EP0017190A1 - Procédé de désencollage oxydatif - Google Patents

Procédé de désencollage oxydatif Download PDF

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Publication number
EP0017190A1
EP0017190A1 EP80101673A EP80101673A EP0017190A1 EP 0017190 A1 EP0017190 A1 EP 0017190A1 EP 80101673 A EP80101673 A EP 80101673A EP 80101673 A EP80101673 A EP 80101673A EP 0017190 A1 EP0017190 A1 EP 0017190A1
Authority
EP
European Patent Office
Prior art keywords
desizing
treated
persulfate
surfactant
weight
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP80101673A
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German (de)
English (en)
Other versions
EP0017190B1 (fr
Inventor
Klaus Adrian
Günter Rösch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hoechst AG
Original Assignee
Hoechst AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Hoechst AG filed Critical Hoechst AG
Priority to AT80101673T priority Critical patent/ATE3158T1/de
Publication of EP0017190A1 publication Critical patent/EP0017190A1/fr
Application granted granted Critical
Publication of EP0017190B1 publication Critical patent/EP0017190B1/fr
Expired legal-status Critical Current

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Classifications

    • 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

Definitions

  • persulfates for the oxidative desizing of fabrics made of cellulose fibers and their blends with synthetic fibers, since persulfate is a starch such as e.g. Potato starch, rice starch, maize starch and tapioca, which are used to size fabrics, break down excellently in the presence of alkali.
  • a disadvantage of desizing with persulfates is that damage to the cellulosic fibers can easily occur, which is expressed in a sharp drop in the DP grade. Such fiber damage occurs above all if there is insufficient alkali in the treatment liquor and if the amount of 3-5 g / l of persulfate required for complete desizing is used.
  • the invention relates to a new oxidative desizing agent consisting of 10-80, preferably 50-80% by weight of a surfactant and 20-90, preferably 20-50% by weight of potassium persulfate. If necessary, this desizing agent can still contain 5-25% by weight of a solubilizer while reducing the proportion of surfactant and persulfate.
  • Anionic and nonionic surfactants come into consideration as surfactants, mainly from the following classes of compounds: Alkanesulfonates with 8-20 C atoms, especially sec. Alkane sulfonates, C 8 -, C 20 alkylbenzene sulfonates, C 8 - C 2O olefin sulfonates, C 10 - C 18 -Fettalkoholsulfonate, Polyäthylenglykolemit 6-20 units of ethylene oxide, C 10 - C 18 -fatty - alcohol oxäthylate having 6 - 24 units Ethylene oxide, C 4 - C 1 2-alkylphenol oxyethylates with 6 - 20 units of ethylene oxide.
  • the sec are particularly preferred. Alkanesulfonates, fatty alcohol oxyethylates and alkylphenol oxyethylates. These surfactants can be present in the desizing agent according to the invention alone or in combination with one another. Mixtures in the ratio 1: 9 to 9: 1 of an anionic and a nonionic surfactant are preferred, in particular mixtures of sec. Alkanesulfonate with fatty alcohol oxyethylates and / or alkylphenol oxyethylates.
  • surfactants are contained in the desizing agent according to the invention in the amount specified above, the remainder missing in 100% being potassium persulfate. It may be advantageous to also use a solubilizer, such as isopropanol, butyl glycolate, cyclohexanol or butyl diglycol. The use of such solubilizers is particularly recommended if the desizing agent contains high concentrations of anionic surfactant.
  • the solubilizers can make up 5 to 25% by weight of the desizing agent with a corresponding reduction in the limit values specified above for the surfactants and the potassium persulfate.
  • This surfactant-persulfate mixture is suitable for the oxidative desizing of fabrics that contain cellulose fibers alone or in a mixture with synthetic fibers.
  • the fabric is impregnated with an aqueous solution of this desizing agent with the simultaneous addition of alkali, preferably sodium hydroxide solution.
  • alkali preferably sodium hydroxide solution.
  • the material impregnated in this way is squeezed to a moisture content of approximately 100% and then treated at 20-160 ° C for a period of between 30 seconds and 24 hours.
  • the length of the treatment time depends on the respective process-specific temperature and type of dwell unit.
  • the content of the desizing agent described above in the aqueous liquor is 2 to 20, preferably 3-8 g / l.
