Patents Represented by Attorney, Agent or Law Firm Hilmar L. Fricke
  • Patent number: 6652971
    Abstract: The invention relates to hydroxy-functional (meth)acrylic copolymers having an OH value from 40 to 260 mg KOH/g, a number average molecular mass (Mn) from 1500 to 20000 g/mole and a glass transition temperature Tg from −40° C. to 80° C., containing A) polymerized monomers of at least one epoxy-functional, olefinically unsaturated monomer, B) at least one compound having a carboxyl group and at least one hydroxyl group in the molecule that is reacted with the epoxy functional group of the polymerized olefincially unsaturated monomers, C) at least one additional polymerized olefinically unsaturated monomer capable of radical polymerization which is different from component A) and D) optionally at least one lactone reacted with the polymer. It also relates to processes for making the copolymers and to coating compositions that contain the hydroxy-functional (meth)acrylic copolymers and to the use thereof in multi-layer automotive coatings.
    Type: Grant
    Filed: October 30, 2000
    Date of Patent: November 25, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Ann Delmotte, Josef Huybrechts, Hermann Kerber, Olaf Ley, Harold Paulussen, Ann Vaes
  • Patent number: 6649672
    Abstract: Binders suitable for coating compositions, obtainable by reaction of one or more epoxy-functional binders with carboxyl-functional nanoparticles, and coating compositions containing them and the use thereof.
    Type: Grant
    Filed: March 20, 2002
    Date of Patent: November 18, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Volker Dücoffre, Carmen Flosbach, Klaus Tännert, Petra Weidenhammer
  • Patent number: 6618050
    Abstract: A process for generating a computer image of a three-dimensional object provided with a special-effect coating, involves coating a test panel with the coating, taking a plurality of angle-dependent colorimetric measurements of the coating; storing the calorimetric data in a datafile with assignment of the corresponding angles; facetting the visible surfaces of a three-dimensional object by computer into a sufficient number of flat polygonal areas each being sufficiently small for the sufficiently accurate description of the surface topography; assigning the colorimetric data to each individual polygonal area by computer as a function of the position of an observer and at least one illumination source; and assembling the polygonal areas into a computer image of a three-dimensional object with a visually perceptible special-effect coating thereon.
    Type: Grant
    Filed: November 27, 2000
    Date of Patent: September 9, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Paul Rupieper, Christian Voye
  • Patent number: 6607424
    Abstract: A composition is provided which is useful for the polishing of a semiconductor wafer substrate comprising an organic polymer having a backbone comprised of at least 16 carbon atoms, the polymer having a plurality of moieties with affinity to surface groups on the semiconductor wafer surface. Another composition is provided which is useful for the polishing of a semiconductor wafer substrate comprising a surfactant having a carbon chain backbone comprised of at least 16 carbon atoms.
    Type: Grant
    Filed: August 22, 2000
    Date of Patent: August 19, 2003
    Assignee: Rodel Holdings, Inc.
    Inventors: Wesley D. Costas, James Shen, Glenn C. Mandigo, Terence M. Thomas, Craig D. Lack, Ross E. Barker, II
  • Patent number: 6284850
    Abstract: Free radically polymerizable monomers may be polymerized using as an initiator a combination of a selected arylsulfonyl halide or alkylsulfonyl halide and a selected compound containing a lower valent transition metal atom. These polymerizations are sometimes living polymerizations, allowing control of polymer structure such as producing block copolymers and/or polymers with narrow molecular weight distributions. Useful monomers include styrenes and (meth)acrylate esters and amides. The products are useful as molding resins, for glazing, as film forming binders in coating compositions and have numerous other uses.
    Type: Grant
    Filed: April 29, 1999
    Date of Patent: September 4, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Virgil Percec
  • Patent number: 6204319
    Abstract: An aqueous coating composition containing: (a) an aqueous carrier medium: (b) a pigment having a pH below 7.0; (c) an AB block copolymer pigment dispersant resin of (1) an A block of a hydrophobic polymer having amine groups; and (2) a B block of a hydrophilic polymer having hydroxyl groups and carboxyl groups; the AB block copolymer has a number average molecular weight of 5,000-20,000 and contains 20-80% by weight of a polymeric A segment and correspondingly 80-20% by weight of a polymeric B segment; wherein the pigment and the dispersant are present in a pigment to dispersant weight ratio of 0.1/1-20/1; (d) a film forming polymeric binder containing carboxyl groups and (e) a crosslinking agent which on curing of the coating composition will react with the carboxyl and hydroxyl groups of the AB block copolymer and the carboxyl groups of the film forming polymeric binder. Pigment dispersions of the AB block copolymer and process for forming the dispersions also are part of this invention.
