BE778676A - Procede pour preparer des esters de 4-piperidinols et leur utilisation comme stabilisants - Google Patents

Procede pour preparer des esters de 4-piperidinols et leur utilisation comme stabilisants

Info

Publication number
BE778676A
BE778676A BE778676A BE778676A BE778676A BE 778676 A BE778676 A BE 778676A BE 778676 A BE778676 A BE 778676A BE 778676 A BE778676 A BE 778676A BE 778676 A BE778676 A BE 778676A
Authority
BE
Belgium
Prior art keywords
piperidinols
stabilizers
esters
preparing
piperidinols esters
Prior art date
Application number
BE778676A
Other languages
English (en)
Inventor
K Murayama
S Morimura
T Yoshioka
H Horiuchi
S Higashida
Original Assignee
Sankyo Co
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
Priority claimed from JP316571A external-priority patent/JPS5632308B1/ja
Application filed by Sankyo Co filed Critical Sankyo Co
Publication of BE778676A publication Critical patent/BE778676A/fr

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D211/00Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings
    • C07D211/04Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D211/06Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members
    • C07D211/36Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D211/40Oxygen atoms
    • C07D211/44Oxygen atoms attached in position 4
    • C07D211/46Oxygen atoms attached in position 4 having a hydrogen atom as the second substituent in position 4
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D211/00Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings
    • C07D211/92Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with a hetero atom directly attached to the ring nitrogen atom
    • C07D211/94Oxygen atom, e.g. piperidine N-oxide
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D221/00Heterocyclic compounds containing six-membered rings having one nitrogen atom as the only ring hetero atom, not provided for by groups C07D211/00 - C07D219/00
    • C07D221/02Heterocyclic compounds containing six-membered rings having one nitrogen atom as the only ring hetero atom, not provided for by groups C07D211/00 - C07D219/00 condensed with carbocyclic rings or ring systems
    • C07D221/20Spiro-condensed ring systems
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D471/00Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00
    • C07D471/02Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00 in which the condensed system contains two hetero rings
    • C07D471/10Spiro-condensed systems
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07FACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F5/00Compounds containing elements of Groups 3 or 13 of the Periodic Table
    • C07F5/02Boron compounds
    • C07F5/04Esters of boric acids
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07FACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F7/00Compounds containing elements of Groups 4 or 14 of the Periodic Table
    • C07F7/02Silicon compounds
    • C07F7/04Esters of silicic acids
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07FACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F9/00Compounds containing elements of Groups 5 or 15 of the Periodic Table
    • C07F9/02Phosphorus compounds
    • C07F9/547Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom
    • C07F9/553Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom having one nitrogen atom as the only ring hetero atom
    • C07F9/576Six-membered rings
    • C07F9/59Hydrogenated pyridine rings
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00Use of organic ingredients
    • C08K5/16Nitrogen-containing compounds
    • C08K5/34Heterocyclic compounds having nitrogen in the ring
    • C08K5/3412Heterocyclic compounds having nitrogen in the ring having one nitrogen atom in the ring
    • C08K5/3432Six-membered rings
    • C08K5/3435Piperidines

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Hydrogenated Pyridines (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
BE778676A 1971-01-29 1972-01-28 Procede pour preparer des esters de 4-piperidinols et leur utilisation comme stabilisants BE778676A (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP316571A JPS5632308B1 (fr) 1971-01-29 1971-01-29
CA133,553A CA985831A (en) 1971-01-29 1972-01-31 Process for preparing acid esters of 4-piperidinol derivatives and their use as stabilizers
AT725673A AT320992B (de) 1971-01-29 1972-01-31 Stabilisierte Zusammensetzung
CA237,404A CA997353A (en) 1971-01-29 1975-10-10 Process for preparing acid esters of 4-piperidinol derivatives and their use as stabilizers

Publications (1)

Publication Number Publication Date
BE778676A true BE778676A (fr) 1972-07-28

Family

ID=45065548

Family Applications (1)

Application Number Title Priority Date Filing Date
BE778676A BE778676A (fr) 1971-01-29 1972-01-28 Procede pour preparer des esters de 4-piperidinols et leur utilisation comme stabilisants

Country Status (15)

Country Link
US (1) US3840494A (fr)
AT (2) AT320992B (fr)
AU (1) AU470423B2 (fr)
BE (1) BE778676A (fr)
BR (1) BR7200471D0 (fr)
CA (2) CA985831A (fr)
CH (1) CH562792A5 (fr)
DD (1) DD99994A5 (fr)
ES (1) ES399325A1 (fr)
FR (1) FR2123501B1 (fr)
GB (2) GB1390252A (fr)
IT (1) IT954877B (fr)
NL (2) NL154241B (fr)
SU (2) SU470112A3 (fr)
ZA (1) ZA72574B (fr)

