Intitulé du mémoire Contribution à la synthèse d’une solutionméthyl-urée : Application à l’apprêtage dtextile

Abstract

The objective of this work was to develop a methyl-urea solution, a mixture of mono, di, tri, and tetra methyl urea, derived from an alkaline methylation synthesis scheme followed by a neutralization step. The obtained solutions exhibited very different characteristics, particularly in relation to dry extract, viscosity, appearance, and their ability to undergo poly-condensation under acidic pH conditions at high temperature, quantified by viscoelasticity analyses. These differences were mainly conditioned by the value of the formaldehyde-urea molar ratio and the dry extract. The application of certain solutions as a sizing Factor on canvas fabric yielded satisfactory results in terms of impermeability.