Patent ID: 7666804

Claim:
An uncured structure that is suitable for storage at ambient temperatures, said uncured structure comprising: a) a porous body comprising an exterior surface and interior surfaces located within said porous body that define interstitial spaces located with said porous body; b) a resin composition located at said exterior surface of the porous body, said resin composition forming a cured resin when exposed to a curing agent and heated to a curing temperature that is higher than said ambient temperature, said resin composition comprising: a first non-crystalline component, said non-crystalline component including one or more non-crystalline thermosetting resins; a second non-crystalline component, said non-crystalline component including one or more non-crystalline thermosetting resins; and a crystalline component that comprises one or more crystalline thermosetting resins wherein said crystalline component is located between said first and second non-crystalline components to provide a zone that is rich in said one or more crystalline thermosetting resins and wherein said one or more crystalline thermosetting resins has a melting point that is above said ambient temperature and below said curing temperature and wherein the viscosity of said resin composition changes from a high viscosity state to a low viscosity state when the temperature of said resin composition is increased from said ambient temperature to said curing temperature; and c) a curative component comprising a curing agent for said resin composition, said curing agent being separated from said resin composition within said uncured structure during storage of said uncured structure at said ambient temperatures, wherein the viscosity of said resin composition in said low viscosity state is sufficient to allow said resin component to flow into said interstitial spaces.