BE811005A - Procede de preparation de mousses de matiere plastique sans agents de demoulage etrangers - Google Patents

Procede de preparation de mousses de matiere plastique sans agents de demoulage etrangers

Info

Publication number
BE811005A
BE811005A BE140882A BE140882A BE811005A BE 811005 A BE811005 A BE 811005A BE 140882 A BE140882 A BE 140882A BE 140882 A BE140882 A BE 140882A BE 811005 A BE811005 A BE 811005A
Authority
BE
Belgium
Prior art keywords
foreign
releasing agents
plastic foams
preparing plastic
preparing
Prior art date
Application number
BE140882A
Other languages
English (en)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Publication of BE811005A publication Critical patent/BE811005A/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
    • 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
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/30—Low-molecular-weight compounds
    • C08G18/36—Hydroxylated esters of higher fatty acids
    • 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
    • C08G18/71—Monoisocyanates or monoisothiocyanates
    • 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
    • C08G18/80—Masked polyisocyanates
    • 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
    • C08G18/80—Masked polyisocyanates
    • C08G18/8003—Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen
    • C08G18/8051—Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen with compounds of C08G18/36
    • 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
    • C08G2110/00—Foam properties
    • C08G2110/0033—Foam properties having integral skins
    • 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
    • C08G2125/00—Compositions for processes using internal mould release agents
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2375/04—Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Polyurethanes Or Polyureas (AREA)
BE140882A 1973-02-16 1974-02-14 Procede de preparation de mousses de matiere plastique sans agents de demoulage etrangers BE811005A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2307589A DE2307589C3 (de) 1973-02-16 1973-02-16 Verfahren zur Herstellung von Schaumstoffen mit vorzüglichen Entformungseigenschaften

Publications (1)

Publication Number Publication Date
BE811005A true BE811005A (fr) 1974-08-14

Family

ID=5872057

Family Applications (1)

Application Number Title Priority Date Filing Date
BE140882A BE811005A (fr) 1973-02-16 1974-02-14 Procede de preparation de mousses de matiere plastique sans agents de demoulage etrangers

Country Status (5)

Country Link
US (1) US4254228A (fr)
JP (1) JPS5818368B2 (fr)
BE (1) BE811005A (fr)
CA (1) CA1037217A (fr)
DE (1) DE2307589C3 (fr)

