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US 11,111,422 B2Granted
Hydraulic fluid and fuel resistant sealants
AssigneePRC-DeSoto International, Inc.
InventorsRenhe Lin, Weibin Cui
Life of this patent
Estimating the term…
Abstract
Compositions that are resistant to hydraulic fluid and aviation fuel contain sulfur-containing prepolymers and solvent-resistant organic fillers. The compositions are useful in aerospace sealant applications.
Claims33
A composition comprising:
- (a) from 35 wt % to 65 wt % of a thiol-terminated sulfur-containing prepolymer;
- (b) from 10 wt % to 35 wt % of an organic filler;
- (c) from 5 wt % to 30 wt % of an inorganic filler;
- and
- (d) from 5 wt % to 20 wt % of a polyepoxide,
- wherein the composition has a specific gravity less than 1.2, wherein specific gravity is determined according to ISO 2781;
- and
- wherein wt % is based on the total weight of the composition.
5 more elements
A sealant system comprising a first part and a second part, wherein,
- the first part comprises:
- from 50 wt % to 70 wt % of a thiol-terminated sulfur-containing prepolymer;
- from 15 wt % to 40 wt % of an organic filler;
- from 2 wt % to 16 wt % of an inorganic filler, and
- from 0.5 wt % to 3 wt % of an adhesion promoter,
- wherein wt % is based on the total weight of the first part;
- and
- the second part comprises:
- from 35 wt % to 80 wt % of a polyepoxide;
- from 10 wt % to 50 wt % of an inorganic filler, and
- from 0.5 wt % to 10 wt % of an adhesion promoter,
- wherein wt % is based on the total weight of the second part,
- wherein the combined first part and the second part has a specific gravity less than 1.2, wherein specific gravity is determined according to ISO 2781.
10 more elements
Dependencies are inferred from the claim text.