ACCELERATING EFFECTS ON GELLING OF SBR-LATICES

In studies on manufacturing of foam rubbers, it was found that gelling of SBR-latices is accelerated by adding water-soluble salts of amino acid such as gelatine, glue and sodium glutaminate to latices. It was considered that gelling of SBR-latices is accelerated due to the creaming action to latex in the case of gelatine and glue, and due to zinc ions that is induced by the reaction with zinc oxide in the case of sodium glutaminate. In this case, the quantity of induced zinc ions differs by pH and temperature of compounded latices, and also by the chemicals added.