Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D285/00—Heterocyclic compounds containing rings having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by groups C07D275/00 - C07D283/00
  • C07D285/01—Five-membered rings
  • C07D285/02—Thiadiazoles; Hydrogenated thiadiazoles
  • C07D285/04—Thiadiazoles; Hydrogenated thiadiazoles not condensed with other rings
  • C07D285/12—1,3,4-Thiadiazoles; Hydrogenated 1,3,4-thiadiazoles
  • C07D285/125—1,3,4-Thiadiazoles; Hydrogenated 1,3,4-thiadiazoles with oxygen, sulfur or nitrogen atoms, directly attached to ring carbon atoms, the nitrogen atoms not forming part of a nitro radical
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D285/00—Heterocyclic compounds containing rings having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by groups C07D275/00 - C07D283/00
  • C07D285/01—Five-membered rings
  • C07D285/02—Thiadiazoles; Hydrogenated thiadiazoles
  • C07D285/04—Thiadiazoles; Hydrogenated thiadiazoles not condensed with other rings
  • C07D285/12—1,3,4-Thiadiazoles; Hydrogenated 1,3,4-thiadiazoles
  • C07D285/125—1,3,4-Thiadiazoles; Hydrogenated 1,3,4-thiadiazoles with oxygen, sulfur or nitrogen atoms, directly attached to ring carbon atoms, the nitrogen atoms not forming part of a nitro radical
  • C07D285/135—Nitrogen atoms
• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
  • G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
  • G03F7/004—Photosensitive materials
  • G03F7/06—Silver salts
  • G03F7/063—Additives or means to improve the lithographic properties; Processing solutions characterised by such additives; Treatment after development or transfer, e.g. finishing, washing; Correction or deletion fluids
  • G03F7/066—Organic derivatives of bivalent sulfur, e.g. onium derivatives

