公开(公告)号：US06291600B1

公开(公告)日：2001-09-18

申请号：US08053974

申请日：1993-04-09

申请人： Seiichi Masuko ,  Ichisaburo Nakamura ,  Yoshimatsu Naka ,  Keiichi Fukuda ,  Akira Yamamoto ,  Yasuyuki Hatakeyama ,  Akihiro Yamaguchi ,  Keizaburo Yamaguchi

发明人： Seiichi Masuko ,  Ichisaburo Nakamura ,  Yoshimatsu Naka ,  Keiichi Fukuda ,  Akira Yamamoto ,  Yasuyuki Hatakeyama ,  Akihiro Yamaguchi ,  Keizaburo Yamaguchi

IPC分类号： C08F200

CPC分类号： C08F14/06 ,  C08F2/004

摘要： In a novel method of homo- or copolymerization of vinyl chloride, a specified coating agent is applied on the surfaces of the portions which will become into contact with the vinyl chloride monomer during the polymerization process. The coating agent is in a form of an aqueous solution of a modified condensation product of phenol and aldehyde, the pH of the solution being adjusted in a range that the product is dissolved at an ambient temperature upon coating of the solution and separates out of the solution upon being heated on the surfaces. The wall surface of the polymerization tank and the like is then coated with a thin film of the coating agent having a uniform thickness and being strongly adhered to the wall surface, thereby providing an excellent effect of preventing adhesion of the product polymer to the wall surface.

摘要翻译： 在氯乙烯均聚或共聚的新方法中，在聚合过程中将在与氯乙烯单体接触的部分的表面上施加特定的涂布剂。 涂层剂是苯酚和醛的改性缩合产物的水溶液形式，溶液的pH值在产物在环境温度下溶解的范围内被调节，并在分离出 在表面上加热时的溶液。 然后将聚合槽等的壁面用均匀厚度的涂布剂的薄膜涂布并牢固地附着在壁面上，从而提供优异的防止产品聚合物粘合到壁面上的效果 。

公开(公告)号：US5147948A

公开(公告)日：1992-09-15

申请号：US631932

申请日：1990-12-21

申请人： Seiichi Masuko ,  Ichisaburo Nakamura ,  Keiichi Fukuda ,  Yasuyuki Hatakeyama ,  Akihiro Yamaguchi ,  Keizaburo Yamaguchi

发明人： Seiichi Masuko ,  Ichisaburo Nakamura ,  Keiichi Fukuda ,  Yasuyuki Hatakeyama ,  Akihiro Yamaguchi ,  Keizaburo Yamaguchi

IPC分类号： C08F14/06 ,  C08F2/00 ,  C08F2/20 ,  C08F14/00 ,  C09D181/02

CPC分类号： C08F2/004

摘要： A method for polymerizing vinyl chloride comprises polymerizing vinyl chloride in an aqueous medium or bulk-polymerizing vinyl chloride, wherein the inner wall of a polymerizer and parts of devices which come in contact with the monomer during the polymerization are coated, prior to the polymerization, with a reaction product having a molecular weight ranging from 500 to 100,000, obtained by condensing a polyhydric phenol and sulfur dichloride in the presence of a Lewis acid as a catalyst. The amount of the polymer adhered to the polymerizer during polymerization of vinyl chloride is substantially lowered and the adhered polymer can be easily washed away through simple water washing according to the foregoing method. Moreover, the method does not adversely affect the reaction time and the quality of the resulting product at all.