ES8601111A1 - Procedimiento para preparar a,a,a',a', -tetrametil-xililendiisocianatos - Google Patents
Procedimiento para preparar a,a,a',a', -tetrametil-xililendiisocianatosInfo
- Publication number
- ES8601111A1 ES8601111A1 ES539050A ES539050A ES8601111A1 ES 8601111 A1 ES8601111 A1 ES 8601111A1 ES 539050 A ES539050 A ES 539050A ES 539050 A ES539050 A ES 539050A ES 8601111 A1 ES8601111 A1 ES 8601111A1
- Authority
- ES
- Spain
- Prior art keywords
- alkyl
- urethanes
- iii
- coor
- biphenyl
- 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
- -1 aralkyl urethanes Chemical group 0.000 title abstract 4
- 239000012948 isocyanate Chemical group 0.000 title abstract 4
- 150000002513 isocyanates Chemical group 0.000 title abstract 2
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 abstract 6
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical compound C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 abstract 6
- 125000000217 alkyl group Chemical group 0.000 abstract 5
- 150000003673 urethanes Chemical class 0.000 abstract 4
- 235000010290 biphenyl Nutrition 0.000 abstract 3
- 239000004305 biphenyl Substances 0.000 abstract 3
- 125000004432 carbon atom Chemical group C* 0.000 abstract 3
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 abstract 3
- 125000001624 naphthyl group Chemical group 0.000 abstract 3
- 238000000576 coating method Methods 0.000 abstract 2
- 150000002148 esters Chemical class 0.000 abstract 2
- 125000001475 halogen functional group Chemical group 0.000 abstract 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 abstract 1
- 239000003377 acid catalyst Substances 0.000 abstract 1
- 125000001118 alkylidene group Chemical group 0.000 abstract 1
- 150000004945 aromatic hydrocarbons Chemical group 0.000 abstract 1
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 abstract 1
- 150000004657 carbamic acid derivatives Chemical class 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 229920001971 elastomer Polymers 0.000 abstract 1
- 239000000806 elastomer Substances 0.000 abstract 1
- 229920005570 flexible polymer Polymers 0.000 abstract 1
- 229910052736 halogen Inorganic materials 0.000 abstract 1
- 150000002367 halogens Chemical class 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000004009 herbicide Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 abstract 1
- 230000009972 noncorrosive effect Effects 0.000 abstract 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 abstract 1
- 229920005862 polyol Polymers 0.000 abstract 1
- 150000003077 polyols Chemical class 0.000 abstract 1
- 239000000843 powder Substances 0.000 abstract 1
- 239000007858 starting material Substances 0.000 abstract 1
- 125000001424 substituent group Chemical group 0.000 abstract 1
- 238000005979 thermal decomposition reaction Methods 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C271/00—Derivatives of carbamic acids, i.e. compounds containing any of the groups, the nitrogen atom not being part of nitro or nitroso groups
- C07C271/06—Esters of carbamic acids
- C07C271/08—Esters of carbamic acids having oxygen atoms of carbamate groups bound to acyclic carbon atoms
- C07C271/10—Esters of carbamic acids having oxygen atoms of carbamate groups bound to acyclic carbon atoms with the nitrogen atoms of the carbamate groups bound to hydrogen atoms or to acyclic carbon atoms
- C07C271/22—Esters of carbamic acids having oxygen atoms of carbamate groups bound to acyclic carbon atoms with the nitrogen atoms of the carbamate groups bound to hydrogen atoms or to acyclic carbon atoms to carbon atoms of hydrocarbon radicals substituted by carboxyl groups
