It has been discovered that amorphous polybutene copolymers that have a softening point of from about 70 to about 105° C. and viscosity of less than about 1,900 cP at 190° C. possesses desirable properties and may be used to make a low application temperature hot melt adhesive for disposable absorbent articles.軟化点が約70~約105℃で190℃の粘度が約1,900cP未満である非晶質ポリブテンコポリマーが望ましい性質をもち、使い捨て吸収性製品用の低塗布温度のホットメルト接着剤の製造に使用できることが明らかとなった。