Abstract:
The invention provides a hydrophilic film obtained by curing, by at least one energy source selected from heat and light, a composition comprising a compound that has, in a molecule thereof, two or more ring structures selected from the group consisting of five-membered structures and six-membered structures, wherein the ring structures have a hydrophilic group. The invention further provides a planographic printing material having at least a substrate and the hydrophilic film formed on the substrate. The invention further provides a method for forming a planographic printing plate including at least forming an ink receiving portion on a planographic printing material by applying a hydrophobic material by an ink jet recording process.
Abstract:
An ink composition comprising a triarylsulfonium salt polymerization initiator containing at least one aryl skeleton having an electron attractive group as a substituent, a polymerizable compound, a sensitizing dye, and a colorant.
Abstract:
A process for producing a heat mode-compatible positive planographic printing plate precursor comprising a support and a photosensitive layer whose solubility in an aqueous alkali solution increases upon heat-mode exposure, which includes: applying a photosensitive layer coating solution onto the support, and drying the photosensitive layer coating solution at a drying temperature not less than 150° C. and not greater than 200° C. and for a drying time of 110 seconds or less.
Abstract:
A polymerizable composition including a hydrophilic polymer (A) having a radical polymerizable group on the terminal, a radical polymerizable compound (B), and a polymerization initiator (C); a hydrophilic film formed by curing a film by application of light or heat, which film includes the polymerizable composition; and a planographic printing plate precursor including a support and the hydrophilic film formed on or above the support.
Abstract:
A lithographic printing plate precursor comprising a support having a hydrophilic surface having provided thereon an image-forming layer containing a hydrophobic high molecular compound having at least either a functional group represented by formula (1) or a functional group represented by formula (2): wherein X+ represents an iodonium ion, a sulfonium ion or a diazonium ion.
Abstract:
This invention describes a heat sensitive composition comprising: (A-I) a compound which is represented by the following general formula (I) and generates a radical when heated, and (B-I) a compound having physical and chemical properties that are changed irreversibly by a radical, R—SO2−M+ General formula (I) wherein R represents an alkyl group or aryl group, and M+ represents a counter cation selected from sulfonium, iodonium, diazonium, ammonium and azinium; and a negative planographic printing plate precursor which can be recorded by heat mode using this composition. This invention also describes a planographic printing plate precursor comprising a substrate having disposed thereon a photosensitive layer containing (C-II) a light-heat converting agent, (B-II) a compound having a polymerizable unsaturated group, and (A-II) an onium salt having at least two cation parts in one molecule.
Abstract:
A heat-sensitive composition comprising a compound of a specific general formula which generates an acid or radical when heated, and a compound whose physical and chemical properties are irreversibly changed by an acid or radical.
Abstract:
An engine reverse rotation prevention apparatus provided in an engine having valve opening and closing means which is in slidable contact with a cam provided on a camshaft. The valve opening and closing means is interconnected with a valve. The engine reverse rotation prevention apparatus comprises a release cam of a reverse rotation prevention release lever supported on the camshaft, which is in contact with a cam base of a cam provided on the camshaft. The release cam is provided with a cam lobe that protrudes from the profile of the cam base and rotates in the opposite direction to that of the camshaft when the engine rotates in a reverse direction. Thus, the reverse rotation of the engine is prevented.