Rapid curing epoxy adhesive compositions
Assignee3M Innovative Properties Company
InventorSohaib Elgimiabi
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Abstract
The present disclosure is directed to a curable composition comprising: a) an epoxy resin; b) an epoxy curing agent comprising at least one cycloaliphatic amine; c) at least 3 wt % of a metal triflate catalyst; d) optionally, a fatty acid polyamide; and e) optionally, a filler material. The compositions of the present disclosure are particularly suitable for use in structural assembly, in particular for potting and filling operations in sandwich structures. The present disclosure also relates to a composite assembly and to methods of using such epoxy resin based curable compositions.
Claims14
A curable honeycomb-filling composition comprising:
- a) an epoxy resin;
- b) an epoxy curing agent comprising at least one cycloaliphatic amine;
- c) at least 5.5 wt % of a metal triflate catalyst;
- d) optionally, a fatty acid polyamide;
- and
- e) optionally, a filler material,
- wherein the curable honeycomb-filling composition provides a time to reach Shore D≥50 of less than 90 min when measured at 23° C. according to the test method described in the experimental section and further has an extrusion rate of at least 20 g/min when being extruded at a temperature of 23° C. and a pressure of 5 bar for 60 seconds through a circular aperture having a diameter of 4.0 mm, and further wherein the curable honeycomb-filling composition is free of polymeric toughening agents.
Dependencies are inferred from the claim text.