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发明公开
CN108017744A 一种粉末羧基丁苯橡胶及其制备方法和应用 有权

一种粉末羧基丁苯橡胶及其制备方法和应用
摘要：
本发明涉及聚合物领域，具体地，涉及一种粉末羧基丁苯橡胶及其制备方法和应用。所述粉末羧基丁苯橡胶的制备方法包括以下步骤：(1)将含有丁二烯、苯乙烯、丙烯酸、缓聚剂、分子量调节剂、水、pH缓冲剂、螯合剂、乳化剂和引发剂的混合体系依次在55‑60℃和65‑75℃下进行聚合反应；(2)将第二聚合反应产物与含有极性单体、苯乙烯和丁二烯的油相以及含有水、引发剂、乳化剂和分子量调节剂的水相进行混合，并将所得混合物依次在75‑80℃和85‑90℃下进行聚合反应；(3)将聚合反应产物进行喷雾干燥。采用本发明提供的方法制备得到的粉末羧基丁苯橡胶不仅具有非常高的凝胶含量，而且将用作树脂/橡胶增韧剂，能够提高树脂/橡胶的韧性和刚性。
摘要（英）：

The invention relates to the field of polymers, and in particular relates to powdered carboxylated styrene-butadiene rubber and a preparation method and application thereof. The preparation method ofthe powdered carboxylated styrene-butadiene rubber includes the following steps: (1) performing polymerization on a mixed system of butadiene, styrene, acrylic acid, a retarder, a molecular weight regulator, water, a pH buffer, a chelating agent, an emulsifier and an initiator respectively at 55DEG C to 60DEG C and 65DEG C to 75DEG C; and (2) mixing a second polymerization reaction product with anoil phase containing a polar monomer, styrene and butadiene, and an aqueous phase containing water, an initiator, an emulsifier and a molecular weight regulator, performing polymerization on the mixture respectively at 75 DEG C to 80 DEG C and 85 DEG C to 90 DEG C; and (3) spray-drying the polymerization reaction product. The powdered carboxylated styrene-butadiene rubber prepared by the method provided by the present invention has a very high gel content, also acts as a resin/rubber toughening agent, and can improve the toughness and rigidity of resin/rubber.

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