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    • 3. 发明公开
    • POLYMER, PROCESS AND COMPOSITION
    • 聚合物,工艺和组成
    • EP2809690A1
    • 2014-12-10
    • EP13704393.1
    • 2013-02-04
    • DSM IP Assets B.V.
    • NABUURS, TijsSMAK, Yvonne WilhelminaOVERBEEK, Gerardus Cornelis
    • C08F222/02C08F222/14C09D135/00
    • There is described a method of preparing a post-modified polymer the method comprising the steps of: (1) polymerising a monomer composition comprising from 2.5 to 75% by weight of the total monomer composition of at least one itaconic anhydride, precursor thereof and/or derivative thereof in a polymerisation method to obtain an itaconate Polymer A; (2) reacting in a post modification step at least 10 mole-% of the anhydride groups, anhydride precursor groups and/or anhydride derived groups of the Polymer A obtained from step (1) with a Nucleophile B to form a post-modified Polymer C, and optionally using said polymer C as seed or stabiliser in a further step (3) to form a sequential Polymer D.
    • 描述了低数均分子量(MN <10kD)和高玻璃化转变温度(> 75℃)共聚物(任选地为固体级低聚物(SGO)),其包含(a)至少20重量%的衣康酸 (b)不超过40%的亲水性单体,优选酸官能单体,其量足以实现65-325mg KOH / g固体聚合物的酸值; (c)任选不超过70%的不是(a)或(b)的其他单体,其乙烯基芳族单体的最大含量为40重量%和/或甲基丙烯酸酯的最大含量为 40重量%; 其中单体(a),(b)和(c)的重量百分比计算为共聚物中单体总量为100%的比例。