| 摘要 |
A process for preparing a perylene pigment composition comprising: (A) reacting (1) a perylene tetracarboxylic acid compound of formula (I), (2) about 0.1 to about 25 mol % (preferably 0.5 to 10 mol %), relative to the pigment composition of the a perylene compound of formula (II), (3) an alkylating agent of the formula (V) R1-X or (VI) R1-Y-R1, (4) optionally, a solvent; wherein R, A, m, W, R1, X, Y have the meaning given in claim 1, thereby forming a reactive co-precipitated perylene pigment composition; and (B) isolating the perylene pigment composition.
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