NOPR Collection:

Synthesis and dyeing characteristics of 3-amino- 1-arylazo-2- naphthols and 2-amino-1-arylazo-3-naphthols

1990-09-01T00:00:00Z

Title: Synthesis and dyeing characteristics of 3-amino- 1-arylazo-2- naphthols and 2-amino-1-arylazo-3-naphthols Authors: Rangneka, D W; Khanna, S K Abstract: Eight monoazo disperse dyes, 3-amino-1-arylazo-2-napthols and 2-amino-1-arylazo-3-napthols, were prepared by coupling 3-amino-2-napthol with substituted phenyl diazonium salts in alkaline and acidic conditions and their dyeing performance on polyester and polyamide fibres was assessed. The dyeings had red, red brown, red violet and blue violet shades on polyster and red, red brown and red violet shades on polyamide. The dyes showed good pick-up, poor to good light fastness, moderate to good sublimation fastness, poor to moderate perspiration fastness and excellent rubbing fastness. Page(s): 138-140

Sorption studies of modified cotton

1990-09-01T00:00:00Z

Title: Sorption studies of modified cotton Authors: Mehta, S K; Talati, A M Abstract: The sorption behaviour of esterified, formalized and grafted cotton fabrics has been studied; The pick-up of saline solutions by the unmodified and modified cottons has also been evaluated. It is observed that by esterification, formalization and grafting the hydrophilicity of cellulose decreases by crosslinking hydrophilic centres, making them less accessible for sorption of water and salt solution. Page(s): 135-137

Synthesis of 2,6-dialkylamino-5-arylazo-3-cyano-4-methylpyridines and their application on synthetic fibres as disperse dyes

1990-09-01T00:00:00Z

Title: Synthesis of 2,6-dialkylamino-5-arylazo-3-cyano-4-methylpyridines and their application on synthetic fibres as disperse dyes Authors: Rangneka, D W; Kanetkar, V R Abstract: Four monoazo disperse dyes, 2,6-dialkylamino-5-arylazo-3-cyano-4-methylpyridines were prepared and their dyeing performance on polyester and polyamide fibres was assessed. The dyeing had bright yellow shades with excellent pick-up and moderate light fastness on both the fibres and moderate sublimation fastness on polyester fibre. Page(s): 132-134

Synthesis of 2,4,6-trialkylamino-5-arylazopyrimidines and their application on synthetic fibres as disperse dyes

1990-09-01T00:00:00Z

Title: Synthesis of 2,4,6-trialkylamino-5-arylazopyrimidines and their application on synthetic fibres as disperse dyes Authors: Rangnekar, D W; Kanetkar, V R Abstract: Four monoazo disperse dyes, 2,4,6-trialkylamino-5-arylazopyrimidines, were prepared and their dyeing performance on polyester and polyamide fibres was assessed. The dyeings had lemon yellow shades with low pick-up, poor light fastness and moderate sublimation fastness on polyester fibres and good pick-up and light fastness on polyamide fibres. Page(s): 129-131