申请人:UNION CARBIDE CHEMICALS & PLASTICS TECHNOLOGY CORPORATION
公开号:EP0604958A2
公开(公告)日:1994-07-06
A finishing process for a polymer containing an active catalyst residue comprising the following steps:
(i) introducing one or more ethylenically unsaturated monomers, a transition metal catalyst system, and, optionally, hydrogen into one or more reaction zones in such amounts and under such polymerization conditions that a polymer will be produced having a crystallinity of less than about 10 percent by weight;
(ii) maintaining the reaction zone(s) at a temperature below the sticking temperature of the polymer and in an essentially oxygen-free atmosphere;
(iii) introducing into the reaction zone(s) (a) 2,6-di-tert-butyl-4-alkyl phenol and/or alkyl-3-(3-5-di-tert-butyl-4-hydroxy phenyl)-propionate wherein the alkyl group has 1 to 20 carbon atoms and is linear or branched chain, or a complex thereof, and (b) zinc oxide; a hydrotalcite containing magnesium, aluminum, and/or zinc cation(s); or a zeolite containing sodium, calcium, magnesium and/or zinc cation(s) in sufficient amounts to stabilize the polymer and neutralize acid formed in the post-reaction zone(s);
(iv) recovering the polymer from the reaction zone(s) and passing the polymer into one or more post-reaction dry-blending zones, said zone(s) being maintained at a temperature below the sticking temperature of the polymer and in an essentially oxygen-free atmosphere;
(v) contacting the polymer with water in an amount sufficient to hydrolyze any catalyst residue and liberate complexed phenolic compound(s);
(vi) introducing into the post-reaction zone(s), one or more catalyst deactivator compounds in an amount sufficient to essentially deactivate the hydrolyzed residue of the transition metal catalyst system; and
(vii) introducing into the post-reaction zone(s), one or more thermal and/or photo-oxidation stabilizers in an amount sufficient to substantially prevent the thermal and photo-oxidation of the polymer.
一种含有活性催化剂残余物的聚合物精加工工艺,包括以下步骤:
(i) 将一种或多种乙烯基不饱和单体、过渡金属催化剂体系以及氢(可选)引入一个 或多个反应区,引入量和聚合条件应使生产的聚合物的结晶度小于约 10%(按 重量计);
(ii) 将反应区的温度保持在聚合物的粘滞温度以下,并保持在基本无氧的气氛中;
(iii) 在反应区中引入 (a) 2,6-二叔丁基-4-烷基酚和/或 3-(3-5-二叔丁基-4-羟基苯基)-丙酸烷基酯,其中烷基具有 1 至 20 个碳原子且为直链或支链,或其复合物,以及 (b) 氧化锌;含有镁、铝和/或锌阳离子的氢滑石;或含有钠、钙、镁和/或锌阳离子 的沸石,其用量足以稳定聚合物并中和后反应区形成的酸;
(iv) 从反应区回收聚合物,并将聚合物送入一个或多个反应后干混区,所述反应 后干混区的温度应低于聚合物的粘结温度,并应保持在基本无氧的环境中;
(v) 将聚合物与足够量的水接触,以水解催化剂残留物并释放出络合酚类化合物;
(vi) 将一种或多种催化剂失活剂化合物引入后反应区,其用量应足以使过渡金属 催化剂体系的水解残余物基本失活;以及
(vii) 将一种或多种热和/或光氧化稳定剂引入后反应区,其用量应足以基本防止聚合物 的热和光氧化。