JPS55430B2 - - Google Patents

Info

Publication number
JPS55430B2
JPS55430B2 JP9162673A JP9162673A JPS55430B2 JP S55430 B2 JPS55430 B2 JP S55430B2 JP 9162673 A JP9162673 A JP 9162673A JP 9162673 A JP9162673 A JP 9162673A JP S55430 B2 JPS55430 B2 JP S55430B2
Authority
JP
Japan
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.)
Expired
Application number
JP9162673A
Other languages
Japanese (ja)
Other versions
JPS4994736A (en:Method
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 JPS4994736A publication Critical patent/JPS4994736A/ja
Publication of JPS55430B2 publication Critical patent/JPS55430B2/ja
Expired legal-status Critical Current

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
    • C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
    • C08G59/14—Polycondensates modified by chemical after-treatment
    • C08G59/1494—Polycondensates modified by chemical after-treatment followed by a further chemical treatment thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2/00—Processes of polymerisation
    • C08F2/46—Polymerisation initiated by wave energy or particle radiation
    • C08F2/48—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light
    • C08F2/50—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light with sensitising agents
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F20/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide or nitrile thereof
    • C08F20/02—Monocarboxylic acids having less than ten carbon atoms, Derivatives thereof
    • C08F20/10—Esters
    • C08F20/20—Esters of polyhydric alcohols or polyhydric phenols, e.g. 2-hydroxyethyl (meth)acrylate or glycerol mono-(meth)acrylate
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING 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
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/10—Printing inks based on artificial resins
    • C09D11/101—Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing
    • 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
    • Y10S525/00—Synthetic resins or natural rubbers -- part of the class 520 series
    • Y10S525/922—Polyepoxide polymer having been reacted to yield terminal ethylenic unsaturation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Materials Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • General Chemical & Material Sciences (AREA)
  • Paints Or Removers (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Macromonomer-Based Addition Polymer (AREA)
  • Polymerisation Methods In General (AREA)
  • Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)
JP9162673A 1972-09-18 1973-08-15 Expired JPS55430B2 (en:Method)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00290068A US3844916A (en) 1972-09-18 1972-09-18 Radiation curable non-gelled michael addition reaction products

Publications (2)

Publication Number Publication Date
JPS4994736A JPS4994736A (en:Method) 1974-09-09
JPS55430B2 true JPS55430B2 (en:Method) 1980-01-08

Family

ID=23114416

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9162673A Expired JPS55430B2 (en:Method) 1972-09-18 1973-08-15

Country Status (8)

Country Link
US (1) US3844916A (en:Method)
JP (1) JPS55430B2 (en:Method)
BE (1) BE804019A (en:Method)
CA (1) CA1016692A (en:Method)
DE (1) DE2346424C2 (en:Method)
FR (1) FR2200297B1 (en:Method)
GB (1) GB1448737A (en:Method)
NL (1) NL177684C (en:Method)

