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公开(公告)号：EP0939698B1
公开(公告)日：2003-09-24
申请号：EP98939401.0
申请日：1998-08-14
发明人： NGUYEN, My, T. , MERCHANT, Nishith , SHIMAZU, Ken-Ichi , PAPPAS, Peter, S. , HALLMAN, Robert, W. , KESSELMAN, Jerome, P. , SAVARIAR-HAUCK, Celin , HAUCK, Gerhard , TIMPE, Hans-Joachim
CPC分类号： B41C1/1008 , B41C2210/02 , B41C2210/06 , B41C2210/24 , B41C2210/262 , B41M5/36 , B41M5/368 , Y10S430/107 , Y10S430/145
摘要： A method for directly imaging a lithographic printing surface using infrared radiation without the requirement of pre- or post-UV-light exposure, or heat treatment employs a printing plate which contains a support with a hydrophilic surface overcoated with an imaging layer. The imaging layer contains at least one polymer having bonded pendent groups which are hydroxy, carboxylic acid, tert-butyl-oxycarbonyl, sulfonamide, amide, nitrile, urea, or combinations thereof; as well as an infrared absorbing compound. The imaging layer may contain a second polymer which has bonded pendent groups which are 1,2-naphthoquinone diazide, hydroxy, carboxylic acid, sulfonamide, hydroxymethyl amide, alkoxymethyl amide, nitrile, maleimide, urea, or combinations thereof. The imaging layer may also contain a visible absorption dye, a solubility inhibiting agent, or both. In practice, the imaging layer is imagewise exposed to infrared radiation to produce exposed image areas in the imaged layer which have transient solubility in aqueous alkaline developing solution so that solubility is gradually lost over a period of time until the imaged areas become as insoluble as non-imaged areas. Within a short time period of the imaging exposure, the imaged layer is developed with an aqueous alkaline developing solution to form the lithographic printing surface. In this method, the infrared radiation preferably is laser radiation which is digitally controlled.
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公开(公告)号：EP1011970B1
公开(公告)日：2006-02-08
申请号：EP99928429.2
申请日：1999-06-08
发明人： SHIMAZU, Ken-Ichi , PATEL, Jayanti , SARAIYA, Shashikant , MERCHANT, Nishith , SAVARIAR-HAUCK, Celin , TIMPE, Hans-Joachim , McCULLOUGH, Christopher, D.
IPC分类号： B41C1/10
CPC分类号： B41M5/42 , B41C1/1016 , B41C2201/04 , B41C2210/02 , B41C2210/06 , B41C2210/14 , B41C2210/24 , B41C2210/26 , B41C2210/262 , B41C2210/264 , B41C2210/266 , B41M5/368 , B41M5/44 , B41M5/465
摘要： A thermal lithographic printing plate, which can be imaged by thermal energy typically by imagewise exposure with an infrared emitting laser, a thermal printing head, etc., is made up of a hydrophilic substrate, and a composite layer structure composed of two layer coatings. Preferably, the first layer of the composite is composed of an aqueous developable polymer mixture containing a photothermal conversion material which is contiguous to the hydrophilic substrate. The second layer of the composite is composed of one or more non-aqueous soluble polymers which are soluble or dispersible in a solvent which does not dissolve the first layer. The plate is exposed with an infrared laser or a thermal print head, and upon aqueous development of the imaged plate, the exposed portions are removed exposing hydrophilic substrate surfaces receptive to conventional aqueous fountain solutions. The unexposed portions contain the ink-receptive image areas. The second layer may also contain a photothermal conversion material. Alternatively, the composite layer may be free of photothermal conversion material when thermal imaging is carried out using a thermal printing head.
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公开(公告)号：EP1011970A2
公开(公告)日：2000-06-28
申请号：EP99928429.2
申请日：1999-06-08
发明人： SHIMAZU, Ken-Ichi , PATEL, Jayanti , SARAIYA, Shashikant , MERCHANT, Nishith , SAVARIAR-HAUCK, Celin , TIMPE, Hans-Joachim , McCULLOUGH, Christopher, D.
