Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
  • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
  • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
  • B41M5/52—Macromolecular coatings
  • B41M5/5254—Macromolecular coatings characterised by the use of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
  • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
  • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
  • B41M5/52—Macromolecular coatings
  • B41M5/5236—Macromolecular coatings characterised by the use of natural gums, of proteins, e.g. gelatins, or of macromolecular carbohydrates, e.g. cellulose
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
  • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
  • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
  • B41M5/52—Macromolecular coatings
  • B41M5/5245—Macromolecular coatings characterised by the use of polymers containing cationic or anionic groups, e.g. mordants

Definitions

• the present invention relates to an improved ink-jet recording material.
• ink-jet printing has become a popular technique because of its simplicity, convenience and low cost. Especially in those instances where a limited edition of the printed matter is needed ink-jet printing has become the technology of choice.
• a recent survey is given by LE, Hue P. Progress and trends in ink-jet printing technology. Journal of Imaging Science and Technology . 1998, vol. 42, no. 1, p. 49-62.
• ink-jet printing tiny drops of ink fluid are projected directly onto an ink receptor surface without physical contact between the printing device and the receptor.
• the printing device stores the printing data electronically and controls a mechanism for ejecting the drops image-wise. Printing is accomplished by moving the print head across the paper or vice versa.
• Early patents on ink-jet printers include US 3739393 (MEAD CORP ), US 3805273 (MEAD CORP) and US 3891121 (MEAD CORP ).
• Jetting of the ink droplets can be performed in several different ways.
• a continuous droplet stream is created by applying a pressure wave pattern. This process is known as continuous ink-jet printing.
• the droplet stream is divided into droplets that are electrostatically charged, deflected and collected, and into droplets that remain uncharged, continue their way undeflected, and form the image.
• the charged deflected stream forms the image and the uncharged undeflected jet is collected.
• several jets are deflected to a different degree and thus record the image (multideflection system).
• the ink droplets can be created “on demand” (“DOD” or “drop on demand” method) whereby the printing device ejects the droplets only when they are used in imaging on a receiver thereby avoiding the complexity of drop charging, deflection hardware, and ink recollection.
• DOD on demand
• the ink droplet can be formed by means of a pressure wave created by a mechanical motion of a piezoelectric transducer (so-called “piezo method”), or by means of discrete thermal pushes (so-called “bubble jet” method, or “thermal jet” method).
• Ink compositions for ink-jet typically include the following ingredients: dyes and/or pigments, water and/or organic solvents, humectants such as glycols, detergents, thickeners, polymeric binders, preservatives, etc. It will be readily understood that the optimal composition of such an ink is dependent on the ink-jetting method used and on the nature of the substrate to be printed.
• the ink compositions can be roughly divided in:
• EP 754561 A discloses a recording medium, comprising a substrate and an ink receiving layer provided on at least one side of the substrate, wherein the ink receiving layer contains polyvinyl acetal resin and alumina hydrate at a ratio by weight within a range of 50/1 to 6/4.
• EP 634289 A discloses an ink-jet recording method for forming an image on a recording medium by ejecting ink droplets through an orifice of a recording head in response to a recording signals, comprising ejecting an ink having a surface tension ranging from 25 to 35 dyn/cm onto a recording medium constituted of a base sheet and a coating layer formed on the base sheet to form an image, the coating layer being selected from (a), (b), and (c) below:
• EP 799712 A discloses a recording medium comprising a substrate and an ink receiving layer provided on at least one side of the substrate, wherein the ink receiving layer comprises a composition or a curing product thereof comprising the following components: a polyvinyl acetal resin (A) having acetal groups, acetyl groups and hydroxyl groups; a monomer (B) having an active energy ray curable ethylenic unsaturated group; and a cationic resin (C); at a weight ratio (B)/(A) within a range of 1/100 to 5/1, and a weight ratio (C)/((A) + (B)) of 0.5/100 to 30/100.
• a polyvinyl acetal resin A having acetal groups, acetyl groups and hydroxyl groups
• B having an active energy ray curable ethylenic unsaturated group
• C cationic resin
• Polyvinyl alcohol and vinyl alcohol copolymers are often used in ink-jet receiving layers as a binder for transparent and porous layers.
