Patent claim: A method according to any preceding claim wherein the binder polymer D is a methacrylic resin or a polyvinyl butyral resin.

Related passage: The obtained samples were overcoated with an aqueous solution of polyvinyl alcohol Celvol 203 from Air Products having a hydrolysis degree of 88 to get a printing plate precursor having a dry coating weight after drying for 4 minutes at 90C as shown in Table 1.Table 1 Plates for examples and comparative examplesplatephotopolymer layer coating weight of the photopolymer layer coating weight of the overcoat layer exposure step preheat step1 Table 2 1.5 gm2 3 gm2 405 nm 30 mW platesetter ANDROMEDA from Lithotech 90C for 2 min2 Table 3 1.5 gm2 3 gm2 405 nm 30 mW platesetter ANDROMEDA from Lithotech 90C for 2 min3 Table 4 1.5 gm2 3 gm2 Trendsetter 3244 from Creo 830 nm 50 to 75 mJcm2 90C for 2 min4 Table 5 1.5 gm2 3 gm2 Trendsetter 3244 from Creo 830 nm 50 to 75 mJcm2 90C for 2 minTable 2 Photosensitive composition 1 for a photopolymer layer sensitized to 405nm1.2 g of a 30 propylen glycol mono methyl ether solution of a terpolymer prepared by polymerization of 470 parts by wt.styrene 336 parts by wt.methyl methacrylate and 193 parts by wt.methacrylic acid0.1 g Kayamer PM2 ester of 1 mol phosphoric acid and 1.5 mol hydroxyethylmethacralyte0.20 g mercapto3triazol3.92 g of a 80 methyl ethyl ketone solution of an urethane acrylate prepared by reacting Desmodur N 100 available from BAYER Germany comprising hydroxy ethyl acrylate and pentaerythritol triacrylate having a doublebond content of 0.5 double bonds100 g when all isocyanate groups are completely reacted with the hydroxy group containing acrylates0.45 g ditrimethylolpropane tetraacrylate1.25 g of a dispersion in propylen glycol mono methyl ether containing 7.25 wt of copper phthalocyanine and 7.25 wt of a polyvinylacetal binder containing 39.9 mol vinyl alcohol 1.2 mol vinylacetate 15.4 mol acetal groups from acetaldehyde 36.1 mol acetal groups from butyraldehyde and 7.4 acetal groups from 4formylbenzoic acid0.7 g 2phenyl42chlorophenyl54NNdiethylaminophenyloxazole130.19 g 22bis2chlorophenyl4545tetraphenyl2H12biimidazolyl20 ml propylene glycol monomethyl ether16 ml methanol25 ml methyl ethyl ketonTable 3 Photosensitive composition 2 for a photopolymer layer sensitized to 405nm0.22 g Copolymer of 80 mole allyl methacrylate and 20 mole methacrylic acid with an acid number of 95 mg KOH1 g0.1 g Kayamer PM2 1 mole phosphoric acid esterified with 1.5 moles hydroxyethyl methacrylate available from Coa Corp.Ltd.Japan0.31 g mercapto124triazole2.3 g of a dispersion in propylene glycol monomethyl ether comprising 21.1 wt.copper phthalocyanine and 2.1 wt.of a polyvinylacetal binder comprising 39.9 mole vinyl alcohol groups 1.2 mole vinyl acetate groups 15.4 mole acetal groups derived from acetaldehyde 36.1 mole acetal groups derived from butyric aldehyde and 7.4 mole acetal groups derived from 4formylbenzoic acid15.25 g of a 29.8monomer solution made by the reaction of 16.82 g hexamethylene diisocyanate 13.01 g of hydroxyethylmethacrylate 6.46 g of 22hydroxyethylpiperidine in 85 g methyl ethyl ketone using 0.1 g of dibutyltin dilaurate catalyst0.7 g 2phenyl42chlorophenyl54NNdiethylaminophenyloxazole130.17 g 22bis2chlorophenyl4545tetraphenyl2H12biimidazolyl22.8 ml propylene glycol monomethyl ether16.3 ml methanol26 ml methyl ethyl ketone0.22 g Copolymer of 80 mole allyl methacrylate and 20 mole methacrylic acid with an acid number of 95 mg KOH1 gTable 4 Photosensitive composition 3 for a photopolymer layer sensitized to 810...830 nm3.0 g Ionacryl 683 acrylic acid copolymer available from SC Johnson ampSon Inc having an acid number of 180 mg KOHg4.4 g AC 50 methacrylic acid copolymer available from PCAS having an acid number of 48 mg KOHg 70 wt.solution in methyl glycol8.4 g of a 80 methyl ethyl ketone solution of a urethane acrylate prepared by reacting 1methyl24bisisocyanate benzene Desmodur N100 available from Bayer with hydroxy ethyl acetate and pentaerythritol triacrylate having a doublebond content of 0.50 double bonds100 g when all isocyanate groups are completely reacted1.4 g dipentaerythritol pentaacrylate0.75 g 24methoxyphenyl46bistrichlormethylstriazine0.3 g Renol Blue B2G HW copper phthalocyanine pigment preparation with polyvinyl butyral available from Clariant0.4 g anilino diacetic acid0.25 g 222thiophenyl3213dihydro133trimethyl2Hindol2ylideneethylidene1cyclohexen1ylethenyl133trimethyl3Hindoliumchloride100 ml solvent comprising 30 parts by volume methyl glycol 45 parts by volume methanol 25 parts by volume methyl ethyl ketoneTable 5 Photosensitive composition 4 for a photopolymer layer sensitized to 810...830 nm6.3 g JONCRYL 683 acrylic acid copolymer of the company SC Johnson USA acid number175 mg KOHg9.0 g AC 50 methacrylic acid copolymer of the company PCAS France acid number48 mg KOHg 70 wt.solution in ethylene glycol monomethyl ether1.4 g dipentaerythritol pentaacrylate16.8 g urethane acrylate 80 solution in methyl ethyl ketone prepared by reacting Desmodur N100 of the company Bayer with hydroxyethyl acrylate and pentaerythritol triacrylate amount of double bonds 0.5 double bonds per 100 g when all isocyanate groups have reacted1.8 g 24ethenylbenzyl5mercapto134thiadiazol0.45 g 222thiophenyl3213dihydro133trimethyl2Hindole2ylideneethylidene1cyclohexene1ylethenyl133trimethyl3Hindoliumchloride2.5 g 24methoxyphenyl46bistrichloromethyl135triazine and0.4 g BASONYL VIOLET 610 Basic Violet 3 C.I.42555 available from Bayer Germany