STUDY ON COPRECIPITATED RUBBER AND PLASTIC MATERIALS WITH METALLIC SILICATE (1)

PREPARATION OF COPRECIPITATED SBR WITH VARIOUS TYPES OF SILICATES AND THEIR PROPERTIES

Abstract

To a mixture of SBR latex with dilute sodium silicate solution an insolubilizing agent (for example HCl, CaCl₂, MgCl₂, SrCl₂, BaCl₂, FeCl₃, CoCl₂ and CuSO₄) is added with rapid stirring, rubber and silicate are both coprecipitated and admixed intimately. The coprecipitated materials are vulcanizable by conventional processes. Tesile strength and tear resistance of the vulcanizates are higher than those of the conventional milling compounds are shown.