Patents Represented by Attorney, Agent or Law Firm William L. Krayer
  • Crosslinked acrylic sheet with enhanced vacuum molding attributes
    Patent number: 5418048
    Abstract: A protective film is placed on acrylic sheet. The film has a polyethylene side and an adherent EVA side; it will survive stressful lamination procedures as well as thermoforming, and can be easily removed from a finished article after thermoforming.
    Type: Grant
    Filed: January 10, 1994
    Date of Patent: May 23, 1995
    Assignee: Aristech Chemical Corporation
    Inventors: Richard A. Daff, James D. Leaseburge
  • Acrylic-filled thermoformable acrylic sheet
    Patent number: 5415931
    Abstract: A monomer-rich acrylic syrup is cast including about 10% to about 20% ground acrylic particles. During curing, the particles absorb over half their weight in monomer, and a cured sheet is formed in which the matrix monomer and uncrosslinked polymer form a phase which extends through the particles, while the particles appear to be fused together. Including a crosslinker in the syrup further insures the interpenetration of the matrix phase into the swollen particles. A textured surface is formed, which is useful as an anti-slip surface in bathtubs and shower stalls, after thermoforming.
    Type: Grant
    Filed: July 26, 1993
    Date of Patent: May 16, 1995
    Assignee: Aristech Chemical Corporation
    Inventors: Ettore Minghetti, John E. Eitel
  • Hydrotalcite-like materials having a sheet-like morphology and process for production thereof
    Patent number: 5399329
    Abstract: A synthetic hydrotalcite-like material having a sheet-like morphology and a sheet broadness to thickness ratio of at least 50 and a formula Mg.sub.1-x Al.sub.x (OH).sub.2.xA.mH.sub.2 O where A is a mono carboxylic anion of the form RCOO.sup.- where R is C.sub.n H.sub.2n+1 and n=0-5, and x and m are numbers satisfying the following conditions:0.2<=x<=0.40.0<=m<=4It is made by starting with a synthesis mixture having magnesium (divalent cation) to aluminum (trivalent cation) molar ratio between 1:1 and 10:1, mono carboxylic anion to aluminum (trivalent cation) molar ratio between 0.1:1 to 1.2:1 and optionally added other anions. The process comprises of reacting a mixture comprising magnesium and aluminum cations and mono carboxylic anions in an aqueous slurry at a temperature of at least 40.degree. C. and a pH of at least 7.
    Type: Grant
    Filed: July 6, 1993
    Date of Patent: March 21, 1995
    Assignee: Aristech Chemical Corporation
    Inventors: Alain A. Schutz, Leonard A. Cullo, Chandrashekhar P. Kelkar
  • Laminating resins having low organic emissions
    Patent number: 5393830
    Abstract: A laminating resin is made from (1) an unsaturated polyester resin comprising maleic acid, phthalic acid, and glycol(s), and dicyclopentadiene, (2) a diacrylate or dimethacrylate of alkoxylated bisphenol-A, and (3) EG dimethacrylate. The resin requires no styrene or other monomer, although up to 20% vinyl toluene or 40% cyclohexyl methacrylate may be used to adjust viscosity.
    Type: Grant
    Filed: June 14, 1993
    Date of Patent: February 28, 1995
    Assignee: Aristech Chemical Corporation
    Inventors: Thomas W. Smeal, George L. Brownell
  • Iterated foam process and composition for well treatment
    Patent number: 5385206
    Abstract: In the removal of particulates from a wellbore, such as in air drilling for hydrocarbon recovery, a mixture of an amphoteric foaming agent and, typically, an anionic surfactant is employed. An aqueous solution thereof having a pH of at least 9.5 is used to generate a foam for removing the particulates; then the foam is collapsed by the introduction of acid to reduce the pH below about 4, the particles are removed mechanically, the pH is restored to greater than 9.5, and the foaming solution is returned to the wellbore. The solution may be used several times; partial losses of foaming agent in the process may be easily replenished with each cycle. Cationic surfactants may be used instead of anionic, with foaming and foam collapse being controlled at opposite pH's. Savings are realized in water, drilling chemicals, and settling pits and the like for removing particulates from the foam.
    Type: Grant
    Filed: January 21, 1993
    Date of Patent: January 31, 1995
    Assignee: Clearwater, Inc.
    Inventor: Todd R. Thomas
  • Incorporation of functional groups in polymers
    Patent number: 5373061
    Abstract: New polymers are disclosed to be made in supported Ziegler-Natta systems. They include monomers exhibiting polar functionality such as through a hydroxyl group or other functional group protected during polymerization in the presence of highly active catalysts by the use of a protective alkyl silane group which is removed after polymerization to restore the functionality of the group. The typical polymer thus made is a polyolefin having functional groups on its backbone; the functional groups may be reacted with conventional dyes and/or may perform other functions and enter reactions with other reactive compounds.
