The One-bath Dyeing of Polyester and Cotton Fabrics with Novel Naphthalimide-based Disperse Dyes and a Reactive Dye

Gharanjig, K.; Arami, M.; Khosravi, A.; Mahmoodi, N.M.; Mokhtari, J.

The One-bath Dyeing of Polyester and Cotton Fabrics with Novel Naphthalimide-based Disperse Dyes and a Reactive Dye

Authors

¹ Department of Organic Colorants;Center of Excellence for Color science and Technology, Institute for Color Science and Technology

² Textile Engineering Department, Amirkabir University of Technology

³ Department of Polymer Engineering and Color Technology, Amirkabir University of technology

⁴ Department of Environmental Research, Institute for Color Science and Technology

⁵ Department of Textile Engineering, University of Guilan

Abstract

The one-bath dyeing of polyester and cotton fabrics with three disperse dyes based on naphthalimide derivatives and a reactive dye with together were investigated. Two of these disperse dyes have an ester group and one of them has an alkyl group. The disperse dyes containing of ester group and a reactive dye with together enable to dye polyester and cotton fabrics in two stages one-bath method, successfully. These dyes showed that they can be hydrolyzed in alkali media and convert to water soluble compositions. Thus, for removing loose dyed adsorption on the fabric, reduction clearing method was displaced by the alkali-clearing system. Disperse dyes containing ester groups showed that they have excellent wash fastness on the polyester component. Kinetic studies of hydrolysation of the disperse dyes containing ester group in alkali medium showed that the kinetic of the hydrolysation reaction is first order.

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