Patents Assigned to ATOFINA, Elf Atochem, S.A.
  • Patent number: 6825301
    Abstract: The invention concerns a water-in-oil polymer emulsion containing in an organic and continuous phase practically non-miscible in water, finely comminuted water soluble polymers or capable of being swollen in water, a water-in-oil emulsifying agent and optionally wetting agents. The invention also concerns a method for preparing said emulsion. More particularly, it concerns a method for invert emulsion in the presence of one or several initiators belonging a specific family of azacarboxylic acid esters.
    Type: Grant
    Filed: September 12, 2002
    Date of Patent: November 30, 2004
    Assignee: ATOFINA, Elf Atochem, S.A.
    Inventors: Martine Cerf, Karine Triballier, Fran├žoise Benard