US1554461A - Ctjrt philipp and richard felbelmabttir - Google Patents

Description

pressure which is of Patented Sept. 22, 1925.

UNITED STATES PATENT OFFICE.

cunr rnrmrr AND RICHARD FEIBELKANN, or

or enosssnnam, GERMANY, Assrenons- '10 cmnuscnu rnnnrx nanunnun, AND uonun'r von murmur,

OF RADEBEUL-DRESDEN, GER HAIRY, A CORPORATION OF GER-Km.

PROCESS FOR BLEACHING VEGETABLE, ANIMAL, AND ARTIFICIAL 2131338..

Ho' Drawing RICHARD FnmnLu'ANN, both citizens of the Republic of Germany. residing at. Radebeul, Saxony, and ROBERT Hana-2n, a citizen of the Republic of Switzerland, residing at Grosscnhain, Saxony, Germany, have invented certain new and useful Improvements in Processes for Bleaching Vegetable, Animal, and Artificial Fibers, of which the following is a specification.

This invention relates to bleaching processes and it particularly relates to processes in which a number of materials of greatly varying character, for instance vegetable fibers such as cotton, flax. straw, hemp, ramie, jute, sisal and the like fibers in their raw state or in the form of intermediate or finished goods made from them, dyed or printed textile goods are treated with the salts of the aromatic sulfochloramides. preferably in the form of their aqueous solution. Also animal fibers, such as wool in the raw state or in the form of intermediate or finished goods made from it, furs, feathers, leather, horn, ivory and the like, as well as artificial fibers, like artificial silk and the many artificial substitutes for ivory,'if reduced to'thin threads, or thin sheets, may be bleached by means of the salts of the arcmatic sulfochloramides. We have found that the aforesaid salts maybe applied with excellent results as a bleaching agent, the efliect of these agents being mild which allows several very im ortant v advantages. For instance cotton an linen fibers are not affected by our process. if treatedatahi h temperature;'even the fiber of artificial sil known to be very sensitive to moisture and chemical agents, is not reduced in strength; it may even be applied for bleaching under great importance in the bowking and debasting as our invention makes it possible'to have the bowking and debasting process accompanied by a bleaching process. The bleaching fochloramides 18 based on the gradual neration of oxygen according to the fol owing equation: .v

' Ma r I. p nsoad-mo;uso,nn,+moi+o effect of the salts of the sul-.

Application file'd January 8, 1925. Serial No. 422.

for instance such as sodium, and R repre in which represents a mono-valent metal,

sents an aromatic nucleus,such as benzene,

toluene and the like.

It is a special merit of our process that metal oxides, which in other bleaching processes are often dangerous to the fiber on account of the catalytic action caused by the same, are without any action whatever in our new process.

For the better understanding of our invention we are going to describe by way of example, how We proceed to carry the same into efl'ect.

E trample 1.Bleaching of washing.

100 kilo soiled washing is acted upon for half an hour in a bath,'with 3050 g. of the sodium-salt of ptoluenesulfochloramide at a temperature of ence of soap and sodium-carbonate 1n the bath accelerating the cleaning process. The aforesaid p-toluene-sulfochloramide-sodium dissolves the dirt, but it acts especially as a bleaching agent in such manner that the lawn-bleach may be entirely dispensed with. Old Washing with a yellow tinge turns white again.

- Our invention shortens the washin process whereby the material of the was ingis not exposed to the mechanical treatment for such a long time as heretofore.

After the washin has been boiled, it is rinsed and dried. 1%xe washing thus treated is distinguished b a fresh pleasant scent.

Example 2.-B eachin textile fabrics.

