Addition-fragmentation agents of the formula are disclosed:
wherein
R
1
, R
2
and R
3
are each independently Z-Q-, a (hetero)alkyl group or a (hetero)aryl group with the proviso that at least one of R
1
, R
2
and R
3
is Z
m
-Q-,
Q is a linking group have a valence of m+1;
Z is an ethylenically unsaturated polymerizable group,
m is 1 to 6;
each X
1
is independently —O— or —NR
4
—, where R
4
is H or C
1
-C
4
alkyl, and
n is 0 or 1.
公开了以下式子的加成-解离剂:
其中,
R1,R2和R3分别独立地为Z-Q-,(杂)烷基或(杂)芳基,但至少其中一个为Zm-Q-;
Q为连接基团,具有m+1的价;
Z为
乙烯基不饱和可聚合基团,m为1到6;
每个X1独立地为—O—或—NR4—,其中R4为H或C1-C4烷基,n为0或1。