Patent ID: 8722148

Claim:
A coating composition comprising (A) 100 weight parts of at least one epoxy resin, wherein the epoxy resin has at least two epoxy groups in one molecule; (B) 40 to 900 weight parts of at least one alkoxy-containing aminofunctional silicone resin comprising the units: (R 3 Si(OR′) w O (1-w)/2) ) a (i) (R 2 Si(OR′) x O (2-x)/2 ) b (ii) (RSi(OR′) y O (3-y)/2 ) c (iii) and (Si(OR′) z O (4-z)/2)d (iv) wherein each R is independently an alkyl group, an aryl group, or an aminofunctional hydrocarbon group, each R′ is independently an alkyl group, a has a value of less than 0.4, b has a value of greater than 0.15, c has a value of greater than zero to 0.8, d has a value of less than 0.2, the value of a+b+c+d=1, w has a value from 0 to less than 1, x has a value from 0 to less than 2, y has a value from 0 to less than 3, z has a value from 0 to less than 4, with the proviso that the alkoxy-containing aminofunctional silicone resin has an —NH— equivalent weight of 100 to 1500, and with the proviso that the alkoxy-containing aminofunctional silicone resin has a total alkoxy content ranging from 26 to 80 mol percent of silicon in the alkoxy-containing aminofunctional silicone resin; (C) up to 50 weight parts of at least one organic hardener; (D) up to 100 weight parts of at least one epoxyfunctional silicone resin comprising the units: ((R 3 ) 3 SiO 1/2 ) e (i) ((R 3 ) 2 SiO 2/2 ) f (ii) and ((R 3 )SiO 3/2 ) g (iii) wherein R 3 is independently an alkyl group having from 1 to 8 carbon atoms, an aryl group having from 1 to 8 carbon atoms, a glycidyl ether group, an alkyl epoxy group, or a cycloaliphatic epoxy group, e has a value of 0.1 to 0.5, f has a value of 0.1 to 0.5, and g has a value of 0.5 to 0.9, with the proviso that the epoxyfunctional silicone resin has an epoxy equivalent weight of 200 to 700; and (E) up to 10 weight parts of at least one cure accelerator, provided the alkoxy-containing aminofunctional silicone resin (B) has a total alkoxy content ranging from 26 to 80 mol percent per mole of silicon (Si) in the alkoxy-containing aminofunctional silicone resin.