| 摘要 |
A film-forming, radiation-polymerizable, paint binder solution of vinyl monomers and an alpha-beta olefinically unsaturated, polysiloxane-modified polyester is applied as a liquid coating to an external surface of an article of manufacture and cured thereon with ionizing radiation. The resultant binder resin contains about 0.5 to about 5, preferably about 0.5 to about 3, alpha-beta olefinic unsaturation units per 1,000 units molecular weight. In one embodiment, the binder resin is formed by reacting a siloxane bearing at least two functional groups selected from hydroxy groups and hydrocarbonoxy groups with a polyhydric alcohol and subsequently reacting the siloxane-containing intermediate with a dicarboxylic acid which provides the resultant polymer with alpha-beta olefinic unsaturation and a second carboxylic acid that provides no additional alpha-beta olefinic unsaturation to the resulting polymer. In a second embodiment, the polyester is formed first by reacting the aforementioned polyhydric alcohol with the aforementioned carboxylic acids and subsequently reacting the resulting polymer with the siloxane.
|