IPC分类号： B41C1/10
CPC分类号： B41M5/42 , B41C1/1016 , B41C2201/04 , B41C2210/02 , B41C2210/06 , B41C2210/14 , B41C2210/24 , B41C2210/26 , B41C2210/262 , B41C2210/264 , B41C2210/266 , B41M5/368 , B41M5/44 , B41M5/465
摘要： A thermal lithographic printing plate, which can be imaged by thermal energy typically by imagewise exposure with an infrared emitting laser, a thermal printing head, etc., is made up of a hydrophilic substrate, and a composite layer structure composed of two layer coatings. Preferably, the first layer of the composite is composed of an aqueous developable polymer mixture containing a photothermal conversion material which is contiguous to the hydrophilic substrate. The second layer of the composite is composed of one or more non-aqueous soluble polymers which are soluble or dispersible in a solvent which does not dissolve the first layer. The plate is exposed with an infrared laser or a thermal print head, and upon aqueous development of the imaged plate, the exposed portions are removed exposing hydrophilic substrate surfaces receptive to conventional aqueous fountain solutions. The unexposed portions contain the ink-receptive image areas. Alternatively, the composite layer may be free of photothermal conversion material when thermal imaging is carried out using a thermal printing head.
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公开(公告)号：EP1654119A1
公开(公告)日：2006-05-10
申请号：EP04780824.1
申请日：2004-08-11
CPC分类号： B41C1/1016 , B41C2210/02 , B41C2210/06 , B41C2210/14 , B41C2210/22 , B41C2210/24 , B41C2210/262
摘要： Multilayer, positive working, thermally imageable, bakeable imageable elements are disclosed. The elements have a substrate, an underlayer, and a top layer. The underlayer comprises a polymeric material that comprises, in polymerized form about 5 mol% to about 30 mol% of methacrylic acid; about 20 mol% to about 75 mol% of N-phenylmaleimide, N-cyclohexylmaleimide, N-benzylmaleimide, or a mixture thereof; optionally, about 5 mol% to about 50 mol% of methacrylamide; and about 3 mol% to about 50 mol% of a compound represented by the formula: CH2C(R2)C(O)NHCH2OR1, in which R1 is C1 to C12 alkyl, phenyl, C1 to C12 substituted phenyl, C1 to C12 aralkyl, or Si(CH3)3; and R2 is H or methyl. Other materials, such as a resin or resins having activated methylol and/or activated alkylated methylol groups, such as a resole resin, may be present in the underlayer. The elements produce bakeable lithographic printing plates that are resistant to press chemistries.
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公开(公告)号：EP0939698A1
公开(公告)日：1999-09-08
申请号：EP98939401.0
申请日：1998-08-14
发明人： NGUYEN, My, T. , MERCHANT, Nishith , SHIMAZU, Ken-Ichi , PAPPAS, Peter, S. , HALLMAN, Robert, W. , KESSELMAN, Jerome, P. , SAVARIAR-HAUCK, Celin , HAUCK, Gerhard , TIMPE, Hans-Joachim
CPC分类号： B41C1/1008 , B41C2210/02 , B41C2210/06 , B41C2210/24 , B41C2210/262 , B41M5/36 , B41M5/368 , Y10S430/107 , Y10S430/145
摘要： A method for directly imaging a lithographic printing surface using infrared radiation without the requirement of pre- or post-UV-light exposure, or heat treatment employs a printing plate which contains a support with a hydrophilic surface overcoated with an imaging layer. The imaging layer contains at least one polymer having bonded pendent groups which are hydroxy, carboxylic acid, tert-butyl-oxycarbonyl, sulfonamide, amide, nitrile, urea, or combinations thereof; as well as an infrared absorbing compound. The imaging layer may contain a second polymer which has bonded pendent groups which are 1,2-naphthoquinone diazide, hydroxy, carboxylic acid, sulfonamide, hydroxymethyl amide, alkoxymethyl amide, nitrile, maleimide, urea, or combinations thereof. The imaging layer may also contain a visible absorption dye, a solubility inhibiting agent, or both. In practice, the imaging layer is imagewise exposed to infrared radiation to produce exposed image areas in the imaged layer which have transient solubility in aqueous alkaline developing solution so that solubility is gradually lost over a period of time until the imaged areas become as insoluble as non-imaged areas. Within a short time period of the imaging exposure, the imaged layer is developed with an aqueous alkaline developing solution to form the lithographic printing surface. In this method, the infrared radiation preferably is laser radiation which is digitally controlled.
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