Chain extenders
AssigneeAlbemarle Corporation
InventorsPaul L. Wiggins, John Y. Lee, Judit Orgad, David W. Owens
Life of this patent
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Abstract
This invention provides chain extender compositions. These compositions comprise (i) an aliphatic secondary diamine, and (ii) a component selected from the group consisting of: (a) a cycloaliphatic primary diamine; (b) an aliphatic secondary diamine; (c) an aliphatic secondary diamine and an aliphatic primary diamine; (d) an aliphatic diimine; and (e) a combination of any two or more of (a) through (d), with the proviso that when (ii) is (a), (i) is a noncyclic aliphatic secondary diamine. Processes for producing polyurethanes, polyureas, and polyurea-urethanes are also provided.
Claims18
A chain extender composition which comprises
- (i) N,N′-di-(3,3-dimethyl-2-butyl)-1,6-diaminohexane, and
- (ii) a cycloaliphatic primary diamine,
- wherein the relative proportions of N,N′-di-(3,3-dimethyl-2-butyl)-1,6-diaminohexane to cycloaliphatic primary diamine in the chain extender composition are in the range of about 5.7:1 to about 3:1 on a weight basis.
A process for producing a polymer, which process comprises mixing together (A) at least one aliphatic polyisocyanate, (B) at least one polyol and/or at least one polyetheramine, and (C) a chain extender comprised of
- (i) N,N′-di-(3,3-dimethyl-2-butyl)-1,6-diaminohexane, and
- (ii) a cycloaliphatic primary diamine,
- wherein the relative proportions of N,N′-di-(3,3-dimethyl-2-butyl)-1,6-diaminohexane to cycloaliphatic primary diamine in the chain extender composition are in the range of about 5.7:1 to about 3:1 on a weight basis.
A polymer formed from ingredients comprising (A) at least one aliphatic polyisocyanate, (B) at least one polyol and/or at least one polyetheramine, and (C) a chain extender comprised of
- (i) N,N′-di-(3,3-dimethyl-2-butyl)-1,6-diaminohexane, and
- (ii) a cycloaliphatic primary diamine,
- wherein the relative proportions of N,N′-di-(3,3-dimethyl-2-butyl)-1,6-diaminohexane to cycloaliphatic primary diamine in the chain extender composition are in the range of about 5.7:1 to about 3:1 on a weight basis.
Dependencies are inferred from the claim text.