193results about How to "Excellent printing durability" patented technology

Disclosed is a printing plate material comprising a substrate and a component layer provided thereon, the substrate having a center line average surface roughness Ra of from 0.2 to 1.0 μm, and an oil-retention volume A2 of from 1 to 10, wherein the center line average surface roughness Ra is obtained from three dimension surface roughness measurement according to JIS-B-0601, and wherein an image is capable of being recorded on the component layer by imagewise exposure of infrared laser.

A light-sensitive lithographic printing plate comprises a hydrophilic substrate provided thereon with an infrared light-sensitive layer which comprises (A) an acetal polymer having a specific structure; (B) a polymeric compound carrying, on the side chains, fluorinated aliphatic groups in which the fluorinated aliphatic groups are those derived from fluorinated aliphatic compounds prepared by the telomerization or oligomerization; and (C) a light-heat conversion substance. The light-sensitive lithographic printing plate is excellent in the both printing durability and the developing latitude.

An electrical conductive roller comprises a shaft member, an elastic layer disposed on an outer side of the shaft member in a radial direction and at least one resin coating layer disposed on an outer side of the elastic layer in the radial direction, wherein a resin coating layer at least adjacent to the elastic layer is made of a ultraviolet-cured resin formed by curing a paint for the resin coating layer comprising (A) a (metha)acrylate oligomer, (B) a (metha)acrylate monomer and (C) a photopolymerization initiator through irradiation of ultraviolet rays, and having an elongation at break of not less than 80%.

An inkjet ink comprising water, a self-dispersing carbon black pigment, and a water soluble polymer containing acid groups neutralized by an inorganic base, wherein said carbon black pigment comprises greater than 11 weight % volatile surface functional groups. The inks of the present invention have improved print density on plain paper, good text quality, improved print durability such as waterfastness and excellent jetting performance over an extended printing period. They further provide good print uniformity over a wide variety of inkjet receivers.

There is devised a novel acryl resin in which an unsaturated group introduced in an alkali soluble resin is placed at a longer distance from the resin skeleton of the alkali soluble resin, the mobility of the unsaturated group is promoted and the number of the unsaturated double bonds is increased; therefore it allows crosslinking reaction to occur easily and a functional resin portion which imparts a specific function, in particular, function of suppressing polymerization inhibition due to oxygen by introduction of an active methylene group is provided at a resin portion existing between the acryl resin skeleton and the unsaturated double bond, and a photosensitive resin composition containing thereof is to be provided. A photosensitive resin composition comprising an alkali soluble resin, an ethylenically unsaturated compound, a near infrared absorbing dye, a compound containing a halomethyl group and a compound containing an organoboron anion, wherein the alkali soluble resin comprises an acryl resin having one or more of pendant groups in which both terminals of a diol compound have been blocked with isophorone diisocyanates and then (meth)acryloyl has been added, and, an image forming material comprising a substrate, and a photosensitive layer formed by the photosensitive resin composition on the substrate, as well as an image forming method.

Disclosed are a light sensitive composition comprising an addition polymerizable ethylenically unsaturated monomer, a photopolymerization initiator and a polymer binder, and a light sensitive planographic printing plate material comprising a hydrophilic support, and provided thereon, the light sensitive composition, wherein the photopolymerization initiator is a trihalomethyl group-containing oxadiazole compound represented by the following formula 1 or 2,

Disclosed is a light sensitive planographic printing plate material comprising a hydrophilic support and provided thereon, a light sensitve layer containing (A) an infrared absorbing dye, (B) a radical generating agent, and (C) a radically polymerizable compound, the light sensitve layer being an outermost layer, wherein the radical generating agent is selected from the group consisting of a sulfonium salt, a iodonium salt and a diazonium salt, and the radically polymerizable compound is a radically polymerizable oxirane compound having an oxirane ring in the molecule.

