Powder coating composition

Claim 1

A powder coating composition which comprises: (a) a compound having at least two epoxy groups in the molecule; (b) a polyester or acrylic resin having a molecular weight of 1,000 to 7,000 and an acid value of not less than 20 having at least two carboxyl groups; and (c) a compound of the formula: ##STR4## wherein m and n are each an integer of from 1 to 10 5 provided that m≦n; R 1 is a residue of a mono or polybasic carboxylic acid (the number of the carboxyl groups n=1 to 10 5 ); and R 2 , R 3 , R 4 , and R 5 are, the same or different, each being an alkyl group having 1 to 30 carbon atoms substituted with a halogen, nitro group, an alkoxy group having 1 to 4 carbon atoms or furyl; a cycloalkylalkyl group having 6 to 10 carbon atoms; a cycloalkyl group having 5 to 8 carbon atoms substituted with a halogen, nitro group, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms or furyl; an aryl group having 6 to 20 carbon atoms, or a substituted aryl group having 6 to 20 carbon atoms substituted with a halogen, nitro group, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms or furyl; or an aralkyl group having 7 to 30 carbon atoms substituted with a halogen, nitro group, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms or furyl; or at least two of R 2 to R 5 forming, together with the nitrogen atom, a saturated or unsaturated heterocyclic group.