Patents by Inventor Yoon Tae Kwak
Yoon Tae Kwak 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: 7396886Abstract: A process for making high specific viscosity copolymers of maleic anhydride and an alkyl vinyl either having as specific viscosity of at least 7, preferably 10-50, are made by copolymerizing maleic anhydride and an alkly vinyl ether monomers in the presence of added acetylene.Type: GrantFiled: June 21, 2005Date of Patent: July 8, 2008Assignee: ISP Investments Inc.Inventors: Yoon Tae Kwak, Paul D. Taylor, William J. Swatos
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Patent number: 6713538Abstract: A post-treatment process for making a water-resistant polymeric coating composition or a strongly-swellable polymeric gel includes providing a stable, aqueous two-phase polymeric composition by the steps of forming a reaction mixture in a reaction vessel which includes a water-soluble vinyl monomer, optionally with one or more water-soluble comonomers, first amount of a crosslinking agent, and water, heating the mixture, then periodically adding a predetermined amount of an initiator, and polymerizing at about 30-130° C., optionally removing the resultant two-phase composition from the reaction vessel, adding a predetermined amount of an additional crosslinker or proteinaceous compound thereto, optionally coating the mixture onto a support, and optionally heating to further polymerize the mixture.Type: GrantFiled: June 15, 2001Date of Patent: March 30, 2004Assignee: ISP Investments Inc.Inventors: David K. Hood, Stephen L. Kopolow, Michael Tallon, Yoon Tae Kwak, Laurence Senak, Drupesh Patel, John Mc Kittrick
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Patent number: 6641259Abstract: A method of color inkjet printing on a substrate coated with a substantially colorless, 90-10 to 30-70, wt/wt, copolymer of vinyl pyrrolidone and vinyl imidazole, by inkjet printing dye images on the thus-coated substrate, characterized in that the dye images obtained exhibit excellent light fastness.Type: GrantFiled: June 5, 2002Date of Patent: November 4, 2003Assignee: ISP Investments Inc.Inventors: Stephen L. Kopolow, Drupesh Patel, Yoon Tae Kwak, Michael Tallon, David K. Hood, Laurence Senak, John M C Kittrick
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Patent number: 6624271Abstract: A process for making a solution of a copolymer of maleic anhydride (MA) and methyl vinyl ether (MVE) monomers the specific viscosity (SV) of the product being about 2.5-6, preferably 3-5, indicating a weight average molecular weight of substantially above one million, preferably above 1.5 million and a solids content of about 20-45%, preferably 30-40, in isopropyl acetate (IPAc), solvent includes the steps of (a) precharging part of MVE in IPAc into a reactor heated to about 50-90° C., and then (b) feeding (i) a solution of MA in IPAc, (ii) the rest of MVE, at a mole ratio of MA:MVE of 1:≧1.5 to 1:<3, preferably 1:2.4, and (iii) a free radical initiator dissolved in IPAc, in an amount of 0.02-0.3%, preferably 0.05-0.2%, based on total monomers, into the reactor over time. Powders of such MA/MVE copolymers are made by removing the solvent from the solution.Type: GrantFiled: November 26, 2002Date of Patent: September 23, 2003Assignee: ISP Investments Inc.Inventors: Yoon Tae Kwak, Stephen L. Kopolow, Alan J. Carlin
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Patent number: 6620521Abstract: What is described herein is a process for preparing a lightly-crosslinked copolymer of (a) vinyl pyrrolidone (VP) and (b) dimethylaminopropyl methacrylamide (DMAPMA) under more reproducible conditions. Suitably the weight ratio of (a):(b) is 50-95:50-5, preferably 80:20. The copolymer has a Brookfield viscosity of 5,000 to 45,000 cps; preferably 10,000 to 30,000 cps, and a haze of <100 NTU; it includes about 0.1 to 0.5 wt. %, preferably 0.2 to 0.4 wt. %, of a cross-linking agent based upon the total weight of the monomers in the copolymer.Type: GrantFiled: September 15, 2000Date of Patent: September 16, 2003Assignee: ISP Investments Inc.Inventors: Yoon Tae Kwak, Stephen L. Kopolow
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Patent number: 6548597Abstract: A stable, aqueous polymeric composition which forms a clear to translucent film upon application to a substrate includes, by weight, 5-75% of (a) a water-soluble polymer having (b) in situ-formed, substantially water-insoluble resinous particles of said polymer substantially uniformly dispersed therein, and (c) 25-95% of water.Type: GrantFiled: February 15, 2001Date of Patent: April 15, 2003Assignee: ISP Investments Inc.Inventors: David K. Hood, Stephen L. Kopolow, Michael Tallon, Yoon Tae Kwak, Laurence Senak, Drupesh Patel, John Mc Kittrick
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Patent number: 6541565Abstract: A system for delivering an active material includes (1) a stable, aqueous polymeric composition of (a) a water-soluble polymer having (b) in situ-formed, substantially water-insoluble resinous particles of said polymer substantially uniformly dispersed therein, and (c) water; and (2) an active material dispersed in said composition.Type: GrantFiled: June 15, 2001Date of Patent: April 1, 2003Assignee: ISP Investments Inc.Inventors: David K. Hood, Stephen L. Kopolow, Michael Tallon, Yoon Tae Kwak, Laurence Senak, Drupesh Patel, John Mc Kittrick
