Patents by Inventor David John St. Clair

David John St. Clair 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: 20120101231
    Abstract: The present invention relates to various end use applications prepared from certain block copolymers. The block copolymers include one or more A or A? blocks or B blocks plus one or more terminal M blocks. Each A and A? is a block or segment comprising predominantly a polymerized alkenyl aromatic compound, each B is a block or segment comprising predominantly a polymerized conjugated alkadiene, and each M is a six membered anhydride ring and/or acid group. The anhydride rings are prepared by thermally decomposing adjacent units of (1-methyl-1-alkyl)alkyl acrylic esters such as t-butylmethylacrylate. A wide variety of polymers are disclosed having the stable anhydride rings in the polymer backbone. The invention relates specifically to various end uses prepared from the reaction product of such block copolymers with various reactive resins, reactive monomers and metal derivatives.
    Type: Application
    Filed: December 28, 2011
    Publication date: April 26, 2012
    Applicant: KRATON POLYMERS U.S. LLC
    Inventors: Richard Gelles, Donn Anthony Dubois, David John St. Clair
  • Publication number: 20100010147
    Abstract: The present invention relates to adhesives and sealants prepared from novel anionic block copolymers of mono alkenyl arenes, diphenylethylenes and conjugated dienes. The block copolymers are unhydrogenated or selectively hydrogenated and have mono alkenyl arene/diphenylethylene end blocks and conjugated diene mid blocks. The block copolymer may be combined with tackifying resins, oils and other components to form the adhesives and sealants of the present invention.
    Type: Application
    Filed: July 8, 2008
    Publication date: January 14, 2010
    Applicant: KRATON Polymer U.S. LLC
    Inventor: David John St. Clair
  • Publication number: 20100010154
    Abstract: The present invention relates to gels prepared from novel anionic block copolymers of mono alkenyl arenes, diphenylethylenes and conjugated dienes, and to blends of such block copolymers with oils. The block copolymers are selectively hydrogenated and have mono alkenyl arene/diphenylethylene end blocks and conjugated diene mid blocks. The block copolymer may be combined with oils and other components to form the gels of the present invention.
    Type: Application
    Filed: July 8, 2008
    Publication date: January 14, 2010
    Applicant: KRATON Polymers U.S. LLC
    Inventor: DAVID JOHN ST. CLAIR
  • Patent number: 7625851
    Abstract: A polymeric viscosity index improver that includes a hydrogenated block copolymer having at least one controlled distribution block copolymer having a minimized crystallinity is provided. An oil composition including at least a base oil and the aforementioned viscosity index improver is also provided. A polymeric concentrate including the aforementioned viscosity index improver is further provided.
    Type: Grant
    Filed: March 7, 2007
    Date of Patent: December 1, 2009
    Assignee: Kraton Polymers US LLC
    Inventor: David John St. Clair
  • Patent number: 7625967
    Abstract: The present invention relates to oil gel compositions that include at least one non-aromatic ester oil and an anionic block copolymer of a mono alkenyl arene and a conjugated diene. The block copolymer is selectively hydrogenated and has mono alkenyl arene end blocks and a controlled distribution block of a mono alkenyl arene and a conjugated diene midblock. The ester oil is a non-aromatic, ester compound such as soybean oil, rapeseed oil, and other like compounds.
    Type: Grant
    Filed: March 7, 2006
    Date of Patent: December 1, 2009
    Assignee: Kraton Polymers U.S. LLC
    Inventor: David John St. Clair
  • Publication number: 20090093584
    Abstract: The present invention relates to various end use applications prepared from certain block copolymers. The block copolymers include one or more A or A? blocks or B blocks plus one or more terminal M blocks. Each A and A? is a block or segment comprising predominantly a polymerized alkenyl aromatic compound, each B is a block or segment comprising predominantly a polymerized conjugated alkadiene, and each M is a six membered anhydride ring and/or acid group. The anhydride rings are prepared by thermally decomposing adjacent units of (1-methyl-1-alkyl)alkyl acrylic esters such as t-butylmethylacrylate. A wide variety of polymers are disclosed having the stable anhydride rings in the polymer backbone. The invention relates specifically to various end uses prepared from the reaction product of such block copolymers with various reactive resins, reactive monomers and metal derivatives.
    Type: Application
    Filed: October 9, 2008
    Publication date: April 9, 2009
    Applicant: KRATON POLYMERS U.S. LLC
    Inventors: Richard Gelles, Donn Anthony Dubois, David John St. Clair
  • Publication number: 20070213241
    Abstract: A polymeric viscosity index improver that includes a hydrogenated block copolymer having at least one controlled distribution block copolymer having a minimized crystallinity is provided. An oil composition including at least a base oil and the aforementioned viscosity index improver is also provided. A polymeric concentrate including the aforementioned viscosity index improver is further provided.
