TY - PAT
T1 - Water expendable polymer beads
AU - Ghurmallah, Ghamdi
AU - Hamdan, Mohammed
AU - Jansen, Martijn A.G.
AU - Nelissen, Laurent N.I.H.
PY - 2013/3/7
Y1 - 2013/3/7
N2 - The present invention relates to a process for the emulsifier-free preparation of water expandable polymer beads. The process comprises the steps of: a) providing an emulsifier-free monomer composition comprising styrene and a polar comonomer comprising a carbon-to-carbon double bond, b) prepolymerizing the monomer composition to obtain a prepolymer composition comprising styrene, the polar comonomer and their copolymer, c) adding an aqueous dispersion of nanoclay to the prepolymer com- position to obtain an inverse emulsion, d) suspending the inverse emulsion obtained by step c) in an aqueous medium to yield an aqueous suspension of suspended droplets and e) polymerizing the monomers in the droplets of the suspension obtained by step d).
AB - The present invention relates to a process for the emulsifier-free preparation of water expandable polymer beads. The process comprises the steps of: a) providing an emulsifier-free monomer composition comprising styrene and a polar comonomer comprising a carbon-to-carbon double bond, b) prepolymerizing the monomer composition to obtain a prepolymer composition comprising styrene, the polar comonomer and their copolymer, c) adding an aqueous dispersion of nanoclay to the prepolymer com- position to obtain an inverse emulsion, d) suspending the inverse emulsion obtained by step c) in an aqueous medium to yield an aqueous suspension of suspended droplets and e) polymerizing the monomers in the droplets of the suspension obtained by step d).
UR - https://worldwide.espacenet.com/patent/search/family/046851375/publication/WO2013029757A1?q=WO%202013%2F029757
M3 - Patent publication
M1 - WO2013/029757
Y2 - 2012/08/21
ER -