Patent ID: 8546509

Claim:
Functionalized particles having fully formed outer shells and cores comprising a polyurethane or polyurea matrix said outer shells obtained by interfacial addition polymerisation of (i) at least one partially blocked polyisocyanate obtained by the reaction of a polyisocyanate with 10 to 15 mol % total, based on the stoichiometric amount of isocyanate groups contained within the polyisocyanate of a blocking group precursor selected from an active methylene compound, a bisulfite, a phenol, a pyridinol, a thiophenol, a mercaptopyridine, a mercaptane, an oxime, an amide, a cyclic amide, an imide, an imidazole, an amidine, a pyrazole, a triazole, a siloxane and a benzoxazolone and (ii) at least one polyamine or polyhydric alcohol, said fimetionalized particles being capable to chemically or physically bind to a substrate.