PIGMENT & RESIN TECHNOLOGY, vol.41, no.3, pp.163-171, 2012 (SCI-Expanded)
Purpose - The purpose of this paper is to describe how lignosulphonate modified ketone formaldehyde resins containing functional groups such as hydroxyl, carbonyl, phenol, were produced via in situ modification of ketone/formaldehyde resins. Cyclohexanone-formaldehyde (CF-R), acetophenone-formaldehyde (AF-R) and methyl ethyl ketone-formaldehyde (MEKFR) resins were in situ modified with lignosulphonate in the presence of sodium hydroxide. The paper reports the synthesis of lignosulphonate-modified resins with a one step method of in situ modification of ketonic resin. The roles of the types of the ketone, lignosulphonate concentration, the solubility, molecular weight and thermal properties of the product were investigated.