Patents by Inventor Chai-Jing Chou

Chai-Jing 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).

  • Patent number: 11254848
    Abstract: The present disclosure provides compositions, films and articles containing a random propylene/ethylene copolymer and a substituted phenylene aromatic diester. Polymerization with an improved catalyst system increases the amount of ethylene incorporated into the random propylene/ethylene copolymer backbone which results in improved thermal properties, improved optical properties, and improved heat seal properties.
    Type: Grant
    Filed: July 27, 2012
    Date of Patent: February 22, 2022
    Assignee: W.R. GRACE & CO.-CONN.
    Inventors: Li-Min Tau, Chai-Jing Chou, John Kaarto, Peter S. Martin, William G. Sheard
  • Patent number: 10336840
    Abstract: A composition is provided which comprises a propylene ethylene random copolymer having a melt flow rate (MFR) (as determined according to ASTM D1238, 230° C., 2.16 Kg) of less than 1 g/10 min, a xylene solubles content of less than 7% by weight, an ethylene content of from 3 to 5 percent by weight of the copolymer, and a value equal to or greater than 92 for the product of the Koenig B value times the % mm triads measured on the xylene insoluble fraction of the random copolymer obtained by the wet method. Pipes made from the composition demonstrate improved pressure endurance.
    Type: Grant
    Filed: October 28, 2014
    Date of Patent: July 2, 2019
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Chai-Jing Chou, Daniel W. Baugh, III, John Kaarto, Jan W. Van Egmond, Jeffrey D. Goad, William G. Sheard
  • Patent number: 10093759
    Abstract: A gas-phase process for making a propylene-based polymer in a fluidized-bed reactor, the reactor containing a fluidized bed including polymer product particles and a catalyst, the process having a set of quantitative criteria for maximum monomer partial pressure, maximum reactor temperature, and comonomer content(s) in the propylene-based polymer. The propylene-based polymer may be EBPT or BPRCP. The catalyst may include a catalyst/donor system comprising (1) a supported Ziegler-Natta pro-catalyst, (2) a co-catalyst, and (3) a mixed external electron donor system including (a) an activity limiting agent including at least one carboxylate ester functional group, and (b) a selectivity control agent.
    Type: Grant
    Filed: November 21, 2014
    Date of Patent: October 9, 2018
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Ping Cai, Matthew J. Fedec, Jeffrey D. Goad, Jan W. Van Egmond, Chai-Jing Chou
  • Publication number: 20160289357
    Abstract: A gas-phase process for making a propylene-based polymer in a fluidized-bed reactor, the reactor containing a fluidized bed including polymer product particles and a catalyst, the process having a set of quantitative criteria for maximum monomer partial pressure, maximum reactor temperature, and comonomer content(s) in the propylene-based polymer. The propylene-based polymer may be EBPT or BPRCP. The catalyst may include a catalyst/donor system comprising (1) a supported Ziegler-Natta pro-catalyst, (2) a co-catalyst, and (3) a mixed external electron donor system including (a) an activity limiting agent including at least one carboxylate ester functional group, and (b) a selectivity control agent.
    Type: Application
    Filed: November 21, 2014
    Publication date: October 6, 2016
    Applicant: W. R. Grace & Co.-Conn.
    Inventors: Ping Cai, Matthew J. Fedec, Jeffrey D. Goad, Jan W. Van Egmond, Chai-Jing Chou
  • Publication number: 20160251462
    Abstract: A composition is provided which comprises a propylene ethylene random copolymer having a melt flow rate (MFR) (as determined according to ASTM D1238, 230° C., 2.16 Kg) of less than 1 g/10 min, a xylene solubles content of less than 7% by weight, an ethylene content of from 3 to 5 percent by weight of the copolymer, and a value equal to or greater than 92 for the product of the Koenig B value times the % mm triads measured on the xylene insoluble fraction of the random copolymer obtained by the wet method. Pipes made from the composition demonstrate improved pressure endurance.
