Fiber-reinforced thermoplastic resin composition

Abstract

Abstract PURPOSE:A composition having improved heat distortion temperature, improved moisture-absorption characteristics and stress cracking, and high rigidity with keeping a large amount of polypropylene, obtained by blending a specific modified polypropylene with a specified polyamide and a fiber-reinforcing agent. CONSTITUTION:(A) 40-60wt% modified polypropylene showing 1.5-2.0dl/g intrinsic viscosity in decalin at 135 deg.C, onto which an unsaturated carboxylic acid or its derivative is partially or totally grafted (a grafted amount of unsaturated carboxylic acid is 0.001-0.04mg equivalent/g modified polypropylene), is blended with (B) 60-40wt% polyamide having 1.5-2.4 relative viscosity measured in 1wt% solution in 96wt% sulfuric acid at 25 deg.C, and (C) 20-200pts.wt. fiber-reinforcing agent based on 100pts.wt. components A+B. The component A is obtained by grafting maleic acid, etc. onto propylene homopolymer having 0.89- 0.93g/cm<3> density, and used.

Inventors

• 👤 Shinro Katsura
• 👤 桂　真郎

Bibliographic Details