WO2011069943A1 - Uv-led curable compositions and inks - Google Patents
Uv-led curable compositions and inks Download PDFInfo
- Publication number
- WO2011069943A1 WO2011069943A1 PCT/EP2010/068931 EP2010068931W WO2011069943A1 WO 2011069943 A1 WO2011069943 A1 WO 2011069943A1 EP 2010068931 W EP2010068931 W EP 2010068931W WO 2011069943 A1 WO2011069943 A1 WO 2011069943A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- group
- radiation curable
- curable composition
- photoinitiator
- composition according
- Prior art date
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- 235000010724 Wisteria floribunda Nutrition 0.000 description 1
- GTRUFDJLNSXNFD-UHFFFAOYSA-N [6-benzoyl-9-(2-ethylhexyl)carbazol-3-yl]-phenylmethanone Chemical compound C=1C=C2N(CC(CC)CCCC)C3=CC=C(C(=O)C=4C=CC=CC=4)C=C3C2=CC=1C(=O)C1=CC=CC=C1 GTRUFDJLNSXNFD-UHFFFAOYSA-N 0.000 description 1
- LWVMJAAHYZHLJF-UHFFFAOYSA-N [9-(2-ethylhexyl)-6-(3-methoxybenzoyl)carbazol-3-yl]-(3-methoxyphenyl)methanone Chemical compound C=1C=C2N(CC(CC)CCCC)C3=CC=C(C(=O)C=4C=C(OC)C=CC=4)C=C3C2=CC=1C(=O)C1=CC=CC(OC)=C1 LWVMJAAHYZHLJF-UHFFFAOYSA-N 0.000 description 1
- WETWJCDKMRHUPV-UHFFFAOYSA-N acetyl chloride Chemical compound CC(Cl)=O WETWJCDKMRHUPV-UHFFFAOYSA-N 0.000 description 1
- 239000012346 acetyl chloride Substances 0.000 description 1
- 230000010933 acylation Effects 0.000 description 1
- 238000005917 acylation reaction Methods 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 230000029936 alkylation Effects 0.000 description 1
- 238000005804 alkylation reaction Methods 0.000 description 1
- RWZYAGGXGHYGMB-UHFFFAOYSA-N anthranilic acid Chemical class NC1=CC=CC=C1C(O)=O RWZYAGGXGHYGMB-UHFFFAOYSA-N 0.000 description 1
- 150000004982 aromatic amines Chemical class 0.000 description 1
- IRERQBUNZFJFGC-UHFFFAOYSA-L azure blue Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[S-]S[S-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] IRERQBUNZFJFGC-UHFFFAOYSA-L 0.000 description 1
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 1
- 239000012965 benzophenone Substances 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- AMLYRCOEFHJSFS-UHFFFAOYSA-N carbazol-1-one Chemical class C1=CC=C2C3=CC=CC(=O)C3=NC2=C1 AMLYRCOEFHJSFS-UHFFFAOYSA-N 0.000 description 1
- 150000001716 carbazoles Chemical class 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- PBAYDYUZOSNJGU-UHFFFAOYSA-N chelidonic acid Natural products OC(=O)C1=CC(=O)C=C(C(O)=O)O1 PBAYDYUZOSNJGU-UHFFFAOYSA-N 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 229960002887 deanol Drugs 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 125000004985 dialkyl amino alkyl group Chemical group 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 229940113088 dimethylacetamide Drugs 0.000 description 1
- 239000012972 dimethylethanolamine Substances 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- GTPROMYYPGDANE-UHFFFAOYSA-N ethenoxyethene;prop-2-enoic acid Chemical class C=COC=C.OC(=O)C=C GTPROMYYPGDANE-UHFFFAOYSA-N 0.000 description 1
- GOSGMXCNUMIIIP-UHFFFAOYSA-N ethyl 2-[6-benzoyl-9-(2-ethylhexyl)carbazol-3-yl]-2-oxoacetate Chemical compound C=1C=C2N(CC(CC)CCCC)C3=CC=C(C(=O)C(=O)OCC)C=C3C2=CC=1C(=O)C1=CC=CC=C1 GOSGMXCNUMIIIP-UHFFFAOYSA-N 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- UCNNJGDEJXIUCC-UHFFFAOYSA-L hydroxy(oxo)iron;iron Chemical compound [Fe].O[Fe]=O.O[Fe]=O UCNNJGDEJXIUCC-UHFFFAOYSA-L 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- DCYOBGZUOMKFPA-UHFFFAOYSA-N iron(2+);iron(3+);octadecacyanide Chemical compound [Fe+2].[Fe+2].[Fe+2].[Fe+3].[Fe+3].[Fe+3].[Fe+3].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] DCYOBGZUOMKFPA-UHFFFAOYSA-N 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 239000004611 light stabiliser Substances 0.000 description 1
- 238000004895 liquid chromatography mass spectrometry Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- CRVGTESFCCXCTH-UHFFFAOYSA-N methyl diethanolamine Chemical compound OCCN(C)CCO CRVGTESFCCXCTH-UHFFFAOYSA-N 0.000 description 1
- 238000007040 multi-step synthesis reaction Methods 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000001971 neopentyl group Chemical group [H]C([*])([H])C(C([H])([H])[H])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- NWVVVBRKAWDGAB-UHFFFAOYSA-N p-methoxyphenol Chemical compound COC1=CC=C(O)C=C1 NWVVVBRKAWDGAB-UHFFFAOYSA-N 0.000 description 1
- LXTZRIBXKVRLOA-UHFFFAOYSA-N padimate a Chemical compound CCCCCOC(=O)C1=CC=C(N(C)C)C=C1 LXTZRIBXKVRLOA-UHFFFAOYSA-N 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 230000036211 photosensitivity Effects 0.000 description 1
- FSDNTQSJGHSJBG-UHFFFAOYSA-N piperidine-4-carbonitrile Chemical compound N#CC1CCNCC1 FSDNTQSJGHSJBG-UHFFFAOYSA-N 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002952 polymeric resin Substances 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- KCTAWXVAICEBSD-UHFFFAOYSA-N prop-2-enoyloxy prop-2-eneperoxoate Chemical compound C=CC(=O)OOOC(=O)C=C KCTAWXVAICEBSD-UHFFFAOYSA-N 0.000 description 1
