DE2500430A1 - Aqueous processing agent for cellulosic textile materials - for non-crease, wash and wear finishes, without discolouration - Google Patents

Abstract

The aq. textile processing agent of Parent Patent contg. 1,3-dimethylol-4,5-dihydroxy-2-imidazolidinone, Zn nitrate as catalyst, and sequestering additives, for imparting a non-crease, non-iron finish to undyed textile materials contg. cellulose, without yellowing or singeing when hot pressed, is improved by replacing the Zn nitrate. The zinc salt is replaced as the catalyst by a Mg or Al salt, e.g. MgCl2 and/or AlCl3. The sequestering agent can be added from an aq. soln., simultaneously, before or after the imidazolidinone and the catalyst. Replacement of the Zn (which is toxic for sewage treatment bacteria) avoids need for purification of the effluent.

Description

Aqueous textile finishing agent, process for finishing textiles and the resulting products.

Addition to the main patent ....... (Patent application P 15 94 899.9) The invention relates to a textile finishing agent, with which undyed cellulose textile materials can be finished without discoloration, crease-proof and without stiffening, a method for finishing textiles and the cellulosic materials obtained in this way. It relates in particular to a process which consists in that an aqueous agent, the 1,3-dimethylol-4,5-dihydroxy-2-imidazolidinone of the formula I. contains a magnesium salt or an aluminum salt as a catalyst and a sequestering agent, is applied to cellulosic materials.

The invention provides a further aspect or improvement of the invention, which is the subject of the main patent application No. P 15 94 899.9.

The main patent application relates to an aqueous textile finishing agent, the 1,3-dimethylol-4, 5-dihydroxy-2-imidazolidinone, zinc nitrate and a sequestering agent contains.

Usually zinc nitrate is used in combination with sodium acetate for the curing of 1,3-dimethylol-4,5-dihydroxy-2-imidazolidinone is used. Other zinc salts, such as zinc chloride and zinc sulfate, do not lead to the desired "wash-and-wear" properties.

Other curing catalysts, such as magnesium chloride, are not used, since they (1) cause yellowing when hardened, (2) scorch when hot-pressed and (3) cause yellowing when scorched after chlorination. There is therefore a need for a curing catalyst for 1,3-dimethylol-4, 5-dihydroxy-2-imidazolidinone, the ecological one for textile finishing companies suitable is. Since the zinc ion is toxic to bacteria, it is necessary for wastewater treatment many manufacturing companies would prefer to use it abandon zinc salts as these salts require wastewater treatment processes do. There is therefore a need for a method by which textiles are crease-resistant or can be finished permanently iron-free, according to which a textile finishing agent, the 1,3-dimethylol-4, 5-dihydroxy 2-imidazolidinone and one no Contains catalyst comprising zinc salt, applied and exposed to heat is cured, and that compatible with the other requirements and in particular is suitable for white cellulose materials and that (1) yellowing during hardening and (2) prevents or reduces scorching during hot pressing.

It has now been shown that the used according to the main patent Zinc nitrate by a magnesium salt or an aluminum salt such as magnesium chloride, Aluminum chloride or magnesium nitrate, as such or in the form of mixtures used, can be replaced, thereby achieving the desired results and there is no need to use wastewater treatment processes. According to the invention an aqueous solution containing 1, 3-dimethylol-4, 5-dihydroxy-2-imidazolidinone, a sequestering agent and a catalyst consisting of an aluminum salt or a magnesium salt, applied to the textile material, which is then dried and is cured at an elevated temperature.

The invention therefore relates to an aqueous textile finishing agent according to the main patent application P 15 94 899.9 based on 1,3-dimethylol-4,5-dihydroxy-2-imidazolidinone, a sequestering agent and a catalyst, characterized in that is that there is a magnesium or aluminum salt, such as magnesium chloride, Aluminum chloride, magnesium nitrate or mixtures thereof.

