MX145964A - Procedimiento mejorado para la obtencion de un copoliester termoplastico - Google Patents

Procedimiento mejorado para la obtencion de un copoliester termoplastico

Info

Publication number
MX145964A
MX145964A MX171897A MX17189778A MX145964A MX 145964 A MX145964 A MX 145964A MX 171897 A MX171897 A MX 171897A MX 17189778 A MX17189778 A MX 17189778A MX 145964 A MX145964 A MX 145964A
Authority
MX
Mexico
Prior art keywords
copoliester
thermoplastic
obtaining
improved procedure
procedure
Prior art date
Application number
MX171897A
Other languages
English (en)
Inventor
Willem Frederik Borman Borman
Original Assignee
Gen Electric
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 Gen Electric filed Critical Gen Electric
Publication of MX145964A publication Critical patent/MX145964A/es

Links

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
    • C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
    • C08G63/52—Polycarboxylic acids or polyhydroxy compounds in which at least one of the two components contains aliphatic unsaturation
    • 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
    • C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
    • C08G63/16—Dicarboxylic acids and dihydroxy compounds
    • C08G63/18—Dicarboxylic acids and dihydroxy compounds the acids or hydroxy compounds containing carbocyclic rings
    • 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
    • C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
    • C08G63/16—Dicarboxylic acids and dihydroxy compounds
    • C08G63/20—Polyesters having been prepared in the presence of compounds having one reactive group or more than two reactive groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/02—Fibres or whiskers
    • C08K7/04—Fibres or whiskers inorganic
    • C08K7/14—Glass
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S260/00—Chemistry of carbon compounds
    • Y10S260/24—Flameproof

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Polyesters Or Polycarbonates (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
MX171897A 1976-12-23 1978-01-02 Procedimiento mejorado para la obtencion de un copoliester termoplastico MX145964A (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/753,862 US4128526A (en) 1976-12-23 1976-12-23 Copolyesters of poly(alkylene glycol aromatic acid esters) and diesters comprising aromatic diols

Publications (1)

Publication Number Publication Date
MX145964A true MX145964A (es) 1982-04-26

Family

ID=25032465

Family Applications (1)

Application Number Title Priority Date Filing Date
MX171897A MX145964A (es) 1976-12-23 1978-01-02 Procedimiento mejorado para la obtencion de un copoliester termoplastico

Country Status (7)

Country Link
US (1) US4128526A (es)
JP (1) JPS5380494A (es)
AU (1) AU513850B2 (es)
DE (1) DE2757323A1 (es)
FR (1) FR2375270A1 (es)
GB (1) GB1600624A (es)
MX (1) MX145964A (es)