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 description 1
- 229960003351 prussian blue Drugs 0.000 description 1
- 239000013225 prussian blue Substances 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 229940079877 pyrogallol Drugs 0.000 description 1
- FYNROBRQIVCIQF-UHFFFAOYSA-N pyrrolo[3,2-b]pyrrole-5,6-dione Chemical compound C1=CN=C2C(=O)C(=O)N=C21 FYNROBRQIVCIQF-UHFFFAOYSA-N 0.000 description 1
- 238000010526 radical polymerization reaction Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000001235 sensitizing effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000011877 solvent mixture Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 150000003510 tertiary aliphatic amines Chemical class 0.000 description 1
- JRMUNVKIHCOMHV-UHFFFAOYSA-M tetrabutylammonium bromide Chemical compound [Br-].CCCC[N+](CCCC)(CCCC)CCCC JRMUNVKIHCOMHV-UHFFFAOYSA-M 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 229960004418 trolamine Drugs 0.000 description 1
- 235000013799 ultramarine blue Nutrition 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/027—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds
- G03F7/028—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with photosensitivity-increasing substances, e.g. photoinitiators
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/027—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds
Definitions
- the present invention relates to radiation curable compositions suitable for UV LED curing, comprising at least one specific carbazole based initiator and an amine coinitiator.
- Photoinitiators are frequently used in polymerizable compositions, such as UV-curable inks, to initiate the polymerization of monomers when exposed to UV radiation.
- Bathochromic photoinitiators absorbing in the region between 365 nm and 395 nm, are required to make full use of the recent development of UV-LEDs with increasing power.
- Thioxanthones and acyl phosphine oxides are photoinitiators absorbing in this spectral region.
- Thioxanthones are prone to yellowing upon exposure, thereby forming degradation products with a limited stability. As a result, the original yellowing shifts upon storage. Especially in imaging, e.g. inkjet printing, this unstable yellowing behaviour makes control of the image tone in the final image difficult. On top of that, certain applications, predominantly packaging applications, prefer thioxanthone free radiation curable compositions.
- JP 2005 1 13043 discloses a cationically UV curable Inkjet ink composition containing an aliphatic tertiary amine and N-ethyl-3,6- bis(benzoyl)-carbazole photinitiator. JP 2005 1 13043 (KONICA) is silent on free radical UV curable inkjet ink compositions.
- JP 2006 162784 discloses a photosensitive colored composition including a photopolymerization initiator, a
- EP 1395615 (CIBA) AND EP 1567518 (CIBA) disclose UV curable compositions including oxime ester compounds as the
- compositions having a much more stable yellowing behaviour and without generating medium volatile degradation products, as defined by claim 1.
- alkyl means all variants possible for each number of carbon atoms in the alkyl group i.e. for three carbon atoms: n-propyl and isopropyl; for four carbon atoms: n-butyl, isobutyl and tertiary-butyl; for five carbon atoms: n-pentyl, 1 , -dimethyl-propyl, 2,2-dimethylpropyl and 2- methyl-butyl etc.
- the radiation curable composition according to present invention includes at least one co-initiator selected from the group consisting of an aliphatic tertiary amine and a dialkyl aniline derivative; and at least one
- R1 and R2 are independently selected from the group consisting of a substituted or unsubstituted aromatic or heteroaromatic group and a substituent according to Formula (II):
- R3 is selected from the group consisting of hydrogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted alkaryl group and a substituted or unsubstituted aryl or heteroaryl group;
- S1 and S2 are independently selected from the group consisting of hydrogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted alkaryl group and a substituted or unsubstituted aryl or heteroaryl group, a halogen, an alcohol, an alkoxy group, a thiol, a thioalkoxy group, an ester, an amide, an amine and a carboxylic acid;
- Y represents O or NR5
- R4 and R5 are selected from the group consisting of hydrogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted alkaryl group and a substituted or unsubstituted aryl or heteroaryl group;
- n and m independently represent an integer from 1 to 3;
- X and Z represent O.
- R1 and R2 are represented by a substituent according to general formula II.
- Si and S2 represent hydrogen.
- R3 represents a substituted or unsubstituted alkyl group, a branched alkyl group being particularly preferred.
- the photoinitiator is a diffusion hindered photoinitiator selected from the group consisting of a polymerizable photoinitiator, a multifunctional photoinitiator and a polymeric or an oligomeric photoinitiator.
