| 摘要 |
<p>A thermosetting coating composition, of controlled rheology, or a urethane polymer that cures into a durable, flexible coating is the subject of this invention; the filmforming constituents of the coating composition are (1) and organic polyisocyanate, and(2) a polymer that has a backbone of polymerized ethy lenically unsaturated monomers and has attached directly to its backbone ester groups of the following structure - ? - O - R1 - OH and or an isomer thereof, wherein R1, R2 and R3 are hydrocarbon radicals; and the rheology control agents are fumed silica, attapulgus clay, copolymers of acrylonitrile/methyl acrylate of high nitrile content, modified microgels and the like. This novel coating composition is particularly useful, especially when applied over zinc rich primers, as a high quality industrial finish and can be used to paint autos, trucks, aircraft, railway equipment and the like.</p> |
