Patents by Inventor Loan A. Ho

Loan A. Ho 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).

  • High molecular weight epoxy ester resin composition, process therefor and coating composition
    Patent number: 5391652
    Abstract: An epoxy ester resin which results from reacting (a) an epoxy resin, (b) a dimerized fatty acid and (c) a monocarboxylic acid. The epoxy ester resins are useful in coating compositions.
    Type: Grant
    Filed: April 23, 1993
    Date of Patent: February 21, 1995
    Assignee: The Dow Chemical Company
    Inventors: David S. Wang, Pong S. Sheih, Loan A. Ho, Charles M. Vetters
  • Advanced epoxy compositions, curable compositions and cured products
    Patent number: 5151485
    Abstract: Compositions are prepared by the reaction of (A) an advanced composition resulting from reacting (1) at least one of (a) at least one epoxidized triglyceride of a fatty acid, or (b) at least one epoxidized fatty acid having an average of more than one unsaturated group per molecule or (c) at least one diepoxyalkane, or (d) any combination of any two or more of (a), (b) or (c), or (e) a combination of any one or more of (a), (b) or (c) and (f) a diglycidyl ether of a dihydric phenol; with (2) a dihydric phenol; (B) optionally a monohydric phenol; (C) a phosphorous-containing compound; and (D) optionally a base. These compositions can be cured with curing agents which react with aliphatic hydroxyl groups.
    Type: Grant
    Filed: October 30, 1991
    Date of Patent: September 29, 1992
    Assignee: The Dow Chemical Company
    Inventors: Duane S. Treybig, David S. Wang, Pong S. Sheih, Loan A. Ho
  • Advanced epoxy compositions, curable compositions and cured products
    Patent number: 5095050
    Abstract: Compositions are prepared by the reaction of (A) an advanced composition resulting from reacting (1) at least one of (a) at least one epoxidized triglyceride of a fatty acid, or (b) at least one epoxidized fatty acid having an average of more than one unsaturated group per molecule or (c) at least one diepoxyalkane, or (d) any combination of any two or more of (a), (b) or (c), or (e) a combination of any one or more of (a), (b) or (c) and (f) a diglycidyl ether of a dihydric phenol; with (2) a dihydric phenol; (B) optionally a monohydric phenol; (C) a phosphorus-containing compound; and (D) optionally a base. These compositions can be cured with curing agents which react with aliphatic hydroxyl groups.
    Type: Grant
    Filed: November 21, 1990
    Date of Patent: March 10, 1992
    Assignee: The Dow Chemical Company
    Inventors: Duane S. Treybig, David S. Wang, Pong S. Sheih, Loan A. Ho
  • Epoxy resins containing phosphonium catalysts
    Patent number: 4933420
    Abstract: Epoxide compounds and phenolic compounds are reacted in the presence of phosphonium compounds represented by the formula .crclbar.Z'R.sup.1 R.sup.2 R.sup.3 P.sym.-Z-P.sym.R.sup.1 R.sup.2 R.sup.3 Z'.crclbar. wherein each R.sup.1, R.sup.2 and R.sup.3 is independently an aromatic group or an inertly substituted aromatic group; Z is --(C(R.sup.4).sub.2).sub.a --; each R.sup.4 is independently hydrogen or a hydrocarbyl group containing from 1 to about 20 carbon atoms; Z' is any suitable anion and a has a value of at least 4.
    Type: Grant
    Filed: September 23, 1988
    Date of Patent: June 12, 1990
    Assignee: The Dow Chemical Company
    Inventors: Ha Q. Pham, Loan A. Ho
  • Preparation of advanced epoxy resins from epoxy resins and dihydric phenols in the presence of phosphonium compounds
    Patent number: 4808692
    Abstract: Advanced epoxy resins are prepared from glycidyl ethers of bisphenols or biphenols in the presence of cycloalkyl triphenyl phosphonium catalysts.
    Type: Grant
    Filed: February 18, 1988
    Date of Patent: February 28, 1989
    Assignee: The Dow Chemical Company
    Inventors: Ha Q. Pham, Loan A. Ho