- the photoinitiator according to general structure I comprises at least one polymerizable ethylenically unsaturated group, preferably selected from the group consisting of an acrylate, a methacrylate, an acrylamide a methacrylamide, a styrene, a maleimide, a vinyl ester, a vinyl ether, an allyl ether and an allyl ester, an acrylate and a methacrylate being more preferred and an acrylate being particularly preferred.
- at least one of R1 to R3 is substituted with at least one polymerizable ethylenically unsaturated group, preferably an acrylate or a methacrylate, an acrylate being particularly preferred.
- one of the groups selected from R1 to R3 and Si and S 2 is linked to a polymer, a star polymer, a dendritic polymer and a hyperbranched polymer being particularly preferred, polyethers and polyesters being most preferred.
- the photoinitiator is preferably a so-called diffusion hindered photoinitiator.
- a diffusion hindered photoinitiator is a photoinitiator which exhibits a much lower mobility in a cured layer of the curable liquid or ink than a
- monofunctional photoinitiator such as benzophenone.
- Several methods can be used to lower the mobility of the photoinitiator.
- One way is to increase the molecular weight of the photoinitiator so that the diffusion speed is reduced, e.g. polymeric photoinitiators.
- Another way is to increase its reactivity so that it is built into the polymerizing network, e.g. multifunctional photoinitiators and polymerizable photoinitiators.
- the diffusion hindered photoinitiator is preferably selected from the group consisting of non-polymeric multifunctional photoinitiators, polymeric photoinitiators and polymerizable photoinitiators.
- multifunctional photoinitiators are considered to have a molecular weight between 300 and 900 Dalton.
- Non-polymerizable monofunctional photoinitiators with a molecular weight in that range are not diffusion hindered photoinitiators. Most preferably the diffusion hindered
- photoinitiator is a polymerizable initiator.
- Suitable polymerizable photoinitiators according to Formula (I) are given by Table 2 without being limited thereto.
- Suitable multifunctional photoinitiators according to Formula (I) are given by Table 3, without being limited thereto.
- Suitable polymeric photoinitiators according to Formula (I) are given by Table 4, without being limited thereto. A specific degree of substitution is given for the sake of clarity.
- a preferred amount of photoinitiator is 0.1 - 50 wt%, more preferably 0.1 -
- composition contains a co-initiator.
- co-initiators can be categorized in 3 groups:
- aromatic amines such as amylparadimethylaminobenzoate, 2-n- butoxyethyl-4-(dimethylamino) benzoate, 2-(dimethylamino)ethylbenzoate, ethyl-4-(dimethylamino)benzoate, and 2-ethylhexyl-4- (dimethylamino)benzoate; and
- (meth)acrylated amines such as dialkylamino alkyl(meth)acrylates (e.g., diethylaminoethylacrylate) or N-morpholinoalkyl-(meth)acrylates (e.g., N-morpholinoethyl-acrylate).
- dialkylamino alkyl(meth)acrylates e.g., diethylaminoethylacrylate
- N-morpholinoalkyl-(meth)acrylates e.g., N-morpholinoethyl-acrylate
- the preferred co-initiators are aminobenzoates.
- composition according to the present invention are preferably diffusion hindered for safety reasons, in particular for food packaging applications.
- a diffusion hindered co-initiator is preferably selected from the group
- the diffusion hindered co-initiator is selected from the group consisting of polymeric co-initiators and polymerizable co-initiators. Most preferably the diffusion hindered co-initiator is a polymerizable co-initiator having at least one (meth)acrylate group, more preferably having at least one acrylate group.
- Preferred diffusion hindered co-initiators are the polymerizable co-initiators disclosed in EP 2053101 A (AGFA GRAPHICS) in paragraphs [0088] and [0097].
- Preferred diffusion hindered co-initiators include a polymeric co-initiator having a dendritic polymeric architecture, more preferably a
- hyperbranched polymeric architecture Preferred hyperbranched polymeric co-initiators are those disclosed in US 2006014848 (AGFA) incorporated herein as a specific reference.
- the curable pigment dispersion or ink preferably comprises the diffusion hindered co-initiator in an amount of 0.1 to 50 wt%, more preferably in an amount of 0.5 to 25 wt%, most preferably in an amount of 1 to 10 wt% of the total weight of the ink.
- the radiation curable composition according to the present invention can be used to prevent unstable yellowing behaviour in an image upon storage, e.g. an inkjet image.
- the radiation curable composition is a radiation curable inkjet ink, especially an inkjet ink curable by UV LEDs emitting in the spectral region of 365 nm to 395 nm. Due to their compactness, UV LEDs can be built into inkjet printers more easily than other UV light sources such as doped mercury lamps.
- the radiation curable inkjet ink is part of an inkjet ink set, preferably an inkjet ink set including two or more inkjet inks in accordance with the invention.
- the radiation curable inkjet ink form preferably part of a CMY(K) inkjet ink set.
- the CMY(K) inkjet ink set may also be extended with extra inks such as red, green, blue, violet and/or orange to further enlarge the colour gamut of the image.
- the CMY(K) ink set may also be extended by the combination of full density and light density inks of both colour inks and/or black inks to improve the image quality by lowered graininess.
