Patents by Inventor Ashish K. Khandpur

Ashish K. Khandpur 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).

  • Adhesive for bonding to low surface energy surfaces
    Patent number: 7491434
    Abstract: A novel polymodal asymmetric elastomeric block copolymer and a pressure sensitive adhesive, tape and adhesive backed article made therefrom, such as a polymer foam article having a substantially smooth surface prepared by melt-mixing a polymer composition and a plurality of microspheres, at least one of which is an expandable polymeric microsphere, under process conditions, including temperature and shear rate, selected to form an expandable extrudable composition; and extruding the composition through a die.
    Type: Grant
    Filed: June 15, 2004
    Date of Patent: February 17, 2009
    Assignee: 3M Innovative Properties Company
    Inventors: Ashish K. Khandpur, JingJing Ma, Mark D. Gehlsen, Bradley S. Momchilovich, John J. Stradinger
  • Adhesive for bonding to low surface energy surfaces
    Patent number: 7163741
    Abstract: A novel polymodal asymmetric elastomeric block copolymer and a pressure sensitive adhesive, tape and adhesive backed article made therefrom, such as a polymer foam article having a substantially smooth surface prepared by melt-mixing a polymer composition and a plurality of microspheres, at least one of which is an expandable polymeric microsphere, under process conditions, including temperature and shear rate, selected to form an expandable extrudable composition; and extruding the composition through a die.
    Type: Grant
    Filed: July 1, 2003
    Date of Patent: January 16, 2007
    Assignee: 3M Innovative Properties Company
    Inventors: Ashish K. Khandpur, Jingjing Ma, Mark D. Gehlsen, Bradley S. Momchilovich, John J. Stradinger
  • Adhesive for bonding to low surface energy surfaces
    Publication number: 20040229000
    Abstract: A novel polymodal asymmetric elastomeric block copolymer and a pressure sensitive adhesive, tape and adhesive backed article made therefrom, such as a polymer foam article having a substantially smooth surface prepared by melt-mixing a polymer composition and a plurality of microspheres, at least one of which is an expandable polymeric microsphere, under process conditions, including temperature and shear rate, selected to form an expandable extrudable composition; and extruding the composition through a die.
    Type: Application
    Filed: June 15, 2004
    Publication date: November 18, 2004
    Applicant: 3M Innovative Properties Company
    Inventors: Ashish K. Khandpur, JingJing Ma, Mark D. Gehlsen, Bradley S. Momchilovich, John J. Stradinger
  • Block copolymer melt-processable compositions, methods of their preparation, and articles therefrom
    Patent number: 6806320
    Abstract: Described are melt-processable block copolymers and compositions, embodiments of which may be useful in applications such as pressure sensitive adhesive (PSA) or heat-activatable adhesive, comprising polymeric end block and polymeric B block, wherein end block comprises copolymer and the B block comprises homopolymer or copolymer.
    Type: Grant
    Filed: November 15, 2002
    Date of Patent: October 19, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Albert I. Everaerts, JingJing Ma, Ashish K. Khandpur, Francois C. D'Haese, Jianhui Xia, Lang N. Nguyen
  • Block copolymer melt-processable compositions, methods of their preparation, and articles therefrom
    Publication number: 20040097658
    Abstract: Described are melt-processable block copolymers and compositions, embodiments of which may be useful in applications such as pressure sensitive adhesive (PSA) or heat-activatable adhesive, comprising polymeric end block and polymeric B block, wherein end block comprises copolymer and the B block comprises homopolymer or copolymer.
    Type: Application
    Filed: November 15, 2002
    Publication date: May 20, 2004
    Inventors: Albert I. Everaerts, JingJing Ma, Ashish K. Khandpur, Francois C. D'Haese, Jianhui Xia, Lang N. Nguyen
  • Adhesive for bonding to low surface energy surfaces
    Publication number: 20040082700
    Abstract: A novel polymodal asymmetric elastomeric block copolymer and a pressure sensitive adhesive, tape and adhesive backed article made therefrom, such as a polymer foam article having a substantially smooth surface prepared by melt-mixing a polymer composition and a plurality of microspheres, at least one of which is an expandable polymeric microsphere, under process conditions, including temperature and shear rate, selected to form an expandable extrudable composition; and extruding the composition through a die.
    Type: Application
    Filed: July 1, 2003
    Publication date: April 29, 2004
    Applicant: 3M Innovative Properties Company
    Inventors: Ashish K. Khandpur, Jingjing Ma, Mark D. Gehlsen, Bradley S. Momchilovich, John J. Stradinger
  • Adhesive for bonding to low surface energy surfaces
    Publication number: 20030211308
    Abstract: A novel polymodal asymmetric elastomeric block copolymer and a pressure sensitive adhesive, tape and adhesive backed article made therefrom, such as a polymer foam article having a substantially smooth surface prepared by melt-mixing a polymer composition and a plurality of microspheres, at least one of which is an expandable polymeric microsphere, under process conditions, including temperature and shear rate, selected to form an expandable extrudable composition; and extruding the composition through a die.
