Patents by Inventor Wen-Hsuan Chang

Wen-Hsuan Chang 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).

  • Patent number: 4477618
    Abstract: A high solids, organic solvent based, sprayable coating composition which is capable of acid catalyzed crosslinking is composed of an active hydrogen-containing resin, a curing agent present externally and/or internally as a part of the active hydrogen-containing resin, and a catalytic amount of a non-ionic ester of a sulfonic acid. The sulfonic acid ester is represented by the following structural formula: ##STR1## wherein: Z is a radical selected from the group consisting of amino and an organic radical, said organic radical being connected to the sulfur atom by a carbon atom; ##STR2## C.sub.3 -C.sub.20 cycloalkyl; and R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 are independently hydrogen or an organic radical. These groups can be particularly described as follows:R.sub.1 is hydrogen, carboalkoxy, C.sub.3 -C.sub.20 alkyl, C.sub.6 -C.sub.18 aryl, or C.sub.3 -C.sub.20 cycloalkyl;R.sub.2 is hydrogen, carboalkoxy, C.sub.3 -C.sub.20 alkyl, C.sub.6 -C.sub.18 aryl, or C.sub.3 -C.sub.20 cycloalkyl;R.sub.
    Type: Grant
    Filed: September 29, 1982
    Date of Patent: October 16, 1984
    Assignee: PPG Industries, Inc.
    Inventors: Debra L. Singer, Gregory J. McCollum, Rostyslaw Dowbenko, Roger M. Christenson, Michael M. Chau, Wen-Hsuan Chang
  • Patent number: 4469832
    Abstract: A high solids, organic solvent based, sprayable coating composition which is capable of acid catalyzed crosslinking is composed of an active hydrogen-containing resin, a curing agent present externally and/or internally as a part of the active hydrogen-containing resin, and a catalytic amount of a non-ionic, saturated or unsaturated organic polycyclic ester of a sulfonic acid.
    Type: Grant
    Filed: September 29, 1982
    Date of Patent: September 4, 1984
    Assignee: PPG Industries, Inc.
    Inventors: Debra L. Singer, Karl F. Schimmel, Rostyslaw Dowbenko, Michael M. Chau, Wen-Hsuan Chang
  • Patent number: 4468492
    Abstract: A low temperature curing composition prepared from an essentially silicon-free polymer and a silicon group-containing material is improved by utilizing a silicon group-containing material which is a hydrolyzable organosilicon group-containing polymer which is non-gelled and formed from an essentially silicon-free polymer having isocyanate or active hydrogen functional groups and an organosilicon group-containing material having functional groups reactive with the isocyanate and active hydrogen.
    Type: Grant
    Filed: July 15, 1983
    Date of Patent: August 28, 1984
    Assignee: PPG Industries, Inc.
    Inventors: Robert Piccirilli, Wen-Hsuan Chang
  • Patent number: 4467081
    Abstract: Disclosed is a resin comprising a reaction product prepared by partially reacting to homogeneity a hydrophobic polyol and an organosilicon-containing material comprising an organosilicon-containing substance. The organosilicon-containing substance has atoms bonded directly to silicon, all of which atoms are selected from oxygen, nitrogen, and/or chlorine, and additionally has moieties directly bonded to silicon which are easily displaceable by reaction with water and/or alcohol. At least a part of the organosilicon-containing substance is hydrolyzed. The reaction product is homogeneous and contains residual hydroxyl moieties from the hydrophobic polyol and residual moieties bonded directly to silicon which are easily displaceable. the reaction product is capable of self-curing, optionally with a catalyst, by reaction with moisture and/or with the residual hydroxyl moieties, of the residual moieties directly bonded to silicon which are easily displaceable.
    Type: Grant
    Filed: January 31, 1983
    Date of Patent: August 21, 1984
    Assignee: PPG Industries, Inc.