- the inkjet ink can be advantageously used in an inkjet printing method comprising the steps:
- the radiation curable composition according to the present invention may further also contain at least one surfactant to control the homogenous spreading of the pigment dispersion on a substrate.
- the surfactant is important to control the dot size of the ink droplet on a substrate.
- the viscosity of a radiation curable inkjet ink is preferably lower than 30 mPa.s, more preferably lower than 5 mPa.s, and most preferably between 2 and 10 mPa.s at a shear rate of 100 s and a jetting
- the radiation curable composition according to the present invention is preferably prepared according to a method comprising the steps of:
- composition b) adding to said composition at least one co-initiator selected from the group consisting of an aliphatic tertiary amine and a dialkyl aniline derivative; and at least one photoinitiator according to Formula (I).
- co-initiator selected from the group consisting of an aliphatic tertiary amine and a dialkyl aniline derivative; and at least one photoinitiator according to Formula (I).
- the monomers and oligomers used in radiation curable compositions and inks, especially for food packaging applications are preferably purified compounds having no or almost no impurities, more particularly no toxic or carcinogenic impurities.
- the impurities are usually derivative compounds obtained during synthesis of the polymerizable compound. Sometimes, however, some compounds may be added deliberately to pure
- Any monomer or oligomer capable of free radical polymerization may be used as polymerizable compound.
- a combination of monomers, oligomers and/or prepolymers may also be used.
- the monomers, oligomers and/or prepolymers may possess different degrees of functionality, and a mixture including combinations of mono-, di-, tri-and higher functionality
- monomers, oligomers and/or prepolymers may be used.
- the viscosity of the radiation curable compositions and inks can be adjusted by varying the ratio between the monomers and oligomers.
- Particularly preferred monomers and oligomers are those listed in [0106] to [01 15] in EP 191 1814 A (AGFA GRAPHICS) incorporated herein as a specific reference.
- a preferred class of monomers and oligomers are vinyl ether acrylates such as those described in US 63101 15 (AGFA) , incorporated herein by reference. Particularly preferred compounds are 2- (2-vinyloxyethoxy)ethyl (meth)acrylate, most preferably the compound is 2- (2-vinyloxyethoxy)ethyl a cry late.
- Colorants used in the radiation curable compositions and inks may be any colorants used in the radiation curable compositions and inks.
- the colorant is preferably a pigment or a
- polymeric dye most preferably a pigment.
- the pigments may be black, white, cyan, magenta, yellow, red, orange, violet, blue, green, brown, mixtures thereof, and the like.
- This colour pigment may be chosen from those disclosed by HERBST, Willy, et al. Industrial Organic Pigments, Production, Properties, Applications. 3rd edition. Wiley - VCH , 2004. ISBN 3527305769.
- Suitable pigments include mixed crystals of the above particular preferred pigments.
- Mixed crystals are also referred to as solid solutions.
- different quinacridones mix with each other to form solid solutions, which are quite different from both physical mixtures of the compounds and from the compounds themselves.
- the molecules of the components enter into the same crystal lattice, usually, but not always, that of one of the components.
- the x-ray diffraction pattern of the resulting crystalline solid is characteristic of that solid and can be clearly differentiated from the pattern of a physical mixture of the same components in the same proportion. In such physical mixtures, the x-ray pattern of each of the components can be
- mixtures of pigments may be used in the UV curable inks.
- a neutral black inkjet ink is preferred and can be obtained, for example, by mixing a black pigment and a cyan pigment into the ink.
- the inkjet application may also require one or more spot colours, for example for packaging inkjet printing or textile inkjet printing. Silver and gold are often desired colours for inkjet poster printing and point-of-sales displays.
- Non-organic pigments may be used in the radiation curable compositions and inks.
- Particular preferred pigments are C.I. Pigment Metal 1 , 2 and 3.
- Illustrative examples of the inorganic pigments include red iron oxide (III), cadmium red, ultramarine blue, prussian blue, chromium oxide green, cobalt green, amber, titanium black and synthetic iron black.
- Pigment particles in inkjet inks should be sufficiently small to permit free flow of the ink through the inkjet-printing device, especially at the ejecting nozzles. It is also desirable to use small particles for maximum colour strength and to slow down sedimentation.
- the numeric average pigment particle size is preferably between 0.050 and 1 pm, more preferably between 0.070 and 0.300 pm and particularly preferably between 0.080 and 0.200 pm. Most preferably, the numeric average pigment particle size is no larger than 0.150 pm. An average particle size smaller than 0.050 pm is less desirable for decreased light- fastness, but mainly also because very small pigment particles or individual pigment molecules thereof may still be extracted in food packaging applications.
- the average particle size of pigment particles is determined with a Nicomp 30 Submicron Particle Analyzer based upon the principle of dynamic light scattering. The ink is diluted with ethyl acetate to a pigment concentration of 0.002 wt%.
- the numeric average particle diameter of the white pigment is preferably from 50 to 500 nm, more preferably from 150 to 400 nm, and most preferably from 200 to 350 nm. Sufficient hiding power cannot be obtained when the average diameter is less than 50 nm, and the storage ability and the jet-out suitability of the ink tend to be degraded when the average diameter exceeds 500 nm.
- the determination of the numeric average particle diameter is best performed by photon correlation spectroscopy at a wavelength of 633 nm with a 4mW HeNe laser on a diluted sample of the pigmented inkjet ink.
