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AssigneeDsm N.V.
InventorsRudolfus A.T.M. Van Benthem, Johan Rietberg, Dirk A.W. Stanssens
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The invention relates to a linear or branched polymer containing ester groups and at least one amidegroup in the backbone, having hydroxyalkylamide end groups and having a weight average molecular mass of ≧800 g/mol. The invention also relates to an entirely or partly modified polymer. The polymer according to the invention can for example be obtained by reaction of a cyclic anhydride and an alkanolamine to form a β-hydroxyalkylamide, after which a polyesteramide is obtained through polycondensation. The polymers according to the invention can, for example, be used in thermosetting powder-paint compositions.
A branched condensation polymer containing ester groups and at least one amide group in the backbone, having at least one β-substituted β-hydroxyalkylamide end group, having a hydroxylalkylamide functionality between 2 and 250 and having a weight average molecular mass of ≧800 g/mol.
Modified polymer that can be obtained through a reaction between a polymer according to any one of formulas (III), (IV) or (V) with a monomer, oligomer or polymer containing reactive groups that can react with hydroxyalkylamine.
Modified polymer according to any one of formulas (III), (IV) or (V) in which
Powder-paint binder composition containing a polymer according to any one of claims 1-9 or 15-16 or a polymer obtained according to any one of claims 10-14.
Binder composition according to claim 17 which additionally contains a crosslinker comprising at least one linear or branched aliphatic chain with 5-26 carbon atoms and having an epoxy functionality of more than 1, with the proviso that the epoxy groups are carried on the at least one aliphatic chain.
Powder paint composition comprising a binder composition according to any one of claims 17-18.
Powder coating obtained by curing of a powder paint according to claim 19.
Entirely or partly coated substrate, characterized in that the coating is a powder coating according to claim 20.
Dependencies are inferred from the claim text.