| 摘要 |
<p>The invention relates to an emulsified acrylic copolymer for facade paints, product obtained by in-emulsion copolymerizing a monomer mixture consisting of 1,0...8,0 parts of ethyl acrylate, 20,0...45,0 parts of butyl acrylate, 0,5...2,0 parts of acrylic acid, 35,0...49,0 parts of methyl methacrylate, 4,0...10,0 parts of butyl methacrylate, in the presence of 0,25...1,0 sodium dodecylsulphate as 20% aqueous solution, 7,5...11,0 sodium dodecylbenzene sulphonate as 20% aqueous solution, 0,7...1,3 parts of ethoxylated nonylphenol with 16 ethylenoxide moles, 0,5...1,5 ethoxylated nonylphenol with 30 ethylenoxide moles, 0,08...0,12 parts of tert-dodecyl mercaptan, 0,3...0,6 parts of potassium persulphate, 0,2...0,4 parts of sodium bicarbonate, 90,0...100,0 parts of soft water and the final neutralization of the emulsified copolymer with 0,5...8,0 parts of ammonia, as 25% aqueous solution, the parts being expressed by weight.</p> |
