Patents Represented by Attorney James A. Costello
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Patent number: 6316519Abstract: Synthesis of linear acrylic polymers and copolymers having controlled molecular weight by the photoinitiated free radical polymerization of vinyl monomers in the presence of chain transfer agents to produce polymers useful in coating compositions and the like, including printing inks.Type: GrantFiled: August 19, 1999Date of Patent: November 13, 2001Assignee: E. I. du Pont de Nemours and CompanyInventors: Charles Thomas Berge, Vincent Desobry
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Patent number: 6291620Abstract: Process for the synthesis of block polymers, homopolymers and copolymers of narrow polydispersity having formula (1) by contacting selected vinyl monomer(s), vinyl-terminated compound(s) and free radicals in which effective control of production of polymer is achieved by controlling the mole ratio of vinyl monomer(s), vinyl-terminated compound(s) and free radicals relative to one another; and polymers produced therebyType: GrantFiled: November 20, 1997Date of Patent: September 18, 2001Assignees: E. I. du Pont de Nemours and Company, Commonwealth Scientific Industrial Research OrganizationInventors: Graeme Moad, Catherine Louise Moad, Julia Krstina, Ezio Rizzardo, Thomas Robert Darling, Charles Thomas Berge
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Patent number: 6277497Abstract: A high solids coating composition comprising a branched hydroxy-functional polyester oligomer and a curing agent; and the oligomer itself containing at least 20% by weight of the binder of at least one of the following tertiary acid ester end groups: where R1, R2 and R3 are independently selected from CH3 and CH2OH; the composition being suitable as an automobile clearcoat or pigmented topcoat.Type: GrantFiled: January 14, 2000Date of Patent: August 21, 2001Assignee: E. I. du Pont de Nemours and CompanyInventors: Armand Aerts, Anne Demarre, Jozef Huybrechts, G. Todd Palmer
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Patent number: 6271340Abstract: This invention concerns the preparation of polymers of low polydispersity and/or controlled molecular weight and architecture employing living free radical polymerization initiated by an alkoxyamine initiator or nitroxide plus, optionally a free radical initiator, the polymer produced thereby; selected nitroxide and alkoxyamine initiators; and a process for making the initiators; the polymeric products being useful in protective coatings.Type: GrantFiled: November 5, 1999Date of Patent: August 7, 2001Assignees: E. I. du Pont de Nemours and Company, Commonwealth Scientific & Industrial Research OrganizationInventors: Albert G. Anderson, Alexei Gridnev, Graeme Moad, Ezio Rizzardo, San Hoa Thang
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Patent number: 6268456Abstract: A sprayable coating composition that contains at least one soluble film-forming silicon-containing compound having, on average, more than one fuctionalized silicon group, a volatile organic carrier, a polymer microparticle component, and a catalyst; a substrate coated with the composition; a process for coating the substrate to provide a protective finish; the finish-protected substrate; certain oligomeric compounds and a process therefor.Type: GrantFiled: December 3, 1997Date of Patent: July 31, 2001Assignee: E. I. du Pont de Nemours and CompanyInventors: Basil V. Gregorovich, Isidor Hazan, Robert Rudolph Matheson, Lech Wilczek
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Patent number: 6239214Abstract: The invention concerns a graft copolymer emulsion which is anionically stabilized and which contains an amino-functional monomer. The graft copolymer, useful in a coating composition, has a weight average molecular weight of at least about 3,000 and comprises 20 to 95 weight percent of a polymer backbone and 5 to 80 weight percent of a macromonomer. The polymer backbone further comprises 0.5 to 30 weight percent of an amino-functional monomer and the macromonomer comprises at least about 5 weight percent of an unsaturated acid-functional monomer.Type: GrantFiled: January 14, 2000Date of Patent: May 29, 2001Assignee: E. I. du Pont de Nemours and CompanyInventors: Josef Huybrechts, Peter Paul Bruylants, Anne De Marre
