申请人:MITSUBISHI CHEMICAL CORPORATION
公开号:EP1275668A1
公开(公告)日:2003-01-15
The present invention has an object of providing a photocurable composition which can form a cured product that exhibits an improved mechanical strength while maintaining inherent properties such as low birefringence and heat resistance, a cured product comprising the same, and a process for producing the same.
In other words, the present invention lies in (1) a photocurable composition comprising the following components A, B and C (with the proviso that the proportion of the various components each are represented relative to 100 parts by weight of the sum of the weight of the components A and B); (2) a cured product obtained by the copolymerization of the photocurable composition in the presence of a radical polymerization initiator; and (3) a process for producing the cured product which comprises the copolymerization of the photocurable composition in the presence of a radical polymerization initiator:
Component A: 70 to 99 parts by weight of an alicyclic skeleton-containing bis(meth)acrylate represented by the general formula (I):
(wherein R1 and R2 each independently represent a hydrogen atom or methyl group; m represents 1 or 2; n represents 0 or 1; and p and q each independently represent 0, 1 or 2);
Component B: 1 to 30 parts by weight of an alicyclic skeleton-containing mono(meth)acrylate represented by the general formula (II):
(wherein R3 represents a hydrogen atom or methyl group; m represents 1 or 2; n represents 0 or 1; and r and s each independently represent 0, 1 or 2); and
Component C: 1 to 10 parts by weight of a mercapto compound having a functionality of at least two.
本发明的目的是提供一种光固化组合物,该组合物可以形成一种固化物,该固化物在保持低双折射和耐热性等固有特性的同时,显示出更高的机械强度。
换句话说,本发明在于:(1) 一种光固化组合物,该组合物由以下组分 A、B 和 C 组成(附带条件是,各组分的比例相对于组分 A 和 B 重量总和的 100 重量份);(2) 在有自由基聚合引发剂存在的情况下,通过共聚光固化组合物而获得的固化产物;以及 (3) 生产固化产物的工艺,该工艺包括在有自由基聚合引发剂存在的情况下共聚光固化组合物:
组分 A:70 至 99 重量份的含脂环族骨架的双(甲基)丙烯酸酯,由通式(I)代表:
(其中 R1 和 R2 各自独立地代表氢原子或甲基;m 代表 1 或 2;n 代表 0 或 1;p 和 q 各自独立地代表 0、1 或 2);
组分 B:1 至 30 份(按重量计)由通式(II)代表的含脂环族骨架的单(甲基)丙烯酸酯:
(其中 R3 代表氢原子或甲基;m 代表 1 或 2;n 代表 0 或 1;r 和 s 各自独立地代表 0、1 或 2);以及
组分 C:1 至 10 重量份的巯基化合物,其官能度至少为 2。