Patents by Inventor David P. Dworak

David P. Dworak 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: 11401367
    Abstract: The present invention relates to curable polyurethane polymers made from renewable materials and having polymerization accelerator groups built into the polymer. In particular hydroxylated oleaginous materials derived from plant oils, such as soybean oil, are used. These renewable materials may be formed into curable polyurethane polymers having different chemical functionalities and cure mechanisms.
    Type: Grant
    Filed: June 7, 2018
    Date of Patent: August 2, 2022
    Assignee: Henkel AG & Co. KGaA
    Inventors: Andrew D. Messana, David P. Dworak, Anthony F. Jacobine, Darel Gustafson
  • Patent number: 10889737
    Abstract: The present invention relates to liquid dual curing (moisture) and photocuring adhesives which are optically transparent/clear. More particularly, the present invention relates to liquid optically transparent/clear adhesives having at least one photo- and/or heat-curable polyolefin-based oligomer, with or without a moisture-curable polyolefin-based oligomer; a curative package to trigger and/or accelerate cure of the oligomer(s) under appropriate cure conditions; and at least one polyolefin-based polyurethane that is not reactive under the cure conditions with the photo- and/or heat-curable polyolefin-based oligomer or the moisture-curable polyolefin-based oligomer. The present invention also relates to optical assemblies that include such optically clear adhesives.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: January 12, 2021
    Assignee: HENKEL IP & HOLDING GMBH
    Inventors: Alfred A. DeCato, Shuhua Jin, David P. Dworak
  • Patent number: 10822444
    Abstract: The invention provides reactive resins compounds and compositions made from renewable materials, such as plant and animal oils. The reactive resins compounds and compositions may include an accelerator as part of their structure and are made from renewable materials containing a variety of functional groups. The compositions provide excellent adhesion and sealing capability.
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: November 3, 2020
    Assignee: Henkel IP & Holding GmbH
    Inventors: Andrew D. Messana, David P. Dworak, Darel Gustafson, Anthony F. Jacobine
  • Publication number: 20200277444
    Abstract: Disclosed is a terminally functionalized polysiloxane urethane polymer comprising: polysiloxane segments comprising from 50 to 98% by weight based on the total polymer weight; urethane segments comprising from 2 to 50% by weight based on the total polymer weight; and terminal functional groups selected from (meth)acrylate functional groups, isocyanate functional groups and mixtures thereof. The terminally functionalized polysiloxane urethane polymer finds use in liquid optically clear adhesive formulations wherein it can provide dual photo and moisture cure properties. In some embodiments cured reaction products of the liquid optically clear adhesive composition prepared with the terminally functionalized polysiloxane urethane polymer exhibit low haze of 2% or less and low yellowness b* values of 2 or less as prepared and after aging testing.
    Type: Application
    Filed: May 19, 2020
    Publication date: September 3, 2020
    Inventors: Qinyan Zhu, Yoshihiko Misumi, David P. Dworak, Shuhua Jin
  • Publication number: 20200277445
    Abstract: Disclosed is a terminally functionalized polysiloxane urethane polymer comprising: polysiloxane segments comprising from 50 to 98% by weight based on the total polymer weight; urethane segments comprising from 2 to 50% by weight based on the total polymer weight; and terminal functional groups selected from (meth)acrylate functional groups, alkoxysilyl functional groups and mixtures thereof. The terminally functionalized polysiloxane urethane polymer finds use in liquid optically clear adhesive formulations wherein it can provide dual photo and moisture cure properties. In some embodiments cured reaction products of the liquid optically clear adhesive composition prepared with the terminally functionalized polysiloxane urethane polymer exhibit low haze of 2% or less and low yellowness b* values of 2 or less as prepared and after aging testing.
