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Thermally sensitive multilayer imageable element and the method

A technology for imaging components and components, which can be used in electrical components, diazonium compound components, semiconductor/solid-state device manufacturing, etc., and can solve the problem of high rejection rate

Inactive Publication Date: 2009-12-02
EASTMAN KODAK CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to this failure mode, the reject rate for multilayer thermal imageable elements may be higher relative to single layer thermal imageable elements with a much thicker top layer

Method used

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  • Thermally sensitive multilayer imageable element and the method
  • Thermally sensitive multilayer imageable element and the method
  • Thermally sensitive multilayer imageable element and the method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-6

[0195] These examples show that novolac resins with increasing p-cresol content have improved developer resistance and, thus, increased ability to withstand abrasion over novolak resins with only m-cresol.

[0196] lining Floor Using a wire-wound rod, combine 85 parts by weight of adhesive in 15:20:5:60 (w:w) butyrolactone:methyl ethyl ketone:water:1-methoxy-2-propanol. A coating solution of Agent A and 15 parts by weight of IR Dye A was coated on Base Layer A. The final element, including the liner and bottom layer, was dried at 100°C for 90 seconds. The coating weight of the final liner is 2.0g / m 2 .

[0197] top floor Using a wire-wound rod, a coating solution comprising 96.3 parts by weight of novolac resin and 3.7 parts by weight of ethyl violet in diethyl butanone was coated onto the liner. The coating weight of the final top layer is 0.7g / m 2 . The final imageable element was dried at 100°C for 90 seconds. The resins used are shown in Table 1.

[0198] Each...

Embodiment 3

[0202] Example 3 (3,300 MW novolac resin) had the same developer resistance as Example 1 (10,000 MW novolak resin). Example 3 has a 50% p-cresol content while Example 1 has 0 p-cresol content.

Embodiment 6

[0203] Example 6 (8,000 MW novolac resin) had the same developer resistance as Example 4 (13,000 MW novolak resin). Example 6 has a 47% p-cresol content while Example 4 has 0 p-cresol content.

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PUM

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Abstract

Multilayer positive-working thermal imageable elements that can serve as lithographic printing plate precursors are disclosed. The element includes a bottom layer, a liner on the bottom layer, and a top layer on the liner. The top layer comprises (a) a solvent-soluble novolak resin having a weight average molecular weight of at least 10,000, its derivatives functionalized with polar groups, or its derivatives functionalized with tetrahydrogen bonders; (b) comprising Solvent-soluble m-cresol / p-cresol novolak resins with at least 10 mol % p-cresol and a weight average molecular weight of at least 8,000, derivatives thereof functionalized with polar groups, or derivatives thereof functionalized with tetrahydrogen bonders derivatives; or (c) mixtures thereof. The imageable elements have increased abrasion resistance and are therefore less prone to damage when handled.

Description

technical field [0001] The present invention relates to lithographic printing. More particularly, the present invention relates to positive working multilayer thermally imageable elements having a top layer comprising a novolac resin. Background technique [0002] In lithography, ink-receiving areas called image areas are formed on a hydrophilic surface. When the surface is wetted with water and ink is applied, the hydrophilic regions retain water and repel ink, while the ink-receiving regions accept ink and repel water. The ink is transferred to the surface of the material on which the image will be reproduced. Typically, the ink is first transferred to an interbed, which then transfers the ink to the surface of the material on which the image will be reproduced. [0003] Imageable elements used as lithographic printing plates, also referred to as printing plate precursors, typically include a top layer applied to the surface of a hydrophilic substrate. The top layer co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41C1/10G03C1/52G03F7/004G03F7/021G03F7/26G03F7/30
CPCB41C2210/22G03C1/49863B41C2210/14B41C2210/02B41C2210/24B41C2210/06B41C1/1016B41C2210/262
Inventor 安东尼·P.·基特森凯文·B.·雷尤金·L.·谢里夫
Owner EASTMAN KODAK CO