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公开(公告)号：CA2047464A1
公开(公告)日：1992-01-22
申请号：CA2047464
申请日：1991-07-19
Applicant: HOECHST AG
Inventor： PLIEFKE ENGELBERT , FAUST RAIMUND J
Abstract: A support material for photosensitive substances, useful in the production of offsetprinting plates, is disclosed. The support material comprises mechanically, chemically or electrochemically roughened aluminum or an aluminum alloy in the form of a sheet, a foil or a web, and which is coated on at least one side with a hydrophilic polymer which comprises (a) at least 2 mol% of units having acidic side groups and (b) at least 2 mol% of units having basic side groups which are capable of being protonated.
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公开(公告)号：BR8802559A
公开(公告)日：1988-12-20
申请号：BR8802559
申请日：1988-05-25
Applicant: HOECHST AG
Inventor： PLIEFKE ENGELBERT
Abstract: A process is disclosed for the electrochemical roughening of aluminum for use in printing plate supports, which is carried out by means of an electrolyte containing sulfate ions and aluminum chloride; preference is given to sulfuric acid and aluminum chloride. Printing plate supports roughened by the process according to the present invention show a particularly uniform, pit-free and overall roughening structure.
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公开(公告)号：CA1225065A
公开(公告)日：1987-08-04
申请号：CA427270
申请日：1983-05-03
Applicant: HOECHST AG
Inventor： PLIEFKE ENGELBERT
Abstract: Disclosed is a process for electrochemically roughening aluminum or alloys thereof, in an aqueous electrolyte, under the action of an alternating current having a frequency in the range from 0.3 to 15 Hz. The materials roughened in this way are used as supports for radiation-sensitive reproduction coatings in the field of manufacturing offset-printing plates. Also disclosed are roughened aluminum supports and printing plates produced by the above process.
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公开(公告)号：BR8600495A
公开(公告)日：1986-10-21
申请号：BR8600495
申请日：1986-02-05
Applicant: HOECHST AG
Inventor： PLIEFKE ENGELBERT
Abstract: Disclosed is a process for the electrochemical roughening of aluminum or aluminum alloys useful for printing plate supports, in which an electrolyte containing chloride ions and ammonium ions, preferably hydrochloric acid and ammonium chloride, respectively, is employed. Also disclosed is a printing plate support roughened by the above process which possesses a particularly uniform graining structure.
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公开(公告)号：AU553196B2
公开(公告)日：1986-07-03
申请号：AU1814783
申请日：1983-08-19
Applicant: HOECHST AG
Inventor： PLIEFKE ENGELBERT , USBECK GERHARD
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Patent Agency Ranking
公开(公告)号：AU1429983A
公开(公告)日：1983-11-17
申请号：AU1429983
申请日：1983-05-06
Applicant: HOECHST AG
Inventor： PLIEFKE ENGELBERT
Abstract: Disclosed is a process for electrochemically roughening aluminum or alloys thereof, in an aqueous electrolyte, under the action of an alternating current having a frequency in the range from 0.3 to 15 Hz. The materials roughened in this way are used as supports for radiation-sensitive reproduction coatings in the field of manufacturing offset-printing plates. Also disclosed are roughened aluminum supports and printing plates produced by the above process.
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公开(公告)号：ZA825879B
公开(公告)日：1983-06-29
申请号：ZA825879
申请日：1982-08-13
Applicant: HOECHST AG
Inventor： PLIEFKE ENGELBERT
Abstract: In the development of exposed light-sensitive reproduction layers using an aqueous electrolyte developer the parts of the layer corresponding to the non-image areas are removed by electrochemical treatment. An electrolyte is used which has a pH in the range from 2.0 to 10.0 and contains at least one salt in a concentration of 0.1 weight percent up to the saturation limit of the solution for the particular salt. The electrolyte may also contain 0.1 to 5 weight percent surfactant.
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公开(公告)号：FI822965L
公开(公告)日：1983-03-01
申请号：FI822965
申请日：1982-08-26
Applicant: HOECHST AG
Inventor： PLIEFKE ENGELBERT
Abstract: In the development of exposed light-sensitive reproduction layers using an aqueous electrolyte developer the parts of the layer corresponding to the non-image areas are removed by electrochemical treatment. An electrolyte is used which has a pH in the range from 2.0 to 10.0 and contains at least one salt in a concentration of 0.1 weight percent up to the saturation limit of the solution for the particular salt. The electrolyte may also contain 0.1 to 5 weight percent surfactant.
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公开(公告)号：BR9103109A
公开(公告)日：1992-02-11
申请号：BR9103109
申请日：1991-07-19
Applicant: HOECHST AG
Inventor： FAUST RAIMUND JOSEF , LUTZ SILVIA , PLIEFKE ENGELBERT
IPC: C08F220/12 , B41N1/08 , B41N3/03 , C08F20/34 , C08F30/02 , C08F220/10 , C08F220/34 , C08F230/02 , G03F7/033
Abstract: The invention relates to a hydrophilic copolymer having the general structure: in which R1 denotes H, CH3 or C2H5, R2 denotes an alkyl or cycloalkyl radical having 1 to 17 carbon atoms, R3 denotes CH3, C2H5 or C3H7, m is 2, 3 or 4 and n, o, p denote the fractions of the monomer units having acidic side groups, neutral, non-ionizable monomer units and monomer units having basic side groups respectively, in mol %, with n+o+p=100 mol %, with the proviso that n and p are each >/=2 mol %, wherein the copolymer is a linear copolymer having a random structure of monomer units. The copolymer is useful as a hydrophilizing agent for lithographic and offset printing plates.
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公开(公告)号：CA2047465A1
公开(公告)日：1992-01-22
申请号：CA2047465
申请日：1991-07-19
Applicant: HOECHST AG
Inventor： FAUST RAIMUND J , LUTZ SILVIA , PLIEFKE ENGELBERT
IPC: C08F220/04 , B41N1/08 , B41N3/03 , C08F20/34 , C08F20/52 , C08F220/06 , C08F220/34 , C08F220/56 , C08F220/58 , C08F222/02 , C08F220/10 , B41N1/12 , C08F220/54
Abstract: The invention relates to a thermally crosslinkable hydrophilic copolymer have the general structure: ...-(A)m-...-(B)n-...-(C)o-...-(D)p-... in which A is at least one polymerizable monomer having an acidic side group, B is at least one polymerizable monomer having a basic side group, C is at least one polymerizable monomer having a non-polar, nonhydrophilic side group, and D is N-butoxymethylmethacrylamide, m, n, o and p are the monomer contents of monomers A, 8, C and D, respectively, in mol%, with m + n + o + p = 100 mol% , with the proviso that the sum of m + n = about 5 to 90 mol%, m and n are each ? 2 mol% and p is ? 1 mol%, wherein the copolymer is a linear copolymer having a random structure of the monomers. The copolymer is useful as a hydrophilizing agent for lithographic and offset printing plates.
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