Method of reducing a content of a residual styrene monomer in a polyol

A method of reducing a content of a residual styrene monomer and a residual acrylonitrile monomer in a polyol, said method comprising the steps of:

• providing the polyol comprising the content of the residual styrene monomer and the residual acrylonitrile monomer;
• introducing 1,1-Di(tert-amylperoxy)cyclohexane to the polyol to form a mixture after the step of providing the polyol;
• subsequently raising a temperature of the mixture of the 1-Di(tert-amylperoxy)cyclohexane and the polyol to polymerize the residual styrene monomer in the polyol through reaction of the residual styrene monomer with peroxide radicals present in the 1,1-Di(tert-amylperoxy)cyclohexane and to polymerize the residual acrylonitrile monomer in the polyol through reaction of the residual acrylonitrile monomer with the peroxide radicals;
• and
• applying a vacuum to separate the residual styrene monomer from the polyol.