| 摘要 |
The present invention is to provide a suspending agent for suspension polymerization of a vinyl compound which comprises a polyvinyl alcohol polymer (A) having a degree of hydrolysis of at least 60 mol % and a mercapto group at an end thereof; and furtheremore a suspending agent for suspension polymerization of a vinyl compound which comprises a polyvinyl alcohol polymer (A) having a degree of hydrolysis of at least 60 mol % and a mercapto group at an end thereof and a polyvinyl ester polymer (B) having a degree of hydrolysis of less than 60 mol %, weight ratio of compounent (A) / compounent (B) being 40 / 60 to 95 / 5. The suspending agent for suspension polymerization of a vinyl compound of the the present invention has an excellent less-foaming effect and an effect of giving uniform and porous vinyl polymer granules. |
