Silicone emulsion composition for surface release treatment

摘要

Proposed is an improved aqueous silicone emulsion composition for surface-release treatment comprising a vinyl-containing organopolysiloxane and an organohydrogenpolysiloxane emulsified is an aqueous medium with addition of a platinum compound as a catalyst for the hydrosilation reaction between the silicon-bonded vinyl groups and silicon-bonded hydrogen atoms. Different from conventional silicone emulsion compositions of this type having a pH value of around neutrality, the inventive silicone emulsion composition has a pH value not higher than 5 so that a quite unexpected advantage can be obtained that the stability of the emulsion composition in the curability and other properties after a long period of storage and against mechanical working can be greatly improved.