Hot melt wetness indicator adhesive composition

A - Human Necessities – 61 – L

Patent

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Details

A61L 15/58 (2006.01) A61L 15/18 (2006.01) A61L 15/24 (2006.01) A61L 15/34 (2006.01) A61L 15/48 (2006.01) A61L 15/56 (2006.01) C09J 11/02 (2006.01) C09J 133/08 (2006.01) C09J 193/04 (2006.01)

Patent

CA 2420454

The present invention is directed towards a hot melt wetness indicator composition based on an ethylene-alkylacry-late-acrylic acid terpolymer. The wetness indicator composition comprises the terpolymer, a tackifying resin, a compatible surfactant having a HLB value less than 20 and a pH indicator or a dye that is capable of changing color when insulted with urine, as the primary ingredients. One embodiment of the present invention is to provide a wetness indicator that has excellent heat and environmental stability, improved fastness, vivid color change, easy manufacturing, and easy application. Another embodiment is directed towards a composition having a delayed response and therefore can withstand multiple insults daily.

L'invention concerne une composition adhésive thermofusible indicatrice d'humidité contenant un terpolymère acide acrylique-acrylate d'alkyle-éthylène. Ladite composition contient en tant qu'éléments primaires : ledit terpolymère, de la résine collante, un agent de surface compatible dont la valeur HLB (balance-hydrophile-lipophile) est inférieure à 20, ainsi qu'un indicateur de pH ou bien un colorant qui peut changer de couleur lorsqu'il est attaqué par de l'urine. Un mode de réalisation selon l'invention porte sur un indicateur d'humidité qui présente une excellente stabilité à la chaleur et à l'environnement, une résistance accrue, un changement net de couleur, et peut être aisément fabriqué et appliqué. Un autre mode de réalisation concerne une composition à réponse retardée, ce qui permet de résister aux nombreuse attaques quotidiennes.

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