    Inventors: Wen-Hsuan Chang, David T. McKeough, John R. Peffer
  • Patent number: 4446292
    Abstract: Disclosed is a liquid composition containing a reaction product prepared by reacting a hydrophobic polyol and an organosilicon-containing material. The organosilicon-containing material comprises an organosilicon-containing substance free of functional groups attached to carbon and essentially free of alkali metal ions, having atoms bonded directly to silicon all of which atoms are selected from O, N, and/or Cl. The organosilicon-containing substance additionally has moieties directly bonded to organosilicon which are displaceable by reaction with water and/or alcohol. The reaction product is not capable of being gelled when subjected to a specific three-step gel test, has a ratio of milliequivalents of residual moieties from the organosilicon-containing material which are displaceable by reaction with water and/or alcohol to milliequivalents of hydroxyl moieties from the polyol greater than 1, and is capable of self-curing to a continuous film in the presence of moisture.
    Type: Grant
    Filed: January 31, 1983
    Date of Patent: May 1, 1984
    Assignee: PPG Industries, Inc.
    Inventors: Wen-Hsuan Chang, David T. McKeough, John R. Peffer
  • Patent number: 4430486
    Abstract: Ungelled reaction products of a urethane resin having acrylyl groups with an amino silane are formed. The products are capable of curing at a low temperature to form durable coatings. Polyols can optionally be blended with the ungelled reaction products to provide useful coating compositions.
    Type: Grant
    Filed: November 29, 1982
    Date of Patent: February 7, 1984
    Assignee: PPG Industries, Inc.
    Inventors: Wen-Hsuan Chang, Robert Piccirilli, Walter F. Kasper
  • Patent number: 4429082
    Abstract: Ungelled reaction products of a condensation product with an amino silane are formed. The products are capable of curing at a low temperature to form durable coatings. Polyols can optionally be blended with the ungelled reaction products to provide useful coating compositions.
    Type: Grant
    Filed: May 10, 1982
    Date of Patent: January 31, 1984
    Assignee: PPG Industries, Inc.
    Inventors: Kyu-Wang Lee, John R. Peffer, Robert Piccirilli, Wen-Hsuan Chang
  • Patent number: 4419407
    Abstract: High solids thermosetting elastomeric coating compositions are disclosed. The resinous binder of the coating compositions is based on a hard polyester polyol containing cyclic moieties plasticized with a soft polyurethane polyol and cured with a curing agent capable of reacting with active hydrogens, for example, an aminoplast curing agent. The coating compositions are particularly useful on elastomeric substrates such as high density polyurethane foams, as well as on metal substrates such as steel and aluminum.
    Type: Grant
    Filed: January 29, 1982
    Date of Patent: December 6, 1983
    Assignee: PPG Industries, Inc.
    Inventors: Robert M. Piccirilli, Wen-Hsuan Chang, Samuel Porter, Jr., James B. O'Dwyer, Kyu-Wang Lee
  • Patent number: 4417022
    Abstract: Coating compositions capable of liquid application to substrates consist essentially of a curable film forming polyol-containing component and an organic reactive diluent. The reactive diluent is an organic compound containing a primary or secondary hydroxyl group and further characterized by having a retained solids value of greater than about 80 percent, a hydroxyl equivalent weight of from about 180 to about 800, and a liquid viscosity of less than about 10 poise at 60.degree. C. The coating compositions can be formulated to contain little or no volatile organic solvent and/or water.
    Type: Grant
    Filed: April 2, 1982
    Date of Patent: November 22, 1983
    Assignee: PPG Industries, Inc.
    Inventors: Wen-Hsuan Chang, James B. O'Dwyer, John R. Peffer
  • Patent number: 4413086
    Abstract: Described are water reducible coating compositions comprising (A) an organosilane-polyol which is the reaction product of a hydrophilic polycarbinol and an organosilicon material selected from the group consisting of an organosilane, a hydrolyzed and condensed organosilane and mixture, thereof; and (B) a curing agent for the coating compositions.
    Type: Grant
    Filed: March 4, 1982
    Date of Patent: November 1, 1983
    Assignee: PPG Industries, Inc.
    Inventors: Wen-Hsuan Chang, Kyu-Wang Lee, John B. Saunders, Jr.
  • Patent number: 4410668
    Abstract: Thermosetting elastomeric coating compositions are disclosed. The resinous binder of the coating compositions is based on a hard polyester polyol containing cycloaliphatic moieties plasticized with a soft polyurethane polyol and cured with a curing agent capable of reacting with active hydrogens, for example, an aminoplast curing agent. The coating compositions are particularly useful on elastomeric substrates such as high density polyurethane foams, as well as on metal substrates such as steel and aluminum.
