Patents by Inventor Dongchan Ahn

Dongchan Ahn 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).

  • Patent number: 8377852
    Abstract: A method of preparing a substrate with a composition comprising (i) an organoborane initiator and (ii) a radical curable component disposed thereon includes the step of depositing the composition onto the substrate wherein at least one of (i) the organoborane initiator and (ii) the radical curable component is deposited onto the substrate in the form of a gradient pattern. An article comprises the substrate and the gradient pattern formed on the substrate. The gradient pattern is formed from a developed composition comprising the reaction product of (i) the organoborane initiator and (ii) the radical curable component. By forming the gradient pattern on the substrate, combinatorial and high-throughput methods of generating and testing the developed composition are possible, which enable characterization of the developed composition for various physical and chemical properties.
    Type: Grant
    Filed: October 24, 2008
    Date of Patent: February 19, 2013
    Assignee: Dow Corning Corporation
    Inventors: Dongchan Ahn, Kevin Wier
  • Publication number: 20120315329
    Abstract: Embodiments of the present invention relate generally to siloxane surface-modified hydrogel microparticles and pastes, methods for their preparation, and uses thereof for delivery of personal care and healthcare active ingredients, as well as agricultural active ingredients.
    Type: Application
    Filed: February 17, 2011
    Publication date: December 13, 2012
    Applicant: Dow Corning Corporation
    Inventors: Dongchan Ahn, James Thompson
  • Publication number: 20120309623
    Abstract: Provided in various embodiments are surface-modified hydrogels and hydrogel microparticles, methods for their preparation, and uses thereof for delivery of personal care and healthcare active ingredients, and agricultural active ingredients. In some embodiments, such hydrogels and hydrogel microparticles comprise surface coatings that are resistant to solvent washing and can act as barriers for the migration of water and/or water-compatible alcohols and actives soluble therein.
    Type: Application
    Filed: February 17, 2011
    Publication date: December 6, 2012
    Inventors: Dongchan Ahn, James Thompson
  • Publication number: 20120237464
    Abstract: In various embodiments, provided are hydrophilically-modified silicone compositions comprising substantially spherical elastomeric microparticles, methods of making such compositions, and silicone pastes, personal care, and healthcare products comprising such silicone compositions.
    Type: Application
    Filed: October 19, 2010
    Publication date: September 20, 2012
    Applicant: DOW CORNING CORPORATION
    Inventors: Dongchan Ahn, Qi Huang, Maria M. Puscau, William Schulz, James Thompson, Kevin Wier
  • Publication number: 20120219517
    Abstract: In various embodiments, provided are substantially homogenous swollen silicone gels, powders, pastes, and compositions thereof; methods of preparing the same; and personal care and healthcare products comprising the same.
    Type: Application
    Filed: October 19, 2010
    Publication date: August 30, 2012
    Applicant: Dow Corning Corporation
    Inventors: Dongchan Ahn, William Schulz, James Thompson
  • Patent number: 8097689
    Abstract: A curable organosilicon composition includes a radical curable organosilicon compound, an organoborane-amine complex, a condensation curable organosilicon compound, a condensation cure catalyst, and a condensation-reactive cross-linking compound. The curable organosilicon composition may further include an amine-reactive compound. A method of forming the curable organosilicon composition introduces the organoborane-amine complex and the amine-reactive compound into separate reaction vessels. The curable organosilicon composition is used to form various articles.
    Type: Grant
    Filed: June 19, 2007
    Date of Patent: January 17, 2012
    Assignee: Dow Corning Corporation
    Inventors: Dongchan Ahn, Patricia A. Olney
  • Patent number: 8084135
    Abstract: A composition and composite article have improved adherence with an addition-curable material. The composition and therefore the composite article, which includes at least one substrate formed from the composition, include a resin and an additive that is incorporated into the resin. The resin is organic and polymeric and free of ethylenically unsaturated and silicon hydride functional groups. The additive is selected from the group of a fluorine-substituted organopolysiloxane, an amino-functional organopolysiloxane, an unsaturated carboxylic acid or carboxylic acid salt, and combinations thereof. Further, the additive includes a hydrosilylation reactive group present at a surface of the substrate for reaction with the addition-curable material. This improves adherence of the substrate with the addition-curable material. The substrate and the addition-curable material bond together to make the composition article.
