| 摘要 |
A crystalline polyester film or sheet coated with a primer composition consisting essentially of a carboxylated polyurethane, wherein the carboxyl groups are introduced by esterifying the terminal hydroxyl groups and amidizing any terminal amine groups of the polyurethane with a dicarboxylic acid anhydride. Such primer compositions form continuous wet films and dry coatings and provide surfaces receptive to a variety of surface finishes such as further polymer coatings and inks.
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