FI77385B - Foerbaettrad faergaemneskomposition. - Google Patents
Foerbaettrad faergaemneskomposition. Download PDFInfo
- Publication number
- FI77385B FI77385B FI851275A FI851275A FI77385B FI 77385 B FI77385 B FI 77385B FI 851275 A FI851275 A FI 851275A FI 851275 A FI851275 A FI 851275A FI 77385 B FI77385 B FI 77385B
- Authority
- FI
- Finland
- Prior art keywords
- lignin
- dye composition
- composition according
- sulfite
- sulfonated
- Prior art date
Links
- 229920005610 lignin Polymers 0.000 claims description 83
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical group O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 43
- 229920001732 Lignosulfonate Polymers 0.000 claims description 39
- 235000019357 lignosulphonate Nutrition 0.000 claims description 39
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical group [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 37
- 239000000203 mixture Substances 0.000 claims description 24
- 239000002270 dispersing agent Substances 0.000 claims description 22
- 235000010265 sodium sulphite Nutrition 0.000 claims description 18
- 239000002002 slurry Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 10
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 239000003086 colorant Substances 0.000 claims description 7
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 6
- 239000011541 reaction mixture Substances 0.000 claims description 6
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 claims description 3
- 239000006185 dispersion Substances 0.000 claims description 2
- WQDSRJBTLILEEK-UHFFFAOYSA-N sulfurous acid Chemical compound OS(O)=O.OS(O)=O WQDSRJBTLILEEK-UHFFFAOYSA-N 0.000 claims 1
- 238000005406 washing Methods 0.000 claims 1
- 239000000975 dye Substances 0.000 description 31
- 229940001482 sodium sulfite Drugs 0.000 description 16
- 238000000034 method Methods 0.000 description 14
- 239000000047 product Substances 0.000 description 14
- 235000019256 formaldehyde Nutrition 0.000 description 13
- 239000002253 acid Substances 0.000 description 10
- 230000008569 process Effects 0.000 description 10
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 8
- 230000008901 benefit Effects 0.000 description 6
- 235000010633 broth Nutrition 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 6
- 238000006277 sulfonation reaction Methods 0.000 description 6
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000004043 dyeing Methods 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 229910021653 sulphate ion Inorganic materials 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 239000004117 Lignosulphonate Substances 0.000 description 3
- DETXZQGDWUJKMO-UHFFFAOYSA-N alpha-hydroxymethanesulfonic acid Natural products OCS(O)(=O)=O DETXZQGDWUJKMO-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- DETXZQGDWUJKMO-UHFFFAOYSA-M hydroxymethanesulfonate Chemical compound OCS([O-])(=O)=O DETXZQGDWUJKMO-UHFFFAOYSA-M 0.000 description 3
- 230000020477 pH reduction Effects 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 159000000000 sodium salts Chemical class 0.000 description 3
- 239000002023 wood Substances 0.000 description 3
- 229920001131 Pulp (paper) Polymers 0.000 description 2
- 229960000583 acetic acid Drugs 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 241000609240 Ambelania acida Species 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 239000003929 acidic solution Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 229940101006 anhydrous sodium sulfite Drugs 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 239000010905 bagasse Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000006326 desulfonation Effects 0.000 description 1
- 238000005869 desulfonation reaction Methods 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000012362 glacial acetic acid Substances 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000010903 husk Substances 0.000 description 1
- 239000012978 lignocellulosic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- PSZYNBSKGUBXEH-UHFFFAOYSA-N naphthalene-1-sulfonic acid Chemical class C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- CSMWJXBSXGUPGY-UHFFFAOYSA-L sodium dithionate Chemical compound [Na+].[Na+].[O-]S(=O)(=O)S([O-])(=O)=O CSMWJXBSXGUPGY-UHFFFAOYSA-L 0.000 description 1
- 229940075931 sodium dithionate Drugs 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000000984 vat dye Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
- C09B67/0071—Process features in the making of dyestuff preparations; Dehydrating agents; Dispersing agents; Dustfree compositions
- C09B67/0083—Solutions of dyes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
- C09B67/0071—Process features in the making of dyestuff preparations; Dehydrating agents; Dispersing agents; Dustfree compositions
- C09B67/0084—Dispersions of dyes
- C09B67/0085—Non common dispersing agents
- C09B67/0086—Non common dispersing agents anionic dispersing agents
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K23/00—Use of substances as emulsifying, wetting, dispersing, or foam-producing agents
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K23/00—Use of substances as emulsifying, wetting, dispersing, or foam-producing agents
- C09K23/50—Derivatives of lignin
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Dispersion Chemistry (AREA)
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
- Compounds Of Unknown Constitution (AREA)
- Coloring (AREA)
Claims (10)
1. Förbättrad färgämneskomposition, som omfattar färgämneskaka, där färgämnet är ett dispersionsfärgämne 5 eller ett kypfärgämne, och ett dispergeringsmedel, som omfattar ett sulfonerat lignin, som framställts genom om-sättning av ligninmaterial, en aldehyd och ett sulfit med varandra, varvid sulfitet är ett vattenlösligt sulfit eller ett bisulfit, kännetecknad därav, att det sullo fonerade ligninet framställts genom a) selektiv isolering av ligninmaterialet frän basiskt svartlut genom sänkande av svartlutets pH s& att ligninerna med en molekylvikt av 5000 eller mindre förblir tili vä-sentlig del lösta i svartlutet, 15 b) surgörande av ligninmaterialet tili ett pH-värde av ca 1,5 - ca 5,0 genom tvättning med svavelsyra och efterföl-jande tillsättning av vatten tili ligninmaterialet sä att ett slam med en fastämneshalt av ca 25 % bildas, c) tillsättning av ett sulfit och en aldehyd tili lignin- 20 slammet vid ett molförhällande sulfit tili aldehyd av ca 1,1:0,1 -ca 2,5:1,0, vilken tillsättning förursakar ett ursprungligt reaktions-pH av ca 8,0 - ca 9,2 och d) höjning av reaktionsblandningens temperatur frän omgiv-ningens temperatur tili ca 130 - ca 175°C för ca 0,5 - 25 ca 12 timmar.