The sequestering agent can be used simultaneously with, before or after Application of the 1,3-dimethylol-4, 5-dihydroxy-2-imidazolidinone to be applied 1 preferably the imidazolidinone and the sequestering agent from the same aqueous solution applies. The sequestering agent can, however, from a aqueous solution before or after applying the imidazolidinone and the catalyst be applied.

The textile finishing agent according to the invention contains many fluorescent brighteners compatible, which are normally applied to cellulosic materials, and in particular with brighteners of the stilbene class. Undyed cellulose fabrics according to the invention treated have good resistance to scorching and discoloration, when the fabrics are ironed or ironed and hardened at elevated temperatures.

The non-ionic surfactant given in the following examples Medium is the condensation product of nonylphenol with an average of 9.5 mol Ethylene oxide. Other suitable nonionic surfactants can also be used can be used, such as other alkylaryl polyethylene glycol ethers and ethylene oxide adducts of straight-chain alcohols.

The expression "after chlorination" used in the following examples stands for the yellowing of the test fabric after a chlorination and scorching treatment, which is a modification of AATCC Test Method 92-1967. It becomes this latter Method used with the difference that test specimens are used, the dimensions 4 x 6 inches (10.2 x 15.2 cm) have the samples not in a prewetting bath and that they are placed in the chlorination bath at 26.70C (800F) for 15 minutes be stirred. After this time has elapsed, the fabric samples are removed and separated six times for one minute each time at 26.7 ° C (80 ° F) using 50 parts of rinse water rinsed per part by weight of the dry sample. The samples are then allowed to drain and dry them with the help of a flat press. The chlorinated samples are then for at least 4 hours at 21.1 + 1.1 ° C (70 + 20F) in a constant atmosphere conditioned with a relative humidity of 65 + 2% and then for 30, 60 and 90 seconds with the aid of an AATCC scorching device (AATCC Scorch Tester) scorched at 1850c or 2040C (3650F or 400dz). This will be non-chlorinated Samples used as control samples.

The permanent non-iron finish is made using the AATCC test method 124-169 examined while crease recovery using the Monsanto AATCC method 66-1972 is checked.

The following examples serve to further illustrate the invention The parts and percentages given are based on weight. Example 1 Man prepares four aqueous pad baths, each containing 10.0% by weight of 1,3-dimethylol-4,5-dihydroxy-2-imidazolidinone, 1.5% by weight magnesium chloride, 0.10% by weight of a non-ionic surfactant Agent and sodium acetate and citric acid in those indicated in Table I below Quantities included. The pH of the pad baths is adjusted as needed with the help of sodium hydroxide or hydrochloric acid adjusted to the specified value.

Table I. Koltzbad pH value additives Citric acid sodium acetate % By weight mole% by weight mole A 4.7 0.000 0.000 0.000 0.000 B 4.5 0.625 0.003 0.000 0.000 CC 5.3 OC) OO 0, OOq, 0.250. 0.003 DD 5.7 0.000 0.000 0.775 0.009 The pad baths are applied to a polyester / cotton fabric (65/35) by conventional padding, whereby a moisture absorption of is achieved. The tissues containing 1,3-dimethylol-4,5-dihydroxy-2-imidazolidinone are dried for 6 minutes at 1070C (2250F) and then heated for 1.5 minutes in an oven at 1770C (3500F).

The treated fabrics are non-iron for their non-iron appearance after one and after five washes and examined for yellowing, by changing the color of the chlorinated fabric before and after scorching during 30.60 and 90 seconds at 2040C (4000F) in the AATCC incinerator.

The fabrics are visually assessed and the data given correspond the scale given below. With this evaluation standard, a corresponds to Difference of 0.25 units a noticeable difference.

Value Rating 5.0 no yellowing 4.0 slight yellowing 3.0 noticeable Yellowing 2.0 significant yellowing 1.0 severe yellowing The in the following Tables A to D indicated in Table IS correspond to the pad baths A to D, which are based on Polyester / cotton shirt fabric has been applied.

