Graft modified ethylene/.alpha.-olefin copolymer composition
US5834557A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 1997 |
| Grant date | Nov 10, 1998 |
| Priority date | — |
| Expiry date | Jun 11, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2314/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An ethylene/.alpha.-olefin copolymer composition including (I) a graft-modified ethylene/.alpha.-olefin copolymer composition and (II) a polyolefin. The graft-modified composition is prepared by graft copolymerizing an ethylene/.alpha.-olefin copolymer with a polar monomer. The ethylene/.alpha.-olefin copolymer composition includes first and second ethylene/.alpha.-olefin copolymers. The copolymers are each prepared in the presence of a polymerization catalyst containing (a) an organoaluminum oxy compound and (b) for the first ethylene/.alpha.-olefin copolymer at least two kinds, and for the second ethylene/.alpha.-olefin copolymer one kind, of compounds of Group IV transition metals of the periodic table containing a ligand having a cyclopentadienyl skeleton. The graft-modified ethylene/.alpha.-olefin copolymer composition is blended with a polyolefin, such as by mechanical or solution blending, at a weight ratio (I) to (II) of 1:99 to 99:1. The copolymer compositions have excellent moldability and heat stability properties and form films having high transparency and mechanical strength and good adhesion to polar materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.