Process for dyeing smooth-dry cellulosic fabric

Claim 2

A process for dyeing a smooth-dry cellulose fabric comprising: (a) padding a cellulose containing fabric with an aqueous finishing solution comprising sufficient concentrations of: N-methylol crosslinking agent, acid catalyst and choline quaternary compound to impart smooth-dry performance and dye receptivity properties to the fabric; (b) drying and curing the cellulose containing fabric for sufficient time and at sufficient temperature to interact the component of the finish with the fabric; and then, (c) dyeing the fabric with a cellulosic dye.

Claim 3

The process of claim 1 wherein the fabric is dyed with a cellulosic dye in a mildly acidic wool dye bath.

Claim 4

The process of claim 2 wherein the cellulose containing fabric is selected from the group of: cotton, wool-cotton blend, cotton-synthetic blend, rayon, rayon-cotton blend and rayon-wool blend.

Claim 5

The process of claim 2 wherein the N-methylol crosslinking agent is selected from the group consisting of: dimethylol dihydroxyethyleneurea, trimethylol acetylenediureine, tetramethylol acetylenediurenine, methylol melamine, methylol dicarbamate and dimethylol propylcarbamate.

Claim 6

The process of claim 2 wherein the acid catalyst is selected from the group consisting of: zinc nitrate hexahydrate, magnesium chloride hexahydrate, and mixed catalyst of magnesium chloride hexahydrate and citric acid.

Claim 7

The process of claim 2 wherein the aqueous finishing solution includes a nonionic wetting agent of sufficient concentration to achieve efficient wetting of the cellulosic fabric.

Claim 8

The process of claim 2 wherein the padding solution contains from about 1 to 12% N-methylol crosslinking agent, 0.15 to 4% acid catalyst, and 0.5 to 8% choline salt.

Claim 9

The process of claim 2 wherein the pH of the finishing solution ranges from about 2.4 to 6.

Claim 10

The process of claim 7 wherein the anion component of the choline salt is selected from the group consisting of: chloride, bromide, iodide, sulfate, hydroxide and citrate.

Claim 11

A process for selectively dyeing a print on cellulose containing fabric comprising: (a) padding a cellulose containing fabric with an aqueous finishing solution comprising sufficient concentrations of: N-methylol crosslinking agent and acid catalyst to impart smooth-dry performance to the fabric; (b) drying the cellulose containing fabric for sufficient time at sufficient temperature to remove moisture; (c) printing on the fabric with an aqueous solution comprising sufficient concentrations of choline quaternary compound to impart dye receptivity properties to the fabric; (d) curing the fabric for sufficient time at sufficient temperature to interact the components of the printing solution with the fabric; and then, (e) dyeing the fabric with a cellulose dye.

Claim 12

A process for selectively dyeing a print on cellulose containing fabric comprising: (a) padding a cellulose containing fabric with an aqueous finishing solution comprising sufficient concentrations of: N-methylol crosslinking agent and acid catalyst to impart smooth-dry performance to the fabric; (b) drying the cellulose containing fabric for sufficient time at sufficient temperature to remove moisture; (c) printing on the fabric with an aqueous solution comprising sufficient concentrations of choline quaternary compound to impart dye receptivity properties to the fabric; (d) curing the fabric for sufficient time at sufficient temperature to interact the components of the printing solution with the fabric; and then, (e) dyeing the fabric with a cellulose dye.

Claim 13

The process of claim 10 wherein the fabric is dyed with a cellulosic dye in a mildly acidic wool dye bath.

Claim 14

The process of claim 11 wherein the aqueous printing solution comprises choline chloride and a thickening agent to improve print sharpness.

Claim 15

The process of claim 12 wherein the thickening agent is hydroxyethyl cellulose.

Claim 16

A process for selectively dyeing a print on cellulosic containing fabric comprising: (a) printing on a cellulose containing fabric with an aqueous printing solution comprising sufficient concentrations of: N-methylol crosslinking agent, acid catalyst and a choline quaternary compound to impart dye receptivity properties to the printed area of the fabric; (b) drying and curing the cellulose containing fabric for sufficient time and at sufficient temperature to interact the print solution with the fabric; and then, (c) dyeing the fabric with a cellulosic dye in a mildly acidic wool dye bath to achieve selective dyeing on the printed areas.

Claim 17

A process for selectively dyeing a print on cellulosic containing fabric comprising: (a) printing on a cellulose containing fabric with an aqueous printing solution comprising sufficient concentrations of: N-methylol crosslinking agent, acid catalyst and a choline quaternary compound to impart dye receptivity properties to the printed area of the fabric; (b) drying and curing the cellulose containing fabric for sufficient time and at sufficient temperature to interact the print solution with the fabric; and then, (c) dyeing the fabric with a cellulosic dye in a mildly acidic wool dye bath to achieve selective dyeing on the printed areas.

Claim 18

The process of claim 14 wherein the aqueous printing solution additionally contains a thickening agent to improve print sharpness.

Claim 19

The process of claim 15 wherein the thickening agent is hydroxyethyl cellulose.

Claim 20

A process for differentially dyeing a cellulose smooth-dry fabric comprising: (a) padding a cellulosic yarn with an aqueous finishing solution comprising sufficient concentrations of: N-methylol crosslinking agent, acid catalyst and a choline quaternary compound to impart smooth-dry performance and dye receptivity to the yarn; (b) drying the cellulosic yarn for sufficient time at sufficient temperature to remove moisture; (c) padding another cellulosic yarn with an aqueous finishing solution comprising sufficient concentrations of: N-methylol crosslinking agent and acid catalyst to impart smooth-dry and dye resist properties to the yarn; (d) drying the treated yarn of (c) for sufficient time at sufficient temperature to remove moisture; (e) combining yarn (b) with yarn (d) so as to produce a fabric with preselected dye resist and dye receptive areas; (f) curing the fabric at sufficient temperature for sufficient time to interact the finishing components with the fabric; and then, (g) dyeing the fabric with a cellulosic dye in a mildly acidic wool dye bath, thereby producing a differentially dyed, smooth-dry cellulosic fabric.

Claim 21

A process for differentially dyeing a cellulose smooth-dry fabric comprising: (a) padding a cellulosic yarn with an aqueous finishing solution comprising sufficient concentrations of: N-methylol crosslinking agent, acid catalyst and a choline quaternary compound to impart smooth-dry performance and dye receptivity to the yarn; (b) drying the cellulosic yarn for sufficient time at sufficient temperature to remove moisture; (c) padding another cellulosic yarn with an aqueous finishing solution comprising sufficient concentrations of: N-methylol crosslinking agent and acid catalyst to impart smooth-dry and dye resist properties to the yarn; (d) drying the treated yarn of (c) for sufficient time at sufficient temperature to remove moisture; (e) combining yarn (b) with yarn (d) so as to produce a fabric with preselected dye resist and dye receptive areas; (f) curing the fabric at sufficient temperature for sufficient time to interact the finishing components with the fabric; and then, (g) dyeing the fabric with a cellulosic dye in a mildly acidic wool dye bath, thereby producing a differentially dyed, smooth-dry cellulosic fabric.

Claim 22

The process of claim 17 wherein the choline quaternary is choline chloride.