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Patent number: 6197905Abstract: A process for the production of polymers by free radical polymerization, characterized in that there is added to the polymerization system one or more compounds of general formula (A), where R1 is a group capable of activating the vinylic carbon towards free radical addition; Y is OR2, where R2 is an optionally substituted alkyl, optionally substituted alkenyl, optionally substituted alkynyl, or optionally substituted saturated or unsaturated carbocyclic or heterocyclic ring; X is an element other than carbon selected from the Groups, IV, V, VI or VII of the Periodic Table or a group consisting of an element selected from the Groups IV, V, or VI to which is attached one or more oxygen atoms; and n is a number from 0 to 3, such that the valency of the group X is satisfied and, when n is greater than 1, the groups represented by R2 are identical or different.Type: GrantFiled: March 21, 1997Date of Patent: March 6, 2001Assignee: Commonwealth Scientific & Industrial Resarch OrganizationInventors: Ezio Rizzardo, Gordon Francis Meijs, San Hoa Thang
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Patent number: 6156114Abstract: A method for treating the surface of substantially each deagglomerated particle of an array of easily agglomerated particles by contacting deagglomerated particles with a plasma-activated gas species and modifying the surfaces of the deagglomerated particles to aid subsequent incorporation of the particles into a matrix composition; the module for deagglomerating and dispersing the particles into the plasma-activated gas; the apparatus that comprises the deagglomeration module (322) and a reaction chamber (20) in which the particles are treated with the plasma-activated gas; the method for deagglomerating particles that may reagglomerate after plasma treatment; and a color composition containing plasma-treated pigment particles.Type: GrantFiled: August 4, 1998Date of Patent: December 5, 2000Assignee: E. I. du Pont de Nemours and CompanyInventors: Timothy Allan Bell, Wronald Scott Best, Michael Patrick Chouinard, Paul Francis Herman, James Lewis Hohman, Jr., Laurence J. Levase, Tyau-Jeen Lin, An-Gong Yeh, Thomas William Harding
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Patent number: 6146703Abstract: A method for producing coating composition exhibiting sprayability at low VOC and excellent performance characteristics as a coating is disclosed. The composition is based on low molecular weight anhydride resin having pendant non-cyclic anhydride moieties and epoxy resin. The composition includes an active catalyst for controlling the volatility of the coating during cure. The composition also includes a surface tension reducing agent that wets the surface during coating application.Type: GrantFiled: September 17, 1997Date of Patent: November 14, 2000Assignee: E. I. du Pont de Nemours and CompanyInventors: Robert J. Barsotti, Jeffery W. Johnson
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Patent number: 6107392Abstract: An aqueous coating composition comprising a dispersed graft copolymer characterized by macromonomers attached at a terminal end thereof to a polymeric backbone which is acid functional, wherein the functional groups have been neutralized. Such compositions provide improved properties for an automotive finish.Type: GrantFiled: September 12, 1997Date of Patent: August 22, 2000Assignee: E. I. du Pont de Nemours and CompanyInventors: Joseph Albert Antonelli, Robert J Barsotti, Lee Edwin Allen Becton, Christopher Scopazzi
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Patent number: 6100350Abstract: This invention relates to a process for the synthesis of addition polymers containing branches upon branches and having a polymerizable olefin end group by a convenient one-pot copolymerization of selected vinyl monomers with chain polymerization initiators and a method to provide olefin end groups by chain transfer or termination agents; and polymers produced thereby.Type: GrantFiled: August 19, 1998Date of Patent: August 8, 2000Assignees: E. I. du Pont de Nemours and Company, Commonwealth Scientific and Industrial Research OrganizationInventors: Lech Wilczek, Elizabeth Forrester McCord
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Patent number: 6080816Abstract: A coating comprising the silated reaction product of R.sup.1 (OH).sub.m and OCN(CH.sub.2).sub.t SiR.sup.4 (OR.sup.5).sub.2 and/or R.sup.2 --(SiYX.sub.2).sub.n ; a graft copolymer having an acrylic polymer based backbone and stabilizing arms comprising ethylenically unsaturated monomer, the backbone being insoluble and the arms being soluble in the composition; a melamine crosslinker; and an acrylic polyol; m, n, t, R.sup.1, R.sup.2 R.sup.4, R.sup.5, X and Y being defined in the text.Type: GrantFiled: November 10, 1997Date of Patent: June 27, 2000Assignee: E. I. du Pont de Nemours and CompanyInventors: Basil V. Gregorovich, Isidor Hazan, Lech Wilczek
