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1. 发明授权

US06780945B2 Process for producing vinyl chloride polymers 失效
标题翻译：生产氯乙烯聚合物的方法
公开(公告)号：US06780945B2
公开(公告)日：2004-08-24
申请号：US10087821
申请日：2002-03-05
申请人： Toshihiko Kawakubo , Tadashi Amano
发明人： Toshihiko Kawakubo , Tadashi Amano
IPC分类号： C08F1406
CPC分类号： C08F14/06 , C08F2/16 , C08F2/44
摘要： A process for polymerizing vinyl chloride or a monomer mixture containing vinyl chloride in an aqueous medium in a polymerization vessel fitted with a reflux condenser, characterized by starting to add (A) an anti-foam agent, and (B) a partially saponified polyvinyl alcohol with an average degree of polymerization of 100 to 500 and a saponification degree of 75 to 85 mole %, to a reaction mixture during the operation of said reflux condenser, and continuing the addition of (A) and (B) until recovery of unreacted monomers from said polymerization vessel is completed, thereby preventing the polymer slurry from foaming, rising, or scattering during polymerization or recovery of unreacted monomers.
摘要翻译：在装有回流冷凝器的聚合容器中，在含水介质中聚合氯乙烯或含有氯乙烯的单体混合物的方法，其特征在于开始添加（A）消泡剂，和（B）部分皂化的聚乙烯醇平均聚合度为100〜500，皂化度为75〜85摩尔％，在回流冷凝器运转时，反应混合物继续加入（A）和（B）直到回收未反应的单体从聚合容器完成，从而防止聚合物浆料在聚合或回收未反应单体期间发泡，起泡或散射。

2. 发明授权

US06639027B2 Production process for vinyl-based polymer 失效
标题翻译：乙烯基聚合物的生产工艺
公开(公告)号：US06639027B2
公开(公告)日：2003-10-28
申请号：US10319550
申请日：2002-12-16
申请人： Ryuichi Saito , Tadashi Amano , Toshihiko Kawakubo
发明人： Ryuichi Saito , Tadashi Amano , Toshihiko Kawakubo
IPC分类号： C08F242
CPC分类号： C08F2/40 , C08F14/06 , Y10S526/91 , Y10S526/911 , C08F2/16
摘要： A production process for a vinyl-based polymer is provided. The production process comprises a step for polymerizing a vinyl-based monomer by a radical reaction within an aqueous medium in a polymerization vessel, and a step for supplying a reaction inhibitor with a melting point of no more than 40° C. from a reaction inhibitor supply tank to the polymerization vessel via a reaction inhibitor supply pipe. The reaction inhibitor supply tank and the reaction inhibitor supply pipe are heated, and the reaction inhibitor is added to the polymerization vessel in a liquid state with a viscosity of no more than 200 mPa·s. The reaction inhibitor can be added to the polymerization mixture without the use of an organic solvent even at low temperatures, and problems such as the solidification of the reaction inhibitor inside the supply tank or piping, and subsequent blocking of the piping do not occur.
摘要翻译：提供了一种乙烯基类聚合物的制造方法。制造方法包括在聚合容器内的水性介质中通过自由基反应聚合乙烯基类单体的步骤，以及从反应抑制剂供给不超过40℃的熔点的反应抑制剂的步骤通过反应抑制剂供应管向聚合容器供应罐。反应抑制剂供给槽和反应抑制剂供给管被加热，反应抑制剂以粘度不超过200mPa.s的液态加入到聚合容器中。反应抑制剂即使在低温下也可以不使用有机溶剂而添加到聚合混合物中，并且不会发生诸如供给罐或管道内的反应抑制剂的固化以及随后的管道堵塞等问题。

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