US 12,168,711 B2
Water-emulsifiable isocyanates with improved properties
Frederic Lucas, Ludwigshafen am Rhein (DE); and Harald Schaefer, Ludwigshafen am Rhein (DE)
Assigned to BASF SE, Ludwigshafen am Rhein (DE)
Appl. No. 17/621,709
Filed by BASF SE, Ludwigshafen am Rhein (DE)
PCT Filed Jun. 18, 2020, PCT No. PCT/EP2020/067000
§ 371(c)(1), (2) Date Dec. 22, 2021,
PCT Pub. No. WO2020/260133, PCT Pub. Date Dec. 30, 2020.
Claims priority of application No. 19182000 (EP), filed on Jun. 24, 2019.
Prior Publication US 2022/0242996 A1, Aug. 4, 2022
Int. Cl. C08G 18/08 (2006.01); C08G 18/10 (2006.01); C08G 18/22 (2006.01); C08G 18/28 (2006.01); C08G 18/48 (2006.01); C08G 18/70 (2006.01); C08G 18/73 (2006.01); C08G 18/76 (2006.01); C08G 18/78 (2006.01); C08G 18/79 (2006.01); C09D 175/08 (2006.01); C09J 175/08 (2006.01)
CPC C08G 18/0866 (2013.01) [C08G 18/10 (2013.01); C08G 18/222 (2013.01); C08G 18/283 (2013.01); C08G 18/4833 (2013.01); C08G 18/706 (2013.01); C08G 18/73 (2013.01); C08G 18/7621 (2013.01); C08G 18/7837 (2013.01); C08G 18/792 (2013.01); C09D 175/08 (2013.01); C09J 175/08 (2013.01); C08G 2150/00 (2013.01); C08G 2170/00 (2013.01)] 15 Claims
 
1. A process for producing a water-emulsifiable polyisocyanate formulation, in which, in a first process step,
(A) a dispersion-active reaction product (E) is prepared from at least one diisocyanate selected from the group of hexamethylene 1,6-diisocyanate, pentamethylene 1,5-diisocyanate, 4,4′-di(isocyanatocyclohexyl)methane, 1-isocyanato-3,3,5-trimethyl-5-(isocyanatomethyl)cyclohexane, tolylene 2,4- and 2,6-diisocyanate, tetramethylxylylene diisocyanate, p-xylylene diisocyanate, 2,4′- and 4,4′-diisocyanatodiphenylmethane, with at least one mono- or polyhydric polyalkylene ether alcohol having 2 to 4 carbon atoms in the alkylene groups that comprises a polymer chain having at least 8 ethylene oxide units, and the resultant reaction product (E), in a second process step,
(B) is mixed with at least one (cyclo)aliphatic polyisocyanate having an average NCO functionality of 2.2 to 5.0,
wherein step (B) is performed in the presence of an allophanatization catalyst and the conditions are chosen such that (E) and the polyisocyanate form allophanate groups, characterized in that the allophanatization catalyst is at least one salt consisting of a metal cation and at least one dithiophosphate anion.