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US 4,854,969 AGranted
Lithographic fountain solutions
AssigneeSun Chemical Corporation
InventorsRobert Bassemir, Ramasamy Krishnan, Arthur I. Lowell
Life of this patent
Estimating the term…
Abstract
Lithographic fountain solutions containing water, one or more nonionic surfactants having an HLB in the range of 1 to 8 and one or more hydrotropes to maintain the surfactant in solution without increasing the HLB of the fountain solution.
Claims18
Lithographic fountain solution comprising:
- (a) water;
- (b) a nonionic surfactant having an HLB in the range of 1 to 8 selected from the group consisting of block copolymers of propylene oxide and ethylene oxide;
- block copolymers of propylene oxide, ethylene oxide and ethylenediamine;
- and C.sub.1 -C.sub.20 ethoxylated alcohols, amides, fatty acid esters, alkanol amides, glycol esters, ethoxylated alkyl phenols, ethoxylated acetylenic glycols, ethoxylated acetylenic carbinols, acetylenic glycols, acetylenic carbinols, silicone glycols, silicone alkylene oxide copolymers and mixtures thereof;
- and
- (c) a hydrotrope selected from the group consisting of sodium toluene sulfonate, sodium xylene sulfonate, sodium cumene sulfonate, sodium terpene sulfonates, ammonium toluene sulfonate, ammonium xylene sulfonate, ammonium cumene sulfonate, tetrabutyl ammonium hydrogen sulfate, tetraphenyl phosphonium bromide, tetrabutyl ammonium bromide, sodium thiocyanate and mixtures thereof, the ratio of hydrotrope to surfactant being in the range of about 1:1 to about 10:1.
3 more elements
Dependencies are inferred from the claim text.