Two-part epoxy adhesives with improved flexibility and process for making and using same
AssigneeIllinois Tool Works Inc.
InventorZakar Raffi Hachikian
Life of this patent
Estimating the term…
Abstract
A two-part epoxy adhesive having a resin component containing a mixture of an epoxy resin and an internally flexibilized epoxy resin and a hardener component containing a mixture of a flexibilizer and an unmodified or modified aliphatic amine, an unmodified or modified polyamide, or combinations thereof. The resin component and hardener component are mixed and applied to substrates, or applied to substrates and mixed, and then allowed to cure yielding a cured epoxy resin having a tensile elongation at room temperature of greater than 30%. The initial curing time is less than 3 hours.
Claims46
A two-part epoxy adhesive comprising:
- a) a resin component comprising a mixture of epoxy resin and an internally flexibilized epoxy resin, and
- b) a hardener component comprising a mixture of a flexibilizer and an unmodified or modified aliphatic amine, an unmodified or modified polyamide, or combinations thereof,
- wherein after said resin component and said hardener component are mixed and reacted the cured epoxy adhesive has a tensile elongation at room temperature of greater than 30%.
The process of adhering at least two substrate surfaces to each other comprising:
- intercalating between said surfaces an adhesive comprising a reactive mixture of:
- a) a resin component comprising a mixture of epoxy resin and internally flexible epoxy resin, and
- b) a hardener component comprising a mixture of a flexibilizer and an unmodified or modified aliphatic amine, an unmodified or modified polyamide, or combinations thereof,
- and allowing said adhesive to cure, whereby said cured adhesive has a tensile elongation at room temperature of greater than 30%.
A process for making a two-part epoxy adhesive comprising:
- preparing a resin component by mixing an epoxy resin, an internally flexibilized epoxy resin, a plasticizer/accelerator, a coupling agent, fillers, and a thixotropic agent, and
- preparing a hardener component comprising a mixture of a flexibilizer, an unmodified or modified aliphatic amine, or unmodified or modified polyamide, or combinations thereof, a plasticizer/accelerator, an accelerator, and a thixotropic agent.
Dependencies are inferred from the claim text.