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Radiation curable inkjet fluids and inks improved for photoyellowing

A radiation-cured, inkjet ink technology, applied in inks, household appliances, applications, etc., can solve problems such as hindering substrate processing, not getting uniform spreading and adhesion of ink, increasing cost, complexity and maintenance

Active Publication Date: 2010-09-15
AGFA NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] Corona discharge treatment and plasma treatment will increase the cost, complexity and maintenance of the equipment used to treat the substrate
The substrate may contain a large amount of impurities or irregularities, which may prevent the substrate from being handled and thus not obtain uniform spreading and adhesion of the ink

Method used

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  • Radiation curable inkjet fluids and inks improved for photoyellowing
  • Radiation curable inkjet fluids and inks improved for photoyellowing
  • Radiation curable inkjet fluids and inks improved for photoyellowing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0329] This example illustrates the effect on photoyellowing and adhesion of using a photoinitiator comprising a tertiary amine group in combination with a radiation curable composition comprising VEEA and TMPTA.

[0330] Preparation of Pigment Dispersion CPD1

[0331] Use DISPERLUX in a 6L container TM Disperser (from DISPERLUX S.A.R.L., Luxembourg) 500 g of polymeric dispersant DB162 and 33 g of polymerization inhibitor Genorad™ 16 were dissolved in 3870 g of DPGDA. Add 1000 g of cyan pigment PB15:4 to the solution and stir for 30 minutes. The vessel was then connected to a Bachofen DYNOMILL ECMPilot mill with an internal volume of 1.5 L, 42% filled with 0.4 mm yttrium stabilized zirconia beads ("High Abrasion Resistant Zirconia Grinding Media", from TOSOH Co.) . The mixture was circulated through the mill for 2 hours and 18 minutes at a flow rate of about 2 L per minute and a rotational speed of about 13 m / s in the mill. 1667 g of a 30% by weight DB162 / DPGDA solution ...

Embodiment 2

[0354] This example demonstrates that good adhesion on a broad range of substrates is obtained only when a photoinitiator comprising a tertiary amine group is used in combination with a radiation curable composition comprising a vinyl ether acrylate and a multifunctional acrylate.

[0355] Preparation of Pigment Dispersion CPD2

[0356] In a 50L container, 4200g polymeric dispersant S35000 and 420g polymerization inhibitor Genorad TM 16 was dissolved in 11680 g DPGDA. Add 8400g of cyan pigment PB15:4 to the solution and use DISPERLUX TM A disperser (from DISPERLUX S.A.R.L., Luxembourg) stirred for 10 minutes. The vessel was then connected to a Bachofen DYNOMILLECM POLY mill with an internal volume of 8.2 L, 42% filled with 0.4 mm yttrium stabilized zirconia beads ("High Abrasion Resistant Zirconia Grinding Media", from TOSOH Co.) . The mixture was circulated through the mill at a flow rate of about 10 L per minute and a rotational speed of about 15 m / s in the mill for 2...

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Abstract

A radiation curable inkjet fluid including a radiation curable composition comprising at least 25 wt% of a vinylether acrylate and at least 15 wt% of a polymerizable compound comprising at least three acrylate groups, both based upon the total weight of the radiation curable composition; and a photoinitiator comprising a tertiary amine group and 0 to 3 wt% of isopropylthioxanthone based upon the total weight of the radiation curable inkjet fluid. An inkjet printing method is also disclosed.

Description

technical field [0001] The present invention relates to radiation curable inkjet fluids and inks with reduced photoyellowing and improved adhesion. Background technique [0002] In inkjet printing, droplets of ink fluid are projected directly onto the ink-receiver surface without physical contact between the printing device and the ink-receiver. A printing device electronically stores printing data and controls the mechanisms that eject ink droplets in images. Printing is accomplished by moving the printhead across the ink-receiver, or vice versa, or both. [0003] When jetting an inkjet ink onto an ink-receiver, the ink typically contains a liquid carrier and one or more solids such as dyes or pigments and a polymer. Ink compositions can be roughly divided into: [0004] For water-based inks, the drying mechanism involves absorption, penetration and evaporation; [0005] For solvent-based inks, drying mainly involves evaporation; [0006] With oil-based inks, drying in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/10
CPCC09D11/101
Inventor J·洛库菲尔I·胡格马滕斯
Owner AGFA NV
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