US2409980A - Composition for discharge printing - Google Patents

Description

Patented Oct. 22, 1946 UNITED STATES PATENT OFFICE 2,409,980 coMrosrrron FOR nIscnARoE PRINTING Edgar C. Jensen, Rocheste assignors to ester,

No Drawing. Application Serial No. 500,

r, Herbert G. Scull, New York, and James G. McNally, Eastman Kodak N. Y., a corporation of Rochester, N. Y., Company, Roch- Ncw J erscy August 28, 1943, 410

9 Claims. (01. 8 64) witn cotton, viscose and cuprammonium rayon.

It is known in the art of textile printing that colored cellulose carboxylic ester fabrics will not fined white, without the addition of a swelling agent and a suitable catalyst. It is also well out, or halo, when subjected to a prolonged or pressure steaming, suitable to destroy or permanently decolorize the dyed ground. It is also well known that anthraquinone paste will speed up the action of the above reducing agents, Within a tion of the sulfoxylates in a anthraquinone paste.

salicylic acid or a salt of salicylic acid to accelerate the discharging action of the sulfoxylates. It is, accordingly, an object of our invention to provide a new method for discharge printing. A further object of our invention is to provide a new composition for discharge printing. Other objects will become apparent hereinafter.

In accordance with our invention, we effect the discharge of dischargeable colors on textile materials comprising cellulose carboxylic esters with aldehyde metal sulfoxylates, in the presence of salicylic acid or a salt of salicylic acid. The discharge is advantageously effected in the presence of a swelling agent, e, g. triethylene glycol, diacetylethanolamine, propylene glycol, diethylene glycol, sodium thiocyanate, calcium thiocyanate,

zinc thiocyanate, potassium thiocyanate or thiodiglycol. In practicing our invention, it is advantageous to prepare a paste containing salicylic acid or a salt of salicylic acid, the sulfoxylate, a swelling agent and a thickening agent. This paste composition is then printed upon the fabric with a dischargeable dye, and the printed fabric subjected to the action of steam whereupon discharging takes place.

The following examples will serve to illustrate the manner of practicing our invention.

Example 1 A 100% cellulose acetate satin material was dyed a light brown with 0.5% Eastone Blue BB, 0.5% Eastone Orange 2R, and 0.125% Eastone Red R in the customary single bath method of dyeing.

The above fabric after drying was printed with a paste made as follows:

Sodium formaldehyde sulfoxylate lbs 3 Water qts 1% Thiodiglycol qts Supertex T-125 (solubilized gum karaya textile gum; Jacques Wolf and Company) qts Salicylic acid oz 8 The above paste was applied by a roller printing machine; the fabric was dried, and aged for 3-6 minutes above 212 F. in the usual manner Example 2 A fabric constructed of 50% rayon and 50% viscose rayon shadeusing 2% of Eastone Blue weight of cellulose acetate and cellulose acetate was dyed a blue BB based on the 1.6% of Pont- Potassium sulfoxylate formaldehyde lbs 1 /2 Thiodiglycol oz Water qts 1% Supertex T- qts 2 A;

Salicylic acid oz 4 based on the v until foaming stopped. as octyl alcohol may be added.)

of, sodium formaldehyde sulfoxylate was added.

' processed printed by the Example 3 A blue-dyed fabric like that described in Example 2 was printed by the roller printing method using the following formula:

Per cent Algol Orange RFA Suprafix (0.1. No. 1217) 20 Vat paste 80 The vat paste was made up as follows: British gum lbs 2 7 Wheat starch lbs /2 Water qts 3 /2 boiled for hour, lbs. of sodium car- The above, ingredients were the heat turned off, and 1 j'bonate, /2 lb. of salicyclic acid, and 8 oz. of thic- Stirring was continued (Antifoam agents such Then 1 lbs.

,diglycol were added.

The fabric was printed, dried, aged 36 minutes above 212 F. in the usual manner for printing vat colors on viscose rayon or cotton fabrics. It was rinsed minute in cold water and oxidized for 10 minutes with soap at 140 F., then rinsed well and dried. A bright, well-defined orange print was obtained on the blue ground.

Example 4 A 100% acetate knit jersey material was dyed 'a tomato red shade with 1% Eastone Red R in the customary manner, dried, printed, and as in Example 1. A clear, well-defined white was obtained on the red ground.

Example 5 and-112% of Pontamine Fast Yellow 4GL (Pr. No.

53) and 0.2% Pontamine Fast Yellow RL based on the weight of the cotton. The customary sin- 'gle. bath method was employed in carrying out the dyeing operations. The dried fabric was block screen method using the following printing paste:

Normal zinc formaldehyde sulfoxylate oz 12 Sodium formaldehyde sulfoxylate oz 8 Thiodiglycol; oZ 8 Water qts 1 Supertex T-125 qts 2 salicyclic acid -4 oz 4 After printing, the fabric was dried, aged above 212 F. for 6 minutes, washed, and dried. A

'clear, sharp white discharge was obtained on the yellow material.

7 atoms.

salicyclic acid and prising a formaldehyde prising normal In the above examples, salicylic acid can be replaced by its salts, such as its ammonium salt, its sodium salt, its potassium salt or its calcium salt, for example. In Example 3, the sodium salt of salicylic acid is formed owing to the presence of the alkali. r

Our invention is directed especially to fabrics comprising such cellulose carboxylic esters as the hydrolyzed and unhydrolyzed cellulose acetates, cellulose propionates and cellulose butyrates, as well as the mixed cellulose esters, such as the hydrolyzed and unhydrolyzed cellu lose acetate-propionates and cellulose acetatebutyrates. All of these cellulose carboxylic esters consist of a cellulose portion or radical and an acid radical which contains from 2 to 4 carbon What we claim as our be secured by Letters Patent of the United States is:

1. A composition for discharge printing comprising a formaldehyde metal sulfoxylate and a substance selected from the group consisting of salicylic acid and its salts. I

2. A composition for discharge printing comprising formaldehyde sodium sulfoxylate and a substance selected from the group consisting of salicylic acid and its salts.

3. A composition for discharge printing comprising a swelling agent for cellulose carboxylic ester textile materials, 3, formaldehyde metal sulfoxylate and a substance selected from the group consisting of salicyclic acid and its salts.

4. A composition for discharge printing comprising 2. formaldehyde alkali metal sulfoxylate and salicyclic acid.

5. A composition for discharge printing comsalicylic acid.

'6. A composition for discharge printing comalkali metal sulfoxylate, normal zinc formaldehyde sulfoxylate and a substance selected from the group consisting of salicyclic acid and its salts.

7. A composition for discharge printing comprising formaldehyde sodium sulfoxylate, normal zinc formaldehyde sulfoxylate and a substance selected from the group consisting of salicylic acid and' its salts.

8. A process for discharge printing of textile materials comprising a cellulose carboxylic ester comprising printing the textile material colored with a dischargeable dye with a paste comprising a formaldehyde metal sulfoxylate and a substance selected from the group consisting of its salts, and steaming the printed fabric. p

91A composition for discharge printing comzinc formaldehyde sulfoxylate and a substance selected from the group consisting of salicyclic acid and its salts.

EDGAR C. JENSEN. HERBERTG. SCULL.

JAMES G. MCNALLY.

invention and desire to