Preparation of finely divided styrene-divinylbenzene organic pig

Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal

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106288Q, 106308N, 260 4221, 260327S, 260378, 260395, 260875, 260878R, 260878B, 260880R, 260880B, 526 82, C09B 3130, C09B 4300, C09B 116, C09B 1106

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040174760

ABSTRACT:
Organic pigments for thermoplastic polymers are prepared by the anionic initiated slurry polymerization of styrene and 0.5-15 weight percent divinylbenzene based upon styrene in the presence of a block polymer dispersant, using, as the anionic initiator, an alkali metal-bearing compound at 20.degree. C. to 120.degree. C. to produce a finely divided solid cross-linked polymer and terminating the polymerization by reaction of the polymer particles with an organic dye, an organic dye precursor, or with a reactive coupling agent followed by reaction with an organic dye.

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patent: 3632288 (1972-01-01), Niechwiadowicz et al.
Winnicki et al., Chemical Abstracts vol. 78, No. 72919q (1973).

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