Patent ID: 7285590
Filing Date: 2007-10-23
Classification: C08F,C09D

Abstract:
1. An aqueous dispersion, having a minimum film formation temperature no greater than about 50° C., comprising a multi-stage emulsion polymer made by a process that comprises: a first polymerization stage, in which a first monomer mixture having a calculated glass transition temperature of at least about 50° C. is polymerized via free radical emulsion polymerization to obtain a first-stage emulsion polymer, the first monomer mixture comprising: a second polymerization stage, in which a second monomer mixture having a calculated glass transition temperature from about −30° C. to about 10° C. is polymerized via free radical emulsion polymerization, in the presence of the first-stage emulsion polymer, to obtain the multi-stage emulsion polymer, the second monomer mixture comprising: