ZA979027B - Dispersants. - Google Patents
Dispersants.Info
- Publication number
- ZA979027B ZA979027B ZA9709027A ZA979027A ZA979027B ZA 979027 B ZA979027 B ZA 979027B ZA 9709027 A ZA9709027 A ZA 9709027A ZA 979027 A ZA979027 A ZA 979027A ZA 979027 B ZA979027 B ZA 979027B
- Authority
- ZA
- South Africa
- Prior art keywords
- caprolactone
- valerolactone
- reaction product
- ethyleneimine
- acidic
- Prior art date
Links
- 239000002270 dispersing agent Substances 0.000 title abstract 3
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 abstract 4
- 239000007795 chemical reaction product Substances 0.000 abstract 3
- 239000005639 Lauric acid Substances 0.000 abstract 2
- 229920002873 Polyethylenimine Polymers 0.000 abstract 2
- 230000002378 acidificating effect Effects 0.000 abstract 2
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical compound CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 abstract 2
- -1 poly(ethyleneimine) Polymers 0.000 abstract 2
- 229910019142 PO4 Inorganic materials 0.000 abstract 1
- 125000000217 alkyl group Chemical group 0.000 abstract 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 abstract 1
- 229910052739 hydrogen Inorganic materials 0.000 abstract 1
- 239000001257 hydrogen Substances 0.000 abstract 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 abstract 1
- 125000005702 oxyalkylene group Chemical group 0.000 abstract 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 abstract 1
- 239000010452 phosphate Substances 0.000 abstract 1
- 150000003839 salts Chemical class 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/06—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from hydroxycarboxylic acids
- C08G63/08—Lactones or lactides
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D17/00—Pigment pastes, e.g. for mixing in paints
- C09D17/002—Pigment pastes, e.g. for mixing in paints in organic medium
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/45—Anti-settling 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
- C09K23/04—Sulfonates or sulfuric acid ester salts derived from polyhydric alcohols or amino alcohols or derivatives thereof
-
- 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
- C09K23/14—Derivatives of phosphoric acid
-
- 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
- C09K23/16—Amines or polyamines
-
- 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
- C09K23/18—Quaternary ammonium compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Polymers & Plastics (AREA)
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
- Polyesters Or Polycarbonates (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
- Other Resins Obtained By Reactions Not Involving Carbon-To-Carbon Unsaturated Bonds (AREA)
- Paints Or Removers (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
- Lubricants (AREA)
- Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB9622783.0A GB9622783D0 (en) | 1996-11-01 | 1996-11-01 | Dispersants |
Publications (1)
Publication Number | Publication Date |
---|---|
ZA979027B true ZA979027B (en) | 1998-05-04 |
Family
ID=10802302
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ZA9709027A ZA979027B (en) | 1996-11-01 | 1997-10-08 | Dispersants. |
Country Status (15)
Country | Link |
---|---|
US (2) | USRE44769E1 (es) |
EP (3) | EP1611943A2 (es) |
JP (2) | JP4321829B2 (es) |
KR (1) | KR100482034B1 (es) |
CN (1) | CN1106876C (es) |
AT (1) | ATE320305T1 (es) |
AU (1) | AU4563397A (es) |
CA (1) | CA2268117C (es) |
DE (1) | DE69735499T3 (es) |
ES (1) | ES2258283T7 (es) |
GB (1) | GB9622783D0 (es) |
MY (1) | MY124144A (es) |
TW (1) | TW460317B (es) |
WO (1) | WO1998019784A1 (es) |
