| 摘要 |
<p>Base coat compositions comprise a film-forming resin component selected from one or a mixture of any of alkyd, polyester, acrylic and polyurethane resins, having blended therewith from 1.0 to 15.0% by weight of pigment and from 2.0% to 50.0% by weight of cellulose ester material having the following chemical characteristics: Solution viscosity, seconds-0.05-0.005 Acetyl, % by wt.-10.0-15.00 Propionyl, % by wt.-0.1-0.8 Butyryl, % by wt.-36.0-40.0 Free-Hydroxyl, % by wt.-1.0-2.0 The compositions when containing pigment such as metallic particles are particularly useful in wet-on-wet automotive finish applications, allowing minimal metallic particle reorientation upon the application thereto of polymeric top coats (particularly those containing solvent), and a considerable increase in solids content.</p> |
