Water expendable polymer beads

Ghamdi Ghurmallah (Inventor), Martijn A.G. Jansen (Inventor), Laurent N.I.H. Nelissen (Inventor)

    Research output: PatentPatent publication

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    The present invention relates to a process for the emulsifier-free preparation of water expendable polymer beads, which process comprises the steps of a) providing an emulsifier-free starting composition comprising styrene and a polyphenylene ether resin, b) prepolymerizing the starting composition to obtain a prepolymer composition, c) adding an aqueous dispersion of a modifier-free nanoclay to the prepolymer composition to obtain an inverse emulsion, d) suspending the inverse emulsion obtained by step c) in an aqueous medium to yield an an aqueous suspension of suspended droplets and e) polymerizing the monomers in the droplets of the suspension obtained by step d) to obtain the water expendable polymer beas.
    Original languageEnglish
    Patent numberWO2013/034276
    Priority date9/09/11
    Filing date4/09/12
    Publication statusPublished - 4 Sept 2012


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