• transparent and photograde instant dry receiving layers which are based on relatively high inorganic pigment/binder ratios to obtain high porosity in the layer, the topographic quality (eveness, roughness) is extremely important to meet the requirements on image quality (gloss, gamut). Therefore the manufacturing process has to be very well controlled.
• polymeric binders that give more or less rigid layers after cooling, so that the flow and convection of air can be sufficiently high.
• Rigid layers can be obtained by gellifying at low temperature or by at least increasing the viscosity of the layer compositions. This process was optimized for gelatin layers in the manufacturing process of the layers of photographic materials.
• an ink-jet receiving material comprising a support and at least one ink-receiving layer, the ink-receiving layer containing an inorganic pigment and a binder, wherein the binder is a water-soluble acetalized vinyl alcohol copolymer, characterized in that the ratio by weight of said inorganic pigment to the binder is at least 4/1.
• acetalization refers to the reaction in which the hydroxy groups of two vinyl alcohol monomer react with an aldehyde to form an acetal group.
• degree of acetalization refers to the weight% of acetalized monomer in the water-soluble vinyl alcohol copolymer.
• non-ionic aromatic aldehyde refers to an aromatic aldehyde without a group capable of ionizing in any medium.
• water-soluble refers to a solubility in water of at least 1 % by weight at 25°C.
• 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, 1,1-dimethyl-propyl, 2,2-dimethylpropyl and 2-methyl-butyl etc.
• saturated aliphatic group as used in disclosing the present invention means saturated straight chain, branched chain and alicyclic hydrocarbon groups.
• unsaturated aliphatic group as used in disclosing the present invention means straight chain, branched chain and alicyclic hydrocarbon groups which contain at least one double or triple bond.
• aromatic group as used in disclosing the present invention means an assemblage of cyclic conjugated carbon atoms, which are characterized by large resonance energies, e.g. benzene, naphthalene and anthracene.
• alicyclic hydrocarbon group as used in disclosing the present invention means an assemblage of cyclic conjugated carbon atoms, which do not form an aromatic group, e.g. cyclohexane.
• substituted as used in disclosing this invention means that one or more of the carbon atoms and/or that a hydrogen atom of one or more of carbon atoms in an aliphatic group, an aromatic group or an alicyclic hydrocarbon group , are replaced by an oxygen atom, a nitrogen atom, a sulfur atom,a selenium atom or a tellurium atom, or a group containing one or more of these said carbon and hydrogen replacing atoms.
• substituents include hydroxyl groups, ether groups, carboxylic acid groups, ester groups, amide groups and amine groups.
• heteroaromatic group as used in disclosing the present invention means an aromatic group wherein at least one of the cyclic conjugated carbon atoms is replaced by an oxygen atom, a nitrogen atom, a sulfur atom, a selenium atom or a tellurium atom.
• heterocyclic group as used in disclosing the present invention means an alicyclic hydrocarbon group wherein at least one of the cyclic conjugated carbon atoms is replaced by an oxygen atom, a nitrogen atom, a sulfur atom, a selenium atom or a tellurium atom.
• drying means any process in which a liquid in contact with a solid medium becomes dry to the touch and includes cooling, gellification, evaporation of a liquid, diffusion into a porous medium and poymerization.
• the support for use in the present invention can be chosen from paper type and polymeric type supports well-known from photographic technology.
• Paper types include plain paper, cast coated paper, polyethylene coated paper and polypropylene coated paper.
• Polymeric supports include cellulose acetate propionate or cellulose acetate butyrate, polyesters such as polyethylene terephthalate and polyethylene naphthalate, polyamides, polycarbonates, polyimides, polyolefins, poly(vinylacetals), polyvinyl chloride, polyethers and polysulfonamides.
• useful high-quality polymeric supports for the present invention include opaque white polyesters and extrusion blends of polyethylene terephthalate and polypropylene. Polyester film supports and especially polyethylene terephthalate are preferred because of their excellent properties of dimensional stability. When such a polyester is used as the support material, a subbing layer may be employed to improve the bonding of the ink-receiving layer to the support.
