Drag reduction agents for aqueous salt solutions
Micellar process for the production of acrylamide-alkyl acrylamide copolymers Patent #: 4528348
ApplicationNo. 537839 filed on 06/13/1990
US Classes:526/310From nitrogen containing monomer other than acrylonitrile or methacrylonitrile
ExaminersPrimary: Schofer, Joseph L.
Assistant: Smith, Jerry
Attorney, Agent or Firm
International ClassC08F 265/04
AbstractThe synthesis of a novel family of cationic monomers capable of forming viscoelastic fluids are described within. These monomers are formed primarily through the reaction of allyl halides and dimethyl alkylamines. The rheological properties of the fluids can be dramatically modified with changes in alkyl length and/or counterion structure. In addition, it is noted that these viscoelastic fluids have properties quite similar to conventional polymer solutions even though the former structures are held together through physical forces and not through chemical bonding as in the latter materials. In addition, the properties of this unique family of cationic monomers are capable of forming viscoelastic fluids in high brine solutions. Even though the counterion attached to the monomer contributes greatly to the rheological properties, addition of soluble acid, bases and salts do not destroy (through ion exchange mechanisms) the viscoelastic properties of these fluids.