US 11,718,766 B2
Self-repairing polyurethane networks
Marek W. Urban, Clemson, SC (US); and Ying Yang, Clemson, SC (US)
Assigned to Clemson University, Clemson, SC (US)
Filed by Clemson University, Clemson, SC (US)
Filed on Nov. 9, 2020, as Appl. No. 17/93,045.
Application 17/093,045 is a division of application No. 16/045,448, filed on Jul. 25, 2018, abandoned.
Application 16/045,448 is a division of application No. 15/037,214, granted, now 10,077,378, previously published as PCT/US2014/049961, filed on Aug. 6, 2014.
Claims priority of provisional application 61/905,574, filed on Nov. 18, 2013.
Prior Publication US 2021/0062036 A1, Mar. 4, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C08G 18/64 (2006.01); C09D 175/08 (2006.01); C08B 11/02 (2006.01); C08B 37/00 (2006.01); C08B 37/08 (2006.01); C08G 18/48 (2006.01); C09D 175/04 (2006.01); C08G 18/32 (2006.01); C08G 18/40 (2006.01); C08G 18/24 (2006.01); C08G 18/72 (2006.01); C09D 5/00 (2006.01)
CPC C09D 175/08 (2013.01) [C08B 11/02 (2013.01); C08B 37/00 (2013.01); C08B 37/003 (2013.01); C08B 37/0045 (2013.01); C08B 37/0075 (2013.01); C08G 18/242 (2013.01); C08G 18/3215 (2013.01); C08G 18/4081 (2013.01); C08G 18/4833 (2013.01); C08G 18/6484 (2013.01); C08G 18/72 (2013.01); C09D 5/00 (2013.01); C09D 175/04 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An alkyl substituted chitosan polyurethane composition comprising a reaction product of
a) a polyol comprising two or more hydroxy groups per compound or a polythiol comprising two or more thiol groups per compound;
b) an isocyanate;
c) an alkyl substituted chitosan composition comprising:

OG Complex Work Unit Chemistry
wherein CHI is a chitosan compound, ALK is C1-C20 alkyl, and p and n each independently range from about 5 to about 650; and
d) optionally an organotin compound.