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Öğe Oligomeric melamine-formaldehyde resin as pre-tanning agent(2010) Pruneanu M.; Maier S.S.; Maier V.; Deselnicu V.; Mutlu M.M.; Gulumser G.; Bitlisli B.O.; Basaran B.; Zengin A.C.A.This paper presents a novel procedure for the chemical synthesis of a melamine-formaldehyde resin, modified by sulfonation with sulfanilic acid. The product was characterized by chemical analysis, FTIR spectroscopy and gel-permeation chromatography (GPC). Experimental data confirmed the obtaining of three oligomeric fractions of the melamine-formaldehyde polycondensate class, with potential uses as pretanning agent in the manufacture of bovine wetwhite leather. The tanning potential of the obtained resin was assessed through the shrinking temperature of the tanned bovine pelt. An increase of the shrinking temperature by 8-10°C was recorded on the pretanned leather, compared with the pelt, when the resin was used alone, while when used along with resorcine, an increase by 30°C of the shrinking temperature was recorded.