Families Citing this family (75)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2438062A1 (fr) * 1978-10-05 1980-04-30 Rhone Poulenc Ind Procede d'obtention de copolyesters alcoylaromatiques
US4694061A (en) * 1983-10-12 1987-09-15 Ciba-Geigy Corporation Radiation-sensitive polycondensates, processes for their preparation coated material and its use
JPH0670205B2 (ja) * 1985-07-31 1994-09-07 日本ペイント株式会社 上塗り塗料用樹脂組成物
US5955550A (en) * 1994-01-25 1999-09-21 Exxon Chemical Patents, Inc. Polymeric vehicle for providing solventless coating compositions
US5969085A (en) * 1994-01-25 1999-10-19 Exxon Chemical Patents, Inc. Polymeric vehicle for high solids coatings
WO1995019997A1 (en) * 1994-01-25 1995-07-27 Eastern Michigan University Polymeric vehicle effective for providing solventless coating compositions
US5910563A (en) * 1994-01-25 1999-06-08 Exxon Chemical Patents, Inc. Water thinned polymeric vehicle for coating compositions with low amounts of volatile organic compounds
AU1733695A (en) * 1994-01-25 1995-08-08 Eastern Michigan University Polymeric vehicle for high solids coatings
US5610263A (en) * 1994-01-25 1997-03-11 Eastern Michigan University Water thinned polymeric vehicle for coating compositions with low amounts of volatile oragnic compounds
US5489640A (en) 1994-09-01 1996-02-06 General Electric Company Compositions of poly(phenylene ether) and polyester resins, which exhibit improved heat resistance and flow
US5840798A (en) * 1997-06-06 1998-11-24 General Electric Company Glass filled polyester molding composition
US5981661A (en) * 1997-08-29 1999-11-09 General Electric Company Modified weatherable thermoplastic resin molding compositions and articles molded therefrom
US6214916B1 (en) 1998-04-29 2001-04-10 General Electric Company Composition for laser marking
US6127475A (en) * 1998-09-25 2000-10-03 General Electric Company Composition for laser marking
US6011125A (en) * 1998-09-25 2000-01-04 General Electric Company Amide modified polyesters
US6486251B1 (en) 2000-02-29 2002-11-26 General Electric Company Special visual effect polycarbonate-polyester composition
US6482879B2 (en) 2000-04-17 2002-11-19 General Electric Company Composition for laser marking
US20030114575A1 (en) * 2000-08-25 2003-06-19 General Electric Company Fiber reinforced thermoplastic composition
US8034870B2 (en) * 2003-12-17 2011-10-11 Sabic Innovative Plastics Ip B.V. Flame-retardant polyester composition
US7807745B2 (en) * 2006-01-27 2010-10-05 Sabic Innovative Plastics Ip B.V. Molding compositions containing polycarbonate and modified polybutylene terephthalate (PBT) random copolymers derived from polyethylene terephthalate (PET)
US8067493B2 (en) * 2003-12-30 2011-11-29 Sabic Innovative Plastics Ip B.V. Polymer compositions, method of manufacture, and articles formed therefrom
US20050165207A1 (en) * 2003-12-31 2005-07-28 General Electric Company Polyester molding composition and process for its preparartion
US20070173619A1 (en) * 2005-05-23 2007-07-26 Yu Claire Q Low gloss thermoplastic articles
US8084550B2 (en) * 2005-05-23 2011-12-27 Sabic Innovative Plastics Ip B.V. Low gloss thermoplastic composition
US20060270767A1 (en) * 2005-05-26 2006-11-30 Van Gisbergen Josephus Gerardu Mineral filled polyester polycarbonate composition
US20060287429A1 (en) * 2005-06-17 2006-12-21 Gaggar Satish K Glass fiber thermoplastic composite
US7435780B2 (en) * 2005-11-29 2008-10-14 Sabic Innovavtive Plastics Ip B.V. Poly(arylene ether) compositions and methods of making the same
US7902264B2 (en) * 2006-01-27 2011-03-08 Sabic Innovative Plastics Ip B.V. Polytrimethylene terephthalate (PTT) derived from polyethylene terephthalate (PET) and containing PET residues
US8680167B2 (en) * 2006-01-27 2014-03-25 Sabic Innovative Plastics Ip B.V. Molding compositions containing fillers and modified polybutylene terephthalate (PBT) random copolymers derived from polyethylene terephthalate (PET)
US7935737B2 (en) * 2006-01-27 2011-05-03 Sabic Innovative Plastics Ip B.V. Articles derived from compositions containing modified polybutylene terephthalate (PBT) random copolymers derived from polyethylene terephthalate (PET)
US7923506B2 (en) * 2006-01-27 2011-04-12 Sabic Innovative Plastics Ip B.V. Molding compositions containing modified polybutylene terephthalate (PBT) random copolymers derived from polyethylene terephthalate (PET)
US7902263B2 (en) * 2006-01-27 2011-03-08 Sabic Innovative Plastics Ip B.V. Process for making polybutylene terephthalate (PBT) from polyethylene terephthalate (PET)
US7855238B2 (en) * 2006-01-27 2010-12-21 Sabic Innovative Plastics Ip B.V. Molding compositions containing polyalkylene terephthalates and modified polybutylene terephthalate (PBT) random copolymers derived from PET
US7795320B2 (en) * 2006-01-27 2010-09-14 Sabic Innovative Plastics Ip B.V. Copolyetheresters derived from polyethylene terephthalate
US7799836B2 (en) * 2006-03-01 2010-09-21 Sabic Innovative Plastics Ip B.V. Process for making polybutylene terephthalate (PBT) from polyethylene terephthalate (PET)
US20070213473A1 (en) * 2006-03-09 2007-09-13 Yu Claire Q Composition and method of use
US8309656B2 (en) 2006-07-26 2012-11-13 Sabic Innovative Plastics Ip B.V. Elastomer blends containing polycarbonates and copolyetheresters derived from polyethylene terephthalate, method of manufacture, and articles therefrom
US7799838B2 (en) 2006-07-26 2010-09-21 Sabic Innovative Plastics Ip B.V. Elastomer blends of polyesters and copolyetheresters derived from polyethylene terephthalate, method of manufacture, and articles therefrom
US8158710B2 (en) * 2006-11-27 2012-04-17 Sabic Innovative Plastics Ip B.V. Polyester blends, methods of making, and articles formed therefrom
US20080248278A1 (en) * 2007-04-02 2008-10-09 General Electric Company Fiber reinforced thermoplastic sheets with surface coverings and methods of making
