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US 7,598,326 B2Granted
Polymer blend and compositions and methods for using the same
AssigneePRC-DeSoto International, Inc.
InventorMichael A. Cosman
Life of this patent
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Abstract
A polymer blend having at least one polysulfide component and at least one polythioether component is disclosed. The polymer blend offers numerous advantages, including the ability to compatibilize formulations based on either polysulfide chemistry or polythioether chemistry alone. Compositions comprising the polymer blend, particularly sealant formulations for use in aerospace applications, are also disclosed, as are multilayer sealant assemblies and methods for repairing the same.
Claims19
A polymer blend comprising:
- a) at least one polysulfide component;
- b) at least one polythioether component;
- and
- c) the reaction product of a polysulfide, dimercaptodiethylsulfide, and an amine.
1 more element
A method for repairing a first sealant layer, comprising:
- a) applying a composition comprising a polymer blend to the first sealant layer, wherein the polymer blend comprises:
- (i) at least one polysulfide component;
- (ii) at least one polythioether component;
- and
- (iii) the reaction product of a polysulfide, dimercaptodiethylsulfide, and an amine;
- and b) applying a second sealant layer thereon;
- wherein either the first or second sealant layer is based on polysulfide chemistry, and the other of the first or second sealant layer is based on polythioether chemistry.
4 more elements
Dependencies are inferred from the claim text.