| abstract |
The present invention provides primary hydroxyl enhanced colorants having markedly improved reactivities in e.g., polyurethane foams for imparting permanent coloring thereto, the colorants having the formula C-(Z)1-4 are provided wherein C is an azo, methine, or azamethine chromogen and Z is a poly(oxyalkylene) moiety comprised of (1) at least two (A) units independently selected from those of the formulae -CH2CH(O-T)CH2O- or -CH2CH(O-T)CH2O-T and (2) from none to about 200 (B) units of the formula (-RO-) wherein R is straight or branched chain hydrocarbon of 2-4 carbons, T is a moiety of the formula -CH2CH(R1)-O-(RO)0-40-CH2CH2OH wherein R1 is selected from unsubstituted or substituted alkyl, aryl, alkenyloxyalkyl, alkoxyalkyl or aryloxyalkyl, and wherein the A units comprise at least 0.5 percent of the total A+B units. |