Patents Represented by Attorney, Agent or Law Firm Hilmar L. Fricke
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Patent number: 5883276Abstract: An improved aqueous electrocoating composition that contains an anticrater agent which is a reaction product of polyoxyalkylene diamine and glycidoxy alkyl alkoxy silane which is hydrolyzed and has a number average molecular weight of about 700-5,000; electrodeposited finishes are formed that have a significant reduction in craters and are smooth and even finishes.Type: GrantFiled: October 22, 1997Date of Patent: March 16, 1999Assignee: E. I. du Pont de Nemours and CompanyInventors: Allisa Gam, Ding Yu Chung
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Patent number: 5877332Abstract: New adducts are produced from the reaction of vinyl dioxo compounds with anhydrides, epoxyesters, lactones, and lactams, and such adducts are useful for preparing curable coating compositions.Type: GrantFiled: October 18, 1996Date of Patent: March 2, 1999Assignee: E. I. du Pont de Nemours and CompanyInventors: Basil Volodymr Gregorovich, Isidor Hazan, Hisanori Omura
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Patent number: 5859136Abstract: A coating composition containing about 40-90% by weight of film forming binder and 10-60% by weight of an organic liquid carrier;wherein the binder contains about(a) 50-90% by weight, based on the weight of the binder, of a dispersed acrylic polymer having(i) a core of gelled polymerized ethylenically unsaturated monomers which is not soluble in the organic liquid carrier and having amine functional groups and having chemically grafted thereto(ii) substantially linear stabilizer polymeric components that are soluble in the organic liquid carrier and comprise polymerized ethylenically unsaturated monomers and have a weight average molecular weight of about 1,000-20,000 determined by GPC (gel permeation chromatography) using polystyrene as the standard;wherein the monomers of the core and the stabilizer polymeric components are individually selected from the following group of monomers of alkyl (meth)acrylates, wherein the alkyl groups have 1-12 carbon atoms, hydroxy alkyl (meth)acrylate, wherein the alkyl grouType: GrantFiled: November 3, 1997Date of Patent: January 12, 1999Assignee: E. I. du Pont de Nemours and CompanyInventors: Christopher Scopazzi, Laura A. Lewin, Samuel J. Kincaid
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Patent number: 5859113Abstract: 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; whereinthe 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; andthe 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; andwherein the weight ratio of pigment to binder in the dispersion is about 1/100-200/100.Type: GrantFiled: July 17, 1997Date of Patent: January 12, 1999Assignee: E. I. du Pont de Nemours and CompanyInventors: Patrick F. McIntyre, James G. King, Harry J. Spinelli, Henry G. Jakubauskas
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Patent number: 5852123Abstract: A polymeric dispersant for pigments based on an acrylic graft copolymer wherein the graft copolymer has a weight average molecular weight of at least 1500 and has 2 to 97% by weight of a polymeric backbone and 97-2% by weight of macromonomer side chains attached to the backbone and wherein the graft copolymer has at least about 1 weight percent of an imid or urea functional dispersing substituent attached to the backbone, the macromonomer, or both the backbone and the macromonomer.Type: GrantFiled: October 17, 1996Date of Patent: December 22, 1998Assignee: E. I. du Pont de Nemours and CompanyInventor: Jozef Huybrechts
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Patent number: 5830391Abstract: The present invention provides an adjustable, leak-free sealing device for sealing the die orifice of a molten polymer die. The sealing device includes a sealing bar seated against and blocking a portion of the die orifice, a deckle holder slideably connected to one side of the die and extending under the die orifice, and a plurality of springs seated on the deckle holder and biasing the sealing bar against a portion of the die orifice. The springs have a combined spring force equal to or greater than the die orifice outlet pressure such that the sealing bar provides a leak-free seal along a portion of the die orifice.Type: GrantFiled: July 17, 1996Date of Patent: November 3, 1998Assignee: E. I. du Pont de Nemours and CompanyInventors: Matthias Hubert Lamkemeyer, Gerhard Theodor Huechter, Heinrich Moennig
