A polymerizable composition comprising: a polyurethane resin synthesized by using a compound represented by the following formula (I) as one of starting materials; a photopolymerization or thermal polymerization initiator; and an addition-polymerizable compound having an ethylenically unsaturated bond:
wherein X represents a tri- or higher valent atom; R
1
and R
2
each independently represent a single bond or an alkylene group optionally having a substituent, provided that R
1
and R
2
do not represent a single bond at a same time; A represents a straight chain linking group; and n is an integer of from 1 to 5.
一种可聚合的组合物,包括:由使用以下式(I)所表示的化合物之一作为起始材料合成的聚
氨酯
树脂;光聚合或热聚合
引发剂;以及具有
乙烯基不饱和键的加成聚合化合物:其中,X代表三价或更高价原子;R1和R2各自独立地表示单键或具有取代基的烷基基团,但R1和R2不能同时表示单键;A表示直链连接基团;n为1到5的整数。