C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/5016, 400/64
C08L 25/02 (2006.01) C08K 5/03 (2006.01) C08K 5/06 (2006.01) C08L 33/20 (2006.01) C08L 55/02 (2006.01)
Patent
CA 1159982
Abstract of the Disclosure A mixture of brominated oligomeric polystyrenes, having a degree of polymerization of from 3 to 400, and low molecular weight brominated aromatic compounds of the diphenyl ether type is obtained by polymerizing the non- brominated starting materials, in a halohydrocarbon solvent, using a Lewis acid catalyst. The reaction mixture is then brominated and extracted with water to remove hydrogen bromide and catalyst, and the solvent and volatile con- stituents are separated from the product. The bromination is carried out at from -30°C to +130°C. The mixtures of brominated oligomeric polystyrenes and brominated aromatic compounds have a low melt viscosity and are therefore particularly suitable for incorporation, as a flame-proofing agent, into thermoplastics.
371433
Brandstetter Franz
Lindenschmidt Gerhard
Naarmann Herbert
Penzien Klaus
Schulte Wolfgang
Basf Aktiengesellschaft
Robic Robic & Associes/associates
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