公开(公告)号：US5977273A

公开(公告)日：1999-11-02

申请号：US74650

申请日：1998-05-08

申请人： Masaru Saeki ,  Kizo Onishi ,  Shunro Hayashi

发明人： Masaru Saeki ,  Kizo Onishi ,  Shunro Hayashi

IPC分类号： C08F2/20 ,  C08F2/00 ,  C08F2/18 ,  C08F8/12 ,  C08F14/00 ,  C08F14/06 ,  C08F16/02 ,  C08F16/06

CPC分类号： C08F14/06 ,  C08F8/12

摘要： A dispersing stabilizer suitable for suspension polymerization of vinyl chloride or a monomer mixture mainly composed of vinyl chloride which can be used in a hot water charging polymerization process without any problems, and which can produce vinyl chloride homopolymer or copolymers having a good porosity, a large bulk density, a very low content of coarse particles and good physical properties, the dispersing stabilizer comprising a polyvinyl alcohol having a degree of hydrolysis of 75 to 85% by mole, an absorbance of not less than 0.1 measured at a wavelength of 280 m.mu.with respect to the 0.1% by weight aqueous solution, a content of carboxyl group of 0.01 to 0.15% by mole and a cloud point of not less than 50.degree. C. measured with respect to the 0.1% by weight aqueous solution

摘要翻译： 适用于氯乙烯悬浮聚合的分散稳定剂或主要由氯乙烯组成的单体混合物，可用于热水充填聚合过程中无任何问题，并可生产具有良好孔隙率的氯乙烯均聚物或共聚物 堆积密度，非常低的粗颗粒含量和良好的物理性能，分散稳定剂包括水解度为75至85摩尔％的聚乙烯醇，在波长280μm下测量的吸光度不小于0.1 相对于0.1重量％的水溶液，相对于0.1重量％的水溶液测定的羧基含量为0.01〜0.15摩尔％，浊点为50℃以上

公开(公告)号：US5780547A

公开(公告)日：1998-07-14

申请号：US407048

申请日：1995-03-17

申请人： Masaru Saeki ,  Kizo Onishi ,  Shunro Hayashi

发明人： Masaru Saeki ,  Kizo Onishi ,  Shunro Hayashi

IPC分类号： C08F2/20 ,  C08F2/00 ,  C08F2/18 ,  C08F8/12 ,  C08F14/00 ,  C08F14/06 ,  C08F16/02 ,  C08F16/06

CPC分类号： C08F14/06 ,  C08F8/12

摘要： A dispersing stabilizer suitable for suspension polymerization of vinyl chloride or a monomer mixture mainly composed of vinyl chloride which can be used in a hot water charging polymerization process without any problems, and which can produce vinyl chloride homopolymer or copolymers having a good porosity, a large bulk density, a very low content of coarse particles and good physical properties, the dispersing stabilizer comprising a polyvinyl alcohol having a degree of hydrolysis of 75 to 85% by mole, an absorbance of not less than 0.1 measured at a wavelength of 280 m.mu. with respect to the 0.1% by weight aqueous solution, a content of carboxyl group of 0.01 to 0.15% by mole and a cloud point of not less than 50.degree. C. measured with respect to the 0.1% by weight aqueous solution.

摘要翻译： 适用于氯乙烯悬浮聚合的分散稳定剂或主要由氯乙烯组成的单体混合物，可用于热水充填聚合过程中无任何问题，并可生产具有良好孔隙率的氯乙烯均聚物或共聚物 堆积密度，非常低的粗颗粒含量和良好的物理性能，分散稳定剂包括水解度为75至85摩尔％的聚乙烯醇，在波长280μm下测量的吸光度不小于0.1 相对于0.1重量％的水溶液，相对于0.1重量％的水溶液测定的羧基含量为0.01〜0.15摩尔％，浊点为50℃以上。