US 12,331,214 B2
Resistant 2K-PUR coatings
Hans-Josef Laas, Odenthal (DE); Tanja Hebestreit, Wipperfürth (DE); and Yvonne Reimann, Frechen (DE)
Assigned to Covestro Intellectual Property GmbH & Co. KG, Leverkusen (DE)
Appl. No. 17/617,026
Filed by Covestro Intellectual Property GmbH & Co. KG, Leverkusen (DE)
PCT Filed Jun. 26, 2020, PCT No. PCT/EP2020/067983
§ 371(c)(1), (2) Date Dec. 7, 2021,
PCT Pub. No. WO2021/001270, PCT Pub. Date Jan. 7, 2021.
Claims priority of application No. 19184068 (EP), filed on Jul. 3, 2019.
Prior Publication US 2022/0363943 A1, Nov. 17, 2022
Int. Cl. C09D 175/06 (2006.01); C08G 18/28 (2006.01)
CPC C09D 175/06 (2013.01) [C08G 18/289 (2013.01)] 13 Claims
 
1. A coating composition containing
A) at least one polyol component,
B) at least one crosslinker component having free and/or blocked isocyanate groups obtained by reaction of at least one polyisocyanurate based on 1,6-diisocyanatohexane with at least one amino-functional alkoxysilane comprising N-(n-butyl)-3-aminopropyltrimethoxysilane and bis(3-trimethoxysilylpropyl) amine, optionally
C) at least one catalyst for the crosslinking of silane groups, and
D) optionally further auxiliaries and additives,
wherein the polyol component A) comprises at least one polyester polyol A1) prepared using a 2,2,4,4-tetraalkylcyclobutane-1,3-diol (TACD) of the general formula (I)

OG Complex Work Unit Chemistry
in which the radicals R1, R2, R3 and R4 are independently linear or branched alkyl radicals having up to 8 carbon atoms.