Patents by Inventor Ramasamy Krishnan
Ramasamy Krishnan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11912821Abstract: The present invention provides alkoxylated polymers. The alkoxylated polymers have two or more alkoxylated sites. The alkoxylated polymers can comprise any monomers and/or oligomers that contain one or more functional groups with an active hydrogen. The alkoxylated polymers are useful in any application for which polymers are generally used. For example, the alkoxylated polymers are useful as additives in ink and coating compositions.Type: GrantFiled: January 17, 2019Date of Patent: February 27, 2024Assignee: Sun Chemical CorporationInventors: Ramasamy Krishnan, Ralph Arcurio, Russell Schwartz
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Patent number: 11767395Abstract: Described herein is a polar non-aqueous dispersion comprising polar polymeric microparticles in a polar non-aqueous medium, the polar polymeric microparticles being insoluble in the medium and being produced by dispersion polymerization of vinyl monomers such as acrylate monomers in the medium in the presence of a polymeric acrylic stabilizer. Inks, coatings and overprint varnishes are formulated that employ the polar non-aqueous dispersion. Such inks, etc., exhibit superior chemical resistance properties, for example in one-part and two-part systems.Type: GrantFiled: March 13, 2017Date of Patent: September 26, 2023Assignee: Sun Chemical CorporationInventors: Juanita M. Parris, Soichiro Omizu, Carl S. Weisbecker, Josie M. Rosen, Ralph Arcurio, Ramasamy Krishnan, Alex Chudolij
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Patent number: 11643562Abstract: The present invention provides water-based energy curable compositions that exhibit improved printability, adhesion, opacity, and wash-up properties. The compositions comprise one or more inert water-based polyurethane resins and one or more water-based phosphate esters. Addition of the inert polyurethane resins and phosphate esters improves adhesion of the energy curable compositions to a variety of substrates.Type: GrantFiled: July 9, 2021Date of Patent: May 9, 2023Assignee: Sun Chemical CorporationInventors: Ramasamy Krishnan, Mark Schneider, David Klein
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Patent number: 11591482Abstract: Described herein are water-based inks that comprise water, a water miscible solvent having a boiling point of about 56° C. to about 98° C., and a latex. In one aspect, the water miscible solvent comprises about 10 wt % to about 30 wt % of the ink (based on the total weight of the ink). In another aspect, the latex is an alcohol-tolerant latex that exhibits limited or no particle size increase in the presence of alcohol. Further described herein are articles printed with the inks, and methods of printing with the inks.Type: GrantFiled: July 18, 2018Date of Patent: February 28, 2023Assignee: Sun Chemical CorporationInventors: Ramasamy Krishnan, Russell Schwartz, Juanita Parris
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Publication number: 20220275224Abstract: The present invention provides water-based energy curable compositions that exhibit improved printability, adhesion, opacity, and wash-up properties. The compositions comprise one or more inert water-based polyurethane resins and one or more water-based phosphate esters. Addition of the inert polyurethane resins and phosphate esters improves adhesion of the energy curable compositions to a variety of substrates.Type: ApplicationFiled: July 9, 2021Publication date: September 1, 2022Applicant: SUN CHEMICAL CORPORATIONInventors: Ramasamy Krishnan, Mark Schneider, David Klein
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Patent number: 10875338Abstract: Provided are web-offset lithographic ink compositions that contain an alkyl thioether surfactant, an alkoxylated modified rosin, or a combination thereof. The ink compositions can be oil-based inks or water-based inks that can be radiation-curable. The resulting ink compositions can be used in web-offset lithographic printing to substantially reduce or eliminate the ink feedback and ink build-up that occurs during printing. Also provided are methods for reducing or eliminating ink feedback and build-up during lithographic printing processes.Type: GrantFiled: September 20, 2012Date of Patent: December 29, 2020Assignee: SUN CHEMICAL CORPORATIONInventors: Ramasamy Krishnan, Jeff Jones, Matthias Helliblau
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Patent number: 10851202Abstract: The present invention concerns polyester resins of General Formula I (HO—[R1R2C(CH2—)]a[—OCOCxHyCO2—]b[—CpHzO—]c—H) or General Formula II (HO—[R1R2C(CH2—)2]a[—OCOCxHyCO2—]b[—CH2CR3(CO2H)CH2O]d—H), wherein R1, R2, a, b, c, d, x, y, p, and z are as defined herein, for use in inks and coating compositions. The polyester resins of the present invention are particularly, but not exclusively, suitable to enhance the adhesion between a printing ink or coating composition and a substrate, especially a plastic substrate, to which it is applied. The polyester adhesion promoters of the invention are compatible with urethane-based inks and coating compositions.Type: GrantFiled: January 21, 2015Date of Patent: December 1, 2020Assignee: Sun Chemical CorporationInventors: Ralph Arcurio, Alex Chudolij, Ramasamy Krishnan, Mark Schneider, Paul Hunt, Paul Smales
