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 invention relates to a process for finishing textile goods made from natural or regenerated cellulose, which has been pretreated with liquid ammonia, using N-monomethylol or N-monoalkoxymethyl compounds of 4-hydroxy or 4-alkoxy-5.5- dimethyl propylene ureas as finishing agents.
• “equipping” is meant the shrink and wrinkle-resistant equipment - also called “easy-care equipment”. This is done with aminoplast formers, that is to say substances which contain methylolated amide groups on the nitrogen, in particular methylolated urea and its derivatives, methylolated melamine and methylolated carbamate.
• aminoplast formers that is to say substances which contain methylolated amide groups on the nitrogen, in particular methylolated urea and its derivatives, methylolated melamine and methylolated carbamate.
• fixing the N-methylol groups react under the influence of heat and catalysts with the hydroxyl groups of the cellulose with acetal formation and crosslinking. It is usually difficult to avoid that the mechanical strength of the cellulose drops significantly. For example, tensile strength losses of the order of 30 to 40% and more are the order of the day.
• R 1 is an alkyl radical having 1 to 18 carbon atoms
• R 2 , R 3 and R 6 are hydrogen atoms or low molecular weight alkyl radicals
• R 4 and R 5 are low molecular weight alkyl radicals e (cf. DE-OS 20 06 516).
• the invention was therefore based on the object of developing a finishing process for textiles made of cellulose pretreated with liquid ammonia, which combines high finishing effects (improvement in the shrink and wrinkle resistance) with the least possible influence on the textile handle and, above all, on the tear strength.
• the substances of formula III of claim can by reacting urea with isobutyraldehyde and formaldehyde in a molar ratio of 1: 1: 1 in aqueous solution or in an alcohol of formula R 2 OH and in the presence of a non-oxidizing mineral acid at temperatures between 30 and 120 ° C and subsequent further alkaline reaction with 1 mol of formaldehyde.
• the resulting monomethylol compound can be etherified with an alcohol R 1 OH in an acidic medium.
• the alcohol R 2 OH can also be a glycol of the formula with R 3 being hydrogen or methyl.
• R 3 should not be exclusively methyl if R 1 is propyl, because then the entire molecule would no longer be sufficiently water-soluble. Sufficient water solubility of the compounds of formula III is of course a prerequisite for their usability.
• substances of the formula III are: N-monoethoxymethyl-4-ethoxy-5,5-dimethylpropyleneurea, N-monomethoxyethoxymethyl-4-methoxyethoxy-5,5-dimethylpropyleneurea and, because of them Easy accessibility preferred, N-monomethylol-4-hydroxy-5,5-dimethyl-propyleneurea (IV), N-monomethylol-4-methoxy-5,5-dimethyl-propylene urea (V) and N-monomethoxymethyl-4-methoxy -5,5-dimethyl-propyleneurea (VI).
• finishing agents of the formula III come on the market as 40 to 60% aqueous solutions or dispersions and are diluted with water for use. They have proven themselves particularly well on textile material made of cellulose, which has been pretreated with ammonia. You can click on for the application of N-methylol compounds The usual textile processes can be used.
• the concentration of the finishing bath of substances of the formula III is generally between 40 and 200 g / l. Preference is given to impregnating a foulard. The soaked material is freed in a known manner by squeezing off excess impregnation liquid.
• the fiber application to substances of the formula III should be in the range from 50 to 100, preferably 60 to 70,% by weight, based on the textile material to be finished.
• the impregnated fiber material is heated in the presence of acidic or potentially acidic catalysts to a temperature of 110 to 230 ° C., preferably 120 to 210 ° C. Under these conditions, the reaction is generally completed in 10 seconds to 6 minutes, preferably in 20 seconds to 2 minutes.
• Acidic or potentially acidic catalysts are known and used for the purpose of finishing with N-methylol or N-alkoxymethyl compounds.
• inorganic and organic acids such as sulfuric acid, hydrochloric acid, phosphoric acid, boric acid, oxalic acid, and salts which react acidically or which form acids, for example by hydrolysis, during their use, for example ammonium salts of strong acids , Magnesium chloride, zinc chloride and zinc nitrate.
