Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
  • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
  • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • D06M15/39—Aldehyde resins; Ketone resins; Polyacetals
  • D06M15/423—Amino-aldehyde resins

Definitions

• the water-insoluble urea-formaldehyde condensation products have been used repeatedly for improving textile fibers.
• Water-insoluble urea-formaldehyde condensation products can also be used according to the processes of British Patents 469,688 and 467,480 in such a manner that pigment-like precipitates consisting of discrete particles are produced on the fiber, whereby valuable matt eifects are obtained.
• the proof that the insoluble ureaformaldehyde condensation products are formed on the fiber as subdivided, pigment-like precipitates, in contradistinction to the processes according to which coherent films are produced, is given by the fact that the textile materials treated in such a manner, provided they consist of cellu-' lose or regenerated cellulose, clearly show the above mentioned reaction with an iodine solution in an aqueous solution of zinc chloride.
• solutions thus formed are strongly diluted with water whereby matting baths are obtained in which the textile materials are treated.
• water-soluble addition products such as monoand dimethylolurea, or from mixtures of the primary'parent materials, viz. urea and formaldehyde. Dilute solutions of such products to which acids are advantageously added as condensing agents, are then used as treating baths.
• the treatment itself regardless of whether one starts from preformed water-insoluble condensation products or whether the water-insoluble products are formed in the treating bath'only, is effected by two different methods.
• the material is treated for a relatively short time with the concentrated matting liquor containing watersoluble urea-formaldehyde addition products or the mixture of urea and formaldehyde, then squeezed out, and passed through a second bath containing the acid, whereby the separation of the insoluble pigment takes place while matting the material.
• Padding can also be effected only once by adding a suitable acid to the matting liquor. After padding the material must then be left to lie until the matt effect is obtained.
• the present process relates to a special form of carrying out the method of working designated in the foregoing as exhausting process, 1. e. only to that form of the exhausting process in which as parent materials water-soluble urea-formaldehyde addition products or mixtures of formaldehyde and urea are used.
• urea and formaldehyde such as monoand dimethylolurea or corresponding mixtures of urea and formaldehyde
• the condensation to the water-insoluble products is brought about by addition of small quantities of acids or condensing agents having an acid action, such as hydrochloric acid, sulfuric acid, phosphoric acid, bisulfate, zinc chloride and'the like. If this condensation takes place in the presence of textile materials the insoluble products which are graduv ally formed are precipitated on the textile materials with formation of the desired valuable fast matt effects, which are particularly fast to washing.
• baths which contain monomethylolurea or a mixture of urea with a water-soluble compound of urea which is correspondingly richer in formaldehyde, such as mixtures containing urea and dimethylolurea in molecular proportion 1:1.
• This latter procedure is particularly favorable on account of the easy producibility of the products.
• a matting bath is prepared by dissolving monomethylolurea or an approximately equimolecular mixture of dimethylolurea and urea in water and bringing the solution to the indicated concentration, while simultaneously acidifying the same.
• the material to be matted is then handled in the bath until the desired matting effect is attained which is brought about by the precipitation on the fiber of the urea-formaldehyde condensation products formed in the acid solution.
• a matting liquor containing per liter 7.5 grams of an approximately equimolecular mixture of dimethylolurea and urea and 3.5 grams of hydrogen chloride, to impart a strong matting to viscose rayon in the course of about hour in a bath which remain.
• the mattings obtained are not only stable to the treatment with water, but also to hot soap solutions, such as are used in the textile improving industry.
• the new process permits the matting of lustrous fibers before dyeing, which may be of advantage in many cases.
• the yield of matting increases with greater liquor concentrations.
• the handle of the material can be improved by using a softening agent.
• Example 1 illustrates the invenv tion Example 1 a fairly strong matting.
• the ratio of goods 6 to liquor is 1:8 there is obtained a stronger matting.
• Example 2 Viscose rayon yarn is matted for hour at 25 C. in a liquor which, calculated on the weight of the yarn, contains 7.5 per cent of an approximately equimolecular mixture of dimethylolurea and urea, and 12 per cent of hydrochloric acid of 20 B., the goods to liquor ratio being 1:10.
• matting liquor remains clear as water during the treatment; the viscose is strongly matted after rinsing and drying. An even stronger matting can be obtained by reducing the liquor ratio.
• Example 3 Viscose rayon yarn which has been matter for hour at ordinary temperature with 15 per cent of an approximately equimolecular mixture of dimethylolurea and urea and 12 per cent of hydrochloric acid of 20 B., the goods to liquor ratio being 1:10, shows a very strong matting, similar to the matting produced on rayon which has been matted in the viscose mass with titanium dioxide or similar pigments.
