Patents by Inventor Koei-Liang Liauw

Koei-Liang Liauw 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).

  • Preparation of mixtures of methyltin trichloride and dimethyltin dichloride from stanic chloride and dimethyltin dichloride without catalyst and conversion to mixed methyltin mercaptide stabilizers
    Patent number: 4434102
    Abstract: A process for making a mixed product of dimethyltin dichloride and methyltin trichloride by reacting dimethyltin dichloride with stannic chloride without catalyst. The mixed product is useful as an intermediate, without further purification, in the preparation of corresponding mercaptide stabilizer for vinyl chloride polymers.
    Type: Grant
    Filed: January 23, 1981
    Date of Patent: February 28, 1984
    Assignee: Witco Chemical Corporation
    Inventors: Gerald Spiegelman, Koei-Liang Liauw
  • Thioglycolate and thiopropionate secondary stabilizers
    Patent number: 4374945
    Abstract: Certain substituted thioglycolates and thiopropionates were found useful as secondary stabilizers for polymers, particularly polyvinyl chloride, when used in conjunction with metal octanoates, such as zinc octanoate, as the primary stabilizer. The specific thioglycolates and thiopropionates are those formed by thio adducts to the double bond of a monomer, such as the product of reacting isooctyl thioglycolate with glycidyl acrylate, to provide isooctyl S-2(glycidyloxycarbonyl)ethyl thioglycolate, as an example.
    Type: Grant
    Filed: March 11, 1981
    Date of Patent: February 22, 1983
    Assignee: Witco Chemical Corporation
    Inventors: Koei-Liang Liauw, Michael H. Fisch
  • Di(2-methyl-2-phenyl propyl) peroxy dicarbonate and other novel (2-alkyl-2-phenyl) substituted peroxy dicarbonates
    Patent number: 4285877
    Abstract: Novel peroxydicarbonates are provided in which the alkyl carbonate moiety is 2-alkyl-2-phenyl substituted. The compounds are useful as polymerization initiators of ethylenically unsaturated monomers, such a vinyl chloride, and as catalysts of unsaturated polyester resins. The subject peroxydicarbonates are characterized in that they are solid at room temperature, have ambient temperature stability in spite of a low 10 hour half-life temperature, and can normally be transported and stored without refrigeration.
    Type: Grant
    Filed: January 17, 1980
    Date of Patent: August 25, 1981
    Assignee: Argus Chemical Corporation
    Inventors: Reidar Halle, David Peterson, Michael A. Fisch, Koei-Liang Liauw
  • Preparation of trimethyltin chloride from dimethyltin dichloride
    Patent number: 4282165
    Abstract: A trialkyltin chloride in which the alkyl groups have from about one to six carbon atoms is prepared, without detectable tetraalkyltin, from the corresponding dialkyltin dichloride in one step and in high yield using a catalyst mixture comprising a trihydrocarbylamine or trihydrocarbylphosphine and stannic chloride.
    Type: Grant
    Filed: March 24, 1980
    Date of Patent: August 4, 1981
    Assignee: Argus Chemical Corporation
    Inventors: Koei-Liang Liauw, Michael H. Fisch
  • Preparation of lower trialkyltin hydride from trialkyltin chloride
    Patent number: 4282166
    Abstract: A simple, direct, and safe process for preparing an organic solvent solution of a lower trialkyltin hydride of high purity and in high yield by reacting a lower trialkyltin chloride with an alkali metal bis(2-alkoxyethoxy)aluminum dihydride in a hydrocarbon solvent boiling in the 50.degree. to 200.degree. C. range.
    Type: Grant
    Filed: April 11, 1980
    Date of Patent: August 4, 1981
    Assignee: Argus Chemical Corporation
    Inventors: Koei-Liang Liauw, Michael H. Fisch
  • Preparation of mixtures of methyltin trichloride and dimethyltin dichloride from stannic chloride and dimethyltin dichloride
    Patent number: 4269782
    Abstract: A process for making a mixed product of dimethyltin dichloride and methyltin trichloride by reacting dimethyltin dichloride with stannic chloride without catalyst. The mixed product is useful as an intermediate, without further purification, in the preparation of corresponding mercaptide stabilizer for vinyl chloride polymers.
    Type: Grant
    Filed: July 19, 1979
    Date of Patent: May 26, 1981
    Assignee: Argus Chemical Corporation
    Inventors: Gerald Spiegelman, Koei-Liang Liauw