PROCESS FOR SURFACE SIZING PAPER OR PAPERBOARD

摘要

This invention provides a process for surface sizing paper or paperboard involving applying a surface sizing composition containing a mixture of starch and a surfactantless stable vinyl polymer microemulsion, followed by drying. The vinyl polymer microemulsion is prepared by emulsion polymerization of a styrene or styrene containing organic group with a C2-C8 acrylic or methacrylic ester utilizing as the sole emulsifying agent a low molecular weight alkali soluble, acid containing copolymer.