DE906212C - Process for the production of color-fast colors on acetyl cellulose as well as polyamides or polyurethanes - Google Patents

Description

Process for the production of dye-fast dyeings on acetyl cellulose as well as polyamides or polyurethanes of those in men’s and women’s woolen fabrics and wool-rayon blends of the usual colored effect threads made of acetate artificial silk or linear polyamides or polyurethanes will have a high level of overall fastness and in particular a very good fastness to overdyeing is required. The number of blue dyes, which meet these requirements is very low.

It has now been found that blue dyeings with good overall fastness properties and very good over-dyeing fastness are obtained on acetate rayon and on polyamides or polyurethanes if the azo dyes are obtained from diazotized i-amino-4- (2 ', 5'-dimethoxyphenyl-i'-azo ) -naphthalene or i-aminoq.- (2'- methyl - q .'- methoxyphenyl-i'- azo) - naphthalene and i - (2 ', 3'-oxynaphthoylamino) - 2-methoxybenzene, -2-methyl- q.-methoxybenzene or -2, 4.-dimethoxy-5-chlorobenzene, developed on the fiber using the method known as the single bath method. Example ii kg of acetate rayon is treated for 1/2 hours at 75 ° in a bath which contains 150 g of a condensation product of higher molecular weight fatty acids and protein degradation products, 30 ccm of 25% ammonia and 300 g of table salt in 30 l of liquor and in which a hot solution of 9 g of i-amino-q .- (2 ', 5'-dimethoxyphenyl-i'-azo) -naphthalene and 15 g of 1- (2', 3'-oxynaphthoylamino) -2-methy1-q.-methoxybenzene in a mixture of 6 cc sodium hydroxide solution 38 ° Be, 90 g monoethanolamine and 15 cc water was stirred in.

It is rinsed and diazotized for 112 hours at 15 ° in a bath which Contains 30 g sodium nitrite and 150 cc hydrochloric acid 20 ° Be in 30 liters of water.

Then Gor is treated with 12o g sodium acetate in 3o 1 water, soaped with hot water and rinsed. A dark blue of good fastness to washing and dyeing is obtained. Example 2 1 kg of a polyamide fiber is dyed for 1/2 hours at 75 ° in a bath containing 150 g of a condensation product of higher molecular weight fatty acids and protein degradation products, 30 ccm of 25% ammonia, 300 g of sodium chloride and a hot solution of 3 g 1- (2 ', 3'-Oxynäphthoylamino) -2-methoxybenzene and 2 g i-Amino-4- (2', 5'-dimethoxyphenyli'-azo) -naphthalene in a mixture of 0.8 ccm caustic soda 38- Contains B6 and 18 cc of diethanolamine.

One rinses briefly, diazotizes 1/2 hour in the cold in a bath, which contains 60 g sodium nitrite and 225 cc hydrochloric acid 20 'B6 in 30 1 water and treated after about 1/2 hour with a 60 ° hot solution of 12o g sodium acetate in 30 l of water.

Then soap and rinse at around 8o to 85 °. A greenish blue of good fastness to washing, decatur and overstaining is obtained. EXAMPLE 3 i kg of a polyamide fiber is dyed for i 1/2 hours at 75 ° in a bath which is in 30 l liquor i5o g of a condensation product of higher molecular weight fatty acids and protein degradation products, 30 ccm ammonia 25 ° / Qig, 300 g common salt and a hot solution of 15 g of 1- (a ', 3' - oxynaphthoylamino) -2, 4-dimethoxy-5-chlorobenzene and 9 g of i-amino-4- (2 ', 5'-dimethoxyphenyl-i'-azo) -naphthalene in 6 ccm caustic soda 38 ° B6, 50 ccm monoethanolamine and 50 ccm alcohol.

One rinses briefly, diazotizes 1, f, hour in the cold in a bath, which contains 60 g sodium nitrite and 225 ccm hydrochloric acid 20 ° B6 in 30 l water and treated at 6o 'in a solution of 120 g of sodium acetate in 30 l of water. Afterward is soaped hot. A greenish dark blue of good washing, decaturation and color fastness.

In the above examples, 1-amino-4- (2 ', 5'-dimethoxyphenyl-i'-azo) naphthalene is replaced by an appropriate amount of i-amino-4- (2'-methyl-4'-methoxyphenyl-i'-azo) naphthalene and if you proceed as indicated, you will also get blue colorations, which are characterized by good fastness properties.

Claims (1)

PATENT CLAIM: Process for producing dye-fast dyeings on acetyl cellulose as well as polyamides or polyurethanes, characterized in that that the azo dyes from diazotized i-amino-4- (2 ', 5'-dimethoxyphenyl-i'-azo) -naphthalene or i-amino-4- (2'-methyl-4'-methoxyphenyl-i'-azo) -naphthalene and 1- (2 ', 3'-oxynaphthoylamino) -2-methoxybenzene, -2-methyl-4-methoxybenzene or -2, 4-dimethoxy-5-chlorobenzene by known processes developed on the fiber.