The invention relates to radiation curable compositions which are particularly suitable for the production of three-dimensional shaped articles by means of stereolithography, to a process for the production of a cured product and, in particular, for stereolithographic production of three dimensional shaped articles from this composition having excellent moisture resistance.
The radiation curable composition of the invention comprises relative to the total weight of the composition
A 0-29 wt.% of a cationically curable component having a linking aliphatic ester group, preferably component A comprises two cyclohexene oxide groups
B 10-85 wt.% of an epoxy group containing component other than A
C 1-50 wt.% of an oxetane group containing component
D 1-25 wt.% of a multifunctional acrylate
E a radical photoinitiator
F a cationic photoinitiator,
wherein the amount of components having linking aliphatic ester groups is preferably less than 100 meq of ester links/100 g of composition, more preferably the amount of components having linking aliphatic ester groups is less than 25 meq of ester links/100 g of composition.
本发明涉及特别适用于通过立体光刻法生产三维异形制品的辐射固化组合物,涉及生产固化产品的工艺,特别是用这种组合物进行立体光刻法生产具有优异防潮性能的三维异形制品的工艺。
相对于组合物的总重量,本发明的辐射固化组合物包括
A 0-29 重量百分比的具有连接脂肪族酯基的阳离子固化成分,最好成分 A 包含两个
环己烯氧化基团
B 10-85 重量百分比的含环氧基团的组份(A 除外
C 1-50 重量百分比的含有氧杂
环丁烷基团的组分
D 1-25 重量百分比的多功能
丙烯酸酯
E 自由基光
引发剂
F 一种阳离子光
引发剂、
其中,具有连接脂肪族酯基的组分的量最好少于 100 兆克酯链/100 克组合物,具有连接脂肪族酯基的组分的量最好少于 25 兆克酯链/100 克组合物。