DE2009468A1 - Continuous dyeing of polyester textiles - Google Patents

Abstract

Continuous dyeing of polyester textiles. Dyes: (where R is H, CH3, SO2C6H4CH3, C6H4Cl, COC5H11, C6H3Cl2, C6H4COC2H4COOCH3, C6H4COC2H4COOC2H5, COCH=CH2, C6H4(CH2)3CONHCH3 or COCH2CH2Cl; R1 is H or NH2; R2 is H, OC6H4CH3, OC6H4Br, COOCH2CH(CH3)2 CO(OC2H4)2OC4H9, COOCH2C(CH3)2CHOHCH(CH3)2, COOC8H17, CONH(CH2)3OCH2CH(C2H5)(C4H9), SC6H5, SC6H4Cl, SC6H4OCH3 or SC6H4SCH3; R3 is H, OC6H4OCH3 or OC6H4Br and R4 is H, NH2, COOC2H5, COC6H5 or S-C6H5) are used for continuously dyeing polyester textiles from solvents, pref. trichlorethylene. Orange, yellow, red, violet and blue shades are obtd. Operation reliability is high and speck formation by dye pptn. is prevented.

Description

Process for the continuous dyeing of textile material made of polyesters in solvents The invention relates to a process for the continuous dyeing of textile material made of polyesters in solvents, which is characterized in that dyes of the general formula are used used in which R- is a radical of the formula H, CH3, SO2C6H4CH3, C6H4Cl, COC5H11, C6H3Cl2, C6H4COC2H4COOCH3, C6H4COC2H4COOC2H5, COCH = CH2, C6H4 (CH2) 3CONHCH3 or COCH2 a radical, a radical of the formula R1 or H2Cl Formula H, OC6H4CH3, OC6H4Br, SC6H5, SC6H4C1, SC6H4OCH3 or SC6H4SCH3, R3 is a radical of the formula H, OC6H40CH3 or OC6H4Br and R4 is a radical of the formula H, NH2, Mean COC6H5 or S-C6H5.

Polyesters that can be dyed using the continuous process, are e.g. polyethylene glycol terephthalate ffier chemically analogous products. Suitable solvents for the new process are e.g. chlorinated hydrocarbons, like 1.1.1-trichloroethane, perchlorethylene or trichlorethylene.

The solvents can also be used as a mixture and with additions of solubilizers for the dyes such as methanol, ethanol, dimethylformamide or N-methylpyrrolidone, can be used, however, the use of pure solvents and in particular preferred by trichlorethylene.

The new dyeing process is expediently carried out so that the dye or a mixture of dyes is dissolved at room or elevated temperature and impregnating the textile material with the solution. Then the dye fixed by the usual methods, with intermediate drying also switched on can be.

The impregnation of the textile material m @ @ the dye solution can e.g. by a dipping process, by spraying or by padding. Most of the solvent is then expediently in the hot air stream removed from the goods and the dye in a known manner by steaming with water or Solvent vapor, preferably under pressure at 13,000, or by dry Heat treatment with hot air, contact heat, treatment with a high frequency field fixed or irradiation with infrared. A drying between the impregnation and the fixing stage can then be avoided if one with the goods after impregnation immediately enters a damper.

In contrast to the aqueous dye dispersions in the conventional Method of operation, solvent liquors represent real solutions of the relevant oil in the solvent. Naturally, there are no wetting agents, dispersants or softeners, so that the whole dyeing system is considerably simplified; will. The danger (lel formation of specks by Dye precipitation is excluded or is at least considerably restricted. This ensures a high level of operational reliability.

A considerable simplification can also be achieved with the finish of the dyes take place. It is not only possible to use the dyes in the form of dried presscakes to use, but you can also add all kinds of thickening agents to the dye, The following can be used as thickening agents: Salts of all kinds, inorganic polymers (e.g. Silica gel), carbohydrates such as sugar, starch, dextrin etc.

Or organic polymers, insofar as these substances are in the solvent are insoluble. The grain size of the dyes is not one, as is the case with dispersions critical size, so that the lengthy grinding processes can also be shortened considerably can.

The use of thickening agents which are soluble in the solvent, e.g. Polyvinyl esters, such as polyacrylic acid ethyl ester, are possible.

Such products can, for example, be rewashed with solvents, for example after heat setting, together with the unfixed dye be removed from the goods again.

To prepare the dye liquor, the dye can be stirred Dissolve in the solvent at room temperature or, if necessary, with warming. Man can also proceed in such a way that the liquor is in a heatable batch container Can circulate temperatures between 0 ° and 60 ° C through a filter. After adding of the dye, it settles on the filter and gradually becomes accordingly dissolved in its solubility.