2. Färgämneskomposition enligt patentkravet 1, kännetecknad därav, att ligninmaterialet isole-ras frän svartlutet inom ett pH-omräde av ca 9,7 - ca 11,0.
3. Färgämneskomposition enligt patentkravet 2, 30 kännetecknad därav, att pH-omrädet är ca 10,0 -ca 11,0.
4. Färgämneskomposition enligt patentkravet 1, kännetecknad därav, att det vattenlösliga sul- : fitet är natriumsulfit och aldehyden är formaldehyd. 35
5. Färgämneskomposition enligt patentkravet 4, kännetecknad därav, att molförhällandet natriumsulf it till formaldehyd är ca 1,3:0,8.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/601,049 US4551151A (en) | 1984-04-16 | 1984-04-16 | Dyestuff composition: disperse or vat dye and lignin sulphonate |
US60104984 | 1984-04-16 |
Publications (4)
Publication Number | Publication Date |
---|---|
FI851275A0 FI851275A0 (fi) | 1985-03-29 |
FI851275L FI851275L (fi) | 1985-10-17 |
FI77385B true FI77385B (fi) | 1988-11-30 |
FI77385C FI77385C (sv) | 1989-03-10 |
Family
ID=24406037
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI851275A FI77385C (sv) | 1984-04-16 | 1985-03-29 | Förbättrad färgämneskomposition. |
Country Status (8)
Country | Link |
---|---|
US (1) | US4551151A (sv) |
JP (1) | JPS60252661A (sv) |
BR (1) | BR8501231A (sv) |
CH (1) | CH664370A5 (sv) |
DE (1) | DE3511627A1 (sv) |
FI (1) | FI77385C (sv) |
GB (1) | GB2157719B (sv) |
SE (1) | SE501611C2 (sv) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4590262A (en) * | 1984-10-05 | 1986-05-20 | Westvaco Corporation | Low electrolyte sodium lignosulfonates |
US4670482A (en) * | 1984-12-10 | 1987-06-02 | Westvaco Corporation | Ammonium lignosulfonates |
US4642336A (en) * | 1984-12-10 | 1987-02-10 | Westvaco Corporation | Ammonium lignosulfonates |
US4636224A (en) * | 1984-12-10 | 1987-01-13 | Westvaco Corporation | Ammonium lignosulfonates |
US4721778A (en) * | 1984-12-10 | 1988-01-26 | Westvaco Corporation | Ammonium lignosulfonates |
US4629469A (en) * | 1985-10-11 | 1986-12-16 | Westvaco Corporation | Humectant composition derived from kraft black liquor |
US4892588A (en) * | 1988-10-24 | 1990-01-09 | Westvaco Corporation | Production of lignosulfonate additives |
US5980589A (en) * | 1996-09-12 | 1999-11-09 | Westvaco Corporation | High activity sulfonated lignin dye dispersants |
NO974058L (no) * | 1996-09-12 | 1998-03-13 | Westvaco Corp | Fargestoff og framgangsmåte for framstilling av samme |
CN1077453C (zh) * | 1998-12-25 | 2002-01-09 | 华南理工大学 | 碱木素羟甲基化多相反应催化剂及其制备方法 |
KR100385580B1 (ko) * | 2000-03-14 | 2003-05-27 | 조성웅 | 펄프 제조시 발생된 흑액을 이용한 염료, 시멘트 및레미콘용 분산제 제조와 사용방법 |
CA2839864C (en) * | 2011-06-22 | 2018-06-12 | Metso Power Ab | Method for lignin separation from black liquor comprising multiple acidification steps |
CN102627673A (zh) * | 2012-03-23 | 2012-08-08 | 辽宁岩砂晶建材有限公司 | 木质素降解磺甲基化的方法 |
FI127010B (sv) | 2012-08-24 | 2017-09-29 | Upm Kymmene Corp | Förfarande för återvinning av lignin med låg molekylvikt från ett filtrat |
CN102923990A (zh) * | 2012-10-19 | 2013-02-13 | 黄宝民 | 木质素聚磺酸高效减水剂制备方法 |
CN103910890A (zh) * | 2014-03-31 | 2014-07-09 | 济南圣泉集团股份有限公司 | 一种制备木质素磺酸钠的方法及木质素磺酸钠作为染料分散剂的应用 |
CN104163925B (zh) * | 2014-07-09 | 2016-10-05 | 华南理工大学 | 一种羧酸化碱木质素磺酸盐染料分散剂及其制备方法 |