• Useful subbing layers for this purpose are well known in the photographic art and include, for example, polymers of vinylidene chloride such as vinylidene chloride /acrylonitrile /acrylic acid terpolymers or vinylidene chloride /methyl acrylate /itaconic acid terpolymers.
• the at least one ink-receiving layer contains a water-soluble acetalized vinyl alcohol copolymer as a binder.
• the acetalized water-soluble vinyl alcohol copolymer comprises at least one further different comonomer unit besides vinyl alcohol, vinyl acetate and vinyl acetal, with the further different monomer unit being preferably a cationic monomer e.g. diallyldimethyl ammonium chloride, diallyldimethyl ammonium hydroxide or diallyldimethyl ammonium acetate.
• a cationic monomer e.g. diallyldimethyl ammonium chloride, diallyldimethyl ammonium hydroxide or diallyldimethyl ammonium acetate.
• the vinyl alcohol copolymer is a cationic type of polyvinyl alcohol.
• the acetalization can be carried out in an acid-catalyzed reaction.
• Copolymers of vinylalcohol, vinylacetate and a third monomer are preferred as starting materials, with a cationic monomer preferably being the third monomer e.g. diallydimethylammonium chloride.
• a cationic monomer preferably being the third monomer e.g. diallydimethylammonium chloride.
• diallyldimethylammonium chloride any comonomer can be used as third monomer.
• the cationic groups on the polyvinylalcohol binder give a good interaction with anionic inks, which results in images with a better image quality showing less bleeding and coalescence of the anionic inks.
• the cationic groups not only interact well with anionic inks but surprisingly also have an influence on the crosslinking rate with crosslinkers like boric acid. It appears that conventional polyvinylalcohols modified with an aromatic aldehyde crosslink much faster with boric acid as compared to the corresponding cationic polyvinylalcohols.
• a commercially available cationic vinyl alcohol copolymer can be used as starting compound.
• a vinyl alcohol copolymer modified with diallyldimethyl ammonium chloride (DADMAC) comonomer units is used.
• DADMAC diallyldimethyl ammonium chloride
• Such vinyl alcohol copolymers are commercially available via the company Nippon Gohsei.
• Other suitable cationic vinyl alcohol copolymer grades are copolymers of methacrylamido propyl trimethylammonium chloride as available from the company Kuraray (e.g. trademarks POVAL CM318, POVAL C506 and POVAL C118).
• a water-soluble acetalized vinyl alcohol copolymer, as used in the inkjet receiving layer, according to the present invention, can be prepared via the following sequence of steps:
• GOHSEFIMER K210 which is a copolymer of vinylacetate, vinylalcohol and diallyldimethylammonium chloride, is suitable for this purpose (scheme 1).
• the vinyl alcohol-vinyl acetate copolymer can hydrolyse further, yielding a copolymer with a higher degree of hydrolysis.
• the chloride and acetate ions are partially or completely removed by means of an ion-exchange resin.
• the preferably used copolymer of diallyldimethylammonium chloride can therefore also be partially converted to a cationic polymer with hydroxyl or acetate counter-ions.
• Aldehydes suitable for acetalizing the vinyl alcohol copolymer to produce the water-soluble acetalized vinyl alcohol used in the ink-receiving layer include aliphatic saturated aldehydes such as formaldehyde, acetaldehyde, propionaldehyde, butyl aldehyde, isobutyl aldehyde, isopropyl aldehyde, valeraldehyde, isovaleraldehyde, and the like; heterocyclic aldehydes such as furfural and the like; aliphatic unsaturated aldehydes such as acrolein, crotonaldehyde, propriolaldehyde, hexenal, heptenal, and the like; aliphatic dialdehydes such as glyoxal, succindialdehyde, glutardialdehyde, adipodialdehyde, piperic dialdehyde
• the vinyl alcohol copolymer is modified with a sufficiently low content of aldehyde, so that the copolymer remains water-soluble.