- a suitable particle size analyzer used was a MalvernTM nano-S available from Goffin-Meyvis.
- a sample can, for example, be prepared by addition of one drop of ink to a cuvet containing 1 .5 ml_ ethyl acetate and mixed until a homogenous sample was obtained.
- the measured particle size is the average value of 3 consecutive measurements consisting of 6 runs of 20 seconds.
- Suitable white pigments are given by Table 2 in [01 16] of WO
- the white pigment is preferably a pigment with a refractive index greater than 1.60.
- the white pigments may be employed singly or in combination.
- titanium dioxide is used as pigment with a refractive index greater than 1.60.
- Suitable titanium dioxide pigments are those disclosed in [01 17] and in [01 18] of WO 2008/074548 (AGFA GRAPHICS) .
- the pigments are present in the range of 0.01 to 10 % by weight,
- the white pigment is preferably present in an amount of 3% to 30% by weight of the ink composition, and more preferably 5% to 25%. An amount of less than 3% by weight cannot achieve sufficient covering power and usually exhibits very poor storage stability and ejection property.
- pigments are stabilized in the dispersion medium by dispersing agents, such as polymeric dispersants.
- dispersing agents such as polymeric dispersants.
- the surface of the pigments can be modified to obtain so-called “self-dispersible” or
- the dispersant is preferably a polymeric dispersant.
- Typical polymeric dispersants are copolymers of two monomers but may contain three, four, five or even more monomers.
- the properties of polymeric dispersants depend on both the nature of the monomers and their distribution in the polymer.
- Suitable copolymeric dispersants have the following polymer compositions:
- alternating polymerized monomers e.g. monomers A and B polymerized into ABABABAB
- block copolymers e.g. monomers A and B polymerized into AAAAABBBBBB wherein the block length of each of the blocks (2, 3, 4, 5 or even more) is important for the dispersion capability of the polymeric dispersant;
- graft copolymers consist of a polymeric backbone with polymeric side chains attached to the backbone; and mixed forms of these polymers, e.g. blocky gradient copolymers.
- Suitable polymeric dispersants are listed in the section on "Dispersants", more specifically [0064] to [0070] and [0074] to [0077], in EP 191 1814 A (AGFA GRAPHICS) incorporated herein as a specific reference.
- the polymeric dispersant has preferably a number average molecular weight Mn between 500 and 30000, more preferably between 1500 and 10000.
- the polymeric dispersant has preferably a weight average molecular
- weight Mw smaller than 100000, more preferably smaller than 50000 and most preferably smaller than 30000.
- the polymeric dispersant has preferably a polydispersity PD smaller than 2, more preferably smaller than 1.75 and most preferably smaller than 1.5.
- polymeric dispersants are the following:
- Particularly preferred polymeric dispersants include SolsperseTM
- GMBH GMBH.
- Particularly preferred dispersants are SolsperseTM 32000, 35000 and 39000 dispersants from NOVEON.
- the polymeric dispersant is preferably used in an amount of 2 to 600 wt%, more preferably 5 to 200 wt% based on the weight of the pigment.
- a dispersion synergist usually consists of an anionic part and a cationic part.
- the anionic part of the dispersion synergist exhibiting a certain molecular similarity with the colour pigment and the cationic part of the dispersion synergist consists of one or more protons and/or cations to compensate the charge of the anionic part of the dispersion synergist.
- the synergist is preferably added in a smaller amount than the polymeric dispersant(s).
- the ratio of polymeric dispersant dispersion synergist depends upon the pigment and should be determined experimentally. Typically the ratio wt% polymeric dispersant/wt% dispersion synergist is selected between 2:1 to 100:1 , preferably between 2:1 and 20:1 .
- Suitable dispersion synergists that are commercially available include
- Particular preferred pigments for the magenta ink used are a diketopyrrolo- pyrrole pigment or a quinacridone pigment.
- Suitable dispersion synergists include those disclosed in EP 1790698 A (AGFA GRAPHICS) , EP
- Cu-phthalocyanine dispersion synergist e.g. SolsperseTM 5000 from NOVEON is preferred.
- Suitable dispersion synergists for yellow inkjet inks include those disclosed in EP 1790697 A (AGFA GRAPHICS) .
- the radiation curable compositions and inks may contain a surfactant.
- the surfactant(s) can be anionic, cationic, non-ionic, or zwitter-ionic and are usually added in a total quantity less than 10 wt% based on the total weight of the radiation curable composition or ink and particularly in a total less than 5 wt% based on the total weight of the radiation curable composition or ink .
- Suitable surfactants include those disclosed in paragraphs [0283] to [0291] of WO 2008/074548 (AGFA GRAPHICS) incorporated herein as a specific reference.
- the UV curable compositions and inks may contain a polymerization
- Suitable polymerization inhibitors include phenol type
- antioxidants hindered amine light stabilizers, phosphor type antioxidants, hydroquinone monomethyl ether commonly used in (meth)acrylate monomers, and hydroquinone, t-butylcatechol, pyrogallol, 2,6-di-tert.butyl- 4-methylphenol may also be used.
