POLYESTER RESIN COMPOSITION FOR HOT MELT ADHESIVE

To provide a polyester resin for hot melt which is excellent in adhesion to various base materials, dispenses with a resin mixing step, has a high crystallization rate, is excellent in heat resistance, and is excellent in hydrolysis resistance, flexibility and workability.SOLUTION: A polyester resin for hot melt adhesive is obtained by a monomer that contains an acid component containing an aromatic dicarboxylic acid and an aliphatic acid and an alcohol component containing aliphatic dihydric alcohol and polyether polyol, in which the acid component contains 50-85 mol% of the aromatic dicarboxylic acid and 15-50 mol% of the aliphatic acid based on the total molar number of the acid component, and the alcohol component contains 90-98 mol% of the aliphatic dihydric alcohol and 2-10 mol% of the polyether polyol based on the total molar number of the alcohol component.SELECTED DRAWING: None 【課題】種々の基材への接着性に優れ、樹脂の混合工程を必要とせず、高い結晶化速度を有し、耐熱性に優れ、ならびに耐加水分解性、柔軟性、および加工性に優れた、ホットメルト用ポリエステル樹脂の提供。【解決手段】芳香族ジカルボン酸および脂肪族酸を含む酸成分と、脂肪族二価アルコールおよびポリエーテル系ポリオールを含むアルコール成分とを含み、前記酸成分は、前記酸成分の総モル数に基づいて、５０ないし８５モル％の前記芳香族ジカルボン酸および１５ないし５０モル％の前記脂肪族酸を含み、前記アルコール成分は、前記アルコール成分の総モル数に基づいて、９０ないし９８モル％の前記脂肪族二価アルコールおよび２ないし１０モル％の前記ポリエーテル系ポリオールを含む単量体を重合して得られる、ホットメルト接着剤用ポリエステル樹脂。【選択図】なし