• Example 4 Acetate rayon is treated on a mechanical reel for hour at 25 C. in a liquor described in Example 2. The acetate rayon is matted in this manner, and the matting becomes fast to soaping also here.
• the matting of acetate rayon in cold baths has the advantage over the known hot matting in the presence of phenol or pine oil that the fibrous material is largely protected.
• Example 5 Viscose rayon yarn is treated for hour a. 30 C. with 7 .5 per cent of the equimolecular mixture from dimethylolurea and urea and 16 per cent of hydrochloric acid of 20 B., the goods to liquor ratio being 1: 15. There is obtained a matting of medium strength.
• Example 6 Rayon yarn is matted at 50 C. as prescribed in Example 2, the material being treated on a mechanical reel. There is obtained a strong matting.
• Example 7 Viscose rayon piece goods are dyed with the following dyestuif combination:
• Example 8 Copper rayon tricot is matted on a reel as described in Example 2 and then dyed with 6 per cent of Direct Chromium Black Blue B (Schultz Jul., 7th edition, 1st suppl. vol., page 89) in a bath containing Glaubers salt. There is obtained a dark blue matted dyeing.
• a process for matting textile material in a bath of matting liquor which comprises immersing the material to be treated in the said bath, and forming a water-insoluble urea-formaldehyde condensation product as a pigment-like precipitate in discrete particles in the bath and on the textile material therein by the action of precipitating acid in the bath on a water-soluble urea-formaldehyde condensation product, the
• matting liquor containing the water-soluble urea-formaldehyde condensation product in the form of a member of the group consisting of monomethylolurea and an approximately equimolecular mixture of dimethylolurea and urea, and the ratio of textile material to liquor not exceeding 1:15,
• a process for matting textile material in a bath of matting liquor which comprises immersing the material to be treated in the said bath, and forming a water-insoluble urea-formaldehyde condensation product as a pigmentlike precipitate in discrete particles in the bath and on the textile material therein by the action of precipitating acid in the bath on a watersoluble urea-formaldehyde condensation product, the matting liquor containing the watersoluble urea-formaldehyde condensation product in the form of methylolurea, and the ratio of textile material to liquor not exceeding 1:15;
• a process for matting textile material in a bath of matting liquor which comprises immersing the material to be treated in the said bath, and foming a water-insoluble urea-formaldehyde condensation product as a pigment-like precipitate in discrete particles in the bath and on the textile material therein by the action of precipitating acid in the bath on a water-soluble urea-formaldehyde condensation product, the matting liquor containing the water-soluble urea-formaldehyde condensation product in the form of methylolurea, and the ratio of textilev material to liquor not exceeding 1:10.
• a process for matting textile material in. a bath of matting liquor which comprisesimmersing the material to be treated in the said bath, and forming a water-insoluble urea-forma1de-' hyde condensation product as a pigment-like precipitate in discrete on the textile material therein by the action of hydrochloric acid in the bath on a water-soluble urea-formaldehyde condensation product, the matting liquor containing the water-soluble urea-formaldehyde condensation product in the form of a member of the group consisting of monomethylolurea and an approximately equimolecular mixture of dimethylolurea and urea, and the ratio of textile material to liquor not exceeding 1:15.
• a process for matting textile material in a bath of matting liquor which comprises immersing the material to be treated in the said bath,
• water-insoluble urea-formaldehyde condensation product as a pigment-like precipitate in discrete particles in the bath and on the textile material therein by the action of phosphoric acid in the bath on a water-soluble urea-formaldehyde condensation product, the matting liquor containing the water-soluble urea-formaldehyde condensation product in the form of a member of the group consisting of monomethylolurea and an approximately equimolecular mixture of dimethylolurea and urea, and the ratio of textile material to liquor not exceeding 1:15.
• a process for matting textile material in a bath of matting liquor which comprises immersing the material to be treated in the said bath, and forming a water-insoluble urea-formaldehyde condensation product as a pigment-like precipitate in discrete particles in the bath and on the textile material therein by the action of sulfuric acid in the bath on a water-soluble ureaformaldehyde condensation product, the matting liquor containing the water-soluble urea-formaldehyde condensation product in the form of a member of the group consisting of monomethylolurea and an approximately equimolecular mixture of dimethylolurea and urea, and the ratio of textile material to liquor not exceeding 1: 5-

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
• Chemical Or Physical Treatment Of Fibers (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=4518328

Family Applications (1)

Country Status (4)

Cited By (1)

• 0
  • BE BE434114D patent/BE434114A/xx unknown
• 1939
  • 1939-05-01 FR FR853669D patent/FR853669A/fr not_active Expired
  • 1939-05-02 US US271392A patent/US2302778A/en not_active Expired - Lifetime
  • 1939-05-02 GB GB13083/39A patent/GB528686A/en not_active Expired

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