High glass transition temperature epoxy formulations for cryogenic applications
AssigneeSpace Exploration Technologies Corp.
InventorsWenhong Fan, Ryan Christopher Kennett, Joshua James Conlon
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Abstract
A method of increasing the glass transition point of a cured epoxy comprising a bisphenol A diglycidyl ether and a polyetheramine includes the step of including 1,8-diamino-p-menthane as an additional hardener for curing the epoxy. An epoxy formulation includes bisphenol A diglycidyl ether and a hardener including a polyetheramine and 1,8-diamino-p-menthane.
Claims21
A method of increasing the glass transition point of a cured epoxy comprising a glycidyl ether resin and a polyetheramine, the method comprising:
- including 1,8-diamino-p-menthane as an additional hardener for curing the epoxy,
- wherein a ratio of polyetheramine to 1,8-diamino-p-menthane is 1:2.5±15% by weight.
An uncured epoxy formulation, comprising:
- a glycidyl ether resin;
- and
- a hardener including a polyetheramine and 1,8-diamino-p-menthane,
- wherein a ratio of the polyetheramine to 1,8-diamino-p-menthane is 1:2.5±15% by weight.
A cured epoxy formulation, comprising:
- the cured product of a glycidyl ether resin, and a hardener of a polyetheramine and 1,8-diamino-p-menthane, wherein a ratio of the polyetheramine to 1,8-diamino-p-menthane is 1:2.5±15% by weight.
A composite overwrapped pressure vessel, comprising:
- a metal liner overwrapped with fibers impregnated with the cured product of a glycidyl ether resin;
- and a hardener of a polyetheramine and 1,8-diamino-p-menthane, wherein a ratio of the polyetheramine to 1,8-diamino-p-menthane is 1:2.5±15% by weight.
Dependencies are inferred from the claim text.