Polypropylene resin composition and injection-molded article
US6320009A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 1999 |
| Grant date | Nov 20, 2001 |
| Priority date | — |
| Expiry date | Jan 26, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2314/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides a polypropylene-based resin composition which is light weighing, has a very high values of stiffness and heat resistance, exhibits superior scratchproof property and is superior in the processibility with better flowability upon molding thereof, especially that can favorably be used for injection molding. The polypropylene-based resin composition according to the present invention is constituted predominantly of polypropylene and has the following characteristic features A and B: PA1 A: a melt flow rate (MFR), determined at 230.degree. C. under a load of 2.16 kg, in the range of 5-50 g/10 min. and PA1 B: a content of a high molecular weight polypropylene having an intrinsic viscosity [.eta.] of 9-13 dl/g in the range of 15-30% by weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.