• Mixtures of several catalysts can often also be used with advantage.
• the reaction of the substances of formula III with the textile material is carried out in the presence of these catalysts.
• catalysts preferably in the form of aqueous solutions
• the catalysts are preferably added directly to the impregnating bath containing the substances of the formula III.
• catalyst concentrations between 1 and 40 g / l have proven useful for the equipment.
• hydrophobicizing, softening, leveling, wetting and finishing agents can also be used.
• Hydrophobing agents are, for example, aluminum or zirconium-containing paraffin wax emulsions and silicone-containing preparations. Oxygenation products of higher fatty acids, fatty alcohols or fatty acid amides, higher molecular weight polyglycol ethers, higher fatty acids, fatty alcohol sulfonates, N-stearylurea compounds and stearylamidomethylpyridinium chloride may be mentioned as plasticizers.
• leveling agents for example, water-soluble salts of acidic esters of polybasic acids with ethylene oxide or propylene oxide adducts of longer-chain basic compounds which can be alkoxylated can be used.
• wetting agents are salts of alkylnarthalene sulfonic acids, the alkali salts of sulfonated amber acidic edioethyl ester and the add-on products of alkylene oxides to fatty alcohols, alkylphenols, fatty amines and the like.
• Suitable finishing agents are, for example, cellulose ethers or esters and alginates, and also solutions or dispersions of synthetic polymers and polycondensates, for example of polyethylene, polyamides, oxyethylated polyamides, polyvinyl ethers, polyvinyl alcohols, polyacrylic acid or their esters and amides, and of corresponding polymethacrylic compounds, polyvinylpropionates Polyvinylpyrrolidone, from copolymers, for example from vinyl chloride and acrylic acid esters, from butadiene and styrene or acrylonitrile or from 1,1-dichloroethylene, ⁇ -chloroalkylacrylic acid esters or vinyl ethyl ether and acrylic acid amide or the amides of crotonic acid or maleic acid or from N-methylol methacrylic acid amide and others polymerizable compounds.
• These additional auxiliaries are generally used in amounts of 0.3 to 4%, preferably 1 to 2.
• the experience according to the invention results in a cellulose-pretreated ammonia-treated equipment that provides sufficient shrink and cut resistance with high chlorine resistance, does not significantly influence the textile feel and has sufficient hydrolysis resistance for use purposes with a loss of tensile strength of rarely more than 20%, based on the tensile strength of the goods pretreated with ammonia. Further advantageous properties emerge from the examples.
• the equipment according to the invention thus results in a formaldehyde odor level (at or below 1000 ppm) which is sufficiently low for the clothing industry and low abrasion losses at various condensation temperatures.
• Shirting (100% cotton, sanfor-set; calico) was padded with the liquor to 60 to 70% liquor absorption.
• the fabric was then dried in a stenter at 107 ° C. for 60 seconds.
• the fabric thus dried was condensed on the tenter for 90 seconds at various temperatures in accordance with Table 4.
• the test was again carried out according to the usual AATCC test methods, in particular for smoothness, shrinkage (warp and weft) and loss of tensile strength due to possible damage from chlorine.
• the evaluation is shown in Table 4.
• the finishing agent according to Example 1 shows very little or no loss of tensile strength due to chlorine after washing with chlorine-containing detergent.
• the fleet intake was 60% in each case.
• the samples were dried and condensed at 205 ° C for 20, 60 and 120 seconds.
• the condensed samples were checked for discoloration.
• the test for smoothness, shrinkage (warp and weft), free formaldehyde content and chlorine damage according to the test methods described in Example 1 only extended to the samples condensed for 20 seconds. The results are summarized in Table 5.
• the finishing agent according to Example 1 delivers flawless and in some respects excellent results.

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

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• 1980
  • 1980-01-25 US US06/115,264 patent/US4295847A/en not_active Expired - Lifetime
• 1981
  • 1981-01-19 EP EP81100364A patent/EP0033115A3/fr not_active Withdrawn

Non-Patent Citations (3)

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