    Type: Application
    Filed: May 20, 2020
    Publication date: September 3, 2020
    Inventors: Shuhua Jin, David P. Dworak, Qinyan Zhu, Alfred A. DeCato, Christina Despotopoulou
  • Patent number: 10414845
    Abstract: A method of preparing high molecular weight poly(meth)acrylate polymers having narrow polydispersity indices (PDIs) by coupling poly(meth)acrylate building block units which themselves have narrow PDIs. The building block units have halogenated terminations, which when reacted with selected coupling agents, from the high molecular weight poly(meth)acrylate polymers.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: September 17, 2019
    Assignee: Henkel IP & Holding GmbH
    Inventors: Anthony F. Jacobine, John G. Woods, David P. Dworak, Darel Gustafson
  • Patent number: 10287368
    Abstract: A process for preparing moisture curable compounds and moisture curable compositions prepared from the product of that process is provided.
    Type: Grant
    Filed: December 7, 2016
    Date of Patent: May 14, 2019
    Assignee: Henkel IP & Holding GmbH
    Inventors: David P. Dworak, Philip T. Klemarczyk, Anthony F. Jacobine
  • Publication number: 20190071528
    Abstract: A process for preparing moisture curable compounds and moisture curable compositions prepared from the product of that process is provided.
    Type: Application
    Filed: November 7, 2018
    Publication date: March 7, 2019
    Inventors: Philip T. Klemarczyk, David P. Dworak
  • Publication number: 20180319920
    Abstract: The invention provides reactive resins compounds and compositions made from renewable materials, such as plant and animal oils. The reactive resins compounds and compositions may include an accelerator as part of their structure and are made from renewable materials containing a variety of functional groups. The compositions provide excellent adhesion and sealing capability.
    Type: Application
    Filed: April 16, 2018
    Publication date: November 8, 2018
    Inventors: Andrew D. Messana, David P. Dworak, Darel Gustafson, Anthony F. Jacobine
  • Publication number: 20180305594
    Abstract: The present invention relates to liquid dual curing (moisture) and photocuring adhesives which are optically transparent/clear. More particularly, the present invention relates to liquid optically transparent/clear adhesives having at least one photo- and/or heat-curable polyolefin-based oligomer, with or without a moisture-curable polyolefin-based oligomer; a curative package to trigger and/or accelerate cure of the oligomer(s) under appropriate cure conditions; and at least one polyolefin-based polyurethane that is not reactive under the cure conditions with the photo- and/or heat-curable polyolefin-based oligomer or the moisture-curable polyolefin-based oligomer. The present invention also relates to optical assemblies that include such optically clear adhesives.
    Type: Application
    Filed: June 28, 2018
    Publication date: October 25, 2018
    Inventors: Alfred A. DECATO, Shuhua JIN, David P. DWORAK
  • Publication number: 20180282467
    Abstract: The present invention relates to curable polyurethane polymers made from renewable materials and having polymerization accelerator groups built into the polymer. In particular hydroxylated oleaginous materials derived from plant oils, such as soybean oil, are used. These renewable materials may be formed into curable polyurethane polymers having different chemical functionalities and cure mechanisms.
    Type: Application
    Filed: June 7, 2018
    Publication date: October 4, 2018
    Inventors: Andrew D. Messana, David P. Dworak, Anthony F. Jacobine, Darel Gustafson
  • Publication number: 20180022848
    Abstract: The present invention relates to curable polyurethane polymers made from renewable materials. In particular isosorbide derived from glucose is used. These renewable materials may be formed into curable polyurethane polymer compositions having different chemical functionalities and cure mechanisms.
    Type: Application
    Filed: October 3, 2017
    Publication date: January 25, 2018
    Inventors: David P. Dworak, Darel Gustafson, David Mullen, Andrew D. Messana, Aimee Hynes, Deirdre Ledwith, Ruairi O'Kane
  • Publication number: 20170320998
    Abstract: The present invention relates to curable polyurethane polymers made from renewable materials. In particular hydroxylated oleaginous materials derived from plant oils, such as soybean oil, are used. These renewable materials may be formed into curable polyurethane polymers having different chemical functionalities and cure mechanisms.
