A process for improving the size distribution of granules formed during synthesis of polyvinyl butyral which involves delaying addition of surfactant to the reaction medium in which the polyvinyl butyral is being formed until after gel break. The surfactant is usually polyacrylic acid or a copolymer of acrylic acid with up to 20 weight percent of one or more copolymerized monomers, in an amount effective to counteract excessive agglomeration of the polyvinyl butyral granules.
申请公布号
DE69219708(D1)
申请公布日期
1997.06.19
申请号
DE1992619708
申请日期
1992.09.08
申请人
MONSANTO CO. (N.D.GES.D.STAATES DELAWARE), ST. LOUIS, MO., US
发明人
REEJHSINGHANI, NANDLAL SANMUKHDAS, LONGMEADOW, MASSACHUSETTS 01106, US