Dampening water composition for lithographic plate
Patent 5064749 Issued on November 12, 1991. Estimated Expiration Date: 
July 30, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
July 30, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesSubstitutive additives for isopropyl alcohol in fountain solution for lithographic offset printing Fountain solutions suitable for use in lithographic offset printing Printing fountain solution Damping solution for offset printing Patent #: 4970138 InventorsApplicationNo. 559352 filed on 07/30/1990US Classes:430/331, Finishing or perfecting composition or product106/2, Coating repellent430/309, Post imaging process430/325Post image treatment to produce elevated patternExaminersPrimary: Le, Hoa VanAttorney, Agent or FirmForeign Patent References
International ClassG03C 005/00Foreign Application Priority Data1989-08-02 JPAbstractThe present invention relates to a concentrated dampening water for a lithographic printing plate characterized by comprising:(a) 0.5 to 50% by weight of, as a nonionic surfactant, at least one compound selected from the group consisting of ethylene oxide and/or propylene oxide adduct of 2-ethyl-1,3-hexanediol and ethylene oxide and/or propylene oxide adduct of acetylene alcohol or acetylene glycol,(b) 1 to 30% by weight of 4-hydroxy-4-methyl-2-pentanone and/or a compound of the following formula [I], [III] or [III]: ##STR1## wherein R represents a methyl group, an ethyl group, a propyl group or a butyl group, and(c) 30 to 75% by weight of water.According to the present invention, an excellent concentrated dampening water is obtained, which has substantially no toxicity: does not pollute the working environment and causes no fire; necessitates no local exhaust device; and is excellent from the viewpoints of fouling of the metering roll, bleeding, emulsifiability, stability for continuous operation and anti-foaming property. Thus, with the concentrated dampening water of the present invention, the stable printing is possible. |
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