Method and solution for the room temperature dyeing of nylon
AssigneeThe Boeing Company
InventorsJames W. Kane, Richard J. La Conte
Life of this patent
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Abstract
A method for color dyeing nylon articles and the like utilizing a room temperature dye solution comprises mixing a dyestuff with formic acid to form a dye solution such that the final solution contains 30-60% formic acid in an aqueous solution by volume, applying said dye solution to the area of the nylon article to be colored, and after the dye solution has remained on said article for a predetermined length of time, rinsing the article.
Claims9
An improved method for color dyeing nylon articles and the like utilizing a room temperature dye solution, comprising the steps of:
- applying an aqueous dye solution consisting essentially of an acid dye and 30%-60% formic acid by volume to the area of the nylon article to be colored whereby acceptable color density is achieved in one to three minutes, and without a fixing step, rinsing said article with water.
An aqueous dye solution consisting essentially of on a weight basis:
- 2.7 percent acid dye, and
- 97.3 percent 40-60% formic acid in an aqueous solution by volume.
An aqueous dye solution consisting essentially of dye and formic acid in the proportion:
- 1gram powder acid dye to
- 48 cubic centimeters of 30-60% formic acid by volume.
An aqueous dye solution consisting essentially of dye and formic acid in the proportion:
- 1 gram powder acid dye to
- 48 cubic centimeters of 55-59% formic acid by volume.
An aqueous dye solution consisting essentially of dye and formic acid in the proportion by volume:
- 1 part liquid acid dye to
- 2 parts 88-90% formic acid by volume.
Dependencies are inferred from the claim text.