Table II Fabric Non-iron appearance Yellows when seared at 204 ° C After one After five Initially after chlorination Washing process washing processes 30 sec 60 sec 90 sec 30 sec 60 sec 90 sec A 3.40 3.60 4.50 4.25 4.00 4.00 3.75 3.50 B 3.30 3.50 4.75 4.50 4.25 4.50 4.25 4.00 C 3.40 3.25 4.75 4.50 4.25 4.25 4.00 3.75 D 3.25 3.90 4.75 4.50 4.25 4.25 4.00 3.75 unconcerned 2.10 2.25 5.00 4.75 4.50 4.75 4.50 4.25 acts The above padding baths are also applied to cotton garments using conventional padding methods with a moisture absorption of 73% by weight. The fabrics, which contain 7.3% by weight, based on the fabric, 1,3-dimethylol-4,5-dihydroxy-2-imidazolidinone, are dried for 6 minutes at 1070C (2250F) and for 1.5 minutes at 177 ° C (35o0F) hardened. The results obtained on cotton garments are given in Table III below, fabrics A to D corresponding to pad baths A to D. Table III Fabric crease recovery (W + F) Yellowing when scorched at 185 ° C Initially (degrees) Initially After chlorination 30 sec 60 sec 90 sec 30 sec 60 sec 90 sec A 307 5.00 4.75 4.50 3.00 2.75 2.50 B 313 5.00 4.75 4.50 4.50 4.25 3.75 C 311 4.75 4.50 4.25 2.75 2.50 2.25 D 306 5.00 4.75 4.50 2.50 2.25 2.00 untreated 216 4.75 4.50 4.25 4.75 4.50 4.25 Example 2 Four aqueous pad baths are prepared, each containing 10.0% by weight of 1,3-dimethylol-4,5-dihydroxide-2-imidazolidinone, 1.375% by weight of magnesium chloride, 0.125% by weight of aluminum chloride, 0.10% by weight % By weight of a nonionic surfactant and sodium acetate or citric acid in the amounts shown in Table IV below. The pH values of the pad baths are adjusted to the specified values by adding sodium hydroxide or hydrochloric acid as required.

Table IV Log bath | pH value | Additives Citric acid sodium acetate % By weight mole% by weight mole A 3.3 0.000 0.000 0t000 0.000 B 3.9 0.625 0.003 0.000 0.000 C 4.0 0.000 0.000 0.250 0.003 D 4.4 0.000 0.000 0.775 0.009 In all cases, the pad baths are applied to polyester / cotton fabric (65/35) and cotton garment fabric under the same conditions as in Example 1 investigated the methods given in Example 1.

The results obtained on polyester / cotton shirt fabric are compiled in Table V below, fabrics A to D corresponding to pad baths A to D. Table V Fabric Long-lasting, non-iron appearance. Yellowing when scorched at 204 ° C After one wash After five washes Initially After chlorination process processes 30 sec 60 sec 90 sec 30 sec 60 sec 90 sec A 3.20 3.20 3.25 3.00 2.75 4.00 3.75 3.50 B 3.30 3.50 4.50 4.25 4.00 4.50 4.25 4.00 C 3.50 3.50 4.50 4.25 4.00 4.25 4.00 3.75 D 3.20 3.80 4.75 4.50 4.25 4.25 4.00 3.75 unconcerned 2.1 2.25 acts The results obtained on cotton garments are listed in Table VI below, fabrics A to D corresponding to pad baths A to D.

Table VI Fabric crease recovery (W + F) Yellowing when scorched at 185 ° C Initially (degrees) Initially After chlorination 30 sec 60 sec 90 sec 30 sec 60 sec 90 sec A 313 4.75 4.50 4.25 4.25 4.00 3.75 B 311 5.00 4.75 4.50 4.50 4.25 4.00 C 310 5.00 4.75 4.50 4.00 3.50 3.25 D 307 5.00 4.75 4.50 3.25 3.00 2.75 untreated 216 4.75 4.50 4.25 4.75 4.50 4.25 Example 3 Four aqueous pad baths are prepared, each containing 10.0% by weight of 1,3-dimethylol-4,5-dihydroxy-2-imidazolidinone, 1.25% by weight of magnesium nitrate, and 0.10% by weight of one nonionic surfactant and sodium acetate or citric acid in the amounts given in Table VII below.

