DE2627708A1 - Faeden und fasern aus vernetzten wasserunloeslichen acrylsaeurepolymerisaten, deren herstellung und verwendung - Google Patents
Faeden und fasern aus vernetzten wasserunloeslichen acrylsaeurepolymerisaten, deren herstellung und verwendungInfo
- Publication number
- DE2627708A1 DE2627708A1 DE19762627708 DE2627708A DE2627708A1 DE 2627708 A1 DE2627708 A1 DE 2627708A1 DE 19762627708 DE19762627708 DE 19762627708 DE 2627708 A DE2627708 A DE 2627708A DE 2627708 A1 DE2627708 A1 DE 2627708A1
- Authority
- DE
- Germany
- Prior art keywords
- fibers
- acrylic acid
- water
- acid polymers
- crosslinked
- 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.)
- Withdrawn
Links
- 239000000835 fiber Substances 0.000 title claims description 59
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- NIXOWILDQLNWCW-UHFFFAOYSA-N Acrylic acid Chemical compound OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 title description 7
- 229920002125 Sokalan® Polymers 0.000 claims description 35
- 239000007864 aqueous solution Substances 0.000 claims description 17
- -1 ammonium ions Chemical class 0.000 claims description 11
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 10
- 150000001875 compounds Chemical class 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 7
- 125000001931 aliphatic group Chemical group 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 229920005862 polyol Polymers 0.000 claims description 6
- 150000003077 polyols Chemical class 0.000 claims description 6
- 239000004753 textile Substances 0.000 claims description 6
- 125000004432 carbon atom Chemical group C* 0.000 claims description 5
- 230000002209 hydrophobic effect Effects 0.000 claims description 5
- 125000000467 secondary amino group Chemical group [H]N([*:1])[*:2] 0.000 claims description 4
- 150000001491 aromatic compounds Chemical class 0.000 claims description 3
- 239000003431 cross linking reagent Substances 0.000 claims description 3
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims description 2
- 239000003513 alkali Substances 0.000 claims 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims 1
- 150000003839 salts Chemical class 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 23
- 239000000243 solution Substances 0.000 description 19
- 239000004584 polyacrylic acid Substances 0.000 description 18
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 13
- 229920000139 polyethylene terephthalate Polymers 0.000 description 11
- 239000005020 polyethylene terephthalate Substances 0.000 description 11
- 238000009987 spinning Methods 0.000 description 11
- 229920000742 Cotton Polymers 0.000 description 10
- 229920000642 polymer Polymers 0.000 description 10
- 238000010521 absorption reaction Methods 0.000 description 8
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 8
- 230000007935 neutral effect Effects 0.000 description 7
- 229920002994 synthetic fiber Polymers 0.000 description 7
- 239000012209 synthetic fiber Substances 0.000 description 7
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 6
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 5
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 5
- 239000004952 Polyamide Substances 0.000 description 5
- 230000002378 acidificating effect Effects 0.000 description 5
- 238000004132 cross linking Methods 0.000 description 5
- 229920002647 polyamide Polymers 0.000 description 5
- 210000002268 wool Anatomy 0.000 description 5
- 229920001577 copolymer Polymers 0.000 description 4
- 239000000178 monomer Substances 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 125000003277 amino group Chemical group 0.000 description 3
- 230000003750 conditioning effect Effects 0.000 description 3
- 239000000284 extract Substances 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 229920002239 polyacrylonitrile Polymers 0.000 description 3
- 229920000768 polyamine Polymers 0.000 description 3
- 239000004971 Cross linker Substances 0.000 description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 2
- 150000001412 amines Chemical group 0.000 description 2
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 2
- 230000001143 conditioned effect Effects 0.000 description 2
- 239000002657 fibrous material Substances 0.000 description 2
- 230000003301 hydrolyzing effect Effects 0.000 description 2
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 238000011085 pressure filtration Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XFNJVJPLKCPIBV-UHFFFAOYSA-N trimethylenediamine Chemical compound NCCCN XFNJVJPLKCPIBV-UHFFFAOYSA-N 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
