Method for the emulsification of ASA with polyamidoamine epihalohydrin (PAE)

摘要

The invention is directed towards methods and compositions for improving the sizing of paper using PAE. Proper sizing of paper requires that a sizing agent adequately disperse so as to evenly distribute on the paper. Proper sizing also requires that the agent not cause runnability or chemical problems with other materials or equipment used in the papermaking process. PAE displays unexpected attributes that allow it to disperse sizing agents. Best of all it is not subject to the same overdose effect of typical emulsifiers such as cationic starch. As a result PAE is an excellent option for use in sizing paper.

主权项

1. A method of preparing sized paper products, the method comprising the step: of adding PAE and a sizing agent to a thin stock paper sheet furnish during the wet-end of a papermaking process prior to the dewatering stage of the papermaking process, wherein the PAP is in an amount sufficient to emulsify the sizing agent and the ratio of PAE to the sizing agent is more than 2.5:1, and wherein the PAE is fed into the paper sheet furnish by at least two distinct feed streams, one feed stream comprises PAE and excludes a sizing agent, the other comprises PAE combined with a sizing agent.