公开(公告)号：GB1132868A

公开(公告)日：1968-11-06

申请号：GB1248466

申请日：1966-03-22

Applicant: BASF AG

Inventor： WEBER HEINZ ,  BURGER HEINZ ,  DAUMILLER GEUNTHER ,  WILLERSINN HERBERT ,  GROHMANN JOHANNES

IPC: C08K5/01

Abstract: 1,132,868. Self-extinguishing styrene polymer compositions. BADISCHE ANILIN- & SODAFABRIK A.G. 22 March, 1966 [1 April, 1965 (2)], No. 12484/66. Headings C3C, C3G and C3P. A self-extinguishing composition which may be used to produce porous mouldings comprises a styrene polymer, an organic brominated compound and 0À01-5% of 2,3-dimethyl-2,3- diphenylbutane. The polymer may be polystyrene, a copolymer containing at least 50% of styrene and acrylonitrile, or may be prepared by polymerizing styrene in the presence of polybutadiene. The bromine compound may contain at least 4 carbon atoms and more than 40% of bromine, e.g. hexabromocyclododecane or 2,3-tris-(dibromopropyl)-phosphate and the composition may contain at least 0À1% of bromine. In an example, a styrene polymer, an organic bromine compound and 2,3-dimethyl- 2,3-diphenylbutane was dissolved in methylene chloride, pentane was added, the solution was poured on to a glass sheet, the methylene chloride was allowed to evaporate and the sheeting obtained was expanded in steam.