04699812 is referenced by 16 patents and cites 3 patents.

Fibers containing free amino groups, and especially polyamide fibers, can be made resistant to certain stains, especially those resulting from food grade dyes, by contacting the fiber with a solution of an aliphatic sulfonic acid containing 8 to 24 carbon atoms. Branched chain aliphatic sulfonic acids are more effective than the linear aliphatic sulfonic acids, and branching at the carbon bearing the sulfonic acid group is more effective than branching at any other carbon. Contacting the fiber with the solution of the aliphatic sulfonic acid needs to be done under acidic conditions, most preferably at a pH between 0.5 to 5.0.

Title
Imparting stain resistance to certain fibers
Application Number
6/935873
Publication Number
4699812
Application Date
November 28, 1986
Publication Date
October 13, 1987
Inventor
Thomas P Malloy
Lake Zurich
IL, US
Stephen A Munk
Chicago
IL, US
Agent
Eugene I Snyder
John F Spears Jr
Thomas K McBride
Assignee
Allied Corporation
NJ, US
IPC
B05D 3/02
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