Abstract A process for the production of level dyeings on polymeric or copolymeric acrylonitrile fibers by dyeing said fibers with a dye liquor containing a basic dyestuff and as dye assistant a quaternary ammonium compound of the formula WHEREIN R1 represents an aliphatic hydrocarbon radical with at least eight carbon atoms, R2 represents a lower alkyl radical, R3 represents a lower alkyl radical optionally substituted by hydroxyl and/or phenyl groups, R4 represents a lower alkylene bridge and X represents the anion equivalent of an acid such as, e.g., Cl or Br , IS DESCRIBED. The dyeing process is distinguished from those using known strong cationic retarders by its adequate retarding action without any undue blocking effect.
A process as described in claim 1 wherein R4 is -CH2-.
Claim 2
Dependent Claim
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A process as described in claim 1 wherein R1 is alkyl of from eight to 14 carbon atoms.
Claim 3
Dependent Claim
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A process as described in claim 3 wherein R2 is methyl or ethyl.
Claim 4
Dependent Claim
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A process as described in claim 4 wherein R3 is selected from methyl, ethyl, Beta -hydroxyethyl, gamma -hydroxypropyl and Beta -hydroxy- Beta -phenylethyl group.
Claim 5
Dependent Claim
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A process as described in claim 1 wherein in the formula of said compound R1 is alkyl of from eight to 14 carbon atoms, each of R2 and R3 represents methyl or ethyl and X represents chlorine or bromine.
Claim 6
Dependent Claim
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A process as described in claim 1 wherein said compound is N-methyl-N-dodecyl-N- Beta -hydroxy- Beta -phenylethyl-N-2,3-epoxy-propyl-ammonium chloride.
Claim 7
Dependent Claim
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A process as described in claim 6, wherein said compound is N,N-dimethyl-N-dodecyl-N-2,3-epoxypropyl-ammonium chloride.
Claim 8
Dependent Claim
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An acid dye liquor for level dyeing on polymeric or copolymeric acrylonitrile fibers containing at least 85% acrylonitrile, which liquor contains at least one basic dyestuff for coloring said fibers, and as a dye assistant a quaternary compound of the formula as described in claim 1.