Process for coating moisture-curable low molecular weight polymers and composites thereof

Claim 1

A method for protecting a weatherable substrate, which method comprises the steps: (a) providing a weatherable substrate; (b) applying to at least a portion of said weatherable substrate a moisture curable composition comprised of: (A) an amorphous polymer comprising a saturated carbon backbone having substituted thereon one or more silane moieties of the formula: ##STR9## wherein R 1 is: C 1 -C 12 alkoxy, C 1 -C 12 alkyleneoxy, C 4 -C 12 alkoxyalkoxy, C 5 -C 6 cycloalkoxy, C 6 -C 9 aryloxy, C 2 -C 13 alkylcarbonyloxy or C 1 -C 12 alkylamino; R 2 and R 3 are the same or different and are: hydrogen, C 1 -C 12 alkoxy, C 1 -C 12 alkyleneoxy, C 4 -C 12 alkoxyalkoxy, C 5 -C 6 cycloalkoxy, C 2 -C 13 alkylcarbonyloxy, C 1 -C 12 alkylamino, C 1 -C 12 alkyl, C 4 -C 12 alkoxyalkyl, C 5 -C 6 cycloalkyl or C 7 -C 9 aralkyl; and Q is C 2 -C 6 alkenylene, C 5 -C 8 cycloalkylene, C 5 -C 8 cycloalkenylene or of the formula: ##STR10## wherein j is a whole number between 0 and 6 inclusive; R 4 and R 5 are each independently hydrogen or C 1 -C 3 alkyl; R 6 is hydrogen or methyl; and y is an integer between 2 and 5 inclusive, with the proviso that j can be 0 or 1 only if the saturated carbon backbone had pendent unsaturation prior to being substituted with such silane moiety; said polymer having a viscosity average molecular weight of between about 500 and about 20,000; (B) between 0 and about 300 parts by weight, per 100 parts by weight of component (A), of a filler; and (C) between 0 and about 10,000 parts by weight, per 100 parts by weight of component (A), of an inert diluent; with the proviso that a total of at least 1 part by weight of (B) plus (C) per 100 parts by weight of component (A) is present; and (c) subjecting said coated substrate to curing conditions.

Claim 2

A method for protecting a weatherable substrate, which method comprises the steps: (a) providing a weatherable substrate; (b) applying to at least a portion of said weatherable substrate a moisture curable composition comprised of: (A) an amorphous polymer comprising a saturated carbon backbone having substituted thereon one or more silane moieties of the formula: ##STR9## wherein R 1 is: C 1 -C 12 alkoxy, C 1 -C 12 alkyleneoxy, C 4 -C 12 alkoxyalkoxy, C 5 -C 6 cycloalkoxy, C 6 -C 9 aryloxy, C 2 -C 13 alkylcarbonyloxy or C 1 -C 12 alkylamino; R 2 and R 3 are the same or different and are: hydrogen, C 1 -C 12 alkoxy, C 1 -C 12 alkyleneoxy, C 4 -C 12 alkoxyalkoxy, C 5 -C 6 cycloalkoxy, C 2 -C 13 alkylcarbonyloxy, C 1 -C 12 alkylamino, C 1 -C 12 alkyl, C 4 -C 12 alkoxyalkyl, C 5 -C 6 cycloalkyl or C 7 -C 9 aralkyl; and Q is C 2 -C 6 alkenylene, C 5 -C 8 cycloalkylene, C 5 -C 8 cycloalkenylene or of the formula: ##STR10## wherein j is a whole number between 0 and 6 inclusive; R 4 and R 5 are each independently hydrogen or C 1 -C 3 alkyl; R 6 is hydrogen or methyl; and y is an integer between 2 and 5 inclusive, with the proviso that j can be 0 or 1 only if the saturated carbon backbone had pendent unsaturation prior to being substituted with such silane moiety; said polymer having a viscosity average molecular weight of between about 500 and about 20,000; (B) between 0 and about 300 parts by weight, per 100 parts by weight of component (A), of a filler; and (C) between 0 and about 10,000 parts by weight, per 100 parts by weight of component (A), of an inert diluent; with the proviso that a total of at least 1 part by weight of (B) plus (C) per 100 parts by weight of component (A) is present; and (c) subjecting said coated substrate to curing conditions.