	US 12,104,008 B2
	Solid-solid phase-change materials
Zhenhua Cui, Glenview, IL (US); Warren A. Kaplan, Libertyville, IL (US); and Sarah Wolek, Arlington Heights, IL (US)
Assigned to STEPAN COMPANY, Northfield, IL (US)
Filed by STEPAN COMPANY, Northfield, IL (US)
Filed on Aug. 14, 2020, as Appl. No. 16/994,220.
Application 16/994,220 is a continuation of application No. PCT/US2019/018688, filed on Feb. 20, 2019.
Claims priority of provisional application 62/634,396, filed on Feb. 23, 2018.
Prior Publication US 2020/0377646 A1, Dec. 3, 2020
Int. Cl. C08G 59/06 (2006.01); C08G 18/42 (2006.01); C08G 18/48 (2006.01); C08G 59/14 (2006.01); C08G 63/06 (2006.01); C08G 65/331 (2006.01); C08G 65/34 (2006.01); C08J 9/00 (2006.01); C09K 5/14 (2006.01)

CPC C08G 59/063 (2013.01) [C08G 18/4294 (2013.01); C08G 18/4895 (2013.01); C08G 59/14 (2013.01); C08G 63/06 (2013.01); C08G 65/331 (2013.01); C08G 65/34 (2013.01); C08J 9/0009 (2013.01); C09K 5/14 (2013.01); C08G 2110/0008 (2021.01); C08G 2110/0025 (2021.01); C08G 2115/02 (2021.01); C08J 2205/10 (2013.01); C08J 2375/06 (2013.01); C08J 2375/08 (2013.01); Y02E 60/14 (2013.01)]

18 Claims

1. A polyether- or polyester-epoxide polymer (PEEP) composition which comprises a reaction product of:

(a) a polyepoxide compound having an equivalent weight within the range of 115 to 250 g/eq.; and

(b) a polyol composition comprising a polyether polyol, a polyester polyol, or a mixture thereof, wherein the polyol composition has a melting point within the range of 20° C. to 100° C. and a hydroxyl number less than 35 mg KOH/g;

wherein the ratio of epoxy equivalents of the polyepoxide compound to hydroxyl equivalents of the polyol composition is within the range of 2:1 to 6:1; and

wherein the PEEP composition is a solid-solid phase-change material having, as measured by differential scanning calorimetry (DSC) at a heating/cooling rate of 10° C./minute, a transition temperature within the range of 15° C. to 50° C., a latent heat at the transition temperature within the range of 30 to 200 J/g, and little or no detectable hysteresis or supercooling upon thermal cycling over at least five heating/cooling cycles that encompass the transition temperature wherein the little or no detectable hysteresis or supercooling is evidenced by a variation in transition temperature in any heating or cooling transition of less than 2° C. over the at least five cycles.