US 2024/0376353 A1 · TWO-COMPONENT STRUCTURAL ADHESIVE

Abstract

Provided herein is a two-component adhesive composition showing excellent adhesive strength after heat and humidity exposure.

Dependent claims

A two-component epoxy adhesive composition comprising:

Component A comprising:
ai) at least one epoxy resin;
and
aii) a reactive toughener made by reacting at least one polyol selected from poly(alkylene oxide)diol, and poly(butadiene)diol with a polyisocyanate in the presence of a polyurethane catalyst, optionally followed by chain extension with a di-phenol, and end-capping with a molecule of Formula I:
where R1 and R2 are independently selected from hydrogen and C1 to C6 alkyl, n is an integer from 1 to 2, and R3 is C1 to C6 alkyl;
and
Component B comprising:
bi) one or more polyamines;
bii) optionally one or more latent epoxy curing agents;
and
biii) one or more epoxy curing catalysts.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application

18/683,166Filed 8 Jul 2022

Priority

30 Aug 2021

Published

14 Nov 2024

Term ends

Not estimatedThe source records don’t support an estimate.

C08G 18/4063
Two or more macromolecular compounds not provided for in one single group of groups C08G18/42 - C08G18/64: mixtures of compounds of group…
C09J 11/08
Features of adhesives not provided for in group C09J9/00, e.g. additives: macromolecular additives
C08G 18/10
Processes: prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
C08G 18/12
Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step: using…

Provided herein is a two-component adhesive composition showing excellent adhesive strength after heat and humidity exposure.

Dependent claims

A two-component epoxy adhesive composition comprising:

Component A comprising:
ai) at least one epoxy resin;
and
aii) a reactive toughener made by reacting at least one polyol selected from poly(alkylene oxide)diol, and poly(butadiene)diol with a polyisocyanate in the presence of a polyurethane catalyst, optionally followed by chain extension with a di-phenol, and end-capping with a molecule of Formula I:
where R1 and R2 are independently selected from hydrogen and C1 to C6 alkyl, n is an integer from 1 to 2, and R3 is C1 to C6 alkyl;
and
Component B comprising:
bi) one or more polyamines;
bii) optionally one or more latent epoxy curing agents;
and
biii) one or more epoxy curing catalysts.

8 more elements

Dependencies are inferred from the claim text.