Acid-curable composition containing a masked curing catalyst, and a process for its preparation

A compound of the formula ##STR30## wherein R.sub.6 is unsubstituted phenyl, naphthyl, anthryl or phenanthryl, or phenyl or naphthyl substituted with from 1 to 3 substituents selected from the group consisting of chloro, bromo, C.sub.1 -C.sub.8 alkyl, phenyl, C.sub.1 -C.sub.8 alkoxy, phenoxy, benzyloxy, C.sub.1 -C.sub.8 alkylthio, phenylthio, 2-hydroxyethylthio, C.sub.1 -C.sub.4 alkylCONH, benzoylamino, dimethylamino, and benzoyl;

• R.sub.7 is hydroxy, C.sub.1 -C.sub.4 alkoxy, --OSi(CH.sub.3).sub.3, or acetoxy;
• R.sub.8, taken alone, is C.sub.1 -C.sub.8 alkyl or C.sub.1 -C.sub.8 alkyl substituted with phenyl;
• and
• R.sub.9, taken alone, is hydrogen;
• C.sub.1 -C.sub.8 alkyl unsubstituted or substituted with hydroxy, chloro, or phenyl;
• phenyl unsubstituted or substituted with hydroxy, chloro, C.sub.1 -C.sub.4 alkyl, or C.sub.1 -C.sub.4 alkoxy;
• C.sub.2 -C.sub.6 alkenyl;
• C.sub.8 -C.sub.9 phenylalkenyl;
• furyl;
• thienyl;
• trichloromethyl;
• C.sub.5 -C.sub.6 -cycloalkyl;
• or C.sub.5 -C.sub.6 cycloalkenyl;
• or
• R.sub.8 and R.sub.9, taken together, together with the carbon atoms to which they are attached, are a 5- or 6-membered saturated ring in which the remaining three to four ring members are selected from the group consisting of --CH.sub.2 --, --CH(CH.sub.3)--, and --C(CH.sub.3).sub.2 ;
• n has a value of 1 or 2;
• and
• when n is 1, R.sub.10 is C.sub.5 -C.sub.6 cycloalkyl;
• C.sub.7 -C.sub.9 aralkyl;
• camphoryl;
• trifluoromethyl;
• trichloromethyl;
• fluoro;
• amino;
• C.sub.1 -C.sub.18 alkyl;
• phenyl unsubstituted or substituted with chloro, hydroxy, C.sub.1 -C.sub.12 alkyl, C.sub.1 -C.sub.4 alkoxy, C.sub.1 -C.sub.4 alkylCONH, benzoyl amino, nitro, or benzoyl;
• or naphthyl, unsubstituted or substituted with chloro, C.sub.1 -C.sub.12 alkyl, or C.sub.1 -C.sub.4 alkoxy;
• or
• when n is 2, R.sub.10 is --(CH.sub.2).sub.m -- in which m has a value of 2 to 8;
• naphthylene;
• or phenylene unsubstituted or substituted with C.sub.1 -C.sub.12 alkyl.