C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 11/06 (2006.01) C08J 3/20 (2006.01) C08K 5/00 (2006.01) C08K 5/3415 (2006.01) C08L 67/00 (2006.01) C08L 77/00 (2006.01) C09B 67/02 (2006.01) C09B 67/20 (2006.01) C09D 11/00 (2006.01) C09K 11/02 (2006.01)
Patent
CA 2081954
TH/P-1882/A/SNC Abstract Process for the manufacture of pigments, especially fluorescent pigments A process for the manufacture of pigments comprising a coloured composition incorporated in a poly condensation resin said resin not containing aldehyde derivatives, especially formaldehyde derivatives, wherein the reactants for the formation of said polycondensation resin and the coloured composition are introduced continuously into a reactor and are mixed, the mixture travels forward in the reactor and at the end of reaction the product is withdrawn continuously from the said reactor. The process is particularly suitable for the preparation of fluorescent pigments. The reactor used is preferably an extruder. Also claimed are compositions comprising diketo-pyrrolo-pyrrole colourants and certain polyester or polyamide resins as well as a process for the preparation of said compositions. (Fig.1)
Marcq Michel Jean
Tanner Martin
Ciba Specialty Chemicals Holding Inc.
Fetherstonhaugh & Co.
Societe Nouvelle de Chimie Industrielle Sa
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