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Patent number: 10845924Abstract: Described herein are capacitive devices and methods for producing same using printing methods such as flexography, gravure, offset, lithography, etc. The capacitive devices are formed from printing conductive inks, non-conductive inks, masking ink layers, graphic artwork layers, and overprint layers on a substrate. Interaction between a conductive ink layer of the capacitive device with a touch screen device of a computer, tablet, smart phone, etc. causes a capacitive effect that allows information coded in capacitive device to be read, leading to an activity such as the download of content to the device having the touch screen.Type: GrantFiled: October 18, 2016Date of Patent: November 24, 2020Assignee: SUN CHEMICAL CORPORATIONInventors: Mathew Mathew, Ramasamy Krishnan
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Publication number: 20200216689Abstract: Described herein are water-based inks that comprise water, a water miscible solvent having a boiling point of about 56° C. to about 98° C., and a latex. In one aspect, the water miscible solvent comprises about 10 wt % to about 30 wt % of the ink (based on the total weight of the ink). In another aspect, the latex is an alcohol-tolerant latex that exhibits limited or no particle size increase in the presence of alcohol. Further described herein are articles printed with the inks, and methods of printing with the inks.Type: ApplicationFiled: July 18, 2018Publication date: July 9, 2020Applicant: SUN CHEMICAL CORPORATIONInventors: Ramasamy Krishnan, Russell Schwartz, Juanita Parris
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Patent number: 10654303Abstract: Provided are web-offset lithographic ink compositions that contain an alkyl thioether surfactant, an alkoxylated modified rosin, or a combination thereof. The ink compositions can be oil-based inks or water-based inks that can be radiation-curable. The resulting ink compositions can be used in web-offset lithographic printing to substantially reduce or eliminate the ink feedback and ink build-up that occurs during printing. Also provided are methods for reducing or eliminating ink feedback and build-up during lithographic printing processes.Type: GrantFiled: September 20, 2012Date of Patent: May 19, 2020Assignee: SUN CHEMICAL CORPORATIONInventors: Ramasamy Krishnan, Jeff Jones, Matthias Helliblau
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Publication number: 20190284335Abstract: The present invention concerns polyester resins of General Formula I (HO—[R1R2C(CH2—)]a[—OCOCxHyCO2—]b[—CpHzO—]c—H) or General Formula II (HO—[R1R2C(CH2—)2]a[—OCOCxHyCO2—]b[—CH2CR3(CO2H)CH2O]d—H), wherein R1, R2, a, b, c, d, x, y, p, and z are as defined herein, for use in inks and coating compositions. The polyester resins of the present invention are particularly, but not exclusively, suitable to enhance the adhesion between a printing ink or coating composition and a substrate, especially a plastic substrate, to which it is applied. The polyester adhesion promoters of the invention are compatible with urethane-based inks and coating compositions.Type: ApplicationFiled: May 31, 2019Publication date: September 19, 2019Applicant: SUN CHEMICAL CORPORATIONInventors: Ralph ARCURIO, Alex CHUDOLIJ, Ramasamy KRISHNAN, Mark SCHNEIDER, Paul HUNT, Paul SMALES
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Publication number: 20190144604Abstract: The present invention provides alkoxylated polymers. The alkoxylated polymers have two or more alkoxylated sites. The alkoxylated polymers can comprise any monomers and/or oligomers that contain one or more functional groups with an active hydrogen. The alkoxylated polymers are useful in any application for which polymers are generally used. For example, the alkoxylated polymers are useful as additives in ink and coating compositions.Type: ApplicationFiled: January 17, 2019Publication date: May 16, 2019Applicant: SUN CHEMICAL CORPORATIONInventors: Ramasamy Krishnan, Ralph Arcurio, Russell Schwartz
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Patent number: 10266709Abstract: The present invention is directed to energy curable offset conductive inks and hybrid offset conductive ink compositions that contain an oxidative curable ink and the energy curable offset conductive ink. The conductive inks and ink compositions exhibit low levels of resistance and hence have superior conductivity.Type: GrantFiled: May 19, 2015Date of Patent: April 23, 2019Assignee: SUN CHEMICAL CORPORATIONInventors: Ramasamy Krishnan, Mark Schneider, Dan Rubik, Kacy Schultz, Juanita Parris
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Publication number: 20190112404Abstract: Described herein is a polar non-aqueous dispersion comprising polar polymeric microparticles in a polar non-aqueous medium, the polar polymeric microparticles being insoluble in the medium and being produced by dispersion polymerization of vinyl monomers such as acrylate monomers in the medium in the presence of a polymeric acrylic stabilizer. Inks, coatings and overprint varnishes are formulated that employ the polar non-aqueous dispersion. Such inks, etc., exhibit superior chemical resistance properties, for example in one-part and two-part systems.Type: ApplicationFiled: March 13, 2017Publication date: April 18, 2019Applicant: SUN CHEMICAL CORPORATIONInventors: Juanita M. Parris, Soichiro Omizu, Carl S. Weisbecker, Josie M. Rosen, Ralph Arcurio, Ramasamy KRISHNAN