Families Citing this family (67)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1548370A (en) * 1975-06-24 1979-07-11 Ici Ltd Polyurea foams
DE3030014C2 (de) * 1980-08-08 1983-08-11 Fa. Carl Freudenberg, 6940 Weinheim Elastomerzusammensetzung
US4379100A (en) * 1981-02-02 1983-04-05 Ex-Cell-O Corporation Polyurethane molding process with siloxane internal release agent
GB2092165A (en) * 1981-02-04 1982-08-11 Ici Plc Polysocyanate wax dispersions and their use in the manufacture of sheets or moulded bodies
DE3219040A1 (de) * 1982-05-19 1983-11-24 Bayer Ag, 5090 Leverkusen Verfahren zur herstellung eines urethan- und/oder isocyanuratgruppen aufweisenden zellfoermigen kunststoff-verbundteils
US4546154A (en) * 1983-05-23 1985-10-08 Ici Americas Inc. Process for forming mold releasable polyurethane, polyurea and polyureaurethane resins using isocyanate reactive polysiloxanes as internal mold release agents
JPS59161668U (ja) * 1983-04-15 1984-10-29 株式会社東芝 印刷配線板装置
US4477366A (en) * 1983-05-23 1984-10-16 Ici Americas Inc. Silicone surfactant/organofunctional polysiloxane internal mold release agents
US4490518A (en) * 1983-10-03 1984-12-25 Olin Corporation Liquid organic polyisocyanate-dicarboxylic ester binder composition and lignocellulosic composite materials prepared therefrom
US4490517A (en) * 1983-10-03 1984-12-25 Olin Corporation Solid TDI residue-dicarboxylic ester binder composition and lignocellulosic composite materials prepared therefrom
US4499254A (en) * 1984-02-13 1985-02-12 Texaco Inc. Reaction injection molded elastomers containing high molecular weight organic acids
DE3405875A1 (de) * 1984-02-18 1985-08-22 Basf Ag, 6700 Ludwigshafen Verfahren zur herstellung von zelligen oder kompakten polyurethan-polyharnstoff-formkoerpern mit verbesserten entformungseigenschaften sowie innere formtrennmittel fuer das polyisocyanat-polyadditionsverfahren
DE3436163A1 (de) * 1984-10-03 1986-04-10 Bayer Ag, 5090 Leverkusen Verfahren zur herstellung von formkoerpern
JPS6183077U (fr) * 1984-11-07 1986-06-02
USH444H (en) * 1985-05-20 1988-03-01 A. E. Staley Manufacturing Company Process for making molded articles with mold release agents
US4833182A (en) * 1986-09-29 1989-05-23 Jim Walter Research Corp. Isocyanate-polyester polyol binder for manufacture of cellulosic composites
US4933232A (en) * 1986-11-28 1990-06-12 Jim Walter Research Corp. Isocyanate-carboxyl group-containing fatty compounds for manufacture of lignocellulosic composites
US4772442A (en) * 1986-11-28 1988-09-20 Jim Walter Research Corp. Isocyanate-carboxyl group-containing fatty compounds for manufacture of lignocellulosic composites
JPS63164395A (ja) * 1986-12-26 1988-07-07 松下電器産業株式会社 印刷配線板
JPS63159873U (fr) * 1987-04-08 1988-10-19
DE3815947C1 (fr) * 1988-05-10 1989-10-05 Bayer Ag, 5090 Leverkusen, De
US4868224A (en) * 1988-10-21 1989-09-19 Mobay Corporation Process for the production of molded products using internal mold release agents
DE3837351C1 (fr) * 1988-11-03 1989-11-23 Th. Goldschmidt Ag, 4300 Essen, De
US5019317A (en) * 1989-05-24 1991-05-28 Mobay Corporation Process for the production of molded products using internal mold release agents
US4954537A (en) * 1989-06-08 1990-09-04 Mobay Corporation Internal mold release agent for use in polyurea rim systems
US4983643A (en) * 1989-06-08 1991-01-08 Mobay Corporation Polyurea elastomers with reduced brittleness
US5128087A (en) * 1990-03-09 1992-07-07 Miles Inc. Process for the production of molded products using internal mold release agents
GB9011992D0 (en) * 1990-05-30 1990-07-18 Ici Plc Polyisocyanate composition
US5198508A (en) * 1990-09-18 1993-03-30 Mitsui Toatsu Chemicals, Inc. Resin compositions and molded articles
US5137966A (en) * 1991-02-25 1992-08-11 Miles Inc. Internal release agents, active hydrogen containing mixtures which contain such agents and the use thereof in a process for the production of molded products
US5125974A (en) * 1991-04-22 1992-06-30 Miles Inc. Internal mold release agents and the use thereof in the production of molded products
US5160538A (en) * 1991-04-22 1992-11-03 Miles Inc. Internal release agents, active hydrogen containing mixtures which contain such agents and the use thereof in a process for the production of molded products
US5125973A (en) * 1991-04-22 1992-06-30 Miles Inc. Internal mold release agents and use thereof in the production of molded products
US5158607A (en) * 1991-05-08 1992-10-27 Miles Inc. Internal release agents, active hydrogen containing mixtures which contain such agents and the use thereof in a process for the production of molded products
DE4223597A1 (de) * 1992-07-17 1994-01-20 Bayer Ag Lagerstabile, Formtrennmittel enthaltende Polyolgemische
US5208268A (en) * 1992-09-25 1993-05-04 Miles Inc. Internal release agents, active hydrogen containing mixtures which contain such agents and the use thereof in a process for the production of molded products
CA2107950C (fr) * 1992-10-22 2001-08-14 Bayer Corporation Stabilisation de systemes rim qui contiennent des additifs acides
US5283311A (en) * 1992-12-30 1994-02-01 Basf Corporation Fatty prepolymers and fatty-modified polyisocyanates as internal mold release agents
CA2120648C (fr) * 1993-04-22 2004-06-22 Neil H. Nodelman Nouveau systeme de catalyseur destine aux systemes rim contenant des additifs acides
US5389696A (en) * 1993-09-17 1995-02-14 Miles Inc. Process for the production of molded products using internal mold release agents
US5500176A (en) * 1993-09-17 1996-03-19 Bayer Corporation Process for the production of molded products using internal mold release agents
DE4434694C1 (de) * 1994-09-28 1996-03-07 Josef Lechner Verwendung von Polyolderivaten als innere Trennmittel bei der Herstellung von Polyurethan-Formteilen
US5529739A (en) * 1994-11-15 1996-06-25 Bayer Corporation Process for the production of molded products using internal mold release agents
US5527834A (en) * 1994-11-30 1996-06-18 Inoac Corporation Waterproof plastic foam
US6552153B1 (en) 1997-01-17 2003-04-22 Bayer Aktiengesellschaft Thermoplastic resins having incorporated mold release agents
WO1999016602A2 (fr) 1997-09-29 1999-04-08 Bayer Aktiengesellschaft Agents de demoulage internes perfectionnes pour la fabrication de corps moules en polyurethane
US7195726B1 (en) 1998-08-26 2007-03-27 Dow Global Technologies Inc. Internal mold release for low density reaction injection molded polyurethane foam
ES2228093T3 (es) * 1998-08-26 2005-04-01 Dow Global Technologies, Inc. Agente desmoldeante interno para espuma de poliuretano moldeada por inyeccion a reaccion de baja densidad.
JP2003502459A (ja) * 1999-06-11 2003-01-21 イーストマン・ケミカル・レジンズ・インコーポレーテッド ポリオール、ポリウレタン系および、それをベースにしたポリウレタン反応性ホットメルト接着剤
US6448364B1 (en) 2001-03-16 2002-09-10 Bayer Corporation IMR having synergistic effect with stabilizing system additives and catalyst package
DE10259184B3 (de) * 2002-12-18 2004-09-09 Bayer Ag Stabile Polyoldispersionen und daraus hergestellte Polyurethanformkörper und ihre Verwendung
US7888425B2 (en) * 2004-07-16 2011-02-15 Reichhold, Inc. Low volatile organic compound stable solvent-based polyurethane compositions for coatings
DE102006060376A1 (de) 2006-12-20 2008-06-26 Bayer Materialscience Ag Verfahren zur Herstellung von PIPA-Polyolen zur Herstellung von hochelastischen Polyurethan-Weichschaumstoffen
DE102007009126A1 (de) 2007-02-24 2008-08-28 Bayer Materialscience Ag Verfahren zur Herstellung Polyurethan-Weichschaumstoffen mit niedriger Rohdichte
DE102008044706A1 (de) * 2008-08-28 2010-03-04 Emery Oleochemicals Gmbh Viskositätsreduzierer für Polyetherpolyole
MX2010005069A (es) 2009-05-27 2010-11-26 Bayer Materialscience Ag Procedimiento para la fabricacion de espumas blandas de poliuretano con emision reducida.
MX2012000213A (es) 2009-07-09 2012-01-25 Bayer Materialscience Ag Procedimiento para la fabricacion de materiales de espuma de poliuretano ignifugos con buenas propiedades de uso a largo plazo.
US20110230581A1 (en) 2010-03-17 2011-09-22 Bayer Materialscience Llc Process for the production of polyether polyols with a high ethylene oxide content
US9701804B2 (en) * 2010-11-22 2017-07-11 Covestro Deutschland Ag Method for producing flexible polyurethane foams
US20130237624A1 (en) * 2010-11-22 2013-09-12 Bayer Intellectual Property Gmbh Method for producing flexible polyurethane foams
EP2655475A1 (fr) 2010-12-20 2013-10-30 Bayer Intellectual Property GmbH Procédé de production de polyéther-ester polyols
US10106638B2 (en) * 2011-07-29 2018-10-23 Evonik Degussa Gmbh Reduced emissions low density spray polyurethane foam
US10156352B2 (en) 2013-04-19 2018-12-18 Covestro Llc In mold electronic printed circuit board encapsulation and assembly
KR20250044797A (ko) 2014-06-12 2025-04-01 더 케무어스 컴퍼니 에프씨, 엘엘씨 표면 효과 조성물을 위한 왁스 및 우레탄계 증량제 블렌드
EP3330308A1 (fr) 2016-12-05 2018-06-06 Covestro Deutschland AG Procédé de fabrication de mousses souples en polyuréthane à base de tdi comprenant des anhydrides d'acide organiques et/ou des chlorures d'acides organiques
WO2020076579A1 (fr) 2018-10-09 2020-04-16 Covestro Llc Modules électroniques moulés par insertion utilisant un polycarbonate thermoconducteur et des éléments moulés de verrouillage
EP3760659A1 (fr) 2019-07-01 2021-01-06 Covestro Deutschland AG Polyols amorcés par de l'amine en tant que catalyseurs pouvant être intégrés dans la mousse hr

