| 摘要 |
A polyvinyl chloride is produced by suspension polymerization in the presence of two suspension agents, namely (a) 10-90% by weight, based on the mixture, of a carbohydrate ester of a carbohydrate having the following formula <IMAGE> wherein n is a number of 0 to 99 and R is the residue of a di- to hexahydric aliphatic, linear or branched alcohol of 2-12 carbon atoms, and a saturated or unsaturated, linear or branched carboxylic acid of 6-24 carbon atoms, as well as of 90-10% by weight, based on the suspension agent mixture, of a specific cellulose ether or a specific partially saponified polyvinyl alcohol. The resultant polyvinyl chloride exhibits simultaneously the desired properties of very low gel number besides high porosity and high powder density.
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