US 12,655,332 B2 · Two-part epoxy-based structural adhesive composition

Abstract

The present invention relates to a two-part epoxy-based structural adhesive composition, comprising a first part and a second part, the first part comprising: i) a first aromatic difunctional epoxy resin having an epoxide equivalent weight (EEW) of less than 400 g/eq, ii) a second aromatic difunctional epoxy resin having an epoxide equivalent weight of from 400 g/eq to 3000 g/eq, and iii) a shell-core toughening agent; the second part comprising: I) a non-aromatic polyetheramide amine and II) an alicyclic amine. Moreover, the present invention also relates to a method for bonding substrates using the adhesive composition and an article bonded with the cured product of the adhesive composition and use of the composition in assembly of articles.

Claims17

Dependent claims

A two-part epoxy-based structural adhesive composition comprising:

a first part comprising:
i) a first aromatic difunctional epoxy resin having an epoxide equivalent weight of less than 400 g/eq, comprising a bisphenol F epoxy resin and another epoxy resin,
ii) a second aromatic difunctional epoxy resin having an epoxide equivalent weight of from 400 g/eq to 3000 g/eq, and
iii) a shell-core toughening agent;
and
a second part comprising:
I) a non-aromatic polyetheramide amine, and
II) an alicyclic amine, wherein the second aromatic difunctional epoxy resin is present in the first part in an amount of 1 wt. % to 10 wt. % based on the total weight of the first part.

5 more elements

Dependencies are inferred from the claim text.

Two-part epoxy-based structural adhesive composition

Life of this patent

Two-part epoxy-based structural adhesive composition

Life of this patent

Abstract

Claims17