Primer coating for metallized gas barrier films
US9303179B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 1, 2013 |
| Grant date | Apr 5, 2016 |
| Priority date | — |
| Expiry date | Apr 25, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31699
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A primer coating is provided for use on polymeric substrates to enhance the adhesion of metallized coatings to the substrates. The primer coating also improves the gas barrier properties of the substrate when used in combination with a metallized coating. The primer coating includes an amorphous polyvinyl alcohol, polyethyleneimine, and optionally, an aqueous dispersion of polyurethane. The primer coating may be applied to a variety of polymeric substrates including polylactic acid, polyethylene terephthalate, biaxially oriented polyethylene terephthalate, oriented polypropylene, biaxially oriented polypropylene, and biaxially oriented polyamide. When used in combination with the subsequently applied metallized coating, an oxygen transmission rate of about 0.1 and 5.0 cc/m2/day at 0% relative humidity is achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.