Patents by Inventor Richard Tien-Hua Chou

Richard Tien-Hua Chou 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).

  • Publication number: 20220119630
    Abstract: An aqueous ionomer dispersion, and method of manufacturing thereof, comprising an ionomer composition and water, wherein the ionomer composition comprises: a) at least 20 wt. %, based on the total weight percent of the ionomer composition, of an ionomer; and b) up to 80 wt. %, based on the total weight percent of the ionomer composition, of a polyolefin.
    Type: Application
    Filed: December 17, 2019
    Publication date: April 21, 2022
    Inventors: Robert S. Moglia, Stacey A. Saba, Hari Katepalli, Matthew J. Crimmins, Jessica Ye Huang, James Richard De Garavilla, Richard Tien Hua Chou, Barry Alan Morris
  • Publication number: 20210395540
    Abstract: An aqueous ionomer dispersion, and method of manufacturing thereof, comprising an ionomer composition and water, wherein the ionomer composition comprises: a) at least 20 wt. %, based on the total weight percent of the ionomer composition, of an ionomer; and b) up to 80 wt. %, based on the total weight percent of the ionomer composition, of a polyolefin.
    Type: Application
    Filed: December 17, 2019
    Publication date: December 23, 2021
    Inventors: Robert S. Moglia, Stacey A. Saba, Hari Katepalli, Matthew J. Crimmins, Jessica Ye Huang, James Richard De Garavilla, Richard Tien Hua Chou, Barry Alan Morris, Daniel L. Dermody, Kyle Anderson
  • Publication number: 20210380775
    Abstract: Disclosed herein is a foamed composition comprising 55 to 98 wt. % of polyamide, and 2 to 45 wt. % of innomer comprising a zinc neutralized ethylene acid copolymer. The zinc neutralized ethylene acid copolymer is the polymerized reaction product of ethylene monomer, monocarboxylic acid monomer, and unsaturated dicarboxylic acid monomer, and 30 to 70 mole percent of total acid units of the ionomer are neutralized.
    Type: Application
    Filed: September 28, 2018
    Publication date: December 9, 2021
    Applicant: Performance Materials NA, Inc.
    Inventors: Jinliang Yan, Richard Tien Hua Chou, Karlheinz Hausmann, Zhongyu Wang
  • Publication number: 20210317291
    Abstract: Disclosed herein is a foamable composition comprising an olefin copolymer that comprises ethylene and an ?-olefin; an unneutralized carboxylated olefin copolymer; a crosslinking agent; a blowing agent; and an activator; where a weight ratio of the activator to the unneutralized carboxylated olefin copolymer is greater than 0.3. Disclosed herein too is a method of manufacturing a foamable composition comprising blending together an olefin copolymer that comprises ethylene and an ?-olefin; an unneutralized carboxylated olefin copolymer; a crosslinking agent; a blowing agent; and an activator to form the foamable composition; where a weight ratio of the activator to the unneutralized carboxylated olefin copolymer is greater than 0.3; heating the foamable composition to activate the blowing agent to form a foam; and crosslinking the foam.
    Type: Application
    Filed: August 31, 2018
    Publication date: October 14, 2021
    Applicants: Dow Global Technologies LLC, Performance Materials NA, Inc.
    Inventors: Haiyang Yu, Jinliang Yan, Shanshan Feng, Richard Tien-Hua Chou
  • Publication number: 20210269566
    Abstract: According to one embodiment, an ionomer includes a neutralized blend of an ethylene acid copolymer. The ethylene acid copolymer comprises the polymerized reaction product of ethylene; from 2 to 20 wt. % of monocarboxylic acid monomer based on the total wt. % of the monomers present in the ethylene acid copolymer; from 2 to 15 wt. % of unsaturated dicarboxylic acid monomer based on the total wt. % of the monomers present in the ethylene acid copolymer. In the ionomer 10 to 60% of total acid units of the ethylene acid copolymer are neutralized by a magnesium cation.
    Type: Application
    Filed: July 26, 2019
    Publication date: September 2, 2021
    Applicant: Performance Materials NA, Inc.
    Inventor: Richard Tien Hua Chou
  • Publication number: 20210261762
    Abstract: According to one embodiment, an ionomer includes a neutralized blend of an ethylene acid copolymer and an aliphatic, mono-functional organic acid. The blend includes from 60 to 95 wt. %, based on the total wt. % of the blend, and from 5 to 40 wt. % of the aliphatic, mono-functional organic acid based on the total wt. % of the blend. The ethylene acid copolymer being the polymerized reaction product of: ethylene, alkyl acrylate; optionally monocarboxylic acid monomer; and unsaturated dicarboxylic acid monomer. At least 30 mole percent of total acid units of the blend are neutralized with a magnesium cation of the magnesium neutralizing salt.
    Type: Application
    Filed: July 29, 2019
    Publication date: August 26, 2021
    Applicant: Performance Materials NA, Inc.
    Inventor: Richard Tien Hua Chou
  • Patent number: 6680082
    Abstract: The present invention relates to neutralized copolymer resins having at least two different metals with one of the metals being zinc. These mixed metal resins are transformed into particulate or powder form for application to metal objects. The powder composition has a good balance of properties including all the advantages associated with neutralized ethylene acid copolymers while also having good powder coating behavior for coatings applied to metal objects. The invention also relates to coated metal objects containing the powder composition and metal.
