Filler-containing polypropylene resin composition and process fo

Details Filler-containing polypropylene resin composition and process fo Filler-containing polypropylene resin composition and process fo

1987-04-23

1988-08-16

Bleutge, John C.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524449, 524451, 524504, 524517, 525 74, 525207, C08K 334, C08K 906, C08L 3500

Patent

active

047645466

ABSTRACT:
A filler-containing polypropylene resin composition and a process for producing the same are disclosed. The composition comprises (a) from 27 to 87% by weight of a polypropylene resin, (b) from 3 to 15% by weight of a modified polypropylene resin containing from 0.1 to 3 mol % of an unsaturated dicarboxylic acid anhydride repeating unit, (c) from 5 to 30% by weight of an ethylene copolymer composed of from 82 to 98.7 mol % of an ethylene repeating unit, from 1 to 15 mol % of an ester repeating unit selected from alkyl acrylates and alkyl methacrylates having from 1 to 8 carbon atoms in the alkyl moiety thereof, and from 0.3 to 3 mol % of an unsaturated dicarboxylic acid anhydride repeating unit, and (d) from 5 to 40% by weight of a filler. The process comprises melt-mixing the components (a), (b) and (d) and then melt-mixing the resulting mixture with the component (c). The resin composition exhibits excellent finishing properties, such as adhesion, coating properties, and printability, as well as improved rigidity and thermal properties.

REFERENCES:
patent: 3483276 (1969-12-01), Mahlman
patent: 3746676 (1973-07-01), Joyner et al.
patent: 3886227 (1975-05-01), Van Brederode et al.
patent: 4604421 (1986-08-01), Mitsuno et al.
patent: 4621115 (1986-11-01), Morita et al.
patent: 4663369 (1987-05-01), Kawai et al.
patent: 4686257 (1987-07-01), Mitsuno et al.

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