Method for stabilising silicone elastomer moulds

摘要

The invention concerns the use for increasing the life span of molds made of silicone elastomer crosslinking by polyaddition or polycondensation reaction, of an additive capable of stabilizing the silicone elastomer whereof the mold is constituted with respect to materials to be mouded, said additive corresponding the following formula (1) wherein R<1 >and R<2 >are linear or branched alkyl radicals or cycloaliphatic radicals having 1 to 40 carbon atoms. Preferably, said additive is methyl laurylthiopropionate. C12H25-S-CH2-CH2-CO-O-CH3. The invention also concerns the corresponding silicone compositions and the resulting molds.