Photosensitive material

DETAILED DESCRIPTION In the present invention, there is employed as a monomer (a) a compound of the following general formula (I): R.
sub.
f B.
sub.
m (CH.
sub.
2).
sub.
n --X--CR.
dbd.
CH.
sub.
2 (I) wherein R.
sub.
f is a perfluoroalkyl or perfluoroalkenyl group having 7 to 21 carbon atoms, B is a bivalent group linking the R.
sub.
f group and --(CH.
sub.
2).
sub.
n -- group, R is hydrogen atom or methyl group, X is a single bond or a bivalent group such as --O--, --OCO--, --COO--, --NHCO-- or --CO--, m is 0 or 1, and n is an integer of 1 to 10.
Ethylenically unsaturated end-groups as shown by the formula --X--CR.
dbd.
CH.
sub.
2 in the above formula (I) include, for instance, --CH.
dbd.
CH.
sub.
2, --OCH.
dbd.
CH.
sub.
2, --OCOC(CH.
sub.
3).
dbd.
CH.
sub.
2, --COOCH.
dbd.
CH.
sub.
2, --NHCOCH.
dbd.
CH.
sub.
2 and --COCH.
dbd.
CH.
sub.
2, but are not limited to them.
Bivalent groups containing --(CH.
sub.
2).
sub.
n -- group and linking the both R.
sub.
f and --X--CR.
dbd.
CH.
sub.
2 end-groups, as shown by the formula --B.
sub.
m (CH.
sub.
2).
sub.
n -- in the above formula (I), include, for instance, --(CH.
sub.
2).
sub.
n --, --CO(CH.
sub.
2).
sub.
n --, --SO.
sub.
2 (CH.
sub.
2).
sub.
n --, --O(CH.
sub.
2).
sub.
n --, --(CH.
sub.
2).
sub.
3 --O(CH.
sub.
2).
sub.
n --, --S(CH.
sub.
2).
sub.
n --, --(CH.
sub.
2).
sub.
p --NR.
sup.
1 (CH.
sub.
2).
sub.
n --, --CO--NR.
sup.
1 (CH.
sub.
2).
sub.
n --, --SO.
sub.
2 --NR.
sup.
1 (CH.
sub.
2).
sub.
n --, ##STR1## wherein n is as defined above, R.
sup.
1 is hydrogen atom or an alkyl group having 1 to 5 carbon atoms, and p is an integer of 1 to 6.
The perfluoroalkyl or perfluoroalkenyl end-groups R.
sub.
f may be those having a straight-chain structure, a branched-chain structure, a ring structure or a combined structure thereof.
Preferable monomer (a) employed in the present invention is a compound of the following general formula (Ia): R.
sub.
f B.
sub.
m (CH.
sub.
2).
sub.
n OCOCR.
dbd.
CH.
sub.
2 (Ia) wherein R.
sub.
f, B, R, m and n are as defined above.
The bivalent groups B linking the R.
sub.
f group and --(CH.
sub.
2).
sub.
n -- group include, for instance, --CO--, --SO.
sub