- PTBDIHRZYDMNKB-UHFFFAOYSA-N 2,2-Bis(hydroxymethyl)propionic acid Chemical compound OCC(C)(CO)C(O)=O PTBDIHRZYDMNKB-UHFFFAOYSA-N 0.000 description 1
- UCAGGGXNNMODQS-UHFFFAOYSA-N 2-methyl-2-phenylpropane-1,1-diol Chemical compound OC(O)C(C)(C)C1=CC=CC=C1 UCAGGGXNNMODQS-UHFFFAOYSA-N 0.000 description 1
- QZPSOSOOLFHYRR-UHFFFAOYSA-N 3-hydroxypropyl prop-2-enoate Chemical compound OCCCOC(=O)C=C QZPSOSOOLFHYRR-UHFFFAOYSA-N 0.000 description 1
- BDBZTOMUANOKRT-UHFFFAOYSA-N 4-[2-(4-aminocyclohexyl)propan-2-yl]cyclohexan-1-amine Chemical compound C1CC(N)CCC1C(C)(C)C1CCC(N)CC1 BDBZTOMUANOKRT-UHFFFAOYSA-N 0.000 description 1
- WUBBRNOQWQTFEX-UHFFFAOYSA-N 4-aminosalicylic acid Chemical compound NC1=CC=C(C(O)=O)C(O)=C1 WUBBRNOQWQTFEX-UHFFFAOYSA-N 0.000 description 1
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- MCTQNEBFZMBRSQ-GEEYTBSJSA-N Chrysoidine Chemical compound Cl.NC1=CC(N)=CC=C1\N=N\C1=CC=CC=C1 MCTQNEBFZMBRSQ-GEEYTBSJSA-N 0.000 description 1
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 description 1
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 1
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 1
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- JLTDJTHDQAWBAV-UHFFFAOYSA-N N,N-dimethylaniline Chemical compound CN(C)C1=CC=CC=C1 JLTDJTHDQAWBAV-UHFFFAOYSA-N 0.000 description 1
- WHNWPMSKXPGLAX-UHFFFAOYSA-N N-Vinyl-2-pyrrolidone Chemical compound C=CN1CCCC1=O WHNWPMSKXPGLAX-UHFFFAOYSA-N 0.000 description 1
- 229920002292 Nylon 6 Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 150000008065 acid anhydrides Chemical group 0.000 description 1
- 125000005396 acrylic acid ester group Chemical group 0.000 description 1
- 150000007824 aliphatic compounds Chemical class 0.000 description 1
- 150000008044 alkali metal hydroxides Chemical class 0.000 description 1
- 229920005603 alternating copolymer Polymers 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003729 cation exchange resin Substances 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229920006037 cross link polymer Polymers 0.000 description 1
- YMHQVDAATAEZLO-UHFFFAOYSA-N cyclohexane-1,1-diamine Chemical compound NC1(N)CCCCC1 YMHQVDAATAEZLO-UHFFFAOYSA-N 0.000 description 1
- 150000002009 diols Chemical class 0.000 description 1
- 238000000578 dry spinning Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 125000004185 ester group Chemical group 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 125000001033 ether group Chemical group 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- PYGSKMBEVAICCR-UHFFFAOYSA-N hexa-1,5-diene Chemical group C=CCCC=C PYGSKMBEVAICCR-UHFFFAOYSA-N 0.000 description 1
- 239000012456 homogeneous solution Substances 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- FQPSGWSUVKBHSU-UHFFFAOYSA-N methacrylamide Chemical compound CC(=C)C(N)=O FQPSGWSUVKBHSU-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- QLNNMIUPRPKARZ-UHFFFAOYSA-N n'-cyclopentylmethanediamine Chemical compound NCNC1CCCC1 QLNNMIUPRPKARZ-UHFFFAOYSA-N 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 238000003918 potentiometric titration Methods 0.000 description 1
- AOHJOMMDDJHIJH-UHFFFAOYSA-N propylenediamine Chemical compound CC(N)CN AOHJOMMDDJHIJH-UHFFFAOYSA-N 0.000 description 1
- 239000004627 regenerated cellulose Substances 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 239000011492 sheep wool Substances 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
- 230000004584 weight gain Effects 0.000 description 1
- 235000019786 weight gain Nutrition 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/28—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F6/36—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds comprising unsaturated carboxylic acids or unsaturated organic esters as the major constituent
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F6/16—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polymers of unsaturated carboxylic acids or unsaturated organic esters, e.g. polyacrylic esters, polyvinyl acetate
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Artificial Filaments (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19762627708 DE2627708A1 (de) | 1976-06-21 | 1976-06-21 | Faeden und fasern aus vernetzten wasserunloeslichen acrylsaeurepolymerisaten, deren herstellung und verwendung |
| IT2334377A IT1085075B (it) | 1976-06-21 | 1977-05-09 | Fili e fibre di polimeri dell'acido acrilico idroinsolubili reticolati,loro preparazione e loro uso |
