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US 9,856,359 B2Granted
Core-shell particles, compositions incorporating the core-shell particles and methods of making the same
AssigneeThe Boeing Company
InventorsAndrew P. Nowak, Sophia S. Yang, Thomas I. Boundy, Darrin M. Hansen, Alain A. Adjorlolo, Carissa A. Pajel, Eliana V. Ghantous
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Abstract
A low viscosity polysulfide sealant composition. The composition comprises a curable polysulfide polymer; a crosslinking agent; and a plurality of core-shell particles. The core-shell particles comprise: a core comprising a ferromagnetic material; and a shell comprising silica treated with an organic sulfur containing compound. The shell is capable of bonding with the polysulfide polymer.
Claims15
A polysulfide sealant composition, comprising:
- a curable polysulfide polymer;
- a crosslinking agent;
- and
- a plurality of core-shell particles comprising:
- a core comprising a ferromagnetic material;
- and
- a shell comprising silica treated with an organic sulfur-containing compound, the shell being capable of bonding with the polysulfide polymer.
4 more elements
A process comprising:
- coating a substrate with a polysulfide sealant composition to form a sealant layer, the polysulfide sealant composition having a first viscosity and comprising:
- (a) a curable polysulfide polymer;
- and
- (b) a plurality of core-shell particles comprising:
- (i) a core comprising a ferromagnetic material;
- and
- (ii) a shell comprising silica treated with an organic sulfur-containing compound capable of bonding with the polysulfide polymer and the substrate;
- exposing the sealant layer to a magnetic field to consolidate the core-shell particles at an interface between the sealant layer and the substrate.
5 more elements
Dependencies are inferred from the claim text.