US8536272B2 (en) * 2007-07-12 2013-09-17 Sabic Innovative Plastics Ip B.V. Thermoplastic poly(arylene ether)/polyester blends and method of making
US8092717B2 (en) * 2007-07-12 2012-01-10 Sabic Innovative Plastics Ip B.V. Thermoplastic poly(arylene ether) / polyester blends and articles thereof
US20090069489A1 (en) * 2007-09-12 2009-03-12 Peter Vollenberg Polycarbonate-poly(ester-ether) copolymer composition, method of manufacture, and articles therefrom
US20090170985A1 (en) * 2007-12-28 2009-07-02 Rina Ai Polyester-polyamide compositions, articles, and method of manufacture thereof
US7799892B2 (en) * 2008-05-02 2010-09-21 Sabic Innovative Plastics Ip B.V. Method of making polybutylene terephthalate and compositions and articles comprising the same
US7928150B2 (en) * 2008-05-06 2011-04-19 Sabic Innovative Plastics Ip B.V. Process for the manufacture of lonomeric polybutylene terephthalate from polyethylene terephthalate, and compositions and articles thereof
US8017697B2 (en) * 2008-06-24 2011-09-13 Sabic Innovative Plastics Ip B.V. Poly(arylene ether)-polysiloxane composition and method
EP2169007B1 (en) 2008-09-30 2012-07-11 SABIC Innovative Plastics IP B.V. Method for preparing a poly(arylene ether) composition with improved melt flow
US7847032B2 (en) * 2008-12-10 2010-12-07 Sabic Innovative Plastics Ip B.V. Poly(arylene ether) composition and extruded articles derived therefrom
US20100168321A1 (en) * 2008-12-30 2010-07-01 Cahoon-Brister Kristen Poly(butylene terephthalate) compositions, methods of manufacture, and articles thereof
US20100168317A1 (en) * 2008-12-30 2010-07-01 Cahoon-Brister Kristen Poly(butylene terephthalate) compositions, methods of manufacture, and articles thereof
US7910657B2 (en) * 2008-12-30 2011-03-22 Sabic Innovative Plastics Ip B.V. Process for the manufacture of polybutylene terephthalate copolymers from polyethylene terephthalate, and compositions and articles thereof
US8138244B2 (en) * 2008-12-30 2012-03-20 Sabic Innovative Plastics Ip B.V. Reinforced polyester compositions, method of manufacture, and articles thereof
US7829614B2 (en) * 2008-12-30 2010-11-09 Sabic Innovative Plastics Ip B.V. Reinforced polyester compositions, methods of manufacture, and articles thereof
US20100168328A1 (en) * 2008-12-30 2010-07-01 Ganesh Kannan Process for the manufacture of polycyclohexane dimethylene terephthalate copolymers from polyethylene terephthalate, and compositions and articles thereof
US8017716B2 (en) * 2009-07-01 2011-09-13 Sabic Innovative Plastics Ip B.V. Morpholine-substituted poly(arylene ether) and method for the preparation thereof
US20110152420A1 (en) * 2009-12-22 2011-06-23 Mark Elkovitch Poly(arylene ether)/polyamide compositions, methods, and articles
US8309655B2 (en) 2009-12-22 2012-11-13 Sabic Innovative Plastics Ip B.V. Methods for the preparation of a poly(arylene ether) polysiloxane multiblock copolymer, multiblock copolymers produced thereby, and associated compositions and articles
US8450412B2 (en) * 2009-12-22 2013-05-28 Sabic Innovative Plastics Ip B.V. Flame retardant polyamide composition, method, and article
US8129471B2 (en) * 2009-12-30 2012-03-06 Sabic Innovative Plastics Ip B.V. Polycarbonate-poly(ether-ester) copolymer composition, method of manufacture, and articles therefrom
US8669332B2 (en) 2011-06-27 2014-03-11 Sabic Innovative Plastics Ip B.V. Poly(arylene ether)-polysiloxane composition and method
US8933162B2 (en) 2011-07-15 2015-01-13 Saudi Basic Industries Corporation Color-stabilized biodegradable aliphatic-aromatic copolyesters, methods of manufacture, and articles thereof
US9334360B2 (en) 2011-07-15 2016-05-10 Sabic Global Technologies B.V. Color-stabilized biodegradable aliphatic-aromatic copolyesters, methods of manufacture, and articles thereof
US8877862B2 (en) 2011-07-15 2014-11-04 Saudi Basic Industries Corporation Method for color stabilization of poly(butylene-co-adipate terephthalate
US8557158B2 (en) 2011-08-23 2013-10-15 Sabic Innovative Plastics Ip B.V. Molded article having enhanced aesthetic effect and method and system for making the molded article
US8946345B2 (en) 2011-08-30 2015-02-03 Saudi Basic Industries Corporation Method for the preparation of (polybutylene-co-adipate terephthalate) through the in situ phosphorus containing titanium based catalyst
US8722837B2 (en) 2012-01-31 2014-05-13 Sabic Innovative Plastics Ip B.V. Poly(phenylene ether)-polysiloxane composition and method
US8889820B2 (en) 2012-02-15 2014-11-18 Saudi Basic Industries Corporation Amorphous, high glass transition temperature copolyester compositions, methods of manufacture, and articles thereof
US8969506B2 (en) 2012-02-15 2015-03-03 Saudi Basic Industries Corporation Amorphous, high glass transition temperature copolyester compositions, methods of manufacture, and articles thereof
US8901273B2 (en) 2012-02-15 2014-12-02 Saudi Basic Industries Corporation Amorphous, high glass transition temperature copolyester compositions, methods of manufacture, and articles thereof
US9034983B2 (en) 2012-03-01 2015-05-19 Saudi Basic Industries Corporation Poly(butylene-co-adipate terephthalate), method of manufacture and uses thereof
US8895660B2 (en) 2012-03-01 2014-11-25 Saudi Basic Industries Corporation Poly(butylene-co-adipate terephthalate), method of manufacture, and uses thereof
US8901243B2 (en) 2012-03-30 2014-12-02 Saudi Basic Industries Corporation Biodegradable aliphatic-aromatic copolyesters, methods of manufacture, and articles thereof
EP3262119B1 (en) 2015-02-23 2020-09-23 SABIC Global Technologies B.V. Electrical tracking resistance compositions, articles formed therefrom, and methods of manufacture thereof
EP3262123B1 (en) 2015-02-23 2019-04-17 SABIC Global Technologies B.V. Electrical tracking resistance compositions, articles formed therefrom, and methods of manufacture thereof

