Laminar articles from a polyolefin matrix, ethylene-vinyl alcohol copolymers and a compatibilizer
US5399619A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 24, 1993 |
| Grant date | Mar 21, 1995 |
| Priority date | — |
| Expiry date | Aug 24, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31938
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The laminar article of the invention comprises a mixture of a polyolefin matrix with a barrier resin of polyethylene-vinyl alcohol copolymer and a compatibilizer selected from an ethylene-ethylenically unsaturated carboxylic acid copolymer such as ethylene methacrylic acid or ethylene acrylic acid, ethylene vinyl acetate, polyethylene vinyl alcohol or mixtures thereof. A process is also claimed for preparing a laminar article with multiple thin, overlapping layers, comprising preparing a melted heterogeneous blend of a polyolefin, an ethylene-vinyl alcohol copolymer, and the above compatibilizer; extending the body of the melt; and cooling the extended body to below the melting point of the polyolefin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.