Patent ID: 8007869

Claim:
A method of preparing a reinforced silicone resin film, the method comprising the steps of: impregnating a fiber reinforcement in a condensation-curable silicone composition comprising a silicone resin; and curing the silicone resin of the impregnated fiber reinforcement; wherein the reinforced silicone resin film comprises from 10 to 99% (w/w) of the cured silicone resin, and the film can be bent over a cylindrical steel mandrel having a diameter less than or equal to 3.2 mm in accordance with ASTM Standard D522-93a Method B without cracking; wherein the condensation-curable silicone composition comprises a silicone resin having the formula (R 1 R 2 2 SiO 1/2 ) w (R 2 2 SiO 2/2 ) x (R 2 SiO 3/2 ) y (SiO 4/2 ) z (I), wherein R 1 is independently C 1 to C 10 hydrocarbyl or C 1 to C 10 halogen-substituted hydrocarbyl, R 2 is independently R 1 , —H, —OH, or a hydrolysable group, w is from 0 to 0.8, x is from 0 to 0.6, y is from 0 to 0.99, z is from 0 to 0.35, w+x+y+z=1, y+z/(w+x+y+z) is from 0.2 to 0.99, and w+x/(w+x+y+z) is from 0 to 0.8, provided when y is 0, w+x/(w+x+y+z) is from 0.05 to 0.8, and the silicone resin has an average of at least two silicon-bonded hydrogen atoms, hydroxyl groups, or hydrolysable groups per molecule.