Propylene-based polymer composition and foamed article thereof
US6110986A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1998 |
| Grant date | Aug 29, 2000 |
| Priority date | — |
| Expiry date | Dec 10, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2314/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A propylene-based polymer composition obtained by polymerizing a propylene monomer in the presence of a stereoregular olefin polymerization catalyst system in the first stage to produce a crystalline propylene-based polymer(A) having an intrinsic viscosity of 5 dl/g or more, and successively polymerizing a propylene monomer in the second stage to produce a crystalline propylene-based polymer(B) with an intrinsic viscosity of less than 3 dl/g, wherein the content of the (A) is in the range of 0.05% by weight or more and less than 35% by weight in the total of the polymers(A) and (B), and the total of the polymers(A) and (B) has an intrinsic viscosity of less than 3 dl/g and a Mw/Mn of less than 10, and the foamed article thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.