    Type: Application
    Filed: March 7, 2007
    Publication date: September 13, 2007
    Inventor: David John St. Clair
  • Patent number: 7166672
    Abstract: The present invention relates to gels prepared from novel anionic block copolymers of mono alkenyl arenas and conjugated dienes, and to blends of such block copolymers with such polymers. The block copolymers are selectively hydrogenated and have A polymer blocks and B polymer blocks wherein A represents a polymer block of a mono alkenyl arene and B represents a polymer block of a conjugated diene. The block copolymer may be combined with tackifying resins, oils and other components to form the gel of the present invention.
    Type: Grant
    Filed: June 4, 2003
    Date of Patent: January 23, 2007
    Assignee: Kraton Polymers U.S. LLC
    Inventors: Dale Lee Handlin, Jr., Carl Lesley Willis, David John St. Clair
  • Patent number: 7012118
    Abstract: The present invention relates to a photopolymerizable composition, which comprises: (a) a block copolymer component comprising an unhydrogenated styrene diene block copolymer and a hydrogenated controlled distribution styrene diene block copolymer (b) one or more photopolymerizable ethylenically unsaturated low molecular weight compounds, (c) one or more polymerization initiators, and optionally (d) from 0 to 40% by weight, based on the total photopolymerizable compositions, of one or more auxiliaries. The invention also includes flexographic printing plates derived from said photopolymerizable compositions, and flexographic printing relief forms prepared from said plates.
    Type: Grant
    Filed: October 8, 2003
    Date of Patent: March 14, 2006
    Assignee: KRATON Polymers U.S. LLC
    Inventors: David Romme Hansen, David John St. Clair, Donn Anthony Dubois, Dale Lee Handlin, Jr., Carl Lesley Willis
  • Publication number: 20040138371
    Abstract: The present invention relates to gels prepared from novel anionic block copolymers of mono alkenyl arenes and conjugated dienes, and to blends of such block copolymers with other polymers. The block copolymers are selectively hydrogenated and have mono alkenyl arene end blocks and controlled distribution blocks of mono alkenyl arenes and conjugated dienes. The block copolymer may be combined with tackifying resins, oils and other components to form the gels of the present invention.
    Type: Application
    Filed: December 22, 2003
    Publication date: July 15, 2004
    Inventors: David John St. Clair, Dale Lee Handlin, Carl Lesley Willis
  • Publication number: 20040072951
    Abstract: The present invention relates to a photopolymerizable composition, which comprises:
    Type: Application
    Filed: October 8, 2003
    Publication date: April 15, 2004
    Inventors: David Romme Hansen, David John St. Clair, Donn Anthony Dubois, Dale Lee Handlin, Carl Lesley Willis
  • Publication number: 20030225210
    Abstract: The present invention relates to gels prepared from novel anionic block copolymers of mono alkenyl arenes and conjugated dienes, and to blends of such block copolymers with other polymers. The block copolymers are selectively hydrogenated and have mono alkenyl arene end blocks and conjugated diene mid blocks. The block copolymer may be combined with tackifying resins, oils and other components to form the gels of the present invention.
    Type: Application
    Filed: June 4, 2003
    Publication date: December 4, 2003
    Inventors: Dale Lee Handlin, Carl Lesley Willis, David John St. Clair
  • Patent number: 6525142
    Abstract: The invention herein relates to unsaturated monohydroxylated polydiene polymers which are comprised of at least two polymerizable ethenically unsaturated hydrocarbon monomers wherein at least one is a diene monomer which yields unsaturation suitable for epoxidation. The invention also encompasses partially hydrogenated and/or epoxidized derivatives of these novel monohydroxylated polydiene polymers. The preferred monohydroxylated polydiene polymer of the present invention has a structural formula (HO)x—A—Sz—B—(OH)y wherein A and B are polymer blocks which may be homopolymer blocks of conjugated diolefin monomers, copolymer blocks of conjugated diolefin monomers, or copolymer blocks of diolefin monomers and monoalkenyl aromatic hydrocarbon monomers. These polymers may contain up to 60% by weight of at least one vinyl aromatic hydrocarbon, preferably styrene.
    Type: Grant
    Filed: March 7, 1995
    Date of Patent: February 25, 2003
    Assignee: Kraton Polymers U.S. LLC
    Inventors: James Robert Erickson, David John St. Clair, Michael Alan Masse
  • Patent number: 6388010
    Abstract: This invention provides a process for producing a polyurethane resin from a hydrogenated polydiene diol or polyol having a functional group equivalent weight of 750 to 10000, a reinforcing agent having a functional group equivalent weight of 30 to 200, and a polyisocyanate. In a preferred embodiment, the process comprises reacting at least one of a polydiene diol or a reinforcing diol or triol with the polyisocyanate at an NCO/functional group molar ratio of 0.4 to 0.7 or a functional group/NCO molar ratio of 0.25 to 0.55 to form a stable reaction product, adding to this reaction product an additional sufficient amount of the polyisocyanate and, as needed, one or both of the polydiene diol or the reinforcing agent to bring the NCO/functional group ratio up to from 0.9 to 1.1 and to achieve a polydiene diol content of 35 to 80%w (on solids basis) and a reinforcing agent content of 2 to 17%w (on solids basis), and reacting this final mixture to form a crosslinked polyurethane product.
