Method for producing colorant excellent in color development

C - Chemistry – Metallurgy – 09 – B

Patent

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Details

C09B 67/00 (2006.01) C09B 67/10 (2006.01) C09B 67/54 (2006.01) C09C 3/04 (2006.01) C09C 3/10 (2006.01)

Patent

CA 2451796

There is provided a method for producing colorants which can exhibit excellent color development even in a small amount and are low in thixotropy. The constituent feature of the present invention comprises: enhancing the molecular extinction coefficient of the coloring matter substance by ion exchanging method, to afford a room for increasing B (resin) of P/B; then a composition is designed and employed to enhance the effect increasing the polar group concentration which is a role of resin and the quality of the effect; it thus becomes possible to achieve the limit value of the molecular extinction coefficient as much as possible and to eliminate the factors adversely affecting the present process.

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