Patents by Inventor Sai H. Hui

Sai H. Hui 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).

  • Glyoxal-containing binder insolubilizer
    Patent number: 5114999
    Abstract: Disclosed is a binder insolubilizer for use in binder-containing paper coating compositions, the insolubilizer consisting essentially of an aqueous formulation containing at least about 15 weight percent of titratable glyoxal and at least one polyhydroxy compound.
    Type: Grant
    Filed: April 3, 1989
    Date of Patent: May 19, 1992
    Assignee: PPG Industries, Inc.
    Inventors: Sai H. Hui, W. Bruce Darlington
  • Surface sizing composition
    Patent number: 5059675
    Abstract: Disclosed are compositions useful as surface coatings for nonwoven substrates which compositions are reaction products of a melamine formaldehyde compound, long chain saturated alcohols and long chain saturated or unsaturated polyethoxylated alcohols. The invention compositions when used to surface size paper impart oil, water and polar solvent resistance thereto. The compositions may be used alone or as substantial replacements for anionic or non-ionic fluorocarbon based surface sizes that are typically used to impart oil resistance to paper.
    Type: Grant
    Filed: November 14, 1988
    Date of Patent: October 22, 1991
    Assignee: PPG Industries, Inc.
    Inventors: William W. Carlin, Sai H. Hui, John D. Mansell
  • Cationic surface sizing emulsion
    Patent number: 5030678
    Abstract: Disclosed are cationic aqueous emulsions containing (a) sizing composition comprising the reaction product of melamine formaldehyde compound, long chain saturated alcohol and long chain saturated or unsaturated polyethoxylated alcohol; and (b) cationic surfactant. The emulsions when used to surface size paper impart improved oil, water and polar solvent resistance thereto. The emulsions may be used alone or as substantial replacements for anionic or non-ionic fluorocarbon based emulsions that are typically used to impart oil resistance to paper.
    Type: Grant
    Filed: July 2, 1990
    Date of Patent: July 9, 1991
    Assignee: PPG Industries, Inc.
    Inventors: Sai H. Hui, Mean-Jeng Hou
  • High solids content calcium stearate dispersions
    Patent number: 4997479
    Abstract: This invention relates to urea-free high solids content aqueous calcium stearate dispersions useful as lubricating agents in paper and paperboard coating compositions.
    Type: Grant
    Filed: February 5, 1990
    Date of Patent: March 5, 1991
    Assignee: PPG Industries, Inc.
    Inventors: Mean-Jeng Hou, Sai H. Hui
  • Coating binder additive
    Patent number: 4837087
    Abstract: A coating binder additive is prepared comprising a blocked glyoxal resin mixed with a vinyl or acrylic water soluble polymer which is reactive with free glyoxal.
    Type: Grant
    Filed: June 25, 1987
    Date of Patent: June 6, 1989
    Assignee: Sequa Chemicals Inc.
    Inventors: William C. Floyd, Sai H. Hui
  • Coating binder additive
    Patent number: 4695606
    Abstract: A coating binder additive is prepared comprising a blocked glyoxal resin mixed with a vinyl or acrylic water soluble polymer which is reactive with free glyoxal.
    Type: Grant
    Filed: September 22, 1986
    Date of Patent: September 22, 1987
    Assignee: Sun Chemical Corporation
    Inventors: William C. Floyd, Sai H. Hui
  • Compounds and their use as insolubilizers for binders for paper coating compositions
    Patent number: 4544609
    Abstract: Paper coating compositions contain at least one pigment, at least one binder, and, as an insolubilizer for the binder, the product of the reaction of a low molecular weight polyacrylamide with glyoxal and a urea or a cyclic urea.
    Type: Grant
    Filed: September 12, 1984
    Date of Patent: October 1, 1985
    Assignee: Sun Chemical Corporation
    Inventor: Sai H. Hui