Patents by Inventor Chiu-Kwan Lam

Chiu-Kwan Lam has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Monovinylidene aromatic and conjugated diene copolymer coating compositions comprising sulfoalkyl monomeric emulsifier
    Patent number: 5302655
    Abstract: It has been found that monovinylidene aromatic/conjugated diene/ethylenically unsaturated acid copolymer compositions are provided with good combinations of physical properties when a sulfoalkyl monomer is employed in minor amounts in such polymer in place of emulsifying additive(s). In particular, the combinations of wet and dry pick resistance have been shown to be maintained or improved when paper coating formulations are prepared from latex polymer compositions according to this invention. Sulfoalkyl (meth)acrylate salts and 2-acrylamido-2-methylpropane sulfonic acid salts are shown to be suitable sulfoalkyl monomers for this purpose.
    Type: Grant
    Filed: December 26, 1991
    Date of Patent: April 12, 1994
    Assignee: The Dow Chemical Company
    Inventors: Jean-Luc Guillaume, Stephen M. Oliver, Chiu-Kwan Lam
  • Monovinylidene aromatic and conjugated diene copolymer coating compositions comprising sulfoalkyl monomeric emulsifier
    Patent number: 5274027
    Abstract: It has been found that monovinylidene aromatic/conjugated diene/ethylenically unsaturated acid copolymer compositions are provided with good combinations of physical properties when a sulfoalkyl monomer is employed in minor amounts in such polymer in place of emulsifying additive(s). In particular, the combinations of wet and dry pick resistance have been shown to be maintained or improved when paper coating formulations are prepared from latex polymer compositions according to this invention. Sulfoalkyl (meth)acrylate salts and 2-acrylamido-2-methylpropane sulfonic acid salts are shown to be suitable sulfoalkyl monomers for this purpose.
    Type: Grant
    Filed: December 26, 1991
    Date of Patent: December 28, 1993
    Assignee: The Dow Chemical Company
    Inventors: Jean-Luc Guillaume, Stephen M. Oliver, Chiu-Kwan Lam