IP Library › Patent Application 12841215
Patent Application
App. No. 12/841,215

LIGHTWEIGHT PARTICLES AND COMPOSITIONS CONTAINING THEM

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Quick Facts
Patent No.
US None
App. No.
12/841,215
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.

Claims (18)

1 . A particle comprising an exterior surface having a thin coating deposited thereon, wherein thin coating comprises a reaction product of reactants comprising:

(a) an aminoplast resin; and

(b) a compound comprising hydroxyl groups.

2 . The particle of claim 1 , wherein the particle is lightweight.

3 . The particle of claim 1 , wherein the particle comprises a thermally expandable capsule.

4 . A method of using the particle of claim 1 , comprising dispersing the particle in a composition comprising a binder.

5 . A composition comprising:

(a) a polymeric film-forming binder comprising reactive functional groups;

(b) optionally a crosslinking agent having functional groups reactive with the functional groups of the polymeric film-forming binder; and

(c) particles dispersed in the binder, wherein the particles comprise an exterior surface having a thin coating deposited thereon, wherein the thin coating comprises a polymer comprising reactive functional groups that are reactive with the functional groups of (a) and/or (b).

6 . The composition of claim 5 , wherein the thin coating comprises a thiol functional polymer.

7 . The composition of claim 6 , wherein the thiol functional polymer comprises the reaction product of reactants comprising:

(1) an aminoplast resin; and

(2) a polythiol.

8 . The composition of claim 7 , wherein the polythiol comprises a dithiol.

9 . The composition of claim 5 , wherein the binder comprises a sulfur-containing polymer.

10 . The composition of claim 9 , wherein the binder comprises a polythioether.

11 . The composition of claim 5 , wherein the particle comprises a thermally expandable capsule.