Polypropylene compounds with enhanced haptics
US9580586B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2014 |
| Grant date | Feb 28, 2017 |
| Priority date | — |
| Expiry date | Jul 10, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K7/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polymeric composition is a blend of one or more heterophasic copolymers of propylene and ethylene produced by a multistep polymerization, wherein the heterophasic copolymers comprise a low crystalline matrix component and a soft amorphous elastomeric component, in which both the matrix component and the soft amorphous elastomeric component contain greater than 55% by weight propylene; one or more additional elastomeric components selected from the group of an ethylene/α-olefin C3-C20 copolymer with a total ethylene concentration of greater than or equal to 65% by weight; and a propylene/α-olefin C2, C4-C20 copolymer with a total propylene concentration of greater than or equal to 65% by weight; 5-65% by weight of the total composition of one or more inorganic or organic reinforcement materials; and 0.01-4% by weight of the total composition of a maleic anhydride grafted polypropylene compatibilizer or coupling agent. The polymeric composition has a low crystallinity of less than 30 J/gram measured by DSC. The total elastomer content of the polymeric composition is greater than 50% by weight, and the overall polymeric composition has an ethylene concentration of greater than 10% b…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.