Encapsulated amine blocked isocyanates

An aqueous dispersion of a capsule composed of a polymeric shell surrounding a core, the core containing an amine blocked isocyanate according to General Structure II:

• wherein
• R1 and R2 each independently represent a substituted or unsubstituted primary, secondary, or tertiary alkyl group, with the proviso that at least one of R1 and R2 represents a substituted or unsubstituted secondary or tertiary alkyl group and that R1 and R2 are not both a tertiary alkyl group,
• L represents an n+1 valent linking group selected from a group comprising no more than 40 carbon atoms and an oligomeric group selected from an oligo-ether, an oligo-ester, an oligo-carbonate, a butadiene oligomer, a hydrogenated butadiene oligomer, an isoprene oligomer, a silicone oligomer, and mixture thereof, and
• n represent an integer from 1 to 5.