-
- 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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7614—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring
- C08G18/7628—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring containing at least one isocyanate or isothiocyanate group linked to the aromatic ring by means of an aliphatic group
- C08G18/765—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring containing at least one isocyanate or isothiocyanate group linked to the aromatic ring by means of an aliphatic group alpha, alpha, alpha', alpha', -tetraalkylxylylene diisocyanate or homologues substituted on the aromatic ring
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C263/00—Preparation of derivatives of isocyanic acid
- C07C263/04—Preparation of derivatives of isocyanic acid from or via carbamates or carbamoyl halides
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
- Saccharide Compounds (AREA)
Abstract
PROCEDIMIENTO PARA PREPARAR AAAA-TETRAMETIL-XILILENDIISOCIANATOS. CONSISTE EN: A) REACCIONAR UN DIISOPROPENILBENCENO E ISOPROPENIL-AA2-DIMETILBENCILURETANO CON UN EXCESO DE CARBAMATO DE METILO EN PRESENCIA DE CALOR MODERADO Y DE UN CATALIZADOR ACIDO PARA CONVERTIR LAS OLEFINAS A URETANOS; B) NEUTRALIZAR EL CATALIZADOR EN LA MEZCLA RESULTANTE; C) SEPARAR EL CARBONATO DE METILO SIN REACCIONAR DE LA MEZCLA NEUTRALIZADA; D) CRAQUEAR TERMICAMENTE LA MEZCLA SEPARADA PARA CONVERTIR URETANOS E ISOCIANATOS CON LO QUE SE OBTIENE UNA MEZCLA QUE INCLUYE TETRAMETILXILILENDIISOCIANATO E ISOPROPENILDIMETILBENCILISOCIANATO; E) RECUPERAR METANOL DE LA MEZCLA; F) SEPARAR EL ISOPROPENIL-DIMETILBENCIL-ISOCIANATO Y EL TETRAMETIL-XILILEN-DIISOCIANATO DE LA MEZCLA; G) REACCIONAR EL ISOPROPENIL-DIMETILBENCIL-ISOCIANATO Y METANOL PARA FORMAR ISOPROPENIL-DIMETILBENCIL-URETANO; Y H) RECICLAR ESTE COMPUESTO FORMADO Y EL CARBAMATO DE METILO CON DIISOPROPENILBENCENO.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/400,799 US4439616A (en) | 1982-07-22 | 1982-07-22 | Tertiary aralkyl urethanes and isocyanates derived therefrom |
| EP85101500A EP0164491B1 (en) | 1982-07-22 | 1983-07-01 | Process for the preparation of tertiary aralkyl urethanes and process for the preparation of isocyanates derived therefrom |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| ES8601111A1 true ES8601111A1 (es) | 1985-11-16 |
| ES539050A0 ES539050A0 (es) | 1985-11-16 |
Family
ID=26096462
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES524345A Expired ES8504686A1 (es) | 1982-07-22 | 1983-07-21 | Procedimiento para preparar uretanos. |
| ES539050A Granted ES539050A0 (es) | 1982-07-22 | 1984-12-26 | Procedimiento para preparar a,a,a',a', -tetrametil-xililendiisocianatos |
| ES539049A Expired ES8601110A1 (es) | 1982-07-22 | 1984-12-26 | Procedimiento para preparar isocianatos de terc-aralquilo |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES524345A Expired ES8504686A1 (es) | 1982-07-22 | 1983-07-21 | Procedimiento para preparar uretanos. |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES539049A Expired ES8601110A1 (es) | 1982-07-22 | 1984-12-26 | Procedimiento para preparar isocianatos de terc-aralquilo |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US4439616A (es) |
| EP (3) | EP0101832B1 (es) |
| JP (2) | JPS5933256A (es) |
| KR (1) | KR910002533B1 (es) |
| AT (1) | ATE52502T1 (es) |
| CA (1) | CA1213897A (es) |
| DE (3) | DE3382549D1 (es) |
| ES (3) | ES8504686A1 (es) |
Families Citing this family (44)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4570012A (en) * | 1983-01-10 | 1986-02-11 | American Cyanamid Co. | Urethanes from tertiary aralkyl diols |
