Patents by Inventor Harry W. S. Hsieh
Harry W. S. Hsieh 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: 5238993Abstract: In one aspect, this invention is a primer comprising a solution of: (a) a polyester resin of a carboxylic acid and a glycol; (b) a polymethylene poly(phenyl isocyanate), diphenylmethane diisocyanate, or mixture thereof; and (c) a silane-containing moiety; in a solvent mixture comprising: (i) a high boiling polar solvent; (ii) an oxygenated solvent; and (iii) an aromatic solvent; wherein the weight ratio of (a):(b) is in the range of from about 0.25:1.0 to 2.0:1.0. In a second aspect, this invention is a primer comprising a solution of: (a) 5-50% of a polyester resin of a carboxylic acid and a glycol; (b) 5-50% of a polymethylene poly(phenyl isocyanate), diphenylmethane diisocyanate, or mixture thereof; (c) 0.1-50% of a silane-containing moiety; (d) 0.1-50% of a high boiling polar solvent; (e) 10-70% of an oxygenated solvent; and (f) 1-50% of an aromatic solvent.Type: GrantFiled: October 2, 1992Date of Patent: August 24, 1993Assignee: The Dow Chemical CompanyInventor: Harry W. S. Hsieh
-
Patent number: 5115086Abstract: In one aspect, this invention is a primer which comprises a solution of: (a) a polyester resin of a carboxylic acid and a glycol; and (b) a polymethylene poly(phenyl isocyanate), diphenylmethane diisocyanate, or mixture thereof; in a volatile solvent, wherein the weight ratio of (a):(b) is in the range of from about 0.25:1.0 to 2.0:1.0. In a second aspect, this invention is a primer which comprises a solution of: (a) 5-18 weight percent of a polyester resin of a carboxylic acid and a glycol; and (b) 6-17 weight percent of a polymethylene poly(phenyl isocyanate), diphenylmethane diisocyanate, or mixture thereof; in a volatile solvent. It has been discovered that the primer of the invention advantageously provides improved adhesion characteristics of metal-to-glass bonding when used to prime paint-coated metal substrates before the application of a urethane adhesive, particularly when used with a "fast cure" adhesive comprised of an isocyanate-functional prepolymer and dimorpholinediethyl ether.Type: GrantFiled: February 6, 1990Date of Patent: May 19, 1992Assignee: Essex Specialty Products, Inc.Inventor: Harry W. S. Hsieh
-
Patent number: 4780520Abstract: A moisture curable sealant having good stability in the absence of moisture and a rapid cure rate in the sole presence of atmospheric moisture, the sealant containing a polyurethane prepolymer having an isocyanate functionality between 2.3 and 3.0, an isocyanate content of about 1-4 percent by weight, and, admixed therewith as a catalyst, from 0.2 to 1.75 percent, by weight of the sealant, of dimorpholinodiethyl ether.Type: GrantFiled: September 9, 1987Date of Patent: October 25, 1988Assignee: Essex Specialty Products, Inc.Inventors: Sidky D. Rizk, Harry W. S. Hsieh, John J. Prendergast, Sr.
-
Patent number: 4758648Abstract: A moisture curable sealant having good stability in the absence of moisture and a rapid cure rate in the sole presence of atmospheric moisture, said sealant comprising a polyurethane prepolymer having an isocyanate functionality between 2.3 and 3.0, and, admixed therewith as a catalyst, from 0.2 to 1.75 percent, by weight of said sealant, of dimorpholinodiethyl ether.Type: GrantFiled: October 20, 1986Date of Patent: July 19, 1988Assignee: Essex Specialty Products, Inc.Inventors: Sidky D. Rizk, Harry W. S. Hsieh, John J. Prendergast, Sr.
