Jeffrey Pyun

US Patent:

20020106513, Aug 8, 2002

Filed:

Oct 5, 2001

Appl. No.:

09/972046

Inventors:

Kryzysztof Matyjaszewski - Pittsburgh PA, US
Jeffrey Pyun - Pittsburgh PA, US

International Classification:

B32B005/16

US Classification:

428/404000, 428/403000, 428/407000, 526/129000

Abstract:

The present invention describes preparation of nanocomposite particles and structures by polymerizing monomers onto a functional inorganic colloid comprising a polymerization initiation site. The polymerization process is preferably a controlled/living polymerization process, including but not limited to, atom transfer radical polymerization and stable free radical polymerization. The nanocomposite particles can self-organize in solution, on surfaces or in films forming nanocomposite structures. Tethered AB block nanocomposite particles bring size control, solubility control and control over micro- and macro-functionality to the particles. The process may be catalyzed by a transition metal complex which participates in a reversible redox cycle with at least one of the group and a compound having a radically transferable atom or group, to form a nanocomposite particle with a tethered polymer chain. The process may be continued to form tethered copolymer chain. The particle may be silicon based including, for example, silica, silicates and polysilsesquioxane. A nanocomposite structure may be formed by casting, depositing or forming the material including nanocomposite particles.

US Patent:

20090053512, Feb 26, 2009

Filed:

Mar 12, 2007

Appl. No.:

12/282408

Inventors:

Jeffrey Pyun - Tucson AZ, US
Bryan Korth - Tucson AZ, US
Steven Bowles - Pittsburgh PA, US
Pei Yuin Keng - Sarawak, MY

Assignee:

THE ARIZONA BD OF REG ON BEHALF OF THE UNIV OF AZ - Tucson AZ

International Classification:

B32B 15/02
B32B 9/00

US Classification:

428336, 252 6251R, 252 6255, 428368, 428457, 428702, 4284111, 428367

Abstract:

A polymer coated nanoparticle containing a metallic core and a polymer shell encapsulating said metallic core is useful, for example, in magnetic tapes and supercapacitors.

US Patent:

20100279105, Nov 4, 2010

Filed:

Apr 15, 2010

Appl. No.:

12/761210

Inventors:

Jeffrey Pyun - Tucson AZ, US
Bryan Korth - Tucson AZ, US

Assignee:

Arizona Board of Regents on Behalf of The University of Arizona - Tucson AZ

International Classification:

H01F 1/26
B05D 5/00
B32B 5/16

US Classification:

428327, 427130, 427127, 252 6254

Abstract:

The invention relates to polymer coated magnetic particles for magnetic tape storage. The invention also describes methods for making the particles and magnetic tape compositions comprising the coated particles.

US Patent:

20230098612, Mar 30, 2023

Filed:

Feb 4, 2021

Appl. No.:

17/797531

Inventors:

- Tuscon AZ, US
Jeffrey Pyun - Tucson AZ, US
Taeheon Lee - Tucson AZ, US

Assignee:

ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA - Tuscon AZ

International Classification:

C08G 18/64
C08G 18/32
C08G 18/12
C08G 75/16

Abstract:

A composition includes a reaction product of a mixture of elemental sulfur and at least a first ethylenically unsaturated compound comprising a hydroxyl or carboxyl group.