Multilayer imageable element with improved chemical resistance

A technology of imaging components and components, which is applied to the formation of conductive patterns, the application of radioactive source radiation, temperature recording methods, etc., to achieve the effect of improving the printing resistance

Inactive Publication Date: 2008-11-05
EASTMAN KODAK CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although some progress has been made in various positive working imageable elements, there is still a need for both heat bakeability and resistance to printing chemicals, such as inks, fountain solutions, and solvents for cleaning such as UV ink cleaners Resistant Imageable Elements

Method used

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  • Multilayer imageable element with improved chemical resistance
  • Multilayer imageable element with improved chemical resistance
  • Multilayer imageable element with improved chemical resistance

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0119] Preparation of Imageable Elements

[0120] The imageable element can be formed by sequentially applying the inner layer formulation to the substrate surface (and providing any other hydrophilic layers thereon) and then applying the outer layer formulation to the inner layer using conventional coating or lamination methods. preparation. It is very important to avoid mixing the inner and outer formulations.

[0121] The inner and outer layers can be coated by dispersing or dissolving the desired ingredients in a suitable coating solution, and then applying the resulting formulation onto the substrate sequentially or simultaneously, using any suitable equipment or method, Examples include hang coater, knife coater, gravure coater, die coater, slot coater, rod coater, wire rod coater, roll coater, or extruder hopper coater cloth. The formulations can also be applied by spraying onto a suitable support such as an in-print printing cylinder.

[0122] The choice of solvent...

Embodiment 1 and comparative example 1-4

[0197] A coating solution of 1,3-dioxolane:PGME:γ-butyrolactone:water (65:15:10:10 by weight) containing the ingredients described in Table I below was applied to the on substrate A. The resulting polymer layer was dried at 135°C for 30 seconds. The coating thickness of each obtained polymer layer was 1.5 g / m 2 .

[0198]

[0199] Dried samples were subjected to the following tests:

[0200] Developer Solubility: Apply a few drops of 956 Developer at 2 second intervals for up to 30 seconds to the dry polymer layer and wash off immediately with water. The time for complete dissolution of the polymer layer was recorded.

[0201] Resistance to UV Ink Cleaner: A few drops of diacetone alcohol / water (4:1) were applied to each dried polymer layer at 1 minute intervals for up to 5 minutes and washed off immediately with water. The amount of polymer layer remaining was estimated after 5 minutes.

[0202] Resistance to alcohol-sub (alcohol-sub) fountain solution: several drops...

Embodiment 2 and comparative example 5

[0215] A coating formulation containing the components described in Table V below was formulated, coated on Substrate A, and dried as described in Inventive Example 1. The coating weight of the resulting polymer layer was 1.5 g / m 2 . The dried polymer layer was evaluated using the same test described above in Inventive Example 1 and the results are shown in Table VI below.

[0216]

[0217] The top layer formulation (diethyl ketone) described in Table VII below was coated on the above dried polymer layer by wire wound rod. The formulation concentration is selected to provide a coating weight of 0.7g / m 2 dry film. The top coat was dried at 135°C for 30 seconds.

[0218] Table VII

[0219]

[0220] The resulting imageable elements were evaluated using the same test described above in Inventive Example 1 and the results are shown in Table VIII below.

[0221] Table VIII

[0222]

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Abstract

Positive-working imageable elements comprise a radiation absorbing compound and inner and outer layers on a substrate having a hydrophilic surface. The inner layer comprises a polymer that is removable using an alkaline developer and in which from 1 to 50 mol % of its recurring units are derived from one or more of the ethylenically unsaturated polymerizable monomers represented by the following Structure (I): CH2=C(R<1>)C(=O)NR<2>(CR<3>R<4>)nOH (I) wherein R<1,>R<2 >, R<3> and R<4> are independently hydrogen, lower alkyl, or phenyl, and n is 1 to 20. The imageable elements having improved resistance to development and printing chemicals and solvents.

Description

technical field [0001] The present invention relates to positive working imageable elements having improved thermal bakeability and chemical resistance. The invention also relates to methods of using these elements to prepare lithographic printing plates and to obtain images from these printing plates. Background technique [0002] In conventional or "wet" lithography, ink-receptive areas, ie, imaged areas, are formed on a hydrophilic surface. When a surface is wetted by coating it with water and ink, the hydrophilic areas retain the water and repel the ink, while the ink-receptive areas retain the ink and repel the water. The ink is transferred to the surface of the material from which the image will be reproduced. For example, the ink is first transferred to an intermediate blanket, which then transfers the ink to the surface of the material from which the image will be reproduced. [0003] Imageable elements useful in preparing lithographic printing plates typically co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41M5/36B41C1/10H05K3/12
CPCB41M5/368B41C1/1016Y10S430/165B41C2210/02B41C2210/06B41C2210/14B41C2210/22B41C2210/24B41C2210/262
Inventor K·B·雷E·L·谢里夫J·雷A·克雷布斯
Owner EASTMAN KODAK CO
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