Patents by Inventor Darshak Desai

Darshak Desai 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: 20230312998
    Abstract: Hot melt adhesive compositions prepared with a mixture of propylene copolymers are disclosed. The hot melt adhesive compositions require little to no oil content while providing high cohesion and excellent adhesion to nonwoven substrates and polymeric films. The hot melt adhesive compositions are particularly suitable for manufacturing absorbent construction articles.
    Type: Application
    Filed: May 31, 2023
    Publication date: October 5, 2023
    Inventors: Darshak Desai, Yuhong Hu
  • Patent number: 10364079
    Abstract: Propylene polymer based packaging films for encapsulating hot melt adhesives are disclosed. The packaging films are readily miscible with the various hot melt adhesive chemistries during the melting stage without deleteriously affecting the adhesive properties, making the packaging film particularly well suited for packaging hot melt adhesives in a pillow, cylinder, pouch, block, cartridge and like forms.
    Type: Grant
    Filed: January 22, 2016
    Date of Patent: July 30, 2019
    Assignee: HENKEL IP & HOLDING GMBH
    Inventors: Jinyu Chen, Yuhong Hu, Darshak Desai
  • Patent number: 9695341
    Abstract: Adhesives, methods to bond substrates together with the adhesives, and articles of manufacture comprising the adhesives are described. It has been discovered that an adhesive with a polymer content greater than 70 weight percent can be formulated with a blend of (i) a metallocene catalyzed polypropylene polymer that has a density range of about 0.70 to about 0.91 g/cm3 and a melt viscosity less than 50,000 cP at 190° C. and (ii) a Ziegler-Natta catalyzed amorphous polybutene and/or polypropylene copolymer. Such adhesives have high creep resistance making them particularly well suited for disposable personal care garments.
    Type: Grant
    Filed: January 31, 2014
    Date of Patent: July 4, 2017
    Assignee: HENKEL IP & HOLDING GMBH
    Inventors: Jennifer Thatcher, Yuhong Hu, Darshak Desai
  • Patent number: 9546304
    Abstract: It has been discovered that amorphous polybutene copolymers that have a softening point of from about 70 to about 105° C. and viscosity of less than about 1,900 cP at 190° C. possesses desirable properties and may be used to make a low application temperature hot melt adhesive for disposable absorbent articles.
    Type: Grant
    Filed: October 13, 2015
    Date of Patent: January 17, 2017
    Assignee: HENKEL IP & HOLDING GMBH
    Inventors: Yuhong Hu, Charles W. Paul, Darshak Desai, Salvador Alvarado
  • Publication number: 20160257028
    Abstract: The present invention relates to a process for producing free-flowing, agglomeration resistant amorphous poly-alpha-olefin based adhesive pellets. The process includes (a) extruding the adhesive through an orifice of a die plate immersed in a cooling fluid; (b) cutting the adhesive into a plurality of pellets in the cooling fluid; (c) solidifying the pellets at a temperature range of about 25° C. to about 40° C. for at least 30 minutes; and (d) separating the pellets from the recrystallization fluid and drying the pellets. The pellets harden at least three folds faster than conventionally formed pellets.
    Type: Application
    Filed: May 16, 2016
    Publication date: September 8, 2016
    Inventors: Darshak DESAI, Yuhong Hu, Ken Gaspar, Ed Hantwerker
  • Patent number: 9364985
    Abstract: The present invention relates to a process for producing free-flowing, agglomeration resistant amorphous poly-alpha-olefin based adhesive pellets. The process includes (a) extruding the adhesive through an orifice of a die plate immersed in a cooling fluid; (b) cutting the adhesive into a plurality of pellets in the cooling fluid; (c) solidifying the pellets at a temperature range of about 25° C. to about 40° C. for at least 30 minutes; and (d) separating the pellets from the recrystallization fluid and drying the pellets. The pellets harden at least three folds faster than conventionally formed pellets.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: June 14, 2016
    Assignee: HENKEL IP & HOLDING GMBH
    Inventors: Darshak Desai, Yuhong Hu, Ken Gaspar, Ed Hantwerker
  • Publication number: 20160137371
    Abstract: Propylene polymer based packaging films for encapsulating hot melt adhesives are disclosed. The packaging films are readily miscible with the various hot melt adhesive chemistries during the melting stage without deleteriously affecting the adhesive properties, making the packaging film particularly well suited for packaging hot melt adhesives in a pillow, cylinder, pouch, block, cartridge and like forms.