  • the amount of alkali to be added is chosen so that the pH of the liquor is always above 10. This generally requires 1 to 100 g, preferably 3 to 40 g / l, of solid sodium hydroxide.
  • the fabric is conveniently with hot water at about 85 - 60 seconds rinsed and washed cold below - 95 0 C during the 10th
  • alkali and detergent are expediently added to the wash water.
  • This desizing process can also be combined with a conventional bleaching process.
  • the fabric is impregnated with an aqueous liquor which, in addition to the desizing agent and alkali in the amount and composition given above, also contains 30 to 60 ml of H 2 O 2 (35%) in one liter of liquor and sodium silicate as stabilizer.
  • the impregnated fabric is again squeezed to about 100% and stored at room temperature for 6 to 24 hours.
  • the fabric is then washed out, with alkali and detergent being added to the wash water to improve the size degradation.
  • the fabric treated with the combination of surfactants and persulfate described above shows a significantly better disintegration of the cotton seed husks, so that the fabric can be bleached in a much shorter time with a subsequent bleaching treatment.
  • the amount of persulfate required for desizing can be reduced to approximately 25% of the amount of persulfate that would be required for desizing alone with persulfate. Through this Reducing the amount of persulfate achieves a substantial reduction in fiber damage.
  • the persulfate and the surfactant are not added separately to the impregnation liquor, but that the mixture of persulfate and surfactant is first prepared and this mixture is then added to the liquor.
  • Cotton twill which is sized with starch, is impregnated with an aqueous solution of the following composition:
  • the impregnated material is squeezed to 100% residual moisture and treated with steam on a steamer at 103 - 105 ° C.
  • the goods are then washed free of alkali with hot water.
  • the goods treated in this way have a whiteness of 62.5%.
  • the degree of desizing; measured according to the violet scale TEGEWA is 8 - 9.
  • the DP value of the treated material is 2400.
  • the goods treated in this way have a whiteness of 61.0%.
  • the degree of desizing measured according to the violet scale TEGEWA is only 6.
  • Cotton twill as in Example 1 is impregnated with an aqueous solution of the following composition:
  • the impregnated material is squeezed to 100% residual moisture, wound up and rests in an air-free vapor atmosphere with 100% relative humidity at 95 ° C for 1 hour.
  • the material is then treated as in Example 1.
  • the goods treated in this way have a whiteness of 63.0%.
  • the degree of desizing measured according to the violet scale TEGEWA is 8.
  • the DP value of the treated material is 2350.
  • Example 1 The material is then treated as in Example 1.
  • the goods treated in this way have a whiteness of 64.0%.
  • the degree of desizing measured according to the violet scale TEGEWA is only 5.
  • the DP value of the treated material dropped to 2050.
  • Cotton twill as in Example 1 is impregnated with a solution of the following composition:
  • the impregnated material is squeezed to 100% residual moisture, wrapped on a pillow and covered with plastic film to prevent it from drying out.
  • the pill is allowed to linger at room temperature for 16-20 hours.
  • Example 1 The material is then washed out as described in Example 1.
  • the goods treated in this way have a whiteness of 86%.
  • the degree of desizing measured according to the violet scale TEGEWA is 8 - 9.
  • the DP value of the treated material is 2550.
  • the impregnated material is squeezed to 100% residual moisture, wrapped on a pillow and covered with plastic film to prevent it from drying out.
  • the pill is allowed to linger at room temperature for 16-20 hours.
  • the material is then treated as in Example 1.
  • the goods treated in this way have a whiteness of 85.5%.
  • the degree of desizing measured according to the violet scale TEGEWA is 6.
  • the DP value of the treated material 2250.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detergent Compositions (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Catalysts (AREA)
EP80101673A 1979-04-02 1980-03-28 Procédé de désencollage oxydatif Expired EP0017190B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80101673T ATE3158T1 (de) 1979-04-02 1980-03-28 Verfahren zum oxidativen entschlichten.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792913177 DE2913177A1 (de) 1979-04-02 1979-04-02 Oxidatives entschlichtungsmittel und verfahren zum oxidativen entschlichten
DE2913177 1979-04-02

Publications (2)