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2850464A (en) * 1953-09-22 1958-09-02 Du Pont Manufacture of cellular polyurethane plastics
DE1020179B (de) * 1956-07-14 1957-11-28 Bayer Ag Verfahren zur Herstellung von hochporoesen harten Leichtstoffen
BE562425A (fr) 1956-11-16
BE581667A (fr) 1958-08-15
US3110695A (en) * 1960-07-15 1963-11-12 Koppers Co Inc Process for polymerizing methylmethacrylate in presence of polyethylene oxide
US3178490A (en) * 1961-10-06 1965-04-13 Thiokol Chemical Corp Process for producing a foamed plastic article having a dense skin
GB1022434A (en) * 1961-11-28 1966-03-16 Union Carbide Corp Improvements in and relating to polymers
US3523093A (en) * 1961-11-28 1970-08-04 Paul Stamberger Method of producing polyurethanes by reacting polyisocyanate with a preformed polymer resulting from polymerization of ethylenically unsaturated monomers
US3304273A (en) * 1963-02-06 1967-02-14 Stamberger Paul Method of preparing polyurethanes from liquid, stable, reactive, filmforming polymer/polyol mixtures formed by polymerizing an ethylenically unsaturated monomer in a polyol
GB994890A (en) 1961-12-18 1965-06-10 Ici Ltd New organic polyisocyanates and their manufacture
US3182104A (en) * 1962-02-14 1965-05-04 Glidden Co Process for making thick-skinned articles comprising polyurethane foam
US3201359A (en) * 1964-06-19 1965-08-17 Sun Oil Co Process for preparing wax extended polyurethane foams
DE1227456B (de) * 1965-04-09 1966-10-27 Bayer Ag Verfahren zur Herstellung endstaendig hydroxymethylsubstituierter Organopolysiloxane
US3394164A (en) * 1965-10-24 1968-07-23 Upjohn Co Stabilized methylenebis-(phenyl isocyanate) compositions
GB1162517A (en) 1965-11-12 1969-08-27 Dunlop Co Ltd Process for the production of Polyurethane Foams
US3492330A (en) * 1965-12-09 1970-01-27 Union Carbide Corp Norbornane diisocyanates
US3567763A (en) * 1966-01-06 1971-03-02 Rohm & Haas Ester polyisocyanates
US3442925A (en) * 1966-07-01 1969-05-06 Bayer Ag Process for the production of hydroxymethylsiloxanes
GB1190370A (en) * 1966-10-22 1970-05-06 Scholten Res N V Improvements in or relating to Cellular Polyurethanes
DE1694138C2 (de) 1967-03-15 1982-06-09 Bayer Ag, 5090 Leverkusen Verfahren zur Herstellung von harten Schaumstoff-Formteilen
DE1248919B (de) * 1967-10-12 1967-08-31 Hermann Joseph Neidhart, Genf-Bernex, Rico Neidhart, Genf (Schweiz) Verfahren und Vorrichtung zum Zusammenbau von Torsionsfederungselemenien
BE757939A (fr) * 1969-10-24 1971-04-01 Bayer Ag Procede de preparation de matieres en mousses
DE2013787A1 (de) * 1970-03-23 1971-10-21 Bayer Verfahren zur Herstellung von Polyurethanschaumstoffen
US3827993A (en) * 1972-06-14 1974-08-06 Sherwin Williams Co Liquid polyol compositions

