基本信息:
- 专利标题： Method for the preparation of a vinyl chloride-based polymer
- 专利标题（中）：Verfahren zur Herstellung eines Polymers auv Vinylchloridbasis。
- 申请号：EP90400021.3 申请日：1990-01-04
- 公开(公告)号：EP0377533A2 公开(公告)日：1990-07-11
- 发明人： Noguki, Genji , Kuwabara, Kouzou , Hoshida, Shigehiro
- 申请人： SHIN-ETSU CHEMICAL CO., LTD.
- 申请人地址： 6-1, Ohtemachi 2-chome Chiyoda-ku Tokyo JP
- 专利权人： SHIN-ETSU CHEMICAL CO., LTD.
- 当前专利权人： SHIN-ETSU CHEMICAL CO., LTD.
- 当前专利权人地址： 6-1, Ohtemachi 2-chome Chiyoda-ku Tokyo JP
- 代理机构： Armengaud Ainé, Alain
- 优先权： JP784/89 19890105
- 主分类号： C08F14/06
- IPC分类号： C08F14/06 ; C08F2/20
摘要：
Foaming above the aqueous polymerization mixture can be efficiently reduced in suspension polymerization of vinyl chloride monomer in an aqueous medium contained in a polymerization reactor equipped with a reflux condenser for removal of the heat of polymerization by admixing the polymerization mixture with additives comprising (a) from 0.002 to 0.007 part by weight of a partially saponified polyvinyl alcohol having a degree of saponification in the range from 20 to 50% by moles and an average degree of polymerization in the range from 200 to 400 and (b) from 0.001 to 0.01 part by weight of a silicone-based defoaming agent, each amount being per 100 parts by weight of the vinyl chloride monomer or the monomer mixture mainly composed of vinyl chloride, at a moment, preferably, before the reflux condenser is brought into operation. By this improvement, the resultant polyvinyl chloride resin product may have a greatly improved bulk density and particle size distrribution without causing polymer scale deposition on the reactor walls.
摘要（中）：
含水聚合混合物以上的发泡可以有效地降低氯乙烯单体在装有回流冷凝器的聚合反应器中的含水介质的悬浮聚合中，以通过将聚合混合物与添加剂混合来除去聚合反应热，所述添加剂包含（a） 0.002〜0.007重量份皂化度为20〜50摩尔％，平均聚合度为200〜400的部分皂化聚乙烯醇，（b）0.001〜0.01份 重量的硅酮类消泡剂，各量相对于100重量份氯乙烯单体或主要由氯乙烯组成的单体混合物，此时优选在回流冷凝器投入运行之前。 通过这种改进，所得到的聚氯乙烯树脂产品可以大大改善堆积密度和粒度分布，而不会在反应器壁上沉积聚合物垢。
公开/授权文献:
- EP0377533B1 Method for the preparation of a vinyl chloride-based polymer 公开/授权日：1993-07-21
IPC结构图谱:
| C | 化学；冶金 |
| --C08 | 有机高分子化合物；其制备或化学加工；以其为基料的组合物 |
| ----C08F | 仅用碳—碳不饱和键反应得到的高分子化合物 |
| ------C08F14/00 | 具有1个或更多的不饱和脂族基化合物的均聚物或共聚物，每个不饱和脂族基只有1个碳—碳双键，并且至少有1个是以卤素为终端 |
| --------C08F14/02 | .含氯单体 |
| ----------C08F14/04 | ..含两个碳原子单体 |
| ------------C08F14/06 | ...氯乙烯 |