Classifications

• • C—CHEMISTRY; METALLURGY
  • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
  • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/16—Organic compounds
  • C11D3/37—Polymers
  • C11D3/3788—Graft polymers
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
  • D06L1/00—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods
  • D06L1/12—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods using aqueous solvents
  • D06L1/14—De-sizing
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
  • D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
  • D06L4/10—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which develop oxygen
  • D06L4/12—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which develop oxygen combined with specific additives

Definitions

• the present invention relates to a washability improver for a textile article. More particularly, the present invention relates to a washability improver for a textile article, which has a high alkali resistance and is used at the steps of desizing, scouring, bleaching or soaping cellulose fibers such as cotton and flax, synthetic fibers such as polyester, nylon and acrylic fibers, and mixed fibers thereof, mercerizing cotton, alkali-reducing polyester fibers, and washing a dyeing bag.
• Bleaching by hydrogen peroxide is generally carried out under an alkaline condition of a pH value of 10 to 12, and the reaction effectively improving the whiteness is expressed by the following formula: H2O2 ---> HO2 ⁇ + H+ (1)
• sodium silicate is frequently used as the stabilizer, but the use of sodium silicate is disadvantageous in that water-insoluble salts of calcium and magnesium, i.e., silicate scales, are formed, and these insoluble salts adhere to and are deposited on a bleached article and a bleaching apparatus to cause a silicate problem.
• stabilizers other than sodium silicate there are known organic chelating agents such as EDTA and DTPA, inorganic chelating agents such as condensed phosphates, and water-soluble proteins such as soybean protein and casein (Japanese Examined Patent Publication No. 50-34675). These stabilizers do not cause a silicate problem in the batchwise method, but in the continuous method, the stabilizing effect attained by these stabilizers is much lower than the effect attained by sodium silicate and satisfactory results cannot be obtained if the operation is carried out on an industrial scale.
• organic chelating agents such as EDTA and DTPA
• inorganic chelating agents such as condensed phosphates
• water-soluble proteins such as soybean protein and casein
• a stabilizer comprising, as the main ingredient, a salt of poly- ⁇ -hydroxyacrylic acid, for example, Neorate PLC-700 (supplied by Nikka Chemical) (Japanese Unexamined Patent Publication No. 62-185797), has an excellent stabilizing effect, gives a whiteness comparable to that given by sodium silicate, and does not cause a silicate problem.
• a salt of poly- ⁇ -hydroxyacrylic acid for example, Neorate PLC-700 (supplied by Nikka Chemical) (Japanese Unexamined Patent Publication No. 62-185797)
• Polyshosphoric acid salts such as sodium tripolyphosphate, and aminocarboxylate type organic chelating agents such as ethylenediamine-tetraacetic acid (EDTA) and diethylenetriamine-pentaacetic acid (DTPA), which are used at the steps of desizing, scouring, bleaching and soaping cellulose fibers, mercerizing cotton, alkali-reducing polyester fibers and washing a dyeing bag, are disadvantageous in that, in a region of high pH values, the chelating capacity is reduced, the chelating agents are insolubilized in the presence of an excessive amount of a hardness component, to reduce the chelating effect, and scales are formed by the hydrolysis. Accordingly, satisfactory results cannot be obtained.
• EDTA ethylenediamine-tetraacetic acid
• DTPA diethylenetriamine-pentaacetic acid
• a washability improver for a textile article which comprises a reaction product obtained by radicalpolymerization of at least one monomer selected from the group consisting of acrylic acid, methacrylic acid, maleic acid and salts thereof in the presence of poly- ⁇ -hydroxyacrylic acid or a salt thereof.
• the washability improver of the present invention is formed by radical-polymerizing at least one member selected from the group consisting of acrylic acid, methacrylic acid, maleic acid and acid and salts thereof in the presence of poly- ⁇ -hydroxyacrylic acid or a salt thereof.
• the poly- ⁇ -hydroxyacrylic acid or salt thereof used in the present invention may be a depolymerization product thereof.
