Process for producing filler-containing polypropylene resin comp

Details Process for producing filler-containing polypropylene resin comp Process for producing filler-containing polypropylene resin comp

1988-04-13

1989-09-19

Bleutge, John C.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

523213, 523351, 524517, 524523, C08K 906

Patent

active

048682268

ABSTRACT:
A process for producing a filler-containing polypropylene resin composition is 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 compositon exhibits excellent finishing properties, such as adhesion, coating properties, and printability, as well as improved rigidity and thermal properties.

REFERENCES:
patent: 4686257 (1987-08-01), Mitsuno et al.

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