Controlled release dual walled microcapsules

Microcapsules whose shell wall comprises both melamine resin and (meth)acrylate polymer wherein the melamine resin is derived from a first aqueous phase and the (meth)acrylate polymer is derived from a second aqueous phase, said (meth)acrylate polymer comprising the reaction product of (a) at least one water soluble or dispersible multifunctional (meth)acrylate monomer or oligomer alone or in combination with (b) at least one water soluble or dispersible mono- and/or di-functional (meth)acrylate and/or (c) at least one water soluble or dispersible simple base, wherein said shell wall is formed by the sequential polymerization of the wall forming materials of the two aqueous phases, one aqueous phase, either the first aqueous phase or the second aqueous phase, being subjected to wall forming conditions to form a first microcapsule wall before the other aqueous phase is subjected to wall forming conditions to effect deposition and polymerization of the second wall forming material upon the first microcapsule wall.