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LF-OHPV Vinyl Hydroxy Silicone Oil
Silfluo LF-OHPV is a vinyl-modified hydroxyl-terminated polysiloxane oligomer (CAS 67923-19-7), a bifunctional siloxane with silanol (Si–OH) end groups and pendant vinyl groups distributed along the backbone.
The two functional group types serve distinct roles in addition-cure silicone compounding: silanol groups interact with fumed silica surface silanols to reduce filler–polymer interaction, controlling compound viscosity and preventing crepe hardening during storage; vinyl groups participate in Pt-catalyzed hydrosilylation crosslinking, incorporating the fluid covalently into the elastomer network and preventing migration or bleed-out from the cured rubber.
Three grades — LF-OHPV-1, LF-OHPV-2.5, and LF-OHPV-10 — provide identical viscosity (35 mPa·s) and hydroxyl content (9.0 wt%) with increasing vinyl content (1.0, 2.5, and 11.5 wt%), allowing independent tuning of crosslink participation level without altering filler treatment performance.
