Abstract: The C—H bond of pendant aromatic groups such as commercial polystyrenes with three types of tacticities (syndiotactic, isotactic, atactic) undergo catalyzed functionalization with boron reagents. A boronic ester group formed on the polymer in the polystyrene was further converted to hydroxy and arene via oxidation and coupling reactions, respectively. These functionalizations proceeded without significantly affecting the molecular weight of starting polymer and the functional concentrations could be easily controlled by changing the ratio of boron reagent to monomer unit.
Type:
Grant
Filed:
April 2, 2008
Date of Patent:
March 2, 2010
Assignee:
Board of Regents of the Nevada System of Higher Education on Behalf of the University of Nevada, Las Vegas
Abstract: A thermoset and method of making such by crosslinking a mixture of a polyhedral oligomeric silsesquioxane having pendent siloxane groups or unsaturated carbon bonds and a siloxylcarborane compound having unsaturated carbon bonds.
Type:
Grant
Filed:
August 7, 2007
Date of Patent:
February 2, 2010
Assignee:
The United States of America as represented by the Secretary of the Navy
Abstract: The present invention is directed to a rheology control agent for coating compositions. The rheology control agent includes a compound having the Formula (I) including isomers or mixtures of isomers thereof: wherein p is 0, 1, 2, or 3; and R2, R3, R4, X and Y groups are described in the specification. The solvent-borne coating compositions containing the rheology control agent have improved rheology control on application and are useful for OEM, refinishing or repainting the exterior of automobile and truck bodies and parts thereof.
Type:
Grant
Filed:
January 12, 2006
Date of Patent:
December 15, 2009
Assignee:
E.I. du Pont de Nemours and Company
Inventors:
Christian Peter Lenges, Yanhui Niu, Yu-Ling Hsiao, Jiang Ding, Robert John Barsotti, Renee J. Kelly, Robert James Butera, Young H. Kim
Abstract: A transparent composite article comprising a polyurethane matrix and incorporated within the matrix nanofibers having a diameter up to 5000 nanometers.
Type:
Grant
Filed:
December 14, 2006
Date of Patent:
December 15, 2009
Assignee:
PPG Industries Ohio, Inc.
Inventors:
Stuart D. Hellring, Kaliappa G. Ragunathan, Thomas G. Rakavina, Victoria A. Trette
Abstract: A composite material containing a thermoplastic material and a non-functional aromatic end group-containing polymer is disclosed. Also disclosed are methods of making and use the composite materials.
Type:
Grant
Filed:
September 17, 2007
Date of Patent:
November 3, 2009
Assignee:
Rohm and Haas Company
Inventors:
Bahar Azimipour, Chuen-Shyong Chou, Edward E. LaFleur, Nazir Ahmed Memon
Abstract: Fluorinated comb co-polymers have a main chain including a semi-rigid hydrophobic fluorinated poly(ether) backbone and comb segments in the form of flexible and monodisperse side chains that are more hydrophilic than the backbone. The side chains may be hydrophilic polymeric chains obtained from “living-type” polymerization, for example polymethacrylates, polyethylene oxides, polystyrenes. Hydrophilic functionality, for example, ionic groups may be selectively introduced onto the side chain post polymerization. The side chain may be sulfonated ?-methyl polystyrene. Such polymers are useful in proton exchange membranes.
Type:
Grant
Filed:
May 26, 2006
Date of Patent:
June 2, 2009
Assignee:
National Research Council of Canada
Inventors:
Tyler B. Norsten, Jianfu Ding, Michael D. Guiver, Yinghua Qi
Abstract: A method of preparing a polymer involving reacting at least one backbone carbamate (and/or optional urea) nitrogen of a thermoplastic polymer with a modification agent to form a modified polymer.
Type:
Grant
Filed:
March 24, 2006
Date of Patent:
May 26, 2009
Assignee:
Medtronic, Inc.
Inventors:
Deon Bezuidenhout, Jacobus P. Theron, Lawrence J. Higham, Peter P. Zilla
Abstract: Polyurethane-based pressure-sensitive adhesive, characterized in that the polyurethane is composed of the following starting materials which are reacted catalytically with one another in the stated proportions: a) at least one aliphatic or alicyclic polyisocyanate having a functionality of in each case less than or equal to three, b) a combination of at least one triol A based on polypropylene glycol and having an average number-averaged molecular weight Mn of less than or equal to 1000 and a triol B based on polypropylene glycol and having an average number-averaged molecular weight Mn of greater than or equal to 1000, preferably greater than or equal to 3000, the ratio of the number of hydroxyl groups of the triol component A to the number of hydroxyl groups of the triol component B being between greater than 0 and 12, the ratio of the number of isocyanate groups to the total number of hydroxyl groups being between 0.8 and 1.15, preferably between 0.95 and 1.
Type:
Grant
Filed:
June 23, 2006
Date of Patent:
February 24, 2009
Assignee:
tesa AG
Inventors:
Uwe Schümann, Kirstin Weiland, Philippe Hesse