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US 12,559,593 B2Granted
Dual cure sealants
AssigneePRC-DeSoto International, Inc.
InventorsJianCheng Liu, Srikant Pathak, Bruce Virnelson
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Abstract
Compositions that are curable by free radical redox reactions are disclosed. Free radical curing reactions between polythiols and polyalkyenyls are initiated by the reaction of metal complexes and organic peroxides. The compositions are useful as sealants.
Claims22
A composition comprising:
- a polythiol, wherein the polythiol comprises a thiol-terminated polythioether prepolymer;
- a bis(alkenyl) ether monomer;
- a hydroxyl-functional vinyl ether monomer;
- a hydrogen donor;
- from 0.001 wt % to 3 wt % of a metal complex;
- and
- from 0.01 wt % to 4 wt % of an organic peroxide;
- wherein wt % is based on the total weight of the composition.
5 more elements
Dependencies are inferred from the claim text.