    Type: Grant
    Filed: January 29, 1982
    Date of Patent: October 18, 1983
    Assignee: PPG Industries, Inc.
    Inventors: Robert M. Piccirilli, Wen-Hsuan Chang, Samuel Porter, Jr., James B. O'Dwyer, Kyu-Wang Lee
  • Patent number: 4410667
    Abstract: Thermosetting elastomeric coating compositions are disclosed. The resinous binder of the coating compositions is based on a hard polyester polyol containing cyclic moieties plasticized with a blend of soft polyurethane polyols, one of which has a high molecular weight and one of which has a low molecular weight, and cured with a curing agent capable of reacting with active hydrogens, for example, an aminoplast curing agent. The coating compositions are resistant to solvent popping and are particularly useful on elastomeric substrates such as high density polyurethane foams, as well as on metal substrates such as steel and aluminum.
    Type: Grant
    Filed: January 29, 1982
    Date of Patent: October 18, 1983
    Assignee: PPG Industries, Inc.
    Inventors: Samuel Porter, Jr., Robert M. Piccirilli, Wen-Hsuan Chang, James B. O'Dwyer, Kyu-Wang Lee
  • Patent number: 4343925
    Abstract: Coating compositions capable of liquid application to substrates consist essentially of a curable film forming polyol-containing component and an organic reactive diluent. The reactive diluent is an organic compound containing a primary or secondary hydroxyl group and further characterized by having a retained solids value of greater than about 80 percent, a hydroxyl equivalent weight of from about 180 to about 800, and a liquid viscosity of less than about 10 poise at 60.degree. C. The coating compositions can be formulated to contain little or no volatile organic solvent and/or water.
    Type: Grant
    Filed: December 7, 1979
    Date of Patent: August 10, 1982
    Assignee: PPG Industries, Inc.
    Inventors: Wen-Hsuan Chang, James B. O'Dwyer, John R. Peffer
  • Patent number: 4332329
    Abstract: An implosion-protected evacuated glass enclosure such as a cathode ray tube or an electric lamp is disclosed. The enclosure is made implosion resistant by depositing on the exterior surface thereof a polyurethane film. The mechanical properties of the polyurethane film result in outstanding glass retention properties when the evacuated glass enclosure implodes.
    Type: Grant
    Filed: October 25, 1977
    Date of Patent: June 1, 1982
    Assignee: PPG Industries, Inc.
    Inventors: Roger L. Scriven, Wen-Hsuan Chang
  • Patent number: 4314923
    Abstract: Coating compositions are formulated using a polyol with a hydroxyl functionality of at least three modified by reaction with a glycidyl ether in proportion of about 0.1 to about 4, preferably from about 0.2 to about 2 moles of glycidyl ether per mole of polyol, with which is combined, as curing agent, a compatible aminoplast resin. When the polyol is trimethylol ethane, for example, and is so modified with allyl or butyl glycidyl ether, for example, and is so modified with allyl or butyl glycidyl ether, for example, and the compositions contain a methylated melamine formaldehyde condensate as curing agent, they are especially suitable for clear top coating surfaces of wood or flat woodstock containing printing inks to simulate woodgrain, to provide a durable coating highly adherent to the inks as well as the cellulosic materials. The compositions may contain high solids content yet they are stable on storage without development of crystallization and are reducible or thinnable with water.
    Type: Grant
    Filed: June 4, 1980
    Date of Patent: February 9, 1982
    Assignee: PPG Industries, Inc.
    Inventors: Wen-Hsuan Chang, Robert Piccirilli, David A. Diehl
  • Patent number: 4313968
    Abstract: A method of applying a coating composition, which preferably has a high solids content, to a workpiece. The method is one wherein a coating composition is atomized into liquid particles, an electrical charge is imparted with an induction charging electrode means on the particles substantially simultaneously with their formation, and the charged particles are directed to an electrically-receptive workpiece, and includes the improvement comprising heating the coating composition to adjust its conductivity and to enhance the induction charging of the particles formed from the heated coating composition. In a preferred embodiment, the charged particles are cooled before they reach the workpiece.