The raw goods, printe white ground, are worked in a. bath of slightly'acid reaction, containing 1nr 1000 liters of water 1 K0. of p-toluene-sulfochlo- .ramide-sodium. The printed color gets richer and the white ground shows up brighter so as to considerably enhance th ap earance of the goods. a

t is possible to comb ne cess with $1? ofapplyrng the mor The goods dyed with indigo are simultaneously with an organic am and a catalyzer, for which purpose com pp T rn, oo e tymqkel, van

dent.

und of 'um and with indigo on a' 50 100 0., the presthe bleaching pm I of other metals were found suitable.- For instance we reduce 100 g. of a neutralthlckening agent such as starch, 50 g. lactic acld and 10 g. copper sulfide (OuS) to a paste and use the same as printing dye. W1th this paste the dyed goods are printed. After rying the material is passed through a hot mordanting bat-h contalnin 10% 'p-toluenesulfochloramide sodium. 'The mordanting takes place very quickly.

Emample 4.

The fabric, dyed with Columbia-black, a direct cotton dye, is treated with a' rint ng paste containingfor each 100 g. thickening agent 50 gr. tartaricv acid and 10 gr. ironchloride. The mordanting is'carried out as in example 3. c

' Escample 5.Bleaching of artificial silk.

The raw artificial silk, which in the same factory is not always obtained, batch for batch, in the same shade, is given an equalizing bleach by passing the threads at any convenient temperature through a bath of approximately 0.1-O.5% p-toluene-sulfochloramide-sodium, the amount of the same beinggoverned by the desired bleaching. The strength of the thread is not reduced.

Also the bleaching of straw, flax, cellulose, leather and other vegetable and animal materials can be accomplished in a similar manner. In some cases, as'for instance of leather, it is advantageous to add some acid to the bleaching liquid. 0

Emample 6'.Bleaching of cotton under pressure. (bowking process).

Yegetable fiber-or fabric is 'heated'in a boller with an alkaline liquid of .for in- I stance 2.5 B. containing for each liter of the bath 1 g. p-toluene-sulfochloramide-sodium. This so-called bowking process causes a considerable preliminary bleaching efl'ect withoutthe formation of oxycellulose and allows a reduction of the time of the bowking process.

Emample 7'.

egumming and bleaching is done simultaneously bysaturatingthe goods in a hot bath containing approximately 0.10.5% ptoluenesulfochloramide-sodium and allowing them to stand in Wooden tanks, the latter kind of tanks being preferable so as to preserve a temperature of about 7080 C. for one hour.

Example 8.Cleaning and bleaching of raw wool.

Raw wool is washed with an aqueous solugrade of 'mal and artificial fibers,

tion of 0.5 percent of sodium carbonate and of 0.5 percent of ptoluenesulfochloram1de a temperature of 40-50" C. It is then taken from the bath, washed with water and dried. In this manner the wool is well cleaned from fatty products and at the same time bleached.

What We claim is:

l. The process of treating vegetable, animal and artificial fibers, said process comprising acting on the fibers with the salt of an aromatic sulfohalogenamide.

2. The process of treating vegetable, animal and artificial fibers, said process comprising acting on the fibers with the aqueous solution of a salt of an aromatic sulfohalogenamide.

3. The process of treating vegetable, animal and artificial fibers, said process comprising acting on the fibers at an elevated temperature with a solution of a salt of an aromatic sulfohalogenamide.

The process of treating vegetable, animal and artificial fibers, said process comprising acting on the fibers at an elevated temperature with a solution of a salt of an aromatic sulfohalogenamide under pressure.

5. The process of treating fibers, comprising the step of acting on the fibers with a solution of a salt of an aromatic sulfohalogenamide in the presence of an acid.

The process of treating vegetable, anisaid process comprising acting on the fibers with the solution of the sodium salt of p-toluenesulfochloramide.

7. The process of treating vegetable, animal and artificial fibers, said process comprising acting on the fibers at an elevated temperature with the solution of the sodium salt of p-toluenesulf0chloramide.

e process of treating vegetable, animal and artificial fibers, said process comprising acting on the fibers at an elevated temperature with the solution of the sodium salt of, p-toluenesulfochlorainide under pressure.

9. The process of prisin the step of acting on the fibers with sulfochloramide in the In testimony whereof we alfix our signatures.

CURT PHILIPP. f RICHARD FEIBELMANNQ ROBERT HALLER.

treat-ing fibers, comthe so ution of the sodium salt of p -toluenepresence of an acid.