• the degree of acetalization in said water-soluble vinyl alcohol copolymer is at most 15% by weight of aldehyde with respect to the vinyl alcohol copolymer acetalized.
• the degree of acetalization in said water-soluble vinyl alcohol copolymer is between 3 and 8% by weight of aldehyde with respect to the vinyl alcohol copolymer acetalized.
• the water-soluble acetalized vinyl alcohol copolymer is acetalized by means of a non-ionic aromatic aldehyde.
• aromatic aldehydes which can be used include benzaldehyde and phenylacetaldehyde. Modification of vinyl alcohol copolymer with benzaldehyde (scheme 2) and phenylacetaldehyde (scheme 3) yields an acetalized vinyl alcohol copolymer.
• the vinyl alcohol copolymer is modified by acetalization with a low content of a non-ionic aromatic aldehyde. This modification gives sufficient viscosity increase at low temperatures to give a more stable coating during the drying process.
• Modification of a vinyl alcohol copolymer with a benzaldehyde content above 15% by weight with respect to the vinyl alcohol copolymer renders the resulting copolymer insoluble and only soluble when alcohols are added to the modified binder.
• the presence of alcohols results in undesirable emission of alcohols during the coating of ink-jet receiving layers.
• the acetalized water-soluble vinyl alcohol copolymer is a vinyl alcohol copolymer acetalized with a non-ionic aromatic aldehyde to a degree of acetalization of at most 15 % by weight of non-ionic aromatic aldehyde with respect to the solid vinyl alcohol copolymer.
• the acetalized water-soluble vinyl alcohol copolymer is a vinyl alcohol copolymer acetalized with a non-ionic aromatic aldehyde to a degree of acetalization of between 3 and 8 % by weight of non-ionic aromatic aldehyde with respect to the solid vinyl alcohol copolymer.
• the acetalized vinyl alcohol copolymer used in the ink-jet receiving layers, according to the present invention is water-soluble.
• JP 11116620 A (SEKISUI CHEM CO LTD ) and JP 11116619 A (SEKISUI CHEM CO LTD ) disclose the use of modified vinyl alcohol copolymers in ink-jet coatings. These copolymers, such as S LEC KX-1 commercially available from Sekisui, are, however, not water-soluble.
• Sekisui describes water-insoluble polymers based on acetalised vinyl alcohol copolymer, which are described as microgels.
• the microgels are prepared by using a very high content of aromatic aldehyde (e.g. as in the Japanese patent JP 10237258 A (SEKISUI CHEM CO LTD ) ) or the use of a mixture of an aromatic aldehyde and formaldehyde.
• the at least one ink-receiving layer according to the present invention is preferably a porous layer and hence preferably contains a pigment.
• An inorganic pigment is preferably used, which can be chosen from neutral, anionic and cationic pigment types.
• Useful pigments include e.g.
• the inorganic pigment is selected from the group consiting of silica, alumina and boehmite.
• the pigment is a cationic type pigment selected from alumina hydrates, aluminum oxides, aluminum hydroxides, aluminum silicates, and cationically modified silicas.
• a preferred type of alumina hydrate is crystalline boehmite, or ⁇ -AIO(OH).
• Useful types of boehmite include, in powder form, DISPERAL, DISPERAL HP14 and DISPERAL 40 from Sasol, MARTOXIN VPP2000-2 and GL-3 from Martinswerk GmbH.; liquid boehmite alumina systems, e.g. DISPAL 23N4-20, DISPAL 14N-25, DISPERAL AL25 from Sasol, boehmite dispersions BACASOL 2C and BACASOL 3C from Alcan.
• Patents disclosing the use of alumina hydrate in ink-jet receiving layers EP 500021 A (ASAHI GLASS ), EP 634286 A (ASAHI GLASS), US 5624428 (KIMBERLY CLARK), EP 742108 A (ASAHI GLASS), US 6238047 (ASAHI GLASS ), EP 622244 A (CANON KK), EP 810101 A (CANON KK ) , etc..
