| 摘要 |
The present invention relates to surface-treated pigments of formula (I), wherein Ar<1> and Ar<2> are each independently of the other a phenyl or naphthalene group, n1 and n2 denote a value from 0 to 0.15, the sum of n1 and n2 being a value from 0.01 to 0.15, n is an integer 1 or 2, X<1> is a branched or unbranched alkyl radical or alkenyl radical having from 1 to 25 carbon atoms, it being possible for the alkyl radical to be interrupted by one or more S or O atoms, and is preferably a group -Y-(CH2)m-R<1>, wherein Y is a group -CH2-, -O-, -S-, -C(O)O-, -C(O)-, -C(O)-NH-, -SO2NH- or -SO2- and R<1> is a hydrogen atom or a group -NR<2>R<3>, wherein R<2> and R<3> are each independently of the other a hydrogen atom or a C1-6 alkyl radical, and m is an integer from 1 to 24, especially from 12 to 18, X<2> is a group -COOH, -SO3H or -P(O)OX<3>OX<4>, wherein X<3> and X<4> are each independently of the other a hydrogen atom or a C1-6 alkyl radical, especially a hydrogen atom, and pigment denotes an organic pigment or a mixture of organic pigments, including solid solutions and crystalline solid solutions. Compared with untreated pigments, the surface-treated pigments exhibit better rheological properties and/or no warping in the pigmenting of partially crystalline plastics.
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