Curable epoxy compositions
Assignee3M Innovative Properties Company
InventorMathis A. Muth
Life of this patent
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Abstract
Curable epoxy compositions, their cured compositions, and uses for such cured compositions are described. The curable epoxy compositions include a boron tri-halide accelerator and a curing system including one or more crosslinking agents. The crosslinking agent(s) include at least two primary amine groups and at least one tertiary amide group. The primary amine groups and the tertiary amide groups may be present on the same crosslinking agent or may be present on different crosslinking agents.
Claims19
A curable composition comprising one or more epoxy resins, a boron tri-halide complex accelerator, and a curing system comprising one or more crosslinking agents, the crosslinking agent(s) comprising at least two primary amine groups and at least one tertiary amide group;
- wherein the composition is substantially free of anhydride groups.
A curable composition comprising:
- (a) one or more epoxy resins;
- (b) 4 to 10 parts by weight of the boron tri-halide complex accelerator per 100 parts by weight of the epoxy resins;
- (c) a curing system comprising a polyether-amido-amine curing agent comprising both at least two primary amine groups and at least one tertiary amide group;
- wherein the composition comprises 2 to 8 parts by weight, inclusive, of the crosslinking agent per 100 parts by weight of the epoxy resins;
- wherein the ratio of moles of primary amine groups to moles of tertiary amide groups included in the crosslinking agents of the curing system is from 5:1 to 10:1, inclusive;
- and
- wherein the composition comprises no greater than 0.05 equivalents of anhydride groups per equivalent of epoxy groups.
14-15. (canceled)
Dependencies are inferred from the claim text.