Granulated or pelletized compositions of grafting units
US6454980B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2000 |
| Grant date | Sep 24, 2002 |
| Priority date | — |
| Expiry date | Apr 25, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2312/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A granulated or pelletized composition of propylene homo and copolymers onto which are grafted grafting units of vinylpolybutadiene and further grafting units selected from polyalkenylenes, EPM and EPDM polymers, and mixtures thereof. The composition has a Shore D hardness value equal to or less than 35 and a fogging value equal to or greater than 90%. The composition is suitable for injection molding. A method of producing the granulated or pelletized composition comprising forming the composition by mixing the propylene homo and copolymers, vinylpolybutadiene grafting units and further grafting units with peroxide radical initiators, extruding the composition under heat and granulating the extruded polymer composite. An interior car door panel or interior car trim element having an outer skin made of granulated or pelletized forms of the composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.