, and the problems of bulging and falling during construction on a wet base plane are solved.

The invention discloses a photoacid generator with a diphenyl sulfonium structure and a synthesis method of the photoacid generator, and relates to the field of photoresists, the photoacid generator has the following structure shown in the description, wherein A is C1-C5 fluoroalkane, and B is a naphthenic base of C3-C10. The photoacid generator disclosed by the invention can control acid diffusion, reduce line width roughness, prevent pattern damage and form photoetching patterns with uniform sizes, and has high transparency under a 193nm light source.

Provided are preparation and application of a refined decolorizing agent and cleaning for edible oil. Composite available chlorine gas is obtained through a chlorate aqueous solution under the condition of taking inorganic acid or organic acid as an oxidation reductant, a secondary chemical reaction is conducted for adsorption through stabilizer carrier hydroxide and a silicon compound, and a granular composite finished product of the refined decolorizing agent is obtained through concentration, fluidized drying and granulation; particularly, acid reaction mother liquor is not taken as waste liquor to be discharged, and the reaction mother liquor is reused. The preparation and application of the refined decolorizing agent and cleaning for the edible oil can be used for animal and vegetable oil refined decolorizing and specially for edible oil refined decolorizing, and the industry can respond to the important contribution on the aspects of energy conservation and emission reduction provided by the country; the edible oil industry can save energy by over 80 percent, and discharge of the waste clay residue containing oil is reduced by 100 percent, and the preparation and application of the refined decolorizing agent and cleaning for the edible oil can be further used for other food and organic matter decolorizing. The product has important environmental and economic value, wide application and promotion prospects are achieved, and the product takes the leading position in the world.

The invention discloses a pure inorganic microporous desiccant and a synthetic method thereof. The chemical formula of the desiccant is K3HSiW12O40.16H2O, the molecular weight is 3343.59, a space group is Pm3<->m, cell parameters: shown as an equation, Dc=4.605g.cm<-3>, and Z=1, the synthetic method comprises the steps of weighing Na2WO4.2H2O and dissolving the Na2WO4.2H2O into water, and dropwise adding hydrochloric acid to obtain a solution A; weighing Na2SiO3 and dissolving the Na2SiO3 into distilled water so as to obtain a solution B; mixing the solution A and the solution B and adjusting the pH value of a mixed solution by using HCl, adding solid KCl into the mixed solution, separating out a white solid, performing suction filtration, and drying so as to obtain K8SiW11O39.14H2O; then dissolving the K8SiW11O39.14H2O into distilled water to obtain a solution; adjusting the pH by using diluted hydrochloric acid, dropwise adding an aqueous solution containing KCl, stirring for 30min at room temperature, standing for two days in a filtrate chamber, separating out a colorless square shaped crystal; the pure inorganic microporous desiccant is simple in the synthetic method, pure in products, high in productive rate, clear and definite in composition and structure, good in heat stability, free of corrosivity and pollution to environment, can quickly adsorb water vapour in air and water in an organic solvent, and can be recycled and reused after being dried at 150 DEG C.

The invention relates to the technical field of rubber, in particular to a fluorosilicone rubber composition and a preparation method. The composition includes 0-100 parts of first raw fluorosiliconerubber, 100 parts of second raw fluorosilicone rubber modified by fluorine-containing polyhedral oligomeric silsesquioxane, 30-120 parts of fumed silica, 5-20 parts of hydroxyfluorosilicone oil the viscosity of which (at 25 DEG C) is 90-120 mPa.s, 0-10 parts of high-vinyl-content fluorosilicone oil, 1-3 parts of 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane and 0-1 part of pigment, wherein the sidechain of polymer chains of the second raw fluorosilicone rubber modified by fluorine-containing polyhedral oligomeric silsesquioxane is trifluoropropyl polyhedral oligomeric silsesquioxane. The composition is not bonded to rollers during mixing in a three-roller machine, and has good mechanical strength, resistance to high temperature, resistance to fuel oil and good comprehensive performance after vulcanization.

The invention discloses an organic silicon modified hydroxyl polyacrylate dispersion as well as a preparation method and application thereof. The organic silicon modified hydroxyl polyacrylate dispersion is prepared from the following raw materials: a monomer mixture, an organic silicon monomer, a reactive diluent and isocyanate, in the preparation raw materials, the solid content of the organic silicon modified hydroxyl polyacrylate dispersion is 42 to 46 percent; the content of small molecular alcohol in the organic silicon modified hydroxyl polyacrylate dispersion is 1t; 0.1%; the particle size of the organic silicon modified hydroxyl polyacrylate dispersion is 1t; the wavelength is 110nm. A paint film of a water-based two-component polyurethane coating prepared from the organic silicon modified hydroxyl polyacrylate dispersion has the characteristics of high drying speed, high hardness and good chemical resistance.

The invention discloses an indirect anti-human globulin accelerated blood matching test method, which comprises: adding physiological saline to red blood cells, washing, uniformly mixing, carrying outcentrifugal separation, removing the supernatant, adding physiological saline, preparing a red blood cell suspension, adding plasma or serum, uniformly mixing, adding an indirect anti-human globulintest acceleration enhancer, uniformly mixing, incubating, adding physiological saline, carrying out centrifugal separation, slightly shaking the test tube, observing the result, and judging the resultaccording to the red blood cell agglutination or dispersion condition. According to the present invention, the cross matching test and/or the red blood cell irregular antibody screening test before the blood transfusion is accelerated and enhanced by using the indirect anti-human globulin test acceleration enhancer, and the indirect anti-human globulin test acceleration enhancer has characteristics of short incubation time, high sensitivity and strong accuracy, can be quickly detect various weak red blood cell irregular antibodies, and is suitable for emergency rapid cross-matching and red blood cell irregular antibody screening.

The invention relates to the technical field of coatings and particularly discloses a cathode electrophoretic coating with high throwing power and a preparation method of the cathode electrophoretic coating. The cathode electrophoretic coating comprises the following raw materials in parts by weight: 5-15 parts of color paste, 35-70 parts of emulsion and 30-50 parts of deionized water, wherein thecolor paste is prepared from components in parts by mass as follows: 5-30 parts of organosilicone modified acrylic resin, 5-20 parts of an environment-friendly cosolvent, 2-7 parts of a neutralizer,0.1-1 part of a surfactant, 20-45 parts of deionized water, 3-27 parts of kaolin and 5-25 parts of pigment; the emulsion is prepared from components in parts by mass as follows: 30-40 parts of organosilicone modified acrylic resin, 3-9 parts of an emulsifier, 2-10 parts of a neutralizer and 25-45 parts of deionized water. The prepared cathode electrophoretic coating can meet the requirement for workpiece surface coating of metal building materials, and a film layer with uniform thickness can be obtained at a gap or a shielded part of a coated workpiece.