Sharma A.,Thapar Center for Industrial Research Development |
Upadhyay J.S.,Thapar Center for Industrial Research Development |
Chakrabarti S.K.,Thapar Center for Industrial Research Development
Paper Technology | Year: 2011
The purpose of paper sizing is to provide hydrophobicity to the paper. Alkenyl succinic anhydride (ASA) sizing finds wide application in paper industries around the world. ASA is a fast curing size though hydrolysis of ASA molecules is a disadvantage. Cationic starch is the most commonly used protective colloid for making ASA emulsion. The present study deals with the emulsification of ASA with synthetic polyacrylamide macromolecules. It was found that the coverage of the ASA droplets with the continuous layer of medium and medium to high molecular weight polyacrylamides gives better colloidal stability and sizing performance. Emulsion stability is achieved with low dosage of acrylamide polymer.