    Type: Application
    Filed: December 9, 2002
    Publication date: November 13, 2003
    Inventors: Ashish K Khandpur, JingJing Ma, Mark D Gehlsen, Bradley S Momchilovich, John J Stradinger
  • Adhesive for bonding to low surface energy surfaces
    Patent number: 6630531
    Abstract: A novel polymodal asymmetric elastomeric block copolymer and a pressure sensitive adhesive, tape and adhesive backed article made therefrom, such as a polymer foam article having a substantially smooth surface prepared by melt-mixing a polymer composition and a plurality of microspheres, at least one of which is an expandable polymeric microsphere, under process conditions, including temperature and shear rate, selected to form an expandable extrudable composition; and extruding the composition through a die.
    Type: Grant
    Filed: February 2, 2000
    Date of Patent: October 7, 2003
    Assignee: 3M Innovative Properties Company
    Inventors: Ashish K. Khandpur, Jingjing Ma, Mark D. Gehlsen, Bradley S. Momchilovich, John J. Stradinger
  • High cohesive strength pressure sensitive adhesive foam
    Publication number: 20030082362
    Abstract: A foamed pressure sensitive adhesive article is disclosed. The article includes a polymeric mixture containing a styrenic block copolymer and a polyarylene oxide polymer. Voids are formed in the polymeric mixture by expanding polymeric microspheres. The resulting foamed article contains numerous voids having substantially non-adhesive interiors that are compressible without collapsing. The invention is also directed to methods of making foamed pressure sensitive adhesive articles.
    Type: Application
    Filed: July 31, 2001
    Publication date: May 1, 2003
    Inventors: Ashish K. Khandpur, Mark D. Gehlsen, Kenneth J. Hanley, John J. Stradinger, Patrick J. Fischer, Eugene C. Ostertag
  • Pressure-sensitive adhesive blends comprising ethylene/propylene-derived polymers and propylene-derived polymers and articles therefrom
    Patent number: 6489400
    Abstract: The present invention relates to a blend of at least one amorphous ethylene/propylene-derived copolymer, at least one non-stereoregular propylene-derived polymer having a melt viscosity of greater than about 500 Poise, and an optional tackifier that provide pressure-sensitive adhesive compositions in which a good balance of adequate adhesion to both low and relatively high surface energy substrates can be achieved.
    Type: Grant
    Filed: December 21, 2000
    Date of Patent: December 3, 2002
    Assignee: 3M Innovative Properties Company
    Inventors: Ashish K. Khandpur, Greggory S. Bennett, Allen R. Siedle
  • Pressure sensitive adhesive blends comprising (meth) acrylate polymers and articles therefrom
    Publication number: 20020136891
    Abstract: The present invention relates to a blend of at least one (meth)acrylate polymer and at least one amorphous propylene-derived polymer, and an optional tackifier that provide pressure sensitive adhesive compositions in which improved peel adhesion to at least one of low and relatively high surface energy substrates can be achieved.
    Type: Application
    Filed: December 29, 2000
    Publication date: September 26, 2002
    Applicant: 3M Innovative Properties Company
    Inventors: Ashish K. Khandpur, Eugene G. Joseph, Greggory S. Bennett
  • Pressure sensitive adhesive blends comprising (meth)acrylate polymers and articles therefrom
    Patent number: 6455634
    Abstract: The present invention relates to a blend of at least one (meth)acrylate polymer and at least one amorphous propylene-derived polymer, and an optional tackifier that provide pressure sensitive adhesive compositions in which improved peel adhesion to at least one of low and relatively high surface energy substrates can be achieved.
    Type: Grant
    Filed: December 29, 2000
    Date of Patent: September 24, 2002
    Assignee: 3M Innovative Properties Company
    Inventors: Ashish K. Khandpur, Eugene G. Joseph, Greggory S. Bennett
  • Pressure-sensitive adhesive blends comprising ethylene/propylene-derived polymers and propylene-derived polymers and articles therefrom
    Publication number: 20020120064
    Abstract: The present invention relates to a blend of at least one amorphous ethylene/propylene-derived copolymer, at least one non-stereoregular propylene-derived polymer having a melt viscosity of greater than about 500 Poise, and an optional tackifier that provide pressure-sensitive adhesive compositions in which a good balance of adequate adhesion to both low and relatively high surface energy substrates can be achieved.
    Type: Application
    Filed: December 21, 2000
    Publication date: August 29, 2002
    Applicant: 3M Innovative Properties Company
    Inventors: Ashish K. Khandpur, Greggory S. Bennett, Allen R. Siedle
  • Fibers of polydiorganosiloxane polyurea copolymers
    Patent number: 6007914
    Abstract: The present invention provides fibers and products produced therefrom, including nonwoven webs and adhesive articles. The fibers, which can be multilayer fibers, include a polydiorganosiloxane polyurea copolymer.
    Type: Grant
    Filed: December 1, 1997
    Date of Patent: December 28, 1999
    Assignee: 3M Innovative Properties Company
    Inventors: Eugene G. Joseph, Ashish K. Khandpur, Audrey A. Sherman, Mieczyslaw H. Mazurek, Walter R. Romanko