The copolymers comprise 100 pts. wt. of the butadiene monomer or monomer mixture and =10 pts. wt. of the ester monomer of formula (I): CH2=C(R)-C(O)-OR1 (where R is linear 1-4C alkyl; R1 is 1-12C alkyl or cycloalkyl) esp. methyl methacrylate or butyl methacrylate, additional units of these of orther acrylic monomers being grafted onto the copolymers. They are prepared by emulsifying the above components in the given proportions, in water in the presence of an anionic surfactant and a cation selected from triethanol-ammonium, tri(2-propanol)-ammonium, diethanol ammonium and 1-3C alkyl-diethanol-ammonium, adding the polymerisation catalyst and maintaining the reactants in emulsion until almost all the unsatd. comonomers have reacted to form the desired copolymer. The copolymers are resistant to plasticisers such as dioctyl phthalate.
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机译：共聚物包含100点。重量丁二烯单体或单体混合物的含量≥10 pts。重量式（I）的酯单体的结构式：CH 2 ＝ C（R）-C（O）-OR1（其中R是线性1-4C烷基; R 1是1-12C烷基或环烷基），特别是。甲基丙烯酸甲酯或甲基丙烯酸丁酯，将这些其他丙烯酸单体的其他单元接枝到共聚物上。它们是通过在阴离子表面活性剂和选自三乙醇铵，三（2-丙醇）铵，二乙醇铵和1-3C烷基二乙醇-阳离子的阳离子存在下在水中以给定比例乳化上述组分而制备的。铵，添加聚合催化剂并使反应物保持乳液状态，直到几乎所有未饱和状态。共聚单体反应形成所需的共聚物。该共聚物对增塑剂如邻苯二甲酸二辛酯具有抗性。
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