US 11,718,765 B2
Polyurethane coating comprising isosorbide
Nicolas Jacquel, Lambersart (FR); René Saint-Loup, Lomme (FR); Jean-Pierre Pascault, Villeurbanne (FR); Héloïse Blache, Canteleu (FR); Alain Rousseau, Saint-Priest (FR); Françoise Mechin, Lyons (FR); and Etienne Fleury, Soucieu en Jarrest (FR)
Assigned to Roquette Freres, Lestrem (FR)
Appl. No. 16/758,714
Filed by ROQUETTE FRERES, Lestrem (FR)
PCT Filed Oct. 26, 2018, PCT No. PCT/FR2018/052664
§ 371(c)(1), (2) Date Apr. 23, 2020,
PCT Pub. No. WO2019/081867, PCT Pub. Date May 2, 2019.
Claims priority of application No. 17 60155 (FR), filed on Oct. 27, 2017.
Prior Publication US 2020/0339834 A1, Oct. 29, 2020
Int. Cl. C09D 175/08 (2006.01); C08G 18/08 (2006.01); C08G 18/32 (2006.01); C08G 18/48 (2006.01); C08G 18/72 (2006.01); C08G 18/75 (2006.01); C08G 18/79 (2006.01)
CPC C09D 175/08 (2013.01) [C08G 18/0852 (2013.01); C08G 18/3218 (2013.01); C08G 18/4854 (2013.01); C08G 18/725 (2013.01); C08G 18/755 (2013.01); C08G 18/792 (2013.01); C08G 2150/00 (2013.01)] 11 Claims
 
1. A crosslinkable polyurethane coating composition comprising:
a polyol fraction comprising a polyol chosen from a polyester polyol, a polyether polyol, a polycarbonate polyol or a mixture thereof, said polyol being a diol or a mixture of diols;
a polyisocyanate fraction comprising an aliphatic polyisocyanate chosen from a hexamethylene diisocyanate trimer (t-HDI), an isophorone diisocyanate trimer (t-IPDI) or a mixture thereof; and
isosorbide;
in which the polyisocyanate fraction comprises a polyisocyanate with an —NCO functionality strictly greater than 2;
the mole ratio of all the —OH functions of the polyol fraction and of the isosorbide to all of the —NCO functions of the polyisocyanate fraction is between 0.95 and 1.05; and
the mole ratio of all the —OH functions of the polyol fraction to all the —OH functions of the isosorbide is between 0.3 and 1.