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US 4,048,135 AGranted
Polyester molding compositions of reduced flammability
AssigneeBASF SE
InventorsRolf Wurmb, Bernd Leutner, Wolfgang Seydl, Hans-Ulrich Schlimper, Hans-Josef Sterzel
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Abstract
Thermoplastic, linear, saturated polyesters containing flameproofing agents consisting of halogen compounds and an antimony trioxide which has been prepared in an aqueous suspension of an inorganic support using an aqueous antimony(III) halide solution and adding an aqueous solution of a base to raise the pH to from 6 to 8 with precipitation of the antimony compound onto the support, followed by separation of the solids from the aqueous phase.
Claims6
Thermoplastic molding composition composed of
- A. a linear saturated polyester, and
- B. from 6 to 30% by weight, based on the total weight of the molding composition, of a flameproofing additive of an organic halogen compound and antimony trioxide,
- said antimony trioxide having been precipitated onto a support from an aqueous antimony (III) halide solution by the addition of an aqueous solution of a base to increase the pH to from 6 to 8, followed by isolation of the solids from the aqueous phase, said support
Dependencies are inferred from the claim text.