-
Patent number: 4719267Abstract: A heat curable one package polyurethane resin composition adaptable to use for automotive seam sealing, particularly under high solids acrylic enamel paints, said composition comprising an isocyanate terminated polyurethane prepolymer having pendant epoxy groups along the polymer chain and the isocyanate groups of which are blocked by reaction with an oxime, and a curing agent having at least two active hydrogen atoms per molecule, such as a polyol, a polyamine, or a blocked polyamine.Type: GrantFiled: August 6, 1986Date of Patent: January 12, 1988Assignee: Essex Specialty Products, Inc.Inventors: Sidky Rizk, Harry W. S. Hsieh
-
Patent number: 4687533Abstract: Methods for bonding a material to a non-porous substrate such as glass using a moisture curable sealant composition comprising a filler and a polyurethane polymer having terminal isocyanate groups and pendant silane groups having at least one alkoxy group bonded to silicon.Type: GrantFiled: August 6, 1986Date of Patent: August 18, 1987Assignee: Essex Specialty Products, Inc.Inventors: Sidky D. Rizk, Harry W. S. Hsieh
-
Patent number: 4624996Abstract: A heat curable one package polyurethane resin composition adaptable to use for automotive seam sealing, particularly under high solids acrylic enamel paints, said composition comprising an isocyanate terminated polyurethane prepolymer the isocyanate groups of which are blocked by reaction with an oxime, and a curing agent having at least two active hydrogen atoms per molecule, such as a polyol, a polyamine, or a blocked polyamine.Type: GrantFiled: May 29, 1985Date of Patent: November 25, 1986Assignee: Essex Specialty Products, Inc.Inventors: Sidky D. Rizk, Harry W. S. Hsieh
-
Patent number: 4625012Abstract: Methods for making a moisture curable polyurethane polymer having terminal isocyanate groups and pendant alkoxysilane groups by reacting an isocyanatosilane adduct, having terminal isocyanate groups and at least one hydrolyzable alkoxy group bonded to silicon, with a polyisocyanate and a polyol; moisture curable polymers made by said methods; sealant compositions directly adherent to a non-porous substrate such as glass or metal without the use of a primer, said compositions comprising such a moisture curable polymer in combination with a filler; and methods for curing and using such sealant compositions.Type: GrantFiled: August 26, 1985Date of Patent: November 25, 1986Assignee: Essex Specialty Products, Inc.Inventors: Sidky D. Rizk, Harry W. S. Hsieh
-
Patent number: 4567107Abstract: What are disclosed are a poly(meth)acrylate polymer having pendant hydrolyzable alkoxysilane groups thereon prepared by reacting a poly(meth)acrylate polymer having pendant hydroxy groups thereon with an isocyanato functional alkoxysilane having 1 to 3 hydrolyzable lower alkoxy groups present on the silicon atom thereof; a substrate such as glass or aluminum having a tenacious coating thereon of such a polymer alone or in admixture with another, different, resinous binder component; such a substrate further having a resinous sealant composition applied over said tenacious coating as a primer; and methods for making such a polymer and such coated substrates.Type: GrantFiled: August 15, 1984Date of Patent: January 28, 1986Assignee: Essex Specialty Products, Inc.Inventors: Sidky D. Rizk, Harry W. S. Hsieh, Michael P. Mazzeo
-
Patent number: 4491650Abstract: What are disclosed are a poly(meth)acrylate polymer having pendant hydrolyzable alkoxysilane groups thereon prepared by reacting a poly(meth)acrylate polymer having pendant hydroxy groups thereon with an isocyanato functional alkoxysilane having 1 to 3 hydrolyzable lower alkoxy groups present on the silicon atom thereof; a substrate such as glass or aluminum having a tenacious coating thereon of such a polymer alone or in admixture with another, different, resinous binder component; such a substrate further having a resinous sealant composition applied over said tenacious coating as a primer; and methods for making such a polymer and such coated substrates.Type: GrantFiled: May 5, 1982Date of Patent: January 1, 1985Assignee: Essex Specialty Products, Inc.Inventors: Sidky D. Rizk, Harry W. S. Hsieh, Michael P. Mazzeo
-
Patent number: 4345053Abstract: What are disclosed are the method of making a moisture-curable silicon terminated organic polymer which comprises reacting a polyurethane prepolymer having terminal active hydrogen atoms with an isocyanato organosilane having at least one hydrolyzable alkoxy group bonded to silicon, silicon terminated organic polymers so produced, and moisture-curable sealant compositions comprising such a silicon terminated polymer.Type: GrantFiled: July 17, 1981Date of Patent: August 17, 1982Assignee: Essex Chemical Corp.Inventors: Sidky D. Rizk, Harry W. S. Hsieh, John J. Prendergast