    Type: Grant
    Filed: October 30, 1998
    Date of Patent: March 20, 2001
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Eric Charles Houze, Patrick F. McIntyre, Harry J. Spinelli, Ayumu Yokoyama
  • Patent number: 6187854
    Abstract: A pigment dispersion useful for forming coating compositions containing dispersed pigment, a carrier liquid and an AB-block polymer dispersant (binder); the AB block polymer has a number average molecular weight of about 5,000-20,000 and contains 20-80% by weight of a polymeric A segment and correspondingly 80-20% by weight of a polymeric B segment; wherein the polymeric A segment of the block polymer is of polymerized glycidyl (meth)acrylate monomers reacted with an acid from the group of aromatic carboxylic acids or aliphatic carboxylic acids; and the B segment is of polymerized alkyl (meth)acrylate monomers having 1-12 carbon atoms in the alkyl group, hydroxy alkyl (meth)acrylate monomers having about 1-4 carbon atoms in the alkyl group; and wherein the weight ratio of pigment to binder in the dispersion is about 1/100-200/100.
    Type: Grant
    Filed: August 19, 1998
    Date of Patent: February 13, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Harry J. Spinelli, Henry L. Jakubauskas, Patrick F. McIntyre, James G. King
  • Patent number: 6156823
    Abstract: An improved aqueous cathodic electrocoating composition having a binder of an epoxy-amine adduct and a blocked polyisocyanate crosslinking agent; wherein the improvement is the use of a catalytic amount of bismuth trioxide dispersed in the electrocoating composition.
    Type: Grant
    Filed: December 4, 1998
    Date of Patent: December 5, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Robert John Sikora
  • Patent number: 6123822
    Abstract: An improved aqueous cathodic electrocoating composition having a binder of an epoxy-amine adduct which is an epoxy resin that has been reacted with an amine, a blocked polyisocyanate crosslinking agent and an organic or inorganic acid as the neutralizing agent for the epoxy amine adduct; where the improvement is a catalyst of an alkyl tin oxide that has been dissolved with an organic or inorganic acid to provide a clear cathodic electrocoating composition.
    Type: Grant
    Filed: December 9, 1998
    Date of Patent: September 26, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Ding-Yu Chung, Yuehua Liu
  • Patent number: 6037414
    Abstract: A polymeric pigment dispersant of a graft polymer having an acrylic polymer backbone and pending from the backbone, polyester side chains, cyclic imide groups and quaternary ammonium groups and the polymer having a calculated number average molecular weight of 8,000-50,000; wherein the graft copolymer is composed of(a) 10-50%, by weight of the of the graft polymer, of an acrylic copolymer backbone having a number average molecular weight of 2500-10,000 which, before reaction, contains 25-75% by weight of polymerized oxirane containing monomers;(b) 20-85%, by weight of the graft polymer, of a polyester copolymer, or mixture of different polyester copolymers, having a number average molecular weight of 500-10,000 which polyester copolymer is carboxylic-acid functional and is attached to the backbone by a reaction of the carboxylic acid functional group with oxirane group of the backbone;(c) 1-16%, by weight of the graft polymer, of cyclic imide groups attached to the backbone by a reaction of the imide group wi
    Type: Grant
    Filed: September 2, 1998
    Date of Patent: March 14, 2000
    Assignee: E. I. du Pont Nemours and Company
    Inventors: John A. Simms, Aleksandr Sorser
  • Patent number: 6031039
    Abstract: An anti-static composition comprising (a) 65-99% by weight of a polyoxymethylene polymer; (b) 1-10% by weight of carbon fiber and, optionally, (c) 0-20% by weight of additive compounds. The invention further relates to a process for preparing such a composition and to molded articles comprising such a composition.
    Type: Grant
    Filed: September 16, 1997
    Date of Patent: February 29, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Johannes Evert Aloisius Koppen
  • Patent number: 6027152
    Abstract: An ergonomic carrying device for transporting containers having: a top crossmember having two ends; a first leg member attached to the top crossmember and depending from the top crossmember, and a second leg member attached to and depending from the top crossmember; a backbrace member attached to the first and second leg members and extending therebetween; a bail hook attached to the crossmember at a point between the two ends of the top crossmember; and at least two handles attached at or near each of the two ends of the top crossmember.
    Type: Grant
    Filed: December 9, 1998
    Date of Patent: February 22, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: David J. Sawdey
  • Patent number: 6020069
    Abstract: An improved aqueous cathodic electrocoating composition of an aqueous carrier having dispersed therein a film forming binder of (1) an epoxy-resin amine adduct and (2) a blocked polyisocyanate crosslinking agent; wherein the improvement is an epoxy resin amine adduct which is a reaction product of an epoxy resin and a polyhydric phenol which is chain extended with a primary amine to form a chain extended epoxy resin having epoxy end groups and an equivalent amine to epoxy ratio is 1-10 to 4-10 and wherein the epoxy end groups of the resin are reacted with a ketimine and/or a diamine and the resulting chain extended epoxy resin has an epoxy equivalent weight of about 700-2,000 and is neutralized with an organic or inorganic acid; wherein the electrocoating composition has improved throw power and forms coatings that have improved corrosion resistance in comparison to conventional electrocoating compositions formed from epoxy resins extended with conventional diamines or polyols.
