Abstract:
The present invention relates to a process for precipitation polymerization of Alpha -methylstyrene in a hydrocarbon medium in which poly- Alpha -methylstyrene is insoluble or only little soluble. The polymerization is initiated by a finely divided alkali metal which is used together with certain phosphoric acid amides or ethers or mixtures thereof as polymerization accelerators.
Abstract:
A PROCESS IS DISCLOSED FOR THE PRECIPITATION POLYMERIZATION OF A-METHYLSTYRENE, WHICH MAY BE SUBSTITUTED, IN THE PRESENCE OF A HYDROCARBON INERT TO ALKALI METALS, AT LEAST ONE FINELY DIVIDED ALKALI METAL, A PHOSPHORIC ACID AMIDE AS ACCELERATOR AND A CO-ACCELERATOR, AT A TEMPERATURES WITHIN THE RANGE OF FROM-20*C. TO +40*C. THE POLYMERS THUS ARE OBTAINED IN A GRAINY, FILTERABLE FORM.