Negative-working radiation-sensitive compositions and imageable materials

A composition and sensitive technology, applied in the application of radiation from radioactive sources, instruments, lithography equipment, etc., can solve the problems of digital speed loss, etc., and achieve the effect of good printability, high imaging sensitivity, and good shelf life

Active Publication Date: 2009-09-30
EASTMAN KODAK CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Attempts to eliminate this warm-up step have not been successful, as this often results in a loss of digital speed

Method used

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  • Negative-working radiation-sensitive compositions and imageable materials
  • Negative-working radiation-sensitive compositions and imageable materials
  • Negative-working radiation-sensitive compositions and imageable materials

Examples

Experimental program
Comparison scheme
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Embodiment approach

[0055] Accordingly, a number of initiator / co-initiator combinations can be used in various embodiments of the invention, namely:

[0056] a) the combination of the above-mentioned triazine and the above-mentioned co-initiator, which is the above-mentioned N-aryl, S-aryl or O-aryl polycarboxylic acid with at least two carboxyl groups, wherein at least one carboxyl group is bonded to On the nitrogen, oxygen or sulfur atoms of the aryl units (for example anilinodiacetic acid and its derivatives and other co-initiators),

[0057] b) a combination of the aforementioned triazines and co-initiators that are derivatives of the aforementioned thiols,

[0058] c) a combination of an iodonium salt as described above (e.g. iodonium borate) and a co-initiator that is a metallocene (e.g. titanocene or ferrocene) such as described above in US Pat. No. 6,936,384 (noted above), and

[0059] d) Combinations of iodonium salts as described above (eg iodonium borates) and co-initiators that are m...

Embodiment 1

[0174] Synthesis Example 1: Preparation of monomer A, tetraphenylboronic acid [3-(methacrylamido) propyl] trimethylammonium

[0175] In a 500 ml beaker labeled Container A, sodium tetraphenylborate (13.68 g, Aldrich Chemical Co.) was dissolved in 300 g of water. In a 1000 ml beaker labeled Vessel B, [3-(methacrylamido)propyl]trimethylammonium chloride (17.64 g, 50% in water, Aldrich Chemical Co.) was diluted in 500 g of water. The solution in vessel A was slowly (over approximately 10 minutes) added to the solution in vessel B while stirring vigorously by a Silverson L4R. A white precipitate formed and the mixture was stored in the refrigerator for 2 hours. After the first filtration, the white solid was collected and washed with 100 ml of water. The product was obtained from the second filtration and dried at ambient temperature over the weekend, then in an oven at 35°C for 4 hours to afford 20 g of a white solid.

Embodiment 2

[0176] Synthesis Example 2: Preparation of Polymer A

[0177] AIBN (1.6 g), methyl methacrylate (20 g), acrylonitrile (24 g), vinyl carbazole (18 g, from Polymer Dajac), methacrylic acid (18 g) and DMAC (320 g) were placed in a Magnetic stirring, temperature controller and N 2 Inlet in a 1000ml 3-neck flask. The mixture was heated to 60 °C under N 2 Stir under protection overnight (approximately 16 hours). The % non-volatiles were measured to be approximately 20%. The nitrogen blanket was removed and 5.2 g KOH in 40 g water was added. A viscous liquid formed. After stirring the mixture for 10 minutes, 13.3 g of allyl bromide was added and the mixture was stirred at 55° C. for 3 hours. A 36% HCl solution (12 g) in 40 g DMAC was added to the flask and stirred for an additional 3 hours. The reaction mixture was filtered to remove inorganic salts formed. This filtrate was then slowly dropped into a mixture of 12 liters of water and 20 g of 36% HCl solution while stirring. ...

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Abstract

A radiation-sensitive composition and negative-working imageable element includes a polymeric binder that has a hydrophobic backbone and pendant salt groups that comprise a cation covalently attached to the hydrophobic backbone and a boron-containing anion forming a salt with the cation. The use of these particular polymers provides fast digital speed (high imaging sensitivity) and good printability (good shelf-life) even when the preheat step normally used between exposure and development, is omitted.

Description

field of invention [0001] The present invention relates to negative-working radiation-sensitive compositions and imageable elements such as negative-working lithographic printing plate precursors exhibiting increased digital speed and good printability. The invention also relates to methods of using these imageable elements. Background of the invention [0002] Radiation-sensitive compositions are commonly used in the preparation of imageable materials, including lithographic printing plate precursors. Such compositions typically include a radiation-sensitive component, a free-radically polymerizable component, an initiator system, and a binder, each of which has been modified to provide various improvements in physical properties, imaging performance, and image characteristics. research focus. [0003] Recent developments in the field of printing plate precursors involve the use of radiation-sensitive compositions which can be imaged by means of lasers or laser diodes and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03F7/033B41C1/10
CPCG03F7/033B41C1/1008B41C1/1016B41C2201/02B41C2201/14B41C2210/04B41C2210/06B41C2210/08B41C2210/22B41C2210/24Y10S430/117Y10S522/904Y10S430/115
Inventor S·A·贝克利T·陶J·黄
Owner EASTMAN KODAK CO
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