公开(公告)号：DE1570238A1

公开(公告)日：1970-02-12

申请号：DE1570238

申请日：1965-01-16

Applicant: BASF AG

Inventor： BUCHHOLZ DR KARL ,  GROHMANN DR JOHANNES ,  MOELLER DR ROLF ,  STAHNECKER DR ERHARD

IPC: C08F291/00 ,  C08J9/00 ,  C08J9/20 ,  C08F1/11

Abstract: 1,126,913. Expandable styrene polymers. BADISCHE ANILIN- & SODA-FABRIK A.G. 14 Jan., 1966 [16. Jan., 1965], No. 1819/66. Headings C3C and C3P. Particulate expandable styrene polymers are produced by polymerizing styrene with or without one or more olefinically unsaturated monomeric polymerizable compounds in aqueous suspension in the presence of an expanding agent and 0À001 to 1% by weight on the monomers of a water-insoluble polymer of a vinyl ester, vinyl ether, acrylic ester or methacrylic ester of molecular weight 10 4 to 10 6 which will dissolve in the monomers and which is not homogeneously miscible with the styrene polymers obtained. In examples styrene, with optionally acrylonitrile, was polymerized in an aqueous mixture of a copolymer of N-vinylpyrrolidone and methyl acrylate, sodium pyrophosphate, benzoyl peroxide; pentane, hexane, butane and/or dichlorofluoromethane; and either polyvinyl isobutyl ether, polymethyl acrylate or methacrylate, poly-2-ethylhexyl acrylate, polyvinyl acetate, a butyl acrylate/vinyl acetate copolymer, polyethyl acrylate or polyvinyl propionate.

公开(公告)号：DE1669673A1

公开(公告)日：1970-10-01

申请号：DE1669673

申请日：1966-11-22

Applicant: BASF AG

Inventor： ERHARD STAHNECKER DR ,  MOELLER DR ROLF

IPC: C08J9/16 ,  C08F33/02