Improved physical properties from directly emulsified silicone latices through appropriate surfactant selection

摘要

Physical properties of aqueous polydiorganosiloxane dispersions such as freeze/thaw stability and physical properties of the elastomeric films derived therefrom, such as high temperature heat stability and clarity, are improved by selecting an appropriate surfactant with specific characteristics. Herein, the polydiorganosiloxane dispersion is made through a direct emulsification process. The high temperature stability and clarity of the elastomer formed from our dispersion avoid surfactants which form siloxane redistribution catalysts at temperatures above 100 DEG C. and surfactants which do not produce a matched refractive index of the phases.