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Main.COATINGS.Organic Coatings.Powder Coatings.Crosslinking Agent.Beta-HydroxyAlkylamide..Blocked PolyIsocyanate. Combi..Co.: USA. D.Patent.Claims Etc.Claim 1: Powder Coating Material.with CrossLinkers comprising.HydroxyAlkylamides &.Blocked PolyIsocyanates, comprising.A) Acidic Polymer (20-99%); B).Beta-HydroxyAlkylamide (1-25%); C).Blocked NonAromatic PolyIsocyanate.(0.05-10%) NCO Functionality..gtoreq.2; Wherein (A) Select:.PolyEster Resin Tg=30-85C &.Acid No.=20-80 mg KOH/g. Claim 4:.(C) (Cyclo)Aliphatic PolyIsocyanate.Contg > 2 NCO Groups. Claim 5:.(C) PolyIsocyanate Comp. Select:.2-Me-Pentamethylene 1,5-DiIsocyanat.e Etc. Claim 6: (C) Blocking Agent.Select: Acetone Oxime Etc. Claim 7:.(C) Chain-Extended by Trimerization.Etc. Claim 8: Leveling Agents Etc.Claim 9: Catalysts Concn=0.03-1%.Claim 10: Catalyst Select:.Aluminum Carboxylate Salts Etc.Patent Assignee |