Patent ID: 6602637
Filing Date: 2003-08-05
Classification: H01M,Y02E

Abstract:
A secondary battery case comprising:a molded product of a thermoplastic resin composition having a weld zone from a molding process said thermoplastic resin composition comprising: (A) a polyphenylene ether-based resin, (B) a crystalline polypropylene resin which is a homopolymer or a copolymer of polypropylene, and (C) a hydrogenated block copolymer comprising an aromatic vinyl compound polymer block and a conjugated diene compound polymer block, the (A)/(B) ratio by weight being 7/93 to 70/30, the amount of (C) being 2 to 40 parts by weight based on 100 parts by weight of (A) and (B) combined, the melt flow rate of said crystalline polypropylene resin (B) being 0.1 to 10 g/10 min as measured at 230Â° C. and under a load of about 21.17 N, the density of the propylene polymer moiety in said crystalline polypropylene resin being not less than 0.906 g/cm3.