| BE178605A BE855905A (fr) | 1976-06-21 | 1977-06-21 | Fils et fibres en polymeres de l'acide acrylique reticules, insolubles dans l'eau, leur fabrication et lerus applications |
| FR7719027A FR2355929A1 (fr) | 1976-06-21 | 1977-06-21 | Fils et fibres en polymeres de l'acide acrylique reticules, insolubles dans l'eau, leur fabrication et leurs applications |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19762627708 DE2627708A1 (de) | 1976-06-21 | 1976-06-21 | Faeden und fasern aus vernetzten wasserunloeslichen acrylsaeurepolymerisaten, deren herstellung und verwendung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2627708A1 true DE2627708A1 (de) | 1977-12-29 |
Family
ID=5981034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19762627708 Withdrawn DE2627708A1 (de) | 1976-06-21 | 1976-06-21 | Faeden und fasern aus vernetzten wasserunloeslichen acrylsaeurepolymerisaten, deren herstellung und verwendung |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE855905A (OSRAM) |
| DE (1) | DE2627708A1 (OSRAM) |
| FR (1) | FR2355929A1 (OSRAM) |
| IT (1) | IT1085075B (OSRAM) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4307152A (en) | 1977-12-12 | 1981-12-22 | Akzona Incorporated | Hydrophilic polyester fiber and process for making same |
| US5026784A (en) * | 1990-01-04 | 1991-06-25 | Arco Chemical Technology, Inc. | Polymer compositions and absorbent fibers produced therefrom |
| US5079306A (en) * | 1990-01-04 | 1992-01-07 | Arco Chemical Technology, Inc. | Polymer compositions and absorbent fibers produced therefrom |
| US5151465A (en) * | 1990-01-04 | 1992-09-29 | Arco Chemical Technology, L.P. | Polymer compositions and absorbent fibers produced therefrom |
| US6565878B2 (en) | 1997-07-02 | 2003-05-20 | Coloplast A/S | Method for preparing a non-fibrous porous material |
| WO2025237554A1 (en) | 2024-05-13 | 2025-11-20 | Technical Absorbents Ltd | Geosynthetic liner |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2521176A1 (fr) * | 1982-02-05 | 1983-08-12 | Sheldon Maurice Atlas | Tissu de bonneterie antistatique, resistant a l'abrasion et confortable |
| AU1338883A (en) * | 1982-02-05 | 1983-08-25 | Sheldon M. Atlas | Antistatic fabrics incorporating specialty textile fibers having high moisture regain and articles produced therefrom |
| GB8910788D0 (en) * | 1989-05-10 | 1989-06-28 | Allied Colloids Ltd | Absorbent products and their manufacture |
| US5280079A (en) * | 1986-11-20 | 1994-01-18 | Allied Colloids Limited | Absorbent products and their manufacture |
| ES2044954T3 (es) * | 1986-11-20 | 1994-01-16 | Allied Colloids Ltd | Productos absorbentes y su fabricacion. |
| GB8811955D0 (en) * | 1988-05-20 | 1988-06-22 | Allied Colloids Ltd | Absorbent products & their manufacture |
| GB2269602A (en) * | 1992-08-13 | 1994-02-16 | Courtaulds Plc | Absorbent nonwoven fabric |
| GB2270030B (en) * | 1992-08-19 | 1996-06-19 | Courtaulds Plc | Method of producing fibre or film |
| US6565981B1 (en) | 1999-03-30 | 2003-05-20 | Stockhausen Gmbh & Co. Kg | Polymers that are cross-linkable to form superabsorbent polymers |
-
1976
- 1976-06-21 DE DE19762627708 patent/DE2627708A1/de not_active Withdrawn
-
1977
- 1977-05-09 IT IT2334377A patent/IT1085075B/it active
- 1977-06-21 BE BE178605A patent/BE855905A/xx not_active IP Right Cessation
- 1977-06-21 FR FR7719027A patent/FR2355929A1/fr active Granted
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4307152A (en) | 1977-12-12 | 1981-12-22 | Akzona Incorporated | Hydrophilic polyester fiber and process for making same |
| US5026784A (en) * | 1990-01-04 | 1991-06-25 | Arco Chemical Technology, Inc. | Polymer compositions and absorbent fibers produced therefrom |
| US5079306A (en) * | 1990-01-04 | 1992-01-07 | Arco Chemical Technology, Inc. | Polymer compositions and absorbent fibers produced therefrom |
| US5151465A (en) * | 1990-01-04 | 1992-09-29 | Arco Chemical Technology, L.P. | Polymer compositions and absorbent fibers produced therefrom |
| US6565878B2 (en) | 1997-07-02 | 2003-05-20 | Coloplast A/S | Method for preparing a non-fibrous porous material |
| WO2025237554A1 (en) | 2024-05-13 | 2025-11-20 | Technical Absorbents Ltd | Geosynthetic liner |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2355929A1 (fr) | 1978-01-20 |
| FR2355929B3 (OSRAM) | 1980-04-04 |
| IT1085075B (it) | 1985-05-28 |
| BE855905A (fr) | 1977-12-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8141 | Disposal/no request for examination |