C - Chemistry – Metallurgy – 09 – B
Patent
C - Chemistry, Metallurgy
09
B
260/175.2
C09B 44/02 (2006.01) C09B 67/26 (2006.01)
Patent
CA 1274506
ABSTRACT The present invention is a process for the preparation of concentrated anionic red dye solutions which are storage stable. The process allows manufacture of a solution of a dye having the formula: Image wherein R1 is -SO2N(CH2CH2CH2 CH3)2, -SO2N(C6H5) (CH2CH3), -SO2N(CH3) (C6 H11 ), or -CF3; R2 is -H, -Cl or -NH?R3 and R3 is lower alkyl M is Image wherein R4 and R5 are -H or -CH3 independently and m + n + q ?-9, but > 0, by reacting a dye having the structure: Image wherein R, is -SO2N(CH2CH2CH2CH3)2, -SO2N(C6H5) (CH2CH3), -SO2N(CH3)(C6H11 ), or -CF3 : R2 is -H, -Cl or Image wherein R3 is lower alkyl, and X is NH(R6)3, wherein R6 is H or a lower alkyl, in a mixture of water and a water soluble organic solvent with a polyhydroxyalkoxyalk ylamine haying the structure: Image under conditions which cause expulsion of the volatile amine N(R6)3 .
527134
Crompton & Knowles Corporation
Ridout & Maybee Llp
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