- Suitable commercial inhibitors are, for example, SumilizerTM GA-80,
- SumilizerTM GM and SumilizerTM GS produced by Sumitomo Chemical Co. Ltd.; GenoradTM 16, GenoradTM 18 and GenoradTM 20 from Rahn AG; IrgastabTM UV10 and IrgastabTM UV22, TinuvinTM 460 and CGS20 from Ciba Specialty Chemicals; FloorstabTM UV range (UV-1 , UV-2, UV-5 and UV-8) from Kromachem Ltd, AdditolTM S range (S100, S1 10, S120 and S130) from Cytec Surface Specialties.
- the inhibitor is preferably a polymerizable inhibitor.
- the amount capable of preventing polymerization is determined prior to blending.
- polymerization inhibitor is preferably lower than 5 wt%, more preferably lower than 3 wt% of the total radiation curable composition or ink.
- the average particle size and distribution of a colour pigment is an important feature for inkjet inks.
- the inkjet ink may be prepared by precipitating or milling the pigment in the dispersion medium in the presence of the dispersant.
- Mixing apparatuses may include a pressure kneader, an open kneader, a planetary mixer, a dissolver, and a Dalton Universal Mixer.
- Suitable milling and dispersion apparatuses are a ball mill, a pearl mill, a colloid mill, a high-speed disperser, double rollers, a bead mill, a paint conditioner, and triple rollers.
- the dispersions may also be prepared using ultrasonic energy.
- the grinding media can comprise particles, preferably substantially spherical in shape, e.g. beads consisting essentially of a polymeric resin or yttrium stabilized zirconium oxide beads.
- each process is performed with cooling to prevent build up of heat, and as much as possible under light conditions in which actinic radiation has been substantially excluded.
- the inkjet ink may contain more than one pigment, and may be prepared using separate dispersions for each pigment, or alternatively several pigments may be mixed and co-milled in preparing the dispersion.
- the dispersion process can be carried out in a continuous, batch or semi- batch mode.
- the preferred amounts and ratios of the ingredients of the mill grind will vary widely depending upon the specific materials and the intended applications.
- the contents of the milling mixture comprise the mill grind and the milling media.
- the mill grind comprises pigment, polymeric dispersant and a liquid carrier.
- the pigment is usually present in the mill grind at 1 to 50 wt%, excluding the milling media.
- the weight ratio of pigment over polymeric dispersant is 20:1 to 1 :2.
- the milling time can vary widely and depends upon the pigment
- pigment dispersions with an average particle size of less than 100 nm may be prepared.
- the milling media is separated from the milled particulate product (in either a dry or liquid dispersion form) using conventional separation techniques, such as by filtration, sieving through a mesh screen, and the like. Often the sieve is built into the mill, e.g. for a bead mill.
- the milled pigment concentrate is preferably separated from the milling media by filtration.
- the inkjet ink is adjusted to the desired viscosity, surface tension, colour, hue, saturation density, and print area coverage for the particular application.
- DPGDA is dipropyleneglycoldiacrylate from SARTOMER.
- TMPTA is trimethylolpropane triacrylate available as SartomerTM SR351 from SARTOMER.
- VEEA is 2-(vinylethoxy)ethyl acrylate, a difunctional monomer available from NIPPON SHOKUBAI, Japan.
- EPD is ethyl 4-dimethylaminobenzoate, available under the trade name of GenocureTM EPD from RAHN AG.
- IC127 is an abbreviation used for IrgacureTM 127, supplied by Ciba Specialty Chemicals:
- IC907 is an abbreviation used for IrgacureTM 907 is 2-methyl-1 -[4- (methylthio)phenyl]-2-morpholino-propan-1 -one, a photoinitiator available from CIBA SPECIALTY CHEMICALS.
- IC379 is an abbreviation used for IrgacureTM 379 is a photoinitiator available from CIBA SPECIALTY having as chemical structure:
- ITX is an abbreviation used for DarocurTM ITX , an isomeric mixture of 2- and 4-isopropylthioxanthone from CIBA SPECIALTY CHEMICALS.
- TPO is an abbreviation used for 2,4,6-trimethylbenzoyl-diphenyl- phosphineoxide available under the trade name DarocurTM TPO from CIBA SPECIALTY CHEMICALS.
- GenoradTM 16 is a polymerization inhibitor from RAHN AG.
- GENOSOL is a 50wt% solution of GenoradTM 16 in DPGDA.
- PB15:4 is an abbreviation used for HostapermTM Blue P-BFS, a cyan pigment (C.I. Pigment Blue 15:4) available from CLARIANT.
- DB162 is an abbreviation used for the polymeric dispersant DisperbykTM
- DB162sol is a 30 wt% solution of DB162 in DPGDA.
- S35000 is an abbreviation used for SOLSPERSETM 35000, a
- polyethyleneimine-polyester hyperdispersant from NOVEON polyethyleneimine-polyester hyperdispersant from NOVEON.
- S35000SOL is a 40 wt% solution of S35000 in DPGDA.
- BykTM UV3510 is a polyethermodified polydimethyisiloxane wetting agent available from BYK CHEMIE GMBH. Measurement Methods
- the curing speed on a Fusion DRSE-120 conveyer was defined as the percentage of the maximum output of the lamp needed to cure the samples. The lower the number the higher curing speed. A sample was considered as fully cured at the moment scratching with a Q-tip caused no visual damage.
- a percentage of more then 100 % of the maximum output of the lamp means that the speed of the conveyer belt had to be reduced to get the sample fully cured at the maximum output of the lamp. The higher the percentage, the more the belt had to be slowed down.
