Surface modified microcapsules

A method of preparing a microcapsule composition comprising the steps of:

• (a) providing a microcapsule slurry containing a plurality of microcapsules, in which each microcapsule has a microcapsule core and a microcapsule wall encapsulating the microcapsule core, and the microcapsule wall, having an inner surface and an outer surface, is formed of an encapsulating polymer having a primary or secondary amine group,
• (b) providing a deposition agent having a reactive group, and
• (c) forming a covalent bond between the primary or secondary amine group and the reactive group to graft the deposition agent to the encapsulating polymer on the outer surface of the microcapsule wall to obtain a surface-modified microcapsule,
• wherein the deposition agent contains a quaternary ammonium moiety, an oxoimidazolidinyl moiety, a catechol moiety, a carboxylic moiety, an alkyl moiety, or a combination thereof, and the microcapsule core contains a fragrance, and
• wherein the covalent bond is an amine bond (N—C), an imine bond (N═C), an ether bond (O—C), an amide bond (—C(O)N—), or an ester bond (—C(O)O—).