公开(公告)号：US20040106725A1

公开(公告)日：2004-06-03

申请号：US09850754

申请日：2001-05-08

Applicant: BASF AG

Inventor： Jonathan P. Antonucci ,  Michael A. Taylor ,  Koichi Takamura ,  Robert Racz

IPC: C08K003/20

CPC classification number: C08F257/02 ,  C08F12/04 ,  C08F2/24

Abstract: A polystyrene seed latex composition is provided having a total emulsion polymer content of from 0.2 to 2.0 weight percent and a particle diameter less than 150 null. The seed latex is produced on a continuous basis by feeding to a continuous stirred reactor an emulsion stream and initiator stream. The feed streams are mixed in the stirred reactor at room temperature to produce the seed latex. Preferably, the initiator stream comprises a sodium formaldehyde sulfoxylate reducing agent. The amount of initiator charged into the continuous seed reactor is sufficient to complete both the seed and a subsequent continuous latex polymerization reaction.

Abstract translation: 提供聚乳酸聚合物含量为0.2-2.0重量％且粒径小于150的聚苯乙烯种子胶乳组合物。 通过向连续搅拌的反应器中加入乳液流和引发剂流，连续地生产种子胶乳。 将进料流在搅拌的反应器中在室温下混合以产生种子胶乳。 优选地，引发剂流包含甲醛次硫酸氢钠还原剂。 装入连续种子反应器中的引发剂的量足以完成种子和随后的连续胶乳聚合反应。