Patent ID: 7829643

Claim:
A coating composition comprising a1) physically drying film forming binder resin or resins; a2) thermally cross linking film forming binder resin or resins; a3) radiation curable film forming binder resin or resins; a4) autoxidatively drying film forming binder resin or resins; or a5) a combination of binder resins with at least two different crosslinking mechanisms selected from a1), a2), a3) and a4); b) a polymer or copolymer levelling agent of formula (I) In-[(M) x -(E) y ] n (I) obtained by b1) polymerization in the presence of an alkoxyamine initiator/regulator of formula b2) polymerization in the presence of a stable nitroxyl free radical of formula wherein In is the initiator fragment starting the polymerization reaction; M is at least one monomer selected from the group consisting of acrylic acid, methacrylic acid, acrylic acid (C 1 -C 22 )alkyl esters, acrylic acid (C 1 -C 22 )hydroxyalkyl esters, methacrylic acid (C 1 -C 22 )alkyl esters, methacrylic acid (C 1 -C 22 )hydroxyalkyl esters, acrylic acid (C 1 -C 22 )alkyl esters or methacrylic acid (C 1 -C 22 )alkyl esters which are substituted by amino, (C 1 -C 22 )alkylamino, (C 1 -C 22 )dialkylamino, —SO 3 H, epoxy, fluoro, perfluoro or siloxane groups, styrene, substituted styrene, acrylamide and methacrylamide, N-mono(C 1 -C 22 )alkyl acrylamide, N,N-di(C 1 -C 22 )alkyl acrylamide, and a multifunctional monomer with two or more ethylenically unsaturated bonds; provided that the amount of unsubstituted acrylic acid (C 1 -C 22 )alkyl esters or/and methacrylic acid (C 1 -C 22 )alkyl esters is more than 30% by weight based on the weight of the total monomer mixture; E is a group bearing the stable nitroxyl free radical which is bound via the oxygen atom to the polymer or copolymer; x is the total number of monomer units, which is a number between 5 and 5000; y is a number 1 or greater than 1 indicating the average number of end groups E attached to the monomer sequence (M) x ; n is a number from 1 to 20; and c) optionally water or/and one or more organic solvents.