Amine-terminated oxamide curatives
Assignee3M Innovative Properties Company
InventorsKolby L. White, Gregory P. Sorenson, Matthew J. Kryger
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Abstract
A two-part curable composition is provided that includes a first part that includes an oxamido-containing compound and a second part that includes an epoxy resin. The oxamido-containing compound includes at least one first segment derived from a first polyamine and at least one second segment derived from a second polyamine that is different than the first polyamine. The oxamido-containing compound has at least two amino (—NH2) groups that can react with the epoxy resin in the second part of the curable composition. Each part of the curable composition is flowable, often at room temperature or slightly above room temperature, and can be mixed to form a cured composition having structural bonding performance.
Claims15
A two-part curable composition comprising:
- a) a first part comprising an oxamido-containing compound with at least two —NH2 groups, the oxamido-containing compound comprising at least one group of Formula (I) and at least one group of Formula (II)
- wherein
- R1 is the residue of a first polyamine of formula H2N—R1—NH2 minus two —NH2 groups, wherein in Formula (I) R1 is a (hetero) hydrocarbylene having a first carbon atom bonded to a first-NH group and a second carbon atom boned to a second —NH— group where the first carbon atom and the second carbon atom are each independently a tertiary carbon atom or a quaternary carbon atom;
- R2 is the residue of a second polyamine H2N—R2—NH2 minus two —NH2 groups, wherein the second polyamine is different than the first polyamine and wherein R2 in Formula (II) is a (hetero) hydrocarbylene having a first carbon atom bonded to a first —NH— group and a second carbon atom boned to a second —NH— group where the first carbon atom and the second carbon atom are each a secondary carbon atom;
- an asterisk (*) indicates an attachment site to another group in the oxamido-containing compound;
- and
- b) a second part comprising an epoxy resin.
Dependencies are inferred from the claim text.