| 摘要 |
Vinyl chloride is suspension polymerized in the presence of a catalyst selected from the group consisting of dialkyl peroxy dicarbonate, azo-bis-2,4-dimethyl valeronitrile, azo-bis-2,4,4-trimethyl valero nitrile, azo-bis-4-methoxy-2,4-dimethyl valeronitrile, and acetyl cyclohexyl sulfonyl peroxide, a suspending agent, a fatty alcohol having from eight to 18 carbon atoms and sorbitan oleate. When the rate of conversion reaches at least 50 percent, an organic reducing agent is added to the polymerization system. A polyvinyl chloride having superior particle size distribution, plasticizer absorption, fish eye, initial color and thermal stability is produced. |
