Patents Assigned to Hoechst Celanese Corporation
  • Patent number: 6312772
    Abstract: Multilayer laminates including films, sheets, preforms, containers and other articles having at least one wholly aromatic, amorphous, stretchable liquid crystalline polymer layer with at least one non-polyester thermoplastic polymer layer are provided as well as methods for producing and stretching the multilayer articles. The laminates are suitable for thermoforming and stretch blow molding applications and may be stretched at temperatures lower than the molten state of the liquid crystal polymer and at high total draw ratios without fractures or tears. Containers suitable for food or beverage products may be produced from the laminates.
    Type: Grant
    Filed: October 20, 1997
    Date of Patent: November 6, 2001
    Assignee: Hoechst Celanese Corporation
    Inventors: James E. Kuder, Ronald N. Demartino, Dominick Cangiano, Randy Douglas Jester, Arnold E. Wolf, Robert M. Kimmel, Sherman H. Rounsville, John Arthur Penoyer
  • Patent number: 6268026
    Abstract: Multilayer laminates including films, sheets, preforms, containers and other articles having at least one wholly aromatic, amorphous, stretchable liquid crystalline polymer layer with at least one non-liquid crystalline thermoplastic polyester layer are provided as well as methods for producing and stretching the multilayer articles. The laminates are suitable for thermoforming and stretch blow molding applications and may be stretched to at least 100 percent elongation at temperatures below 200° C. and at high total draw ratios without fractures or tears. Containers suitable for food or beverage products may be produced from the laminates.
    Type: Grant
    Filed: October 20, 1997
    Date of Patent: July 31, 2001
    Assignee: Hoechst Celanese Corporation
    Inventors: Randy D. Jester, Arnold E. Wolf, Robert M. Kimmel, Dominick Cangiano, John A. Penoyer
  • Patent number: 6258884
    Abstract: Polymeric compositions characterized by containing polymeric acetals and zinc-containing inorganic fillers exhibiting improved resistance to the formation and adhesion of mineral deposits when used in applications wherein the composition is exposed to water containing dissolved minerals for extended periods of time. The composition may be prepared into shaped articles which are useful as mineral resistant, plumbing fixtures.
    Type: Grant
    Filed: March 23, 1993
    Date of Patent: July 10, 2001
    Assignee: Hoechst Celanese Corporation
    Inventor: Bruce Mulholland
  • Patent number: 6127028
    Abstract: A fiber having increased cut resistance is made from a fiber-forming polymer and a hard filler having a Mohs Hardness Value greater than about 3. The filler is included in an amount of about 0.05% to about 20% by weight. In preferred embodiments, the fiber-forming polymer is poly(ethylene terephthalate) or a liquid crystalline polyester including monomer units derived from 6-hydroxy-2-naphthoic acid and 4-hydroxybenzoic acid. Preferred fillers include tungsten and alumina.
    Type: Grant
    Filed: October 13, 1998
    Date of Patent: October 3, 2000
    Assignee: Hoechst Celanese Corporation
    Inventors: Robert Bruce Sandor, Michele C. Carter, Gunilla E. Gillberg-LaForce, William F. Clear, John A. Flint, Herman Leslie LaNieve, Scott W. Thompson, Etheridge Odell Oakley, Jr., Edward Ronald Kafchinski, Mohammed Ishaq Haider
  • Patent number: 6103372
    Abstract: A fiber having increased cut resistance is made from a fiber-forming polymer and a hard filler having a Mohs Hardness Value greater than about 3. The filler is included in an amount of about 0.05% to about 20% by weight. In preferred embodiments, the fiber-forming polymer is poly(ethylene terephthalate) or a liquid crystalline polyester comprising monomer units derived from 6-hydroxy-2-naphthoic acid and 4-hydroxybenzoic acid. Preferred fillers include tungsten and alumina.
    Type: Grant
    Filed: December 15, 1998
    Date of Patent: August 15, 2000
    Assignee: Hoechst Celanese Corporation
    Inventors: Robert Bruce Sandor, Michele C. Carter, Gunilla E. Gillberg-LaForce, William F. Clear, John A. Flint, Herman Leslie Lanieve, Scott W. Thompson, Etheridge Odell Oakley, Jr., Edward Ronald Kafchinski, Mohammed Ishaq Haider
  • Patent number: 6090888
    Abstract: This invention discloses blends of cyclic olefin polymers and styrene-containing elastomers useful as molding compositions to mold articles therefrom. The articles so molded exhibit improved mechanical properties without any significant effect on optical properties, making them ideally suitable for applications such as optical discs, lenses and the like.
    Type: Grant
    Filed: June 6, 1996
    Date of Patent: July 18, 2000
    Assignee: Hoechst Celanese Corporation
    Inventors: Garo Khanarian, Thomas J. Dolce
  • Patent number: 6090516
    Abstract: This invention provides a free-flowing polyester dye powder which has superior stability and transparency for application in electrophotographic imaging systems. In another embodiment this invention provides novel chromophoric diester monomers which are reacted with diol monomers to form an invention polyester dye. A present invention toner composition comprises particulate polyester dye, and one or more optional components such as a charge control agent or a surfactant.
