Patent ID: 7879965
Filing Date: 2011-02-01
Classification: C04B,C08F,C09K,E04C,Y10S

Abstract:
1. A polymer latex substantially stable against divalent ions comprising a styrene butadiene polymer consisting of: from about 7 to about 40% wt. % butadiene; from about 45 to about 90 wt. % styrene; from about 0.25 to 10 wt. % 2-acrylamido-2-methyl propanesulfonic acid salt; and optionally from about 0.25 to about 20 wt. % of a hydrophilic adjunct comonomer selected from the group consisting of hydroxyethyl acrylate, hydroxyethyl methacrylate, acrylonitrile, methacrylonitrile, acrylamide, methacrylamide, and mixtures thereof.