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Patent number: 6020034Abstract: This invention concerns a process for imparting corrosion and creep resistance to a coating prepared from a particulate polymer composition and applied from a fluidized bed or by electrostatic spraying over metal substrates. The process of the present invention provides for maintaining the content of acid functionality of an acid-functionalized semicrystalline or acid-functionalized amorphous particulate polymer of the particulate polymer composition within a desired range. The acid functionality on the particulate polymer can be maintained, by crosslinking and/or neutralizing, within a desired range of the acid content which results in imparting corrosion and creep resistance to the coating applied over the metal substrates. Neutralizing the acid functionality of the polymer component results in hardening the coatings resulting therefrom. The process further provides for adding anticorrosive pigments to the composition for further improving corrosion resistance of the resultant coatings.Type: GrantFiled: November 14, 1997Date of Patent: February 1, 2000Assignee: E. I. du Pont de Nemours and CompanyInventors: Rashi Akki, Basil V. Gregorovich, George K. Kodokian, George W. Prejean
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Patent number: 5985956Abstract: An organic solvent-containing coating composition useful as a finish for automobiles and trucks in which the film-forming binder comprises a component having at least two acid groups, a polymer having both epoxy and silane functionality and an acrylic-core polymer having stabilizer components soluble in the solvent.Type: GrantFiled: August 13, 1997Date of Patent: November 16, 1999Assignee: E. I. du Pont de Nemours and CompanyInventors: Robert John Barsotti, Ying Kao Lee, Laura Ann Lewin
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Patent number: 5977278Abstract: The present invention relates to polymers having the formula: ##STR1## wherein: M, Q, X, Y, Z, R.sup.3 and R.sup.4 are as defined in the text.Type: GrantFiled: May 7, 1998Date of Patent: November 2, 1999Assignees: E. I. du Pont de Nemours and Company, Commonwealth Scientific and Industrial Research OrganisationInventors: Ezio Rizzardo, San Hoa Thang, Graeme Moad, Charles T. Berge
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Patent number: 5977256Abstract: A coating composition comprising a crosslinkable binder in an organic solvent, the binder composed of acrylic and polyester polyols plus a crosslinking agent, the polyester polyol containing a component derived from one or both of: a residue of dimer fatty acid and polyol, or residue of a polyacid and dimer alcohol, the composition being useful for coating metallic substrates.Type: GrantFiled: October 29, 1997Date of Patent: November 2, 1999Assignee: E.I. du Pont de Nemours and CompanyInventors: Jozef Huybrechts, Stuart Alexander Kernaghan, Robert Vervoort
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Patent number: 5936026Abstract: An aqueous coating composition comprising a graft copolymer characterized by carboxylic-acid or amine functional macromonomers attached at a terminal end thereof to a polymeric backbone, wherein the macromonomers are grafted in an aqueous carrier in which the carboxylic-acid or amine functional groups have been neutralized. Such compositions provide improved properties for an automotive finish.Type: GrantFiled: November 14, 1996Date of Patent: August 10, 1999Assignee: E. I. du Pont de Nemours and CompanyInventors: Jozef Huybrechts, Michael Fryd, Paul Bruylants, Kerstin Stranimaier
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Patent number: 5932667Abstract: Adducts of vinyldioxo compounds comprising a crosslinkable silyl-functional terminal group are disclosed. Such adducts are useful for preparing curable coating compositions.Type: GrantFiled: June 26, 1996Date of Patent: August 3, 1999Assignee: E. I. du Pont de Nemours and CompanyInventors: Basil V. Gregorovich, Isidor Hazan, Hisanori Omura
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Patent number: 5932675Type: GrantFiled: March 21, 1997Date of Patent: August 3, 1999Assignee: Commonwealth Scientific and Industrial Research OrganisationInventors: Ezio Rizzardo, Gordon Francis Meijs, San Hoa Thang
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Patent number: 5928577Abstract: Spherical particles of a copolymer composition comprising a crosslinker and/or coating additive(s) the particles being especially useful for coating various substrates; and an improved process for making such particles comprising forming the copolymer and unreacted crosslinker and/or other additives in a coating matrix.Type: GrantFiled: April 8, 1997Date of Patent: July 27, 1999Assignee: E. I. du Pont de Nemours and CompanyInventor: George Kevork Kodokian