TW418241B - Coating composition comprising a bicyclo-orspiro-orthoester functional compound - Google Patents

Coating composition comprising a bicyclo-orspiro-orthoester functional compound Download PDF

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Publication number
TW418241B
TW418241B TW86111273A TW86111273A TW418241B TW 418241 B TW418241 B TW 418241B TW 86111273 A TW86111273 A TW 86111273A TW 86111273 A TW86111273 A TW 86111273A TW 418241 B TW418241 B TW 418241B
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TW
Taiwan
Prior art keywords
group
groups
nitrogen
acid
branched
Prior art date
Application number
TW86111273A
Other languages
English (en)
Chinese (zh)
Inventor
Den Berg Keimpe Jan Van
Klaus Hobel
Huig Klinkenberg
Arie Noomen
Oorschot Josephus Christia Van
Original Assignee
Akzo Nobel Nv
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 Akzo Nobel Nv filed Critical Akzo Nobel Nv
Application granted granted Critical
Publication of TW418241B publication Critical patent/TW418241B/zh

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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D493/00Heterocyclic compounds containing oxygen atoms as the only ring hetero atoms in the condensed system
    • C07D493/02Heterocyclic compounds containing oxygen atoms as the only ring hetero atoms in the condensed system in which the condensed system contains two hetero rings
    • C07D493/08Bridged systems
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D305/00Heterocyclic compounds containing four-membered rings having one oxygen atom as the only ring hetero atoms
    • C07D305/02Heterocyclic compounds containing four-membered rings having one oxygen atom as the only ring hetero atoms not condensed with other rings
    • C07D305/04Heterocyclic compounds containing four-membered rings having one oxygen atom as the only ring hetero atoms not condensed with other rings having no double bonds between ring members or between ring members and non-ring members
    • C07D305/06Heterocyclic compounds containing four-membered rings having one oxygen atom as the only ring hetero atoms not condensed with other rings having no double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to the ring atoms
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D493/00Heterocyclic compounds containing oxygen atoms as the only ring hetero atoms in the condensed system
    • C07D493/02Heterocyclic compounds containing oxygen atoms as the only ring hetero atoms in the condensed system in which the condensed system contains two hetero rings
    • C07D493/10Spiro-condensed systems
    • 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
    • C08G18/30Low-molecular-weight 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
    • C08G63/00Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/91Polymers modified by chemical after-treatment
    • C08G63/914Polymers modified by chemical after-treatment derived from polycarboxylic acids and polyhydroxy compounds
    • C08G63/916Dicarboxylic acids and dihydroxy 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
    • C08G85/00General processes for preparing compounds provided for in this subclass
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D161/00Coating compositions based on condensation polymers of aldehydes or ketones; Coating compositions based on derivatives of such polymers
    • C09D161/20Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
    • C09D161/26Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds
    • C09D161/28Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds with melamine
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/31504Composite [nonstructural laminate]
    • Y10T428/31551Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Paints Or Removers (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Phenolic Resins Or Amino Resins (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
  • Polyethers (AREA)
  • Other Resins Obtained By Reactions Not Involving Carbon-To-Carbon Unsaturated Bonds (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
TW86111273A 1996-02-23 1997-08-06 Coating composition comprising a bicyclo-orspiro-orthoester functional compound TW418241B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL1002427A NL1002427C2 (nl) 1996-02-23 1996-02-23 Bekledingssamenstelling omvattende een bicyclo- of spiroorthoester functionele verbinding.

Publications (1)

Publication Number Publication Date
TW418241B true TW418241B (en) 2001-01-11

Family

ID=19762372

Family Applications (1)

Application Number Title Priority Date Filing Date
TW86111273A TW418241B (en) 1996-02-23 1997-08-06 Coating composition comprising a bicyclo-orspiro-orthoester functional compound

Country Status (22)