Publication Number Publication Date
EP0017190A1 true EP0017190A1 (fr) 1980-10-15
EP0017190B1 EP0017190B1 (fr) 1983-04-27

Family

ID=6067214

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80101673A Expired EP0017190B1 (fr) 1979-04-02 1980-03-28 Procédé de désencollage oxydatif

Country Status (8)

Country Link
US (1) US4309298A (fr)
EP (1) EP0017190B1 (fr)
JP (1) JPS55132766A (fr)
AT (1) ATE3158T1 (fr)
BR (1) BR8002007A (fr)
CA (1) CA1134107A (fr)
DE (2) DE2913177A1 (fr)
ZA (1) ZA801926B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0090351A2 (fr) * 1982-03-30 1983-10-05 Hoechst Aktiengesellschaft Agent de désencollage liquide oxydant et procédé pour le désencollage oxydant
EP0420802A2 (fr) * 1989-09-26 1991-04-03 Ciba-Geigy Ag Agent mouillant aqueux stable au stockage et peu moussant

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3202760A1 (de) * 1982-01-28 1983-08-04 Basf Ag, 6700 Ludwigshafen Waessrige suspensionen von peroxydisulfaten und ihre verwendung als oxidative entschlichtungsmittel fuer mit staerke geschlichtetes textilgut
US20010007277A1 (en) * 1999-09-28 2001-07-12 Peter Gordon Jobling Process and compositions for repulping paper

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE695120C (de) * 1936-03-23 1940-08-17 Friedrich Bohac Ing Verfahren zum Entschlichten von Textilwaren
FR1461989A (fr) * 1964-12-28 1966-12-09 Electrochimie Soc Procédé de désencollage de textiles cellulosiques
US3619111A (en) * 1970-02-17 1971-11-09 Du Pont Desizing, scouring and bleaching cotton/polyester fabrics containing portions dyed with sensitive dyestuffs
US3740188A (en) * 1971-08-02 1973-06-19 Fmc Corp Simultaneous desize-scour-bleach with activated hydrogen peroxide

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE381672B (sv) * 1971-07-15 1975-12-15 Mo Och Domsjoe Ab Flytande tvettmedelskomposition
US3796601A (en) * 1972-05-03 1974-03-12 Fmc Corp Pre-coronizing treatment for desizing glass fabric
US3990908A (en) * 1975-03-19 1976-11-09 Fmc Corporation Desizing glass fabric with sodium carbonate peroxide desizing solutions

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE695120C (de) * 1936-03-23 1940-08-17 Friedrich Bohac Ing Verfahren zum Entschlichten von Textilwaren
FR1461989A (fr) * 1964-12-28 1966-12-09 Electrochimie Soc Procédé de désencollage de textiles cellulosiques
DE1469325A1 (de) * 1964-12-28 1968-11-28 Degussa Verfahren zum Entschlichten von Textilien aus Cellulose
US3619111A (en) * 1970-02-17 1971-11-09 Du Pont Desizing, scouring and bleaching cotton/polyester fabrics containing portions dyed with sensitive dyestuffs
US3740188A (en) * 1971-08-02 1973-06-19 Fmc Corp Simultaneous desize-scour-bleach with activated hydrogen peroxide

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0090351A2 (fr) * 1982-03-30 1983-10-05 Hoechst Aktiengesellschaft Agent de désencollage liquide oxydant et procédé pour le désencollage oxydant
EP0090351A3 (en) * 1982-03-30 1985-05-15 Hoechst Aktiengesellschaft Liquid oxidant desizing agent, and process for oxidative desizing
EP0420802A2 (fr) * 1989-09-26 1991-04-03 Ciba-Geigy Ag Agent mouillant aqueux stable au stockage et peu moussant
EP0420802A3 (en) * 1989-09-26 1991-05-15 Ciba-Geigy Ag Aqueous, storage stable, low foaming wetting agent

Also Published As

Publication number Publication date
CA1134107A (fr) 1982-10-26
BR8002007A (pt) 1980-12-23
EP0017190B1 (fr) 1983-04-27
ZA801926B (en) 1981-03-25
DE2913177A1 (de) 1980-10-23
JPS55132766A (en) 1980-10-15
DE3062865D1 (en) 1983-06-01
ATE3158T1 (de) 1983-05-15
US4309298A (en) 1982-01-05

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