Families Citing this family (102)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4116787A (en) * 1975-11-06 1978-09-26 Desoto, Inc. Curable aqueous emulsions containing ethylenically unsaturated tertiary amines
US4127460A (en) * 1976-10-27 1978-11-28 Desoto, Inc. Radiation-curing aqueous coatings providing a nonadherent surface
US4147253A (en) * 1977-06-09 1979-04-03 Desoto, Inc. Supply package for wet-impregnated multifilament roving
US4219596A (en) * 1977-11-07 1980-08-26 Avery International Corporation Matrix free thin labels
US4284776A (en) * 1977-12-09 1981-08-18 Ppg Industries, Inc. Radiation curable Michael addition amine adducts of amide acrylate compounds
US4256560A (en) * 1978-08-28 1981-03-17 Ppg Industries, Inc. Curable resinous compositions useful in coating applications
US4316784A (en) * 1978-08-28 1982-02-23 Ppg Industries, Inc. Process for electrodeposition of Michael adducts of polymeric materials
US4248753A (en) * 1978-08-28 1981-02-03 Ppg Industries, Inc. Michael adducts of polymeric materials useful in coating applications
USRE31022E (en) * 1978-08-28 1982-08-31 Ppg Industries, Inc. Michael adducts of polymeric materials useful in coating applications
US4198331A (en) * 1978-08-28 1980-04-15 Ppg Industries, Inc. Resinous coating compositions curable by Michael adduct exchange
US4253899A (en) * 1979-03-08 1981-03-03 Avery International Corporation Method of making matrix free thin labels
DE2945549A1 (de) * 1979-11-10 1981-05-21 Röhm GmbH, 6100 Darmstadt Fluesiges, durch uv-strahlung haertbares ueberzugs- und bindemittel
DE3026823A1 (de) * 1980-07-16 1982-02-18 Basf Ag, 6700 Ludwigshafen Stickstoffbasische gruppen tragendes polyadditions/polykondensationsprodukt, verfahren zu dessen herstellung und dessen verwendung
US4459393A (en) * 1981-12-09 1984-07-10 Shell Oil Company Process for the preparation of self-linking resinous binders and their use in surface coating compositions
US5527368C1 (en) * 1983-03-11 2001-05-08 Norton Co Coated abrasives with rapidly curable adhesives
US4547562A (en) * 1984-03-26 1985-10-15 Gus Nichols Solventless polymeric composition comprising non arylamine, polyacrylate and epoxide
CA1262003A (en) * 1984-03-26 1989-09-26 Gus Nichols Solventless polymeric compositions
US4529765A (en) * 1984-04-09 1985-07-16 E. I. Du Pont De Nemours And Company Coating composition of an acrylic polymer having ethylenically unsaturated groups and an acrylic polymer having primary amine groups
EP0221956A1 (en) * 1985-05-22 1987-05-20 DeSoto, Inc. Acrylic acid esterification and photopolymerizable compositions containing the acrylated products
US6730244B1 (en) 1986-01-28 2004-05-04 Q2100, Inc. Plastic lens and method for the production thereof
US5415816A (en) 1986-01-28 1995-05-16 Q2100, Inc. Method for the production of plastic lenses
US6201037B1 (en) 1986-01-28 2001-03-13 Ophthalmic Research Group International, Inc. Plastic lens composition and method for the production thereof
DE3828400A1 (de) * 1988-08-20 1990-03-08 Basf Ag Strahlenvernetzbare haftklebegemische
US5492733A (en) * 1990-03-05 1996-02-20 International Paper Company High gloss ultraviolet curable coating
