Polythiol sealants
AssigneePhillips Petroleum Company
InventorsRichard C. Doss, Timothy P. Murtha
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Abstract
Naphthalene and alkylated naphthalenes are useful as sulfur-solubilizers in coating and sealant formulations based on polymercaptan-terminated polymers. In one embodiment, sealant and coating formulations are prepared by curing a mixture of (a) a polymercaptan-terminated polymer, (b) naphthalene or alkylated naphthalenes as sulfur-solubilizers containing dissolved sulfur, and (c) a curing agent.
Claims14
Curable sealant and coating compositions comprising (a) a poly(oxyalkylene)-polyester-poly(monosulfide)-polythiol having an average of more than two mercapto groups per molecule and (b) at least one of naphthalene and alkylated naphthalenes as sulfur-solubilizers containing dissolved sulfur, the amount of sulfur present being sufficient to provide some curing in the polymer.
A process for the production of sealant and coating formulations which process comprises incorporating into a poly(oxyalkylene)-polyester-poly(monosulfide)-polythiol having an average of more than two mercapto groups per molecule naphthalene or alkylated naphthalenes as sulfur-solubilizers containing dissolved sulfur, and an additional curing agent, the amount of sulfur present being sufficient to effect some curing of the polymer with the further proviso that the total amount of curing agent present being sufficient to convert at least 70 percent of the pendent thiol groups to polysulfide groups, and allowing the thus prepared formulation to cure and form sealant and coating compositions.
Dependencies are inferred from the claim text.