Multilayer polymer materials with barrier properties
US5171640A · kind A · utility
7Cited by
3References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 26, 1990 |
| Grant date | Dec 15, 1992 |
| Priority date | — |
| Expiry date | Nov 26, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31938
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Multilayer polymer material with barrier properties containing a layer (a) of a polymer with barrier properties and a layer (b) of copolymer of styrene and maleic anhydride. The polymer of layer (a) is a copolymer of ethylene and vinyl alcohol and the said material also has a lyer (c) of a copolymer of ethylene containing units derived from an unsatured dicarboxylic acid anhydride and layer (c) is in contact with layer (a).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.