Joint compounds and plasters with a complexometric dye and methods
AssigneeUnited States Gypsum Company
InventorsAlexander Donovan, Joseph Schlude
Life of this patent
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Abstract
A building construction product comprising an ionochromic dye, wherein the building construction product has a first color when the product comprises water, wherein the first color is dependent on the presence of metal ions in solution in the product; and wherein the product has a second color when the product has solidified. Methods of monitoring setting and drying reactions of building construction products, including setting-type and drying-type joint compounds and plasters.
Claims20
A building construction product comprising an ionochromic dye, wherein the building construction product has a first color when the product comprises water, wherein the first color is dependent on the presence of metal ions in solution in the product;
- and wherein the product has a second color when the product has solidified.
A method of applying a building construction product which comprises water, the method comprises:
- mixing the building construction product with an ionochromic dye and thereby obtaining a mixture of the building construction product comprising an indicator, wherein the mixture develops a first color, and wherein the development of the first color is dependent on the presence of metal ions.
A method for monitoring a ready-mixed setting joint compound, the method comprising formulating the ready-mixed setting joint compound with at least one ionochromic dye which comprises a reversible chelator of calcium ions and monitoring the compound for a change in color, wherein the change in color is indicative of premature activation of a setting reaction.
An accessory product comprising an ionochromic dye which comprises a reversible chelator of calcium ions and optionally further comprising a solvent, wherein the accessory product is provided in a package in a form of a container or a pouch, and wherein the amount of the ionochromic dye is dosed per the package.
Dependencies are inferred from the claim text.