CN108138440B (zh) | 2015-07-07 | 2023-07-07 | 索理思科技公司 | 用于抑制有机污染物沉积在纸浆和造纸系统中的方法 |
JP2019189776A (ja) * | 2018-04-26 | 2019-10-31 | 日本製紙株式会社 | 染料分散剤 |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2680113A (en) * | 1949-12-22 | 1954-06-01 | Svenska Cellulosaforeningens C | Method of producing water-soluble products from black liquor lignin |
US2789974A (en) * | 1954-09-28 | 1957-04-23 | Svenska Cellulosaforeningens C | Process for producing tanning agents from black liquor lignin |
US2997466A (en) * | 1958-11-04 | 1961-08-22 | West Virginia Pulp & Paper Co | Decantation of lignin |
US3216839A (en) * | 1960-03-22 | 1965-11-09 | West Virginia Pulp & Paper Co | Free lignin solutions and method of making and using same |
US3094515A (en) * | 1961-11-06 | 1963-06-18 | Lignosol Chemicals Ltd | Lignin dispersing agents and a method of making the same |
US3156520A (en) * | 1963-04-01 | 1964-11-10 | American Can Co | Dyestuffs and alkali metal salts of wood sugar acids and lignin sulfonates |
US3546197A (en) * | 1969-01-23 | 1970-12-08 | Dryden Chem Ltd | Lignin sulphonate dispersing agents and methods of making the same |
US3726850A (en) * | 1971-07-29 | 1973-04-10 | American Can Co | Lignin dispersing agent |
US3769272A (en) * | 1972-05-25 | 1973-10-30 | Westvaco Corp | Lignin adduct |
US4007004A (en) * | 1974-07-05 | 1977-02-08 | Westvaco Corporation | Dyestuff filler derived from kraft black liquor |
US4184845A (en) * | 1975-04-18 | 1980-01-22 | Westvaco Corporation | Process for reduction of lignin color |
US4001202A (en) * | 1975-10-17 | 1977-01-04 | Westvaco Corporation | Process for making sulfonated lignin surfactants |
US4131564A (en) * | 1976-08-23 | 1978-12-26 | Westvaco Corporation | Lignin-containing dye dispersing composition |
US4338091A (en) * | 1981-08-13 | 1982-07-06 | Westvaco Corporation | Process for lowering the viscosity of sulfonated lignins |
US4521336A (en) * | 1984-04-16 | 1985-06-04 | Westvaco Corporation | Process for preparing lignosulfonates |
-
1984
- 1984-04-16 US US06/601,049 patent/US4551151A/en not_active Expired - Lifetime
-
1985
- 1985-03-04 SE SE8501034A patent/SE501611C2/sv unknown
- 1985-03-20 BR BR8501231A patent/BR8501231A/pt unknown
- 1985-03-29 DE DE19853511627 patent/DE3511627A1/de active Granted
- 1985-03-29 FI FI851275A patent/FI77385C/sv not_active IP Right Cessation
- 1985-04-04 JP JP60071856A patent/JPS60252661A/ja active Granted
- 1985-04-15 CH CH1605/85A patent/CH664370A5/de not_active IP Right Cessation
- 1985-04-16 GB GB08509743A patent/GB2157719B/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
BR8501231A (pt) | 1986-04-22 |
JPH0254866B2 (sv) | 1990-11-22 |
GB2157719A (en) | 1985-10-30 |
DE3511627C2 (sv) | 1987-10-22 |
US4551151A (en) | 1985-11-05 |
FI851275A0 (fi) | 1985-03-29 |
FI851275L (fi) | 1985-10-17 |
GB2157719B (en) | 1987-11-25 |
SE501611C2 (sv) | 1995-03-27 |
GB8509743D0 (en) | 1985-05-22 |
SE8501034L (sv) | 1985-10-17 |
CH664370A5 (de) | 1988-02-29 |
FI77385C (sv) | 1989-03-10 |
SE8501034D0 (sv) | 1985-03-04 |
DE3511627A1 (de) | 1985-10-17 |
JPS60252661A (ja) | 1985-12-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM | Patent lapsed | ||
MM | Patent lapsed |
Owner name: WESTVACO CORPORATION |