Coatings system with common activator and common volumetric mix ratio

摘要

A multilayer paint system wherein each layer of paint uses the same activator and the same mixing ratio of film-forming binder to activator. The paint system herein is particularly useful for automotive refinishing applications.

主权项

1. A refinish paint system comprising at least two paints;
wherein the first paint comprises a first unactivated film-forming portion comprising a first cross-linkable hydroxyl functionality and an activator comprising an isocyanate cross-linking functionality that when combined in a volumetric mix ratio forms a first coating composition having a stoichiometric ratio of isocyanate functionality to first hydroxyl functionality of about 0.9 to about 1.6; and wherein the second paint comprises a second unactivated film-forming portion comprising a second cross-linkable hydroxyl functionality and the activator comprising the isocyanate cross-linking functionality that when combined in the volumetric mix ratio forms a second coating composition having a stoichiometric ratio of isocyanate functionality to second hydroxyl functionality of about 0.9 to about 1.6, wherein the first and second unactivated film-forming portions are different; and wherein the first and the second paints comprise first and second different paint layers selected from the group consisting of a primer filler layer and a clearcoat layer.