Composition and method for providing stain resistance to polyamide fibers using carbonated solutions

Claim 1

An aqueous carbonated composition for treating polyamide fibers to impart stain resistance to said fibers consisting essentially of (a) between about 0.0015 to 1.5% w. of a dye-resist agent consisting of a condensation product of formaldehyde and a member selected from the group consisting of a sulfonated phenol or a sulfonated naphthol; (b) 0 to 6.0% w. of a fluorochemical; and (c) 0 to 5% w. of a detergent suitable for cleaning polyamide fibers with the remainder being made up of an inert aqueous carrier; said aqueous composition being maintained at a pH of between about 2.5 and 7.0 be means of said carbonation.

Claim 12

A method of imparting stain resistance to polyamide fibers having free amino groups which comprises applying to said polyamide fibers an effective amount of an aqueous carbonated solution consisting essentially of (a) between about 0.0015 to 1.5% w. of a dye-resist agent consisting of a condensation product of formaldehyde and a member selected from the group consisting of a sulfonated phenol or a sulfonated naphthol; (b) 0 to 6.0% w. of a fluorochemical; and (c) 0 to 5% w. of a detergent suitable for cleaning polyamide fibers with the remainder being made up of an inert aqueous carrier; said aqueous composition being maintained at a pH of between about 2.5 and 7.0 by means of said carbonation whereby said dye-resist agent is caused to react with said free amino groups on said fibers rendering said amino groups unavailable for reaction with dyes.

Claim 13

A method of imparting stain resistance to polyamide fibers having free amino groups which comprises applying to said polyamide fibers an effective amount of an aqueous carbonated solution consisting essentially of (a) between about 0.0015 to 1.5% w. of a dye-resist agent consisting of a condensation product of formaldehyde and a member selected from the group consisting of a sulfonated phenol or a sulfonated naphthol; (b) 0 to 6.0% w. of a fluorochemical; and (c) 0 to 5% w. of a detergent suitable for cleaning polyamide fibers with the remainder being made up of an inert aqueous carrier; said aqueous composition being maintained at a pH of between about 2.5 and 7.0 by means of said carbonation whereby said dye-resist agent is caused to react with said free amino groups on said fibers rendering said amino groups unavailable for reaction with dyes.

Claim 29

A method of imparting stain resistance to carpeting consisting of polyamide fibers having free amino groups which comprises subjecting said polyamide fibers, subsequent to cleaning with a detergent solution, to a series of treatment steps using a carbonated rinse solution and a carbonated protectant solution comprising: (a) first applying to said polyamide fibers, as a spray, a carbonated aqueous rinse solution containing from 0.015 to 1.5% w. of a dye-resist agent consisting of a condensation product of formaldehyde and a member selected from the group consisting of a sulfonated phenol or a sulfonated naphthol at a pH of between about 3.5 and 6.5, allowing said dye-resist agent to react with the free amino groups on said fibers rendering said amino groups unavailable for reaction with dyes and mechanically removing at least a portion of said carbonated rinse solution and residual detergent from said fibers; and (b) next applying to said polyamide fibers, as a spray, an effective amount of a carbonated protectant solution consisting essentially of (a) 0.0015 to 1.5% w. of said dye-resist agent and (b) 0.0015 to 6.0% w. of a fluorochemical at a pH of between about 3.5 and 6.5, allowing the dye-resist agent to react with remaining free amino groups on said fibers rendering said amino groups unavailable for reaction with dyes and mechanically working said solution into said fibers.

Claim 30

A method of imparting stain resistance to carpeting consisting of polyamide fibers having free amino groups which comprises subjecting said polyamide fibers, subsequent to cleaning with a detergent solution, to a series of treatment steps using a carbonated rinse solution and a carbonated protectant solution comprising: (a) first applying to said polyamide fibers, as a spray, a carbonated aqueous rinse solution containing from 0.015 to 1.5% w. of a dye-resist agent consisting of a condensation product of formaldehyde and a member selected from the group consisting of a sulfonated phenol or a sulfonated naphthol at a pH of between about 3.5 and 6.5, allowing said dye-resist agent to react with the free amino groups on said fibers rendering said amino groups unavailable for reaction with dyes and mechanically removing at least a portion of said carbonated rinse solution and residual detergent from said fibers; and (b) next applying to said polyamide fibers, as a spray, an effective amount of a carbonated protectant solution consisting essentially of (a) 0.0015 to 1.5% w. of said dye-resist agent and (b) 0.0015 to 6.0% w. of a fluorochemical at a pH of between about 3.5 and 6.5, allowing the dye-resist agent to react with remaining free amino groups on said fibers rendering said amino groups unavailable for reaction with dyes and mechanically working said solution into said fibers.