Hot Melt Wetness Indicator Adhesive Composition Containing UV Fluorescent Agent
AssigneeBostik SA
InventorChongyao Zhang
Life of this patent
Estimating the term…
Abstract
A wetness indicating adhesive composition comprising an adhesive base composition incorporating a fluorescing agent in the adhesive base composition that only fluoresces when wet, and not when dry. In one embodiment, the adhesive base composition may be composed of water soluble, or at least partially water soluble, components, and in another embodiment the adhesive base composition may be composed of water sensitive components as for example one or more water insoluble polymers and a surfactant. The fluorescing agent can either be dissolved or dispersed in the adhesive base composition, and is preferably a water soluble fluorescing agent that becomes visible under ultraviolet light only when an article such as a disposable diaper becomes wet.
Claims22
A hot melt wetness indicating adhesive composition comprising a blend of the following ingredients:
- a. a polymer or a blend of polymers in an amount of about 10% to 80% by weight;
- b. a tackifier or a blend of tackifiers in an amount of about 20% to 70% by weight;
- c. a surfactant or a blend of surfactants in an amount of about 0% to 30% by weight;
- d. a plasticizer or a blend of plasticizers in an amount of about 0 to 50% by weight;
- e. a wax or a blend of waxes in an amount of about 0% to 50% by weight;
- f. about 0 to 5% by weight of a stabilizer or antioxidant;
- g. a wetness indicating agent or a blend of wetness indicating agents in an amount of about 0 to 5% by weight;
- and
- h. a fluorescing agent or a blend of fluorescing agents that fluoresce only when wet and not when dry in an amount of 0.001% to 10% by weight.
- wherein the ingredients add up to 100% by weight of the composition.
Dependencies are inferred from the claim text.