Glass fiber reinforced propylene-ethylene copolymer base resin c

Details Glass fiber reinforced propylene-ethylene copolymer base resin c Glass fiber reinforced propylene-ethylene copolymer base resin c

1986-07-31

1987-11-17

Lilling, Herbert J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

523212, 523213, 523214, 523217, 524447, 524450, 524451, 524456, 524504, C08K 340, C08K 714, C08K 906

Patent

active

047075058

ABSTRACT:
A glass fiber reinforced resin composition suitable as an injection molding material for automobile instrument panels. Essentially the resin composition is a blend of 55-77 wt % of a propylene-ethylene block copolymer at least partially modified by graft copolymerization with an unsaturated carboxylic acid or its derivative, 5-15 wt % of an ethylene-propylene rubber in which the content of ethylene is 60-85 wt % and 18-30 wt % of glass fiber having a filament diameter of 8-15 .mu.m. The melt flow index of the modified propylene-ethylene block copolymer and the Mooney viscosity of the ethylene-propylene rubber are strictly specified. The resin composition is pelletized from a melted state such that the glass fiber dispersed in the pellets is not smaller than 550 .mu.m and, preferably, not greater than 1100 .mu.m in mean filament length. This resin composition is good in moldability and provides instrument panels high in rigidity, in heat distortion resistance and also in impact resistance.

REFERENCES:
patent: 4404312 (1983-09-01), Kokubu et al.
patent: 4417019 (1983-11-01), Yamamoto
patent: 4469138 (1984-09-01), Satoh
patent: 4477617 (1984-10-01), Murphy
patent: 4480065 (1984-10-01), Kawai et al.
patent: 4603153 (1986-07-01), Sobajima et al.
patent: 4621115 (1986-11-01), Morita et al.
Patents Abstracts of Japan C-141, Dec. 21, 1982, vol. 6/No. 261; Japanese Patent Disclosure No. 57-155246, Sep. 1982.

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