The present invention refers to a mixing scheme containing a plurality of pigmented base paint compositions having defined colors and optionally one or more non-pigmented base paint compositions comprising at least one rheology controlled base paint composition containing at least one pigment selected from the group consisting of inorganic pigments, di-keto-pyrrolo-pyrrole type pigments, organic liquid crystal type pigments and carbon black and having the following rheology profile
(1) an initial viscosity V1 at 20 °C of 65 Pa s or greater when measured at a shear rate of 10-3 s-1,
(2) a viscosity V2 at 20 °C when measured at a shear rate of 10-3 s-1 immediately after subjecting to a shear rate of at least 15 s-1 whereby the viscosity V2 is 700 Pa s or less and is less than or equal to 70 % of V1;
(3) 24 hours after subjected by shaking to a shear rate of at least 15s-1 a viscosity V3 at 20 °C of at least 140 % of V2 and be at least 55 Pa s,
to a process of preparing a refinish coating composition using the mixing scheme of the present invention, to a refinish coating compositions obtainable therefrom, to a process of coating a substrate using the refinish coating composition and to a coated substrate obtainable therefrom.
本发明是指一种混合方案,其中包含多种具有确定颜色的着色基底涂料组合物,以及一种或多种非着色基底涂料组合物,该组合物包含至少一种流变控制基底涂料组合物,该组合物含有至少一种
颜料,这些
颜料选自无机
颜料、二酮基
吡咯-
吡咯型
颜料、有机液晶型
颜料和
炭黑组成的组,并具有以下流变曲线
(1) 在 10-3 s-1 的剪切速率下测量,20 °C 时的初始粘度 V1 为 65 Pa s 或更高、
(2) 在 20 °C 时,以 10-3 s-1 的剪切速率测量粘度 V2,紧接着经受至少 15 s-1 的剪切速率,其中粘度 V2 为 700 Pa s 或以下,且小于或等于 V1 的 70%;
(3) 在振荡 24 小时后,以至少 15 秒-1 的剪切速率使 V3 在 20 °C 时的粘度至少为 V2 的 140%,且至少为 55 Pa s、
使用本发明的混合方案制备修补涂层组合物的工艺、由此获得的修补涂层组合物、使用修补涂层组合物涂覆基材的工艺以及由此获得的涂覆基材。