Patents Assigned to Hawaii Agriculture Research Center
  • Polymers having enhanced thermal stabilities and methods for their preparation using stabilization agents 1,6,6,-trimethacryloyl 2,3,3,4,4,-penta-o-methylsucrose 1,2,3,3,4,4,6,6,-octa-o-allylsucrose 1,2,3,3,4,4,6,6,-octo-o-crotylsucrose
    Patent number: 5789469
    Abstract: A method for producing stabilized polymers, exhibiting enhanced thermal stability, which comprises polymerizing a mixture comprising: a monomer comprising an allyl-containing group which is bonded to primary and/or secondary hydroxyl groups on a saccharide, preferably a long chain (C.sub.3 -C.sub.20) allyl-containing ether group on the hydroxyl group; and one or monomers selected from methacrylate ester monomers, acrylate ester monomers, acrylamide monomers and styrene monomers, in amounts sufficient to produce a polymer exhibiting enhanced thermal stability. Polymers having enhanced thermal stability are obtained using a monomer comprising an allyl-containing group which is bonded to primary and/or secondary hydroxyl groups on a saccharide, as a novel stabilization crosslinking agent.
    Type: Grant
    Filed: September 4, 1997
    Date of Patent: August 4, 1998
    Assignees: Hawaii Agriculture Research Center, The United States of America as represented by the Department of Agriculture--Agricultural Research Center
    Inventors: Navzer D. Sachinvala, Redford Fu Ju, Morton H. Litt
  • Epoxy monomers from sucrose
    Patent number: 5646226
    Abstract: A method for producing sucrose-based epoxy monomers having one to eight epoxy groups per molecule of sucrose, which comprises reacting a mixture comprising: a sucrose monomer having an allyl-containing group on at least one of the hydroxyl groups, and a reagent or catalyst selected from molybdenum, tungsten, vanadium, titanium and peracid, in the presence of hydrogen peroxide or a derivative thereof, in relative amounts sufficient to produce a sucrose-based epoxy monomer. Monomers thus produced are also provided. The sucrose-based epoxy monomers can be cured to produce a sucrose-based epoxy resin. Such resins are useful, for example, as adhesives, composites and coatings.
    Type: Grant
    Filed: June 6, 1996
    Date of Patent: July 8, 1997
    Assignee: Hawaii Agriculture Research Center
    Inventors: Navzer D. Sachinala, Morton H. Litt
  • Polymers having enhanced thermal stabilities and methods for their preparation using 1',2,3,3',4,4',6,6'-octa-o-allylsucrose
    Patent number: 5621056
    Abstract: A method for producing stabilized polymers, exhibiting enhanced thermal stability, which comprises polymerizing a mixture comprising: a monomer comprising an allyl-containing group which is bonded to primary and/or secondary hydroxyl groups on a saccharide, preferably a long chain (C.sub.3 -C.sub.20) allyl-containing ether group on the hydroxyl group; and one or monomers selected from methacrylate ester monomers, acrylate ester monomers, acrylamide monomers and styrene monomers, in amounts sufficient to produce a polymer exhibiting enhanced thermal stability. Polymers having enhanced thermal stability are obtained using a monomer comprising an allyl-containing group which is bonded to primary and/or secondary hydroxyl groups on a saccharide, as a novel stabilization crosslinking agent.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: April 15, 1997
    Assignee: Hawaii Agriculture Research Center
    Inventors: Navzer D. Sachinvala, Redford F. Ju, Morton H. Litt
  • Polymers having enhanced thermal stabilities and methods for their preparation using 1',6, 6'4,4', 6, 6'-Trimethacryloyl-2, 3, 3', 4, 4'-Penta-O-Methylsucrose
    Patent number: 5614601
    Abstract: A method for producing stabilized polymers, exhibiting enhanced thermal stability, which comprises polymerizing a mixture comprising: a monomer comprising an allyl-containing group which is bonded to primary and/or secondary hydroxyl groups on a saccharide, preferably a long chain (C.sub.3 -C.sub.20) allyl-containing ether group on the hydroxyl group; and one or monomers selected from methacrylate ester monomers, acrylate ester monomers, acrylamide monomers and styrene monomers, in amounts sufficient to produce a polymer exhibiting enhanced thermal stability. Polymers having enhanced thermal stability are obtained using a monomer comprising an allyl-containing group which is bonded to primary and/or secondary hydroxyl groups on a saccharide, as a novel stabilization crosslinking agent.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: March 25, 1997
    Assignee: Hawaii Agriculture Research Center
    Inventors: Navzer D. Sachinvala, Redford F. Ju, Morton H. Litt