Torkelson Research Group

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John Torkelson

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Awarded Patents

2021

Methods for enhancing the bonding strength of thermoset adhesives and sealants via disulfide dynamic chemistry
JM Torkelson, L Li, X Chen
US Patent App. 16/911,943

2020

Dynamic polyurethane networks with post-recycling retention of cross-linking densities and mechanical properties
JM Torkelson, X Chen, S Hu, L Li
US Patent App. 62/991,148

Methods for making recyclable and depolymerizable polymer network materials via thiourethane dynamic chemistry
JM Torkelson, L Li, X Chen
US Patent App. 16/913,635

Reprocessable cross-linked network polymers with alkoxyamine dynamic covalent bonds
JM Torkelson, K Jin, L Li
US Patent 10,618,991

2019

Enhancing the physical properties of semi-crystalline polymers via solid state shear pulverization
JM Torkelson, C Pierre, AF Walker, PJ Brunner
US Patent 10,414,878

2018

Colorant dispersion in polymer materials using solid-state shear pulverization
JM Torkelson, PJ Brunner
US Patent 10,093,035

Direct use of natural antioxidant-rich agro-wastes as thermal stabilizers for polymers
JM Torkelson, KA Iyer
US Patent 9,938,397

Enhancing the physical properties of semi-crystalline polymers via solid-state shear pulverization
JM Torkelson, C Pierre, AF Walker
US Patent 9,926,412

Enhancing the physical properties of semi-crystalline polymers via solid state shear pulverization
JM Torkelson, C Pierre, AF Walker, PJ Brunner
US Patent 9,873,770

2017

Peroxy-derivative functionalization of polypropylene via solid-state shear pulverization
JM Torkelson, JM Diop
US Patent 9,695,255

Maleic anhydride functionalization of polypropylene via solid-state shear pulverization
JM Torkelson, JM Diop
US Patent 9,624,320

2016

Peroxy-derivative functionalization of polypropylene via solid-state shear pulverization
JM Torkelson, JM Diop
US Patent 9,695,256

Catalyst for non-isocyanate based polyurethane
V Lombardo, K Scheidt, E Leitsch, J Torkelson, E Dhulst, WH Heath, N Wilmot
US Patent 9,260,564

2015

Enhancing the physical properties of semi-crystalline polymers via solid-state shear pulverization
JM Torkelson, C Pierre, A Flores
US Patent 9,133,311

Solid-state shear pulverization/melt-mixing methods and related polymer-carbon nanotube composites
JM Torkelson, J Masuda
US Patent 8,961,846

2014

Polymer-graphite nanocomposites via solid-state shear pulverization
JM Torkelson, K Wakabayashi
US Patent 8,734,696

Enhancing the physical properties of semi-crystalline polymers via solid-state shear pulverization
JM Torkelson, C Pierre, A Flores
US Patent 8,729,223

2013

Solid-state shear pulverization/melt-mixing methods and related polymer-carbon nanotube composites
JM Torkelson, J Masuda
US Patent 8,597,557

Enhancing the physical properties of semi-crystalline polymers via solid-state shear pulverization
JM Torkelson, C Pierre, A Flores
US Patent 8,410,245

2012

Polymer-graphite nanocomposites via solid-state shear pulverization
JM Torkelson, K Wakabayashi
US Patent 8,303,876

2011

Polymer-graphite nanocomposites via solid-state shear pulverization
JM Torkelson, K Wakabayashi
US Patent 7,906,053

2007

Method of producing an exfoliated polymer-clay nanocomposite through solid-state shear pulverization
JM Torkelson, A Lebovitz, K Kasimatis, K Khait
US Patent 7,223,359

2002

Processes of mixing, compatibilizing, and/or recycling blends of polymer materials through solid state shear pulverization, and products by such processes
N Furgiuele, JM Torkelson, K Khait
US Patent 6,479,003

Active Patent Applications

2017

Reprocessable Cross-linked Network Polymers with Alkoxyamine Dynamic Covalent Bonds
JM Torkelson, K Jin, L Li
US Patent 15/274,619

2015

Method for processing polymers and/or polymer blends from virgin and/or recycled materials via solid-state/melt extrusion
PJ Brunner, JM Torkelson, W Wakabayashi
US Patent 14/179,941

2014

Enhanced degradation of polymeric materials via solid-state shear pulverization
PJ Brunner, JM Torkelson
US Patent 14/206,291