Yellow pigments and non-aqueous pigment dispersions

Compositions: coating or plastic – Materials or ingredients – Pigment – filler – or aggregate compositions – e.g. – stone,...

Reexamination Certificate

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C106S031750, C106S031770, C106S031780, C106S493000, C106S496000, C106S498000

Reexamination Certificate

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07637994

ABSTRACT:
A color pigment containing, based upon the total weight of the pigment, at least 70.0 weight % of a first compound COP according to Formula (I):wherein one of R1and R2is hydrogen and the other one of R1and R2represents —COOR4; R4and R5represent methyl; R3is selected from the group consisting of:with C* representing the point of attachment of R3to the nitrogen in Formula (I); and having a pigment surface including between 2.0 and 30.0 weight %, based upon the total weight of the pigment of a second compound according to Formula (I), wherein —R1, R2−, R3, R4and R5have the same meaning as above with the exception that at least one of R4and R5represents hydrogen. Also, methods of preparation of the pigment and non-aqueous pigment dispersions.

REFERENCES:
patent: 3759731 (1973-09-01), Kühne et al.
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patent: 5274010 (1993-12-01), Bugnon et al.
patent: 2008/0207806 (2008-08-01), Jaunky et al.
patent: 2008/0227894 (2008-09-01), Loccufier et al.
patent: 2008/0308004 (2008-12-01), Deroover et al.
patent: 2008/0312358 (2008-12-01), Deroover et al.
patent: 0 957 136 (1999-11-01), None
patent: 1790696 (2007-05-01), None
patent: 1790697 (2007-05-01), None
patent: 2 356 634 (2001-05-01), None
patent: 2 356 866 (2001-06-01), None
Official communication issued in the International Application No. PCT/EP2006/069021, mailed on Oct. 10, 2007.

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