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Main.COATINGS.Organic Coatings.Powder Coatings.Crosslinking Agent.Blocked PolyIsocyanates.Co.: USA. D.Patent.Claims Etc.Claim 1: PolyUrethane Powder Coatin.g 1,2,4-Triazole-Blocked PolyIsocya.nate (I) & Hydroxyl PolyEster (II);.(I): Physical Mixt. of.Aliphatic Biuret-Funct DiIsocyanate.& (Cyclo)Aliphatic Isocyanurate.Funct. DiIsocyanate; Wherein.Isocyanate Groups are Blocked.such that 0.5-1 mol 1,2,4-Triazol/.Isocyanate Equiv. & (II) has.Functionality of .gtoreq.2, on OH.No.=30-150 mg of KOH/g;.Viscosity <40,000 mPa.multidot.s at.160C & MP=75-100C. Assignee |