Typical Technical Properties of Vinyl Hydroxy Silicone Oil LF-OHPV
Item | CAS NO. | Viscosity (25°C, mm2/s) | Hydroxyl Content (wt%) | OH Content (wt%) |
LF-OHPV-1 | 67923-19-7 | 35 | 9.0 | 1.0 |
LF-OHPV-2.5 | 67923-19-7 | 35 | 9.0 | 2.5 |
LF-OHPV-10 | 67923-19-7 | 35 | 9.0 | 11.5 |
Applications of Vinyl Hydroxy Silicone Oil LF-OHPV
1. Structure Control Agent — Anti-Crepe Hardening in LSR and HTV
Used in LSR and HTV silicone rubber compounding to treat fumed silica in-situ during mixing. Silanol groups react with and cap fumed silica surface hydroxyls, reducing filler network formation, lowering compound viscosity, and preventing crepe hardening during uncured rubber storage. Vinyl groups ensure the agent is incorporated into the cured network rather than acting as a free fluid. Grade selection (vinyl content) determines the degree of network participation relative to plasticizing effect; optimize addition level and grade via compound trials for target compound viscosity, cured hardness, and mechanical properties.
2. Non-Bleeding Reactive Plasticizer
Used as reactive plasticizer in addition-cure LSR formulations where permanent reduction of compound hardness, improvement of elongation at break, and tear strength are required without surface bleed or oil exudation in the cured part. Vinyl groups crosslink into the Pt-catalyzed network during cure, permanently anchoring the plasticizing siloxane segments. Ensure sufficient Si–H crosslinker (LF-H101H, LF-H101L, or LF-H101TS) is present to react with added vinyl content from LF-OHPV when calculating Si–H to vinyl stoichiometry.
3. Filler Surface Treatment for Addition-Cure Systems
Used as surface treatment agent for inorganic fillers and pigments incorporated into Pt-catalyzed addition-cure systems. Silanol groups anchor to filler surfaces; vinyl groups ensure compatibility with the addition-cure matrix without contributing Pt catalyst-inhibiting species. Verify absence of inhibitory contaminants in the filler before use.
4. Adhesion Promoter and Coupling Agent Intermediate
Used as bifunctional reactive building block for synthesizing silicone-based adhesion promoters and specialty coupling agents requiring both silanol anchoring and vinyl reactivity in the same molecule.
Grade | Vinyl Content | Recommended Use |
LF-OHPV-1 | 1.0 wt% | Filler structure control primary; low crosslink network contribution |
LF-OHPV-2.5 | 2.5 wt% | Balanced structure control and network participation; general LSR compounding |
LF-OHPV-10 | 11.5 wt% | High vinyl crosslink participation; reactive plasticizer with significant network contribution; specialty addition-cure systems |
Package & Storage of Vinyl Hydroxy Silicone Oil LF-OHPV
In 200kg/drum; 1000kg/IBC.
Keep in cool, dry and ventilated place. Keep away from sunlight and fire sources. Keep in unopened containers, shelf life is 24 months from the date of production. It is shipped as non-hazardous substance.
Storage beyond the shelf life does not necessarily mean that the product is no longer usable. In this case however, the properties required for the intended use must be checked for quality assurance reasons.
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