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Patent number: 6458888Abstract: A rheology modifier for use in aqueous or alcoholic compositions includes an aqueous two-phase polymeric composition of by weight, 5-75% of (a) a water-soluble polymer having (b) in situ-formed, substantially water-insoluble resinous particles of said polymer substantially uniformly dispersed therein, and (c) 25-95% of water.Type: GrantFiled: June 15, 2001Date of Patent: October 1, 2002Assignee: ISP Investments Inc.Inventors: David K. Hood, Stephen L. Kopolow, Michael Tallon, Yoon Tae Kwak, Laurence Senak, Drupesh Patel, John Mc Kittrick
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Publication number: 20020061960Abstract: A post-treatment product and process for making a water-resistant polymeric coating or a strongly-swellable polymeric gel includes providing a stable, aqueous two-phase polymeric composition by the steps of forming a reaction mixture in a reaction vessel which includes a water-soluble vinyl monomer, optionally with one or more water-soluble comonomers, a first amount of a crosslinking agent, and water, heating the mixture, then periodically adding a predetermined amount of an initiator, and polymerizing at about 30-130° C., optionally removing the resultant two-phase composition from the reaction vessel, adding a predetermined amount of additional crosslinker or proteinaceous compound thereto, optionally coating the mixture onto a support, and optionally heating to further polymerize or process the mixture.Type: ApplicationFiled: June 15, 2001Publication date: May 23, 2002Applicant: ISP INVESTMENTS INC.Inventors: David K. Hood, Stephen L. Kopolow, Michael Tallon, Yoon Tae Kwak, Laurence Senak, Drupesh Patel, John Mc Kittrick
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Publication number: 20020058750Abstract: A stable, aqueous polymeric composition which forms a clear to translucent film upon application to a substrate includes, by weight, 5-75% of (a) a water-soluble polymer having (b) in situ-formed, substantially water-insoluble resinous particles of said polymer substantially uniformly dispersed therein, and (c) 25-95% of water.Type: ApplicationFiled: February 15, 2001Publication date: May 16, 2002Applicant: ISP INVESTMENTS INC.Inventors: David K. Hood, Stephen L. Kopolow, Michael Tallon, Yoon Tae Kwak, Laurence Senak, Drupesh Patel, John Mc Kittrick
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Publication number: 20020058015Abstract: A system for delivering an active material includes (1) a stable, aqueous polymeric composition of, by weight, (a) a water-soluble polymer having (b) in situ-formed, substantially water-insoluble resinous particles of said polymer substantially water-insoluble resinous particles of said polymer substantially uniformly dispersed therein, and (c) 25-95% of water; and (2) an active material dispersed in said composition.Type: ApplicationFiled: June 15, 2001Publication date: May 16, 2002Applicant: ISP INVESTMENTS INC.Inventors: David K. Hood, Stephen L. Kopolow, Michael Tallon, Yoon Tae Kwak, Laurence Senak, Drupesh Patel, John Mc Kittrick
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Publication number: 20020055585Abstract: A rheology modifier for use in aqueous or alcoholic compositions includes an aqueous two-phase polymeric composition of by weight, 5-75 % of (a) a water-soluble polymer having (b) in situ-formed, substantially water-insoluble resinous particles of said polymer substantially uniformly dispersed therein, and (c) 25-95 % of water.Type: ApplicationFiled: June 15, 2001Publication date: May 9, 2002Applicant: ISP INVESTMENTS INC.Inventors: David K. Hood, Stephen L. Kopolow, Michael Tallon, Yoon Tae Kwak, Laurence Senak, Drupesh Patel, John Mc Kittrick
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Patent number: 5874510Abstract: A process for making crosslinked polymers of maleic anhydride and methyl vinyl ether is described. The process is characterized by precharging methyl vinyl ether, partially or totally, in isopropyl acetate, and a crosslinker, and then continuously feeding molten maleic anhydride and methyl vinyl ether into the thus-precharged reactor. The monomer mixture then is polymerized at a temperature of about 60.degree.-80.degree. C. The reaction product is a pumpable, homogeneous suspension of the crosslinked copolymer at a solids level of about 30-50%, which is recoverable in high yield upon removal of the solvent and filtering the suspension.Type: GrantFiled: September 18, 1997Date of Patent: February 23, 1999Assignee: ISP Investments Inc.Inventors: Yoon Tae Kwak, Stephen L. Kopolow
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Patent number: 5763554Abstract: This invention relates to an improved denture adhesive composition having extended holding power accompanied by adhesion building properties during use and having increased gel adhesion, which composition consists essentially of (a) from about 10 to about 35 wt. % lower alkyl vinyl ether-maleic acid copolymer wherein from 0 to about 90 wt. % of the copolymer carboxyl units are converted to a mixture of salts selected from the group of calcium, sodium, strontium, aluminum, zinc, magnesium and potassium; (b) 10-35 wt. % of a crosslinked terpolymer of alkyl vinyl ether, maleic anhydride and a C.sub.16 -C.sub.20 alkyl acrylate or methacrylate, or vinyl ether; crosslinked with a C.sub.6 -C.sub.14 diene, e.g. 9-decadiene, and their salts; (c) 10-35 wt. % of a cohesive agent; in a weight ratio of between about 2:1 and about 1:2 with respect to the copolymer; and (d) from about 30 to about 70 wt. % of an oil base as a carrier.Type: GrantFiled: October 11, 1996Date of Patent: June 9, 1998Assignee: ISP Investments Inc.Inventors: William E. Prosise, Yoon Tae Kwak