    Type: Grant
    Filed: January 7, 1994
    Date of Patent: December 13, 1994
    Assignee: Aristech Chemical Corporation
    Inventors: Andrew J. Sivak, Leonard A. Cullo
  • Laminating resins having low organic emissions
    Patent number: 5369201
    Abstract: A laminating resin comprising (A) an acrylated or methacrylated cycloaliphatic epoxide, (B) an acrylated or methacrylated alkoxylated bisphenol-A, in a weight ratio of (A) to (B) of about 3 to 1 to about 1 to 5, and (C) about 5% to about 50%, based on the total composition, cyclohexyl methacrylate. Vinyl toluene and ethylene glycol dimethacrylate are also used to modify certain properties of the resin.
    Type: Grant
    Filed: March 2, 1994
    Date of Patent: November 29, 1994
    Assignee: Aristech Chemical Corporation
    Inventors: Thomas W. Smeal, George L. Brownell
  • Incorporation of functional groups in polymers
    Patent number: 5367090
    Abstract: New polymers are disclosed to be made in supported Ziegler-Natta systems. They include monomers exhibiting polar functionality such as through a hydroxyl group or other functional group protected during polymerization in the presence of highly active catalysts by the use of a protective alkyl silane group which is removed after polymerization to restore the functionality of the group. The typical polymer thus made is a polyolefin having functional groups on its backbone; the functional groups may be reacted with conventional dyes and/or may perform other functions and enter reactions with other reactive compounds.
    Type: Grant
    Filed: February 24, 1993
    Date of Patent: November 22, 1994
    Assignee: Aristech Chemical Corporation
    Inventors: Andrew J. Sivak, Leonard A. Cullo
  • Isophorone process
    Patent number: 5352839
    Abstract: Isophorone is made by the aldol condensation of acetone followed by separate steps to remove acetone, mesityloxide, and beta isophorone. Variations include recycling of mesityloxide and/or beta isophorone.
    Type: Grant
    Filed: September 9, 1993
    Date of Patent: October 4, 1994
    Assignee: Aristech Chemical Corporation
    Inventors: Michael C. Grebinoski, Donald Glassman, Carole L. Elias, Alain A. Schutz
  • Unsaturated polyester-polyurethane hybrid resin foam compositions
    Patent number: 5344852
    Abstract: Water blown, thermosetting unsaturated polyester-polyurethane hybrid foam compositions are formed by the reaction of an A side composition and a B side composition. The A side composition comprises a polyfunctional isocyanate compound and a free radical initiator. The B side composition comprises a mixture of: (i) an ethylenically unsaturated monomer solution having dissolved therein about 30-90 weight percent of a polyester polyol having at least one ethylenically unsaturated group per molecule which has predominantly hydroxyl end groups; (ii) an amine compound having two or more primary or secondary amine groups in an amount effective to react with the A side composition to form small urea domains finely dispersed within a continuous polyester-polyurethane hybrid phase; and (iii) about 25 to about 150 equivalents water based on 100 equivalents of active hydrogen in the B side.
    Type: Grant
    Filed: February 24, 1993
    Date of Patent: September 6, 1994
    Assignee: Aristech Chemical Corporation
    Inventors: Gary T. Brooks, Harold R. Edwards, Jr., Kathy J. Thrash, Donald E. Rubis, David P. Sinclair
  • Recovery of phenol from low concentrations with sodium sulfate
    Patent number: 5344528
    Abstract: Phenol plant waste water containing small amounts of phenol and sodium sulfate is successfully distilled through the addition of recovered sodium sulfate to enhance the volatility of the phenol relative to water; at least a portion of the sodium sulfate is recycled, while a significant portion of the phenol can be returned to the phenol plant for recovery.
    Type: Grant
    Filed: August 4, 1993
    Date of Patent: September 6, 1994
    Assignee: Aristech Chemical Corporation
    Inventors: Thomas H. Bossler, Donald Glassman, Michael C. Grebinoski, Howard H. Morgan, Jr., Jennifer L. Voss
  • Method of making 1,1-bis-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane
    Patent number: 5336812
    Abstract: A process for making 1,1-bis-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane via the acid catalyzed reaction of phenol and 3,3,5-trimethylcyclohexanone containing an organic thiol co-catalyst is described wherein the organic thiol is rejuvenated by treatment with a halogen acid and recycled to a fresh mixture of phenol and 3,3,5-trimethylcyclohexanone to make additional 1,1-bis-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane.
