Coating compositions composed of hydroxyfunctional polymers or copolymers and alkoxysilanes

A resinous coating composition comprising a blend of a polyester polyol with:

• (A) from about 10 percent to about 50 percent by weight of polymer solids of an organoalkoxysilane crosslinking agent represented by the formula:
• R.sub.n Si(OR').sub.4-n
• wherein R is an aryl, alkaryl, aralkyl, alkyl having from 1 to 8 carbon atoms, ##STR10## or XR.sub.4 - radical, wherein R.sub.1 is hydrogen or an alkyl radical of 1 to 6 carbon atoms, R.sub.2 is a member selected from the group consisting of alkylene radicals of 1 to 7 carbon atoms and carbonyloxy radicals represented by the formula ##STR11## wherein R.sub.3 is an alkylene radical of 1 to 6 carbon atoms and m is 0 or 1, wherein R.sub.4 is an alkylene radical of 1 to 6 carbon atoms, a cycloalkylene radical, or any arylene radical, and x is a functional group selected from the group consisting of --OH, --SH, ##STR12## NH.sub.2 --CH.sub.2 --CH.sub.2 --NH--, NH.sub.2 --, and halogen, and wherein R' is methyl, ethyl, 2-methoxyethoxy, or 2-ethoxyethoxy and n is 0, 1 or 2;
• and
• (B) from about 0.1 percent to about 2.0 percent by weight of polymer solids of a cure accelerating catalyst.

A resinous coating composition comprising a blend of a polyurethane polyol with:

• (A) from about 10 percent to about 50 percent by weight of polymer solids of an organoalkoxysilane crosslinking agent represented by the formula:
• R.sub.n Si(OR').sub.4-n
• wherein R is an aryl, alkaryl, aralkyl, alkyl having from 1 to 8 carbon atoms, ##STR13## or XR.sub.4 -- radical, wherein R.sub.1 is hydrogen or an alkyl radical of 1 to 6 carbon atoms, R.sub.2 is a member selected from the group consisting of alkylene radicals of 1 to 7 carbon atoms and carbonyloxy radicals represented by the formula ##STR14## wherein R.sub.3 is an alkylene radical of 1 to 6 carbon atoms and m is 0 or 1, wherein R.sub.4 is an alkylene radical of 1 to 6 carbon atoms, a cycloalkylene radical, or any arylene radical, and x is a functional group selected from the group consisting of --OH, --SH, ##STR15## NH.sub.2 --CH.sub.2 --CH.sub.2 --NH--, NH.sub.2 --, and halogen, and wherein R' is methyl, ethyl, 2-methoxyethoxy, or 2-ethoxyethoxy and n is 0, 1 or 2;
• and
• (B) from about 0.1 percent to about 2.0 percent by weight of polymer solids of a cure accelerating catalyst.

A resinous coating composition comprising a blend of an ungelled reaction product of a polyurethane polyol containing at least 0.075 percent by weight of acidic carboxyl groups and an alkylenimine with:

• (A) from about 10 percent to about 50 percent by weight of polymer solids of an organoalkoxysilane crosslinking agent represented by the formula:
• R.sub.n Si(OR').sub.4-n
• wherein R is an aryl, alkaryl, aralkyl, alkyl having from 1 to 8 carbon atoms, ##STR17## or XR.sub.4 -- radical, wherein R.sub.1 is hydrogen or an alkyl radical of 1 to 6 carbon atoms, R.sub.2 is a member selected from the group consisting of alkylene radicals of 1 to 7 carbon atoms and carbonyloxy radicals represented by the formula ##STR18## wherein R.sub.3 is an alkylene radical of 1 to 6 carbon atoms and m is 0 or 1, wherein R.sub.4 is an alkylene radical of 1 to 6 carbon atoms, a cycloalkylene radical, or any arylene radical, and x is a functional group selected from the groups consisting of --OH, --SH, ##STR19## NH.sub.2 --CH.sub.2 --CH.sub.2 --NH--, NH.sub.2 --, and halogen, and wherein R' is methyl, ethyl, 2-methoxyethoxy, or 2-ethoxyethoxy and n is 0, 1 or 2;
• and
• (B) from about 0.1 percent to about 2.0 percent by weight of polymer solids of a cure accelerating catalyst.