• the molecular weight of the poly- ⁇ -hydroxyacrylic acid or salt thereof is 500 to 1,000,000, most preferably 1,000 to 100,000.
• the depolymerization can be effected with a radical initiator such as hydrogen peroxide or a persulfate.
• water-soluble salts such as sodium, potassium, ammonium, monoethanolamine and diethanolamine salts are used.
• salt of acrylic acid methacrylic acid or maleic acid
• water-soluble salts such as sodium, potassium, ammonium, monoethanolamine and diethanolamine salts are used.
• the polymerization is carried out in the presence of a free-radical initiator.
• a free-radical initiator preferably persulfates such as potassium persulfate, sodium persulfate and ammonium persulfate, redox type initiators such as a combination of a persulfate and sodium bisulfite, hydrogen peroxide, and water-soluble azo type initiators are used.
• the initiator is used in an amount of 0.1 to 1.0 part by weight per 100 parts by weight of the monomeric acid or the salt thereof.
• the poly- ⁇ -hydroxyacrylic acid or the salt thereof, and acrylic acid, methacrylic acid, maleic acid or the salt thereof are used at a weight ratio of from 10/1 to 1/10.
• the polymerization temperature and time are preferably 50 to 90 °C and 2 to 5 hours.
• the polymerization is preferably carried out by using an aqueous solution of the poly- ⁇ -hydroxyacrylic acid or the salt thereof as a medium.
• a water-miscible solvent can be added to this aqueous solution, if necessary.
• the degree of polymerization can be effectively adjusted by using a chain transfer agent such as octyl thioglycolate.
• the concentration of the washability improver is at least 0.05 g/l, preferably at least 0.2 g/l, as a product having a solid content of 20%.
• washability improver of the present invention When the washability improver of the present invention is used as a stabilizer for the hydrogen peroxide bleaching, batchwise apparatuses such as a wince dyeing machine, a jet dyeing machine and a cheese dyeing machine, and continuous apparatuses such as a J-box, an L-box and a purple range can be used as the bleaching machine.
• a wince dyeing machine, a jet dyeing machine, a cheese dyeing machine, a jigger dyeing machine, a washer, an open soaper, and a relaxer can be used.
• the washability improver can be incorporated into a mercerizing bath or soaping bath of a yarn mercerizing machine or a knitted or woven fabric mercerizing machine.
• the washability improver can be incorporated into a reduction bath or soaping bath of a hanging, pad steam or cold pad batch, and when the washability improver is used for washing a dyeing bath, a jet dyeing machine, a beam dyeing machine, a cheese dyeing machine, and an Over maier dyeing machine can be used.
• the washability improver of the present invention When the washability improver of the present invention is used at the steps of desizing, scouring and bleaching cellulose fibers, not only a hydrogen peroxide-stabilizing effect but also a high decomposition-promoting effect can be attained, and an abnormal decomposition by metal ions such as iron, copper and calcium ions can be controlled. Furthermore, a good dispersibility is given to decomposition products and a re-deposition of decomposition products can be prevented.
• the washability improver of the present invention When the washability improver of the present invention is used at usual scouring and soaping steps, the dispersibility of a sizing agent, an oiling agent, an unfixed dye, and various scums is improved, and good results can be obtained at subsequent dyeing and finishing steps.
• the washability improver When the washability improver is used at the step of mercerizing cotton and flax, since the alkali resistance of the washability improver is good, a decomposition or separation of the washability improver per se does not occur, the deposition of scales on a roll or the like is prevented, and the dispersibility of the bath is improved.
• the washability improver of the present invention When used for the alkali reduction of polyester fibers, the effect of removing a polyester oligomer, titanium oxide and the like by washing is enhanced and a good touch can be obtained, and level dyeing can be attained at the subsequent dyeing step.
• the washability improver of the present invention improves the washability improver of the present invention.
• excellent dispersibility-improving, washability-improving, and metalremoving effects can be attained, and a soil deposition on fibers and machines and the formation of scales can be prevented.
