Patent ID: 9499718
Filing Date: 2016-11-22
CPC Classification: B05D,C08G,C09D

Claim Text:
1. A process for the production of an OEM base coat/clear top coat multi-layer coating comprising the steps of: (1) providing a substrate to be provided with an OEM base coat/clear top coat multi-layer coating, (2) spray-applying a waterborne base coat composition on said substrate by electrostatically-assisted high speed rotary atomization to form a base coat layer, (3) spray-applying a clear coat composition on the base coat layer to form a clear top coat layer, and (4) jointly curing the base coat and the clear top coat layers, wherein the waterborne base coat composition comprises water, pigment(s) and resin solids consisting of binder solids and, optionally, crosslinker solids, wherein said binder solids consist of about 20 to about 100 wt. % of an aqueously dispersed polyurethane urea resin with a carboxyl number of about 10 to about 50 mg KOH/g and 0 to about 80 wt. % of other binders, wherein the sum of the wt. % totals 100 wt. %, wherein said aqueously dispersed polyurethane urea resin is made by a process comprising the steps: