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.
May 4, 1982
Date of Patent:
September 18, 1984
Societe Chemique des Charbonnages--CdF Chimie