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US 11,292,937 B2Granted
Lightweight particles and compositions containing them
AssigneePPG Industries Ohio, Inc.
InventorsLawrence G. Anderson, Chester J. Szymanski
Life of this patent
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Abstract
Disclosed are particles that have an exterior surface coated with a thin polymeric coating, such as a coating that includes a sulfur-containing polymer. Also disclosed are compositions, such as fuel-resistant sealant and coating compositions, which include such particles. Aerospace vehicles having an aperture at least partially sealed with a sealant deposited from such a sealant composition are also disclosed.
Claims25
A plurality of particles, wherein the particles comprise:
- a coating of an aminoplast resin, wherein the coating has a thickness less than 25 μm;
- and
- the particles, without the coating, have a specific gravity of no more than 0.1.
Dependencies are inferred from the claim text.