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公开(公告)号：DE2213623A1
公开(公告)日：1973-09-27
申请号：DE2213623
申请日：1972-03-21
Applicant: BASF AG
Inventor： HIRSCH GUENTER DR , HAUK ALFRED DR
Abstract: In Parent Patent, the flowability of vinyl chloride homo- and copolymer powders, prepd. by aq. suspension polymerisation, is improved by mixing the powdery polymers after sepn. from aq. polymsn. liquid, but before drying, with 0.0001 - 0.05 wt.% of a surface active agent, sprayed onto polymer powder as a dilute aq. soln. In present modification, the active surface agent is condensed on polymer powder by steam disn. before or after drying.
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