- a curing speed of 160% means a belt speed of 12.5 m/min at the maximum output of the lamp.
- a percentage between 50% and 200% is considered as at the edge of practical use.
- a percentage above 200% is considered out of the range for practical use and no higher percentages are measured.
- the curing degree was tested on a coating immediately after curing with UV light.
- the cured coating is rubbed with the means of a Q-tip. When the surface is not damaged, the coating is fully cured. When some of the cured coating can be damaged, the coating is only partly cured. When the whole cured coating is damaged, the coating is not cured.
- the particle size of pigment particles in an inkjet ink was determined by photon correlation spectroscopy at a wavelength of 633 nm with a 4mW HeNe laser on a diluted sample of the pigmented inkjet ink.
- the particle size analyzer used was a MalvernTM nano-S available from Goffin-Meyvis.
- the sample was prepared by addition of one drop of ink to a cuvette
- the measured particle size is the average value of 3 consecutive measurements consisting of 6 runs of 20 seconds.
- the average particle size of the dispersed particles is below 200 nm, preferably between 70 and 150 nm. 4. Image Tone
- the degree of conversion i.e. the percentage of converted functional groups, may be determined by for example RT-FTIR (Real-Time Fourier Transform Infra-Red Spectroscopy).
- composition was coated on a PGA-paper, using a bar coater and a 10 ⁇ wired bar.
- the coated sample was mounted on a belt, transporting the samples under a Phoseon 4W 395 nm LED at a speed specified in the examples.
- ratioref leio(ref)/li72e(ref)
- I corresponds to the respective peak heights.
- Curing% 100 - (ratio CU ring / ratio re f) * 100 [0099]
- a full cure is defined as a degree of conversion wherein the increase in the percentage of converted functional groups, with increased exposure to radiation (time and/or dose), is negligible.
- a full cure corresponds with a conversion percentage that is within 10%, preferably 5%, from the maximum conversion percentage defined by the horizontal asymptote in the RT-FTIR graph (percentage conversion versus curing energy or curing time).
- the pooled organic fractions were dried over MgS0 4 and the solvent was evaporated under reduced pressure to obtain a brown oil.
- the crude 9-(2- ethyl-hexyl)-9H-carbazole was purified on a Merck SVP D40 Column using n-hexane as eluent. Evaporation of the pooled fractions yielded 85 g of 9- (2-ethyl-hexyl)-9H-carbazole.
- the organic fraction was isolated, extracted with brine and twice with 200 ml of a satured NaHC03 solution.
- the intermediate diester precipitated from the organic fraction and was isolated by filtration. The filtrate was evaporated under reduced pressure and the residue was treated with toluene, yielding a second crop of the diester.
- the fractions were pooled and 52.8 g (43.6 %) of the diester was isolated (Rt : 0.23, eluent 70/30 hexane/ethyl acetate on Merck Kieselgel 60 F254.). The intermediate was used without further purification.
- INI-8 was isolated by preparative column chromatography on a Prochrom LC80 column, using Kromasil Si 60A 10 ⁇ and a gradient elution from 100% methylene chloride to methylene chloride/ethyl acetate 94/6 at a flow rate of 150 ml/min. (Rf : 0.35, eluent MeOH/NaCI 90/10, Partisil KC18F ).
- N-sec.butyl-carbazole was isolated by preparative column chromatography on a Prochrom LC80 column, using Kromasil Si60 10 pm and n. hexane/methylene chloride 93/7 as eluent. 8.7 g (26 %) of N-sec. butyl carbazole was isolated.
- INI-5 and INI-10 were isolated by preparative column chromatography on a Prochrom LC80 column, using Kromasil Si60A 10 pm and n.-hexane/ethyl acetate 70/30 as eluent.
- 5.4 g of INI-10 was isolated (Rf : 0.51 , eluent ethyl acetate/hexane 30/70, Merck Kieselgel 6OF254).
- 3.87 g of INI-5 was isolated (R f : 0.3, eluent ethyl acetate/hexane 30/70, Merck Kieselgel 6OF254).
- the intermediate oxime was isolated by preparative column chromatography on a Prochrom LC80 column, using Kromasil Si 60A 10 ⁇ and a gradient elution from n.-hexane/ethyl acetate 70/30 to n.- hexane/ethyl acetate 50/50 at a flow rate of 150 ml/min. 1 .4 g of the intermediate bis-oxime was isolated (Rf : 0.5, eluent n.-hexane/ethyl acetate 50/50, Merck Kieselgel 60 F254).
- INI-8 was purified by by crystallisation from n.- hexane/ethyl acetate 60/40 (Rf : 0.25, eluent : n.-hexane/ethyl acetate 50/50, Merck Kieselgel 60 F254).
- compositions according to the present invention are compositions according to the present invention.
- the comparative radiation curable compositions COMP-1 and COMP-2 and the inventive radiation curable compositions INV-1 to INV-4 were prepared according to Table 5.
- the weight% (wt%) was based on the total weight of the radiation curable compositions.
- the free radical curable liquids COMP-1 and COMP-2 and INV-1 to INV-4 were coated on a PET100 substrate using a bar coater and a 10 ⁇ wired bar. Each coated sample was cured using a Fusion DRSE-120 conveyer, equipped with a Fusion VPS/I600 lamp (D-bulb), which transported the samples under the UV-lamp on a conveyer belt at a speed of 20 m/min. The curing speed was determined and is shown in Table 6.