| US4588802A (en) * | 1984-08-09 | 1986-05-13 | American Cyanamid Company | Polyurethanes based on polyether blends |
| US4604439A (en) * | 1985-05-28 | 1986-08-05 | The Goodyear Tire & Rubber Company | Functionalized monomers from 1-(1-isocyanato-1-methylethyl)-3- or 4-(1-methylethenyl) benzene |
| US4672059A (en) * | 1985-06-10 | 1987-06-09 | American Home Products Corporation | N-[[5-(trifluoromethyl)-6-methoxy-1-naphthalenyl]-thioxomethyl and carbonyl]-N-methylglycinamides |
| US4746754A (en) * | 1986-05-16 | 1988-05-24 | The Dow Chemical Company | Preparation of carbonate diisocyanates and related compounds |
| US4879410A (en) * | 1986-11-03 | 1989-11-07 | American Cyanamid Company | Preparation of primary aralkyl urethanes and ureas and isocyanates derived therefrom |
| EP0266659B1 (en) * | 1986-11-03 | 1994-04-27 | American Cyanamid Company | Process for the preparation of tertiary aralkyl monourethanes |
| US4987248A (en) * | 1989-08-02 | 1991-01-22 | E. I. Du Pont De Nemours And Company | Acid catalyzed formation of carbamates from olefins |
| US5171818A (en) * | 1990-03-23 | 1992-12-15 | Bruce Wilson | Sprayable aliphatic polyurea-polyurethane coating compositions and methods |
| JPH04221356A (ja) * | 1990-12-20 | 1992-08-11 | Mitsubishi Gas Chem Co Inc | キシリレンジイソシアネートの製造方法 |
| US5194660A (en) * | 1990-12-21 | 1993-03-16 | Union Carbide Chemicals & Plastics Technology Corporation | Processes for producing carbamates and isocyanates |
| US5126476A (en) * | 1991-01-25 | 1992-06-30 | Arco Chemical Technology, L.P. | Process for the preparation of aryl-, heteroaryl-, or cycloalkyl-substituted alkyl urethanes and isocyanates |
| DE4143688B4 (de) | 1991-03-30 | 2007-03-29 | Basf Coatings Ag | Verwendung eines Mischsystems sowie Verfahren zur Herstellung von Wasserbasislacken und von wasserverdünnbaren Überzugsmitteln |
| US5252689A (en) * | 1992-10-20 | 1993-10-12 | American Cyanamid Company | N-hydroxysuccinimide-blocked isopropenyl-alpha, alpha-dimethylbenzyl isocyanate and self-cross linking copolymers thereof |
| US5233003A (en) * | 1992-10-20 | 1993-08-03 | American Cyanamid Company | Process for the preparation of gel-free self-crosslinking copolymers derived from blocked isopropenyl-alpha, alpha-dimethylbenzyl isocyanate |
| US5294671A (en) * | 1993-05-13 | 1994-03-15 | American Cyanamid Company | Monomeric aminoplast crosslinking agents |
| US5451638A (en) * | 1993-05-10 | 1995-09-19 | Cytec Technology Corp. | Copolymeric aminoplast crosslinking agents |
| US5462971A (en) * | 1994-02-16 | 1995-10-31 | Arco Chemical Technology, L.P. | Process for treating polyether polyols |
| US5840908A (en) * | 1994-05-09 | 1998-11-24 | Cytec Technology Corp. | Sulfenamide accelerators and rubber compositions containing the same |
| CA2205730A1 (en) * | 1996-05-22 | 1997-11-22 | H.B. Fuller Licensing & Financing, Inc. | A structural reactive latex |
| US6025026A (en) * | 1997-06-30 | 2000-02-15 | Transitions Optical, Inc. | Process for producing an adherent polymeric layer on polymeric substrates and articles produced thereby |
| DE19727892A1 (de) | 1997-07-01 | 1999-01-07 | Basf Coatings Ag | Wäßrige Pulverlack-Dispersion, Verfahren zu ihrer Herstellung sowie Verwendung der erhaltenen Pulverlack-Dispersion |
| ES2185202T3 (es) | 1997-07-22 | 2003-04-16 | Basf Coatings Ag | Producto de revestimiento y procedimiento para su fabricacion. |
| US6630599B1 (en) | 1998-01-06 | 2003-10-07 | Cytec Technology Corp. | Process for preparing derivatives of isopropenyl-α, α-dimethylbenzyl isocyanate |