• the washability improver of the present invention is used for a continuous treatment, the bath stability is good and a satisfactory effect is obtained, and the treatment can be performed at a high efficiency and a high quality can be given to the product.
• EDTA-4Na tetrasodium ethylenediamine-tetraacetate
• the polymer blend of sodium poly- ⁇ -hydroxyacrylate and sodium polyacrylate has an inferior alkali resistance, but the product of the present invention has a good alkali resistance and shows a stable compatibility even under such a high alkali concentration condition as adopted at the mercerization of cotton or the alkali reduction of polyester fibers.
• a bleaching liquid comprising 30 cc/l of 35% H2O2 , 7 g/l of NaOH, 0.1 g/l of MgSO4 ⁇ 7H2O, 2 ppm of Fe2+ and 5 g/l of a sample was prepared and the bleaching treatment was carried out at 95 °C for 30 minutes, the residual amount of hydrogen peroxide was determined according to the oxidation-reduction titration method, and the residual ratio (%) was calculated. The results are shown in Table 2. Table 2 Sample H202 Residual Ratio (%) product 1 of the present invention 78 product 2 of the present invention 70 comparative product 1 75 comparative product 2 0 comparative product 3 3 blank 2
• the product of the present invention has a very good hydrogen peroxide-stabilizing effect and is especially preferably useful for continuous bleaching.
• the sodium carboxylate and the chelating agent EDTA have no stabilizing effect.
• a green cotton woven fabric (desized) was padded in a bleaching liquid comprising 30 cc/l of 35% H2O2 , 4 g/l of NaOH (flake), 2 g/l of Sunmorl CS-1 (scouring penetrant supplied by Nikka Chemical) and 3 g/l of a sample, and the bleaching was carried out at 95 °C for 30 minutes by the pad steam method.
• the whiteness was evaluated by measuring the reflectance at 440 m ⁇ by using a colorimeter, Macbeth MS-2020. The results are shown in Table 3.
• Table 3 Sample Whiteness (%) product 1 of the present invention 75.5 product 2 of the present invention 74.8 comparative product 1 75.4 comparative product 2 72.1 comparative product 3 72.8 blank 71.9 Note, the whiteness of the starting fabric was 56.3%.
• the product of the present invention gives a greater whiteness than the sodium polycarboxylate and the chelating agent.
• a cotton broadcloth printed with a reactive dye was soaped at 95 °C for 15 minutes with a soaping solution comprising 1 g/l of Lipotol RK-S (soaping agent for reactive dyes supplied by Nikka Chemical) and 1 g/l of a sample.
• the staining of the white area of the print was checked by using a gray scale. The results are shown in Table 6.
• the product of the present invention has a soaping effect-improving capacity.
• the comparative product 3 (chelating agent, EDTA-4Na) is discolored by the dyes.
• a polyester pongee was immersed at a bath ratio of about 1/30 in an alkali-reducing bath comprising 30 g/l of NaOH and 1 g/l of a sample and the hanging alkali reduction was carried out at 95 °C for 2 hours. The turbidity of the reducing bath was visually judged, the reduction ratio was determined and the touch was evaluated. The results are shown in Table 7.
• the comparative product 1 was not tested because the alkali resistance was poor.
• Table 7 Sample Turbidity of Reducing Bath Reduction Ratio (%) Touch product 1 of the present invention o 9.2 o product 2 of the invention o 9.0 o comparative product 2 ⁇ 8.0 o - ⁇ comparative product 3 o 8.8 o blank x 8.9 o - ⁇ Note Turbidity o: transparent ⁇ : opaque x: scums present Touch o: good ⁇ : medical
• the product of the present invention has a good alkali resistance and an excellent dispersibility, and does not inhibit the alkali reduction.
• the product of the present invention has a scum dispersion-promoting effect.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Wood Science & Technology (AREA)
• Organic Chemistry (AREA)
• Detergent Compositions (AREA)
• Coloring (AREA)

Applications Claiming Priority (2)

Publications (2)

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ID=16705758

Family Applications (1)

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Cited By (5)

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Citations (5)

• 1989
  • 1989-08-25 JP JP1217534A patent/JPH0791557B2/ja not_active Expired - Fee Related
• 1990
  • 1990-08-22 EP EP19900116097 patent/EP0414228A3/en not_active Withdrawn

Patent Citations (5)

Non-Patent Citations (1)

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