Hot melt wetness indicator composition that includes a leuco dye, and articles including the same
View Patent ↗A hot melt wetness indicator composition that includes a water insoluble thermoplastic polymer, an anionic surfactant, a leuco dye, and a component selected from the group consisting of acid, rosin-based tackifying agent, plasticizer and combinations thereof, and is homogeneous is disclosed. The hot melt wetness indicator composition exhibits a color change after contact with water.
1. A hot melt wetness indicator composition comprising:
at least 5% by weight water insoluble thermoplastic polymer;
at least 3% by weight anionic surfactant;
leuco dye; and
at least 10% by weight of a component selected from the group consisting of acid, rosin-based tackifying agent, plasticizer, and combinations thereof, the component being other than the anionic surfactant and the thermoplastic polymer,
the hot melt wetness indicator composition being homogeneous and exhibiting a color change after contact with water.
2. The wetness indicator composition of claim 1 , wherein the composition comprises at least 5% by weight rosin-based tackifying agent.
3. The wetness indicator composition of claim 1 , wherein the composition comprises from about 10% by weight to no greater than 60% by weight rosin-based tackifying agent.
4. The wetness indicator composition of claim 1 , wherein the composition comprises at least 2% by weight acid.
5. The wetness indicator composition of claim 1 , wherein the composition comprises at least 2% by weight rosin acid.
6. The wetness indicator composition of claim 1 , wherein the composition comprises at least 5% by weight plasticizer.
7. The wetness indicator composition of claim 1 , wherein the composition comprises at least two components selected from the group consisting of acid, rosin-based tackifying agent, and plasticizer, the rosin-based tackifying agent being different from the acid.
8. The wetness indicator composition of claim 1 , wherein the composition comprises at least about 15% by weight rosin-based tackifying agent, plasticizer, or a combination thereof.
9. The wetness indicator composition of claim 1 , wherein the composition comprises at least about 15% by weight plasticizer, acid, or a combination thereof.
10. The wetness indicator composition of claim 1 , wherein the composition comprises acid, plasticizer, and rosin-based tackifying agent, the rosin-based tackifying agent being different from the acid.
11. The wetness indicator composition of claim 1 , wherein the composition comprises from about 10% by weight to no greater than 90% by weight of the water insoluble thermoplastic polymer.
12. The wetness indicator composition of claim 1 , wherein the composition comprises from about 10% by weight to no greater than 65% by weight of the water insoluble thermoplastic polymer.
13. The wetness indicator composition of claim 1 , wherein the composition exhibits a viscosity of from about 1000 cP to no greater than about 20,000 cP at 110° C.
14. The wetness indicator composition of claim 1 , wherein the composition comprises from about 5% by weight to no greater than about 30% by weight anionic surfactant.
15. The wetness indicator composition of claim 1 , wherein the composition remains homogeneous when maintained at 110° C. for 1 day.
16. The wetness indicator composition of claim 1 , wherein the composition remains homogeneous when maintained at 110° C. for 2 days.
17. The wetness indicator composition of claim 1 further comprising a colorant other than the leuco dye.
18. The wetness indicator composition of claim 17 , wherein the composition exhibits a blue color when contacted with water.
19. A disposable absorbent article comprising:
a first substrate; and
the hot melt wetness indicator composition of claim 1 disposed on the first substrate.