FR2350372A1 - Procede de preparation de resines synthetiques reticulees a base d'esters cyaniques - Google Patents

Procede de preparation de resines synthetiques reticulees a base d'esters cyaniques

Info

Publication number
FR2350372A1
FR2350372A1 FR7713944A FR7713944A FR2350372A1 FR 2350372 A1 FR2350372 A1 FR 2350372A1 FR 7713944 A FR7713944 A FR 7713944A FR 7713944 A FR7713944 A FR 7713944A FR 2350372 A1 FR2350372 A1 FR 2350372A1
Authority
FR
France
Prior art keywords
synthetic resins
resins based
preparing cross
linked synthetic
cyanic
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.)
Granted
Application number
FR7713944A
Other languages
English (en)
Other versions
FR2350372B1 (fr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayer AG
Original Assignee
Bayer AG
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 by Bayer AG filed Critical Bayer AG
Publication of FR2350372A1 publication Critical patent/FR2350372A1/fr
Application granted granted Critical
Publication of FR2350372B1 publication Critical patent/FR2350372B1/fr
Granted legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00Polymeric products of isocyanates or isothiocyanates
    • C08G18/06Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40High-molecular-weight compounds
    • C08G18/42Polycondensates having carboxylic or carbonic ester groups in the main chain
    • C08G18/46Polycondensates having carboxylic or carbonic ester groups in the main chain having heteroatoms other than oxygen
    • C08G18/4615Polycondensates having carboxylic or carbonic ester groups in the main chain having heteroatoms other than oxygen containing nitrogen
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14Closures
    • B22D41/22Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
    • B22D41/28Plates therefor
    • B22D41/34Supporting, fixing or centering means therefor
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00Polymeric products of isocyanates or isothiocyanates
    • C08G18/06Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40High-molecular-weight compounds
    • C08G18/48Polyethers
    • C08G18/50Polyethers having heteroatoms other than oxygen
    • C08G18/5021Polyethers having heteroatoms other than oxygen having nitrogen
    • C08G18/5036Polyethers having heteroatoms other than oxygen having nitrogen containing -N-C=O groups
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00Polymeric products of isocyanates or isothiocyanates
    • C08G18/06Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/83Chemically modified polymers
    • C08G18/833Chemically modified polymers by nitrogen containing compounds
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G73/00Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
    • C08G73/06Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
    • C08G73/0622Polycondensates containing six-membered rings, not condensed with other rings, with nitrogen atoms as the only ring hetero atoms
    • C08G73/0638Polycondensates containing six-membered rings, not condensed with other rings, with nitrogen atoms as the only ring hetero atoms with at least three nitrogen atoms in the ring
    • C08G73/065Preparatory processes
    • C08G73/0655Preparatory processes from polycyanurates

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)
  • Mechanical Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)
  • Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Furnace Charging Or Discharging (AREA)
FR7713944A 1976-05-08 1977-05-06 Procede de preparation de resines synthetiques reticulees a base d'esters cyaniques Granted FR2350372A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2620423A DE2620423B2 (de) 1976-05-08 1976-05-08 Schieberplatteneinheit fur Schieberverschlüsse
DE19762620487 DE2620487A1 (de) 1976-05-08 1976-05-08 Verfahren zur herstellung vernetzter kunststoffe

Publications (2)

Publication Number Publication Date
FR2350372A1 true FR2350372A1 (fr) 1977-12-02
FR2350372B1 FR2350372B1 (fr) 1984-06-29

Family

ID=25770434

Family Applications (2)

Application Number Title Priority Date Filing Date
FR7713944A Granted FR2350372A1 (fr) 1976-05-08 1977-05-06 Procede de preparation de resines synthetiques reticulees a base d'esters cyaniques
FR7713867A Withdrawn FR2350161A1 (fr) 1976-05-08 1977-05-06 Plaque tiroir composite pour fermeture a tiroir

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR7713867A Withdrawn FR2350161A1 (fr) 1976-05-08 1977-05-06 Plaque tiroir composite pour fermeture a tiroir

Country Status (14)

