Ambient temperature curable hydroxyl containing polymer/silicon compositions

A substantially anhydrous, acid-free, room temperature curable composition which comprises

• (A) an organic thermoplastic polymer containing at least two hydroxyl radicals which are directly bonded to non-carboxylic carbon atoms of said polymer;
• and
• (B) a hydrolyzable aminoorganosilicon acylamino compound having the formula ##STR23## and mixtures thereof, wherein:
• X is an alkoxy radical having 1 to 6 carbon atoms;
• R is a divalent alkylene radical having 1 to 4 carbon atoms;
• R.sup.1 is hydrogen or an alkyl radical having 1 to 4 carbon atoms;
• R.sup.2 is a divalent alkylene radical having 2 to 4 carbon atoms;
• R.sup.3 is a radical selected from the group consisting of hydrogen, an alkyl radical having 1 to 20 carbon atoms or a phenyl radical;
• R.sup.4 is a radical selected from the group consisting of an alkyl radical having 1 to 20 carbon atoms, a phenyl radical or a silyl radical of the formula:
• ##STR24## wherein X, R and R.sup.1 are the same as defined above;
• Q is a radical selected from the group consisting of hydrogen, an alkyl radical of 1 to 4 carbon atoms, a phenyl radical or an ester radical of the formula --COOR.sup.5 wherein R.sup.5 is an alkyl radical having 1 to 4 carbon atoms;
• and wherein a has a value of 0 to 2 and t and x each have a value of 0 to 4, with the proviso that when x is at least 1, R.sup.4 can also be hydrogen;
• and wherein said composition contains about 5 to 50 parts by weight of said hydrolyzable silicon compound (B) per 100 parts by weight of said organic polymer (A).