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Publication number: 20180314359Abstract: Described herein are capacitive devices and methods for producing same using printing methods such as flexography, gravure, offset, lithography, etc. The capacitive devices are formed from printing conductive inks, non-conductive inks, masking ink layers, graphic artwork layers, and overprint layers on a substrate. Interaction between a conductive ink layer of the capacitive device with a touch screen device of a computer, tablet, smart phone, etc. causes a capacitive effect that allows information coded in capacitive device to be read, leading to an activity such as the download of content to the device having the touch screen.Type: ApplicationFiled: October 18, 2016Publication date: November 1, 2018Applicant: SUN CHEMICAL CORPORATIONInventors: Mathew MATHEW, Ramasamy KRISHNAN
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Patent number: 9988550Abstract: Provided are overprint varnish (OPV) compositions containing high viscosity essentially non-aqueous dispersions that include acrylic core/shell polymer particles in a non-aqueous solvent such as mineral oil. Also provided are methods of coating a substrate with an OPV containing the non-aqueous dispersions to improve the properties of the OPV when used to coat a substrate, such as improved rub resistance, resistance to yellowing, and desirable gloss values.Type: GrantFiled: December 6, 2012Date of Patent: June 5, 2018Assignee: SUN CHEMICAL CORPORATIONInventors: Jerome Bollard, Richard Durand, Ramasamy Krishnan, Hiroyuki Sugiyama
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Publication number: 20170101505Abstract: The present invention provides alkoxylated polymers. The alkoxylated polymers have two or more alkoxylated sites. The alkoxylated polymers can comprise any monomers and/or oligomers that contain one or more functional groups with an active hydrogen. The alkoxylated polymers are useful in any application for which polymers are generally used. For example, the alkoxylated polymers are useful as additives in ink and coating compositions.Type: ApplicationFiled: May 21, 2015Publication date: April 13, 2017Applicant: SUN CHEMICAL CORPORATIONInventors: Ramasamy Krishnan, Ralph Arcurio, Russell Schwartz
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Publication number: 20170088725Abstract: The present invention is directed to energy curable offset conductive inks and hybrid offset conductive ink compositions that contain an oxidative curable ink and the energy curable offset conductive ink. The conductive inks and ink compositions exhibit low levels of resistance and hence have superior conductivity.Type: ApplicationFiled: May 19, 2015Publication date: March 30, 2017Applicant: SUN CHEMICAL CORPORATIONInventors: Ramasamy Krishnan, Mark Schneider, Dan Rubik, Kacy Schultz, Juanita Parris
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Publication number: 20160333142Abstract: The present invention concerns polyester resins of General Formula I (HO—[R1R2C(CH2—)]a[—OCOCxHyCO2—]b[—CpHzO—]c—H) or General Formula II (HO—[R1R2C(CH2—)2]a[—OCOCxHyCO2—]b[—CH2CR3(CO2H)CH2O]d—H), wherein R1, R2, a, b, c, d, x, y, p, and z are as defined herein, for use in inks and coating compositions. The polyester resins of the present invention are particularly, but not exclusively, suitable to enhance the adhesion between a printing ink or coating composition and a substrate, especially a plastic substrate, to which it is applied. The polyester adhesion promoters of the invention are compatible with urethane-based inks and coating compositions.Type: ApplicationFiled: January 21, 2015Publication date: November 17, 2016Applicant: SUN CHEMICAL CORPORATIONInventors: Ralph ARCURIO, Alex CHUDOLIJ, Ramasamy KRISHNAN, Mark SCHNEIDER, Paul HUNT, Paul SMALES
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Patent number: 9441120Abstract: Lithographic printing inks are described, which are characterized by the inclusion of both water, in a substantially emulsified form, and inorganic filler. Inks of the present invention show improved printing properties in offset lithography, including improved transfer, reduced piling and improved mileage. They also offer cost advantages over currently available inks and the ability to minimize or eliminate entirely mineral oil from their compositions. The inks of the present invention may be used in both web-based print processes including coldset and heatset, as well as in sheetfed printing. The inks may be dried to a durable ink film at ambient temperature, with thermal energy or with actinic or electron beam radiation, or with any combination thereof.Type: GrantFiled: June 14, 2013Date of Patent: September 13, 2016Assignee: SUN CHEMICAL CORPORATIONInventors: Reiner Jung, Jochen Gattermayer, Kai-Uwe Gaudl, Ramasamy Krishnan, Lars Keller, Cumhur Bilgic, Jeff Jones, Jeff Newton, Adelbert Dettling, Russell Schwartz