Elimination of surfacing film and primer from composite substrates
AssigneeThe Boeing Company
InventorsMark R. Brei, Kevin D. Gordon, Kjersta Larson-Smith
Life of this patent
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Abstract
Co-curable epoxy-based composite materials coated with co-curable polyurethane-based coating materials to form co-curable and co-cured polyurethane coated epoxy-based composite materials, with the polyurethane-based coating materials comprising UV-stabilizer agents and cure control agents are disclosed, along with components and large structures comprising the co-cured materials.
Claims20
A co-curable epoxy-based composite material comprising:
- at least one layer of a co-curable polyurethane-based coating material, said co-curable polyurethane-based coating material configured to be disposed directly onto the co-curable epoxy-based composite material to form co-curable epoxy-based composite material coated with a co-curable polyurethane-based coating material layer, said co-curable polyurethane-based coating material layer comprising:
- an amount of a UV-stabilizer agent;
- and
- an amount of a curing control agent;
- wherein the co-curable polyurethane-based coating material layer at a thickness ranging from about 2 mils to about 3 mils comprises a UV transmittance value of 0% over a UV wavelength range of from about 200 nm to about 800 nm and comprises a Tg ranging from about 50° F. to about 250° F.
A co-cured polyurethane-coated epoxy-based composite material comprising:
- a co-cured polyurethane-based coating material;
- and
- a co-cured epoxy-based composite material, to form a co-cured polyurethane-coated epoxy-based composite material, said co-curable polyurethane-based coating material layer comprising an amount of a UV stabilizer agent;
- wherein the co-cured polyurethane-based coating material layer comprises a UV transmittance value of 0% when the co-cured polyurethane-based coating material layer comprises an average thickness ranging from about 2 mils to about 3 mils.
A method comprising:
- applying a co-curable polyurethane-based coating layer directly to a co-curable epoxy-based composite material;
- forming a co-curable polyurethane-coated epoxy-based composite material, said co-curable polyurethane-based coating layer comprising:
- a UV-stabilizer agent;
- and
- a curing control agent;
- wherein the co-curable polyurethane-based coating material layer at a thickness ranging from about 2 mils to about 3 mils comprises a UV transmittance value of 0% over a UV wavelength range of from about 200 nm to about 800 nm and comprises a Tg ranging from about 50° F. to about 250° F.
A method of forming a co-cured epoxy-based composite material comprising:
- providing a co-curable epoxy-based composite material coated with a co-curable polyurethane-based coating material layer, said co-curable polyurethane-based coating material layer comprising:
- a UV-inhibiting agent;
- a curing control agent;
- and
- co-curing the co-curable polyurethane-based coating material layer and the co-curable epoxy-based composite material at a co-curing temperature ranging from about 250° F. to about 370° F. to form a co-cured polyurethane-coated epoxy-based composite material;
- wherein the co-curable polyurethane-based coating material layer at a thickness ranging from about 2 mils to about 3 mils comprises a UV transmittance value of 0% over a UV wavelength range of from about 200 nm to about 800 nm and comprises a Tg ranging from about 50° F. to about 250° F.
Dependencies are inferred from the claim text.