Patent ID: 6861462
Filing Date: 2005-03-01
Classification: B60C,C08J,C08K

Abstract:
1. A process of preparing a nanocomposite comprised of an elastomer and at least partially exfoliated platelets from a water-swellable clay which comprises blending: (A) an aqueous pre-formed elastomer latex comprised of elastomer particles with cations on the surface thereof prepared by aqueous free radical induced polymerization of monomers in the presence of a free radical generating polymerization initiator and surfactant; wherein said monomers are comprised of: wherein said elastomeric polymer particles are stabilized in said latex by a surfactant selected from: (B) an aqueous mixture of water and a multilayered water-swellable clay which contains cationically exchangeable ions in its galleries between said layers, exclusive of an intercalant for said clay, wherein said water-swellable clay is comprised of a plurality of stacked platelets with water-swollen galleries between said platelets.