Patents by Inventor Yunwa W. Cheung

Yunwa W. Cheung 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: 9352537
    Abstract: Compositions suitable for film comprise at least one ethylene/?-olefin interpolymer, wherein the ethylene/?-olefin interpolymer may have, for example, a Mw/Mn from about 1.7 to about 3.5, at least one melting point, Tm, in degrees Celsius, and a density, d, in grams/cubic centimeter, wherein the numerical values of Tm and d correspond to the relationship: Tm>?2002.9+4538.5(d)?2422.2(d)2.
    Type: Grant
    Filed: January 16, 2014
    Date of Patent: May 31, 2016
    Assignee: Dow Global Technologies LLC
    Inventors: David W. Fuchs, Pradeep Jain, Mehmet Demirors, Pak-Meng Cham, Yunwa W. Cheung
  • Patent number: 8912282
    Abstract: Polymer blends comprise at least one ethylene/?-olefin interpolymer and one or more oil. The oil can be an aromatic oil, napththenic oil, paraffinic oil or a combination thereof. The ethylene/?-olefin interpolymers are random block copolymers comprising at least a hard block and at least a soft block. The resulting blends can be used to make flexible molded articles.
    Type: Grant
    Filed: July 21, 2010
    Date of Patent: December 16, 2014
    Assignee: Dow Global Technologies LLC
    Inventors: Mahalia Soediono, Patricia Ansems Bancroft, Caroline Woelfle, Stephen M. Hoenig, Yunwa W. Cheung
  • Patent number: 8816006
    Abstract: Compositions suitable for film comprise at least one ethylene/?-olefin interpolymer, wherein the ethylene/?-olefin interpolymer may have, for example, a Mw/Mn from about 1.7 to about 3.5, at least one melting point, Tm, in degrees Celsius, and a density, d, in grams/cubic centimeter, wherein the numerical values of Tm and d correspond to the relationship: Tm>?2002.9+4538.5(d)?2422.2(d)2.
    Type: Grant
    Filed: March 15, 2006
    Date of Patent: August 26, 2014
    Assignee: Dow Global Technologies LLC
    Inventors: David W. Fuchs, Pradeep Jain, Mehmet Demirors, Pak-Meng Cham, Yunwa W. Cheung
  • Publication number: 20140141228
    Abstract: Compositions suitable for film comprise at least one ethylene/?-olefin interpolymer, wherein the ethylene/?-olefin interpolymer may have, for example, a Mw/Mn from about 1.7 to about 3.5, at least one melting point, Tm, in degrees Celsius, and a density, d, in grams/cubic centimeter, wherein the numerical values of Tm and d correspond to the relationship: Tm>?2002.9+4538.5(d)?2422.2(d)2.
    Type: Application
    Filed: January 16, 2014
    Publication date: May 22, 2014
    Applicant: Dow Global Technologies LLC
    Inventors: David W. Fuchs, Pradeep Jain, Mehmet Demirors, Pak-Meng Cham, Yunwa W. Cheung
  • Patent number: 8721827
    Abstract: This invention relates to methods of forming an elastic, breathable film/nonwoven layer laminate. In particular, the invention pertains to elastic polymer compositions that can be more easily processed on cast film lines, extrusion lamination or coating lines. The compositions of the present invention preferably comprise an elastomeric polyolefin resin and a high pressure low density type resin.
    Type: Grant
    Filed: August 21, 2012
    Date of Patent: May 13, 2014
    Assignee: Dow Global Technologies LLC
    Inventors: Andy C. Chang, Stephen M. Hoenig, Yunwa W. Cheung, Daniel G. Moldovan, Wenbin Liang, Charles F. Diehl
  • Patent number: 8609779
    Abstract: The invention relates to functionalized interpolymers derived from base olefin interpolymers, which are prepared by polymerizing one or more monomers or mixtures of monomers, such as ethylene and one or more comonomers, to form an interpolymer products having unique physical properties. The functionalized olefin interpolymers contain two or more differing regions or segments (blocks), resulting in unique processing and physical properties.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: December 17, 2013
    Assignee: Dow Global Technologies LLC
    Inventors: William J. Harris, John D. Weaver, Brian W. Walther, Stephen F. Hahn, Yunwa W. Cheung, Pankaj Gupta, Thoi H. Ho, Kenneth N. Reichek, Selim Yalvac, Teresa P. Karjala, Benjamin R. Rozenblat, Cynthia L. Rickey
  • Publication number: 20130048204
    Abstract: This invention relates to methods of forming an elastic, breathable film/nonwoven layer laminate. In particular, the invention pertains to elastic polymer compositions that can be more easily processed on cast film lines, extrusion lamination or coating lines. The compositions of the present invention preferably comprise an elastomeric polyolefin resin and a high pressure low density type resin.
