| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a coating compsn. for metal coils such as steel, aluminum, alumite and rolled metal products. SOLUTION: A crosslinked coil coating polymer based on a perfluoro polyether, which has the arrangement of one or more oxyfluoroalkylene units such as-CF2 CFO-,CR4 R5 CF2 CF2 O- (wherein R4 and R5 may be the same or different and are selected from among H, Cl, F and 1-4C perfluoroalkyl groups), -CF2 CF(CF3 )O- and -CFYO-(wherein Y is F or CF3 ) crosslinked with a block polyisocyanate having a hydroxylic difunctional terminal and at least three NCO groups.</p> |