    Type: Application
    Filed: October 28, 2014
    Publication date: September 1, 2016
    Applicant: W. R. Grace & Co.-Conn.
    Inventors: Chai-Jing Chou, Daniel W. Baugh, III, John Kaarto, Jan W. Van Egmond, Jeffrey D. Goad, William G. Sheard
  • Patent number: 9085684
    Abstract: The present invention relates to polypropylene impact copolymer compositions which exhibit improved stiffness without degrading the impact resistance performance. The polypropylene impact copolymer comprises a matrix and a dispersed phase. The matrix comprises a polypropylene homopolymer or a propylene/alpha-olefin random copolymer which comprises more than 50 wt. % of units derived from propylene monomer. The matrix should have a relatively high crystallinity, preferably 50% or greater. The polypropylene homopolymer or a propylene/alpha-olefin random copolymer preferably has a MWD between 4 and 8, such as typically obtained using Ziegler-Natta catalysts. The dispersed phase in the impact copolymer comprises an ethylene-propylene copolymer which comprises from 45 to 70 wt. % of units derived from an ethylene monomer. Preferably the dispersed phase comprises from 20 to 50 percent by weight of the polypropylene impact copolymer.
    Type: Grant
    Filed: June 6, 2011
    Date of Patent: July 21, 2015
    Assignee: W.R. Grace & Co.-Conn.
    Inventor: Chai-Jing Chou
  • Publication number: 20140142241
    Abstract: The present disclosure provides a process for producing a wash-free propylene-based polymer with low total ash content for use as dielectric film. The propylene-based polymer contains a substituted phenylene aromatic diester and is suitable as a dielectric material for electrical devices.
    Type: Application
    Filed: July 26, 2012
    Publication date: May 22, 2014
    Inventor: Chai-Jing Chou
  • Publication number: 20140124405
    Abstract: The present disclosure provides compositions, films and articles containing a random propylene/ethylene copolymer and a substituted phenylene aromatic diester. Polymerization with an improved catalyst system increases the amount of ethylene incorporated into the random propylene/ethylene copolymer backbone which results in improved thermal properties, improved optical properties, and improved heat seal properties.
    Type: Application
    Filed: July 27, 2012
    Publication date: May 8, 2014
    Applicant: Dow Global Technologies LLC
    Inventors: Li-Min Tau, Chai-Jing Chou, John Kaarto, Peter S. Martin, William G. Sheard
  • Publication number: 20130131274
    Abstract: The present invention relates to polypropylene impact copolymer compositions which exhibit improved stiffness without degrading the impact resistance performance. The polypropylene impact copolymer comprises a matrix and a dispersed phase. The matrix comprises a polypropylene homopolymer or a propylene/alpha-olefin random copolymer which comprises more than 50 wt. % of units derived from propylene monomer. The matrix should have a relatively high crystallinity, preferably 50% or greater. The polypropylene homopolymer or a propylene/alpha-olefin random copolymer preferably has a MWD between 4 and 8, such as typically obtained using Ziegler-Natta catalysts. The dispersed phase in the impact copolymer comprises an ethylene-propylene copolymer which comprises from 45 to 70 wt. % of units derived from an ethylene monomer. Preferably the dispersed phase comprises from 20 to 50 percent by weight of the polypropylene impact copolymer.
    Type: Application
    Filed: June 6, 2011
    Publication date: May 23, 2013
    Applicant: Dow Global Technologies LLC
    Inventor: Chai-Jing Chou
  • Patent number: 8178623
    Abstract: The present invention relates to polypropylene impact copolymer compositions which exhibit improved stiffness without degrading the impact resistance performance. The polypropylene impact copolymer comprises a matrix and a dispersed phase. The matrix comprises a polypropylene homopolymer or a propylene/alpha-olefin random copolymer which comprises more than 50 wt. % of units derived from propylene monomer. The matrix should have a relatively high crystallinity, preferably 50% or greater. The polypropylene homopolymer or a propylene/alpha-olefin random copolymer preferably has a MWD between 4 and 8, such as typically obtained using Ziegler-Natta catalysts. The dispersed phase in the impact copolymer comprises an ethylene-propylene copolymer which comprises from 45 to 70 wt. % of units derived from an ethylene monomer. Preferably the dispersed phase comprises from 20 to 50 percent by weight of the polypropylene impact copolymer.
