US 12,187,665 B2
Crosslinking component for binder resins
Michael Herm, Velbert (DE); Frank-Rainer Boehm, Odenthal (DE); and Pascal Meiners, Muenster (DE)
Assigned to AXALTA COATING SYSTEMS IP CO., LLC, Wilmington, DE (US)
Filed by AXALTA COATING SYSTEMS IP CO., LLC, Wilmington, DE (US)
Filed on May 3, 2018, as Appl. No. 15/970,586.
Prior Publication US 2019/0337890 A1, Nov. 7, 2019
Int. Cl. C07C 269/02 (2006.01); B05D 3/02 (2006.01); B05D 7/14 (2006.01); C07C 271/06 (2006.01); C07C 273/18 (2006.01); C07C 275/00 (2006.01); C09D 163/00 (2006.01); C09D 175/04 (2006.01); C08K 5/205 (2006.01); C08K 5/21 (2006.01)
CPC C07C 269/02 (2013.01) [B05D 3/0254 (2013.01); B05D 7/14 (2013.01); C07C 271/06 (2013.01); C07C 273/1854 (2013.01); C07C 275/00 (2013.01); C09D 163/00 (2013.01); C09D 175/04 (2013.01); C08K 5/205 (2013.01); C08K 5/21 (2013.01)] 7 Claims
 
1. A coating composition comprising a crosslinking component comprising at least two blocked isocyanate groups per molecule of the crosslinking component whereby at least one of the at least two blocked isocyanate groups is a group according to the following structural unit (I)

OG Complex Work Unit Chemistry
with
R1 being a C2 to C10 hydrocarbyl group,
wherein
the ratio of structural units of the following formula (II), if present,

OG Complex Work Unit Chemistry
to structural units of formula (I) is 0.20 or below; and
a binder resin comprising epoxy groups, alpha-beta-unsaturated ester groups, (blocked) isocyanates, keto groups, aldehyde groups or mixtures thereof;
where the structural unit (I) forms a free amine by generating a C—C double bond containing compound originating from R1 and CO2 during reaction with the resin.