Country Link
US (2) US4141478A (fr)
JP (2) JPS52138438A (fr)
AT (1) AT350205B (fr)
AU (1) AU2494077A (fr)
BE (2) BE854346A (fr)
BR (1) BR7702945A (fr)
CS (1) CS193094B2 (fr)
DE (2) DE2620423B2 (fr)
FR (2) FR2350372A1 (fr)
GB (2) GB1537007A (fr)
LU (1) LU77281A1 (fr)
NL (1) NL7705035A (fr)
SE (1) SE7705000L (fr)
ZA (1) ZA772704B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0298742A2 (fr) * 1987-07-08 1989-01-11 Amoco Corporation Accélérateurs de durcissement latent pour des esters cyanates
WO1996027628A1 (fr) * 1995-03-03 1996-09-12 Minnesota Mining And Manufacturing Company Composition durcissant sous l'effet de differentes energies comportant un monomere ou un oligomere de cyanate ester et un polyol

Families Citing this family (58)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2821839B2 (de) * 1978-05-19 1981-04-16 Stopine AG, Zug Schiebeverschluß für den Ausguß an Metallschmelze enthaltenden Behältern
JPS5690823A (en) * 1979-12-24 1981-07-23 Mitsubishi Gas Chem Co Inc Curable resin composition
DE8013402U1 (de) * 1980-05-17 1980-08-21 Martin & Pagenstecher Gmbh, 5000 Koeln Schieberplatte fuer schieberverschluesse
US4429112A (en) 1981-06-02 1984-01-31 Mitsubishi Gas Chemical Co., Inc. Process of delaying cure of curable resin composition containing cyanate ester compound with benzene sulfonic acid compound
IT1142623B (it) * 1981-12-22 1986-10-08 Flocon Italiana Procedimento per rigenerare una piastra mobile di un cassetto di colata di una siviera
US4573616A (en) * 1982-05-24 1986-03-04 Flo-Con Systems, Inc. Valve, clamp, refractory and method
DE3223181C2 (de) * 1982-06-22 1984-07-12 Didier-Werke Ag, 6200 Wiesbaden Einspannvorrichtung für eine Verschlußplatte an einem Schiebeverschluß für den Ausguß an einem Metallschmelze enthaltenden Behälter
US4528366A (en) * 1982-09-28 1985-07-09 The Dow Chemical Company Production of polytriazines from aromatic polycyanates with cobalt salt of a carboxylic acid as catalyst
JPS59105047A (ja) * 1982-12-07 1984-06-18 Mitsubishi Gas Chem Co Inc アセタ−ル樹脂組成物
JPS59150656A (ja) * 1983-02-16 1984-08-28 Toshiba Ceramics Co Ltd スライデイングノズル装置
CH659872A5 (de) * 1983-09-02 1987-02-27 Stopinc Ag Verschlussplatte fuer einen schiebeverschluss.
US4713442A (en) * 1983-11-16 1987-12-15 The Dow Chemical Company Polyaromatic cyanate
US4751323A (en) * 1983-11-16 1988-06-14 The Dow Chemical Company Novel polyaromatic cyanates
DE3345539C1 (de) * 1983-12-16 1985-07-18 Didier-Werke Ag, 6200 Wiesbaden Feuerfeste Verschlußplatte für Schieberverschlüsse
DE3421205C2 (de) * 1984-06-07 1986-10-30 Metacon AG, Zürich Einrichtung zum Festlegen einer feuerfesten Verschlußplatte eines Schieberverschlusses
US4582232A (en) * 1984-06-19 1986-04-15 Flo-Con Systems, Inc. Valve, clamp, refractory and method
US4555553A (en) * 1985-02-15 1985-11-26 The Dow Chemical Company Hydroxyaromatic oligomers of a mixed cyanate and aromatic polyamine and epoxy resins thereof
US4555554A (en) * 1985-02-15 1985-11-26 The Dow Chemical Company Oligomeric vinyl ester resin compositions containing triazine groups and imino carbamate linkages
DE3609687A1 (de) * 1985-03-29 1986-10-02 Nisshinbo Industries, Inc., Tokio/Tokyo Duroplastisches harz und verfahren zu seiner erzeugung
DE3519759A1 (de) * 1985-06-01 1986-12-04 Kernforschungsanlage Jülich GmbH, 5170 Jülich Abzugseinrichtung fuer einen hochtemperaturreaktor
US4615471A (en) * 1985-06-19 1986-10-07 M. H. Detrich Refractory plate and method for reinforcing
US4604452A (en) * 1985-10-21 1986-08-05 Celanese Corporation Metal carboxylate/alkylphenol curing catalyst for polycyanate esters of polyhydric phenols
US4608434A (en) * 1985-10-21 1986-08-26 Celanese Corporation Metal carboxylate/alcohol curing catalyst for polycyanate ester of polyhydric phenol
DE3802979A1 (de) * 1988-02-02 1989-08-10 Basf Ag Waermehaertbare harzmischung
US5215860A (en) * 1988-08-19 1993-06-01 Minnesota Mining And Manufacturing Company Energy-curable cyanate compositions
JPH0337264A (ja) * 1989-07-04 1991-02-18 Mitsubishi Gas Chem Co Inc シアン酸エステル系樹脂硬化物の製造法
US5442039A (en) * 1989-07-17 1995-08-15 The Dow Chemical Company Mesogenic polycyanates and thermosets thereof
