申请人:DAINIPPON INK AND CHEMICALS, INC.
公开号:EP1582548A1
公开(公告)日:2005-10-05
The present invention allows the production of a polymerizable hyperbranched polyester by introducing polymerizable unsaturated double bonds into the molecular terminals of a hyperbranched polyester polyol (A), which is obtained by condensation polymerization a polyhydroxy monocarboxylic acid in which there are at least two hydroxyl groups, the carbon atom adjacent to the carboxy group is saturated carbon atom, and the hydrogen atoms on said carbon atom are all substituted, by reacting the hyperbranched polyester polyol (A) and an alkyl ester of a carboxylic acid having a polymerizable unsaturated double bond (B) by a transesterification in the presence of at least one type of transesterification catalyst (C) selected from the group consisting of a dialkyl tin oxide and a stanoxane, without causing side reactions such as nucleophilic addition reactions of terminal hydroxyl groups to polymerizable unsaturated double bonds of the hyperbranched polyester polyol (A), or thermal polymerization of the polymerizable unsaturated double bonds. The polymerizable hyperbranched polyester can be produced at high efficiency using a transesterification that uses as an alkyl ester of a carboxylic acid having a polymerizable unsaturated double bond (B), which is easily obtained as an industrial raw material, and without altering the original backbone structure of the molecular chains of the hyperbranched polyester polyol (A) by hydrolysis and so forth.
本发明通过在超支化聚酯多元醇(A)的分子末端引入可聚合的不饱和双键来生产可聚合的超支化聚酯,超支化聚酯多元醇(A)是通过缩合聚合多羟基一羧酸得到的,其中至少有两个羟基,与羧基相邻的碳原子是饱和碳原子,并且所述碳原子上的氢原子全部被取代、将超支化聚酯多元醇(A)和具有可聚合不饱和双键的羧酸烷基酯(B)在至少一种酯交换催化剂(C)(选自二烷基氧化锡和链烷氧基)的存在下进行酯交换反应、不引起副反应,如端羟基与超支化聚酯多元醇(A)的可聚合不饱和双键的亲核加成反应,或可聚合不饱和双键的热聚合反应。使用具有可聚合不饱和双键(B)的羧酸烷基酯进行酯交换反应,可高效生产可聚合超支化聚酯,该烷基酯可作为工业原料轻松获得,且不会通过水解等方式改变超支化聚酯多元醇(A)分子链的原始骨架结构。