Claims
- 1. A process for producing a filler-containing polypropylene resin composition comprising:
- (a) from 27 to 87% by weight of a polypropylene resin,
- (b) from 3 to 15% by weight of a second polypropylene resin containing from 0.1 to 3 mol % of at least one unsaturated dicarboxylic acid anhydride repeating unit selected from maleic anhydride, citraconic anhydride, itaconic anhydride, or tetrahydrophthalic anhydride,
- (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 whose surface has been treated with from 0.1 to 1.5 parts by weight, per 100 parts by weight of said filler, of an organosilane compound, which process comprises melt-mixing the components (a), (b), and (d) to obtain a composition in a first step and then melt-mixing the resulting composition with the component (c).
Priority Claims (2)
Number |
Date |
Country |
Kind |
61-97593 |
Apr 1986 |
JPX |
|
61-111283 |
May 1986 |
JPX |
|
Parent Case Info
This is a division of application Ser. No. 041,514, filed Apr. 23, 1987, now U.S. Pat. No. 4,764,546.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4686257 |
Mitsuno et al. |
Aug 1987 |
|
Divisions (1)
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Number |
Date |
Country |
Parent |
041514 |
Apr 1987 |
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