| 摘要 |
<p>A water-based composition for forming chip-resistant films, e.g. on cars, comprises (A) a modified ethylenical polymer which is obtained from an ethylene monomer and an ethylenically unsaturated monomer containing a carboxyl group and which has been made water-dispersible by the addition of a base, and in which at least the backbone of the ethylenical polymer molecule has carboxyl groups bonded thereto and derived from the ethylenically unsaturated monomer, the total amount of the carboxyl groups being not less than 10% by weight based on the amount of the ethylenical polymer, and (B) a water-based polyurethane resin, the proportion of component (A) to component (B) being from 10/90 to 50/50 by weight. The film may be applied in a process which may comprise electrodeposition, intermediate coating, and topcoating steps, the film being applied to the electrodeposited film or the intermediate-coated film.</p> |