    Type: Application
    Filed: July 26, 2017
    Publication date: November 9, 2017
    Inventors: Andrew D. Messana, David P. Dworak, Anthony F. Jacobine, Angelica Messana
  • Publication number: 20170298162
    Abstract: A method of preparing high molecular weight poly(meth)acrylate polymers having narrow polydispersity indices (PDIs) by coupling poly(meth)acrylate building block units which themselves have narrow PDIs. The building block units have halogenated terminations, which when reacted with selected coupling agents, from the high molecular weight poly(meth)acrylate polymers.
    Type: Application
    Filed: June 30, 2017
    Publication date: October 19, 2017
    Inventors: Anthony F. Jacobine, John G. Woods, David P. Dworak, Darel Gustafson
  • Patent number: 9725528
    Abstract: The present invention relates to living radical polymerization processes, reaction products of such processes, and compositions containing such reaction products. More particularly, the invention relates to a living radical polymerization to produce branched polymers, in particular branched polyacrylates.
    Type: Grant
    Filed: June 11, 2015
    Date of Patent: August 8, 2017
    Assignee: Henkel IP & Holding GmbH
    Inventors: Anthony Francis Jacobine, John Woods, David P. Dworak, Darel Gustafson
  • Publication number: 20170107306
    Abstract: A process for preparing moisture curable compounds and moisture curable compositions prepared from the product of that process is provided.
    Type: Application
    Filed: December 7, 2016
    Publication date: April 20, 2017
    Inventors: David P. Dworak, Philip T. Klemarczyk, Anthony F. Jocobine
  • Patent number: 9587151
    Abstract: The invention provides anaerobic curable compositions comprising a (meth)acrylate component, at least a portion which comprises a (meth)acrylate-functionalized bio-renewable oleaginous polyurethane polymer, and methods of their production and use. These compositions provide excellent adhesion especially on oily surfaces.
    Type: Grant
    Filed: January 26, 2015
    Date of Patent: March 7, 2017
    Assignee: Henkel IP & Holding GmbH
    Inventors: Andrew D. Messana, David P. Dworak, Angelica Messana, Anthony F. Jacobine, Darel Gustafson
  • Publication number: 20160152752
    Abstract: A process for preparing moisture curable compounds and moisture curable compositions prepared from the product of that process is provided.
    Type: Application
    Filed: February 8, 2016
    Publication date: June 2, 2016
    Inventors: Philip T. Klemarczyk, David P. Dworak
  • Publication number: 20150274851
    Abstract: The present invention relates to living radical polymerization processes, reaction products of such processes, and compositions containing such reaction products. More particularly, the invention relates to a living radical polymerization to produce branched polymers, in particular branched polyacrylates.
    Type: Application
    Filed: June 11, 2015
    Publication date: October 1, 2015
    Inventors: Anthony Francis Jacobine, John Woods, David P. Dworak, Darel Gustafson
  • Patent number: 9090765
    Abstract: The present invention relates to multi-functional polymeric resin blends which have a defined average molecular weight distribution. Additionally each polymeric component of the blend has a polydispersity of from about 1.01 to about 2.50. The average functionality of the blend is from about 1.8 to about 4.0. More particularly, the present invention relates to poly(meth)acrylates having three or more functional groups. These highly functionalized resin blends are desirably prepared using controlled free radical polymerization techniques, such as single electron transfer living radical polymerization (SET-LRP) processes to produce a variety of blended resin systems which have tailored and enhanced properties.
    Type: Grant
    Filed: September 18, 2012
    Date of Patent: July 28, 2015
    Assignee: Henkel IP & Holding GmbH
    Inventors: Joel D. Schall, Eric Hernandez Edo, John G. Woods, David P. Dworak, Philip T. Klemarczyk, Alfred A. DeCato