Also Published As

Publication number Publication date
JPS5818368B2 (ja) 1983-04-12
CA1037217A (fr) 1978-08-29
DE2307589C3 (de) 1984-11-15
DE2307589B2 (de) 1980-11-13
JPS49114695A (fr) 1974-11-01
US4254228A (en) 1981-03-03
DE2307589A1 (de) 1974-09-05

Similar Documents

Publication Publication Date Title
BE811005A (fr) Procede de preparation de mousses de matiere plastique sans agents de demoulage etrangers
BE757939A (fr) Procede de preparation de matieres en mousses
BE823506A (fr) Procede de preparation de mousses synthetiques se demoulant facilement
BE771174A (fr) Procede de formage d'articles en matiere plastique sans dechets
BE808848A (fr) Procede de moulage de resines expansees
BE796396A (fr) Procede de preparation d'elements moules en silicates
BE822490A (fr) Procede de preparation de polyesters thermoplastiques
BE806806A (fr) Procede de preparation de mousses de polyurethanne
BE798483A (fr) Procede de preparation d'aldehydes
BE808223A (fr) PROCEDE DE PRODUCTION DE MOUSSES COLOREES DE àOLYURETHANNE
BE754455A (fr) Procede de preparation de matieres en mousses a cellules ouvertes
BE795486Q (fr) Procede de preparation d'objets en matiere thermoplastique
BE791310A (fr) Procede de preparation de pieces moulees en mousse
BE819922A (fr) Procede de preparation de mousses de resines epoxydiques
BE797346A (fr) Procede de preparation de 1-hydroxy-2-pyridones
BE810367A (fr) Procede de preparation de mousses de polyurethane
BE801589A (fr) Procede ameliore de preparation de mousses de polyurethannes
BE807345A (fr) Procede de preparation d'hydroxylamines aromatiques en presence de catalyseurs
BE793721A (fr) Procede de preparation de cetones aromatiques
BE818740A (fr) Procede de preparation de mousses de polyurethannes
BE766377A (fr) Procede de preparation de matieres thermoplastiques moulees et marbree
BE801446A (fr) Procede de preparation de mousses de polyurethannes
BE803773A (fr) Procede de preparation d'aminobenzenes
BE805635A (fr) Procede de preparation de thiazolsulfenamides
BE804709A (fr) Procede de preparation du 1,4-diacetoxybutane

Legal Events

Date Code Title Description
RE20 Patent expired

Owner name: BAYER A.G.

Effective date: 19940214