The pH of the pad baths is adjusted as needed with the help of sodium hydroxide or hydrochloric acid adjusted to the specified value.

Table VII Pad bath pH value additives Citric acid sodium acetate % By weight mole% by weight mole A 4.6 0.000 0.000 0.000 0.000 B 4.8 0.625 0.003 0.000 0.000 C 5.5 0.000 0.000 0.250 0.003 D 6.1 0.000 0.000 0.775 0.009 In all cases, the pad baths are applied to polyester / cotton fabric (65/35) and cotton garment fabric, the conditions given in Example 1 being observed. The fabrics are examined for their permanent freedom from ironing, their yellowing and their crease recovery using the methods given in Example 1. The results achieved on polyester / cotton shirt fabric are given in Table VIII below, in which fabrics A to D correspond to pad baths A to D correspond.

Table VIII Fabric Long-lasting, non-iron appearance. Yellowing when scorched at 204 ° C After one wash, After five washes, initially After chlorination process gears 30 sec 60 sec 90 sec 30 sec 60 sec 90 sec A 3.40 3.30 4.25 4.00 3.75 4.25 4.00 3.75 B 3.50 3.40 4.50 4.25 4.00 4.25 4.00 3.75 C 3.20 3.50 4.25 4.00 3.75 4.00 3.75 3.50 D 3.20 3.40 4.00 3.75 3.50 1.00 1.00 1.00 unconcerned 2.25 2.00 4.75 4.50 4.25 4.50 4.25 4.00 acts The results obtained on cotton garments are given in Table IX below, fabrics A to D corresponding to pad baths A to D.

Table IX Fabric crease recovery (W + F) Yellowing when scorched at 185 ° C Initially (degrees) Initially After chlorination 30 sec 60 sec 90 sec 30 sec 60 sec 90 sec A 300 4.75 4.50 4.25 1.00 1.00 1.00 B 298 5.00 4.75 4.50 4.25 4.00 3.75 C 293 5.00 4.75 4.50 0.75 0.75 0.75 D 278 4.75 4.50 4.25 0.50 0.50 0.50 unacceptable 176 5.00 4.75 4.50 5.00 4.75 4.50 acts The above results illustrate the effectiveness of the added citric acid as a means of reducing the discoloration of polyester / cotton fabrics and cotton garment fabrics when treated with 1,3-dimethylol-4,5-dihydroxy-2-imidazolidinone and magnesium salts or mixtures of magnesium - and aluminum salts are treated.

Claims (4)

P a t e n t a n s p r ü c h e 1. Aqueous textile finishing agent according to the main patent application P 15 94 899.9 based on 1,3-dimethylol-4,5-dihydroxy-2-imidazolidinone, one Sequestering agent and a catalyst, d a d u r c h e k e n n n z e i c h -n e t that the catalyst used is a magnesium or aluminum salt, such as magnesium chloride, Contains aluminum chloride, magnesium nitrate or mixtures thereof. 2. Method for finishing textile materials based on of cellulose, d u rc h e k e n n -z e c h fl e t that one is the aqueous textile finishing agent according to claim 1 applies to the material. 3. The method according to claim 2, d a d u r c h g e k e n n -z e i c h n e t that one can use the aqueous textile finishing agent, which contains the catalyst in a Contains an amount of 5.5 to 20.0% by weight, based on the weight of the imidazolidinone, applies in such an amount to the cellulose-based textile material that this 1.0 to 25.0 wt .-% 1,3-dimethylol-4,5-dihydroxy-2-imidazolidinone, based based on the weight of the tissue, and about 0.025 to 3.0% by weight of the sequestering agent, based on the weight of the fabric, contains the textile material at a temperature Dries from 790C to 1210C - and hardens at a temperature of 1490C to 21600. 4. Treated textile material based on cellulose, available according to a method of claims 2 and 3.