Country Link
US (2) US6297329B1 (OSRAM)
EP (2) EP0942051A3 (OSRAM)
JP (1) JP4001384B2 (OSRAM)
CN (1) CN1128851C (OSRAM)
AT (1) ATE195331T1 (OSRAM)
AU (2) AU733873B2 (OSRAM)
BR (1) BR9707735A (OSRAM)
CA (1) CA2247126A1 (OSRAM)
DE (1) DE69702748T2 (OSRAM)
DK (1) DK0882106T3 (OSRAM)
ES (1) ES2150758T3 (OSRAM)
GR (1) GR3034728T3 (OSRAM)
IN (1) IN208042B (OSRAM)
MX (1) MX202449B (OSRAM)
NL (1) NL1002427C2 (OSRAM)
NO (1) NO983859L (OSRAM)
PL (1) PL328460A1 (OSRAM)
PT (1) PT882106E (OSRAM)
RU (1) RU2180674C2 (OSRAM)
TW (1) TW418241B (OSRAM)
WO (1) WO1997031073A1 (OSRAM)
ZA (2) ZA971542B (OSRAM)

Families Citing this family (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1005499B1 (en) 1997-08-22 2004-12-29 Akzo Nobel Coatings International B.V. Coating composition comprising a compound comprising at least one bicyclo-orthoester group and at least one other functional group
KR100799453B1 (ko) * 2000-11-30 2008-01-30 아크조 노벨 엔.브이. 비시클로-오르토에스테르-작용기 화합물,이소시아네이트-작용기 화합물 및 티올-작용기 화합물을포함하는 코팅 조성물
US6548617B2 (en) 2000-11-30 2003-04-15 Akzo Nobel N.V. Coating composition comprising a bicyclo-orthoester-functional compound, an isocyanate-functional compound, and a thiol-functional compound
MXPA03006181A (es) * 2001-01-12 2004-12-03 Du Pont Composiciones reticulables polimericas que contienen espiroortocarbonatos.
CN100351393C (zh) * 2001-02-15 2007-11-28 宝生物工程株式会社 核苷酸多态性的检测方法
KR100871046B1 (ko) * 2001-06-01 2008-11-27 아크조 노벨 엔.브이. 폴리올, 폴리-카르복실산 및 모노카르복실산으로부터제조되는 폴리에스테르 올리고머와 폴리이소시아네이트를포함하는 코팅재 조성물
US7129290B2 (en) 2002-01-11 2006-10-31 E. I. Du Pont De Nemours And Company Polymeric crosslinkable compositions containing spiroorthocarbonates
CN1283683C (zh) 2002-10-01 2006-11-08 阿克佐诺贝尔国际涂料股份有限公司 包含含有螺-原硅酸酯基团的化合物的涂料组合物
KR20060002914A (ko) * 2003-04-04 2006-01-09 이 아이 듀폰 디 네모아 앤드 캄파니 아세탈 아미드기를 함유하는 중합체 가교성 조성물
WO2005017054A1 (en) * 2003-08-14 2005-02-24 Akzo Nobel Coatings International B.V. Paint comprising a liquid phase and an active powder phase
US7230112B2 (en) 2003-10-09 2007-06-12 E. I. Dupont De Nemours And Company Process for making amide acetals
JP4478430B2 (ja) * 2003-10-20 2010-06-09 ソニーケミカル&インフォメーションデバイス株式会社 光ディスク保護膜用組成物
TW200533692A (en) * 2003-11-06 2005-10-16 Showa Denko Kk Curable polyester having an oxetanyl group at end and process for preparing the same, resist composition, jet printing ink composition, curing methods and uses thereof
US7799386B2 (en) 2003-11-26 2010-09-21 Svenska Lantmannen Ek For Method for production of thermally cured coatings
US7071286B2 (en) 2003-12-02 2006-07-04 E. I. Dupont De Nemours And Company Coating compositions with high solids content for vehicle coating
DE10357713A1 (de) * 2003-12-09 2005-07-14 Bayer Materialscience Ag Beschichtungsmittel
DE102004003495A1 (de) * 2004-01-23 2005-08-11 Bayer Materialscience Ag Orthoestergruppenhaltige Bindemittel
US20050209433A1 (en) * 2004-03-22 2005-09-22 Barsotti Robert J Orthoester-protected polyols for low VOC coatings
WO2005092934A1 (en) * 2004-03-22 2005-10-06 E.I. Dupont De Nemours And Company Orthoester-protected polyols for low voc coatings
