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    • 3. 发明公开
    • Thermoplastic elastomers comprising vinyl halide grafted to crosslinkd acrylic latexes
    • 弹性体热塑性聚合物乙烯基卤化物gepfropft auf vernetzte Acryllatices。
    • EP0464584A2
    • 1992-01-08
    • EP91110437.0
    • 1991-06-25
    • The Geon Company
    • Wypart, Roman WaclawStanislawcyk, VicDearth, Miles BrentSkillicorn, Douglas Earl
    • C08F265/04
    • C08F265/04C08L51/04C08F214/06C08L2666/04
    • Thermoplastic elastomer resins are described which comprise vinyl halide grafted to crosslinked acrylic latex particles comprising predominantly acrylate-containing, crosslinked polymer chains derived from

      (A) at least one acrylate monomer of the formula



              CH₂=C(R₁)C(O)OR₂   (I)



      wherein R₁ is hydrogen or methyl; and R₂ is an alkyl group containing from 1 to 20 carbon atoms, an alkoxy alkyl or alkyl thioalkyl group containing from 2 to about 7 carbon atoms, or a cyano alkyl group containing from 2 to about 7 carbon atoms; and
      (B) at least one alpha, beta-unsaturated dicarboxylic acid, provided that the dicarboxylic acid repeating units are optional when the TPE resin contains less than about 35% by weight of vinyl halide.

      An improved process is described for preparing the crosslinked acrylic latexes utilized in the preparation of TPEs, and a process is described for preparing TPEs of the invention which comprises

      (A) preparing a crosslinked acrylic latex by polymerizing in water a mixture comprising at least one acrylate monomer of Formula I, and at least one multifunctional crosslinking monomer, an initiator, and from 0 to about 20 phm of at least one alpha, beta-unsaturated dicarboxylic acid while delaying the polymerization of at least a portion of the crosslinking monomer until at least a portion of the acrylic monomer has polymerized;
      (B) grafting a vinyl halide monomer to the crosslinked latex particles prepared in step (A) in water in the presence of a second initiator to form an aqueous mixture containing a TPE resin;
      (C) recovering the TPE resin from the aqueous mixture; and
      (D) compounding with suitable additives to produce useful thermoplastic elastomers.
    • 描述了热塑性弹性体树脂,其包含接枝到主要包含丙烯酸酯的交联聚合物链的交联丙烯酸胶乳颗粒的乙烯基卤化物,所述聚合物链衍生自(A)至少一种式CH 2 = C(R 1)C(O)OR 2(I >其中R 1是氢或甲基; R 2是含有1至20个碳原子的烷基,含有2至约7个碳原子的烷氧基烷基或烷基硫代烷基,或含有2至约7个碳的氰基烷基 原子;和(B)至少一种α,β-不饱和二羧酸,条件是当TPE树脂含有小于约35重量%的乙烯基卤化物时,二羧酸重复单元是任选的,描述了一种改进的方法来制备 用于制备TPE的交联丙烯酸胶乳,以及制备本发明的TPE的方法,其包括(A)通过在水中聚合制备交联的丙烯酸胶乳混合物c 至少一种式I的丙烯酸酯单体和至少一种多官能交联单体,引发剂和0至约20phm的至少一种α,β-不饱和二羧酸,同时延迟了至少一部分 直到丙烯酸单体的至少一部分已经聚合; (B)在第二引发剂的存在下,将乙烯基卤单体接枝到在步骤(A)中制备的交联胶乳颗粒中,以形成含有TPE树脂的含水混合物; (C)从含水混合物中回收TPE树脂; 和(D)与合适的添加剂混合以制备有用的热塑性弹性体。 一世