    Type: Grant
    Filed: June 10, 2010
    Date of Patent: May 15, 2012
    Assignee: Dow Global Technologies LLC
    Inventor: Chai-Jing Chou
  • Publication number: 20110306731
    Abstract: The present invention relates to polypropylene impact copolymer compositions which exhibit improved stiffness without degrading the impact resistance performance. The polypropylene impact copolymer comprises a matrix and a dispersed phase. The matrix comprises a polypropylene homopolymer or a propylene/alpha-olefin random copolymer which comprises more than 50 wt. % of units derived from propylene monomer. The matrix should have a relatively high crystallinity, preferably 50% or greater. The polypropylene homopolymer or a propylene/alpha-olefin random copolymer preferably has a MWD between 4 and 8, such as typically obtained using Ziegler-Natta catalysts. The dispersed phase in the impact copolymer comprises an ethylene-propylene copolymer which comprises from 45 to 70 wt. % of units derived from an ethylene monomer. Preferably the dispersed phase comprises from 20 to 50 percent by weight of the polypropylene impact copolymer.
    Type: Application
    Filed: June 10, 2010
    Publication date: December 15, 2011
    Applicant: Dow Global Technologies Inc.
    Inventor: Chai-Jing Chou
  • Patent number: 7084199
    Abstract: A polypropylene nanocomposite composition having at least the following two elements. The first element is a maleated polypropylene polymer having a weight average molecular weight greater than 100,000. The second element is a cation exchanging layered silicate material dispersed in the maleated polypropylene so that more than one half of the layers of the cation exchanging layered silicate material are present as one, two, three, four or five layer units upon examination by electron microscopy. A thermoplastic olefin nanocomposite composition can be obtained by interdispersing a thermoplastic elastomer phase with the above-described polypropylene nanocomposite composition.
    Type: Grant
    Filed: December 29, 1999
    Date of Patent: August 1, 2006
    Assignee: The Dow Chemical Company
    Inventors: Chai-Jing Chou, Eddy I. Garcia-Meitin, Lonnie Schilhab, Richard F. Fibiger
  • Patent number: 6869674
    Abstract: A cation exchanging layered material having a cation exchange capacity satisfied by ion-exchangeable organic and inorganic cations, the ion-exchangeable organic cation content of the betastructured cation exchanging layered material being in the range of from ten to ninety-five percent of the cation exchange capacity of the cation exchanging layered material. The structure of the material is unique and is defined as a “betastructure”. A nanocomposite polymer incorporating such a “betastructured” cation exchanging layered material with a polymer.
    Type: Grant
    Filed: May 19, 2003
    Date of Patent: March 22, 2005
    Assignee: Dow Global Technologies Inc.
    Inventors: Malcolm F. Finlayson, Chai-Jing Chou, Michael S. Paquette, Hoang T. Pham, John Newton, Wanda J. Stringfield, Alexander B. Morgan
  • Publication number: 20040033392
    Abstract: A cation exchanging layered material having a cation exchange capacity satisfied by ion-exchangeable organic and inorganic cations, the ion-exchangeable organic cation content of the betastructured cation exchanging layered material being in the range of from ten to ninety-five percent of the cation exchange capacity of the cation exchanging layered material. The structure of the material is unique and is defined as a “betastructure”. A nanocomposite polymer incorporating such a “betastructured” cation exchanging layered material with a polymer.
