Patent ID: 8779046
Filing Date: 2014-07-15
Classification: C08K

Abstract:
1. A method for making a polymer composition, comprising mixing aqueous polymer dispersion comprising polymer primary particles with an aqueous colloidal solution of spherical inorganic particles having an average diameter of 10 to 300 nm, said inorganic particles being hydrophilic, stabilized, not surface-treated, and stably dispersed in said solution, the ratio (D inorganic/ D polymer ) of the average particle diameter (D inorganic ) of said inorganic particles to the average primary particle diameter (D polymer ) of said polymer primary particles being 0.1 to 2.0, wherein said inorganic particles are present in 0.1 to 40 wt % based on the combined weight of said polymer and said inorganic particles, coagulating the resultant mixture by the addition of electrolyte, wherein said electrolyte is in the form of an aqueous solution and the amount of said electrolyte is from 0.02 to 10 weight percent based on the combined weight of said electrolyte and said polymer, to make a co-aggregate of the polymer primary particles with said inorganic particles, separating said co-aggregate, and drying said co-aggregate.