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US 2003/0171486 A1Published application
High fracture toughness hydrosilyation cured silicone resin
AssigneeDow Corning Corporation
InventorsZhongtao Li, Frederick J. McGarry, John R. Keryk, Bizhong Zhu, Dimitris E. Katsoulis
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Abstract
A hydrosilylation reaction curable composition that includes a silsesquioxane polymer, a mixture of silanes or siloxanes as a cross-linking compound and a hydrosilylation reaction catalyst. The curable composition is cured to form a cured resin having high fracture toughness and strength without the loss of elastic modulus.
Claims17
A hydrosilylation reaction curable composition comprising:
- a) a silsesquioxane polymer
- b) a mixture of silane and/or siloxane cross-linking compounds;
- and
- c) a hydrosilylation reaction catalyst;
- the cured composition displaying a fracture toughness that is greater than the fracture toughness of a cured composition formed utilizing any of the individual cross-linking compounds of the mixture alone.
2 more elements
A process for preparing a hydrosilyation reaction curable composition comprising the steps of:
- a) providing a silsesquioxane polymer;
- b) providing a mixture of silanes or siloxanes as a cross-linking compound;
- c) mixing the components of a), b), to form a curable composition;
- d) adding a hydrosilylation reaction catalyst to the curable composition of step c)
- e) curing the curable composition of step d) to form a cured resin having a fracture toughness that is greater than the fracture toughness of a cured composition utilizing any of the individual cross-linking compounds of the mixture alone.
2 more elements
Dependencies are inferred from the claim text.