US7608645B2 (en) 2004-09-30 2009-10-27 E.I. Du Pont De Nemours And Company Dual cure coating compositions
US7504459B2 (en) 2004-09-30 2009-03-17 E.I. Du Pont De Nemours & Company Methacrylate amide acetals in coatings
US7135530B2 (en) * 2004-09-30 2006-11-14 E. I. Du Pont De Nemours And Company Polymeric/oligomeric methacrylate functionalized amide acetals in coatings
DE102004057224A1 (de) * 2004-11-26 2006-06-01 Bayer Materialscience Ag BOE-und/oder Polyorthoestergruppenhaltige Bindemittelgemische
DE102005016982A1 (de) * 2005-04-13 2006-10-19 Bayer Materialscience Ag Orthoestergruppenhaltige Bindemittel
EP1717254A1 (de) * 2005-04-29 2006-11-02 Sika Technology AG Feuchtigkeitshärtende Zusammensetzung mit erhöhter Dehnbarkeit
CN101243147B (zh) 2005-08-17 2011-05-11 阿克佐诺贝尔国际涂料股份有限公司 包含聚丙烯酸酯多元醇、聚酯多元醇和异氰酸酯官能交联剂的涂料组合物
US7812173B2 (en) 2005-08-23 2010-10-12 E.I. Du Pont De Nemours And Company Tetrahydro-1,8-dioxa-4a-aza-naphthalenes in coating applications
RU2425066C2 (ru) 2005-12-15 2011-07-27 Акцо Нобель Коатингс Интернэшнл Б.В. Многослойная покрывная система
US7875697B2 (en) * 2006-06-29 2011-01-25 Medtronic, Inc. Poly(orthoester) polymers, and methods of making and using same
US8568888B2 (en) * 2007-03-15 2013-10-29 Nanovere Technologies, Inc. Dendritic polyurethane coating
ES2625321T3 (es) 2008-10-22 2017-07-19 Akzo Nobel Coatings International B.V. Composición de revestimiento que comprende un poliisocianato y un poliol
AU2010230294A1 (en) 2009-03-31 2011-09-15 Akzo Nobel Coatings International B.V. Radiation curing of coatings
EP2269567A1 (en) * 2009-06-30 2011-01-05 Cognis IP Management GmbH Ester mixtures and compositions comprising such ester mixtures
EP2269566A1 (en) * 2009-06-30 2011-01-05 Cognis IP Management GmbH Ester mixtures and compositions comprising such ester mixtures
US8921430B2 (en) * 2009-06-30 2014-12-30 Cognis Ip Management Gmbh Ester mixtures and compositions comprising such ester mixtures
DE102009054071A1 (de) 2009-11-20 2011-05-26 Basf Coatings Gmbh Beschichtungsmittel mit guter Lagerbeständigkeit und daraus hergestellte Beschichtungen mit hoher Kratzfestigkeit bei gleichzeitig guter Witterungsbeständigkeit
JP5913938B2 (ja) 2011-11-30 2016-05-11 富士フイルム株式会社 光拡散性転写材料、光拡散層の形成方法、及び有機電界発光装置の製造方法
US20150017336A1 (en) 2012-03-07 2015-01-15 Akzo Nobel Coatings International B.V. Non-aqueous liquid coating composition
CN105246705A (zh) 2013-05-31 2016-01-13 凸版印刷株式会社 转印用层叠介质及印刷物
US10471758B2 (en) 2015-02-03 2019-11-12 Toppan Printing Co., Ltd. Optical information medium
KR20170138492A (ko) * 2015-04-20 2017-12-15 더 거번먼트 오브 더 유나이티드 스테이츠 오브 아메리카, 에즈 레프리젠티드 바이 더 세크러테리 오브 더 네이비 실란으로 말단 캡핑된 폴리아미드 수지
WO2017078193A1 (ko) * 2015-11-04 2017-05-11 (주) 개마텍 광경화 코팅용 조성물 및 코팅막
EP3462220B1 (en) 2016-05-16 2021-04-14 Toppan Printing Co., Ltd. Optical information medium and method for manufacturing same
EP3296339A1 (en) * 2016-09-14 2018-03-21 Henkel AG & Co. KGaA Thermoplastic pur with high tg for reaction transfer molding (rtm)

