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US 4,786,671 AGranted
Flameproofing agent combinations and their use in thermoplastic moulding compositions of polycarbonates and ABS polymers
AssigneeBayer Aktiengesellschaft
InventorsHans-Jurgen Kress, Friedemann Muller, Horst Peters, Christian Lindner, Josef Beukers
Life of this patent
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Abstract
The present invention relates to new flameproofing agent combinations of bisphthalimides and tetrafluoroethylene polymers and their use for providing thermoplastic moulding compositions of halogenated polycarbonates and ABS polymers with a flame-repellent finish.
Claims35
Flameproof agent combination consisting of
- (a) 0.5 to 2.5 parts by weight of a bisphthalimide of the formula (Ia) ##STR5## or of the formula (Ib) ##STR6## wherein X denotes hydrogen or halogen and
- R denotes hydrogen, a C.sub.1 -C.sub.4 -alkyl, a C.sub.5 -C.sub.6 -cycloalkyl or an optionally substituted C.sub.6 -C.sub.30 -aryl group, and
- (b) 0.05 to 1 part by weight of a tetrafluoroethylene polymer.
Flameproofing agent combination consisting of
- (a) 0.5 to 2.5 parts by weight of a bistetrachlorophthalimide or a bisphthalimide based on o-, m- or p-xylylenediamine of the formulae (Ia,1,2,3) ##STR7## wherein X denotes either hydrogen or chlorine, and (b) 0.05 to 1 part by weight of a tetrafluoroethylene polymer.
A flameproofing agent combination according to claim l, in which the tetrafluroethylene polymer has a weight average molecular weight Mw of between 10.sup.5 and 10.sup.6.
Dependencies are inferred from the claim text.