| 摘要 |
The invention relates to a process for producing emulsion adhesive copolymers, which are employed in making autoadhesive products and in pasting synthetic and natural supports. According to the invention, the process consists in emulsion polymerizing a mixture of comonomers comprising 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate, di-2-ethylhexyl maleate, vinyl acetate, acrylic acid and acrylamide, in the presence of an initiating agent comprising 0.3 ... 0.6 parts of potassium persulphate dissolved in 30 parts of water, an anionic_non-ionic 1 : 1 emulsifying system comprising 1.5 ... 2 parts of natrium dibutyl sulphosuccinate, 1,5 ... 2 parts nonylphenolepolyethoxylate having a degree of ethoxylation ranging from 16 to 40, a protective colloid comprising 1.5 ... 2 parts of polyvinyl alcohol having a degree of hydrolysis of 80, a pH stabilizer comprising 0.1 ... 0.2 parts of NaHCO3 and 55 parts parts of water as polymerizing medium, for a calculated solid substance content of at most 55 %, the parts being expressed by weight.
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