EP0094656B1 - Procédé pour le désencollage et le blanchiment simultanés de matières textiles en fibres cellulosiques - Google Patents
Procédé pour le désencollage et le blanchiment simultanés de matières textiles en fibres cellulosiques Download PDFInfo
- Publication number
- EP0094656B1 EP0094656B1 EP83104775A EP83104775A EP0094656B1 EP 0094656 B1 EP0094656 B1 EP 0094656B1 EP 83104775 A EP83104775 A EP 83104775A EP 83104775 A EP83104775 A EP 83104775A EP 0094656 B1 EP0094656 B1 EP 0094656B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- liquor
- desizing
- bleaching
- hydrogen peroxide
- surfactant
- 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.)
- Expired
Links
- 238000004061 bleaching Methods 0.000 title claims description 21
- 238000000034 method Methods 0.000 title claims description 19
- 238000009990 desizing Methods 0.000 title claims description 17
- 239000000463 material Substances 0.000 title claims description 8
- 239000004753 textile Substances 0.000 title claims description 6
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 31
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 22
- 239000004094 surface-active agent Substances 0.000 claims description 12
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 8
- 239000004202 carbamide Substances 0.000 claims description 7
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 5
- FRPJTGXMTIIFIT-UHFFFAOYSA-N tetraacetylethylenediamine Chemical compound CC(=O)C(N)(C(C)=O)C(N)(C(C)=O)C(C)=O FRPJTGXMTIIFIT-UHFFFAOYSA-N 0.000 claims description 5
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 4
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 4
- 239000012190 activator Substances 0.000 claims description 3
- 238000010011 enzymatic desizing Methods 0.000 claims description 3
- 150000002978 peroxides Chemical class 0.000 claims description 3
- 229920003043 Cellulose fiber Polymers 0.000 claims description 2
- 150000002191 fatty alcohols Chemical class 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 239000004744 fabric Substances 0.000 description 17
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 15
- 238000005406 washing Methods 0.000 description 8
- 239000003513 alkali Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000005470 impregnation Methods 0.000 description 6
- 229920000742 Cotton Polymers 0.000 description 5
- 235000011121 sodium hydroxide Nutrition 0.000 description 5
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical group [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 5
- 239000003381 stabilizer Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- IGFHQQFPSIBGKE-UHFFFAOYSA-N Nonylphenol Natural products CCCCCCCCCC1=CC=C(O)C=C1 IGFHQQFPSIBGKE-UHFFFAOYSA-N 0.000 description 3
- 239000004115 Sodium Silicate Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- SNQQPOLDUKLAAF-UHFFFAOYSA-N nonylphenol Chemical compound CCCCCCCCCC1=CC=CC=C1O SNQQPOLDUKLAAF-UHFFFAOYSA-N 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 229910052911 sodium silicate Inorganic materials 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
- 102000013142 Amylases Human genes 0.000 description 2
- 108010065511 Amylases Proteins 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 235000019418 amylase Nutrition 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000003421 catalytic decomposition reaction Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000010012 oxidative desizing Methods 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 235000019353 potassium silicate Nutrition 0.000 description 2
- 238000009999 singeing Methods 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004382 Amylase Substances 0.000 description 1
- 206010013786 Dry skin Diseases 0.000 description 1
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical class OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical group [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 241000219422 Urtica Species 0.000 description 1
- 235000009108 Urtica dioica Nutrition 0.000 description 1
- 150000003855 acyl compounds Chemical class 0.000 description 1
- -1 alkane sulfonate Chemical class 0.000 description 1
- 150000004996 alkyl benzenes Chemical class 0.000 description 1
- 229940025131 amylases Drugs 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 229940077388 benzenesulfonate Drugs 0.000 description 1
- 239000008139 complexing agent Substances 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 229940088598 enzyme Drugs 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 125000000623 heterocyclic group Chemical group 0.000 description 1
- 238000009897 hydrogen peroxide bleaching Methods 0.000 description 1
- 150000002443 hydroxylamines Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000151 polyglycol Polymers 0.000 description 1
- 239000010695 polyglycol Substances 0.000 description 1
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Chemical compound [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 description 1
- 150000003871 sulfonates Chemical class 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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
- D06L1/02—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods using organic solvents
- D06L1/06—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
- 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 desizing and bleaching of fabrics with cellulose fibers is usually carried out continuously in several process stages.
