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LF-PM12 Diphenyl Silicone Oil
Silfluo LF-PM12 is a series of diphenyl dimethyl polysiloxane copolymer fluids (CAS 68083-14-7) with trimethylsilyl end groups and a backbone containing both diphenylsiloxane (D-Ph) and dimethylsiloxane (D-Me) repeat units, available in three grades (LF-PM12A, B, D) differentiated by diphenyl content and refractive index.
The molecular architecture — bulky diphenyl groups distributed along a dimethylsiloxane backbone — delivers higher thermal stability (continuous service to 250–300°C), higher refractive index (1.420–1.510), and superior oxidative and radiation resistance compared to standard PDMS, while trimethylsilyl end-capping renders these fluids fully non-reactive.
LF-PM12 occupies a distinct position relative to LF-PM11 (phenylmethyl backbone, reactive end groups available) and LF-OHP2 (all-diphenyl backbone, silanol-terminated reactive polymer): LF-PM12 is a non-reactive, trimethyl-terminated functional fluid optimized for use as a heat-transfer medium, dielectric fluid, optical blending component, or cosmetic emollient rather than as a curable base polymer.