    Type: Application
    Filed: August 21, 2012
    Publication date: February 28, 2013
    Applicant: Dow Global Technologies LLC
    Inventors: Andy C. Chang, Stephen M. Hoenig, Yunwa W. Cheung, Daniel G. Moldovan, Wenbin Liang, Charles F. Diehl
  • Patent number: 8362184
    Abstract: Embodiments of the invention provide a class of mesophase separated butene/?-olefin block interpolymers with controlled block sequences. The butene/?-olefin interpolymers are characterized by an average block index, ABI, which is greater than zero and up to about 1.0 and a molecular weight distribution, Mw/Mn, greater than about 1.4. Preferably, the block index is from about 0.2 to about 1. In addition or alternatively, the block butene/?-olefin interpolymer is characterized by having at least one fraction obtained by Temperature Rising Elution Fractionation (‘TREF’), wherein the fraction has a block index greater than about 0.3 and up to about 1.0 and the butene/?-olefin interpolymer has a molecular weight distribution, Mw/Mn, greater than about 1.4.
    Type: Grant
    Filed: January 30, 2009
    Date of Patent: January 29, 2013
    Assignee: DOW Global Technologies, LLC
    Inventors: Gary R. Marchand, Yunwa W. Cheung, Benjamin C. Poon, Jeffrey D. Weinhold, Kim L. Walton, Pankaj Gupta, Colin Li Pi Shan, Phillip D. Hustad, Roger L. Kuhlman, Edmund M. Carnahan, Eddy I. Garcia-Meitin, Patricia L. Roberts
  • Patent number: 8318864
    Abstract: The invention relates to functionalized interpolymers derived from base olefin interpolymers, which are prepared by polymerizing one or more monomers or mixtures of monomers, such as ethylene and one or more comonomers, to form an interpolymer products having unique physical properties. The functionalized olefin interpolymers contain two or more differing regions or segments (blocks), resulting in unique processing and physical properties.
    Type: Grant
    Filed: February 21, 2011
    Date of Patent: November 27, 2012
    Assignee: Dow Global Technologies LLC
    Inventors: William J. Harris, John D. Weaver, Brian W. Walther, Stephen F. Hahn, Yunwa W. Cheung, Pankaj Gupta, Thoi H. Ho, Kenneth N. Reichek, Selim Yalvac, Teresa P. Karjala, Benjamin R. Rozenblat, Cynthia L. Rickey
  • Patent number: 8293859
    Abstract: Embodiments of the invention provide a class of butene/?-olefin block interpolymers. The butene/?-olefin inter-polymers are characterized by an average block index, ABI, which is greater than zero and up to about 1.0 and a molecular weight distribution, Mw/Mn, greater than about 1.3. Preferably, the block index is from about 0.2 to about 1. In addition or alternatively, the block butene/?-olefin interpolymer is characterized by having at least one fraction obtained by Temperature Rising Elution Fractionation (‘TREF’), wherein the fraction has a block index greater than about 0.3 and up to about 1.0 and the butene/?-olefin interpolymer has a molecular weight distribution, Mw/Mn, greater than about 1.4.
    Type: Grant
    Filed: January 30, 2009
    Date of Patent: October 23, 2012
    Assignee: Dow Global Technologies, LLC
    Inventors: Gary R. Marchand, Yunwa W. Cheung, Benjamin C. Poon, Jeffrey D. Weinhold, Kim L. Walton, Pankaj Gupta, Colin Li Pi Shan, Phillip D. Hustad, Roger L. Kuhlman, Edmund M. Carnahan, Eddy I. Garcia-Meitin, Patricia L. Roberts
  • Patent number: 8273068
    Abstract: This invention relates to polyolefin compositions. In particular, the invention pertains to elastic polymer compositions that can be more easily processed on cast film lines, extrusion lamination or coating lines. The compositions of the present invention preferably comprise an elastomeric polyolefin resin and a high pressure low density type resin.