    Type: Grant
    Filed: October 3, 2002
    Date of Patent: January 20, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Richard Tien-Hua Chou, Mark Bernard Kelly
  • Publication number: 20030065103
    Abstract: The present invention relates to neutralized copolymer resins having at least two different metals with one of the metals being zinc. These mixed metal resins are transformed into particulate or powder form for application to metal objects. The powder composition has a good balance of properties including all the advantages associated with neutralized ethylene acid copolymers while also having good powder coating behavior for coatings applied to metal objects. The invention also relates to coated metal objects containing the powder composition and metal.
    Type: Application
    Filed: October 3, 2002
    Publication date: April 3, 2003
    Inventors: Richard Tien-Hua Chou, Mark Bernard Kelly
  • Patent number: 5902869
    Abstract: Ethylene/(meth)acrylic acid copolymers which have improved melt-thermal stability are described. The copolymers contain an intrachain anhydride unit derived from an additional comonomer which is an anhydride or anhydride forming comonomer, such as maleic anhydride and maleic acid or its monomethyl ester, present at a level of 0.05 to 3.0 weight percent. Measured properties of the terpolymers, other than thermal stability, are about the same as comparable ethylene/(meth)acrylic acid copolymers with no anhydride monomer.
    Type: Grant
    Filed: January 9, 1997
    Date of Patent: May 11, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Richard Tien-Hua Chou
  • Patent number: 5882519
    Abstract: Ethylene/carboxylic acid ionomers may be made, using a meltspun, and particularly meitblown process, into microfibers and thence to filter webs which are efficient gas filters for removing particles having a diameter of from 0.5 to 20 microns from a gas. The webs are effective without a deliberate specific post-charging operation during production. A deliberate post-charging operation can also be carried out to result in further efficiency.
    Type: Grant
    Filed: July 25, 1997
    Date of Patent: March 16, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Richard Tien-Hua Chou, Patrick Stephen Ireland, Charles John Molnar, Hyun Sung Lim, Hyunkook Shin
  • Patent number: 5859137
    Abstract: New ethylene/acid copolymer ionomers which contain both (meth)acrylic acid and certain dicarboxylic acid monomers are described. The polymers may be melt processed as readily as ethylene/(meth)acrylic acid dipolymer ionomers, in contrast to ethylene/acid copolymer ionomers containing only dicarboxylic acid monomer derived in-chain acid units. Polymers with typical levels of (meth)acrylic acid and low levels of diacid provide ionomers comparable to existing ionomers, but which have adhesive and polymer blend compatibilizing characteristics, while polymers with higher levels of diacid will exhibit properties which depend on in-chain diacid derived units.
    Type: Grant
    Filed: March 25, 1998
    Date of Patent: January 12, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Richard Tien-Hua Chou
  • Patent number: 5817415
    Abstract: Ethylene/carboxylic acid ionomers may be made, using a meltspun, and particularly meltblown process, into microfibers and thence to filter webs which are efficient gas filters for removing particles having a diameter of from 0.5 to 20 microns from a gas. The webs are effective without a deliberate specific post-charging operation during production. A deliberate post-charging operation can also be carried out to result in further efficiency.
    Type: Grant
    Filed: September 12, 1996
    Date of Patent: October 6, 1998
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Richard Tien-Hua Chou, Patrick Stephen Ireland, Charles John Molnar, Hyun Sung Lim, Hyunkook Shin
  • Patent number: 5780153
    Abstract: Ethylene/carboxylic acid ionomers may be made, using a meltspun, and particularly meltblown process, into microfibers and thence to filter webs which are efficient gas filters for removing particles having a diameter of from 0.5 to 20 microns from a gas. The webs are effective without a deliberate specific post-charging operation during production. A deliberate post-charging operation can also be carried out to result in further efficiency.
    Type: Grant
    Filed: July 25, 1997
    Date of Patent: July 14, 1998
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Richard Tien-Hua Chou, Patrick Stephen Ireland, Charles John Molnar, Hyun Sung Lim, Hyunkook Shin
  • Patent number: 5723557
    Abstract: Ethylene/(meth)acrylic acid copolymers which have improved melt-thermal stability are described. The copolymers contain an intrachain anhydride unit derived from an additional comonomer which is an anhydride or anhydride forming comonomer, such as maleic anhydride and maleic acid or its monomethyl ester, present at a level of 0.05 to 3.0 weight percent. Measured properties of the terpolymers, other than thermal stability, are about the same as comparable ethylene/(meth)acrylic acid copolymers with no anhydride monomer.
    Type: Grant
    Filed: January 9, 1997
    Date of Patent: March 3, 1998
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Richard Tien-Hua Chou
  • Patent number: 5700890
    Abstract: New ethylene/acid copolymer ionomers which contain both (meth)acrylic acid and certain dicarboxylic acid monomers are described. The polymers may be melt processed as readily as ethylene/(meth)acrylic acid dipolymer ionomers, in contrast to ethylene/acid copolymer ionomers containing only dicarboxylic acid monomer derived in-chain acid units. Polymers with typical levels of (meth)acrylic acid and low levels of diacid provide ionomers comparable to existing ionomers, but which have adhesive and polymer blend compatibilizing characteristics, while polymers with higher levels of diacid will exhibit properties which depend on in-chain diacid derived units.
    Type: Grant
    Filed: February 28, 1997
    Date of Patent: December 23, 1997
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Richard Tien-Hua Chou