| 摘要 |
PROBLEM TO BE SOLVED: To provide polyester resin compositions for powder coating materials which excel in weatherability and can form coating films having excellent external appearance, strength and processability even when thick film coating is effected, and powder coating materials using the same. SOLUTION: The polyester resin compositions for powder coating materials comprise a polyester resin composed of an acid component having terephthalic acid as the major component and an alcohol component comprising 80-100 mol% neoopentyl alcohol and having a melt viscosity at 150 deg.C of 3,500-6,000 dPa.s, an intrinsic viscosity of 0.25-0.4 dl/g, and a hydroxyl number of 20-45 mgKOH/g and a uretodione bonding type isocyanate based curing agent.
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