    Type: Grant
    Filed: November 14, 1979
    Date of Patent: February 2, 1982
    Assignee: PPG Industries, Inc.
    Inventors: James E. Sickles, Wen-Hsuan Chang
  • Patent number: 4260716
    Abstract: Quaternary ammonium hydroxide-containing polymers and their use in coating applications are disclosed. The quaternary ammonium hydroxide-containing polymers are prepared from reacting a polyglycidyl ether of a cyclic polyol with a tertiary amine in the presence of a sufficient amount of water for the formation of quaternary hydroxide groups.The quaternary ammonium hydroxide-containing polymers are particularly good as electrocoating resins in that they electrodeposit without generating acid counterion. They are also good in other conventional coating applications such as dip, flow, spray and roll coating in that the resulting coating can be baked without the generation of corrosive acid.
    Type: Grant
    Filed: May 7, 1979
    Date of Patent: April 7, 1981
    Assignee: PPG Industries, Inc.
    Inventors: Roger M. Christenson, Joseph F. Bosso, Marvis E. Hartman, Wen-Hsuan Chang
  • Patent number: 4218355
    Abstract: Low organic solvent-containing coating compositions are prepared by blending (i) an ester-containing polyol, having a number average molecular weight of from about 140 to about 700, a hydroxyl value of from about 160 to about 1100 and a viscosity of less than about 1200 poises, which is derived from an aromatic or alicyclic monobasic acid and, optionally, a minor proportion of a polybasic acid and a polyol having an average hydroxyl functionality of from about 2.1 to about 5.0 with (ii) an aminealdehyde crosslinking agent. Particularly valuable coating compositions which can be cured at relatively low temperatures are obtained by incorporating a cure accelerating catalyst into the composition. The compositions aid in environmental pollution control and form films having good adhesion, flexibility, hardness, stain resistance, detergent resistance, solvent resistance and durability.
    Type: Grant
    Filed: July 21, 1978
    Date of Patent: August 19, 1980
    Assignee: PPG Industries, Inc.
    Inventors: Wen-Hsuan Chang, John R. Peffer, Ronald J. Lewarchik
  • Patent number: 4208495
    Abstract: Cured coatings having a high degree of extensibility, gloss retention, good sprayability and other desirable properties are obtained from compositions comprising (A) an interpolymer of a hydroxyalkyl ester of an ethylenically-unsaturated carboxylic acid and a copolymerizable material; (B) an organic polyisocyanate; (C) a polymeric polyol of low glass transition temperature; and (D) a curing agent, present either externally and/or as a part of the interpolymer. These compositions, when used as coatings, are durable, adherent and highly extensible. The coatings are particularly useful on resilient and rubbery substrates such as EPDM rubber, foam rubber, polyurethane foam and vinyl foam and on soft metal surfaces such as steel and aluminum.
    Type: Grant
    Filed: November 29, 1978
    Date of Patent: June 17, 1980
    Assignee: PPG Industries, Inc.
    Inventors: Wen-Hsuan Chang, J. Alden Erikson, Samuel Porter, Jr.
  • Patent number: 4208494
    Abstract: Cured coatings having a high degree of extensibility, gloss retention, good sprayability and other desirable properties are obtained from compositions comprising (A) an interpolymer of a hydroxyalkyl ester of an ethylenically-unsaturated carboxylic acid and a copolymerizable material; (B) an organic polyisocyanate; (C) a polymeric polyol of low glass transistion temperature; and (D) a curing agent, present either externally and/or as a part of the interpolymer. These compositions, when used as coatings, are durable, adherent and highly extensible. The coatings are particularly useful on resilient and rubbery substrates such as EPDM rubber, foam rubber, polyurethane foam and vinyl foam and on soft metal surfaces such as steel and aluminum.
    Type: Grant
    Filed: November 29, 1978
    Date of Patent: June 17, 1980
    Assignee: PPG Industries, Inc.
    Inventors: Wen-Hsuan Chang, J. Alden Erikson, Samuel Porter, Jr.