SYNTHESIS OF ALKYL KETENE MULTIMERS (AKM) AND APPLICATION FOR PRECISION CONVERTING GRADES OF FINE PAPER

摘要

Disclosed is a process for making fine paper that issized under alkaline conditions with a 2-oxetanone sizingagent. The sizing agent is a mixture of alkyl ketene dimerand 2-oxetanone multimers of various molecular weights, atleast 50% by weight of the 2-oxetanone compounds having atleast two 2-oxetanone rings. The paper can be in the form ofcontinuous forms bond paper, adding machine paper, andreprographic paper and can also be converted into envelopes.The paper exhibits levels of sizing comparable to thoseobtained with current alkyl ketene dimer and alkenyl succinicanhydride sizes, and gives improved performance in high speedconverting and reprographic machines.