The invention provides a planographic printing plate precursor that is capable of providing a planographic printing plate in which ablation at the time of infrared laser exposure is inhibited and which has excellent developability of a non-image portion and printing durability of an image portion. The photosensitive planographic printing plate precursor, includes: an image recording layer on a hydrophilic support, the image recording layer including: (A) an infrared absorber; and (B) a copolymer having a repeating unit having a zwitterionic structure in a side chain thereof, and a repeating unit having a heteroalicyclic structure or a repeating unit having a hetero atom and an alicyclic structure in the main chain thereof.

The present invention provides a copolymer comprising repeating units derived from (A) at least one fluoroalkyl (meth) acrylate represented by the following general formula (I) or (II):

wherein, X¹ represents —O— or —NR³—; R¹ represents —H or —CH₃; R³ represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 12 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 12 carbon atoms, a substituted or unsubstituted aryl group having 6 to 12 carbon atoms or a substituted or unsubstituted aralkyl group having 7 to 24 carbon atoms; R² represents H or F; m is an integer ranging from 0 to 10; n is an integer of 2 or 3; and o and p each represents an integer of 1 or 2, and (B) at least one polyoxyalkylene group-containing ethylenically unsaturated monomer, and also provides an image-forming composition, a presensitized plate useful for preparing a lithographic printing plate, a paint composition or a photo resist composition comprising the copolymer. The fluoroaliphatic group-containing copolymer can provide a coating composition capable of simultaneously satisfying the requirements for the ability of a coating liquid to wet the base material and the uniform coating ability upon the application of the liquid and the post-processing aptitudes such as the re-coating ability of the coated film and developing ability as well as the foaming ability of the coating liquid.

The invention discloses a new lithographic printing plate precursor, which comprises a cross-linked hydrophilic layer arranged on a carrier, which has a cross-linked structure and contains a hydrophilic polymer compound with a hydrophilic graft chain.

A photosensitive lithographic printing plate comprising: a hydrophilic support; and a photosensitive layer containing a polymerization initiator, a chain transfer agent, a compound having an ethylenically unsaturated double bond and a polymer binder having a crosslinkable group in a side chain, wherein the chain transfer agent is a thiol compound represented by the following formula (I):

in which R represents an alkyl group which may have a substituent or an aryl group which may have a substituent; and A represents an atomic group necessary for forming a 5-membered or 6-membered hetero ring containing a carbon atom together with the N═C—N linkage, and A may have a substituent.

To provide an infrared-sensitive or heat-sensitive lithographic printing plate precursor which has high printing durability and wide development latitude, and also has good developing properties capable of preventing the formation of deposits during the development. In an infrared-sensitive or heat-sensitive lithographic printing plate precursor, comprising a substrate, a first image recording layer formed on the substrate, and a second image recording layer formed on the first image recording layer, the first image recording layer contains a resin which is soluble or dispersible in an aqueous alkali solution, and the second image recording layer contains a polyurethane which has a substituent having an acidic hydrogen atom.

A lithographic printing plate precursor comprising a support and a photosensitive layer, wherein the photosensitive layer comprises a photosensitive resin composition containing (A) a sensitizing dye absorbing light of from 350 to 450 nm, (B) a polymerization initiator, (C) a polymerizable compound and (D) a binder polymer, and (D) the binder polymer is an acrylic resin containing a hydrophilic group and a crosslinkable group and having an acid value of 0.3 meq/g or less.

Disclosed is a photosensitive resin composition for flexographic printing plates containing a thermoplastic elastomer (A), a polymer (B) mainly composed of butadiene, a photopolymerizable unsaturated monomer (C) and a photopolymerization initiator (D) (which composition substantially contains no hydrophilic polymers). In this photosensitive resin composition for flexographic printing plates, the number average molecular weight of the polymer (B) is not less than 10,000 and not more than 60,000, and the 1, 2 vinyl content in the total double bonds of the polymer (B) is not more than 25%.

