Method for stabilising silicone elastomer moulds
AssigneeRhodia Chimie
InventorsJerome Bressieux, Thomas Deforth, Christian Pusineri
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Abstract
The invention concerns the use for increasing the life span of moulds made of silicone elastomer crosslinking by polyaddition or polycondensation reaction, of an additive capable of stabilising the silicone elastomer whereof the mould is constituted with respect to materials to be moulded, said additive corresponding the following formula (1) wherein R1 and R2 are linear or branched alkyl radicals or cycloaliphatic radicals having 1 to 40 carbon atoms. Preferably, said additive is methyl laurylthiopropionate. C12H25—S—CH3—CH2—CO—O—CH3. The invention also concerns the corresponding silicone compositions and the resulting moulds.
Claims24
Use, for increasing the longevity of molds made of silicone elastomer which crosslinks by a polyaddition or polycondensation reaction, of an additive capable of stabilizing the silicone elastomer constituting the mold with respect to materials to be molded, the additive corresponding to the following formula (1):
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- in which R1 and R2 are linear or branched alkyl radicals or cycloaliphatic radicals having from 1 to 40 carbon atoms:
A precursor silicone composition of a silicone elastomer which can be used for the formation of molds, in particular of molds for the molding of polyester items, characterized in that it comprises, as stabilization additive, at least one additive corresponding to the following formula (1):
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- in which R1 and R2 are linear or branched alkyl radicals or cycloaliphatic radicals having from 1 to 40 carbon atoms.
Dependencies are inferred from the claim text.