会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 8. 发明授权
    • Concentrated dampening water composition for lithographic printing
    • 用于平版印刷的浓缩防水组合物
    • US5221330A
    • 1993-06-22
    • US889391
    • 1992-05-28
    • Hiroshi MatsumotoKenji Kunichika
    • Hiroshi MatsumotoKenji Kunichika
    • B41N3/08
    • B41N3/08
    • A concentrated dampening water composition for lithographic printing comprises a) 0.1 to 10% by weight of a hydrophilic polymeric compound having a film-forming ability; b) 0.01 to 15%, by weight of a pH buffering agent; c) 5 to 80% by weight of a water-miscible organic solvent having a boiling point of not less than 140.degree. C. and whose 1% by weight aqueous solution has a surface tension of not more than 60 dynes/cm; d), 0.05 to 10% by weight of a compound, for instance, represented by the following general formula (III); and e) 30 to 80% by weight of water:R.sup.8 --Z.sup.1 (R.sup.9)(R.sup.10)--R.sup.7.X.sup.1 (III)wherein R.sup.7 to R.sup.10 each represents a C.sub.1-12 alkyl, cyclic alkyl, hydroxyalkyl, benzyl or substituted or unsubstituted phenyl group; Z.sup.1 represents N, P or B; X.sup.1 represents an anion or cation selected from the group consisting of halogen, nitrate, sulfate, phosphate, hydroxyl, PF.sub.6.sup.-, BF.sub.4.sup.-, Li.sup.+, Na.sup.+, K.sup.+ and NH.sub.4.sup.+. The composition shows good printing properties and does not impair image areas of printing plates although it comprises a high boiling point solvent. Further, it provides dampening water having excellent stability with time, satisfies the requirements stipulated in the Japanese Fire Services Act as well as Industrial Safety and Health Law and thus can steadily provide good copies.