| DE19904330A1 (de) | 1999-01-28 | 2000-08-10 | Basf Coatings Ag | Wäßriger Beschichtungsstoff und Modulsystem zu seiner Herstellung |
| DE19914055A1 (de) | 1999-03-27 | 2000-09-28 | Basf Coatings Ag | Wasserverdünnbares Überzugsmittel |
| DE19921457B4 (de) | 1999-05-08 | 2006-05-04 | Basf Coatings Ag | Modulsystem zur Herstellung wäßriger Beschichtungsstoffe, Verfahren zu deren Herstellung und Verwendung sowie damit hergestellte Lackierungen |
| US6916537B2 (en) * | 2001-11-01 | 2005-07-12 | Transitions Optical Inc. | Articles having a photochromic polymeric coating |
| US6998072B2 (en) * | 2001-11-01 | 2006-02-14 | Transitions Optical, Inc. | Photochromic polymerizable compositions |
| US20060266472A1 (en) * | 2005-05-06 | 2006-11-30 | Kipp Michael D | Vacuum bagging methods and systems |
| WO2007130372A2 (en) * | 2006-05-01 | 2007-11-15 | American Consulting Technology & Research | Method for extending the useful life of mold type tooling |
| US20080106007A1 (en) * | 2006-10-17 | 2008-05-08 | Kipp Michael D | Resin infusion process utilizing a reusable vacuum bag |
| US20080105997A1 (en) * | 2006-10-17 | 2008-05-08 | Ridges Michael D | Method for enhancing the sealing potential of formable, disposable tooling materials |
| WO2008070110A1 (en) * | 2006-12-04 | 2008-06-12 | American Consulting Technology & Research, Inc. | Shrinkable film barrier for mandrel tooling members |
| WO2008086022A1 (en) * | 2007-01-09 | 2008-07-17 | American Consulting Technology & Research Inc. | Multi-function vacuum bag for composite part manuacture |
| WO2010019802A1 (en) | 2008-08-15 | 2010-02-18 | Gesturetek, Inc. | Enhanced multi-touch detection |
| MX2012010068A (es) | 2010-03-02 | 2012-12-17 | Ppg Ind Ohio Inc | Composiciones de revestimiento de un componente, curables al ambiente, que cotienen agua, metodos relacionados y sustratos revestidos. |
| TWI461501B (zh) | 2010-12-20 | 2014-11-21 | 漢高智慧財產控股公司 | 光可固化切割黏晶膠帶 |
| EP2676749A4 (en) | 2011-02-14 | 2015-04-08 | Nippon Steel & Sumitomo Metal Corp | DEVICE FOR MEASURING THE SURFACE TEMPERATURE OF A CAST PLATE FOR USE IN A CONTINUOUS CASTING INSTALLATION |
| US10487233B2 (en) | 2011-04-12 | 2019-11-26 | Basf Coatings Gmbh | Solvent-borne clearcoat coating composition, method for producing it and use thereof |
| US9267054B2 (en) | 2011-11-25 | 2016-02-23 | Basf Coatings Gmbh | Solvent-containing clearcoat coating composition, process for preparation thereof and use thereof |
| US12552931B2 (en) | 2019-01-25 | 2026-02-17 | Isp Investments Llc | Dihydroxy lactam based polymers, compositions and applications thereof |
| CN117440978A (zh) | 2021-06-07 | 2024-01-23 | 巴斯夫涂料有限公司 | 水性涂料组合物、其制备方法及其应用 |
| CN118146118A (zh) * | 2022-12-07 | 2024-06-07 | 万华化学集团股份有限公司 | 提高异氰酸酯的收率的方法和异氰酸酯的制备方法 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE625748A (es) * | ||||
| NL302592A (es) * | 1960-05-16 | 1900-01-01 | ||
| US3477933A (en) * | 1966-06-06 | 1969-11-11 | Stauffer Chemical Co | Process for preparing n-monosubstituted carbamic acid esters |
| US3962302A (en) * | 1974-03-08 | 1976-06-08 | Atlantic Richfield Company | Production of isocyanates from esters of carbamic acids (urethanes) |
| JPS5934702B2 (ja) * | 1976-10-25 | 1984-08-24 | 昭和電工株式会社 | α・α−ジメチルベンジルイソシアネ−ト又はその核置換体の製造法 |
| US4379767A (en) * | 1982-03-08 | 1983-04-12 | American Cyanamid Company | Manufacture of isocyanates |
-
1982
- 1982-07-22 US US06/400,799 patent/US4439616A/en not_active Expired - Lifetime
-
1983
- 1983-07-01 AT AT85101500T patent/ATE52502T1/de not_active IP Right Cessation
- 1983-07-01 DE DE8787101520T patent/DE3382549D1/de not_active Expired - Fee Related
