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US 2022/0091080 A1Published application
Gas and/or chemical liquid indicator
AssigneeNitto Denko Corporation
InventorsKoichi Nakamura, Nahid Mohajeri
Life of this patent
Estimating the term…
Abstract
Described herein is an ammonia compound indicator comprising an adhesive and a chemochromic compound disposed therein. Also described are methods of making the aforedescribed elements and methods for indicating the presence of ammonia.
Claims21
1-25. (canceled)
A chemochromic indicator for detecting an ammonia compound comprising:
- a. A first adhesive layer;
- and
- b. a chemochromic copper compound, the copper compound disposed in the adhesive layer, wherein exposure to an ammonia compound changes the color of the adhesive layer.
A method for manufacturing a chemochromic indicator comprising the steps of:
- a. Dispersing hydrous or anhydrous CuSO4 in an organic solvent to create a dispersion;
- b. Sonicating the dispersion so as to create a copper slurry;
- c. Adding the copper slurry to a polymer so as to create a mixture;
- and
- d. Coating the mixture onto a backing layer or release liner for drying and curing.
2 more elements
Dependencies are inferred from the claim text.