US 5,474,853 AGranted

Resin composition, molded article and lamp reflector

AssigneeMitsubishi Gas Chemical Company, Inc.

InventorsNoriyoshi Watanabe, Kazuo Yamamiya

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Abstract

A resin composition comprising predetermined amounts of a specific polyamide resin (A), a modified polyphenylene ether resin (B), a fibrous inorganic filler (C) having an average fiber-diameter of 10 .mu.m or less, a powdery inorganic filler (D) having an average particle diameter of 10 .mu.m or less, an epoxy resin (E) and a copper compound (F-1) and/or a powdery phenolic resin (F-2); a molded article formed from the resin composition; and a lamp reflector formed from the molded article. The molded article formed from the above resin composition can give an automotive lamp reflector excellent in resistance to heat generated when a lamp is on, rigidity at high temperatures, clear reflection performance on a mold article surface, adhesion to deposited aluminum and adhesion to a primer coating composition.

A lamp reflector which has a reflection surface coated with metal and is obtained by molding the resin composition comprising:

(1) an MX nylon which is formed from xylylenediamine and an .alpha., .chi.-linear aliphatic dibasic acid having 6 to 12 carbon atoms and has a number average molecular weight of 14,000 to 25,000 (component A-1),
(2) a modified polyphenylene ether resin (component B),
(3) a fibrous inorganic filler having an average fiber diameter of 10 .mu.m or less (component C),
(4) a powdery inorganic filler having an average particle diameter of 10 .mu.m or less (component D),
(5) an epoxy resin (component E), and
(6) a copper compound (component F-1) and/or a powdery phenolic resin (component F-2),
(i) the resin composition containing 50 to 95% by weight of the MX nylon (component A-1) and 50 to 5% by weight of the modified polyphenylene ether resin (component B),
(ii) the resin composition containing, per 100 parts by weight of the total amount of the MX nylon (component A-1) and the modified polyphenylene ether resin (component B), 5 to 60 parts by weight of the fibrous inorganic filler (component C), 20 to 180 parts by weight of the powdery inorganic filler (component D), 0.5 to 6 parts by weight of the epoxy resin (component E), and 0.1 to 6 parts by weight of the copper compound (component F-1), and/or 0.5 to 20 parts by weight of the powdery phenolic resin (component F-2) and wherein the modified polyphenylene ether resin (component B) is a resin obtained by modifying a polyphenylene ether resin with at least one modifying agent selected from the group consisting of the following (a) to (f):
(a) an unsaturated aliphatic carboxylic acid or an acid anhydride thereof,
(b) a phenol or phenol derivative, a carboxylic acid, an alcohol, an amine or an aromatic hydrocarbon-formaldehyde resin modified with an aromatic hydrocarbon,
(c) a liquid diene compound,
(d) an epoxy compound,
(e) a compound whose molecule has (i) an ethylenically unsaturated double bond or a triple bond and (ii) a carboxyl, acid anhydride, acid amide, imide, carboxylic acid ester, amino or hydroxyl group, and
(f) an oxypolycarboxylic acid.

11 more elements

Abstract

Claims6