ZA (1) | ZA979027B (es) |
Families Citing this family (49)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9806723D0 (en) * | 1998-03-28 | 1998-05-27 | Zeneca Ltd | Dispersants |
GB9809025D0 (en) * | 1998-04-28 | 1998-06-24 | Zeneca Ltd | Amine dispersants |
EP2306605B1 (en) * | 1998-07-23 | 2012-05-23 | The Furukawa Electric Co., Ltd. | Pumping unit for a Raman amplifier and Raman amplifier comprising the same |
WO2000024503A1 (en) * | 1998-10-24 | 2000-05-04 | Avecia Limited | Dispersants, compositions and use |
GB9922039D0 (en) * | 1999-09-18 | 1999-11-17 | Avecia Ltd | Polyester dispersants |
GB0009798D0 (en) * | 2000-04-20 | 2000-06-07 | Avecia Ltd | Dispersants |
US7812079B2 (en) | 2001-02-22 | 2010-10-12 | Valspar Sourcing, Inc. | Coating compositions containing low VOC compounds |
US6762230B2 (en) * | 2001-02-22 | 2004-07-13 | Valspar Sourcing, Inc. | Coating compositions containing low VOC compounds |
GB0107183D0 (en) * | 2001-03-22 | 2001-05-09 | Avecia Ltd | Paint compositions |
GB0109708D0 (en) * | 2001-04-20 | 2001-06-13 | Avecia Ltd | Dispersants |
GB0204638D0 (en) * | 2002-02-28 | 2002-04-10 | Avecia Ltd | Phosphate dispersants |
WO2004039865A1 (en) * | 2002-10-29 | 2004-05-13 | Akzo Nobel N.V. | Polyamine derivatives, a process to make them, and their use |
KR101067082B1 (ko) | 2003-07-18 | 2011-09-22 | 더루브리졸코오퍼레이션 | 조성물 |
GB0316857D0 (en) * | 2003-07-18 | 2003-08-20 | Avecia Ltd | Compositions |
JP2005179485A (ja) * | 2003-12-18 | 2005-07-07 | Daicel Chem Ind Ltd | ラクトン系ポリエステルモノオール、ラクトン系ポリエステルモノカルボン酸及びそれらの製造方法 |
WO2006068813A1 (en) * | 2004-12-21 | 2006-06-29 | Noveon, Inc. | Compositions |
EP2093254B1 (en) * | 2004-12-21 | 2011-08-24 | Lubrizol Limited | Compositions |
WO2006071460A2 (en) * | 2004-12-23 | 2006-07-06 | Noveon, Inc. | Dispersants |
WO2006113258A2 (en) * | 2005-04-13 | 2006-10-26 | Lubrizol Advanced Materials, Inc. | Dispersants |
WO2006124264A1 (en) * | 2005-05-12 | 2006-11-23 | Lubrizol Limited | Dispersants and compositions thereof |
US7803743B2 (en) * | 2005-06-06 | 2010-09-28 | Baker Hughes Incorporated | Invert emulsion carrier fluid and oil-wetting agent and method of using same |
CN101516491B (zh) * | 2006-09-27 | 2012-08-08 | 西巴控股有限公司 | 聚亚乙基亚胺型树枝状分散剂 |
EP1911816B1 (en) * | 2006-10-11 | 2010-07-07 | Agfa Graphics N.V. | Non-aqueous pigmented inkjet inks |
ATE440126T1 (de) * | 2006-10-11 | 2009-09-15 | Agfa Graphics Nv | Nicht wässrige pigmentierte tintenstrahldruckfarben |
DE602006008629D1 (de) | 2006-10-11 | 2009-10-01 | Agfa Graphics Nv | Nichtwässrige, pigmentierte Tintenstrahldruckfarbe |
US8344074B2 (en) * | 2007-03-05 | 2013-01-01 | Basf Se | Polyamine-polyacrylate dispersant |
TW200904517A (en) | 2007-03-28 | 2009-02-01 | Lubrizol Ltd | Dispersant composition |
TW200904518A (en) * | 2007-03-28 | 2009-02-01 | Lubrizol Ltd | Dispersant composition |
JP2009138151A (ja) * | 2007-12-10 | 2009-06-25 | Konica Minolta Business Technologies Inc | 着色粉体およびその製造方法 |
BRPI0918664A2 (pt) * | 2008-09-18 | 2015-12-01 | Lubrizol Advanced Mat Inc | composição, produto, processo para preparar o composto, e, uso do composto |
ES2528729T3 (es) | 2009-03-04 | 2015-02-12 | Lubrizol Advanced Materials, Inc. | Composición dispersante |
CN103170618A (zh) * | 2009-09-30 | 2013-06-26 | 大日本印刷株式会社 | 金属微粒分散体、导电性基板的制造方法及导电性基板 |
IT1403173B1 (it) | 2010-12-09 | 2013-10-04 | Lamberti Spa | Inchiostri per stampanti inkjet |
IT1404805B1 (it) | 2011-02-10 | 2013-11-29 | Lamberti Spa | Disperdenti |
ITVA20110006A1 (it) | 2011-03-03 | 2012-09-04 | Lamberti Spa | Inchiostri ceramici per stampanti inkjet |
ITVA20130019A1 (it) | 2013-03-20 | 2014-09-21 | Lamberti Spa | Inchiostri per stampanti inkjet |