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Patent number: 5798426Abstract: An acrylic polymer of polymerized monomers of about 55-80% by weight of an alkyl methacrylate having 1-12 carbon atoms in the alkyl group, and alkyl acrylate having 1-12 carbon atoms in the alkyl group, substituted or unsubstituted aryl methacrylate or acrylate, substituted or unsubstituted alicyclic methacrylate or acrylate, substituted or unsubstituted cyclic methacrylate or acrylate, a polymerizable vinyl aromatic monomer, vinyl pyrrolidone or any mixtures of the above monomers, and contains about 5-40% by weight of acetoacetoxy ethyl methacrylate and about 5-15% by weight of ethylenically unsaturated acid and the acrylic polymer has a weight average molecular weight of about 10,000-3,000,000 and a glass transition temperature of about -20.degree. to 50.degree. C.Type: GrantFiled: August 13, 1997Date of Patent: August 25, 1998Assignee: E. I. du Pont de Nemours and CompanyInventors: Waifong Liew Anton, Harry Joseph Spinelli, Anjali Abhimanyu Patil
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Patent number: 5789468Abstract: 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 incorporation of an anticrater agent which is a polyoxyalkylene diamine having a number average molecular weight of about 700-5,000 by reacting it with the epoxy resin of the epoxy-amine adduct; wherein the amine to epoxy equivalence ratio of amine groups of the polyoxyalkylene diamine to epoxy groups of the epoxy resin of the epoxy amine adduct is within the range of 0.01-0.90 to 1 and the resulting epoxy amine adduct has a number average molecular weight of about 1,500-20,000; where the above molecular weights are determined by Gel Permeation Chromatography (GPC) using polystyrene as the standard.Type: GrantFiled: March 27, 1997Date of Patent: August 4, 1998Assignee: E. I. du Pont de Nemours and CompanyInventor: Ding Yu Chung
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Patent number: 5773513Abstract: A waterborne coating composition comprising 5-70 weight percent solids of a curing agent and 30-95 weight percent solids of a hydroxy functional acrylic copolymer further comprising 20-70 weight percent of a vinyl aromatic, 0-40 weight percent of a hydroxy functional monomer, 0-70 weight percent of other polymerizable compounds, and 10-80 weight percent of a reaction product of a monoepoxyester and an unsaturated acid functional monomer wherein the copolymer is prepared via skew feed polymerization having a plurality of feed streams charged to a reactor and one feed stream contains 5-60 weight percent of the unsaturated acid functional monomer, 40-95 weight percent of the reaction product of a monoepoxyester and an unsaturated acid functional monomer, and 0-55 weight percent of the other polymerizable compounds.Type: GrantFiled: April 4, 1996Date of Patent: June 30, 1998Assignee: E. I. du Pont de Nemours and CompanyInventors: Jozef Huybrechts, Kerstin Stranimaier
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Patent number: 5770646Abstract: A waterbased dispersion useful for forming aqueous coating compositions containing dispersed hydrophobic material, an aqueous carrier and a branched polymer dispersant (binder);the branched polymer has a weight average molecular weight of about 5,000-100,000 and contains 20-80% by weight of a hydrophilic backbone and correspondingly 80-20% by weight of macromonomer side chains; wherein the backbone is of polymerized ethylenically unsaturated monomers and 2-30% by weight, based on the weight of the backbone of polymerized ethylenically unsaturated monomers having an acid-functional group; and wherein at least 10% of the acid-functional groups are neutralized with an amine or an inorganic base and is hydrophilic in comparison to the side chains; andthe side chains are of macromonomers of polymerized ethylenically unsaturated monomers that are polymerized into the backbone via an ethylenically unsaturated group and the macromonomers have a weight average molecular weight of about 1,000-30,000 and wherein the weiType: GrantFiled: October 29, 1996Date of Patent: June 23, 1998Assignee: E. I. du Pont de Nemours and CompanyInventors: Joseph Albert Antonelli, Christopher Scopazzi, Kerstin Stranimaier
