Provided is an oil composition which has a proper viscosity stably and also has a lubricating property, a washing property and a cooling property.

Therefore, the sealing property and lubricant property are improved, and thus high efficiency of the compressor can be realized.

Additive requirements include high lubricating property, economical efficiency and stable performance.

This reaction results in organic solvent compatible silicone crosslinked unsaturated hydrocarbon based polymers that have excellent lubricity and are clear gels.