TWI643884B (zh) | 2013-09-06 | 2018-12-11 | 盧伯利索先進材料有限公司 | 多元酸多元鹼接枝共聚物分散劑 |
DE102014205680A1 (de) | 2014-03-26 | 2015-10-01 | Evonik Degussa Gmbh | Dispergierharze |
US10377903B2 (en) * | 2014-06-30 | 2019-08-13 | Sekisui Plastics Co., Ltd. | Nanoparticle-containing solution and use thereof |
KR102400084B1 (ko) | 2014-12-09 | 2022-05-18 | 루브리졸 어드밴스드 머티어리얼스, 인코포레이티드 | 불포화 열경화성 폴리에스테르 조성물 중 저프로파일 첨가제의 상 분리를 방지하기 위한 첨가제 |
JP7019607B2 (ja) | 2016-02-16 | 2022-02-15 | ビーエーエスエフ ソシエタス・ヨーロピア | ポリエステル基を有するポリアルキレンイミン系ポリマー |
DK3222650T3 (da) * | 2016-03-24 | 2024-09-09 | Evonik Operations Gmbh | Dispergeringsmiddel |
WO2019060278A1 (en) | 2017-09-19 | 2019-03-28 | Lubrizol Advanced Materials, Inc. | POLYESTER DISPERSANT COMPRISING SEVERAL AMINES PREPARED THROUGH ANHYDRID INTERMEDIATE |
CN111615529A (zh) | 2018-01-16 | 2020-09-01 | 赢创运营有限公司 | 含纳米颗粒的组合物 |
CN112654419A (zh) * | 2018-09-10 | 2021-04-13 | 路博润先进材料公司 | 多胺聚酯分散剂和制备方法 |
TW202045247A (zh) | 2019-03-14 | 2020-12-16 | 美商盧伯利索先進材料有限公司 | 經由酸酐中間物製得之多胺聚酯分散劑 |
CA3133325A1 (en) | 2019-03-14 | 2020-09-17 | Lubrizol Advanced Materials, Inc. | Multi-amine dispersant made via an anhydride intermediate |
CN116745386A (zh) | 2020-12-18 | 2023-09-12 | 路博润先进材料公司 | 稳定的颜料分散体组合物 |
WO2022132470A1 (en) | 2020-12-18 | 2022-06-23 | Lubrizol Advanced Materials, Inc. | Method of producing a polymer using a pigment dispersion |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3390132A (en) * | 1964-05-27 | 1968-06-25 | Hercules Inc | Polyester resins |
GB1508576A (en) | 1974-09-17 | 1978-04-26 | Ici Ltd | Dispersion of solids in organic solvents |
NZ201300A (en) | 1981-08-11 | 1985-12-13 | Ici Plc | Pigment:fluidising compositions containing disazo compounds |
DE3581430D1 (de) | 1984-03-21 | 1991-02-28 | Ici Plc | Detergens. |
GB8531635D0 (en) | 1985-01-22 | 1986-02-05 | Ici Plc | Composition |
JPS61194091A (ja) | 1985-02-21 | 1986-08-28 | Dainichi Seika Kogyo Kk | リン酸エステル系顔料分散剤 |
GB8819563D0 (en) * | 1988-08-17 | 1988-09-21 | Scott Bader Co | Thickened moulding compositions |
JPH03109419A (ja) * | 1989-09-22 | 1991-05-09 | Japan Atom Energy Res Inst | ラクトンの重合体及び徐放性基剤 |
US5238998A (en) * | 1990-09-24 | 1993-08-24 | Xerox Corporation | Toner and developer compositions with liquid glass resins |
GB9200519D0 (en) | 1992-01-10 | 1992-02-26 | Ici Plc | Composition of matter |
GB9306222D0 (en) | 1993-03-25 | 1993-05-19 | Zeneca Ltd | Dispersants |
US5395743A (en) | 1993-12-22 | 1995-03-07 | Eastman Kodak Company | Photographic element having a transparent magnetic layer and a process of preparing the same |
JPH0810601A (ja) | 1994-06-27 | 1996-01-16 | Daicel Chem Ind Ltd | 顔料分散剤およびラクトン変性アミン化合物の製造方法 |
JP3313897B2 (ja) | 1994-08-01 | 2002-08-12 | ダイセル化学工業株式会社 | 顔料分散剤 |
GB9422093D0 (en) | 1994-11-02 | 1994-12-21 | Zeneca Ltd | Rheology modifier for solvent-based coatings |
JP3534859B2 (ja) | 1994-11-22 | 2004-06-07 | ダイセル化学工業株式会社 | 顔料分散剤、塗料組成物および印刷インキ組成物 |
US6194539B1 (en) | 1994-11-22 | 2001-02-27 | Daicel Chemical Industries, Inc. | Polylactone having amino groups, a process for the preparation thereof, a compound having amino group, a composition for coatings, a composition for printing inks |
-
1996
- 1996-11-01 GB GBGB9622783.0A patent/GB9622783D0/en active Pending
-
1997
- 1997-10-01 JP JP52111598A patent/JP4321829B2/ja not_active Expired - Fee Related
- 1997-10-01 DE DE69735499T patent/DE69735499T3/de not_active Expired - Lifetime
- 1997-10-01 EP EP05076698A patent/EP1611943A2/en not_active Withdrawn
- 1997-10-01 AU AU45633/97A patent/AU4563397A/en not_active Abandoned
- 1997-10-01 US US12/807,339 patent/USRE44769E1/en not_active Expired - Lifetime
