STRUCTURED LATEX PARTICLES WHICH ARE FILM FORMING AND A PROCESS FOR THEIR PREPARATION

摘要

A process for preparing structured latex particles having a core and shell region wherein said latex particles are film forming at room temperature by adjusting the feed rates of the shell monomer feeds such that as the weight fraction of the shell increases the feed rate of an acrylate and/or monovinyl monomer or extended core monomer feed of monovinyl aromatic monomer is decreased whereby a shell region encapsulates the core region are described. Structured latex particles prepared by the process are also described. Films of the subject structured latex particle where the shell monomer feed is methylmethacrylate or similar high Tg monomer have good film strength, Further, films of the subject structured latex where the shell monomer feed is butyl acrylate or similar monomers having water repellency characteristics have improved corrosion resistant properties.