| 摘要 |
<p>This invention relates to a suspension polymerization process for polymerizing vinyl monomers in a reaction vessel equipped with an external cooling means, such as a reflux condenser, as well as a cooling jacket, wherein polymer buildup in said external cooling means can be substantially eliminated. This is accomplished by continuously or intermittently adding to the reaction mixture nonionic surface active or wetting agents having a hydrophile-lipophile balance (HLB) in the range of from about 9 to about 16 thus resulting in reducing charge expansion and attendant reduction in foaming of the charge.</p> |
