Acid dyeable polyester containing 1,8-bis-(dialkyl-amino)naphtha

Details Acid dyeable polyester containing 1,8-bis-(dialkyl-amino)naphtha Acid dyeable polyester containing 1,8-bis-(dialkyl-amino)naphtha

1975-03-06

1977-06-14

Phynes, Lucille M.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 459R, C08G 6376, C08G 6302

Patent

active

040296377

ABSTRACT:
A filament-forming polyester or copolyester and fibers thereof composed of at least 80% of ethylene terephthalate units containing a tertiary amine as an additive to improve the receptivity for acid dyes. The invention provides novel additives comprising 1,8-diamino-naphthalenes in which the two amino groups have four alkyl substituents with 1-4 carbon atoms and the nucleus may have H, alkyl or aralkyl substituents. The preferred additive is N,N,N',N'-tetramethyl-1,8-diamino-naphthalene. A preferred copolyester contains 1-10% ethylene azelate units. The novel additives improve the exhaustion of the dye bath and the wash fastness of the dyed filaments.

REFERENCES:
patent: 2812313 (1957-11-01), Nischk et al.
patent: 2945010 (1960-07-01), Caldwell et al.
patent: 3551381 (1970-12-01), Stewart et al.

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