Gas-barrier coated films, sheets or foils and method of preparation
US4104438A · kind A · utility
17Cited by
4References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1975 |
| Grant date | Aug 1, 1978 |
| Priority date | — |
| Expiry date | Nov 12, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31736
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Films, sheets or foils are given a gas-barrier coating of an aromatic polyamide, polyimide, polyamide-imide, polyhydrazide, polyamide-hydrazide, or polyazomethine by direct vapor-phase condensation polymerization of their respective monomers. The monomers are introduced in an inert diluent gas, mixed and reacted in the presence of the surface to be coated. The surface is maintained above the critical minimum deposition temperature of the monomers but below about 300.degree. C. The coating is formed to a thickness between about 0.1 and 0.6 mil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.