Halogen-free flameproof molding materials

Patent 4914144 Issued on April 3, 1990. Estimated Expiration Date:

December 16, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Thermoplastic polycarbonate moulding compositions Patent #: 4692488
Issued on: 09/08/1987
Inventor: Kress , et al.

Inventors

Assignee

BASF Aktiengesellschaft

Application

No. 285662 filed on 12/16/1988

US Classes:

524/139, Phosphorus directly bonded to at least one O and at least one H or C only524/141, Aryl group524/145-C-O-P-O-C, or C-O-P-OH group, e.g., phosphate ester, lecithin, etc.

Examiners

Primary: Hoke, Veronica P.

Attorney, Agent or Firm

Oblon, Spivak, McClelland, Maier & Neustadt

Foreign Patent References

0146023 EP. 06/13/1985
3523316 DE. 01/13/1987
1459648 GB. 12/13/1976

International Class

C08K 005/53

Foreign Application Priority Data

1987-12-17 DE

Abstract

A flameproof, halogen-free thermoplastic molding material contains, based on the molding material consisting of A, B, C, D and E,(A) 40 to 95% by weight of a thermoplastic halogen-free aromatic polycarbonate based on a diphenol,(B) from 5 to 30% by weight of one or more halogen-free graft polymers obtained from, based on B,(b1) an elastomer (rubber), which accounts for from 40 to 80% by weight, and(b2) a graft shell on this elastomer which accounts for from 20 to 60% by weight,(C) from 5 to 50% by weight of one or more halogen-free thermoplastic copolymers consisting of, based on C, from 50 to 95% by weight of styrene, ଱-methylstyrene, styrene which is substituted in the nucleus, methyl methacrylate or a mixture of these, and from 50 to 5% by weight of (meth)acrylonitrile, methyl methacrylate, maleic anhydride, N-substituted maleimide or a mixture of these,(D) 1 to 25% by weight of one or more halogen-free phosphorus compounds of the formula ##STR1## where R1, R2 and R3 independently of one another are each halogen-free C1 -C8 -alkyl or halogen-free C6 -C20 -aryl and n is 0 or 1, and(E) from 0.05 to 5% by weight of a tetrafluoroethylene polymer. In the molding material, the elastomer (b1) is prepared by polymerizing a monomer mixture of (b1 a1) from70 to 99.9% by weight, based on b1), of one or more alkyl acrylates where alkyl is of 1 to 8 carbon atoms,(b1 a2) from 0 to 30% by weight, based on (b1), of one or more further copolymerizable monoethylenically unsaturated monomersand b1 a3) from 0.1 to 5% by weight, based on B1), of a copolymerizable polyfunctional, crosslinking monomer.The molding material is used for the production of shaped articles.