DE4225921A1 (de) * 1992-08-05 1994-02-10 Bayer Ag Aminoacrylate, ein Verfahren zu ihrer Herstellung und ihre Verwendung
US5565246A (en) * 1992-10-02 1996-10-15 Hyde; Timothy S. Method of forming heat-resistant raised print from radiation-curable solid particulate compositions
US5539012A (en) * 1993-08-18 1996-07-23 Loctite Corporation Fiber/resin composites and method of preparation
US5679719A (en) * 1993-03-24 1997-10-21 Loctite Corporation Method of preparing fiber/resin composites
US5565499A (en) * 1993-03-24 1996-10-15 Loctite Corporation Filament-winding compositions for fiber/resin composites
DE4415624A1 (de) * 1994-05-04 1995-11-09 Basf Ag Verfahren zur Herstellung von strahlungshärtbaren Acrylaten
DE4416624A1 (de) * 1994-05-11 1995-11-16 Bayer Ag Verfahren zur Herstellung von aminmodifizierten Epoxy(meth)acrylaten
EP0731121A3 (de) * 1995-03-09 1997-06-11 Basf Ag Aminomodifizierte Urethanacrylate
DE19520888A1 (de) * 1995-06-08 1996-12-12 Basf Ag Strahlungshärtbare Zusammensetzungen, enthaltend mehrfunktionelle Acrylate und verkappte Amine
DE19535936A1 (de) * 1995-09-27 1997-04-03 Basf Lacke & Farben Acryliertes Polyetherpolyol und dessen Verwendung für strahlenhärtbare Formulierungen
DE19545123C1 (de) * 1995-12-04 1997-02-13 Basf Lacke & Farben Strahlenhärtbare Überzugsmasse sowie deren Verwendung zur Beschichtung
US6022498A (en) * 1996-04-19 2000-02-08 Q2100, Inc. Methods for eyeglass lens curing using ultraviolet light
DE19616984A1 (de) 1996-04-27 1997-10-30 Basf Lacke & Farben Bindemittel sowie deren Verwendung in strahlenhärtbaren Beschichtungsmitteln
US6280171B1 (en) 1996-06-14 2001-08-28 Q2100, Inc. El apparatus for eyeglass lens curing using ultraviolet light
DE19826716B8 (de) * 1997-07-18 2010-06-10 Basf Se Verfahren zur Herstellung von strahlengehärteten Beschichtungen mit verbesserter Elastizität und hiermit beschichtete Substrate
US6517343B2 (en) 1997-09-26 2003-02-11 Arizona Chemical Company Coated candles and coating compositions
AUPP922599A0 (en) * 1999-03-17 1999-04-15 Bolton, Robert John Radiation curable compositions
DE19933741A1 (de) * 1999-07-19 2001-01-25 Basf Ag Verfahren zur Haftungsverbesserung von Acrylatharzen
SE520406C2 (sv) * 2000-09-13 2003-07-08 Perstorp Specialty Chem Ab Strålningshärdbar dendritisk oligomer eller polymer
CN1476426A (zh) * 2000-10-20 2004-02-18 Ucb公司 二甲胺/酯加合物和它们在可聚合物组合物中的用途
KR20050029228A (ko) * 2002-07-19 2005-03-24 시바 스페셜티 케미칼스 홀딩 인크. 신규한 이관능성 광개시제
US20060062922A1 (en) * 2004-09-23 2006-03-23 Molecular Imprints, Inc. Polymerization technique to attenuate oxygen inhibition of solidification of liquids and composition therefor
ITVA20050032A1 (it) * 2005-05-13 2006-11-14 Lamberti Spa Esteri fenilgliossilici generanti residui a bassa migrabilita' e odore
EP1876166A1 (en) * 2006-06-29 2008-01-09 Cytec Surface Specialties, S.A. Radiation curable amino(meth)acrylates
WO2009119588A1 (ja) * 2008-03-24 2009-10-01 アイカ工業株式会社 樹脂組成物、ハードコート剤、フィルム、及び成型体の製造方法
JP5570529B2 (ja) 2009-01-08 2014-08-13 ビーエーエスエフ ソシエタス・ヨーロピア 重合開始剤
US8604251B2 (en) 2009-03-24 2013-12-10 Basf Se Oligofunctional photoinitiators
US8940806B2 (en) 2009-03-30 2015-01-27 Basf Se Polymerizable compositions
EP2459519B1 (en) 2009-07-30 2017-11-29 Basf Se Macrophotoinitiators
