	US 12,012,477 B2
	Hybrid polyurethane-polyhydroxyurethane composition
Ya-Mi Chuang, Lanaken (BE); Giulio Martini, Leuven (BE); and Christopher Phanopoulos, Moorsel (BE)
Assigned to Huntsman International LLC
Appl. No. 17/281,766
Filed by Huntsman International LLC, The Woodlands, TX (US)
PCT Filed Sep. 27, 2019, PCT No. PCT/EP2019/076260 § 371(c)(1), (2) Date Mar. 31, 2021, PCT Pub. No. WO2020/070018, PCT Pub. Date Apr. 9, 2020.
Claims priority of application No. 18198612 (EP), filed on Oct. 4, 2018.
Prior Publication US 2021/0395429 A1, Dec. 23, 2021
Int. Cl. C08G 18/10 (2006.01); C08G 18/28 (2006.01); C08G 18/38 (2006.01); C08G 18/48 (2006.01); C08G 18/76 (2006.01)

CPC C08G 18/10 (2013.01) [C08G 18/284 (2013.01); C08G 18/3819 (2013.01); C08G 18/4825 (2013.01); C08G 18/7671 (2013.01)]

17 Claims

1. A method of making a hybrid polyurethane-polyhydroxyurethane (PU-PHU) composition obtained by a process comprising the following steps:

(i) reacting at least one isocyanate containing compound, in stoichiometric excess, with at least one isocyanate-reactive compound, resulting in the formation of at least one prepolymer,

(ii) reacting said at least one prepolymer with at least one cyclic carbonate functional group containing compound, leading to the formation of a cyclic carbonate-terminated prepolymer, wherein the at least one cyclic carbonate functional group containing compound comprises one or more of: 4-(mercaptomethyl)-1,3-dioxolan-2-one, 4-((methylamino)methyl)-1,3-dioxolan-2-one, 4-(aminomethyl)-1,3-dioxolan-2-one, and 2-(2-oxo-1,3-dioxolan-4-yl)acetic acid, and

(iii) performing a ring-opening reaction of said cyclic carbonate-terminated prepolymer with at least one amine functional group containing compound above room temperature resulting in said hybrid PU-PHU composition.