• Useful cationic aluminum oxide (alumina) types include ⁇ -Al 2 O 3 types, such as NORTON E700, available from Saint-Gobain Ceramics & Plastics, Inc, and ⁇ -Al 2 O 3 types, such as ALUMINUM OXID C from Degussa; other aluminum oxide grades, such as BAIKALOX CR15 and CR30 from Baikowski Chemie; DURALOX grades and MEDIALOX grades from Baikowski Chemie, BAIKALOX CR80, CR140, CR125, B105CR from Baikowski Chemie; CAB-O-SPERSE PG003 trademark from Cabot, CATALOX GRADES and CATAPAL GRADES from from Sasol, such as PLURALOX HP14/150; colloidal Al 2 O 3 types, such as ALUMINASOL 100; ALUMINASOL 200, ALUMINASOL 220, ALUMINASOL 300, and ALUMINASOL 520 trademarks from Nissan Chemical Industries or NALCO 8676 trademark from OND
• cationic inorganic pigments include aluminum trihydroxides such as Bayerite, or ⁇ -AI(OH) 3 , such as PLURAL BT, available from Sasol, and Gibbsite, or ⁇ -Al(OH) 3 , such as MARTINAL grades from Martinswerk GmbH, MARTIFIN grades, such as MARTIFIN OL104, MARTIFIN OL 107 and MARTIFIN OL111 from Martinswerk GmbH , MICRAL grades, such as MICRAL 1440, MICRAL 1500; MICRAL 632; MICRAL 855; MICRAL 916; MICRAL 932; MICRAL 932CM; MICRAL 9400 from JM Huber company; HIGILITE grades, e.g.
• HIGILITE H42 or HIGILITE H43M from Showa Denka K.K. HYDRAL COATES grades from Alcoa Co., such as HYDRAL COAT 2, 5 , and 7, HYDRAL PGA and HYDRAL 710.
• zirconium oxide such as NALCO OOSS008 trademark of ONDEO Nalco, acetate stabilized ZrO 2 , ZR20/20, ZR50/20, ZR100/20 and ZRYS4 trademarks from Nyacol Nano Technologies.
• Useful mixed oxides are SIRAL grades from Sasol, colloidal metal oxides from Nalco such as Nalco 1056, Nalco TX10496, Nalco TX11678.
• silica is silica, which can be used as such in its anionic form or after cationic modification.
• Silica as pigment in ink-receiving elements is disclosed in numerous old and recent patents, e.g. US 4892591 (MIZUSAWA INDUSTRIAL CHEM ), US 4902568 (CANON KK), EP 373573 A (CIBA GE)GY), EP 423829 A (OJI PAPER) , EP 487350 A (XEROX), EP 493100 A (SANYO KOKUSAKU PULP ), EP 514633 A (SCHOELLER FELIX JUN PAPIER) , etc.
• the silica can be chosen from different types, such as crystalline silica, amorphous silica, precipitated silica, fumed silica, silica gel, spherical and non-spherical silica.
• the silica may contain minor amounts of metal oxides from the group Al, Zr, Ti.
• Useful types include AEROSIL OX50 (BET surface area 50 ⁇ 15 m 2 /g, average primary particle size 40 nm, SiO 2 content > 99.8%, Al 2 O 3 content ⁇ 0.08%), AEROSIL MOX170 (BET surface area 170 m 2 /g, average primary particle size 15 nm, SiO 2 content > 98.3%, Al 2 O 3 content 0.3-1.3%), AEROSIL MOX80 (BET surface area 80 ⁇ 20 m 2 /g, average primary particle size 30 nm, SiO 2 content > 98.3%, Al 2 O 3 content 0.3-1.3%), or other hydrophilic AEROSIL grades available from Degussa-Hüls AG, which may give aqueous dispersions with a small average particle size ( ⁇ 500 nm).
• AEROSIL OX50 BET surface area 50 ⁇ 15 m 2 /g, average primary particle size 40 nm, SiO 2 content > 99.8%, Al 2 O 3
• Cationically modified silica is disclosed in JP 60219084 (MITSUBISHI SEISHI KK) and JP 60224580 (MITSUBISHI SEISHI KK) and can be prepared by following methods, without meaning to be limitative :
• the pigment may be chosen from organic particles such as polystyrene, polymethyl methacrylate, silicones, melamine-formaldehyde condensation polymers, urea-formaldehyde condensation polymers, polyesters and polyamides. Mixtures of inorganic and organic pigments can be used. However, most preferably the pigment is an inorganic pigment.
