Method for improving the processing characteristics of polyethylene blends
US5073598A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 21, 1989 |
| Grant date | Dec 17, 1991 |
| Priority date | — |
| Expiry date | Jun 21, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2323/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for improving the processing characteristics of a polyethylene blend comprised of at least two polyethylene components having at least one dissimilar rheological property. The method comprises the steps of (a) establishing a functional relationship between free radical generator dosage and a rheological property for at least one polyethylene component of the polyethylene blend; (b) determining a free radical generator dosage from said relationship for use with at least one polyethylene component, said dosage level sufficient to enable the polyethylene component so treated to exhibit a rheological property substantially similar to that of all components present in the blend; (c) treating at least one polyethylene component at the dosage of free radical generator determined in step (b); and (d) blending the polyethylene components in melt form. A process for the extrusion of films from blends of polyethylenes is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.