| abstract |
A coating composition having improved abrasion resistance is provided, which comprises (A) a composition comprising (1) an organooxy-chainstopped organopolysilsesquioxane, (2) a tetraorganotitanate, (3) (a) a siloxane-functionalized ester having the general formula (R 3 O) 3-2n SiO n R 4 OC(O)R 5 C(O)OR 6 , wherein n is equal to 0, 1/2, or 1, each R 3 is independently a saturated or unsaturated monovalent hydrocarbon radical containing from 1 to about 20 carbon atoms, R 4 is a divalent hydrocarbon radical containing from 1 to about 20 carbon atoms, R 5 is a divalent conjugated olefinic radical having from 2 to 4 carbon atoms, and R 6 is R 3 or R 4 SiO n (OR 3 ) 3-2n ; or (b) a cyanoorganotriorganooxysilane: and (4) an organic carboxylic acid ester; and (B) from 0% to about 85% of a volatile diluent. Also provided is a coating composition having improved abrasion resistance wherein part (A) is a copolymer of the organopolysilsesquioxane (A)(1) above and the ester (A)(3). |