US5428125A (en) * 1989-07-17 1995-06-27 The Dow Chemical Company Mesogenic polycyanates and thermosets thereof
DE3932958A1 (de) * 1989-10-03 1991-04-11 Bayer Ag Verfahren zur herstellung licht- und abgasbestaendiger puh-elastomerfaeden und -folien und elastomerfaeden entsprechender zusammensetzung
DE3932948A1 (de) * 1989-10-03 1991-04-11 Bayer Ag Verfahren zur herstellung von segmentierten polyurethanharnstoff-elastomerloesungen, sowie faeden und folien daraus
US4999699A (en) * 1990-03-14 1991-03-12 International Business Machines Corporation Solder interconnection structure and process for making
WO1991018957A1 (fr) * 1990-06-08 1991-12-12 Minnesota Mining And Manufacturing Company Adhesif recyclable pour applications electroniques
US5143785A (en) * 1990-08-20 1992-09-01 Minnesota Mining And Manufacturing Company Cyanate ester adhesives for electronic applications
US5264500A (en) * 1991-07-30 1993-11-23 Allied-Signal Inc. APT resins
US5206321A (en) * 1991-10-03 1993-04-27 The Dow Chemical Company Polycyanates containing mesogenic moieties as lateral substituents
US5280878A (en) * 1991-12-31 1994-01-25 Shinagawa Refractories Co., Ltd. Plate brick for sliding gate valve
DE4339316C2 (de) * 1993-04-03 1996-11-14 Schladofsky Leopold Dipl Ing F Feuerfeste Verschlußplatte für Schieberverschlüsse an metallurgischen Gefäßen wie Gießpfannen sowie an Verteilerrinnen für Metallschmelzen und Verfahren zur Herstellung der Verschlußplatte
FR2713524A1 (fr) * 1993-12-07 1995-06-16 Detalle Anne Plaques et éléments composites pour fermetures à tiroir et autres dispositifs.
FR2740368B1 (fr) * 1995-10-27 1997-12-12 Vesuvius France Sa Procede de reutilisation de plaques de fermeture a tiroir et plaque pour cette fermeture
US20010020071A1 (en) 1997-10-10 2001-09-06 Capote Miguel Albert High performance cyanate-bismaleimide-epoxy resin compositions for printed circuits and encapsulants
US6190759B1 (en) 1998-02-18 2001-02-20 International Business Machines Corporation High optical contrast resin composition and electronic package utilizing same
US6387990B1 (en) * 1999-09-10 2002-05-14 General Electric Company Curable epoxy resin compositions with brominated triazine flame retardants
US6565969B1 (en) 1999-10-21 2003-05-20 3M Innovative Properties Company Adhesive article
EP1138419A1 (fr) * 2000-03-29 2001-10-04 Vesuvius Crucible Company Cale d'un dispositif de clamage de plaque réfractaire dans un valve à tiroir
US7192997B2 (en) * 2001-02-07 2007-03-20 International Business Machines Corporation Encapsulant composition and electronic package utilizing same
US20030221770A1 (en) * 2002-05-28 2003-12-04 3M Innovative Properties Company Segmented curable transfer tapes
US7713604B2 (en) * 2002-06-17 2010-05-11 3M Innovative Properties Company Curable adhesive articles having topographical features therein
EP1557449A1 (fr) * 2004-01-22 2005-07-27 3M Innovative Properties Company Ruban adhésif pour assemblage structurel
DE602004021259D1 (de) * 2004-10-19 2009-07-09 3M Innovative Properties Co Klebeartikel mit Kern/Mantelstruktur
US7540990B1 (en) * 2004-11-18 2009-06-02 Callaway Golf Company Cross-linked thermoplastic polyurethane/polyurea and method of making same
US7417094B2 (en) * 2004-11-18 2008-08-26 Pripro Polymer, Inc. Cross-linked thermoplastic polyurethane/polyurea and method of making same
EP1710286A1 (fr) * 2005-04-04 2006-10-11 3M Innovative Properties Company Coussin de renfort
WO2007149530A2 (fr) * 2006-06-21 2007-12-27 Greene, Tweed Of Delaware, Inc. Trappe de soupape à fente
KR100821188B1 (ko) 2006-11-06 2008-04-14 조선내화 주식회사 슬라이드 게이트용 밸브판
EP2389406A1 (fr) 2008-12-16 2011-11-30 Dow Global Technologies LLC Compositions homogènes de bismaléimide/triazine/époxy utiles à la fabrication de stratifiés électriques
WO2010111084A2 (fr) * 2009-03-24 2010-09-30 Drexel University Glycol polyéthylénique et polyéthylène oxyde par dépôt chimique en phase vapeur induit
BR112018073028B1 (pt) 2016-05-10 2023-04-11 Huntsman Advanced Materials Americas Llc Sistema curável, artigo curado, e, método para produção de um prepreg ou towpreg
US10227444B2 (en) * 2016-06-01 2019-03-12 International Business Machines Corporation Degradable polyurethanes containing thioaminal groups