- the starch (size) applied before the weaving process is removed, for example with enzymes (amylases).
- This process is generally followed by treatment with alkali.
- the fabric is impregnated with solutions which, in addition to sodium hydroxide solution, can also contain surfactants and, if necessary, complexing agents.
- the fabric is then steamed for up to 60 minutes. If there is no suitable damper available, the effect can also take several hours at room temperature.
- the alkali and impurities in the cotton are then removed by hot washing and rinsing.
- Another step is bleaching with hydrogen peroxide.
- the fabric is impregnated with a bleaching liquor which, in addition to hydrogen peroxide, also contains alkali in the form of sodium hydroxide solution.
- the sodium hydroxide solution is required to activate the hydrogen peroxide and the work is carried out to achieve a good balance at pH values above 10, preferably above pH 12.
- stabilizers is necessary.
- the most common stabilizer is water glass (sodium silicate), which releases oxygen in a controlled manner due to its buffering effect and also prevents catalytic decomposition by incorporating heavy metal ions into its molecular chain.
- the disadvantage here is that sodium silicate is difficult to remove from the fabric and thus leads to an unpleasant, sandy grip on the fabric. Furthermore, deposits of silicate residues on the machine parts such as rollers, apparatus walls, etc. can easily occur. Therefore, one tries to replace water glass with other, mostly organic stabilizers e.g. based on salts of ethylenediaminetetraacetic acid. However, these stabilizers mostly lack the buffering effect of sodium silicate, so that the release of oxygen is less controlled and the bleaching effects are worse. With this sequence of process stages, one obtains not only a high bleaching effect but also a perfect desizing.
- the process according to the invention is carried out by the processes customary for bleaching, for example in the form of hot or cold bleaching.
- the fabric is impregnated with a liquor of the composition described above, squeezed to a liquor absorption of approximately 60 to 120% by weight and then steamed to a temperature of approx. 40 to 140, preferably 80 to 105 ° C heated.
- the duration of treatment depends on the respective temperature and can be between about 2 minutes and several hours.
- cold bleaching the impregnated goods are left to stand at room temperature for 8 to 24 hours, preferably 12 to 18 hours, depending on the degree of desizing and bleaching required. In both cases, the goods are finally washed and dried.
- the fabric can also be treated continuously in a long liquor of the composition given above, for example at a liquor ratio of approximately 1:10.
- the temperature of the bath is about 50 to 95 °, preferably 60 to 85 ° C and the treatment time is about 10 to 40 minutes.
- the hydrogen peroxide required for the process according to the invention is preferably used in the form of the commercially available aqueous 35% solution.
- the above-mentioned limit values of 10 and 80 ml for hydrogen peroxide relate to this concentration.
- All products that are known to the person skilled in the art under this term are suitable as surfactants.
- Commercial surfactants are preferably taken from the following groups: sec. Alkanesulfonates, alkylphenol sulfonates, nonylphenol oxethylates and fatty alcohol oxethylates. These surfactants serve for better wetting of the goods with the fleet.
- Sodium bicarbonate and triethanolamine in particular are used as weakly alkaline compounds.
- Peroxide activators are all compounds which are already known for this purpose, such as acylated hydroxylamines, acylamines and acylated heterocycles (see text. Kir Intern. 1974, p. 1392 ff.). Particularly preferred acyl compounds are tetraacetylethylenediamine and tetraacetylglycoluril.
- the method according to the invention permits simultaneous desizing and bleaching in a bath, which results in a significant simplification in comparison with the conventional procedure with a separate bleaching and desizing bath.
- Another major advantage of the process described here is that one only works in the weakly alkaline range. This avoids the risk of damage to the fibers due to degradation, as can occur with conventional bleaching in the strongly alkaline range Stabilizing agents are connected.
- the fabric was heated to 100 ° C. and stored in a storage device at this temperature for 20 minutes. Then was washed or rinsed on a continuous washing machine 2x at 90 ° C, 2x at 60 ° C and 2x cold.
