STUDY ON PREPARATION AND APPLICATION OF CATIONIC POLYMER POTENTIATING AGENT FOR PAPER SIZING

The cationic polyacrylic ester emulsion (CPEE) was produced from methyl acrylate, styrene, cationic monomer and other chemicals by means of soap-free polymerization. The optimum condition of preparation was as follows cationic monomer and initiator were 5% and 1% in the total monomer respectively. CPEE, polyaminoamide-epichlorohydrin (PAE) and cationic starch (CS) were used as potentiating agent in the sizing of straw stock. With the help of the above polymers, cationic petroleum resin sizing agent could be used at neutral conditions to produce good sizing effect. Experimental result indicated that CPEE and PAE could apparently improve sizing degree and break length of paper sheet when used together properly. The above two polymers had better potentiation effect on sizing than ordinary retention aids commonly used in papermaking.