Reinforced Powder Paint for Composites
AssigneeMcp IP, LLC
InventorMathew A. McPherson
Life of this patent
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Abstract
A fiber reinforced powder paint provides improved flexural fatigue resistance for composites substrates. Fiber loading in the powder is greater than 40%. Aramid fiber loading in an epoxy based powder paint is exemplified. A composite bow limb coated with the powder paint survives a remarkably greater number of bending cycles before failure when coated with the powder paint.
Claims19
A manufactured article comprising a body formed of a fiber/resin composite material having a powder coating thereon wherein the powder coating includes at least 40 volume-% of chopped reinforcing fiber.
The manufactured article as in 1 wherein the article is a member of the group consisting of archery bow components, composite springs, boat hulls, paddles, oars, sailing masts, rackets, fishing rods, and various components of bicycles, automobiles, motorcycles and aircraft that are subjected to high flexural loads.
An epoxy resin powder paint formulation wherein the formulation comprises at least 40% by volume of a chopped reinforcing fiber.
The epoxy resin powder paint formulation as in claim 19 wherein the chopped fibers in the powder coating are selected from the group consisting of carbon, aramid or ultrahigh molecular weight polyolefins.
A fiber reinforced composite article, wherein said article is a archery bow limb having a side under compression when the limb is in use, and at least a machined surface portion of the compression side where material of the composite had been removed to expose fiber ends, and a powder coating on at least said machined surface portion, wherein the powder coating comprises a powder coating resin and at least 40% by weight of chopped fibers having a length in the direction of elongation less than the size of the applied powder coating particles.
A method comprising:
- preparing a fiber reinforced thermoset composite article;
- machining surfaces on the article so as to expose ends of the reinforcement fiber;
- coating at least the machined surfaces with a powder coating comprising reinforcing fibers and a curable resin, and;
- subjecting the powder coating to conditions to effect curing of the powder coating curable resin.
Dependencies are inferred from the claim text.