Definitions

• the invention relates to a method for improving planographic printing plates having an aluminium support.
• photographically produced silver images can be transformed into heavy metal and/or silver salt images by oxidation.
• the resulting images can be reacted with an organic compound containing an SH-, SeH- or NH-group to produce sparingly soluble salt like compounds which take up greasy printing inks.
• photographic silver images can be deposited by the silver salt diffusion process on to unprepared aluminium plates having a rough surface and which are suitable for planographic printing.
• the silver images can be made water-repellent by treating them with an organic compound which is capable of being adsorbed by metallic silver so as to render the images capable of taking up greasy printing inks. In this way planographic printing plates are obtained.
• Suitable organic compounds which are capable of being adsorbed by metallic silver described in the copending application Serial No. 730,259, now US.
• Patent 3,083,097 are 2,5-dimercapto-1,3,4-thiodiazole, S-mercapto-B-phenyl- 1,3,4-thiodiazo1ethione-2,5 mercaptotetrazole, l-p'henyl- S-mercaptotetrazole, 3-mercapto-1,2,4-triazole, l-phenyl- 3-mercapto-l,2,4-triazole, 2,4,6-trimercapto-1,3,5-triazine, 2-mercapto-4,5-dimethyl-fi-oxypyrimidine, 6 mercaptopurine, tetraethyl thiuram disulphide, thiourea, phenyl thiourea, phenyl thiosemicarbazide, diphenyl thiosernicarbazide, diphenyl thiocarbazone, diphenyl carbazide and compounds of the general formula wherein R represents an alkyl
• the organic compounds employed for the purpose of making the silver images water-repellent are soluble or are capable of being suspended in the fixing solutions normally employed in planographic printing.
• Especialy suitable are aqueous solutions'ofgum arabic, polyvinyl alcohol and carboxymethyl cellulose, which are adjusted to a pH of from 4 to 6 by means of phosphoric acid or a phosphate. This adjustment of the pH is effected in the absence of an organic solvent, since organic solvents dissolve the printing inks.
• N'-Ifi1 NN HS-(l) wherein Z stands for (I) alkylene with 1 to 6 carbon wherein n is an integer, preferably from 1 to 5, and m is an integer from 2 to 4, or (III) NH.B.NH', wherein B stands for alkylene with 4 to 10 carbon atoms, cycloalkylene or arylene.
• the product is In Order to P F stablesuspenswns of the precipitated by stirring the reaction mixture into aqueous Pounds 111 the acid fiXlng sollltlons, the Compounds must hydrogen chloride which is cooled with ice.
• the precipibe emulsified by means of emulsifiers, preferably anionictated product is suction-filtered and washed free from 55 active emulsifiers. Suitable emulsifiers and emulsifyhalogen.
• the raw material is purified by reprecipitation. ing auxiliaries are given in Table 4.
• Examlple 1 50 g. of the aforementioned compound V are suspended in 100 cc. of Emulgator (i.e. Table 4 #4), preferably in a mixing apparatus, for example in a cutting mill, vibrating mill, high-pressure homogenizer, a turbulence chamber equipped with a high speed stirrer or a roll stand having three rollers.
• the homogeneous suspension is dispersed in 4900 cc. of a 10% aqueous polyvinyl alcohol solution and the dispersion is adjusted to a pH of 4.4 by means of 10% phosphoric acid.
• a silver image produced on an aluminum offset plate by the silver salt diffusion process is rubbed with the above dispersion. The excess dispersion is wiped off with a moist sponge, whereupon the plate is used for printing.
• Example 2 75 g. of the aforementioned compound IV (see Table 2) are suspended in 150 cc. of a 50% aqueous solution of Monopolbrillantol (i.e. Table 4, #1) in a mixing apparatus. The homogeneous mixture is dispersed in 4850 cc. of a 7% aqueous carboxymethyl cellulose solution. The dispersion is adjusted to a pH of 5.2 by means of 10% phosphoric acid. The dispersion is employed as in Example 1.
• Example 3 100 g. of the aforementioned compound X (see Table 2) are mixed with 20 cc. of Teepol (20%, normal commercial type), 200 cc. of polyglycol P 400 and 100 g. of aqueous gum arabic solution (1:1) in a ball mill for 3 hours. The homogeneous mixture is dispersed in 4800 cc. of a 2.0% aqueous carboxymethyl cellulose solution and the dispersion is adjusted to a pH of 4.6 by means of 10% phosphoric acid. The dispersion is employed as in Example 1.
• Example 4 .50 g. of the aforementioned compound VII (see Table 2) are mixed with 7.5 cc. of Teepol, 50 cc. of Polyglycol P 400 and 50 cc. of a 10% aqueous solution of Luviskol K 90 (polyvinyl pyrrolidone, molecular weight about 700,000, manufactured by BSAF) in a mixing apparatus and dispersed in 4900 cc. of a 2.5% aqueous carboxymethyl cellulose solution. The dispersion is adjusted to a pH value of 4.1 With 10% phosphoric acid. The dispersion is employed as in Example 1.
• Luviskol K 90 polyvinyl pyrrolidone, molecular weight about 700,000, manufactured by BSAF
• Example 5 A silver image produced on an aluminium offset plate by the silver salt diffusion process is treated with a solution of 5 g. of the aforementioned compound VI (see Table 2) dissolved in 100 cc. of 1.8% caustic potash solution. After the plate has been made water-repellent in this way, it rubbed with a 25% aqueous gum arabic solution which is adjusted to a pH value of 4.0 with phosphoric acid. The plate is then used for printing.
• Example 6 40 g. of the aforementioned compound V (see Table 2) are suspended in 100 cc. of 2% aqueous solution of Tamol NNO and then dispersed in 4900 cc. of a aqueous Luviskol K 90 solution (BASF), which is adjusted to a pH value of 4.3 with 10% phosphoric acid. The resulting dispersion is employed as in Example 1.