- This example illustrates that the radiation curable inkjet inks according to the present invention can be cured with a UV LED (395 nm) and do not have the undesirable yellowing behaviour of ITX.
- the mixture was circulated over the mill for 7 hours and 45 minutes at a flow rate of about 2 L per minute and a rotation speed in the mill of about 5 m/s. During the complete milling procedure the content in the mill was cooled to a temperature of 42°C. After milling, the concentrated pigment dispersion DISP-1 was discharged into another 125 L vessel. The resulting concentrated pigment dispersion DISP-1 according to Table 7 exhibited an average particle size of 1 10 nm.
- the mixture was circulated over the mill for 1 hour and 50 minutes at a flow rate of about 5 L per minute and a rotation speed in the mill of about 15 m/s. During the complete milling procedure the content of the mill was cooled to a temperature of 54°C. The concentrated pigment dispersion DISP-2 was discharged into another 60 L vessel. The resulting
- concentrated pigment dispersion DISP-2 according to Table 8 exhibited an average particle size of 1 19 nm.
- the comparative radiation curable inkjet inks COMP-3 and COMP-4 and the inventive radiation curable inkjet inks INV-5 and INV-6 were prepared according to Table 9.
- the weight% (wt%) was based on the total weight of the radiation curable compositions.
- the comparative radiation curable inkjet inks COMP-3 and COMP-4 and inventive radiation curable inkjet inks INV-5 and INV-6 were coated on PGA-paper, using a bar coater and a 10 pm wired bar.
- the coated samples were mounted on a belt, transporting the samples under a Phoseon 4W 395 nm LED. The number of passes at a given belt speed to completely cure the samples was determined. The Q-tip method was used to determine complete cure. The results are summarized in Table 10.
- This example illustrates the high curing speed of radiation curable inkjet inks according to the present invention.
- the comparative radiation curable compositions COMP-5 and COMP-6 and the inventive radiation curable compositions INV-7 to INV-9 were prepared according to Table 12.
- the same concentrated pigment dispersions DISP-1 and DISP-2 of EXAMPLE 3 were used.
- the weight% (wt%) was based on the total weight of the radiation curable compositions.
- the inkjet inks INV-7 to INV-9 and COMP-4 and COMP-6 were cured on a Fusion DRSE-120 conveyer equipped with Fusion VPS/I600 lamp (D-bulb) at 40m/min at full power of the lamp. The degree of curing was evaluated using a Q-tip. A sample was considered as fully cured at the moment scratching with a Q-tip caused no visual damage. The results are summarized in Table 13.
- the comparative radiation curable compositions COMP-7 and COMP-8 and the inventive radiation curable compositions INV-10 to INV-14 were prepared according to Table 14.
- the same concentrated pigment dispersions DISP-1 and DISP-2 of EXAMPLE 3 were used.
- the weight% (wt%) was based on the total weight of the radiation curable compositions.
- VEEA 24.5 - 26.5 - 24.5 30.0 -
- GenoradTM 16 0.8 0.8 0.8 0.9 0.8 0.9 0.9 0.9
- the comparative radiation curable compositions COMP-7 and COMP-8 and inventive radiation curable compositions INV-10 to INV-14 were coated on PGA-paper, using a bar coater and a 10 ⁇ wired bar.
- the coated samples were mounted on a belt, transporting the samples under a Phoseon 4W 395 nm LED at a speed of 5 m/min and 10 m/min
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- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
- Ink Jet Recording Methods And Recording Media Thereof (AREA)
- Polymerisation Methods In General (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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EP20100787751 EP2510400B1 (en) | 2009-12-07 | 2010-12-06 | Uv-led curable compositions and inks |
US13/511,374 US8569393B2 (en) | 2009-12-07 | 2010-12-06 | UV-LED curable compositions and inks |
CN201080055159.3A CN102640055B (en) | 2009-12-07 | 2010-12-06 | UV-LED curable compositions and inks |
BR112012013777A BR112012013777A2 (en) | 2009-12-07 | 2010-12-06 | UV curable compositions and inks. |
CA2779560A CA2779560A1 (en) | 2009-12-07 | 2010-12-06 | Uv-led curable compositions and inks |
AU2010330040A AU2010330040B2 (en) | 2009-12-07 | 2010-12-06 | UV-LED curable compositions and inks |
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EP09178162 | 2009-12-07 | ||
US26746509P | 2009-12-08 | 2009-12-08 | |
US61/267,465 | 2009-12-08 |
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EP (1) | EP2510400B1 (en) |
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AU (1) | AU2010330040B2 (en) |
BR (1) | BR112012013777A2 (en) |
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US8569393B2 (en) | 2013-10-29 |
EP2510400B1 (en) | 2015-04-29 |
US20120283349A1 (en) | 2012-11-08 |
AU2010330040A1 (en) | 2012-05-10 |
AU2010330040B2 (en) | 2013-12-19 |
CN102640055A (en) | 2012-08-15 |
CA2779560A1 (en) | 2011-06-16 |
EP2510400A1 (en) | 2012-10-17 |
BR112012013777A2 (en) | 2018-05-08 |
CN102640055B (en) | 2015-02-25 |
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