A photosensitive composition comprising: (A) a sensitizing dye selected from the group consisting of compounds represented by formulae (1) and (2) defined herein; (B) an initiator compound capable of generating a radical, an acid or a base; and (C) a compound capable of changing irreversibly its physical or chemical property with at least one of a radical, an acid and a base.

The present invention provides a presensitized plate useful for preparing a lithographic printing plate, which comprises a substrate provided thereon with a light-sensitive layer containing a fluoro-aliphatic group-containing copolymer prepared by copolymerizing at least (A) a fluoroalkyl(meth)acrylate represented by the general formula (I) and (B) a polyoxyalkylene group-containing ethylenic unsaturated monomer. By such a presensitized plate, a lithographic printing plate is provided with a light-sensitive layer whose uniformity and solubility or dispersibility in a developer are improved and which has an ability of forming high contrast images without entraining any reduction of the sensitivity.

The present invention is to provide a toner which can maintain a desired function of an external additive (a function to impart charge stability and flowability to the toner) under a severe usage environment such as high temperature and high humidity (H/H), which has an excellent initial charging speed, which has stable charging ability and flowability over time, which maintains reproducibility of thin lines and is unlikely to cause a deterioration in image quality due to fog or the like even after a large number of prints are continuously printed, and which has excellent printing durability. Also, the present invention is to provide a toner for developing electrostatic images, comprising external additives, and colored resin particles comprising a binder resin and a colorant, wherein the external additives contain external additive A and external additive B, wherein external additive A is fatty acid metal salt particles, and a content of the fatty acid metal salt particles is in the range from 0.01 to 0.5 part by weight with respect to 100 parts by weight of the colored resin particles, and wherein external additive B is spherical colloidal silica particles having a number average primary particle diameter of 30 to 80 nm and being surface-treated with a silane compound having an alkyl group of 8 to 20 carbons, and a content of the spherical colloidal silica particles is in the range from 0.3 to 2.0 parts by weight with respect to 100 parts by weight of the colored resin particles.

A lithographic printing plate precursor includes, in the following order: a support; an image-recording layer which is capable of forming an image by removing an unexposed area of the image-recording layer with at least one of printing ink and dampening water on a printing machine after exposure and contains an infrared absorbing dye, a polymerization initiator, a polymerizable compound and a binder polymer having an alkylene oxide group; and a protective layer containing a hydrophilic polymer which contains at least a repeating unit represented by the formula (1) as defined herein, a repeating unit represented by the formula (2) as defined herein, and a repeating unit represented by the formula (4) as defined herein, and in which a content of the repeating unit represented by the formula (4) is from 0.3 to 5.0% by mole based on total repeating units of the hydrophilic polymer.

Improved printing inks that provide selectively enhanced properties when applied to substrates. In particular, the improved inks use microcapsules to improve the quality, durability, and/or security of printed inks on substrates, for example identification documents. The microcapsules contain property enhancing chemical components that can be released from the capsules before, during or after printing is completed. The property enhancing components bring about a physical interaction and/or chemical reaction at the ink-substrate interface, in the print ink composition, and/or in the print ink surface, which may result for instance in at least one of improved adhesion, abrasion resistance, chemical resistance, and cohesive strength of the printed ink.

Provided is a toner for developing electrostatic image which is excellent in shelf stability, and is further excellent in low-temperature fixability so as to be capable of maintaining a high fixing rate even at a low fixing temperature.

A toner for developing electrostatic image is used which comprises colored resin particles containing a binder resin, a colorant, and a parting agent, wherein the parting agent is an aliphatic hydrocarbon polymer obtained by polymerizing an aliphatic hydrocarbon monomer.

Disclosed is a process for manufacturing an aluminum support for a light sensitive planographic printing plate material, the process comprising the steps of surface-roughening an aluminum plate, anodizing the surface-roughened aluminum plate, surface treating the anodized aluminum plate with an aqueous polyvinyl phosphonic acid solution, and drying the resulting plate at from 150 to 230 ° C. to obtain the aluminum support.