Polyolefin blends containing reactive agents
US4737547A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 11, 1986 |
| Grant date | Apr 12, 1988 |
| Priority date | — |
| Expiry date | Jun 11, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2312/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polyolefin blend comprising, in physical admixture, a major portion of particles of a first polyethylene and a minor portion of particles of a composition of a second polyethylene, is disclosed. The first polyethylene is selected from the group consisting of homopolymers of ethylene and copolymers of ethylene and at least one C.sub.4 -C.sub.10 higher alpha-olefin, and the second polyethylene is a copolymer of ethylene and at least one C.sub.4 -C.sub.10 higher alpha-olefin having a density of at least 0.890 g/cm.sup.3, especially at least 0.910 g/cm.sup.3, and a melt index of at least 40 dg/min. The density of the second polyethylene is at least about 0.005 g/cm.sup.3 lower than that of the first polyethylene and the melt index of the second polyethylene is at least 10 dg/min. higher than that of the first polyethylene. The composition of the second polyethylene contains an agent that is capable of reacting with polyolefins that are in a molten state. Such agents are selected from the group consisting of cross-linking agents and modifying agents, and mixtures thereof. In an alternative embodiment, the second polyethylene has a shear viscosity that is not more than 30% of that of t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.