• the pigment must be present in a sufficient coverage in order to render the ink-receiving layer sufficiently porous that inks are rapidly dry to the touch upon contacting with the ink-jet receiving layer.
• the particle size of the pigment should preferably be smaller than 500 nm.
• the pigment/binder ratio should be at least 4.
• the pore volume of these highly pigmented coatings should be higher than 0.1 ml/g of coated solids. This pore volume can be measured by gas adsorption (nitrogen) or by mercury diffusion.
• the ink-receiving layer may be just a single layer but, alternatively, it may be composed of a double layer or even of a multiple layer assemblage. In the latter cases the pigment may be present in one of the layers, in several of the layers or in all of the layers, which may be coated sequentially or simultaneously.
• a cationic substance acting as mordant may be present in the ink-receiving layer.
• Such substances increase the capacity of the layer for fixing and holding the dye of the ink droplets.
• a particularly suitable compound is a poly(diallyldimethylammonium chloride) (poly(DADMAC). These compounds are commercially available from, for example, Aldrich, Nalco, CIBA, Nitto Boseki Co., Clariant, BASF and EKA Chemicals.
• DADMAC copolymers such as copolymers of DADMAC with acrylamide, e.g NALCO 1470 trade mark of ONDEO Nalco or PAS-J-81, trademark of Nitto Boseki Co., such as copolymers of DADMAC with acrylates, such as Nalco 8190, trademark of ONDEO Nalco; copolymers of DADMAC with SO 2 , such as PAS-A-1 or PAS-92, trademarks of Nitto Boseki Co., copolymer of DADMAC with maleic acid, e.g.
• DADMAC copolymers such as copolymers of DADMAC with acrylamide, e.g NALCO 1470 trade mark of ONDEO Nalco or PAS-J-81, trademark of Nitto Boseki Co., such as copolymers of DADMAC with acrylates, such as Nalco 8190, trademark of ONDEO Nalco; copolymers of DADMAC with SO 2
• PAS-410 trademark of Nitto Boseki Co., copolymer of DADMAC with diallyl(3-chloro-2-hydroxypropyl)amine hydrochloride, eg. PAS-880, trademark of Nitto Boseki Co., dimethylamine-epichlorohydrine copolymers, e.g.
• Nalco 7135 trademark of ONDEO Nalco or POLYFIX 700, trade name of Showa High Polymer Co.
• other POLYFIX grades which could be used are POLYFIX 601, POLYFIX 301, POLYFIX 301A, POLYFIX 250WS, and POLYFIX 3000 ;
• NEOFIX E-117 trade name of Nicca Chemical Co., a polyoxyalkylene polyamine dicyanodiamine, and REDIFLOC 4150, trade name of EKA Chemicals, a polyamine;
• MADQUAT methacryloxyethyltrimethylammonium chloride
• CYPRO 514/515/516, SUPERFLOC 507/521/567 cationic acrylic polymers, such as ALCOSTAT 567, trademark of CIBA, cationic cellulose derivatives such as CELQUAT L-200, H-100, SC-240C, SC-230M, trade names of Starch & Chemical Co., and QUATRISOFT LM200, UCARE polymers JR125, JR400, LR400, JR30M, LR30M and UCARE polymer LK; fixing agents from Chukyo Europe: PALSET JK-512, PALSET JK512L, PALSET JK-182, PALSET JK-220, WSC-173, WSC-173L, PALSET JK-320, PALSET JK-320L and PALSET JK-350; polyethyleneimine and copolymers, e.g.
• LUPASOL trade name of BASF AG
• triethanolamine-titanium-chelate e.g. TYZOR, trade name of Du Pont Co.
