Polyester fibers dyed with methylidynebis pyrazolone dyestuffs

Abstract

Abstract WHEREIN EACH OF R1, R2 and R3 is independently hydrogen, lower alkyl, chloro, bromo or lower alkoxy; ONE Y is hydrogen and the other Y is D R A W I N G GROUP FORM A HETEROCYCLIC GROUP HAVING FIVE OR SIX RING ATOMS. EACH R4 is independently lower alkyl, chloro(lower alkyl), bromo(lower alkyl), cyano(lower alkyl), phenyl, chlorophenyl, bromophenyl, lower alkylphenyl, cyano(lower alkyl)phenyl, nitrophenyl, sulfamylphenyl, N,N-di(lower alkyl)sulfamylphenyl, N-(lower alkyl)sulfamylphenyl, lower alkylsulfonylphenyl, cyanophenyl, di(lower alkyl) carbamylphenyl or lower alkoxyphenyl; or THE TWO R4 groups taken together with the adjacent Dyestuffs for polyester and plastic substrates are provided by reacting a methylidynebis pyrazolone with an N-methylolamide. The dyestuffs have the formula

Inventors

• 👤 E Renfrew

Bibliographic Details