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Volume: 27 | Article ID: art00066_1
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A Modified Phenolic Resin and its Effectiveness as Polymer Binder in Thermo-Sensitive Imaging Composition
Jialing Pu
Zhongxiao Li
  DOI :  10.2352/ISSN.2169-4451.2011.27.1.art00066_1  Published Online :  January 2011
Abstract

The performances of CTP plate depend heavily on polymer binder and those capable of producing large image contrast by exposure are keys to quality plate. This research proposed a polymer resin containing hydrophilic spices in the side chain which could be sheltered by the thermal induced crosslinking reaction during plate manufacturing process and released upon imaging exposure. The resin was prepared through esterification reaction of maleic anhydride with phenolic resin, and its chemical structure was characterized by IR spectrum. Plate coatings were formulated with the modified polymer as binder resin, 2,2-bis(4-(2-(vinyloxy)ethoxy)phenyl)propane as the crosslinking agent, a near infrared absorbing dye and crystal violet as the tracing agent. Solubility of the exposed and unexposed coatings in diluted aqueous alkaline was investigated in situ using a home-made dissolving rate tester. It was found that polymer containing 4-6% mole carboxyl groups led to high image contrast and this contribution came directly from the cross-linking and decrosslinking reactions. Preliminary test indicated that this polymer coating generated positive image of high contrast after exposure and could be used as CTP plate coating for thermal laser imaging.

Journal Title : NIP & Digital Fabrication Conference
Publisher Name : Society of Imaging Science and Technology
Publisher Location : 7003 Kilworth Lane, Springfield, VA 22151, USA
Subject Areas :
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 DOI 10.2352/ISSN.2169-4451.2011.27.1.art00066_1
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Jialing Pu, Zhongxiao Li, "A Modified Phenolic Resin and its Effectiveness as Polymer Binder in Thermo-Sensitive Imaging Composition"  in Proc. IS&T Int'l Conf. on Digital Printing Technologies and Digital Fabrication (NIP27),  2011,  pp 259 - 262,  https://doi.org/10.2352/ISSN.2169-4451.2011.27.1.art00066_1

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Copyright © Society for Imaging Science and Technology 2011
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NIP & Digital Fabrication Conference
nip digi fabric conf
2169-4451
Society of Imaging Science and Technology
7003 Kilworth Lane, Springfield, VA 22151, USA
2169-4451(20110101)2011:1L.259;1-
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Articles
A Modified Phenolic Resin and its Effectiveness as Polymer Binder in Thermo-Sensitive Imaging Composition
PuJialing
LiZhongxiao
01012011
2011
1
259
262
2011
The performances of CTP plate depend heavily on polymer binder and those capable of producing large image contrast by exposure are keys to quality plate. This research proposed a polymer resin containing hydrophilic spices in the side chain which could be sheltered by the thermal induced crosslinking reaction during plate manufacturing process and released upon imaging exposure. The resin was prepared through esterification reaction of maleic anhydride with phenolic resin, and its chemical structure was characterized by IR spectrum. Plate coatings were formulated with the modified polymer as binder resin, 2,2-bis(4-(2-(vinyloxy)ethoxy)phenyl)propane as the crosslinking agent, a near infrared absorbing dye and crystal violet as the tracing agent. Solubility of the exposed and unexposed coatings in diluted aqueous alkaline was investigated in situ using a home-made dissolving rate tester. It was found that polymer containing 4-6% mole carboxyl groups led to high image contrast and this contribution came directly from the cross-linking and decrosslinking reactions. Preliminary test indicated that this polymer coating generated positive image of high contrast after exposure and could be used as CTP plate coating for thermal laser imaging.