abstract |
A peel-off coating composition comprising a combination of branched polyorganosiloxanes. The first branched siloxane in the combination is a unit formula: (R 1 3 SiO 1/2 ) a (R 2 R 1 2 SiO 1/2 ) b (R 1 2 SiO 2/2 ) c (SiO 4/2 ) MDQ siloxane of d , wherein each R 1 is independently a monovalent hydrocarbon group having no aliphatic unsaturation, and each R 2 is an aliphatic unsaturated hydrocarbon group, wherein the subscript a 0, subscript b> 0, subscript c 995, and the subscript d> 0. The second branched siloxane in the combination is a unit formula: (R 1 3 SiO 1/2 ) e (R 2 R 1 2 SiO 1/2 ) f (R 1 2 SiO 2/2 ) g (R 1 SiO 3/2 ) h MDT silsesquioxane, where the subscript e 0, subscript f> 0, subscript g 995, and the subscript h> 0. The peeling coating composition further includes a cross-linking agent having at least 3 silicon-bonded hydrogen atoms per molecule and a platinum-based metal catalyst. |