Families Citing this family (81)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE792043A (fr) * 1971-11-30 1973-05-29 Ciba Geigy Derives de la piperidine utilisables pour stabiliser des matieres organiques
US4021432A (en) * 1971-11-30 1977-05-03 Ciba-Geigy Corporation Piperidine derivatives
US4110305A (en) * 1971-11-30 1978-08-29 Ciba-Geigy Corporation Polymers stabilized by esters of piperidinols
US4049647A (en) * 1971-11-30 1977-09-20 Ciba-Geigy Corporation Bis piperidyl carboxylates
JPS554133B2 (fr) * 1972-07-27 1980-01-29
JPS5147738B2 (fr) * 1973-11-27 1976-12-16
CH589056A5 (fr) * 1973-12-10 1977-06-30 Ciba Geigy Ag
US3920661A (en) * 1973-12-28 1975-11-18 Ciba Geigy Corp Hindered piperidine carboxylic acids, metal salts thereof and stabilized compositions
US4056507A (en) * 1973-12-28 1977-11-01 Ciba-Geigy Corporation Hindered piperidine carboxylic acids, metal salts thereof and stabilized compositions
US3939163A (en) * 1973-12-28 1976-02-17 Ciba-Geigy Corporation Metal salts of hindered piperidine carboxylic acids and stabilized compositions
NO146433C (no) * 1975-03-21 1982-09-29 Montefibre Spa Stabilisert polyolefinmateriale inneholdende et polyamin som stabilisator
US4177186A (en) * 1975-05-28 1979-12-04 Ciba-Geigy Corporation Stabilization of light-sensitive polymers
US4141883A (en) * 1975-05-28 1979-02-27 Sankyo Company, Limited Stabilization of synthetic polymers by penta-or-hexa-substituted 4-piperidinol derivatives
GB1496844A (en) * 1975-05-28 1978-01-05 Ciba Geigy Ag Stabilization of polymers
US4210578A (en) * 1975-05-28 1980-07-01 Ciba-Geigy Corporation 4-Siloxy derivatives of polyalkylated piperidines
JPS5848580B2 (ja) * 1975-05-28 1983-10-29 三共株式会社 ゴウセイコウブンシザイリヨウヨウアンテイザイ
US4191829A (en) * 1975-06-30 1980-03-04 Ciba-Geigy Corporation Hindered piperidine carboxylic acids and metal salts thereof
US4052351A (en) * 1975-08-04 1977-10-04 Phillips Petroleum Company Stabilization of olefin polymers
US4035323A (en) * 1975-08-06 1977-07-12 Phillips Petroleum Company Stabilization of olefin polymers
DE2545646A1 (de) * 1975-10-11 1977-04-21 Bayer Ag Cyanamide
JPS5263183A (en) * 1975-11-19 1977-05-25 Adeka Argus Chem Co Ltd Stabilizer for organic materials
JPS5266551A (en) * 1975-12-01 1977-06-02 Adeka Argus Chem Co Ltd Stabilizer for plastics
JPS52100543A (en) * 1976-02-18 1977-08-23 Adeka Argus Chem Co Ltd Stabilized synthetic resin compositions
US4069196A (en) * 1976-04-13 1978-01-17 Ciba-Geigy Corporation Piperidyl esters of higher di-tri-, and polybasic aliphatic carboxylic acids as stabilizers for polymeric materials
CH626109A5 (fr) * 1976-05-11 1981-10-30 Ciba Geigy Ag
CH623066A5 (fr) * 1976-05-11 1981-05-15 Ciba Geigy Ag
JPS52140555A (en) * 1976-05-19 1977-11-24 Adeka Argus Chem Co Ltd Stabilized synthetic resin composition
JPS537748A (en) * 1976-07-12 1978-01-24 Toray Ind Inc Synthetic resin composition having improved light resistance and gas-stain resistance
US4101508A (en) * 1976-10-26 1978-07-18 Argus Chemical Corporation 2,2,6,6-Tetramethyl-4-piperidyl bicyclic heptane and octane carboxylic acid esters as stabilizers for synthetic polymers
JPS5373241A (en) * 1976-12-10 1978-06-29 Adeka Argus Chem Co Ltd Stabilized synthetic resin compositions
JPS5379935A (en) * 1976-12-24 1978-07-14 Adeka Argus Chem Co Ltd Stabilized synthetic resin composition
BE854444A (fr) * 1977-05-10 1977-11-10 Argus Chem Stabilisants de resines synthetiques contenant des derives de piperidine
US4111901A (en) * 1977-06-06 1978-09-05 Borg-Warner Corporation Hindered five-membered nitrogen rings as polyolefin stabilizers
JPS5429400A (en) * 1977-08-08 1979-03-05 Sankyo Co Ltd Polymer comprising polyalkylpiperidine and its use as stabilizers