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1234399A (fr) * 1958-08-04 1960-10-17 Bayer Ag Procédé de préparation de produits de condensation par réaction des esters triaryliques de l'acide cyanurique avec des dérivés polyhydroxylés
DE1220133B (de) * 1964-06-09 1966-06-30 Bayer Ag Verfahren zur Herstellung von stickstoffhaltigen Polyaddukten
FR2015182A1 (fr) * 1968-08-06 1970-04-24 Bayer Ag
FR2019348A1 (fr) * 1968-08-16 1970-07-03 Agfa Gevaert Ag

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US506328A (en) * 1893-10-10 Ladle for handling molten steel
US1611844A (en) * 1926-01-06 1926-12-21 Loose Seat Valve Company Gate valve
US3595900A (en) * 1968-07-01 1971-07-27 Minnesota Mining & Mfg Cyanatophenyl-terminated polyarylene ethers
US3694410A (en) * 1969-03-05 1972-09-26 Minnesota Mining & Mfg Use of chelates in preparing polycyanurates
US3738962A (en) * 1971-03-08 1973-06-12 Minnesota Mining & Mfg Cyanurates of cyanatophenyl-terminated polyarylene ethers
US3866806A (en) * 1973-03-01 1975-02-18 United States Steel Corp Operating mechanism for slidable gates and method of operating slide gate
DE2330113A1 (de) * 1973-06-13 1975-01-09 Didier Werke Ag Vorrichtung zur austauschbaren halterung eines eintauchausgusses
DE2360709A1 (de) * 1973-12-06 1975-06-12 Bayer Ag S-triazin-vorpolymerisaten
JPS51540A (ja) * 1974-06-25 1976-01-06 Fsk Kk Saishitsuseisetsuchakuzaisoseibutsu

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1234399A (fr) * 1958-08-04 1960-10-17 Bayer Ag Procédé de préparation de produits de condensation par réaction des esters triaryliques de l'acide cyanurique avec des dérivés polyhydroxylés
DE1220133B (de) * 1964-06-09 1966-06-30 Bayer Ag Verfahren zur Herstellung von stickstoffhaltigen Polyaddukten
FR2015182A1 (fr) * 1968-08-06 1970-04-24 Bayer Ag
FR2019348A1 (fr) * 1968-08-16 1970-07-03 Agfa Gevaert Ag