• copolymers of vinylpyrrolidone such as VIVIPRINT 111, trade name of ISP, a methacrylamido propyl dimethylamine copolymer; with dimethylaminoethylmethacrylate such as COPOLYMER 845 and COPOLYMER 937, trade names of ISP
• vinylimidazole e.g.
• LUVIQUAT CARE, LUVITEC 73W, LUVITEC VP155 K18P, LUVITEC VP155 K72W, LUVIQUAT FC905, LUVIQUAT FC550, LUVIQUAT HM522, and SOKALAN HP56 all trade names of BASF AG; polyamidoamines, e.g. RETAMINOL and NADAVIN, trade marks of Bayer AG; phosphonium compounds such as disclosed in EP 609930 A (AGFA GEVAERT NV) and other cationic polymers such as NEOFIX RD-5, trademark of Nicca Chemical Co.
• the ink-receiving layer(s), and an optional auxiliary layer, such as a backing layer for anti-curl purposes, or an extra protective layer, may further contain well-known conventional ingredients, such as hardening agents, plasticizers, whitening agents, matting agents and surfactants serving as coating aids.
• Surfactants may be incorporated in the layers of the ink-jet receiving material of the present invention. They can be any of the cationic, anionic, amphoteric, and non-ionic ones as described in JP 62280068 A (CANON INC) .
• Suitable surfactants are N-alkylamino acid salts, alkylether carboxylic acid salts, acylated peptides, alkylsulfonic acid salts, alkylbenzene and alkylnaphthalene sulfonic acid salts, sulfosuccinic acid salts, ⁇ -olefin sulfonic acid salts, N-acylsulfoacid salts, sulfonated oils, alkylsulfonic acid salts, alkylether sulfonic acid salts, alkylallylethersulfonic acid salts, alkylamidesulfonic acid salts, alkylphosphoric acid salts, alkyletheracid salts, alkylallyletherphosphoric acid salts, alkyl and alkylallylpolyoxyethylene ethers, alkylallylformaldehyde condensed acid salts, alkylallylethersulfonic acid salts, alkyl
• Useful cationic surfactants include N-alkyl dimethyl ammonium chloride, palmityl trimethyl ammonium chloride, dodecyldimethylamine, tetradecyldimethylamine, ethoxylated alkyl guanidine-amine complex, oleamine hydroxypropyl bistrimonium chloride, oleyl imidazoline, stearyl imidazoline, cocamine acetate, palmitamine, dihydroxyethylcocamine, cocotrimonium chloride, alkyl polyglycolether ammonium sulphate, ethoxylated oleamine, lauryl pyridinium chloride, N-oleyl-1,3-diaminopropane, stearamidopropyl dimethylamine lactate, coconut fatty amide, oleyl hydroxyethyl imidazoline, isostearyl ethylimidonium ethosulphate, lauramidopropyl PEG-d
• These surfactants are commercially available from DuPont and 3M.
• the concentration of the surfactant component in the ink-receiving layer is typically in the range of 0.1 to 2 %, preferably in the range of 0.4 to 1.5 % and is most preferably 0.75 % by weight based on the total dry weight of the layer.
• the ink-receiving layer(s) and the optional auxiliary layer(s) preferably further contain a crosslinking agent.
• crosslinking agents that will crosslink film-forming binders, including formaldehyde and free dialdehydes, such as succinaldehyde and glutaraldehyde; blocked dialdehydes; active esters; sulfonate esters; active halogen compounds; isocyanate or blocked isocyanates; polyfunctional isocyanates; melamine derivatives; s-triazines and diazines; epoxides; active olefins having two or more active bonds; carbodiimides; zirconium complexes, e.g.
• mucochloric and mucobromic acids onium substituted acroleins; vinyl sulfones; polymeric hardeners, such as dialdehyde starches and copoly(acroleinmethacrylic acid), oxazoline functional polymers, e.g. EPOCROS WS-500, and EPOCROS K-1000 series, and maleic anhydride copolymers, e.g. GANTREZ AN119; and boric acid, boric acid salts and borates.
• boric acid is a preferred crosslinker.