    Type: Grant
    Filed: November 12, 1993
    Date of Patent: August 9, 1994
    Assignee: Aristech Chemical Corporation
    Inventors: Jeffrey S. Salek, Joseph Pugach, Mark R. Rubino
  • Incorporation of functional groups in polymers
    Patent number: 5329037
    Abstract: New polymers are disclosed to be made in supported Ziegler-Natta systems. They include monomers exhibiting polar functionality such as through a hydroxyl group or other functional group protected during polymerization in the presence of highly active catalysts by the use of a protective alkyl silane group which is removed after polymerization to restore the functionality of the group. The typical polymer thus made is a polyolefin having functional groups on its backbone; the functional groups may be reacted with conventional dyes and/or may perform other functions and enter reactions with other reactive compounds.
    Type: Grant
    Filed: April 23, 1993
    Date of Patent: July 12, 1994
    Assignee: Aristech Chemical Corporation
    Inventors: Andrew J. Sivak, Leonard A. Cullo
  • Process for making carbon electrode impregnating pitch from coal tar
    Patent number: 5326457
    Abstract: Carbon electrode impregnating pitch is made from coal tar by centrifugation of the coal tar to remove particulates, followed by milling and distilling the remaining material.
    Type: Grant
    Filed: August 6, 1992
    Date of Patent: July 5, 1994
    Assignee: Aristech Chemical Corporation
    Inventor: John Stipanovich, Jr.
  • Inhibiting the settling of barnacles
    Patent number: 5318814
    Abstract: Settlement of barnacles on surfaces in a marine environment is inhibited by employing as a construction material for said surface of polymers including methyl methacrylate and an effective amount (preferably about 2% to about 10%) of a copolymerizable N-substituted maleimide.
    Type: Grant
    Filed: April 5, 1993
    Date of Patent: June 7, 1994
    Assignee: Aristech Chemical Corporation
    Inventors: Sharon J. Elliott, Virginia Piermattie, Stanley A. Rice, Theodore R. Wessendorf
  • Process for preparing debenzolized tar and low-benzene centrifuged tar sludge
    Patent number: 5314609
    Abstract: Crude coal tar is distilled in the form produced in a coke plant. The distillation tower contains a rectification section to retain naphthalene with the other components heavier than benzene. The benzene is removed overhead.
    Type: Grant
    Filed: August 7, 1992
    Date of Patent: May 24, 1994
    Assignee: Aristech Chemical Corporation
    Inventors: John Stipanovich, Jr., David Q. Wible
  • Method of making crosslinked acrylic sheet with enhanced vacuum molding attributes
    Patent number: 5308425
    Abstract: A protective film is placed on acrylic sheet. The film has a polyethylene side and an adherent EVA side; it will survive stressful lamination procedures as well as thermoforming, and can be easily removed from a finished article after thermoforming.
    Type: Grant
    Filed: October 22, 1992
    Date of Patent: May 3, 1994
    Assignee: Aristech Chemical Corporation
    Inventors: Richard A. Daff, James D. Leaseburge
  • Recovering values from heavy ends in bisphenol-A production
    Patent number: 5300702
    Abstract: In the production of bisphenol-A from the reaction of phenol and acetone, values are recovered from a "heavy ends" fraction by passing the fraction through a thin-film evaporator, making a light fraction which is fractionally distilled into three portions, two of which have recoverable proportions of bisphenol-A, and recovering bisphenol-A from at least one of them.
    Type: Grant
    Filed: March 1, 1993
    Date of Patent: April 5, 1994
    Assignee: Aristech Chemical Corporation
    Inventors: David A. Perkins, John E. Aiken
  • Incorporation of functional groups in polymers
    Patent number: 5296562
    Abstract: New polymers are disclosed to be made in supported Ziegler-Natta systems. They include monomers exhibiting polar functionality such as through a hydroxyl group or other functional group protected during polymerization in the presence of highly active catalysts by the use of a protective alkyl silane group which is removed after polymerization to restore the functionality of the group. The typical polymer thus made is a polyolefin having functional groups on its backbone; the functional groups may be reacted with conventional dyes and/or may perform other functions and enter reactions with other reactive compounds.
    Type: Grant
    Filed: March 18, 1993
    Date of Patent: March 22, 1994
    Assignee: Aristech Chemical Corporation
    Inventors: Andrew J. Sivak, Leonard A. Cullo
  • Incorporation of functional groups in polymers
    Patent number: 5296626
    Abstract: New polymers are disclosed to be made in supported Ziegler-Natta systems. They include monomers exhibiting polar functionality such as through a hydroxyl group or other functional group protected during polymerization in the presence of highly active catalysts by the use of a protective alkyl silane group which is removed after polymerization to restore the functionality of the group. The typical polymer thus made is a polyolefin having functional groups on its backbone; the functional groups may be reacted with conventional dyes and/or may perform other functions and enter reactions with other reactive compounds.
    Type: Grant
    Filed: February 24, 1993
    Date of Patent: March 22, 1994
    Assignee: Aristech Chemical Corporation
    Inventors: Andrew J. Sivak, Leonard A. Cullo