Curable composition comprising elastomeric terpolymer of carbon monoxide
AssigneeE. I. Du Pont de Nemours and Company
InventorGary L. Loomis
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Abstract
Terpolymers having 1,4-diketo functionalities and a carbonyl group concentration of about 5-20% of polymer weight can be conveniently cured by heating with an aromatic primary diamine or its precursor and a catalytic amount of an acid having a pKa of at most about 3. Cured polymers have good physical properties and are suitable in such applications as, for example hose, tubing, wire coatings, gaskets, and seals.
Claims14
A curable composition comprising an elastomeric terpolymer of ethylene with carbon monoxide and with another ethylenically unsaturated monomer, in which ketone carbonyl concentration is about 5-20% of the polymer weight and a curing system for said polymer consisting essentially of about 0.15 to 8.0 mole % of an aromatic primary diamine based on the ketone carbonyl groups or an equivalent amount of a precursor which will liberate free diamine under the cure conditions, and a catalytic amount of an acid having a pKa of at most about 3 or a precursor capable of liberating an equivalent amount of such acid under the cure conditions.
Dependencies are inferred from the claim text.