• the ink-receiving layer and the optional auxiliary layer(s) may also comprise a plasticizer such as ethylene glycol, diethylene glycol, propylene glycol, polyethylene glycol, glycerol monomethylether, glycerol monochlorohydrin, ethylene carbonate, propylene carbonate, urea phosphate, triphenylphosphate, glycerolpropylene glycol monostearate, tetramethylene sulfone, n-methyl-2-pyrrolidone, n-vinyl-2-pyrrolidone.
• a plasticizer such as ethylene glycol, diethylene glycol, propylene glycol, polyethylene glycol, glycerol monomethylether, glycerol monochlorohydrin, ethylene carbonate, propylene carbonate, urea phosphate, triphenylphosphate, glycerolpropylene glycol monostearate, tetramethylene sulfone, n-methyl-2
• the different layers can be coated onto support by any conventional coating technique, such as dip coating, knife coating, extrusion coating, spin coating, slide hopper coating and curtain coating.
• the warm aqueous solution was neutralised using 11.7 L of an alkaline ion-exchange resin (alkaline treated LEWATIT M600 MB).
• the ion-exchange resin was filtered off and the hot filtrate was allowed to cool to room temperature.
• Bronidox K was added as biocide (200 ppm).
• Synthetic procedure for Polymer 2 i.e. GOHSEFIMER K210 modified with 3.75% benzaldehyde relative to the vinyl alcohol copolymer solid mass.
• the warm aqueous solution was neutralised using 11.7 L of an alkaline ionexchange resin (alkaline treated LEWATIT M600 MB).
• the ionexchange resin was filtered off and the hot filtrate was allowed to cool to room temperature.
• Bronidox K was added as biocide (200 ppm).
• Synthetic procedure for Polymer 3 i.e. GOHSEFIMER K210 modified with 4.25 weight% phenylacetaldehyde relative to the vinyl alcohol copolymer solid mass.
• Synthetic procedure for Polymer 4 i.e. MOWIOL 8/88 modified with 3.75 weight% benzaldehyde relative to the vinyl alcohol copolyrmer solid mass.
• the warm aqueous solution was neutralised using 2580 ml of an alkaline ion-exchange resin (alkaline treated LEWATIT M600 MB).
• the ion-exchange resin was filtered off using a Büchner funnel with 25 ⁇ m nylon filter and the hot filtrate was allowed to cool to room temperature.
• Bronidox K was added as biocide (400 ppm).
• the prepared solution has a pH of 6.75.
• Synthetic procedure for Polymer 5 i.e. MOWIOL 8/88 modified with 4.25 weight% phenylacetaldehyde related to the vinyl alcohol copolymer solid mass.
• the warm aqueous solution was neutralised using 2050 ml of an alkaline ion-exchange resin (alkaline treated LEWATIT M600 MB).
• the ion-exchange resin was filtered off using a Büchner funnel with 25 ⁇ m nylon filter and the hot filtrate was allowed to cool to room temperature.
• Bronidox K was added as biocide (400 ppm).
• the prepared solution has a pH of 7.35.
• Ink-receiving layers based on boehmite and a water-soluble acetalized vinyl alcohol copolymer, GOHSEFIMER K210 modified with 3.75 % of benzaldehyde relative to the vinyl alcohol copolymer solid mass, as principal ingredients, and crosslinked with boric acid, were coated as a triple layer pack by means of standard coating device on a transparent 100 ⁇ m thick polyester support.
• the layer composition is summarized in Table 1.
• the assemblage of coated layers having a total thickness of 144 ⁇ m were subjected to an online drying process to evaporate the water.
• the drying process consisted of the following two essential steps :
• Ink-receiving layers based on boehmite and a water-soluble vinyl alcohol copolymer, GOHSEFIMER K210, as principal ingredients, and crosslinked with boric acid, were coated as a triple layer pack by means of standard coating device on a transparent 100 ⁇ m thick polyester support.
• the layer composition is summarized in Table 2.
• the assemblage of coated layers having a total thickness of 144 ⁇ m were subjected to the same online drying process as the evaluation invention example.

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• 2004
  • 2004-01-07 EP EP20040100018 patent/EP1437230A1/de not_active Withdrawn

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