Linear low density ethylene polymers blended with modified linear low density ethylene polymers
US4614764A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 1985 |
| Grant date | Sep 30, 1986 |
| Priority date | — |
| Expiry date | Mar 6, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L51/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The properties of linear ethylene polymers, especially linear, low density polyethylene (LLDPE), are improved by adding a chemically modified ethylene polymer to the base resin. The modification is brought about by the use of a free radical generator, preferably an organic peroxy compound such as benzoyl peroxide, optionally with an unsaturated silane such as vinyl trimethoxy silane. The use of the modified resin masterbatch enhances the crystallization of the polymer and improves the melt strength of the polymer, providing greater bubble stability in the blown tubular film extrusion process so that higher operating speeds may be employed. In addition, the films produced from the blends have improved antiblocking properties without significant deterioration of mechanical properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.