The above-mentioned suspending agents, which are not soluble in the solvent, remain back on the filter. The fiott circulation can also be done via the padder chassis done so that one always works with a bare fleet.

To avoid dye migration during intermediate drying the liquor can also be thickeners which are soluble in the solvent, such as polyvinyl esters or cellulose ester.

Example 1 5.0 g of the dye of the formula are dissolved in 1000 ml of trichlorethylene with stirring. Fabric made of polyethylene glycol terephthalate is impregnated with the filtered clear dye solution at room temperature, the impregnated fabric is squeezed to about 200% of its dry weight and dried at 40 to 80 ° C. in a stream of air. The dye is then fixed by thermosoling (90 seconds at 21,000).

A red dyeing with good lightfastness and good sublimation fastness is obtained.

Example 2 5.0 g of the dye of the formula are dissolved in 1000 ml of trichlorethylene with stirring. 30 g of a 20% polyethyl acrylate thickener in trichlorethylene are added to the dye solution. Polyethylene glycol terephthalate fabric is impregnated with the dye solution clarified by filtration at room temperature, the impregnated fabric is squeezed to about 200% of its dry weight and dried at 40 to 80 ° C in the air stream. The dye is then fixed by thermosoling (2 minutes at 21,000). An orange dyeing with good lightfastness and good fastness to sublimation is obtained.

Similarly good dyeing results are obtained when impregnated and dried fabrics are not heat-set, but at 130 ° C. for 10 minutes cushions under pressure.

If, instead of the dye mentioned in Example 1, one of the dyes given in the table below is used, well-developed dyeings with good to very good lightfastness and sublimation fastness are also obtained.

Example R R1 R2 R3 R4 shade on polyester 0 CD rlQ) ov, c, -> k bD bO a, a> o <cl C a E: ri cd 9 ri I ri <do cd o (dm ri O ooko, k rc rt rt r (OO) rl O 3 HH SC6H4OCH3 H C0C6H5 red 4 SC6HCl H C0C6H5 scarlet 5 H g H O0 orange o HH SC6H4SCH3 HH yellow J X 3 = 0 UU 8 H NH2 OC6H4OCH3 OC6H4OCH3H = ox 9 NH2 C00C8H17 HH blue c) O U cm nn rq V rn M 1i \ U C) HC) V r4 o C) H purple 00 c OXPcl O 15 C6H4C3H6CONHCH3 HH = t H red t 3 x O xx UI \ 0 \ 0 WWO \ 0 0 W VC) UC) OU u OC) C \ l (U fU (U n g to OO t UN XD JC) x XD U 't) C) tx n Nx: t m C) W @ n st L oo ON t UE Example R R1 R2 R3 R4 Color shade on polyester 16 C6H4COC2H4COOC2H5 HHH COOC2H5 red 17 SO2C6H4CH3 H SC6H4OCH3 HH yellow 18 H NHCOC5H11 COOC4H9 HH blue 19 H NHCOCHCH2 COOC4H9 HClH blue 20 HOCHH17 COOC4H9 HClH4 HOCH5 COOCH4 HOCH5 COOCH4 HOCH4 HOCH4 blue 22 NHCH17 COOCHH17 COOCH4H4H4 HOCH2 22 NHCH17 NHC6H4Cl2 HH violet 23 C6H3Cl2 HHH NH2 orange

Claims (2)

Claims 1. A process for the continuous dyeing of textile material made from polyesters in solvents, characterized in that dyes of the general formula are used used, in which R is a radical of the formula H, CH3, SO2C6H4CH3, C6H4Cl, COC5H11, C6H3Cl2, C6H4COC2H4COOCH3, C6H4COC2H4COOC2H5, COCH = CH2, C6H4 (CH2) R2 is a radical R1CONHCH2, or COCH2 is a radical of the formula Formula ii, OC6H4CH3, OC6H4Br, COOCH2CH (CH3) 2, CO (OC2H4) 2OC4H9, COOCH2C (CH3) 2CHOHCH (CH3) 2, SC6H5, SC6H4Cl, SC6H4OCH3 or SC6H4SCH3, R3 is a radical of the formula H, OC6H4OCH3 or OC6H4 Br and R4 is a radical of the formula H, NH2, COOC2H5, COC6H5 or S-C6H5. 2. The method according to claim 1, characterized in that trichlorethylene used as a solvent.