US 12,065,540 B2
Thiol-containing composition
Allison G. Condie, Valencia, PA (US); Maria S. French, Maidenhead (GB); Masayuki Nakajima, Wexford, PA (US); and Hongying Zhou, Allison Park, PA (US)
Assigned to PPG Industries Ohio, Inc., Cleveland, OH (US)
Appl. No. 17/278,062
Filed by PPG Industries Ohio, Inc., Cleveland, OH (US)
PCT Filed Sep. 20, 2019, PCT No. PCT/US2019/052123
§ 371(c)(1), (2) Date Mar. 19, 2021,
PCT Pub. No. WO2020/061436, PCT Pub. Date Mar. 26, 2020.
Claims priority of provisional application 62/733,816, filed on Sep. 20, 2018.
Prior Publication US 2022/0127448 A1, Apr. 28, 2022
Int. Cl. C08L 63/00 (2006.01); B29C 64/118 (2017.01); B33Y 10/00 (2015.01); B33Y 70/00 (2020.01); C08G 59/06 (2006.01); C08G 59/56 (2006.01); C08G 59/66 (2006.01); C08G 63/664 (2006.01); C08G 63/78 (2006.01); C08L 81/02 (2006.01); C09D 7/63 (2018.01); C09D 163/00 (2006.01); C09D 167/04 (2006.01); C09J 11/06 (2006.01); C09J 163/00 (2006.01); C09J 167/04 (2006.01); G10K 11/162 (2006.01); B29K 63/00 (2006.01)
CPC C08G 63/664 (2013.01) [B33Y 70/00 (2014.12); C08G 59/066 (2013.01); C08G 59/56 (2013.01); C08G 59/66 (2013.01); C08G 63/78 (2013.01); C08L 63/00 (2013.01); C08L 81/02 (2013.01); C09D 7/63 (2018.01); C09D 163/00 (2013.01); C09D 167/04 (2013.01); C09J 11/06 (2013.01); C09J 163/00 (2013.01); C09J 167/04 (2013.01); G10K 11/162 (2013.01); B29C 64/118 (2017.08); B29K 2063/00 (2013.01); B29K 2995/0002 (2013.01); B33Y 10/00 (2014.12); C08L 2205/035 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A composition comprising:
a polythiol curing agent;
a first component comprising an epoxy-containing compound; and
a second component comprising a second curing agent that reacts with the polythiol curing agent in the absence of an external energy source;
wherein the polythiol curing agent may be in the first component and/or the second component;
wherein the epoxy-containing compound has an epoxide equivalent weight of more than 400 g/eq and the polythiol curing agent has a polythiol equivalent weight of no more than 600 g/eq or the epoxy-containing compound has an epoxide equivalent weight of no more than 400 g/eq and the polythiol curing agent has a polythiol equivalent weight of more than 600 g/eq; and
wherein the theoretical maximum crosslink density (XLD) of the epoxy-containing compound and the polythiol curing agent is at least 0.9 mol/kg and no more than 4 mol/kg, calculated according to formula:

OG Complex Work Unit Math
wherein XLD is the theoretical crosslink density, Xi is the weight fraction of polymer I, EW′ is the adjusted equivalent weight calculated according to the equation:

OG Complex Work Unit Math
 where EW is the functional group equivalent weight, and Mw is the weight average molecular weight.