JPS5466996A (en) * 1977-11-08 1979-05-29 Sankyo Co Ltd Polymer substituted by polyalkylpiperidine side chain, its preparation and its use as stabilizer
US4164480A (en) * 1978-01-09 1979-08-14 Eastman Kodak Company Polychromophoric ultraviolet stabilizers and their use in organic compositions
US4166803A (en) * 1978-01-09 1979-09-04 Eastman Kodak Company Heterocyclic benzoate ultraviolet stabilizers and their use in organic compositions
US4141884A (en) * 1978-01-09 1979-02-27 Eastman Kodak Company Heterocyclic ester ultraviolet stabilizers and their use in organic compositions
US4194989A (en) * 1978-11-27 1980-03-25 Eastman Kodak Company Piperidinyl hydrogen 2-hydroxyalkyl phosphates and metal salts thereof which compounds are useful as ultraviolet stabilizers for organic compositions
US4250268A (en) * 1978-11-28 1981-02-10 Ciba-Geigy Corporation Polysilylesters having a polyalkylpiperidine as part of the polymer useful as light stabilizers for plastics
US4234699A (en) * 1978-11-29 1980-11-18 Ciba-Geigy Corporation Polymeric light stabilizers for plastics
US4234700A (en) * 1978-12-04 1980-11-18 Ciba-Geigy Corporation Polymeric light stabilizers for plastics
CS229069B1 (en) * 1981-09-23 1984-05-14 Julius Durmis Composition for stabilizing polymers and method of preparing same
EP0078603A1 (fr) * 1981-10-12 1983-05-11 Imperial Chemical Industries Plc Compositions polyoléfiniques et articles stérilisés par irradiation aux rayons gamma
IT1176167B (it) * 1984-05-22 1987-08-18 Montedison Spa Derivati della quattro idrossi metil piperidina alchil sostituita e loro impiego come stabilizzanti
JPS6136339A (ja) * 1984-07-27 1986-02-21 Polyplastics Co 耐候性ポリアセタ−ル樹脂組成物
JPS6147744A (ja) * 1984-08-15 1986-03-08 Polyplastics Co 耐候性ポリアセタ−ル樹脂組成物
JPH0621211B2 (ja) * 1985-08-13 1994-03-23 旭電化工業株式会社 塩化ビニル樹脂組成物
US4762872A (en) * 1985-11-01 1988-08-09 The B. F. Goodrich Company Oligomeric light stabilizers with substituted piperidine ends
US4822833A (en) * 1986-03-10 1989-04-18 Ciba-Geigy Corporation Stabilized rigid polyvinyl chloride compositions
DE3750994D1 (de) * 1986-03-10 1995-03-02 Ciba Geigy Ag Stabilisierte Hart-PVC-Zusammensetzungen.
EP0243319A3 (fr) * 1986-04-25 1989-02-15 Ciba-Geigy Ag Matières thermoplastiques stabilisées contre l'influence de la lumière
US4874391A (en) * 1986-07-29 1989-10-17 Ciba-Geigy Corporation Process for photochemical stabilization of polyamide fiber material and mixtures thereof with other fibers: water-soluble copper complex dye and light-stabilizer
DE3738736A1 (de) * 1987-11-14 1989-05-24 Basf Ag 4-formylaminopiperidinderivate und deren verwendung als stabilisatoren
ES2050274T3 (es) * 1988-06-14 1994-05-16 Ciba Geigy Ag Procedimiento para la estabilizacion fotoquimica de fibras de polipropileno sin teñir y teñidas.
EP0401366A4 (en) * 1988-12-22 1991-06-05 Great Lakes Chemical Corporation Thermally stable and light stable flame retardant thermoplastic polyolefin and polystyren compositions
US5030243A (en) * 1989-01-05 1991-07-09 Ciba-Geigy Corporation Process for the photochemical stabilization of undyed and dyeable artificial leather with a sterically hindered amine
DE69012616T2 (de) * 1989-03-21 1995-01-26 Ciba Geigy Ag Stabilisatoren mit N-hydroxy-substituierter, gehinderter Aminogruppe und ihre Herstellung durch Michael-Addition.
IT1247977B (it) * 1991-06-04 1995-01-05 Ciba Geigy Spa Stabilizzazione di materiali organici polimerici mediante l`impiego dimiscele sinergiche costituite da ammine cicliche stericamente impeditee derivati del 3-pirazolidinone o del 1,2,4,-triazolidin-3,5,-dione
IT1247978B (it) * 1991-06-04 1995-01-05 Ciba Geigy Spa Composti piperidinici contenenti l'anello tetraidrofuranico atti all'impiego come stabilizzanti per materiali organici
US5169949A (en) * 1991-09-30 1992-12-08 Himont Incorporated Monomeric hindered amine esters of monocarboxylic resin acid having 20 carbon atoms
