Bleaching and dyeing; fluid treatment and chemical modification – Chemical modification of textiles or fibers or products thereof – Treating textiles or fibers from synthetic resin or natural...
Patent
1989-01-31
1991-04-23
Clingman, A. Lionel
Bleaching and dyeing; fluid treatment and chemical modification
Chemical modification of textiles or fibers or products thereof
Treating textiles or fibers from synthetic resin or natural...
811551, 81156, 252 86, 252 87, D06M 1100
Patent
active
050096672
ABSTRACT:
Self neutralizing compositions and methods for their use are disclosed for treating polyamide fibers, such as nylon or wool carpeting, to render them stain resistant. The compositions are aqueous solutions carbonated to an appropriate acid pH containing one or more dye-resist agents which are condensation products of formaldehyde and a sulfonated naphthol or phenol. When the carbon dioxide escapes or evaporates subsequent to application, the pH rises to about neutral leaving the dye-resist agent ionically bonded to the polyamide fibers. An appropriate amount of a fluorochemical may also be contained in the solution which also physically interacts with the fibers and deters yellowing caused by the presence of the dye-resist agents. The process can be carried out during one or more cleaning, rinsing or subsequent finishing or protectant steps. In each step, the carbonated solution is applied under pressure at a pH of between about 2.5 and 7.0 and preferably between 3.5 and 6.5.
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Beck Boyd R.
Harris Robert D.
Clingman A. Lionel
Harris Research Inc.
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