	US 12,031,006 B2
	Use of polyolethers for producing porous plastic coatings
Michael Klostermann, Essen (DE); Jan Marian Von Hof, Bochum (DE); Martin Glos, Borken (DE); Christian Eilbracht, Herne (DE); Verena Dahl, Bergisch Gladbach (DE); Oliver Springer, Wesel (DE); and Hans Henning Wenk, Mülheim an der Ruhr (DE)
Assigned to Evonik Operations GmbH, Essen (DE)
Appl. No. 16/632,922
Filed by Evonik Operations GmbH, Essen (DE)
PCT Filed Aug. 2, 2018, PCT No. PCT/EP2018/070948 § 371(c)(1), (2) Date Jan. 22, 2020, PCT Pub. No. WO2019/042696, PCT Pub. Date Mar. 7, 2019.
Claims priority of application No. 17188505 (EP), filed on Aug. 30, 2017.
Prior Publication US 2020/0207938 A1, Jul. 2, 2020
Int. Cl. C08J 9/00 (2006.01); C08G 65/327 (2006.01); C08J 9/30 (2006.01); C09D 175/08 (2006.01)

CPC C08J 9/0038 (2013.01) [C08G 65/327 (2013.01); C08J 9/30 (2013.01); C09D 175/08 (2013.01); C08G 2150/60 (2013.01); C08J 2205/044 (2013.01); C08J 2375/04 (2013.01)]

23 Claims

1. A porous polyurethane coating, obtained by applying an aqueous polyurethane dispersion comprising a polyglycerol ether derivative, to a carrier, wherein the polyglycerol ether derivative is of the general formula 2:

M_aD_bT_c Formula 2

where

M=[C₃H₅(OR″)₂O_1/2]

D=[C₃H₅(OR″)₁O_2/2]

T=[C₃H₅O_3/2]

a=1 to 10,

b=0 to 10,

c=0 to 3,

where the R″ radicals are independently identical or different monovalent aliphatic saturated or unsaturated hydrocarbyl radicals having from 2 to 38 carbon atoms or H, wherein at least one of the R″ radicals is a hydrocarbyl radical;

and

wherein the porous polyurethane coating has a mean cell size less than 150 μm.