Hydrosilyation cured silicone resin containing colloidal silica and a process for producing the same
AssigneeDow Corning Corporation
InventorsZhongtao Li, Frederick J. McGarry, Dimitris E. Katsoulis, John R. Keryk, Debora F. Bergstrom, Kermit S. Kwan, Bizhong Zhu
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Abstract
A hydrosilylation reaction curable composition including a silsesquioxane polymer, a cross-linking compound, a hydrosilylation reaction catalyst and colloidal silica having a surface coating formed thereon. The curable composition is cured to form a cured resin having high fracture toughness and strength without the loss of elastic modulus and glass transition temperature.
Claims33
A hydrosilylation reaction curable composition comprising:
- a) a silsesquioxane polymer
- b) a cross-linking compound;
- c) a hydrosilylation reaction catalyst;
- d) Colloidal silica having a surface coating formed thereon.
A process for preparing a hydrosilyation reaction curable composition comprising the steps of:
- a) providing a silsesquioxane polymer;
- b) providing a cross-linking compound;
- c) providing colloidal silica with a surface treatment formed thereon;
- d) mixing the components of a), b), c) to form a curable composition;
- e) adding a hydrosilylation reaction catalyst to the curable composition of step d)
- f) curing the curable composition of step e) to form a cured resin having high fracture toughness and strength without the loss of elastic modulus and glass transition temperature.
Dependencies are inferred from the claim text.