JP2011068783A (ja) 2009-09-25 2011-04-07 Fujifilm Corp インク組成物、及び、インクジェット記録方法
DE102010044204A1 (de) 2009-11-25 2011-05-26 Basf Se Verfahren zur Herstellung von strahlungshärtbaren (Meth)Acrylaten
DE102010044206A1 (de) 2009-11-25 2011-05-26 Basf Se Verfahren zur Herstellung von strahlungshärtbaren (Meth)Acrylaten
EP2383254A1 (en) * 2010-04-19 2011-11-02 Cytec Surface Specialties, S.A. Radiation curable amino(meth)acrylates
US9358576B2 (en) 2010-11-05 2016-06-07 International Paper Company Packaging material having moisture barrier and methods for preparing same
US9365980B2 (en) 2010-11-05 2016-06-14 International Paper Company Packaging material having moisture barrier and methods for preparing same
JP5882756B2 (ja) * 2011-09-01 2016-03-09 リケンテクノス株式会社 活性エネルギー線硬化性樹脂組成物
US9365685B2 (en) 2012-02-28 2016-06-14 Ut-Battelle, Llc Method of improving adhesion of carbon fibers with a polymeric matrix
ITVA20120010A1 (it) 2012-05-03 2013-11-04 Lamberti Spa Alfa-dichetoni per fotopolimerizzazioni tramite led
EP2909165B1 (en) 2012-10-19 2018-05-30 IGM Group B.V. Hybrid photoinitiators
ITVA20120041A1 (it) 2012-10-22 2014-04-23 Lamberti Spa 3-chetocumarine per fotopolimerizzazioni tramite led
EP2912023B1 (en) 2012-10-23 2017-01-11 Basf Se Iminoxytriazines as radical generators
WO2014083644A1 (ja) * 2012-11-28 2014-06-05 リケンテクノス株式会社 活性エネルギー線硬化性樹脂組成物
JP6161089B2 (ja) 2012-12-18 2017-07-12 ビーエーエスエフ ソシエタス・ヨーロピアＢａｓｆ Ｓｅ ナフタレンジイミド−ビニレン−オリゴチオフェン−ビニレンポリマーに基づく半導体材料
JP6400021B2 (ja) 2012-12-19 2018-10-03 ビーエーエスエフ ソシエタス・ヨーロピアＢａｓｆ Ｓｅ ビスアシルホスフィン酸の誘導体、その製造および光開始剤としての使用
KR102257105B1 (ko) 2013-07-08 2021-05-28 아이지엠 그룹 비.브이. 액체 비스아실포스핀 옥시드 광개시제
CN107001400B (zh) 2014-05-30 2019-08-27 意大利艾坚蒙树脂有限公司 多官能酰基氧化膦光引发剂
CN107073759B (zh) 2014-11-04 2019-12-20 蓝宝迪有限公司 可光固化组合物
WO2016186838A1 (en) 2015-05-15 2016-11-24 Sun Chemical Corporation Energy curable inkjet inks and coating compositions
US10633553B2 (en) 2015-10-16 2020-04-28 Basf Se Energy curable high reactivity multi vinylether or acrylate functional resins
US11161925B2 (en) 2015-12-02 2021-11-02 Sun Chemical Corporation Polymeric aminoacrylates
WO2017160784A1 (en) 2016-03-18 2017-09-21 Sun Chemical Corporation Energy curable compositions comprising polymeric aminoacrylates
KR102531022B1 (ko) * 2017-01-11 2023-05-11 동우 화인켐 주식회사 접착제 조성물 및 이를 이용한 광학 적층체
JP6924260B2 (ja) 2017-04-26 2021-08-25 富士フイルム株式会社 光硬化性インク組成物、及び、画像形成方法
CN111065632B (zh) 2017-08-09 2023-07-28 Igm集团有限公司 多功能聚合物光引发剂
CN111032747A (zh) * 2017-08-24 2020-04-17 毕克化学有限公司 包含碳纤维和添加剂的组合物
KR102707251B1 (ko) 2017-12-11 2024-09-13 아이지엠 레진스 이탈리아 에스.알.엘. 벤졸-쿠마린 중합성 광개시제
WO2019116177A1 (en) 2017-12-14 2019-06-20 Igm Resins Italia S.R.L. Water soluble 3-ketocoumarins
EP3539969A1 (en) 2018-03-14 2019-09-18 ETH Zurich Novel photo-initiators and their application
EP3539924A1 (en) 2018-03-14 2019-09-18 ETH Zurich Novel vinyl phosphines and photo-initiators obtainable therefrom
KR102824944B1 (ko) 2018-09-07 2025-06-24 아이지엠 레진스 이탈리아 에스.알.엘. 다관능성 비스아실포스핀 옥사이드 광개시제
WO2020089189A1 (en) 2018-11-02 2020-05-07 Elantas Europe Gmbh Dual cure composition
EP3902878A1 (en) 2018-12-28 2021-11-03 IGM Resins Italia S.r.l. Photoinitiators
