Benzoquinone dye, rope-dyeing dye compositions, cotton rope-dyeing methods using same, and the thus dyed materials
AssigneeMitsui Toatsu Chemicals, Inc.
InventorsHitoshi Koshida, Tetsuo Sakagawa, Takayuki Nakayama, Hiroshi Suwa, Akitoshi Igata, Masao Imai
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Abstract
Denim cotton warp yarns are rope-dyed with a benzoquinone dye of formula (I): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.1 ', R.sub.2 ' and R.sub.3 ' commonly or independently represent a hydrogen atom, a halogen atom, alkyl, cycloalkyl, alkenyl, aryl, aralkyl, alkoxyl or alkoxyalkyl alone or in combination with a red .DELTA..sup.2,3' -biindolin-3,2'-dione dye and/or a blue indigoid dye or sequentially with the latter dye.
Claims18
A rope-dyeing dye composition comprising:
- a) at least one yellow benzoquinone dye represented by formula (I):
- ##STR53## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.1 ', R.sub.2 ' and R.sub.3 ' each commonly or independently represent a hydrogen atom, a halogen atom, alkyl, cycloalkyl, alkenyl, aryl, aralkyl, alkoxyl or alkoxyalkyl;
- and further comprising one or both of
- b) at least one red .DELTA..sup.2,3 '-biindolin-3,2'-dione dye represented by formula (II):
- ##STR54## wherein R.sub.4, R.sub.5, R.sub.6, R.sub.4 ', R.sub.5 , and R.sub.6 ' each commonly or independently represent a hydrogen atom or a halogen atom;
- and
- c) at least one blue indigoid dye represented by formula (III):
- ##STR55## wherein R.sub.7, R.sub.8, R.sub.9, R.sub.7 ', R.sub.8 ' and R.sub.9 ' each commonly or independently represent a hydrogen atom or a halogen atom.
A rope-dyeing process comprising the consecutive steps of:
- a) immersing cotton warp yarns in a rope-dyeing manner, in a dye bath containing at least one blue indigoid dye represented by formula (III):
- ##STR56## wherein R.sub.7, R.sub.8, R.sub.9, R.sub.7 ', R.sub.8 ' and R.sub.9 ' each commonly or independently represent a hydrogen atom or a halogen atom, squeezing the thus-immersed cotton warp yarns, and oxidizing the thus squeezed cotton warp yarns with air;
- b) repeating the immersing, squeezing and oxidizing steps of a) to thereby dye the cotton warp yarns;
- c) immersing the resultant dyed cotton warp yarns in a dye bath containing a rope-dyeing dye composition comprising at least one yellow benzoquinone dye represented by formula (I):
- ##STR57## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.1 ', R.sub.2 ' and R.sub.3 ' each commonly or independently represent a hydrogen atom, a halogen atom, alkyl, cycloalkyl, alkenyl, aryl, aralkyl, alkoxyl or alkoxyalkyl;
- squeezing the thus-immersed cotton warp yarns, and oxidizing the thus-squeezed cotton warp yarns with air, and then repeating the immersing, squeezing and oxidizing steps of c) to thereby dye the cotton warp yarns.
A rope-dyeing process comprising immersing cotton warp yarns in a rope-dyeing manner, in a dye bath containing a rope-dyeing dye comprising at least one yellow benzoquinone dye represented by formula (I):
- ##STR58## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.1 ', R.sub.2 ' and R.sub.3 ' each commonly or independently represent a hydrogen atom, a halogen atom, alkyl, cycloalkyl, alkenyl, aryl, aralkyl, alkoxyl or alkoxyalkyl;
- squeezing the thus-immersed cotton warp yarns, and oxidizing the thus-squeezed cotton warp yarns with air, and then repeating the immersing, squeezing and oxidizing steps to thereby dye the cotton warp yarns.
Dependencies are inferred from the claim text.