United States Patent (19) 11 4,229,178 Lazar Et Al
United States Patent (19) 11 4,229,178 Lazar et al. 45) Oct. 21, 1980 DYE COMPOSITIONS 3,625,011 12/1975 Boehmke ................................. 8/173 54 3,700,405 10/1972 Petite et al. .............................. 8/173 75 Inventors: Remus I. Lazar, Berwyn; Richard C. Reichel, Chicago, both of Ill. Primary Examiner-Joseph L. Schofer Assistant Examiner-Maria S. Tungol 73) Assignee: Welsicol Chemical Corporation, Attorney, Agent, or Firm-Dietmar Olesch; Robert J. Chicago, Ill. Schwarz 21 Appl. No.: 912,170 57 ABSTRACT 22 Filed: Jun. 5, 1978 This invention discloses compositions and methods for 51) Int. Cl......................... D06P 1/651; D06P 3/84; dyeing natural proteinaceous and synthetic polyamide D06P 1/16 fibers, particularly wool, silk and nylons, utilizing dye 52 U.S. C. ............................................ 8/583; 8/597 assistants effective both with acid and disperse dyes, 58) Field of Search ...................... 8/92, 173, 54, 21 B such assistants being combinations of a mixture of lower 56 References Cited esters of chlorinated benzoic acids with a mixture of U.S. PATENT DOCUMENTS lower alkyl esters of toluic and benzoic acids. 2,881,045 4/1959 Mecco et al. ............................ 8/173 3,203,753 8/1965 Sherburne .................................. 8/93 5 Claims, No Drawings 4,229, 178 2 venience such mixture will hereinafter be referred to as DYE CCA P50STCFS “MPTB'. Both MCB and MPTB have been recommended for BACKGROUND OF THE INVENTION use as dye assistants for the disperse dyeing of polyester 1. Field of the Invention fibers. When tested, in the dyeing system described in This invention relates to the dyeing of natural pro Example I, as assistants for both acid and disperse dye teinaceous and synthetic polyamide fibers, particularly ing of certain specialty nylons comprised of 40% or the normal and specialty nylons.
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