    Type: Grant
    Filed: January 25, 2000
    Date of Patent: May 14, 2002
    Inventor: David John St. Clair
  • Publication number: 20020032286
    Abstract: An epoxidized low viscosity polydiene polymer which has the structural formula
    Type: Application
    Filed: March 29, 2001
    Publication date: March 14, 2002
    Inventors: James Robert Erickson, Michael Alan Masse, David John St.Clair
  • Publication number: 20020013411
    Abstract: A crosslinkable composition comprising from 50 to 98 percent by weight of an epoxidized monohydroxylated polydiene polymer which is comprised of at least two polymerizable ethenically unsaturated hydrocarbon monomers wherein at least one is a diene monomer which yields unsaturation which is suitable for epoxidation, and from 50 to 2 percent by weight of an amino resin.
    Type: Application
    Filed: March 29, 2001
    Publication date: January 31, 2002
    Inventors: David John St. Clair, James Robert Erickson
  • Patent number: 6323299
    Abstract: A process for preparing a thermoplastic polyurethane resin from a polydiene having terminal functional groups selected from the group consisting of hydroxy, amine, and carboxylic acid, at least one polymeric diol selected from the group consisting of polyester polyols, polyether polyols, and polycarbonate polyols, an isocyanate having an average functionality of 2, and a chain extender which comprises: (a) first reacting the polydiene and the isocyanate at 70 to 100° C. for 10 to 60 minutes, (b) adding to the reaction product of (a) the polymeric diol and reacting these components at 70 to 100° C. for 60 to 150 minutes to form a prepolymer, and (c) adding the chain extender and reacting these components at 70 to 125° C. for 1 to 24 hours to form a thermoplastic polyurethane.
    Type: Grant
    Filed: December 1, 1999
    Date of Patent: November 27, 2001
    Assignee: Kraton Polymers U.S. LLC
    Inventors: Dale Lee Handlin, Sudha Mohindra, Michael Alan Masse, David John St. Clair
  • Patent number: 6255364
    Abstract: A crosslinkable waterborne dispersion of an epoxidized polydiene block polymer composition which comprises: (a) 10 to 65% w of a polydiene block polymer containing at least five olefinic epoxy groups per molecule which are sterically hindered, (b) 0.2 to 25% w of a compatible aminoplast, (c) 0.1 to 10% w of a surfactant which is nonionic or anionic and has a volatile cation, and (d) the balance water. The invention also describes a water-continuous process and an inversion processes for making such dispersions.
    Type: Grant
    Filed: February 16, 1995
    Date of Patent: July 3, 2001
    Assignee: Shell Oil Company
    Inventors: David John St. Clair, James Robert Erickson
  • Patent number: 6248810
    Abstract: A crosslinkble waterborne dispersion useful as a coating on metal substrates of an epoxidized polydiene block polymer composition which comprises: (a) 10 to 65% by weight of a polydiene block polymer containing at least five olefinic epoxy groups per molecule which are sterically hindered, (b) 0.2 to 25% by weight of a compatible aminoplast, (c) 0.1 to 10% by weight of a surfactant which is nonionic or anionic and has a volatile cation, and (d) the balance water. A water-continuous process and an inversion process for making a dispersion are also described.
    Type: Grant
    Filed: February 16, 1995
    Date of Patent: June 19, 2001
    Assignee: Shell Oil Company
    Inventors: David John St. Clair, James Robert Erickson
  • Patent number: 6060560
    Abstract: This invention provides a process for producing a polyurethane resin from a hydrogenated polydiene diol or polyol having a functional group equivalent weight of 750 to 10000, a reinforcing agent having a functional group equivalent weight of 30 to 200, and a polyisocyanate. In a preferred embodiment, the process comprises reacting at least one of a polydiene diol or a reinforcing diol or triol with the polyisocyanate at an NCO/functional group molar ratio of 0.4 to 0.7 or a functional group/NCO molar ratio of 0.25 to 0.55 to form a stable reaction product, adding to this reaction product an additional sufficient amount of the polyisocyanate and, as needed, one or both of the polydiene diol or the reinforcing agent to bring the NCO/functional group ratio up to from 0.9 to 1.1 and to achieve a polydiene diol content of 35 to 80% w (on solids basis) and a reinforcing agent content of 2 to 17% w (on solids basis), and reacting this final mixture to form a crosslinked polyurethane product.
    Type: Grant
    Filed: May 6, 1998
    Date of Patent: May 9, 2000
    Assignee: Shell Oil Company
    Inventor: David John St. Clair