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Patent number: 5770648Abstract: A waterbased dispersion useful for forming aqueous coating composition containing dispersed pigment, an aqueous carrier and a branched polymer dispersant (binder);the branched polymer has a weight average molecular weight of about 5,000-100,000 and contains 20-80% by weight of a hydrophilic backbone and correspondingly 80-20% by weight of macromonomer side chains; whereinthe backbone is of polymerized ethylenically unsaturated monomers and 2-30% by weight, based on the weight of the backbone of polymerized ethylenically unsaturated monomers having an acid-functional group; and wherein at least 10% of the acid-functional groups are neutralized with an amine or an inorganic base and is hydrophilic in comparison to the side chains;the side chains are of macromonomers of polymerized ethylenically unsaturated monomers that are polymerized into the backbone via an ethylenically unsaturated group and the macromonomers have a weight average molecular weight of about 1,000-30,000 and wherein the weight ratio of pigmenType: GrantFiled: October 29, 1996Date of Patent: June 23, 1998Assignee: E. I. du Pont de Nemours and CompanyInventors: Joseph Albert Antonelli, Henry L. Jakubauskas, Christopher Scopazzi
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Patent number: 5763528Abstract: A coating composition of a film forming binder and an organic liquid carrier; wherein the binder contains about(a) 10-90% by weight, based on the weight of the binder, of a dispersed gelled acrylic polymer having a glass transition temperature of at least 20.degree.Type: GrantFiled: December 17, 1996Date of Patent: June 9, 1998Assignee: E. I. du Pont de Nemours and CompanyInventors: Robert John Barsotti, Laura Ann Lewin, Christopher Scopazzi
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Patent number: 5750596Abstract: 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: GrantFiled: December 23, 1996Date of Patent: May 12, 1998Assignee: E. I. du Pont de Nemours and CompanyInventor: Allisa Gam
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Patent number: 5705276Abstract: A coating composition containing about 45-80% by weight of a binder and 20-55% by weight of an organic liquid; wherein the binder contains(A) about 40-90% by weight, based on the weight of the binder, of an acrylic polymer containing polymerized hydroxyl containing monomers of the following group of hydroxy alkyl acrylate or methacrylates having 1-4 carbon atoms in the alkyl group, and polymerized alkyl acrylates and methacrylates having 1-18 carbon atoms in the alkyl groups, or styrene or any mixtures of the above and 0.1-5.0% by weight, based on the weight of the acrylic polymer, of polymerized fluoroalkyl containing monomer represented by the formula ##STR1## where R is hydrogen or an alkyl group having 1-2 carbon atoms, n is an integer of 1-11 and R.sub.f is a fluoroalkyl containing group having at least 4 carbon atoms and(B) about 10-60% by weight, based on the weight of the binder, of a fluorinated organic polyisocyanate crosslinking agent.Type: GrantFiled: October 28, 1996Date of Patent: January 6, 1998Assignee: E. I. Du Pont de Nemours and CompanyInventors: Douglas Robert Anton, Michael J. Darmon, William Frank Graham, Richard Ronald Thomas
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Patent number: 5684084Abstract: A coating composition containing film forming binder and a volatile liquid carrier for the binder; wherein the binder containsa. an acrylic polymer of polymerized monomers selected from the group consisting of an alkyl methacrylate, an alkyl acrylate, each having 1-12 carbon atoms in the alkyl group, isobornyl methacrylate, isobornyl acrylate, hydroxy alkyl methacrylate, hydroxy alkyl acrylate each having 1-4 carbon atoms in the alkyl group, styrene and any mixtures thereof;b. an acrylosilane polymer of polymerized monomers selected from the group consisting of an alkyl methacrylate, an alkyl acrylate, each having 1-12 carbon atoms in the alkyl group, isobornyl methacrylate, isobornyl acrylate, hydroxy alkyl methacrylate, hydroxy alkyl acrylate each having 1-4 carbon atoms in the alkyl group, styrene and any mixtures thereof and an ethylenically unsaturated hydroxy functional acrylosilane monomer; andc.Type: GrantFiled: December 21, 1995Date of Patent: November 4, 1997Assignee: E. I. Du Pont de Nemours and CompanyInventors: Laura Ann Lewin, Gary Warren Nickel
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Patent number: 5667894Abstract: An improved aqueous cathodic electrocoating composition having a binder of an epoxy-amine adduct which is of an epoxy resin that has been reacted with an amine, and a blocked polyisocyanate crosslinking agent; wherein the improvement is the use of an alkane sulfonic acid as the neutralizing agent for the epoxy amine adduct to provide an electrocoating composition having improved throw power.Type: GrantFiled: June 5, 1996Date of Patent: September 16, 1997Assignee: E. I. Du Pont de Nemours and CompanyInventors: Joseph Albert Antonelli, Christopher Scopazzi, William Bertus Vanderlinde