US5444111A (en) * 1993-01-15 1995-08-22 Morton International, Inc. Ammonium chloride as a PVC co-stabilizer
IT1264946B1 (it) * 1993-07-16 1996-10-17 Ciba Geigy Spa Derivati del 2,2,6,6-tetrametil-4-piperidinolo utili come stabilizzanti alla luce ed all'ossidazione per materiali organici.
IT1264817B1 (it) * 1993-07-28 1996-10-10 Ciba Geigy Spa Derivati di polialchil-4-piperidinoli atti all'impderivati di polialchil-4-piperidinoli atti all'impiego come stabilizzanti per materiali organici iego come stabilizzanti per materiali organici
DE69408935T2 (de) * 1993-10-29 1998-07-30 Montell North America Inc Piperidinylphosphitzusammensetzungen und Polyolefinzusammensetzungen die diese enthalten
TW358110B (en) * 1996-05-28 1999-05-11 Ciba Sc Holding Ag Mixture of polyalkylpiperidin-4-yl dicarboxylic acid esters as stabilizers for organic materials
US6414155B1 (en) 2000-11-03 2002-07-02 Cytec Technology Corp. Oligomeric hindered amine light stabilizers based on multi-functional carbonyl compounds and methods of making same
US6492521B2 (en) 2000-11-03 2002-12-10 Cytec Technology Corp. Hindered amine light stabilizers based on multi-functional carbonyl compounds and methods of making same
US6727300B2 (en) 2000-11-03 2004-04-27 Cytec Technology Corp. Polymeric articles containing hindered amine light stabilizers based on multi-functional carbonyl compounds
US6545156B1 (en) 2000-11-03 2003-04-08 Cytec Technology Corp. Oligomeric hindered amine light stabilizers based on multi-functional carbonyl compounds and methods of making same
US6525131B1 (en) 2001-09-18 2003-02-25 Crompton Corporation Aromatic diamine polyurethane curatives with improved stability
US20100305327A1 (en) * 2005-12-27 2010-12-02 Adeka Corporation Nitroxyl compound, and polymerization inhibitor and polymerization inhibitor composition using same
ITMI20080747A1 (it) 2008-04-24 2009-10-25 3V Sigma Spa Miscele di ammine stericamente impedite per la stabilizzazione di polimeri
FR2943676B1 (fr) * 2009-03-26 2017-03-24 Univ De Provence Composes biradicalaires de type dinitroxyde optimises pour la polarisation dynamique nucleaire (pdn)
IT1399477B1 (it) 2010-03-15 2013-04-19 3V Sigma Spa Miscele di ammine stericamente impedite per la stabilizzazione di polimeri
ITMI20110802A1 (it) 2011-05-10 2012-11-11 3V Sigma Spa Miscele di ammine stericamente impedite per la stabilizzazione di polimeri
JP6375887B2 (ja) 2014-05-26 2018-08-22 Jnc株式会社 液晶組成物および液晶表示素子
JP6435874B2 (ja) 2014-07-29 2018-12-12 Jnc株式会社 液晶組成物および液晶表示素子
IT201700073726A1 (it) 2017-06-30 2018-12-30 3V Sigma Spa Ammine impedite polimeriche
IT201700078234A1 (it) 2017-07-11 2019-01-11 3V Sigma Spa Ammine impedite
CN115322223A (zh) * 2022-07-29 2022-11-11 宿迁盛瑞新材料有限公司 一种新型磷酸酯类阻燃防老化助剂及其制备方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3640928A (en) * 1968-06-12 1972-02-08 Sankyo Co Stabilization of synthetic polymers

Also Published As

Publication number Publication date
NL154241C (fr) 1900-01-01
GB1390251A (en) 1975-04-09
NL7201259A (fr) 1972-08-01
GB1390252A (en) 1975-04-09
CH562792A5 (fr) 1975-06-13
DE2204659B2 (de) 1975-09-04
ZA72574B (en) 1972-10-25
BR7200471D0 (pt) 1973-05-24
FR2123501B1 (fr) 1976-03-05
US3840494A (en) 1974-10-08
AT317213B (de) 1974-08-26
CA997353A (en) 1976-09-21
AT320992B (de) 1975-03-10
ES399325A1 (es) 1975-06-01
SU470112A3 (ru) 1975-05-05
SU554817A3 (ru) 1977-04-15
AU470423B2 (en) 1973-08-02
DE2204659A1 (de) 1972-08-10
CA985831A (en) 1976-03-16
AU3848172A (en) 1973-08-02
FR2123501A1 (fr) 1972-09-08
NL154241B (nl) 1977-08-15
DD99994A5 (fr) 1973-09-05
IT954877B (it) 1973-09-15

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Legal Events

Date Code Title Description
RE20 Patent expired

Owner name: SANKYO CY LTD

Effective date: 19920128