US1684401A - Textile dye - Google Patents

Description

Patented Sept. 18, 1 928.

PATENT oFrlce. I;

WINTHROP S. LAWRENCE, OF NEW YORK, N. Y.

N Drawing.

My invention relates to products suitable for the. application of dyestuffs to fabrics and refers particularly to dyestuffs in a form suitable for use as dyes and prints in the 6 coloring of fabrics and fibers.

The ordinary printing pastes and textile dyes used in the printing and dyeing of textile fabrics are not suitable for popular use, as they require expert application and involve steps of processnot readily obtainable by the public.

There is a demand, however, for printing pastes and textile dyes which can be applied in the-form of dyes and which can be fixed to the fiber without the necessity of extraordinary steps of process.

Among the properties essential in a practically applicable textile dye, the following may be mentioned It must be of such consistency as to flow readily from the brush; it must not spread on the fabric; must be fast to rubbing; it must be free from substances which will affect the fabric and render it Weak or harsh; it must dry rapidly; should be odorless; must be nonpoisonous; must penetrate the fabric and must produce results fast to washing and rubbing without steaming or similar operations. w

T have found that all of the above-mentioned, and other, valuable attributes may be obtained in a textile dye'by employing glycolic compounds as a solvent for the zinctannates of the basic dyestuffs.

By"glycolic compounds, I mean ethylene glycol, its homologues, derivatives and sub stitution products, among which I have found chlor-hydrin especially valuable for my product. I

I have found that the basic-dye-zinc-tanmates are soluble in glycolic compounds and that this solution can be incorporated with other chemicals to produce a textile print of most valuable properties.

45 If aqueous solutions of lakes such as are here mentioned with a solid solvent agent. such as resorcin, which has been widely used.

in the textile dyeing industry for this pur ose were used b ersons inex erienced there would be a danger in the first washing, or by accidental wetting of the dye, of the solid solvent agent going into solution and since this solventcomponent is Inuchmore rapidly soluble in water than the thickening Application filed March 80, 1927. Serial No. 180,261.

agent, the ake would go back into solution and run lIltO llhe' surrounding fibers causing a very undesirable smear or would be liable to stem other articles with which it was in contact.

The glycolic c nhpounds that I prefer to use are l1qu1ds, and hence, do not leave any solid res duum upon drying of the dye whiclz, by accldental wetting, or in the first washing, would have a tendency to redissolve the colormg matter and cause running and smearing. The glycolic compounds chosen have boiling points Within the range of temperatures to allow of easy dryingwithout the necessity of high temperatures.

Further, the rate of evaporation of the glycolic compounds is so slow as to allow the mixture to penetrate the fabric, or fiber, before it dries.

As an example of one method of producing a dye of my invention, ll give the following formula, the parts indicated being by weight 2 parts basic dye 6 parts tannic acid 3 parts zinc chloride 6 parts glacial acetic acid' 40 parts ethylene glycol 40 parts ethylene chlorhydrin aqueous solution (40%) 70 parts gum tragacanth aqueous solution 167 parts The dye thus formed may be applied to a fabric by means of a brush, or other suitable means, and is allowed to dry in the air or at a medium artificial temperature. The goods may be then washed, if desired.

In the above example, I have employed both ethylene glycol and ethylene chlorhyf an drin, but either of these may be used alone or with small amounts of a solid solvent, such as resorcm, or phenol, which in small quantities would not be liable to produce running or smearing in'the hands of an inexperienced person and would be valuable as agents whichwould prevent bacterial or enzyme action on the gum in warm weather, in which event, however; 80 parts of ethylene glycol, or 50 parts of ethylene chlorhydrin may be. employed.

By changing the viscosity of the solution,

l J a v ,2 1*

it may be used for block printing or viith print rolls and by textile dye, i mean a mixture w ich may be used in theordmarK printing processes, or as a paint by brus 6 application.

By glyeolic compound in my clalms, I mean either a single glycolic compound or a plurality of such com ounds.

I do not limit myse f to the particular ma- 0 terials, times, temperatures, uantities, or

"steps, of procedure, as specifiea y described, I

zinc-tannate lake, a thickening agent an a glycolic compound.

2. A textile dye containing a basic-dyezinc-tannate lake, a thickening agent and Mchlorhydrin.

wm'rlmor s LAWRENCE.