    Type: Grant
    Filed: June 18, 1998
    Date of Patent: February 1, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Joseph A. Antonelli, Christopher Scopazzi
  • Patent number: 5985463
    Abstract: A coating composition particularly useful as a clear coating used over a pigmented base coat that has improved resistance to marring and to acid etching when exposed to natural weathering conditions containing 40-70% by weight of film forming binder and 30-60% by weight of a volatile liquid carrier for the binder; wherein the binder containsa.
    Type: Grant
    Filed: June 24, 1998
    Date of Patent: November 16, 1999
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Jun Lin, John David Nordstrom
  • Patent number: 5955532
    Abstract: This invention is directed to an aqueous coating composition containing about 40-90% by weight, based on the weight of the coating composition, of an aqueous carrier and 10-60% by weight, based on the weight of the coating composition, of a binder of(a) about 50 to 98%, based on the weight of the binder, of a crosslinked graft copolymer comprising:(i) 2 to 98%, based on the weight of the graft copolymer, of a polymeric backbone of polymerized mono ethylenically unsaturated monomers and 0.5-10.
    Type: Grant
    Filed: July 17, 1997
    Date of Patent: September 21, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: David C.K. Chang, Michael Fryd
  • Patent number: 5948851
    Abstract: A coating composition that forms a finish that is soil resistant and easily cleaned having a binder of(A) an acrylic polymer of polymerized hydroxyl containing monomers of hydroxy alkyl (meth)acrylate having 1-4 carbon atoms in the alkyl group, and polymerized monomers from the group of alkyl (meth)acrylates having 1-18 carbon atoms in the alkyl group, styrene or any mixtures of the above and the acrylic polymer having a weight average molecular weight of about 2,000-20,000 determined by gel permeation chromatography,(B) an acrylic polymeric additive of polymerized monomers from the group of alkyl (meth)acrylates having 1-18 carbon atoms in the alkyl groups, styrene or any mixtures of the above, and polymerized fluoro alkyl containing monomer represented by the formula ##STR1## where R is selected from the group of hydrogen or an alkyl group having 1-2 carbon atoms, X is a divalent radical and R.sub.
    Type: Grant
    Filed: November 21, 1997
    Date of Patent: September 7, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Douglas Robert Anton, Michael J. Darmon, William Frank Graham, Richard Ronald Thomas
  • Patent number: 5942175
    Abstract: A process and apparatus for molding recyclable cushions is disclosed. The cushions are molded by a process comprising filling a mold with polyester fiber clusters, encapsulating the fibers clusters with a scrim sheet or adhesive, closing the mold, advancing the mold to a heating station where hot air is forced through the mold, advancing the mold to a cooling station where cool air is forced through the mold, and subsequently releasing the molded part from the mold.
    Type: Grant
    Filed: September 6, 1996
    Date of Patent: August 24, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Thomas A. Curran, William G. Johanson, Nathan W. Ladley, O'Dell Scarborough
  • Patent number: 5914384
    Abstract: A coating composition that forms a finish that is soil resistant and easily cleaned having a binder of(A) an acrylic polymer of polymerized hydroxyl containing monomers of hydroxy alkyl (meth)acrylates having 1-4 carbon atoms in the alkyl groups and polymerized monomers from the group of alkyl (meth)acrylates having 1-18 carbon atoms in the alkyl groups, styrene or any mixtures of the above and the acrylic polymer has a weight average molecular weight of about 2,000-20,000 determined by gel permeation chromatography,(B) an acrylic polymeric additive of polymerized hydroxyl containing monomers of hydroxy alkyl (meth)acrylates having 1-4 carbon atoms in the alkyl groups, polymerized monomers from the group of alkyl (meth)acrylates having 1-18 carbon atoms in the alkyl groups, styrene or any mixtures of the above and polymerized fluoro alkyl containing monomer represented by the formula ##STR1## where R is selected from the group of hydrogen or an alkyl group having 1-2 carbon atoms, X is a divalent radical and
    Type: Grant
    Filed: November 21, 1997
    Date of Patent: June 22, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Douglas Robert Anton, Michael J. Darmon, William Frank Graham, Richard Ronald Thomas
  • Patent number: 5908910
    Abstract: An improved aqueous electrocoating composition that contains an anticrater agent which is a reaction product of polyoxyalkylene diamine and isocyanto alkyl alkoxy silane which is hydrolyzed and has a number average molecular weight of about 2,000-5,000; electrodeposited finishes are formed that have a significant reduction in craters and are smooth and even finishes.
    Type: Grant
    Filed: December 22, 1997
    Date of Patent: June 1, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Allisa Gam
  • Patent number: 5886075
    Abstract: A process for preparing polyvinylbutyral sheet having a desired uniform adhesivity comprising preparing a blend of polyvinylbutyral and a compatible quantity of a at least one plasticizer and an adhesion control agent, and extruding the blend to form a sheet, the improvement comprising monitoring the acidity of the sheet and adding water to the blend as an agent for controlling the adhesivity of said sheet.
    Type: Grant
    Filed: September 12, 1997
    Date of Patent: March 23, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: John J. Keane, Ray V. Foss, Edward W. Hussey