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0298742A2 (fr) * 1987-07-08 1989-01-11 Amoco Corporation Accélérateurs de durcissement latent pour des esters cyanates
EP0298742A3 (en) * 1987-07-08 1989-12-06 Amoco Corporation Latent cure accelerators for cyanate esters
WO1996027628A1 (fr) * 1995-03-03 1996-09-12 Minnesota Mining And Manufacturing Company Composition durcissant sous l'effet de differentes energies comportant un monomere ou un oligomere de cyanate ester et un polyol
US5741879A (en) * 1995-03-03 1998-04-21 Minnesota Mining And Manufacturing Company Energy-polymerizable compositions comprising a cyanate ester monomer or oligomer and a polyol

Also Published As

Publication number Publication date
GB1537007A (en) 1978-12-29
GB1530877A (en) 1978-11-01
FR2350372B1 (fr) 1984-06-29
LU77281A1 (fr) 1977-08-24
US4141478A (en) 1979-02-27
BE854346A (fr) 1977-11-07
FR2350161A1 (fr) 1977-12-02
ATA323777A (de) 1978-10-15
DE2620487A1 (de) 1977-11-24
BE854342A (fr) 1977-09-01
JPS52138438A (en) 1977-11-18
AU2494077A (en) 1978-11-09
ZA772704B (en) 1978-04-26
JPS52136300A (en) 1977-11-14
US4195132A (en) 1980-03-25
DE2620423A1 (de) 1977-11-17
CS193094B2 (en) 1979-09-17
JPS6047288B2 (ja) 1985-10-21
BR7702945A (pt) 1978-01-10
NL7705035A (nl) 1977-11-10
AT350205B (de) 1979-05-25
SE7705000L (sv) 1977-11-09
DE2620423B2 (de) 1978-06-22

Similar Documents

Publication Publication Date Title
BE854346A (fr) Procede de preparation de resines synthetiques reticulees a base d'esters cyaniques
ES547390A0 (es) Procedimiento para preparar polimeros a base de polipropile-no
BE870842A (fr) Procede de preparation d'elastomeres thermoplastiques a base de polyether-polyurethanes
MX158185A (es) Mejoras a composicion a base de polimeros
BE861761A (fr) Luminophore perfectionne a base d'oxyhalogenure de terres-rares
ES486088A0 (es) Procedimiento de preparar resinas polimericas sinteticas re-ticuladas de intercambio anionico
FR2316302A1 (fr) Revetement a l'aide de resines de fluoroethylene
BE852710A (fr) Procede de preparation de composes azotes
FR2352836A1 (fr) Procede de preparation d'un catalyseur de ziegler
BE854334A (fr) Procede de preparation d'hydroxybenzaldehydes
FR2348195A1 (fr) Procede de preparation d'urethanes aromatiques
MA18770A1 (fr) Nouveaux composes lepidoptericides a base d'isothiourees
BE861750A (fr) Procede de preparation d'une polyolefine
LU78561A1 (fr) Procede de preparation de n-imides a partir d'acides amiques
FR2339571A1 (fr) Procede de preparation d'aluminosilicates cristallins a structure de faujasite
BE838736A (fr) Procede de preparation d'esters cyaniques aromatiques
FR2341529A1 (fr) Procede de preparation de b''-a12o3
ES547222A0 (es) Un procedimiento para preparar un polimero termoendurecible
BE849987A (fr) Procede de preparation de resines de polyesters
FR2351975A1 (fr) Procede de preparation d'un dioxolanne substitue perfluore
FR2341596A1 (fr) Procede perfectionne de preparation d'un latex
BE846277A (fr) Procede d'obtension de resines phenoliques expansees
BE881691A (fr) Repartiteur d'infrastructure
BE851779A (fr) Procede de preparation d'halogenoacetals a partir d'esters
BE857436R (fr) Procede de preparation d'hemi-esters sulfutiques