Extrusion coating compositions and method
US6551662B1 · kind B1 · utility
8Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 8, 2000 |
| Grant date | Apr 22, 2003 |
| Priority date | — |
| Expiry date | Aug 8, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31786
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Solid extrusion coating compositions for metal substrates, a method of extrusion coating a metal substrate, and a metal article are disclosed. The extrusion coating composition is a thermoplastic material and comprises: (a) a polyester having a weight average molecular weight of about 10,000 to about 50,000, and optionally, (b) a modifying resin, such as an epoxy resin having an epoxy equivalent weight of about 500 to about 15,000. The extrusion coating composition is applied to a metal substrate in an extrusion process to provide a composition film having a thickness of about 1 to about 40 microns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.