- the material had the following data:
- the fabric After impregnation, the fabric was wound up on a dock and left to stand at room temperature for 16 hours. It was then washed out continuously on 2 units of a 6-box washing machine with the addition of 3 ml / l sodium hydroxide solution 50% and 3 ml / l of the surfactant mixture specified above. In 2 further boxes, rinsing was carried out at 60 ° C. and 2xcold.
- the fabric showed the following values:
- the fabric After washing, rinsing and drying, the fabric had the following values:
- the squeezing effect was 90% and the liquor exchange during the impregnation was found to be 85%.
- the material was also brought to 100 ° C. with steam and left at this temperature for 30 minutes. It was then washed and rinsed in the manner indicated above.
- the goods had the following properties:
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Detergent Compositions (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Claims (4)
1. Procédé de désencollage et de blanchiment simultanés de matériaux textiles contenant des fibres cellulosiques caractérisé en ce qu'on traite le matériau textile avec un bain qui contient dans 1 litre d'eau:
a) de 1 à 10 g d'activateur peroxydique,
b) de 10 à 80 ml de peroxyde d'hydrogène,
c) de 1 à 10 g d'urée,
d) de 1 à 10 g d'un agent tensio-actif et un composé donnant lieu à une réaction faiblement alcaline en une quantité telle que le pH du bain soit compris entre 7 et 8.
2. Procédé selon la revendication 1 caractérisé en ce qu'on traite le matériau textile avec un bain qui contient:
a) de 1 à 3 g de tétraacétyléthylènediamine,
b) de 15 à 60 ml de peroxyde d'hydrogène,
c) de 3 à 6 g d'urée et
d) de 3 à 6 g d'agent tensio-actif.
3. Procédé selon la revendication 1, caractérisé en ce qu'on traite le matériau textile avec un bain qui contient comme agent tensio-actif un alcanesulfonate secondaire, un alkylphénolsulfonate, un nonyl- phénoloxéthylate ou un oxéthylate d'alcool gras et comme composé donnant lieu à une réaction faiblement alcaline du bicarbonate de sodium ou la triéthanolamine.
4. Procédé selon la revendication 1, caractérisé en ce qu'on ajoute au bain un agent de désencollage enzymatique.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3218889 | 1982-05-19 | ||
| DE3218889A DE3218889A1 (de) | 1982-05-19 | 1982-05-19 | Verfahren zum gleichzeitigen entschlichten und bleichen von textilmaterial aus cellulosefasern |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0094656A2 EP0094656A2 (fr) | 1983-11-23 |
| EP0094656A3 EP0094656A3 (en) | 1984-04-04 |
| EP0094656B1 true EP0094656B1 (fr) | 1986-08-13 |
Family
ID=6164035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP83104775A Expired EP0094656B1 (fr) | 1982-05-19 | 1983-05-14 | Procédé pour le désencollage et le blanchiment simultanés de matières textiles en fibres cellulosiques |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US4539007A (fr) |
| EP (1) | EP0094656B1 (fr) |
| JP (1) | JPS58208463A (fr) |
| KR (1) | KR840004797A (fr) |
| BR (1) | BR8302622A (fr) |
| CA (1) | CA1202919A (fr) |
| DE (2) | DE3218889A1 (fr) |
| ZA (1) | ZA833571B (fr) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4772290A (en) * | 1986-03-10 | 1988-09-20 | Clorox Company | Liquid hydrogen peroxide/peracid precursor bleach: acidic aqueous medium containing solid peracid precursor activator |
| US5522580A (en) * | 1988-06-14 | 1996-06-04 | Basf Corporation | Removing stains from fixed items |
