| 摘要 |
A tertiary carboxyl functional polyester resin obtainable by reaction of: a) at least one aliphatic compound A comprising two aliphatic hydroxyl groups which may each independently be a primary or secondary hydroxyl group and a tertiary carboxyl group; b) optionally one or more hydroxyl compounds B, each compound comprising two aliphatic hydroxyl groups which may each independently be a primary or secondary hydroxyl group; c) at least one cycloaliphatic carboxylic acid compound C comprising two secondary aliphatic carboxyl groups or the anhydride thereof; d) optionally one or more dicarboxylic acid compounds D comprising two aliphatic carboxyl groups or the anhydride thereof; and e) optionally either one or more compounds E comprising one primary or secondary hydroxyl group and optionally a tertiary carboxyl group, or one or more monocarboxylic acid compounds (G) comprising a primary or secondary carboxyl group together with equivalent molecular amounts of one or more compounds (F) selected from the groups for A and B, the molar ratio of compounds (A+B):(C+D):E:F:G being (X-1):X:K:L:M, wherein X ranges from 2 to 14, K ranges from 0 to 2, L ranges from 0 to 2 and M ranges from 0 to the value of L. These polyester resins may be used together with a suitable curing agent for the production of powder coatings, or may be converted into the corresponding glycidylesters, which in combination with a suitable curing agent can be used for the production of powder coatings. |