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3047536A (en) * 1957-02-05 1962-07-31 Dow Chemical Co Polyesters
US3278640A (en) * 1963-03-11 1966-10-11 Borg Warner Segmented copolyester comprising aromatic and aliphatic polyester segments
US3341154A (en) * 1963-08-01 1967-09-12 Smith & Sons Ltd S Control systems for aircraft engine installations
US3557053A (en) * 1968-03-18 1971-01-19 Mobay Chemical Corp High temperature thermoplastics stabilized with a tris(halophenyl)phosphate,a tris(halonaphthyl) phosphate,a tris(halophenyl)phosphine oxide,a tris(halonaphthyl)phosphine oxide,a polyhalophosphate,a polyhalophenylphosphate,a polyhalonaphthylphosphate,a polyhalophosphate and mixtures thereof
US3830771A (en) * 1970-06-29 1974-08-20 Celanese Corp Phosphorus-containing polyesters
US3681281A (en) * 1970-07-10 1972-08-01 Celanese Corp Flame-retardant polyesters
US3671487A (en) * 1971-05-05 1972-06-20 Gen Electric Glass reinforced polyester resins containing polytetrafluoroethylene and flame retardant additives
BE794938A (fr) * 1972-02-02 1973-08-02 Eastman Kodak Co Nouveau procede de preparation de copolyesters et applications
US3915926A (en) * 1972-03-10 1975-10-28 Gen Electric Flame retardant thermoplastic compositions
US3833685A (en) * 1972-03-10 1974-09-03 Gen Electric Flame retardant thermoplastic compositions
US3936400A (en) * 1972-03-10 1976-02-03 General Electric Company Flame retardant foamed polyester compositions