EP4041719A1 (en) 2019-10-11 2022-08-17 IGM Resins Italia S.r.l. Coumarin glyoxylates for led photocuring
IT202000023815A1 (it) 2020-10-09 2022-04-09 Igm Resins Italia Srl Ketoquinolones as photonitiators
IT202100014885A1 (it) 2021-06-08 2022-12-08 Igm Resins Italia Srl Fotoiniziatori a base di silicio bifunzionali
IT202100025868A1 (it) 2021-10-08 2023-04-08 Igm Resins Italia Srl Nuovi fotoiniziatori
US20250145766A1 (en) 2022-02-24 2025-05-08 Igm Resins Italia S.R.L. Photoinitiators
US20250297109A1 (en) 2022-05-06 2025-09-25 Igm Group B. V. Photoinitiator package comprising phosphine oxide photoinitiators, oxazole-based sensitizers and amine additives
CA3256596A1 (en) 2022-05-06 2023-11-09 Igm Group B. V. SET OF PHOTOINITIATORS INCLUDING PHOSPHINE OXIDE-BASED PHOTOINITIATORS, COUMARIN-BASED SENSITIZERS, AND AMINE ADDITIVES
EP4273200A1 (en) 2022-05-06 2023-11-08 IGM Group B.V. Photoinitiator package comprising specialised bisacylphosphine oxide photoinitiators and optical brightener sensitizers
EP4549475A1 (en) * 2022-06-29 2025-05-07 Toray Industries, Inc. Active energy ray-curable composition, active energy ray-curable ink, and printed object production method
WO2024074945A1 (en) 2022-10-05 2024-04-11 Igm Resins Italia S.R.L. Polymeric (meth)acrylate photoinitiators
IT202300004737A1 (it) 2023-03-14 2024-09-14 Igm Resins Italia Srl Uso di fotoiniziatori specifici in un processo di fotopolimerizzazione utilizzando lunghezze d’onda combinate di luce a led
WO2025027517A1 (en) 2023-08-03 2025-02-06 Igm Resins Italia S.R.L. 10,11 -dihydro-5h-dibenzo[b,f]azepine derivatives as photoinitiatiors in photopolymerisation for use in photocurable compositions
EP4534614A1 (en) 2023-10-02 2025-04-09 IGM Group B.V. Photoinitiator package comprising specialised bisacylphosphine oxide photoinitiators, further acylphosphine oxide photoinitiators and optical brightener sensitizers
WO2025140854A2 (en) 2023-12-28 2025-07-03 Igm Resins Italia S.R.L. NOVEL SOLID FORM OF BIS(2,4,6-TRIMETHYLBENZOYL)-n-OCTYL-PHOSPHINE OXIDE
EP4578918A1 (en) 2023-12-29 2025-07-02 IGM Group B.V. Photosensitizers for photopolymerization
EP4579344A1 (en) 2023-12-29 2025-07-02 IGM Group B.V. Thioalkylcoumarin photosensitizers for photopolymerization

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3450613A (en) * 1964-03-09 1969-06-17 Bausch & Lomb Epoxy adhesive containing acrylic acid-epoxy reaction products and photosensitizers
US3495987A (en) * 1965-09-03 1970-02-17 Du Pont Photopolymerizable products
US3759807A (en) * 1969-01-28 1973-09-18 Union Carbide Corp Photopolymerization process using combination of organic carbonyls and amines
DE2057252B2 (de) * 1970-11-21 1979-04-05 Basf Ag, 6700 Ludwigshafen Verfahren zur Herstellung von Überzügen

Also Published As

Publication number Publication date
JPS4994736A (en:Method) 1974-09-09
DE2346424C2 (de) 1985-12-19
FR2200297B1 (en:Method) 1980-01-11
BE804019A (fr) 1973-12-17
DE2346424A1 (de) 1974-04-11
NL177684C (nl) 1985-11-01
US3844916A (en) 1974-10-29
FR2200297A1 (en:Method) 1974-04-19
GB1448737A (en) 1976-09-08
NL7312860A (en:Method) 1974-03-20
CA1016692A (en) 1977-08-30

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