Flame retardant thermoplastic resin composition containing...

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...

Reexamination Certificate

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C524S127000, C524S136000, C524S141000

Reexamination Certificate

active

06838497

ABSTRACT:
The present invention relates to a flame retardant thermoplastic resin composition that comprises (A) about 40 to 95 parts by weight of a rubber modified styrene-containing resin, (B) about 5 to 60 parts by weight of polyphenylene ether resin, (C) about 2 to 30 parts by weight of a styrene-containing copolymer resin having about 5 to 18 % by weight of acrylonitrile in the copolymer per 100 parts by weight of the sum of (A) and (B), (D) about 0.5 to 20 parts by weight of an oxaphospholane compound per 100 parts by weight of the sum of (A) and (B), and (E) about 0 to 30 parts by weight of a phosphoric acid ester compound per 100 parts by weight of the sum of (A) and (B).

REFERENCES:
patent: 4022826 (1977-05-01), Lohmar et al.
patent: 4081463 (1978-03-01), Birum et al.
patent: 4113669 (1978-09-01), Zondler et al.
patent: 4503178 (1985-03-01), Green
patent: 4769182 (1988-09-01), Hazen
patent: 5334760 (1994-08-01), Wachi et al.
patent: 7-48491 (1995-02-01), None
patent: 1999-28442 (2001-02-01), None
patent: 1999-28443 (2001-02-01), None
Costa, L. et al. “Flame-retardant Properties of Phenol-Formaldehyde-Type Resins and Triphenyl Phosphate in Styrene-Acrylonitrile Copolymers”, Journal of Applied Polymer Science, vol. 68, p. 1067-1076 (1998).
Translation of claims of JP Application No. 7-48491 published Feb. 21, 1995.
Translation of claims of KR Application No. 1999-28442 published Feb. 5, 2001.
Translation of claims of KR Application No. 1999-28443 published Feb. 5, 2001.

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