Also Published As

Publication number Publication date
US4128526A (en) 1978-12-05
AU513850B2 (en) 1981-01-08
FR2375270B1 (es) 1984-06-29
JPS5380494A (en) 1978-07-15
AU3191177A (en) 1979-06-28
FR2375270A1 (fr) 1978-07-21
GB1600624A (en) 1981-10-21
DE2757323A1 (de) 1978-06-29

Similar Documents

Publication Publication Date Title
MX145964A (es) Procedimiento mejorado para la obtencion de un copoliester termoplastico
AR222778A1 (es) Procedimiento para la obtencion de hentriacontapeptidos
MX147295A (es) Procedimiento mejorado para la obtencion de amoniaco
MX5132E (es) Procedimiento para preparar un alcano de bispiridinio
AR213861A1 (es) Un procedimiento para la obtencion de un preparado fomentador de la coagulacion de la sangre
AR224493A1 (es) Un procedimiento para la produccion de n-fosfonometil glicina
MX147440A (es) Procedimiento mejorado para la obtencion de metacroleina
MX147734A (es) Procedimiento mejorado para la obtencion de dimetil-eter
AR218880A1 (es) Procedimiento para producir un polimero de olefina
MX147703A (es) Procedimiento para la obtencion de compuestos de polifluoroaliloxi
SE415773B (sv) Termoplastisk pressmassa
ES496318A0 (es) Un aparato de afeitar perfeccionado
AR224494A1 (es) Un procedimiento para preparar cefalexina de accion prolongada
MX4323E (es) Procedimiento para preparar un aminoglicosido de 2-deoxiestreptamina
MX146302A (es) Procedimiento mejorado para la obtencion de un copolimero ahulado substancialmente aleatorio
SE428893B (sv) Nav for fixering av en skerring
DD133962A5 (de) Thermoplastische pressmassen
ES490101A0 (es) Un procedimiento para obtener 2,6-diaminonebularinas
AR222022A1 (es) Un procedimiento de obtencion de d1-2(alpha-trifluorometil-bencilamino)-tiazolina
AR219727A1 (es) Procedimiento para obtener fenil nonatetraeno sustituido
MX4127E (es) Procedimiento mejorado para la obtencion de un latex de policloropreno
AR213652A1 (es) Procedimiento para la obtencion de 5-m-tolil oxiuracilo
AR224149A1 (es) Un procedimiento para producir piran-4-onas
MX146732A (es) Procedimiento mejorado para la obtencion de polimeros de xileno-formaldehido
MX147828A (es) Procedimiento mejorado para la obtencion de butanodioles