Waterproof glue formula?
Polyvinyl alcohol and formaldehyde are used as main raw materials, supplemented by phenol, urea, melamine, acetic acid and urotropine. As for the production process, there is a patent. 20g of styrene, butyl acrylate 19g, 4g of methyl methacrylate, 0.9g of acrylic acid, 0.7g of acrylamide, 0.4g of silicone monomer (a-65438+op-10), and 0.5g of mixed emulsifier10, op.
The polymerization process is as follows:
1, completely dissolving 0. 15g ammonium persulfate with 4g water to prepare an initiator aqueous solution;
2. Add1.05g mixed emulsifier and 25g deionized water into a 200ml flask and mix them evenly. Polymerization monomers such as styrene, butyl acrylate, methyl methacrylate, acrylic acid and acrylamide are added. Fully stirring and emulsifying under stirring to obtain monomer pre-emulsion.
3. Add 0.45g mixed emulsifier and 25g deionized water into a 200ml four-necked flask, raise the temperature to 80-84℃ in water bath, add 5% pre-emulsion and 1/3 initiator solution, and react at 15, while dropping the remaining pre-emulsion and initiator solution, and keep the temperature at 65438.
4. Cooling to below 40℃, adjusting the pH value of the emulsion to 7-8 with ammonia water, adding 1.5g polyurethane thickener (purchased from Jiangsu Li Wen Jia Chemical Co., Ltd., model LWJ-8W) for thickening, filtering and packaging.
What are the properties and uses of nano-waterproof glue?
1, nano-silicon waterproof glue is developed by high-tech nano-technology, which is an environmentally-friendly waterproof product combining rigidity with flexibility. This product has excellent waterproof performance of osmotic crystallization, and also has waterproof performance of high elastic coating of acrylate polymer waterproof emulsion. Can be dilute and sprayed on that surface of dry porous inorganic building materials such as brick, cement, stone, gypsum, lime, fangci paint, asbestos products, perlite, insulation boards and the like. To form a colorless permanent waterproof layer; It can also be directly brushed on the building surface with the stock solution of this product to form a highly elastic waterproof coating for waterproofing.
It can also be compounded with ordinary portland cement to become JS composite waterproof coating. Its basic color is white, and white fillers such as talcum powder, white powder and wollastonite powder are added appropriately, which has obvious heat reflection function when applied to the roof.
2. It can also be mixed with pigments to make various colors, which can be used for decoration and beautification on roofs and external walls. This product has excellent water resistance, weather resistance and durability; Non-toxic, tasteless, environmental protection and pollution-free. The coating is seamless as a whole and can adapt to the subtle changes of the base. Widely used in basement, roof, exterior wall, bathroom, pool, canal dam, culvert, cable trench, manhole, road and bridge deck and other waterproof projects. The technical indicators meet the JC/T902-2002 [Permeable Crystalline Waterproofing Agent] standard, and the technical indicators after being compounded with cement meet the JC/T894-200 1 standard.
The above contents mainly describe my views on waterproof glue formula? What are the properties and uses of nano-waterproof glue? Waterproof glue is more popular than other glues. Although this kind of glue is not expensive, it can be seen everywhere because of its good material, but it is not easy to know the formula. There are some very special substances in the glue produced by each brand, which are generally not announced.