POWDER COATING COMPOSITION
To provide a powder coating composition excellent in adhesion to a substrate and substrate followability.SOLUTION: The powder coating composition is provided which contains: a resin (a-1) having a hydroxyl group or a resin (a-2) having a glycidyl group; and a polyester resin (B) (excluding the resin...
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Format: | Patent |
Sprache: | eng ; jpn |
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Zusammenfassung: | To provide a powder coating composition excellent in adhesion to a substrate and substrate followability.SOLUTION: The powder coating composition is provided which contains: a resin (a-1) having a hydroxyl group or a resin (a-2) having a glycidyl group; and a polyester resin (B) (excluding the resin (a-1) having a hydroxyl group). The polyester resin (B) contains a constituent unit (b-1) derived from a polybasic acid and a constituent unit (b-2) derived from a polyhydric alcohol. The constituent unit (b-2) derived from a polyhydric alcohol contains 20 mol% or more and 100 mol% or less of a constituent unit derived from hydrogenated bisphenol A. The polyester resin (B) has a number average molecular weight of 500-4,500 and an acid value of 5-300.SELECTED DRAWING: None
【課題】本発明は、基材密着性と基材追従性に優れる粉体塗料組成物に関するものである。【解決手段】水酸基を有する樹脂(a−1)、またはグリシジル基を有する樹脂(a−2)とポリエステル樹脂(B)(水酸基を有する樹脂(a−1)を除く)とを、含有する粉体塗料組成物であって、前記ポリエステル樹脂(B)は、多塩基酸に由来する構成単位(b−1)と、多価アルコールに由来する構成単位(b−2)とを含み、前記多価アルコールに由来する構成単位(b−2)は、水素化ビスフェノールAに由来する構成単位を20モル%以上100モル%以下含有し、ポリエステル樹脂(B)は、数平均分子量500〜4,500、酸価5〜300 である、粉体塗料組成物を提供する。【選択図】なし |
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