Pratt Institute Jan 1980 - 1985
Professor
Sun Chemical Jan 1980 - 1985
Chief Scientist
Education:
State University of New York College at Buffalo 1975 - 1980
Doctorates, Doctor of Philosophy, Chemical Engineering
University at Buffalo 1975 - 1979
Doctorates, Doctor of Philosophy
Indian Institute of Technology, Kharagpur 1970 - 1975
Bachelors, Bachelor of Technology, Chemical Engineering
Skills:
Chemistry Polymers R&D Coatings Materials Science Polymer Chemistry Additives Chemical Engineering Product Development Plastics Analytical Chemistry Polymer Science Manufacturing Materials Organic Chemistry Spectroscopy Research and Development
Ramasamy Krishnan - Colonia NJ Martin Thomas Czebotar - Somerset NJ Hugo Babij - Waldwick NJ
Assignee:
Sun Chemical Corporation - Fort Lee NJ
International Classification:
C09D 1102
US Classification:
106 3173, 106 3169, 106 3175, 106 3186, 106 3178
Abstract:
A water based offset lithographic ink comprising water; a modified rosin polymer comprised of resins soluble in water regardless of the pH of the water, resin rosin salts soluble in water at pH ranging from 7. 5 to 10 and aqueous emulsion resins; a modified linseed oil; and pigment.
Ramasamy Krishnan - Colonia NJ Marilyn Yamat - Bergenfield NJ Hugo Babij - Waldwick NJ
Assignee:
Sun Chemical Corporation - Fort Lee NJ
International Classification:
C09D 1106
US Classification:
106 3166, 106 3173, 106 3175, 106 3186
Abstract:
A waterbased heatset offset lithographic ink comprising water, polyamide resins or fumarated rosin resins, hydroxyethylethylene urea, a modified linseed oil, a dibutylated benzoguanamine, a pigment and p-toluene sulfonic acid.
Publication Gravure Printing Inks Based On Silicone Modified Water-Based Emulsions
Ramasamy Krishnan - Colonia NJ Robert Catena - Belleville NJ Selcuk Avci - Clifton NJ
Assignee:
Sun Chemical Corporation - Fort Lee NJ
International Classification:
C09D 1110
US Classification:
523160, 524558, 524556, 524265
Abstract:
The present invention relates an improved silicone modified water-based emulsion used primarily for publication gravure ink. Publication gravure water-based ink produced with the new polymer exhibits superior paper holdout, smoother lay, and higher gloss on super calendered and uncoated paper substrates as compared to conventional water-based gravure inks.
Ramasamy Krishnan - North Brunswick NJ, US Kenneth Smith - Saylorsburg PA, US Neil Young - Oakland NJ, US Inessa Gurevich - Fair Lawn NJ, US
Assignee:
Sun Chemical Corporation - Parsippany NJ
International Classification:
C09D 11/10 C09D 11/14
US Classification:
106 3126, 106 3125, 524 47
Abstract:
A printing ink is disclosed containing: non-water soluble polymeric surfactant; and water as a dispersed phase, wherein the non-water soluble polymeric surfactant stabilizes the water to form a stabilized emulsion heatset printing ink.
Ramasamy Krishnan - North Brunswick NJ, US Kenneth Smith - Saylorsburg PA, US Neil Young - Oakland NJ, US Inessa Gurevich - Fair Lawn NJ, US
Assignee:
Sun Chemical Corporation - Parsippany NJ
International Classification:
C09F 1/04 C07C 231/02
US Classification:
527600, 564123, 564133, 564144, 554219, 528332
Abstract:
A non-water soluble polymeric surfactant is prepared by reacting a polymerized/bodied unsaturated oil with maleic anhydride followed by a further partial or complete reaction with an amine to form an amide; or an alcohol to form an ester.
A water-based lithographic ink composition is described, and contains water, a resin-bonded pigment; a nonionic surfactant, a rewetting agent, and a polymerizable surfactant. The nonionic surfactant is present in an amount such that the dynamic surface tension of the total composition is about 20 to about 40 dynes/cm. The polymerizable surfactant is present in an amount of about 0.5% by weight to about 2% by weight of the composition. The ink composition may also contain other, conventional ink component, as desired.
Ryszard Sprycha - Wallington NJ, US Mathew Mathew - Bloomfield NJ, US Ramasamy Krishnan - Colonia NJ, US
International Classification:
C03C017/00 C09D005/00
US Classification:
523/160000, 523/161000
Abstract:
A non-aqueous ink formulation or dispersion is disclosed containing a resin, a pigment, an organic solvent and a water-soluble base aminoalcohol, acid or aminoacid. Also disclosed is a method of increasing the stability and resolubility of non-aqueous inks formulations or dispersions by adding to the formulation or dispersion a small amount of water-soluble base aminoalcohol, acid or aminoacid.
Fast Setting Sheet Fed Offset Inks With Non-Aqueous Dispersion Polymers
Ramasamy Krishnan - North Brunswick NJ, US Mark Schneider - Dumont NJ, US Jerome Bollard - Frankfurt am Main, DE
International Classification:
C09D 11/10 C08K 5/01 C08L 33/14
US Classification:
524517
Abstract:
A non aqueous dispersion is disclosed containing: a shell polymer; a core polymer, and a continuous phase solvent, wherein said shell polymer is soluble and said core polymer is insoluble in the continuous solvent. Also disclosed is a method for improving the setting properties of a sheet fed offset ink by adding to the ink the above non aqueous dispersion.