Self-healing adhesive composition

Abstract

A self-healing adhesive composition comprising a homogeneous mixture of: (i) a self-healing polymer containing hydrogen bonding groups or long-chain alkyl groups, wherein said hydrogen bonding groups comprise hydrogen bond donating groups and hydrogen bond accepting groups, and wherein said long-chain alkyl groups contain at least four carbon atoms; and (ii) an extrudable adhesive polymer base having a curable property and no self-healable property; wherein component (i) is present in the self-healing adhesive composition in an amount of at least 10 wt % and up to 70 wt % of the total of components (i) and (ii). Also described herein is a method of sealing a space (e.g., crack, gap, or pores) in a substrate material by at least partially filling the space with the self-healing adhesive composition described above and permitting the self-healing adhesive composition to harden over time without applying an external stimulus to induce hardening.