Poly(phenylmethylsiloxane), Divinyl‑Terminated

Name: Poly(phenylmethylsiloxane), Divinyl‑Terminated
Brand: Siwin
Rating: 5.0 (23 reviews)

Siwin‑VPP21 is linear poly(phenylmethylsiloxane) with divinyl terminal groups. It serves as a vinyl‑functional component for liquid phenyl silicone rubber and acts as an effective diluent for phenyl silicone resin. Multiple viscosity grades are available for high‑temperature resistant phenyl‑silicone formulation projects. Stable bulk supply and technical formulation support are provided.

Model:
Siwin‑VPP21
Brand:
Siwin
Siwin Code:
Siwin‑VPP21
CAS No.:
25927-21-9

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Product Description

Siwin‑VPP21

Poly(phenylmethylsiloxane) terminated by divinyl

Typical properties

Product No.	Siwin-VPP21
Product Name	Poly(phenylmethylsiloxane), divinyl terminated
CAS No.	25927-21-9
Molecular Structure

Model	Appearance	Viscosity (25℃, mPa.s)	Refractive index nᴰ²⁵	Volatiles %	Vinyl Content (mmol/g)
VPP21-1000	Colorless and oil-like liquid	800~1200	1.53~1.55	≤2.0	0.50-0.70
VPP21-2000	Colorless and oil-like liquid	1800~2200	1.53~1.55	≤1.0	0.40-0.50
VPP21-3000	Colorless and oil-like liquid	2700~3300	1.53~1.55	≤1.0	0.30-0.50
VPP21-5000	Colorless and oil-like liquid	4000~6000	1.53~1.55	≤1.0	0.30-0.40
VPP21-8000	Colorless and oil-like liquid	7000~9000	1.53~1.55	≤1.0	0.20-0.30

Application

Siwin-VPP21 is a kind of linear polysiloxane. It was used as a component functionalized by vinyl of liquid phenyl silicone rubber and diluent of phenyl silicone resin.

Package & Storage

Packaged with 25kg, 200kg coating metal drum, store in a cool ventilated place.

The storage period is 12 months.