Patent ID: 8303704

Claim:
A siloxane based coating composition having excellent dyeability, abrasion resistance, glossiness and transparency, comprising: (a) 0.1 to 50 parts by weight of a compound expressed by the following Chemical Formula 1, its hydrolysates, or its partial condensates; (b) 10 to 60 parts by weight of a compound expressed by the following Chemical Formula 2, its hydrolysates, or its partial condensates; (c) 10 to 80 parts by weight of inorganic oxide with a refractive index of 1.7 to 3.0; (d) 30 to 90 parts by weight of solvent; and (e) 0.01 to 5 parts by weight of dyeing improving material, R a 1 Si(OR 2 ) 4-a Chemical Formula 1: where, in the Chemical Formula 1, R 1 and R 2 are independently selected from the group consisting of alkyl groups of C 1 to C 6 , alkenyl groups of C 2 to C 6 , halogenated alkyl groups of C 1 to C 6 , aryl groups of C 2 to C 6 , and aromatic hydrocarbon group of C 3 to C 6 , and a is an integer in the range of 0 to 3, R b 3 Si(OR 4 ) 4-b Chemical Formula 2: where, in the Chemical Formula 2, R 3 is R 5 is a alkylene group of C 1 to C 4 , R 6 is selected from the group consisting of hydrogen, alkyl groups of C 1 to C 4 , and R 7 is selected from the group consisting of hydrogen and alkylene groups of C 1 to C 4 , R 4 is an alkyl group of C 1 to C 6 , and b is an integer in the range of 0 to 3, wherein the dyeing improving material is selected from the group consisting of nitric acid, hydrochloric acid, phosphoric acid, sodium nitrate, potassium nitrate, silver nitrate, polyvinylpyrrolidone, polyacrylic acid, sodium polyacrylate, polyethylene imine, polystylene sulphonate, N-β(amino ethyl)γ-aminopropyl methyl dimethoxy silane, N-β(amino ethyl)γ-aminopropyl trimethoxy silane, N-β(amino ethyl)γ-aminopropyl triethoxy silane, γ-aminopropyl trimethoxy silane, γ-aminopropyl triethoxy silane, N-phenyl-γ-aminopropyl trimethoxy silane, and their mixtures.