Long fiber-reinforced polypropylene resin composition and molded article
US6521693B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 28, 2001 |
| Grant date | Feb 18, 2003 |
| Priority date | — |
| Expiry date | May 5, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/16
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Provided is a long fiber-reinforced polypropylene resin composition which provides a molded article excellent in a mechanical strength and an impact resistance and having a small anisotropy in a strength, so that it can suitably be used even for uses in medium-sized to large-sized molded articles. The long fiber-reinforced polypropylene resin composition comprises 40 to 85% by weight of (A) a long fiber-reinforced propylene homopolymer pellet shown below and 15 to 60% by weight of (B) a propylene base block copolymer resin having the MFR of 50 g/10 min or less:(A): a long fiber-reinforced propylene homopolymer pellet comprising,(A1): 20 to 64.9% by weight of a modified propylene homopolymer obtained by modifying a propylene homopolymer with unsaturated carboxylic acid or an anhydride thereof or a mixture of the above modified propylene homopolymer and an unmodified propylene homopolymer, wherein an MFR is 60 g/10 min or more,(A2): 0.1 to 5% by weight of at least one selected from the group consisting of simple substances, hydroxides and oxides of alkaline earth metals, and(A3): 35 to 75% by weight of glass long fiber having a length of 2 to 50 mm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.