    Type: Grant
    Filed: November 12, 2010
    Date of Patent: December 27, 2011
    Assignee: Dow Corning Corporation
    Inventors: Dongchan Ahn, Nick Evan Shepard, Harold Christian Fowler, Kevin Louis Nichols, John Matthew Warakomski
  • Publication number: 20110294958
    Abstract: A non-random copolymer is formed, and its structure controlled, using a method including the step of combining a mixture of a first radical polymerizable compound and an organoborane initiator, a second radical polymerizable compound, and an organoborane decomplexing agent, at a rate sufficient to form the non-random copolymer. The non-random copolymer may be a silicon gradient polymer. To form the silicon gradient copolymer, the first and second radical polymerizable compounds are polymerized in the presence of the organoborane initiator and the organoborane decomplexing agent. The silicon gradient copolymer has a polymer backbone consisting of organic moieties and has at least one silicon containing pendent group.
    Type: Application
    Filed: February 2, 2010
    Publication date: December 1, 2011
    Inventors: Dongchan Ahn, Corissa K. Lee, Christopher L. Wong
  • Patent number: 8013058
    Abstract: A composition and composite article have improved adherence with an addition-curable material. The composition and therefore the composite article, which includes at least one substrate formed from the composition, include a resin and an additive that is incorporated into the resin. The resin is organic and polymeric and free of ethylenically unsaturated and silicon hydride functional groups. The additive is selected from the group of a fluorine-substituted organopolysiloxane, an amino-functional organopolysiloxane, an unsaturated carboxylic acid or carboxylic acid salt, and combinations thereof. Further, the additive includes a hydrosilylation reactive group present at a surface of the substrate for reaction with the addition-curable material. This improves adherence of the substrate with the addition-curable material. The substrate and the addition-curable material bond together to make the composition article.
    Type: Grant
    Filed: November 12, 2010
    Date of Patent: September 6, 2011
    Assignee: Dow Corning Corporation
    Inventors: Dongchan Ahn, Nick Evan Shepard, Harold Christian Fowler, Kevin Louis Nichols, John Matthew Warakomski
  • Publication number: 20110135923
    Abstract: A composite article includes a substrate and a pressure sensitive adhesive (PSA) disposed on the substrate. The PSA includes a polymer formed from at least one radical curable organic compound polymerized in the presence of an organoborane initiator. The polymer has a polydispersity index of less than or equal to 5.0 and a temperature of softening less than a temperature of use. The composite article is formed by a method including the steps of polymerizing the at least one radical curable organic compound to form the polymer and applying the PSA to the substrate to form the composite article. The polymer is formed by a method including the steps of combining the at least one radical curable organic compound and the organoborane initiator and polymerizing the at least one radical curable organic compound.
    Type: Application
    Filed: July 27, 2009
    Publication date: June 9, 2011
    Inventors: Dongchan Ahn, Timothy Mitchell
  • Publication number: 20110129683
    Abstract: A radical polymerizable composition includes a radical polymerizable compound and an organoborane-azole complex. The organoborane-azole complex includes an azole having at least two nitrogen atoms wherein at least one nitrogen atom is an sp3 nitrogen atom and is substituted. A method of forming the composition includes the step of combining the radical polymerizable compound and the organoborane-azole complex to form the composition. The method also includes the step of polymerizing the composition. A composite article which includes a substrate and a cured composition disposed on the substrate is also provided. The cured composition is formed from polymerization of the composition.
    Type: Application
    Filed: July 27, 2009
    Publication date: June 2, 2011
    Inventors: Dongchan Ahn, Gang Lu
  • Patent number: 7928174
    Abstract: Organosilicon functional boron amine catalyst complexes have an organosilicon functional organoborane portion of the complex that contains at least one silicon atom. The complexes can be used as components in curable compositions containing (i) a free radical polymerizable monomer, oligomer or polymer; (ii) the organosilicon functional boron amine catalyst complex; and (iii) an amine reactive compound having amine reactive groups. The curable compositions may contain a component capable of generating a gas, as well as various other optional ingredients. These curable compositions can be used as rubbers, tapes, adhesives, protective coatings, thin films, thermoplastic monolithic molded parts, thermosetting monolithic molded parts, sealants, foams, gaskets, seals, o-rings, pressure sensitive adhesives, die attachment adhesives, lid sealants, encapsulants, potting compounds, conformal coatings, and electronic components.