    Type: Grant
    Filed: January 14, 2008
    Date of Patent: September 25, 2012
    Assignee: Dow Global Technologies LLC
    Inventors: Andy C. Chang, Stephen M. Hoenig, Yunwa W. Cheung, Daniel G. Moldovan, Wenbin Liang, Charles F. Diehl
  • Patent number: 8211982
    Abstract: The invention relates to functionalized interpolymers derived from base olefin interpolymers, which are prepared by polymerizing one or more monomers or mixtures of monomers, such as ethylene and one or more comonomers, to form an interpolymer products having unique physical properties. The functionalized olefin interpolymers contain two or more differing regions or segments (blocks), resulting in unique processing and physical properties.
    Type: Grant
    Filed: February 21, 2011
    Date of Patent: July 3, 2012
    Assignee: Dow Global Technologies LLC
    Inventors: William J. Harris, John D. Weaver, Brian W. Walther, Stephen F. Hahn, Yunwa W. Cheung, Pankaj Gupta, Thoi H. Ho, Kenneth N. Reichek, Selim Yalvac, Teresa P. Karjala, Benjamin R. Rozenblat, Cynthia L. Rickey
  • Patent number: 8124709
    Abstract: Embodiments of the invention provide a class of mesophase separated ethylene/?-olefin block interpolymers with controlled block sequences. The ethylene/?-olefin interpolymers are characterized by an average block index, ABI, which is greater than zero and up to about 1.0 and a molecular weight distribution, Mw/Mn, greater than about 1.4. Preferably, the block index is from about 0.2 to about 1. In addition or alternatively, the block ethylene/?-olefin interpolymer is characterized by having at least one fraction obtained by Temperature Rising Elution Fractionation (‘TREF’), wherein the fraction has a block index greater than about 0.3 and up to about 1.0 and the ethylene/?-olefin interpolymer has a molecular weight distribution, Mw/Mn, greater than about 1.4.
    Type: Grant
    Filed: January 30, 2009
    Date of Patent: February 28, 2012
    Assignee: Dow Global Technologies LLC
    Inventors: Gary R. Marchand, Yunwa W. Cheung, Benjamin C. Poon, Jeffrey D. Weinhold, Kim L. Walton, Pankaj Gupta, Colin Lipishan, Phillip D. Hustad, Roger L. Kuhlman, Edmund M. Carnahan, Eddy I. Garcia-Meitin, Patricia L. Roberts
  • Patent number: 8106139
    Abstract: Embodiments of the invention provide a class of mesophase separated propylene/?-olefin block interpolymers with controlled block sequences. The propylene/?-olefin interpolymers are characterized by an average block index, ABI, which is greater than zero and up to about 1.0 and a molecular weight distribution, Mw/Mn, greater than about 1.4. Preferably, the block index is from about 0.2 to about 1. In addition or alternatively, the block propylene/?-olefin interpolymer is characterized by having at least one fraction obtained by Temperature Rising Elution Fractionation (“TREF”), wherein the fraction has a block index greater than about 0.3 and up to about 1.0 and the propylene/?-olefin interpolymer has a molecular weight distribution, Mw/Mn, greater than about 1.4.
    Type: Grant
    Filed: January 30, 2009
    Date of Patent: January 31, 2012
    Assignee: Dow Global Technologies LLC
    Inventors: Gary R. Marchand, Yunwa W. Cheung, Benjamin C. Poon, Jeffrey D. Weinhold, Kim L. Walton, Pankaj Gupta, Colin Li Pi Shan, Phillip D. Hustad, Roger L. Kuhlman, Edmund M. Carnahan, Eddy I. Garcia-Meitin, Patricia L. Roberts
  • Patent number: 8084537
    Abstract: Disclosed herein are polymer blends comprising at least one ethylene/?-olefin interpolymer and two different poly-olefins which can be homopolymers. The ethylene/?-olefin interpolymers are block copolymers comprising at least a hard block and at least a soft block. In some embodiments, the ethylene/?-olefin interpolymer can function as a compatibilizer between the two polyolefins which may not be otherwise compatible. Methods of making the polymer blends and molded articles made from the polymer blends are also described.