- 1997-10-01 WO PCT/GB1997/002698 patent/WO1998019784A1/en active IP Right Grant
- 1997-10-01 KR KR10-1999-7003840A patent/KR100482034B1/ko not_active IP Right Cessation
- 1997-10-01 EP EP05077358A patent/EP1637217A2/en not_active Withdrawn
- 1997-10-01 US US09/297,362 patent/US6197877B1/en not_active Ceased
- 1997-10-01 CN CN97199120A patent/CN1106876C/zh not_active Expired - Lifetime
- 1997-10-01 CA CA002268117A patent/CA2268117C/en not_active Expired - Lifetime
- 1997-10-01 ES ES97943983T patent/ES2258283T7/es active Active
- 1997-10-01 EP EP97943983A patent/EP0958041B3/en not_active Expired - Lifetime
- 1997-10-01 AT AT97943983T patent/ATE320305T1/de not_active IP Right Cessation
- 1997-10-06 MY MYPI97004658A patent/MY124144A/en unknown
- 1997-10-08 ZA ZA9709027A patent/ZA979027B/xx unknown
- 1997-10-08 TW TW086114755A patent/TW460317B/zh not_active IP Right Cessation
-
2009
- 2009-03-13 JP JP2009061051A patent/JP5350844B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CA2268117A1 (en) | 1998-05-14 |
MY124144A (en) | 2006-06-30 |
EP1611943A2 (en) | 2006-01-04 |
EP0958041A1 (en) | 1999-11-24 |
TW460317B (en) | 2001-10-21 |
ATE320305T1 (de) | 2006-04-15 |
KR20000052966A (ko) | 2000-08-25 |
DE69735499D1 (de) | 2006-05-11 |
US6197877B1 (en) | 2001-03-06 |
DE69735499T2 (de) | 2006-11-09 |
EP1637217A2 (en) | 2006-03-22 |
ES2258283T8 (es) | 2013-02-12 |
JP2009172600A (ja) | 2009-08-06 |
JP2001510392A (ja) | 2001-07-31 |
WO1998019784A1 (en) | 1998-05-14 |
EP0958041B1 (en) | 2006-03-15 |
DE69735499T3 (de) | 2012-08-23 |
JP5350844B2 (ja) | 2013-11-27 |
KR100482034B1 (ko) | 2005-04-13 |
CN1106876C (zh) | 2003-04-30 |
EP0958041B3 (en) | 2012-03-07 |
USRE44769E1 (en) | 2014-02-18 |
GB9622783D0 (en) | 1997-01-08 |
CA2268117C (en) | 2007-09-25 |
CN1233974A (zh) | 1999-11-03 |
ES2258283T3 (es) | 2006-08-16 |
ES2258283T7 (es) | 2012-11-19 |
JP4321829B2 (ja) | 2009-08-26 |
AU4563397A (en) | 1998-05-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
ZA979027B (en) | Dispersants. | |
AU587372B2 (en) | Organic amines containing hydroxyalkyl carbamate groups and method of making the same | |
TW223645B (es) | ||
EP0238853A3 (en) | A process for synthesizing phosphonic acid-containing polymers and the polymers thereof | |
MX9705748A (es) | Profarmacos a base de polimero de peso molecular alto. | |
IE890113L (en) | Hydrophilic oxygen permeable polymers | |
KR950702221A (ko) | 폴리와 그의 생산방법(poly(3-hydroxyalk anoates) and process for the production thereof) | |
GR3007074T3 (es) | ||
GR3030178T3 (en) | Polyether phosphates | |
GB1508161A (en) | Polymerisation of lactams | |
EP0270790A3 (en) | Thermoplastic polyetherimide ester polymers exhibiting high flexural modulus | |
EP0448774A3 (en) | Triazinic compounds | |
CA2021014A1 (en) | Silethynyl-siloxane copolymers and method of making them | |
FI882798A (fi) | Tvaerbindbara polymerer. | |
EP0397356A3 (en) | Aromatic polyether | |
AU4370489A (en) | The use of oxidized polyamines, especially nn'-bis-(3- propionaldehyde)-1-4-diaminobutane (sperminedialdehyde) as immunosuppressive agents | |
DE3853944D1 (de) | Modifizierte Polyketone. | |
NZ225763A (en) | Pyrrolo (2,1-a) isoquinoline derivatives | |
JPS5649332A (en) | Preparation of aromatic polyether | |
FI881109A0 (fi) | Foerfarande foer framstaellning av polyklorfosfazen i naervaro av bis(diklorfosforyl)-imid. | |
ZA879478B (en) | Preparation of phosphorus containing intermediates for herbicides | |
DE69019573D1 (de) | Luciferinderivate. | |
AU576805B2 (en) | Production of higher alkylene glycols | |
ZA869400B (en) | A process for the preparation of 7alpha-acetylthiosteroids |