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3328427A (en) * 1963-10-31 1967-06-27 Celanese Corp Mono, ortho and oxetane esters of trimethylol compounds
DE1595673A1 (de) * 1966-08-25 1969-09-18 Bayer Ag Verfahren zur Herstellung von Polyadditions- und/oder Polykondensationsprodukten mit hexacyclischen Oxaspirangruppen
DE2938238A1 (de) 1979-09-21 1981-04-09 Siemens AG, 1000 Berlin und 8000 München Elektronischer drehstrom-elektrizitaetszaehler fuer das kondensatorumladungsverfahren
JPS5721417A (en) * 1980-07-16 1982-02-04 Toagosei Chem Ind Co Ltd Production of curing composition
JPS58189211A (ja) * 1982-04-30 1983-11-04 Toagosei Chem Ind Co Ltd スピロオルソエステル基を有する改質共重合体
JPS59164334A (ja) * 1983-03-10 1984-09-17 Toagosei Chem Ind Co Ltd 塗布または含浸用硬化性樹脂組成物
GB8322399D0 (en) 1983-08-19 1983-09-21 Ici Plc Coating compositions
JPS61195120A (ja) * 1985-02-25 1986-08-29 Toagosei Chem Ind Co Ltd 熱硬化用樹脂組成物
US4864055A (en) 1985-03-21 1989-09-05 Air Products And Chemicals, Inc. Self- and diol reactive formaldehyde-free crosslinking monomers and their derived polymers
KR930010741B1 (ko) * 1985-05-27 1993-11-10 닛뽕 뻬인또 가부시끼가이샤 관능성 중합체 및 그의 제조방법
US4788288A (en) 1985-07-30 1988-11-29 Air Products And Chemicals, Inc. Self-and Hydroxyl reactive formaldehyde-free cyclic hemiamidal and hemiamide ketal crosslinking monomers
FI863091L (fi) * 1985-07-30 1987-01-31 Wellcome Found Pesticida foereningar.
JPS62192415A (ja) * 1986-02-20 1987-08-24 Showa Denko Kk 自己架橋型熱硬化性樹脂
US4798745A (en) 1987-08-24 1989-01-17 Ppg Industries, Inc. Non-yellowing coating composition based on a hydroxy component and an anhydride component and utilization in a process of coating
US5155170A (en) 1990-11-09 1992-10-13 Akzo Coatings, Inc. Process for preparing low formaldehyde polyacetal containing coating
US5214086A (en) 1991-09-04 1993-05-25 Basf Corporation Coating compositions which may be ambient cured
SE468771B (sv) 1992-02-26 1993-03-15 Perstorp Ab Dendritisk makromolekyl av polyestertyp, foerfarande foer framstaellning daerav samt anvaendning daerav
PT575667E (pt) * 1992-06-26 2000-07-31 Procter & Gamble Processo para o fabrico de polimeros contendo grupos ortoester espiro os polimeros obtidos e a sua utilizacao
US5336807A (en) 1993-06-15 1994-08-09 Air Products & Chemicals, Inc. Crosslinking agents for coating and adhesive applications

Also Published As

Publication number Publication date
NO983859L (no) 1998-10-20
EP0942051A3 (en) 2009-01-14
MX202449B (en) 2001-06-15
CA2247126A1 (en) 1997-08-28
AU754919B2 (en) 2002-11-28
US20020161135A1 (en) 2002-10-31
ZA971542B (en) 1998-07-27
WO1997031073A1 (en) 1997-08-28
JP4001384B2 (ja) 2007-10-31
AU2093097A (en) 1997-09-10
PT882106E (pt) 2001-01-31
US6297329B1 (en) 2001-10-02
RU2180674C2 (ru) 2002-03-20
AU733873B2 (en) 2001-05-31
BR9707735A (pt) 1999-07-27
JP2000506908A (ja) 2000-06-06
CN1128851C (zh) 2003-11-26
EP0882106B1 (en) 2000-08-09
NL1002427C2 (nl) 1997-08-26
GR3034728T3 (en) 2001-01-31
MX9806845A (en) 1999-01-31
EP0882106A1 (en) 1998-12-09
IN208042B (OSRAM) 2007-08-03
NO983859D0 (no) 1998-08-21
US6593479B2 (en) 2003-07-15
ZA9711340B (en) 1998-08-26
DE69702748T2 (de) 2001-04-19
CN1214717A (zh) 1999-04-21
PL328460A1 (en) 1999-02-01
AU5651300A (en) 2001-02-15
EP0942051A2 (en) 1999-09-15
ES2150758T3 (es) 2000-12-01
DE69702748D1 (de) 2000-09-14
ATE195331T1 (de) 2000-08-15
DK0882106T3 (da) 2000-12-18
IN1997CH00954A (OSRAM) 2006-10-06

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