Ciba-geigy Corporation

Ciba Specialty Chemicals Corporation

Basf Se Corporation

Joachim Voigt

Thomas Eichenberger

Takashi Deno

Rudolf Buttiker

Rolf Strub

The present invention relates to the field of color filters and LCDs. More specifically, the invention relates to a colorant composition for making color filters comprising pyrimido[5,4-g]pteridine derivatives of formula (I) wherein A1, A2, A3, and A4 are each independently of the others &#x2014;NR1R2, wherein R1 and R2 are each independently of the others hydrogen, CrC8alkyl, &#x2014;CO&#x2014;C1-C8alkyl, &#x2014;CO&#x2014;Ce&#x2014;Cuaryl, &#x2014;COO&#x2014;C1-C8alkyl, &#x2014;COO&#x2014;Ce&#x2014;CMaryl, &#x2014;CONH-d-C&#x3b2;alkyl or &#x2014;CONH&#x2014;Ce-CMaryl, Or A1, A2, A3, and A4 are each independently of the others &#x2014;OH, &#x2014;SH, hydrogen, CrC8alkyl, CrC8alkoxy, or C6-C14aryl or &#x2014;O&#x2014;C6-C14aryl each unsubstituted or mono- or poly-substituted by halogen, nitro, cyano, &#x2014;OR10, &#x2014;SR10, &#x2014;NR10R11, &#x2014;CONR10R11, &#x2014;COOR10, &#x2014;SO2R10, &#x2014;SO2NR10R11, &#x2014;SO3R10, &#x2014;NR11COR10 or by &#x2014;NR11COOR10, wherein R10 and R11 are each independently of the others hydrogen, CrC8alkyl, C5-C12cycloalkyl or C2-C8-alkenyl; and to their use for color filter production and to color filters comprising said pyrimido[5,4-g]pteridine derivatives of formula (I). 

Use of pyrimido[5,4-g]pteridines as shading component in color filter colorant compositions

The apparatus (1) for wet oxidation is pre-assembled with its individual units, namely a high-pressure pump (2), a heat exchanger (3), a reactor (4) for the actual wet oxidation and a compressor (5) for feeding an oxygen/gas mixture, in one or two supporting flames and is accommodated in such a manner that its dimensions and its overall weight allow it to be transported on a road and/or rail vehicle, there advantageously being provided two such supporting flames in the form of standard containers (8 and 9), of which one may contain the reactor (4), divided into individual tube sections (6), and the heat exchanger (3), and the other may contain the remaining units, so that the entire apparatus can be pre-assembled into virtually operational condition and the two containers simply have to be set up, joined together and connected on site. Wet oxidation can thus be carried out even where relatively small quantities of medium are to be purified.

Apparatus for wet oxidation

Growing community of inventors

Efringen-Kirchen, Germany

Joachim Voigt