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US 6,174,944 B1Granted
Polycarbonate resin composition, and instrument housing made of it
AssigneeIdemitsu Petrochemical Co., Ltd.
InventorsJiro Chiba, Masahiro Kitayama
Life of this patent
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Abstract
Provided are a flame retardant polycarbonate resin composition and housings of the composition for electric and electronic instruments and appliances. Having good fluidity and good moldability, the composition can be well molded into thin-wall moldings with good appearance. The composition contains additive components of a fibrous filler, a terpene resin, a composite rubber-based graft copolymer, a halogen-free phosphate compound and a polytetrafluoroethylene.
Claims9
A polycarbonate resin composition, comprising a combination of:
- (a) from 50 to 80% by weight of a polycarbonate resin having a viscosity average molecular weight ranging from 14,000 to 40,000;
- (b) from 1 to 50% by weight of a fibrous filler;
- (c) from 2 to 8% by weight of a terpene resin;
- (d) from 2 to 8% by weight of a composite rubber-based graft copolymer;
- and
- (e) a halogen-free phosphate compound in an amount ranging from 0.8 to 1.2 times the total weight of said terpene resin and said composite rubber-based graft copolymer, to which is added (f) from 0.05 to 1.0 part by weight, relative to 100 parts by weight of the total of (a), (b), (c), (d) and (e), of a polytetrafluoroethylene.
3 more elements
Dependencies are inferred from the claim text.