Bleaching and dyeing; fluid treatment and chemical modification – Organic additive for dye composition – dye composition... – Lactam
Patent
1995-07-05
1996-11-05
Einsmann, Margaret
Bleaching and dyeing; fluid treatment and chemical modification
Organic additive for dye composition, dye composition...
Lactam
8565, 8568, 8574, 8584, 8587, 8586, 8614, 8602, 8917, D06P 500, D06P 306, D06P 316, D06P 190
Patent
active
055712916
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a low-temperature dyeing additive for protein fiber products made from wool, silk, etc. and a dyeing method using the same. More specifically, it relates to a low-temperature dyeing additive which is capable of dyeing protein fiber products at a temperature of not more than 90.degree. C. and a dyeing method using the same.
BACKGROUND ART
Heretofore, dyeing of this kinds of protein fiber products is generally carried out in an acidic dyeing bath at a boiling temperature. Thus, various troubles such as yellowing, shrinkage, lowering in strength of protein fiber, and difficulty in color matching due to yellowing, and the like are generated. Accordingly, the conventional protein fiber dyeing technique is not necessarily optimum in view of obtaining protein fiber products with high quality, high added value and low energy cost.
On the other hand, in order to solve these problems, there have been investigated a low-temperature dyeing method comprising an easily dyeing treatment of protein fiber such as an ammonia pre-treatment, an enzyme pre-treatment, a 1-propanol treatment, an alkaline agent treatment, etc.
However, these dyeing method at a low-temperature has not yet been practically used by the reasons as mentioned below. That is, whereas the ammonia pre-treatment has been admitted to as effective for obtaining an easily dyeing effect, various problems related to its volatility and irritating odor have occurred. Also, the oxygen pre-treatment is effective for easy dyeing, but according to the present situation, it requires a high cost, and yet there involves problems that dyeing fastness of the resulting dyed material is likely low and a generation ratio of dyeing unevenness is high. Further, the 1-propanol treatment involves the problem that a uniform effect can be hardly obtained unless a large amount of a treating agent is used. Moreover, the alkaline agent treatment is effective for easy dyeing, but it involves the problem that a uniform effect cannot be obtained since the alkaline agent is too strong in a property as a donor.
An object of the present invention is to provide a low-temperature dyeing additive for protein fiber products, which serves to relax the high-order structures of the protein fibers before dyeing or during dyeing thereby swell the fibers without impairing physical properties thereof.
Another object of the present invention is to provide a method of dyeing protein fiber products with high quality and high dyeing density without impairing physical properties thereof after treating or while treating the protein fibers with the low-temperature dyeing additive.
DISCLOSURE OF THE INVENTION
In order to accomplish the above objects, a low-temperature dyeing additive which is the first embodiment of the present invention comprises a dyeing additive containing one or more solvents which are freely miscible with water and having a donor number within the range of 24 to 50 and an acceptor number within the range of 10 to 24 in the presence or absence of a surfactant, in an amount of 0.025 to 40 g per liter of water, and having a pH of 3.5 to 9.5.
The second low-temperature dyeing additive of the present invention comprises the first dyeing additive and 0.025 to 4.0 g of tributoxyethyl phosphate (hereinafter abbreviated to as "TBXP") per liter of water.
The third low-temperature dyeing additive of the present invention comprises the first dyeing additive and 0.05 to 40 g of at least one kind of anion having an enthalpy of hydration (-.DELTA.H.sub.KJ.multidot.mol.sup.-1) of 200 to 290 per liter of water.
The fourth low-temperature dyeing additive of the present invention comprises the first dyeing additive, 0.025 to 4.0 g of TBXP per liter of water and 0.05 to 40 g of one or more anions having an enthalpy of hydration (-.DELTA.H.sub.KJ.multidot.mol.sup.-1) of 200 to 290 per liter of water.
The present invention will be explained in detail below.
The protein fiber products of the present invention are animal hair fiber such as wool, cashmere, alpaca
REFERENCES:
patent: 4063877 (1977-12-01), Elliot et al.
patent: 4695846 (1987-09-01), Suzuki
patent: 4802887 (1989-02-01), Ateya
patent: 4990186 (1991-02-01), Jones et al.
patent: 5316575 (1994-05-01), Lent et al.
patent: 5435807 (1995-07-01), Kuhn
Einsmann Margaret
Tuyaku Co., Ltd.
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