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Patent number: 5641574Abstract: A process for forming an overcoat by the two-coat one-bake method wherein a base coat composition and a clear coat composition are applied to a substrate ##STR1## wet-on-wet and thereafter cured at the same time by heating, the process being characterized in that the base coat composition is an aqueous coating composition consisting primarily of: (I) an aqueous dispersion or solution of a polymer containing a crosslinkable functional group, (II) a crosslinking agent, (III) a coloring pigment, and (IV) water, the clear coat composition being a coating composition comprising: (A) at least one resin selected from the group consisting of (i) a resin having at least one epoxy group and at least one hydroxyl group in the molecule, (ii) a resin mixture of (ii-1) a resin having at least two epoxy groups in the molecule and (ii-2) a resin having at least two hydroxyl groups in the molecule, (iii) a resin having at least two epoxy groups in the molecule, and (iv) any mixture thereof, (B) a crosslinking agent comprisingType: GrantFiled: November 21, 1995Date of Patent: June 24, 1997Assignees: E. I. Du Pont de Nemours and Company, Kansai Paint Company, LimitedInventors: Akira Kasari, Satoshi Ikushima, Osamu Isozaki, Naoji Matsumoto, John David Nordstrom
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Patent number: 5629372Abstract: A clear coating composition containing about 45-80% by weight of a binder and 20-55% by weight of an organic liquid; wherein the binder contains(A) about 40-90% by weight, based on the weight of the binder, of an acrylic polymer containing polymerized hydroxyl containing monomers of the following group of hydroxy alkyl acrylate or methacrylates having 1-4 carbon atoms in the alkyl group, and polymerized alkyl acrylates and methacrylates having 1-18 carbon atoms in the alkyl groups, or styrene or any mixtures of the above and 0.1-5.0% by weight, based on the weight of the acrylic polymer, of polymerized fluoroalkyl containing monomer represented by the formula ##STR1## where R is hydrogen or an alkyl group having 1-2 carbon atoms, n is an integer of 1-11 and R.sub.Type: GrantFiled: October 16, 1995Date of Patent: May 13, 1997Assignee: E. I. Du Pont de Nemours and CompanyInventors: Douglas R. Anton, Michael J. Darmon, William F. Graham, Richard R. Thomas
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Patent number: 5605956Abstract: A fluorinated polyisocyanate which comprises an organic polyisocyanate reacted with a fluorinated monofunctional alcohol represented by the formula ##STR1## where R.sub.f is a fluoroalkyl containing group having at least 4 carbon atoms, X is a divalent radical, R.sup.3 is H or an alkyl group having 1-4 carbon atoms, n is 0-1 and m is 0-30, provided that when n is 0 then m must be equal to or greater than 1 and when m is 0, n is 1, wherein about 0.1-33 mole percent of active isocyanate groups are reacted with the fluorinated monofunctional alcohol; the fluorinated polyisocynate can be used with acrylic polymers, polyesters, alkyd resins, polyols and the like to form coating compositions, sealants, adhesives and the like.Type: GrantFiled: October 16, 1995Date of Patent: February 25, 1997Assignee: E. I. Du Pont de Nemours and CompanyInventors: Douglas R. Anton, Michael J. Darmon, William F. Graham, Richard R. Thomas
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Patent number: 5532027Abstract: An improved process which comprises applying a layer of a color coating composition to a substrate used for the exterior of a motor vehicle and then applying a layer of a clear coating composition to the color coating and curing the resulting clear coat/color coat layer; the improvement is the use of a clear coating composition containing a film forming binder of an acrylosilane polymer and exposing the clear coat layer after curing to an artificial source of UV light under ambient temperatures and atmospheric conditions in an amount sufficient to improve the resistance of the clear coat to water spotting and acid etching when exposed to natural weathering conditions.Type: GrantFiled: December 21, 1994Date of Patent: July 2, 1996Assignee: E. I. Du Pont de Nemours and CompanyInventors: J. David Nordstrom, Hisanori Omura, Alan E. Smith, David M. Thomson