申请人:TOKUYAMA CORPORATION
公开号:EP1591098A1
公开(公告)日:2005-11-02
A cationically curable composition for dental use containing a cationic polymerization initiator (I) and cationically polymerizable monomers (II), the cationically polymerizable monomers (II) containing an oxetane compound and an epoxy compound or an alkenyl ether compound at a ratio of amounts that satisfy the conditions expressed by the following formula,
(a x A) : (b x B) = 91 : 9 to 45 : 55
wherein A is a mol number of the oxetane compound, "a" is an average number of the oxetane functional group contained in one molecule of the oxetane compound, B is a mol number of the epoxy compound or the alkenyl ether compound, and "b" is an average number of the epoxy functional group contained in one molecule of the epoxy compound or an average number of the alkenyl ether functional group contained in one molecule of the alkenyl ether compound.
The composition is not hindered by oxygen from being polymerized, cures quickly even without using a special polymerizable monomer or a particular polymerization initiator, little forms an unpolymerized layer on the surface even when polymerized and cured in a highly humid environment such as in the oral cavity, and is suited as a filling/restorative material for dental use.
一种用于牙科的阳离子固化组合物,含有阳离子聚合引发剂(I)和阳离子可聚合单体(II),阳离子可聚合单体(II)含有氧杂环丁烷化合物和环氧化合物或烯基醚化合物,其用量比例满足下式所表示的条件、
(a x A) : (b x B) = 91 : 9 至 45 :55
其中 A 是氧杂环丁烷化合物的摩尔数,"a "是一分子氧杂环丁烷化合物中所含的氧杂环丁烷官能团的平均数,B 是环氧化合物或烯基醚化合物的摩尔数,"b "是一分子环氧化合物中所含的环氧官能团的平均数或一分子烯基醚化合物中所含的烯基醚官能团的平均数。
该组合物的聚合不受氧气阻碍,即使不使用特殊的可聚合单体或特定的聚合引发剂也能快速固化,即使在口腔等高湿度环境中聚合固化,也几乎不会在表面上形成未聚合层,适合作为牙科用填充/修复材料。