Agfa Patente

A UV curable composition containing a mixture of free radical polymerizable monomers and a APO photoinitiator according to formula (I): <img class="EMIRef" id="5f39f83d-299c-4f56-81e0-bb8b15c82811-ia01" /> wherein R1 is selected from the group consisting of an alkyl group, an alkenyl group, an alkynyl group, an aralkyl group, an alkaryl group and an aryl group or a heteroaryl group; R2 and R3 are independently selected from an alkyl group and an alkoxy group; R4 is selected from a hydrogen, an alkyl group and an alkoxy group; X and Y are independently selected from an oxygen atom, a methylene group, a - C(=CH2)- group, and a carbon atom present in a group selected from a straight chain alkylene group, an alkenylene group, an arylene group, a heteroarylene group and a cycloalkylene group; L represents a divalent linking group selected from the group consisting of an unsubstituted alkylene group, an arylene group, a heteroarylene group, a cycloalkylene group, a substituted alkylene group substituted by one or more ether groups, a substituted alkylene group substituted by one or more substituents selected from the group consisting of an aryl group, a heteroaryl group, an arylene group, a heteroarylene group, a cycloalkylene group, an ester group, an amide group, an amine group, an ether group, a thioether group, a ketone group, an aldehyde group, a sulfoxide group, a sulfone group, a sulfonate ester group, a sulphonamide group, -Cl, -Br, -I, -OH, - SH, -CN and -NO<2>; and wherein the UV curable composition is free of a photoinitiator including 2 monoacyl phosphine oxide moieties linked to each other via their acyl group and wherein the 2 monoacyl phosphine oxide moieties have a chemical structure differing in the phosphine oxide part. Cured products and inkjet printing methods with the radiation curable compositions are also disclosed.

An image recording method comprising the following steps: i) applying an aqueous pre-treatment liquid onto at least a part of a recording region S of a surface of a substrate; and ii) attaching an aqueous inkjet ink onto at least a part of the recording region S, the aqueous inkjet ink comprises indigo pigment particles selected from a synthetic process or a bio-based process, a polymeric dispersant and a water-soluble organic solvent, the indigo pigment particles have an average particle size equal to 30 nm or more and equal to 1000 nm or less, the polymeric dispersant is a block co-polymer having an average molecular weight equal to 1.2 kDa or more and comprises a hydrophobic block and a hydrophilic block. An ink set containing the aqueous inkjet ink comprising indigo pigment particles selected from a bio-based process, a polymeric dispersant and a water-soluble organic solvent is also provided.

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The present invention is a method of preparing a Time Temperature Indicator using inkjet printing. The aqueous inkjet printing liquid includes encapsulated diacetylene compounds.

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A lithographic printing plate precursor is disclosed including a support and a coating comprising (i) a photopolymerisable layer including a polymerisable compound and a photoinitiator, and a toplayer provided above the photopolymerisable layer;characterized in that the toplayer includes a halogenated polymer and a nitrite and/or nitrate salt.

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A radiation curable inkjet ink comprising a polymerizable compound, a phenolic resin and a thermal cross-linking agent, characterized in that the phenolic resin includes at least one structural moiety according to Formula I, <img class="EMIRef" id="4c241aa8-ebac-4230-a750-f844765748be-ia01" /> wherein L represents a divalent linking group having no more than 10 carbon atoms; n represents 0 or 1; R1 and R2 independently from each other represent a group selected from the group consisting of a hydrogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkynyl group, a substituted or unsubstituted alkaryl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted (hetero)aryl group and a substituted or unsubstituted alkoxy group.

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A drive circuit for charging a printhead for ejecting drops of ink is provided, the printhead having a capacitance. The drive circuit comprises a power supply comprising a first connection and a second connection. An inductor is connected to the first connection of the power supply, wherein the inductor is connected to a first drive connection of the printhead to provide a charge path for current to charge the capacitance. The second connection of the power supply is connected to a second drive connection of the printhead. The drive circuit also comprises means for applying a plurality of charging voltage pulses to the inductor to provide a single charge of the capacitance for a single cycle of ink ejection from the printhead. A method of operating the drive circuit is also provided.

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An ink set for manufacturing decorative laminates including pigmented free radical curable inkjet inks and a free radical curable liquid, wherein the pigmented free radical curable inkjet inks include a colour pigment and a polymerizable composition containing 10 to 90 wt% of one or more monofunctional polymerizable compounds; wherein the free radical curable liquid includes a polymerizable composition containing 15 wt% or more of polyfunctional polymerizable compounds and 15 wt% or more of a specific monofunctional polymerizable compound; and wherein all weight percentages wt% are based upon the total weight of the polymerizable composition in the pigmented free radical curable inkjet ink or the polymerizable composition in the free radical curable liquid;

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