- 1983-07-01 DE DE8585101500T patent/DE3381539D1/de not_active Expired - Fee Related
- 1983-07-01 EP EP83106424A patent/EP0101832B1/en not_active Expired
- 1983-07-01 EP EP87101520A patent/EP0234353B1/en not_active Expired
- 1983-07-01 EP EP85101500A patent/EP0164491B1/en not_active Expired
- 1983-07-01 DE DE8383106424T patent/DE3368411D1/de not_active Expired
- 1983-07-21 KR KR1019830003358A patent/KR910002533B1/ko not_active Expired
- 1983-07-21 ES ES524345A patent/ES8504686A1/es not_active Expired
- 1983-07-21 JP JP58132035A patent/JPS5933256A/ja active Granted
- 1983-07-21 CA CA000432926A patent/CA1213897A/en not_active Expired
-
1984
- 1984-12-26 ES ES539050A patent/ES539050A0/es active Granted
- 1984-12-26 ES ES539049A patent/ES8601110A1/es not_active Expired
-
1992
- 1992-01-14 JP JP4023354A patent/JPH0617354B2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0101832A1 (en) | 1984-03-07 |
| EP0164491B1 (en) | 1990-05-09 |
| ES524345A0 (es) | 1985-05-01 |
| KR910002533B1 (ko) | 1991-04-23 |
| JPH0617354B2 (ja) | 1994-03-09 |
| ES539049A0 (es) | 1985-11-16 |
| ES8504686A1 (es) | 1985-05-01 |
| JPS5933256A (ja) | 1984-02-23 |
| DE3382549D1 (de) | 1992-05-27 |
| JPH0439456B2 (es) | 1992-06-29 |
| ES8601110A1 (es) | 1985-11-16 |
| KR840005712A (ko) | 1984-11-16 |
| JPH0558983A (ja) | 1993-03-09 |
| EP0164491A1 (en) | 1985-12-18 |
| US4439616A (en) | 1984-03-27 |
| EP0234353B1 (en) | 1992-04-22 |
| DE3381539D1 (de) | 1990-06-13 |
| EP0101832B1 (en) | 1986-12-17 |
| ATE52502T1 (de) | 1990-05-15 |
| EP0234353A1 (en) | 1987-09-02 |
| DE3368411D1 (en) | 1987-01-29 |
| ES539050A0 (es) | 1985-11-16 |
| CA1213897A (en) | 1986-11-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| ES8601111A1 (es) | Procedimiento para preparar a,a,a',a', -tetrametil-xililendiisocianatos | |
| KR960002372B1 (ko) | 중합가능한 모노머 | |
| US3072676A (en) | Process for preparaing ethylene monothiolcarbonate | |
| JPS646238A (en) | Production of carboxylic amides or esters | |
| US2395750A (en) | Unsaturated derivatives of carbamic acid | |
| EP0508430B1 (en) | Process for the preparation of bisoxazolidines containing urethane groups | |
| IL43647A (en) | Production of n-chloroformyl-carbonic acid amides and certain such novel amides | |
| EP0083685B1 (en) | Manufacture of diisocyanates | |
| US3477933A (en) | Process for preparing n-monosubstituted carbamic acid esters | |
| IT1228972B (it) | Procedimento per la preparazione di acido 3 alfa 7 beta diidrossicolanico di elevata purezza. | |
| KR880006284A (ko) | 일차 아르알킬 우레탄 및 우레아와 이들로 부터 유도된 이소시아네이트의 제조방법 | |
| ES8609199A1 (es) | Procedimiento para preparar esteres de acido 2-cloropropio- nico | |
| HU185972B (en) | Process for preparing aliphatic isocyanates | |
| IL44188A (en) | Manufacture of s-triazinyl-mono-and diisocyanates | |
| US4395369A (en) | Manufacture of isocyanate | |
| US4029686A (en) | Production of isocyanates | |
| US2938049A (en) | 9, 10-dihydro-11, 12-dioxy-9, 10-ethanoanthracene and esters thereof | |
| JPS56167688A (en) | Urethane bicycloorthoester | |
| US2898363A (en) | Isocyanato-mustard oils | |
| JPS63183552A (ja) | 第三級アラルキルモノウレタンの製造方法 | |
| US3795642A (en) | Tris(hydroxyalkyl)-3,3,3-nitrilotripropionates | |
| US3399233A (en) | Process for the preparation of 2-aryl 1, 1, 3, 3-tetraalkyl guanidines | |
| JPS57149260A (en) | Methylenating method of n-phenylcarbamic ester | |
| JPS5785353A (en) | Preparation of aromatic urethane compound | |
| US3468908A (en) | Hexafluoroisopropylidenethietanes and their s-oxides and s-dioxides |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MM4A | Patent lapsed |
Effective date: 19960506 |