| US5389278A (en) * | 1988-06-14 | 1995-02-14 | Basf Corporation | Method for removing coffee stains from carpet |
| ES2084783T3 (es) * | 1990-11-02 | 1996-05-16 | Clorox Co | Detergente liquido no acuoso con peracido solubilizado estable. |
| EP0584710A3 (fr) * | 1992-08-22 | 1995-02-01 | Hoechst Ag | Procédé de blanchiment de textiles. |
| HUP9800073A2 (hu) * | 1995-02-28 | 1998-04-28 | The Procter And Gamble Co. | Szöveteket kevésbé károsító mosodai előkezelési eljárás vas, réz vagy mangán részére kelátképzőket tartalmazó fehérítőkkel |
| US6740126B2 (en) | 2000-02-15 | 2004-05-25 | Strike Investments, Llc | Method for the application of durable press finishes to textile components via the use of hydrophobic bleaching preparation |
| US6830591B1 (en) | 2000-02-15 | 2004-12-14 | The Procter & Gamble Company | Method for the use of hydrophobic bleaching systems in textile preparation |
| JP2003525361A (ja) | 2000-02-15 | 2003-08-26 | ザ、プロクター、エンド、ギャンブル、カンパニー | 繊維製品の一段階調製方法 |
| US6569209B2 (en) * | 2001-02-27 | 2003-05-27 | The Procter & Gamble Company | Method for the use of hydrophobic bleaching systems in cold batch textile preparation |
| US6573301B1 (en) * | 2002-04-23 | 2003-06-03 | Bradley Pharmaceuticals, Inc. | Carbamide peroxide compositions for the treatment of dermatological disorders and methods for their use |
| WO2018205076A1 (fr) * | 2017-05-08 | 2018-11-15 | 沈亚阳 | Procédé de teinture et de finition |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL252798A (fr) * | 1959-06-19 | 1900-01-01 | ||
| US3637339A (en) * | 1968-03-07 | 1972-01-25 | Frederick William Gray | Stain removal |
| DE2038485A1 (de) * | 1970-08-03 | 1972-02-10 | Mazurek Hasso | Bleichloesungen |
| DE2047289B2 (de) * | 1970-09-25 | 1974-07-25 | Basf Ag, 6700 Ludwigshafen | Wäßrige Bleichflotte |
| US3829291A (en) * | 1971-05-07 | 1974-08-13 | Shell Oil Co | Process of removing polyvinyl alcohol size from fabrics with hydrogen peroxide |
| US3682583A (en) * | 1971-05-12 | 1972-08-08 | Shell Oil Co | Process of removing polyvinyl alcohol containing size |
| US4116878A (en) * | 1974-06-14 | 1978-09-26 | Lever Brothers Company | Detergent composition |
| GB1502560A (en) * | 1976-06-25 | 1978-03-01 | Datlow B | Composition for addition to textile bleaching baths |
| PL104134B1 (pl) * | 1976-11-27 | 1979-07-31 | Inst Ciezkiej Syntezy Orga | Srodek do odklejania tkanin |
-
1982
- 1982-05-19 DE DE3218889A patent/DE3218889A1/de not_active Withdrawn
-
1983
- 1983-05-09 US US06/492,821 patent/US4539007A/en not_active Expired - Fee Related
- 1983-05-14 DE DE8383104775T patent/DE3365270D1/de not_active Expired
- 1983-05-14 EP EP83104775A patent/EP0094656B1/fr not_active Expired
- 1983-05-17 KR KR1019830002162A patent/KR840004797A/ko not_active Withdrawn
- 1983-05-18 JP JP58085975A patent/JPS58208463A/ja active Pending
- 1983-05-18 ZA ZA833571A patent/ZA833571B/xx unknown
- 1983-05-18 CA CA000428438A patent/CA1202919A/fr not_active Expired
- 1983-05-18 BR BR8302622A patent/BR8302622A/pt unknown
Also Published As
| Publication number | Publication date |
|---|---|
| ZA833571B (en) | 1984-01-25 |
| US4539007A (en) | 1985-09-03 |
| KR840004797A (ko) | 1984-10-24 |
| EP0094656A2 (fr) | 1983-11-23 |
| EP0094656A3 (en) | 1984-04-04 |
| CA1202919A (fr) | 1986-04-08 |
| DE3365270D1 (en) | 1986-09-18 |
| BR8302622A (pt) | 1984-01-17 |
| JPS58208463A (ja) | 1983-12-05 |
| DE3218889A1 (de) | 1983-11-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Designated state(s): AT BE CH DE FR GB IT LI NL |
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