    Type: Grant
    Filed: December 13, 2005
    Date of Patent: April 19, 2011
    Assignee: Dow Corning Corporation
    Inventors: Dongchan Ahn, Mohamed Mustafa, Patricia Olney
  • Publication number: 20110060099
    Abstract: A composition and composite article have improved adherence with an addition-curable material. The composition and therefore the composite article, which includes at least one substrate formed from the composition, include a resin and an additive that is incorporated into the resin. The resin is organic and polymeric and free of ethylenically unsaturated and silicon hydride functional groups. The additive is selected from the group of a fluorine-substituted organopolysiloxane, an amino-functional organopolysiloxane, an unsaturated carboxylic acid or carboxylic acid salt, and combinations thereof. Further, the additive includes a hydrosilylation reactive group present at a surface of the substrate for reaction with the addition-curable material. This improves adherence of the substrate with the addition-curable material. The substrate and the addition-curable material bond together to make the composition article.
    Type: Application
    Filed: November 12, 2010
    Publication date: March 10, 2011
    Applicant: DOW CORNING CORPORATION
    Inventors: Dongchan Ahn, Nick Evan Shepard, Harold Christian Fowler, Kevin Louis Nichols, John Matthew Warakomski
  • Publication number: 20110060092
    Abstract: A composition and composite article have improved adherence with an addition-curable material. The composition and therefore the composite article, which includes at least one substrate formed from the composition, include a resin and an additive that is incorporated into the resin. The resin is organic and polymeric and free of ethylenically unsaturated and silicon hydride functional groups. The additive is selected from the group of a fluorine-substituted organopolysiloxane, an amino-functional organopolysiloxane, an unsaturated carboxylic acid or carboxylic acid salt, and combinations thereof. Further, the additive includes a hydrosilylation reactive group present at a surface of the substrate for reaction with the addition-curable material. This improves adherence of the substrate with the addition-curable material. The substrate and the addition-curable material bond together to make the composition article.
    Type: Application
    Filed: November 12, 2010
    Publication date: March 10, 2011
    Applicant: DOW CORNING CORPORATION
    Inventors: Dongchan AHN, Nick Evan SHEPARD, Harold Christian FOWLER, Kevin Louis NICHOLS, John Matthew WARAKOMSKI
  • Patent number: 7858197
    Abstract: A composition and composite article have improved adherence with an addition-curable material. The composition and therefore the composite article, which includes at least one substrate formed from the composition, include a resin and an additive that is incorporated into the resin. The resin is organic and polymeric and free of ethylenically unsaturated and silicon hydride functional groups. The additive is selected from the group of a fluorine-substituted organopolysiloxane, an amino-functional organopolysiloxane, an unsaturated carboxylic acid or carboxylic acid salt, and combinations thereof. Further, the additive includes a hydrosilylation reactive group present at a surface of the substrate for reaction with the addition-curable material. This improves adherence of the substrate with the addition-curable material. The substrate and the addition-curable material bond together to make the composition article.
    Type: Grant
    Filed: January 21, 2005
    Date of Patent: December 28, 2010
    Assignee: Dow Corning Corporation
    Inventors: Dongchan Ahn, Nick Evan Shepard, Harold Christian Fowler, Kevin Louis Nichols, John Matthew Warakomski
  • Patent number: 7850870
    Abstract: Conductive curable compositions contain a free radical polymerizable monomer, oligomer or polymer (i); an organoborane amine complex (ii), and an electrically or thermally conductive filler (iii). The conductive curable compositions can also contain an amine reactive compound having amine reactive groups (iv); and (v) a component capable of generating a gas when mixed with a compound bearing active hydrogen and a catalyst. The electrically conductive curable compositions can be used in composite articles of manufacture in which substrates are coated or bonded together with the composition and cured; and as electrically conductive rubbers, electrically conductive tapes, electrically conductive adhesives, electrically conductive foams, and electrically conductive pressure sensitive adhesives.
