46results about How to "Reduce hydrophilic groups" patented technology

The invention discloses a silicone modified acrylic ester emulsion and a preparation method thereof. The emulsion is prepared from the following raw materials in parts by weight: 6.5-9 parts of acrylic ester mixed monomers, 1-3.5 parts of an organosilicone monomer, 0.4-0.6 part of an emulsifier, 0.2-0.3 part of an initiating agent, 0.01-0.03 part of a pH conditioning agent, 28-32 parts of deionized water, wherein the acrylic ester mixed monomers are methyl methacrylate and butyl acrylate with the mass ratio of (5.5-6.5):(3.5-4.5); the organosilicone monomer is gamma- 3-[Tris(trimethylsiloxy)silyl]propyl methacrylate. According to the emulsion, the reactive emulsifier is adopted for polymerization reaction, the prepared emulsion is stable, and the latex film of the emulsion has lower surface energy and better water resistance, and can be used as the main film forming matter of a metal anti-corrosion coating.

The invention relates to an adhesive for a veneering of an artificial board and a preparation method of the adhesive. The adhesive comprises the components in parts by weight: 200 parts of formaldehyde, 20-50 parts of a modifier, 110-140 parts of urea, 5-15 parts of tripolycyanamide, and 1-10 parts of a tackifier. By addition of appropriate parts of modifier, on the one hand, the high solid content adhesive can be prepared without dehydration, moisture brought to a base material during coating is reduced, permeation of the adhesive is reduced, and glue penetration is reduced. In addition, through addition of the modifier, the molar ratio of formaldehyde and urea in the polycondensation phase in the urea resin synthetic process can be greatly reduced, so that hydrophilic radicals in the resin structure are greatly decreased. Meanwhile, tripolycyanamide in appropriate parts is added to modify, so that the water-solubility of the adhesive is reduced, the hydrophobicity of the adhesive is enhanced, and glue penetration is beneficially reduced. The tackifier in appropriate parts is added to improve the initial adhesion of the adhesive and reduce malposition of a veneer on the base material, so that the product quality is improved.

The invention discloses a method for preparing a waterproof polyvinyl alcohol trademark adhesive. The method comprises the following steps of: (1) weighing a certain amount of polyvinyl alcohol, dissolving weighed polyvinyl alcohol in water, heating in a water bath, and stirring for swelling to obtain a 8-20% polyvinyl alcohol solution; (2) adjusting the temperature of the polyvinyl alcohol solution obtained from step (1), adding aluminum sulfate, and stirring at constant temperature to obtain the waterproof polyvinyl alcohol trademark adhesive, wherein aluminum sulfate is 12-25% the weight of polyvinyl alcohol. The waterproof polyvinyl alcohol trademark adhesive has strong water resistance.

The invention belongs to the field of cosmetics, and particularly relates to a method for preparing a fiber nonwoven fabric for facial masks. The method adopts natural silk as a raw material, and obtains preprocessed silk fibroin liquid through degumming and dialysis; the natural Genipin with non-toxic side effects and CaCl2 are used as a crosslinking agent, so that the tensile strength and the breaking strain are improved. Some of the fat-soluble components of the skin can be dissolved, and the absorption of other effective nutrients can be improved. The method utilizes elastase and pepsin tocarry out secondary enzymatic hydrolysis of the preprocessed squid skin liquid, increases the number of free amino groups therein, and allows the protein in the squid skin liquid and the saccharide substances in the system to form a stable crosslinked network system. The method can effectively reduce the problem that the mechanical properties are degraded due to water absorption and swelling whenthe non-woven fabric acts on the mask nutrient solution, and the interaction of the components can avoid the problem of unintentional tearing. The method solves the problem that the fiber nonwoven fabric for facial masks which is commonly used at present is easy to be torn in use.

The invention discloses a biochar-based plastic film material and a preparation method thereof. The biochar-based plastic film material is prepared by mixing the following raw materials in parts by weight: 20-40 parts of modified biochar, 40-60 parts of polyethylene, 1.5-2 parts of dispersing agent and 1-2.5 parts of coupling agent. According to the invention, the biochar is combined with plastic by a modification technology, to reduce the dosage of the plastic in agriculture and accelerate the decomposition course to plastic products so as to achieve the purpose of protecting the environment.

The invention discloses an environmentally-friendly adhesive, and relates to the technical field of adhesives. The problem of low adhesive strength of starch adhesives is solved. The adhesive is prepared from, by weight, 20-30 parts of starch, 100-150 parts of water, 1-10 parts of 1 mol / L hydrochloric acid, 0.04-0.06 part of 0.1% potassium permanganate, 2-4 parts of sodium hypochlorite, 1-10 partsof a 4% sodium hydroxide solution and 1-2 parts of a cross-linking agent. A preparation method of the environmentally-friendly adhesive comprises the following steps: 1) weighing the starch, adding the starch into the water, performing water bath heating to 50-60 DEG C while stirring, dropwise adding the 1 mol / L hydrochloric acid, and performing uniform stirring; 2) adding the 0.1% potassium permanganate, performing a reaction for 10-15 min, adding the sodium hypochlorite, and performing a reaction for 10-20 min; 3) rising the temperature to 60-70 DEG C, adding the 4% sodium hydroxide solution to adjust the pH value to 12-13.5, and performing a reaction for 45-90 min; and 4) adding the cross-linking agent, performing uniform stirring, adding a pH adjuster to adjust the pH value to 10-12,and performing stirring and reacting for 45-90 min to obtain the environmentally-friendly adhesive. The environmentally-friendly adhesive has the advantages of non-toxicity, environmental protection,low cost, high bonding strength, and meeting of plate production process requirements.

The invention discloses a silicone-modified acrylic micro-nano emulsion and a preparation method thereof. Unsaturated acrylic monomers, silsesquioxanes containing carbon-carbon double bonds, cross-linking monomers and hydrophobic monomers are used as polymerization raw materials. Add nano-SiO2 particles and organic nano-zinc hydroxide as hydrophobic fillers, use 2-acrylamide amino-2-methylpropanesulfonic acid and maleic acid polyoxyethylene ether monoester carboxylate as emulsifier system, through The method of emulsion polymerization prepares a polymer emulsion with good stability, high and low temperature resistance, abrasion resistance, superhydrophobic performance and good mechanical properties, which can be widely used in coatings, adhesives, waterproofing agents and other fields. Good development prospects.