    Type: Application
    Filed: January 22, 2016
    Publication date: May 19, 2016
    Inventors: Jinyu Chen, Yuhong Hu, Darshak Desai
  • Patent number: 9272795
    Abstract: Propylene polymer based packaging films for encapsulating hot melt adhesives are disclosed. The packaging films are readily miscible with the various hot melt adhesive chemistries during the melting stage without deleteriously affecting the adhesive properties, making the packaging film particularly well suited for packaging hot melt adhesives in a pillow, cylinder, pouch, block, cartridge and like forms.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: March 1, 2016
    Assignee: HENKEL IP & HOLDING GMBH
    Inventors: Jinyu Chen, Yuhong Hu, Darshak Desai
  • Publication number: 20160032153
    Abstract: It has been discovered that amorphous polybutene copolymers that have a softening point of from about 70 to about 105° C. and viscosity of less than about 1,900 cP at 190° C. possesses desirable properties and may be used to make a low application temperature hot melt adhesive for disposable absorbent articles.
    Type: Application
    Filed: October 13, 2015
    Publication date: February 4, 2016
    Inventors: Yuhong Hu, Charles W. Paul, Darshak Desai, Salvador Alvarado
  • Patent number: 9193891
    Abstract: It has been discovered that amorphous polybutene copolymers that have a softening point of from about 70 to about 105° C. and viscosity of less than about 1,900 cP at 190° C. possesses desirable properties and may be used to make a low application temperature hot melt adhesive for disposable absorbent articles.
    Type: Grant
    Filed: March 2, 2015
    Date of Patent: November 24, 2015
    Assignee: HENKEL IP & HOLDING GMBH
    Inventors: Yuhong Hu, Charles W. Paul, Darshak Desai, Salvador Alvarado
  • Publication number: 20150166851
    Abstract: It has been discovered that amorphous polybutene copolymers that have a softening point of from about 70 to about 105° C. and viscosity of less than about 1,900 cP at 190° C. possesses desirable properties and may be used to make a low application temperature hot melt adhesive for disposable absorbent articles.
    Type: Application
    Filed: March 2, 2015
    Publication date: June 18, 2015
    Inventors: Yuhong Hu, Charles W. Paul, Darshak Desai, Salvador Alvarado
  • Patent number: 9000079
    Abstract: It has been discovered that amorphous polybutene copolymers that have a softening point of from about 70 to about 105° C. and viscosity of less than about 1,900 cP at 190° C. possesses desirable properties and may be used to make a low application temperature hot melt adhesive for disposable absorbent articles.
    Type: Grant
    Filed: February 20, 2013
    Date of Patent: April 7, 2015
    Assignee: Henkel IP & Holding GmbH
    Inventors: Yuhong Hu, Charles W. Paul, Darshak Desai, Salvador Alvarado
  • Publication number: 20140147669
    Abstract: The invention provides adhesives and methods of using the adhesives to bond substrates together, and to articles of manufacture comprising the adhesives. It has been discovered that an adhesive with a polymer content greater than 70 weight percent can be formulated with a blend of (i) a metallocene catalyzed polypropylene polymer that has a density range of about 0.70 to about 0.91 g/cm3 and a melt viscosity less than 50,000 cP at 190° C. and (ii) a Ziegler-Natta catalyzed amorphous polybutene and/or polypropylene copolymer. Such adhesives have high creep resistance making them particularly well suited for disposable personal care garments.
    Type: Application
    Filed: January 31, 2014
    Publication date: May 29, 2014
    Applicant: HENKEL US IP LLC
    Inventors: Jennifer THATCHER, Yuhong HU, Darshak DESAI
  • Publication number: 20130317193
    Abstract: The present invention relates to a process for producing free-flowing, agglomeration resistant amorphous poly-alpha-olefin based adhesive pellets. The process includes (a) extruding the adhesive through an orifice of a die plate immersed in a cooling fluid; (b) cutting the adhesive into a plurality of pellets in the cooling fluid; (c) solidifying the pellets at a temperature range of about 25° C. to about 40° C. for at least 30 minutes; and (d) separating the pellets from the recrystallization fluid and drying the pellets. The pellets harden at least three folds faster than conventionally formed pellets.
    Type: Application
    Filed: March 14, 2013
    Publication date: November 28, 2013
    Applicant: Henkel Corporation
    Inventors: Darshak Desai, Yuhong Hu, Ken Gaspar, Ed Hantwerker
  • Publication number: 20130309427
    Abstract: Propylene polymer based packaging films for encapsulating hot melt adhesives are disclosed. The packaging films are readily miscible with the various hot melt adhesive chemistries during the melting stage without deleteriously affecting the adhesive properties, making the packaging film particularly well suited for packaging hot melt adhesives in a pillow, cylinder, pouch, block, cartridge and like forms.
    Type: Application
    Filed: March 13, 2013
    Publication date: November 21, 2013
    Applicant: Henkel Corporation
    Inventors: Jinyu Chen, Yuhong Hu, Darshak Desai
  • Publication number: 20050042469
    Abstract: A hot melt adhesive based on ethylene-2-ethylhexyl acrylate copolymer finds use in packaging applications where high heat resistance, as well as good cold tolerance, is required.
    Type: Application
    Filed: August 22, 2003
    Publication date: February 24, 2005
    Inventors: Lie-zhong Gong, Melissa Allen, Justin Mehaffy, Darshak Desai, Dale Haner, Tuyet Le