| 摘要 |
Method for preparing a pigment concentrate which is suitable, in particular, for the preparation of a powder coating. The pigment concentrate is prepared by pigment particles being comminuted in the presence of an aqueous binder essentially consisting of a polyester having a glass transition temperature of at least 60 DEG C and an acid value of at least 60, to form a stable paste or suspension, the said paste or suspension formed being subjected to a drying treatment, and the pigment concentrate being collected. The binder used is preferably free of cosolvent, while expediently it is a resin having an acid value of at least 70 DEG C. Preferably, no dispersant is used. By using a pigment concentrate formed according to the present method, a powder coating can be formed which no longer has a tinting strength reserve. |
