Metal coated with a layer of polymer film and a process for its production
US4472475A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 4, 1982 |
| Grant date | Sep 18, 1984 |
| Priority date | — |
| Expiry date | May 4, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31692
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Metal coated with a polymer film having a thickness between 10 and 500 .mu.m. The film is a terpolymer comprising 88 to 98.7 mole % of units derived from ethylene, from 1 to 10 mol % of units derived from an alkyl (meth)-acrylate, and from 0.3 to 3 mol % of units derived from maleic anhydride, and optionally may contain up to 5 mol % of units derived from a fourth monomer selected from .alpha.-olefins having from 3 to 8 carbon atoms, monoalkyl maleates and dialkyl maleates in which the alkyl groups have from 1 to 6 carbon atoms, vinyl acetate, and carbon monoxide. The terpolymer film has a melt index of between 2 and 10 dg/minute. The metal substrate is coated with the terpolymer film at a temperature between 140.degree. C. and 300.degree. C., the speed of travel of the metal substrate being between 40 to 400 meters per minute.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.