    Type: Grant
    Filed: March 15, 2006
    Date of Patent: December 27, 2011
    Assignee: Dow Global Technologies LLC
    Inventors: Kim L. Walton, Morgan M. Hughes, Yunwa W. Cheung
  • Patent number: 8067319
    Abstract: A fiber is obtainable from or comprises an ethylene/?-olefin interpolymer characterized by an elastic recovery, Re, in percent at 300 percent strain and 1 cycle and a density, d, in grams/cubic centimeter, wherein the elastic recovery and the density satisfy the following relationship: Re>1481?1629(d). Such interpolymer can also be characterized by other properties. The fibers made therefrom have a relatively high elastic recovery and a relatively low coefficient of friction. The fibers can be cross-linked, if desired. Woven or non-woven fabrics can be made from such fibers.
    Type: Grant
    Filed: July 19, 2010
    Date of Patent: November 29, 2011
    Assignee: Dow Global Technologies LLC
    Inventors: Benjamin C. Poon, Yunwa W. Cheung, Shih-Yaw Lai, Ashish Sen, Hongyu Chen, Yuen-Yuen D. Chiu, Rajen M. Patel, Andy C. Chang, Antonios K. Doufas, Hong Peng
  • Patent number: 7989543
    Abstract: An adhesive composition comprises: (i) at least one ethylene/?-olefin interpolymer, (ii) at least one tackifÊer; and (iii) optionally at least one additive, such as a plasticizer, wax and antioxidant. Preferably, the ethylene/?-olefin interpolymer has a Mw/Mn from about 1.7 to about 3.5, at least one melting point, Tm, in degrees Celsius, and a density, d, in grams/cubic centimeter, wherein the numerical values of Tm and d correspond to the relationship: Tm?858.91?1825.3(d)+1112.8(d)2. The composition has relatively higher SAFT temperature and can be used in hot melt adhesives pressure-sensitive adhesives, and thermoplastic marking paints.
    Type: Grant
    Filed: March 15, 2006
    Date of Patent: August 2, 2011
    Assignee: Dow Global Technologies LLC
    Inventors: Teresa P. Karjala, Selim Yalvac, Charles F. Diehl, Yunwa W. Cheung, Cynthia L. Rickey
  • Publication number: 20110152437
    Abstract: The invention relates to functionalized interpolymers derived from base olefin interpolymers, which are prepared by polymerizing one or more monomers or mixtures of monomers, such as ethylene and one or more comonomers, to form an interpolymer products having unique physical properties. The functionalized olefin interpolymers contain two or more differing regions or segments (blocks), resulting in unique processing and physical properties.
    Type: Application
    Filed: February 21, 2011
    Publication date: June 23, 2011
    Inventors: William J. Harris, John D. Weaver, Brian W. Walther, Stephen F. Hahn, Yunwa W. Cheung, Pankaj Gupta, Thoi H. Ho, Kenneth N. Reichek, Selim Yalvac, Teresa P. Karjala, Benjamin R. Rozenblat, Cynthia L. Rickey
  • Publication number: 20110144240
    Abstract: The invention relates to functionalized interpolymers derived from base olefin interpolymers, which are prepared by polymerizing one or more monomers or mixtures of monomers, such as ethylene and one or more comonomers, to form an interpolymer products having unique physical properties. The functionalized olefin interpolymers contain two or more differing regions or segments (blocks), resulting in unique processing and physical properties.
    Type: Application
    Filed: February 21, 2011
    Publication date: June 16, 2011
    Inventors: William J. Harris, John D. Weaver, Brian W. Walther, Stephen F. Hahn, Yunwa W. Cheung, Pankaj Gupta, Thoi H. Ho, Kenneth N. Reichek, Selim Yalvac, Teresa P. Karjala, Benjamin R. Rozenblat, Cynthia L. Rickey
  • Patent number: 7947367
    Abstract: A fiber is obtainable from or comprises an ethylene/?-olefin interpolymer characterized by an elastic recovery, Re, in percent at 300 percent strain and (1) cycle and a density, d, in grams/cubic centimeter, wherein the elastic recovery and the density satisfy the following relationship: Re>1481?1629(d). Such interpolymer can also be characterized by other properties. The fibers made therefrom have a relatively high elastic recovery and a relatively low coefficient of friction. The fibers can be cross-linked, if desired. Woven or non-woven fabrics can be made from such fibers.
    Type: Grant
    Filed: March 15, 2006
    Date of Patent: May 24, 2011
    Assignee: Dow Global Technologies LLC
    Inventors: Benjamin C. Poon, Yunwa W. Cheung, Shih-Yaw Lai, Ashish Sen, Hongyu Chen, Yuen-Yuen D. Chiu, Rajen M. Patel, Andy C. Chang, Antonios K. Doufas, Hong Peng