    Type: Grant
    Filed: October 4, 2005
    Date of Patent: December 14, 2010
    Assignee: Dow Corning Corporation
    Inventors: Dongchan Ahn, Mark David Fisher, Andrew Anthony Mojica
  • Publication number: 20100221429
    Abstract: A pattern is formed and developed on a surface with an ink system comprising (i) a free radical polymerizable monomer, oligomer or polymer, (ii) an organoborane amine complex, (iii) an amine reactive compound, and (iv) oxygen. Components (i)-(iv) are distributed between an ink and a developing medium. The ink formed on the surface in a pattern is developed by exposure of the ink to the developing medium. Component (iv) may be present as naturally occurring in the air. The method has the advantage of developing polymeric and polymer composite patterns rapidly in ambient air, without heating or irradiation. The ink system can be applied to inorganic and organic surfaces, and is particularly useful for polymeric surfaces such as low energy plastics. The composition can be applied to inorganic and organic surfaces, and is particularly useful for polymeric surfaces such as low energy plastics.
    Type: Application
    Filed: August 3, 2006
    Publication date: September 2, 2010
    Inventor: Dongchan Ahn
  • Patent number: 7732543
    Abstract: Curable compositions contain (i) a free radical polymerizable organosilicon monomer, oligomer or polymer; (ii) an organoborane amine complex; optionally (iii) an amine reactive compound having amine reactive groups; and optionally (iv) a component capable of generating a gas when mixed with a compound bearing active hydrogen and a catalyst. The curable compositions can be used as a rubber, tape, adhesive, foam, pressure sensitive adhesive, protective coating, thin film, thermoplastic monolithic molded part, thermosetting monolithic molded part, sealant, gasket, seal, or o-ring, die attachment adhesive, lid sealant, encapsulant, potting compound, or conformal coating. The compositions can also be used in composite articles of manufacture such as integrally bonded device including electrical and electronic connectors and scuba diving masks, in which substrates are coated or bonded together with the composition and cured.
    Type: Grant
    Filed: December 13, 2005
    Date of Patent: June 8, 2010
    Assignee: Dow Corning Corporation
    Inventors: Cheryl Lynn Loch, Dongchan Ahn, Nick Evan Shephard, James Steven Tonge, Patricia Ann Olney
  • Patent number: 7649068
    Abstract: A polymerized product is obtained from a mixture containing (i) a free radical polymerizable monomer, oligomer or polymer; (ii) an organoborane amine complex, (iii) a poor or non-solvent for the polymerized product of (i); and (iv) an amine reactive compound. The mixture may include (v) an active ingredient to be encapsulated by the polymerized product, and (vi) an optional component(s). Polymer particles are obtained by (A) forming a composition containing components (i)-(iv); (B) agitating components (i)-(iv) in the presence of oxygen to initiate polymerization, at a rate and for a time sufficient to provide a uniform dispersion and reaction of the components; (C) allowing the reaction to proceed to completion at room temperature; and (D) recovering the polymer particles by removing component (iii). The composition may include (v) the active ingredient to be encapsulated by the polymer particles.
    Type: Grant
    Filed: January 11, 2006
    Date of Patent: January 19, 2010
    Assignee: Dow Corning Corporation
    Inventor: Dongchan Ahn
  • Publication number: 20090306307
    Abstract: A curable organosilicon composition includes a radical curable organosilicon compound, an organoborane amine complex, a condensation curable organosilicon compound, a condensation cure catalyst, and a condensation-reactive cross-linking compound. The curable organosilicon composition may further include an amine-reactive compound. A method of forming the curable organosilicon composition introduces the organoborane-amine complex and the amine-reactive compound into separate reaction vessels. The curable organosilicon composition is used to form various articles.
    Type: Application
    Filed: June 19, 2007
    Publication date: December 10, 2009
    Inventors: Dongchan Ahn, Patricia A. Olney