    Type: Application
    Filed: May 19, 2003
    Publication date: February 19, 2004
    Inventors: Malcolm F. Finlayson, Chai-Jing Chou, Michael S. Paquette, Hoang T. Pham, John Newton, Wanda J. Stringfield, Alexander B. Morgan
  • Publication number: 20020137832
    Abstract: This invention relates to thermoplastic polymer compositions comprising a clay having drip resistance in the Underwriters Laboratories Standard 94 flammability test.
    Type: Application
    Filed: December 13, 2000
    Publication date: September 26, 2002
    Inventors: Samuel A. Ogoe, Chai-jing Chou, Donna C. Scott, Hani Farah
  • Patent number: 6156835
    Abstract: A polymer composite comprising a hydroxy-phenoxyether or polyester polymer matrix having dispersed therein layers of an inorganic material derived from a multilayered inorganic material having organophilic properties. The dispersion of the multilayered inorganic material in the polymer matrix is such that an increase in the average interlayer spacing of the layered inorganic material occurs. This increase in interlayer spacing occurs to a significant extent resulting in the formation of a nanocomposite. The polymers are preferably derived from a diglycidyl ether or ester or an epihalohydrin and a dinucleophile such as a dicarboxylic acid, a difunctional amine, a bisphenol or a sulfonamide. As the organophilic inorganic material clay minerals modified with organic ammonium compounds are used.
    Type: Grant
    Filed: August 5, 1998
    Date of Patent: December 5, 2000
    Assignee: The Dow Chemical Company
    Inventors: Kenneth W. Anderson, Chai-Jing Chou, Jerry E. White, Christine A. Polansky
  • Patent number: 5952093
    Abstract: A polymer composite comprises a polymer matrix having, dispersed therein, layers of an inorganic material derived from a multilayered inorganic material such as clay intercalated with an inorganic intercalant. The multilayered inorganic material may also be intercalated with an organic material.
    Type: Grant
    Filed: February 20, 1997
    Date of Patent: September 14, 1999
    Assignee: The Dow Chemical Company
    Inventors: Kevin L. Nichols, Chai-Jing Chou
  • Patent number: 5717000
    Abstract: This invention relates to a polymer foam prepared by dispersing an organophilic multi-layered material into a melt comprising an olefinic or styrenic polymer having polar functionality so that at least a portion of the polymer intercalates between layers of the particles; and expanding the polymer with a blowing agent under such condition to form the polymer foam. The organophilic multi-layered material can also be dispersed into an olefinic or styrenic monomer, which can then be polymerized to form a polymer melt prior to, or along with the foaming step.
    Type: Grant
    Filed: February 20, 1997
    Date of Patent: February 10, 1998
    Assignee: The Dow Chemical Company
    Inventors: Seema V. Karande, Chai-Jing Chou, Jitka H. Solc, Kyung W. Suh
  • Patent number: 5658653
    Abstract: The invention provides composites of organic polymeric compositions including a matrix of an organic polymer and a filler distributed throughout the matrix, the flier being present in the matrix substantially as separate particles, each about the fundamental particle size of the filler. The fillers are unique mixed metal hydroxide compositions that are obtainable in sub-micron size particles. These particles are layered and have a BET specific surface area in excess of about 100 m.sup.2 /g. An anion of the particulates is selected to be compatible with the organic polymer thereby providing ease of dispersion of the filler particles throughout the polymer matrix.
    Type: Grant
    Filed: November 23, 1994
    Date of Patent: August 19, 1997
    Assignee: The Dow Chemical Company
    Inventors: Clive P. Bosnyak, John L. Burba, III, Malcolm F. Finlayson, Arthur E. Read, Jr., Chai-Jing Chou
  • Patent number: 5416148
    Abstract: A blend of polycarbonate and a substantially linear ethylene polymer which has a desirable balance of impact and solvent resistance properties.
    Type: Grant
    Filed: September 9, 1994
    Date of Patent: May 16, 1995
    Assignee: The Dow Chemical Company
    Inventors: Hani Farah, Michael K. Laughner, Chai-Jing Chou, Morgan M. Hughes