申请人:SHELL INTERNATIONALE RESEARCH
MAATSCHAPPIJ B.V.
公开号:EP0720997A2
公开(公告)日:1996-07-10
Linear, tertiary carboxyl functional polyester resins suitable for the production of coatings having excellent outdoor durable properties, the polyester resins obtainable by reaction of
a) at least one aromatic and/or cycloaliphatic carboxylic acid compound A comprising two aromatic- and/or secondary aliphatic carboxyl groups or the anhydride thereof,
b) at least one hydroxyl compound B comprising two aliphatic hydroxyl groups, which groups each independently may be primary or secondary hydroxyl groups,
c) at least one hydroxyl substituted carboxylic acid compound C comprising at least one tertiary aliphatic carboxyl group and two aliphatic hydroxyl groups, which groups each independently may be primary or secondary hydroxyl groups, and
d) optionally one carboxylic acid compound D comprising one carboxyl group,
the molar ratio of compounds A:B:C:D being(X+Y-1):X:Y:Z, wherein X ranges from 2 to 8, Y ranges from 2 to 8, and Z ranges from 0 to 2.
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.
线性叔羧基官能团聚酯树脂适用于生产具有优异户外耐久性能的涂料,这些聚酯树脂可通过以下反应获得
a) 至少一种芳香族和/或环脂族羧酸化合物 A,包含两个芳香族和/或仲脂族羧基或其酸酐、
b) 至少一种由两个脂肪族羟基组成的羟基化合物 B,这两个羟基可分别独立地为伯羟基或仲羟基、
c) 至少一种羟基取代的羧酸化合物 C,包含至少一个三级脂肪族羧基和两个脂肪族羟基,这两个羟基可各自独立地为一级或二级羟基,以及
d) 可选一种包含一个羧基的羧酸化合物 D、
化合物 A:B:C:D 的摩尔比为(X+Y-1):X:Y:Z,其中 X 为 2 至 8,Y 为 2 至 8,Z 为 0 至 2。
这些聚酯树脂可与适当的固化剂一起用于生产粉末涂料,也可转化为相应的缩水甘油酯,与适当的固化剂一起用于生产粉末涂料。