US 2014/0030643 Al  52  Jan. 30, 2014  are the same as mentioned above with respect to the alkyl  group and cycloalkyl group represented by each ofR$_{201}$, R 202  and R$_{203 }$of general formula  (ZI)  above.  [0308]  As the alkylene group represented by A, there can be  mentioned an alky lene group having 1 to 12 carbon atoms ( for  example, a methylene group, an ethylene group, a propylene  group, an isopropylene group, a butylene group or an isobu› tylene group). As the alkenylene group represented by A,  there can be mentioned an alkenylene group having 2 to 12  carbon atoms (for example, an ethynylene group, a prope› nylene group or a butenylene group). As the arylene group  represented by A, there can be mentioned an arylene group  having 6 to 10 carbon atoms (for example, a phenylene group,  a tolylene group or a naphthylene group).  [0309]  Especially preferred examples of the acid genera› tors will be shown below.  (zl)  (z2)  (z3)  (z4)  (z5)  (z6)  (z7)  -continued  (  Ors’c,c,oc,c,so,  (zS)  (z9)  (Or~s#zo  (zl0)  (Orso,s*c  F  F  (zll)  O-s-0-s~)  2  (z12)  (z13)  F  F  ~  C4F9SO3- -o~  F  ~- s+  3  F  F  (z14)  O-s-0-s~),  c,c,so,  +o-s  ~),  c,c,so,  (z15)  Rc0-0-S  ~),  C,C,SO;  (z16)  (-t-Ot;:s~  (zl 7)  2  (zlS) 