• BASF a aqueous Luviskol K 90 solution
• Example 7 50 g. of the aforementioned compound VII (see Table 2) are suspended in 2.5 cc. of Teepol, 2.5 cc. of 20% Hostapan A and 100 cc. of Polyglycol P 400. The resulting suspension is dispersed in 4900 cc. of 2.5% aqueous carboxymethyl cellulose solution and the pH of the dispersion is adjusted to 4.1 with phosphoric acid. The dispersion is employed as in Example 1.
• Example 8 60 g. of the aforementioned compound VI (see Table 2) are suspended in 6.0 cc. of highly concentrated Texapon Z (20% aqueous solution) and 150 cc. of Polyglycol P 400. The resulting suspension is dispersed in 4850 cc. of a 2% aqueous solution of sodium alginate (Algipon P III solution, Henkel & (10.), which contains 436 g. of primary potassium phosphate and 48.5 g. of secondary sodium phosphate and which has a pH value of 5.7. The dispersion is employed as in Example 1.
• Example 9 50 g. of the aforementioned compound VII (see Table 2) are mixed with 10 cc. of a 20% solution of the Teepol (see Table 4) and cc. of a 1.5% aqueous solution of propylene glycol ester of alginic acid in a mixing apparatus and are dispersed in 4890 cc. of a 1% solution of the above mentioned alginic acid ester. The dispersion is employed as in Example 1.
• Example 10 60 g. of the aforementioned compound VII (see Table 2) are mixed with 12 cc. of a 10% aqueous solution of the Texapon Z (see Table 4) and cc. of a 1.5% aqueous solution of the amide of alginic acid in a mixing apparatus. Said mixture is dispersed in a mixture of 1850 cc. of a 1% aqueous solution of propylene glycol ester of alginic acid and 3000 cc. of a 2% aqueous solution of carboxymethyl cellulose. The pH value of the dispersion is adjusted to 4.1 with 10% phosphoric acid.
• Example 11 50 g. of the aforementioned compound II (see Table 1) are mixed with 10 g. of the Polystate (see Table 4), 25 cc. Polyglycol P 300 and 50 cc. of a 1% aqueous solution of caragheenate in a mixing apparatus and dispersed in 4900 cc. of a 1% aqueous solution of caragheenate. The dispersion is employed as described in Example 1.
• Example 12 70 g. of the aforementioned compound XII (see Table 2) are suspended in 35 g. of the Tween 40 (see Table 4) and 50 cc. Polyglycol P 600 and dispersed in 4900 cc. of a 2.5% aqueous solution of carboxymethyl cellulose. The dispersion is adjusted to a pH value of 4.3 with phosphoric acid. The resulting dispersion is employed as disclosed in Example 1.
• Example 13 Example 14 50 g. of the aforementioned compound XI (see Table 2) are suspended in 25 g. of the Texapon Z (see Table 4), 25 cc. of Polyglycol P 300 and 50 cc. of a 1% aqueous solution of caragheenate. This suspension is dispersed in 4900 cc. of a 1.5% aqueous solution of the propylen glycol ester of alginic acid. The dispersion is employed as described in Example 1.
• a planographic printing form comprising an aluminium plate having superimposed thereon at least one image consisting essentially of silver particles, said image being rendered hydrophobic and receptive to greasy pn'nt ing inks by the direct application thereon of an effective amount of a 2-mercapto -1,3,4-thiodiazole having the formula wherein Z stands for a bivalent member selected from the group consisting of (1) alkylene having up to 6 carbon atoms; (II) --SAS, wherein A is a member selected from the group consisting of alkylene of 1-10 carbon atoms, phenyla'lkylene, [CH --(CH wherein m is 2-4 and n is 1-4; and (HI) NHBNH wherein B is a member selected from the group consisting of alkylene of 4-10 carbon atoms, cyclohexylene, phenylene, diphenylene, and phenylalkylene.
• a process for producing planographic printing plates consisting in developing an imagewise exposed silver halide emulsion layer while in contact with an aluminum plate in a silver halide developer solution containing a silver "halide solvent for dissolving silver halide from the unexposed areas of said silver halide emulsion layer, transferring the dissolved unexposed silver halide to said aluminum plate and reducing the dissolved silver halide on said aluminium plate to obtain a corresponding silver image, characterized in thereafter contacting said silver image directly with a hydrophobing amount of a Z-mercapto- 1,3,4-thiodiazole having the formula N HS("3 (i-z-ii -HS wherein Z stands for a bivalent member selected from the group consisting of (I) alkylene having up to 6 carbon atoms; (II) SAS-, wherein A is a member selected from the group consisting of alkylene of 1-10 carbon atoms, phenylalkylene, [(CH O(CH wherein m is

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• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Photosensitive Polymer And Photoresist Processing (AREA)
• Printing Plates And Materials Therefor (AREA)
• Inks, Pencil-Leads, Or Crayons (AREA)

Priority Applications (8)

Applications Claiming Priority (2)

Publications (1)

Family

ID=25963395

Family Applications (1)

Country Status (5)

Cited By (9)

Families Citing this family (1)

Citations (9)

• 0
  • NL NL256257D patent/NL256257A/xx unknown
• 1959
  • 1959-09-26 DE DEA32938A patent/DE1217784B/de active Pending
• 1960
  • 1960-09-26 GB GB17813/63A patent/GB942823A/en not_active Expired
  • 1960-09-26 GB GB33022/60A patent/GB942822A/en not_active Expired
  • 1960-09-26 US US58181A patent/US3223524A/en not_active Expired - Lifetime
  • 1960-09-26 CH CH1084560A patent/CH390058A/de unknown
• 1961
  • 1961-03-27 DE DEA37064A patent/DE1227341B/de active Pending

Patent Citations (10)

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