Method for improving the bleach resistance of dyed textile fiber and product made thereby

Claim 3

The method of claim 1 wherein said solution contains a solvent selected from the group consisting of water and C 1 -C 8 alcohols.

Claim 4

The method of claim 2 wherein said solution is applied to said textile fiber to achieve 1 to 10 wt. % monomer solids based upon the weight of said textile fiber.

Claim 5

The method of claim 3 wherein said textile fiber is dyed with an acid dye or disperse dye.

Claim 6

The method of claim 4 wherein said solution is aqueous.

Claim 7

The method of claim 5 wherein said textile fiber is selected from the group consisting of nylon 6,6 and nylon 6 fiber and said fiber is in the form of carpet.

Claim 8

The method of claim 5 wherein said drying is at a temperature of from 100° to 200° C.

Claim 11

The method of claim 8 wherein said monomers do not contain amide linkages.

Claim 12

The method of claim 9 wherein said textile fiber is selected from the group consisting of nylon 6,6 and nylon 6 fiber and said fiber is in the form of a carpet.

Claim 13

The method of claim 8 wherein said monomers are selected from the group consisting of: (a) mixtures of dicarboxylic acids selected from the group consisting of carbonic acid, oxalic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, dodecanedioic acid, isophthalic acid and terephthalic acid; and diamines selected from the group consisting of ethylenediamine, hexamethylenediamine, 1,8-octanediamine decamethylene diamine, piperazine and diamine oligomers which are the condensation product of two moles of a diamine and one mole of a diacid ester or diacid chloride formed from said dicarboxylic acids; (b) amino acids selected from the group consisting of 6-aminohexanoic acid, aminoundecanoic acid, aminododecanoic acid, glycine, cystine, asparagine, glutamine, lysine, arginine, tyrosine, and 2-pyrrolidinecarboxylic acid; and (c) lactams of 6-aminohexanoic acid, aminoundecanoic acid, aminododecanoic acid or lysine.

Claim 14

The method of claim 8 wherein said monomers are (a) a mixture of diamine oligomers and dicarboxylic acids, wherein said diamine oligomers are the condensation products of two moles of a diamine and one mole of a diacid ester or diacid chloride and have two amide linkages.

Claim 15

The method of claim 12 wherein said textile fiber is selected from the group consisting of nylon 6,6 and nylon 6 fiber, said fiber having been dyed with an acid dye and said fiber is in the form of carpet.

Claim 16

The method of claim 13 wherein said diamine oligomers are the condensation of products of two moles of hexamethylene diamine with one mole of a methyl ester of a diacid selected from the group consisting of adipic acid, glutaric acid and succinic acid.

Claim 17

The method of claim 12 wherein said drying is at a temperature of from 120° to 160° C.

Claim 18

The method of claim 8 wherein said monomers are selected from the group consisting of (a) a mixture of hexamethylenediamine and adipic acid, (b)aminohexanoic acid, and (c) ε-caprolactam.

Claim 19

The method of claim 8 wherein said solution further comprises salicyclic acid, and said solution is applied to said textile fiber to achieve from 0.1 to 7 wt. % of salicyclic acid based on the weight of said textile fiber.

Claim 20

A bleach resistant carpet produced by the process steps of applying an aqueous solution of monomers to a dyed, polyamide textile fiber to achieve 1 to 10 wt. % monomer solids based upon the weight of said textile fiber, wherein said monomers are selected from the group consisting of: (a) a mixture of diamines and diacids; (b) amino acids; and (c) lactams, and the molecular weight of each of said monomers is less than 1,000, and drying said textile fiber at a temperature of 20° C. to 200° C. to form a non-volatile, polymeric salt film on said textile fiber without forming a polyamide from said monomers.

Claim 21

A bleach resistant carpet produced by the process steps of applying an aqueous solution of monomers to a dyed, polyamide textile fiber to achieve 1 to 10 wt. % monomer solids based upon the weight of said textile fiber, wherein said monomers are selected from the group consisting of: (a) a mixture of diamines and diacids; (b) amino acids; and (c) lactams, and the molecular weight of each of said monomers is less than 1,000, and drying said textile fiber at a temperature of 20° C. to 200° C. to form a non-volatile, polymeric salt film on said textile fiber without forming a polyamide from said monomers.

Claim 22

The carpet of claim 18 wherein each of said monomers has a molecular weight of less than 750, said drying is at a temperature of from 120° to 160° C., and said solution is applied to said textile fiber to achieve 2 to 7 wt. % monomer solids based on the weight of said textile fiber.

Claim 23

The carpet of claim 19 wherein said monomers do not contain amide linkages.