    Type: Grant
    Filed: October 4, 1999
    Date of Patent: July 18, 2000
    Assignee: Hoechst Celanese Corporation
    Inventors: Eui-Won Choe, Rao D. Mikkilineni, Hyun-Nam Yoon, Marie Borzo, Kophu Chiang
  • Patent number: 6090973
    Abstract: This invention provides a free-flowing polyester dye powder which has superior stability and transparency for application in electro-photographic imaging systems. In another embodiment this invention provides novel chromophoric diester monomers which are reacted with diol monomers to form an invention polyester dye. A present invention toner composition comprises particulate polyester dye, and one or more optional components such as a charge control agent or a surfactant.
    Type: Grant
    Filed: October 4, 1999
    Date of Patent: July 18, 2000
    Assignee: Hoechst Celanese Corporation
    Inventors: Marie Borzo, Kophu Chiang, Eui-Won Choe, Rao D. Mikkilineni, Hyun-Nam Yoon
  • Patent number: 6080474
    Abstract: A polymeric article having improved cut-resistance is composed of (A) an initial polymeric article having cut-resistant properties; and (B) a cut-resistant elastomeric coating disposed on an outer surface of the initial polymeric article, wherein the elastomeric coating is composed of an elastomer and a hard filler distributed in the elastomer. The hard filler has a Mohs Hardness value of at least about 3. The final polymeric article has improved cut-resistance, improved flexibility, and improved comfort and will retain its properties when routinely laundered. The article is preferably in the form of a polymeric textile article, more preferably in the form of an elastomeric protective garment, and most preferably in the form of gloves, e.g., surgical gloves.
    Type: Grant
    Filed: October 8, 1997
    Date of Patent: June 27, 2000
    Assignee: Hoechst Celanese Corporation
    Inventors: Ehteridge Odell Oakley, Gregory J. Johnson, Herman Leslie Lanieve
  • Patent number: 6042902
    Abstract: Multilayer films that include a thermotropic liquid crystalline polymer film layer and a poly(ethylene terephthalate) or polycarbonate film layer are bound together using a hot melt adhesive, which may be either (1) a blend of poly(.alpha.-olefins) that includes isotactic polypropylene, a polymer of a second lower poly(.alpha.-olefin), and a small amount of a higher poly(.alpha.-olefin); or (2) a polyamide-based hot melt adhesive.
    Type: Grant
    Filed: October 20, 1997
    Date of Patent: March 28, 2000
    Assignee: Hoechst Celanese Corporation
    Inventors: James E. Kuder, Dominick Cangiano, Vincent J. Provino, Wayne Xu
  • Patent number: 6020414
    Abstract: An acrylic modifier composition for improving impact resistance of polyester compositions is provided which comprises (a) between about 10% to about 90% by weight of a first component selected from the group consisting of an ethylene alkyl acrylate co-polymer and ethylene alkyl methacrylate copolymer, wherein the alkyl is C1 to C10; and (b) between about 10% to about 90% by weight of a second component selected from the terpolymer group consisting of ethylene/alkylacrylate/ glycidyl methacrylate; ethylene/alkyl acrylate/glycidyl acrylate; ethylene/alkyl methacrylate/glycidyl acrylate; and ethylene/alkyl methacrylate/glycidyl methacrylate, wherein the alkyl is C1 to C10. Polyester compositions toughened by addition of the modifier composition are disclosed, as are articles molded from these compositions and processes for forming these polyester compositions.
    Type: Grant
    Filed: October 23, 1996
    Date of Patent: February 1, 2000
    Assignee: Hoechst Celanese Corporation
    Inventors: Suzanne Nelsen, Michael Golder, Paul DeStio, Mengshi Lu
  • Patent number: 6015524
    Abstract: Multilayer films that include a thermotropic liquid crystalline polymer film layer and a polyethylene film layer are bound together using one of the following hot melt adhesives: ethylene-glycidyl methacrylate copolymer, ethylene-methyl acrylate-glycidyl methacrylate terpolymer, ethylene vinyl acetate copolymer, a polyolefin blend, ethylene-acrylic acid copolymer, and mixtures thereof.
    Type: Grant
    Filed: October 20, 1997
    Date of Patent: January 18, 2000
    Assignee: Hoechst Celanese Corporation
    Inventors: James E. Kuder, Dominick Cangiano, Vincent J. Provino, Wayne Xu
  • Patent number: 6013373
    Abstract: Multilayer films that include a thermotropic liquid crystalline polymer film layer and a polypropyene film layer are bound together using hot melt adhesives which may be either (1) a blend of poly(.alpha.-olefins), comprised of isotactic polypropylene, a polymer of a second lower poly(.alpha.-olefin), and a small amount of a higher poly(.alpha.-olefin), or (2) a blend of poly(propylene-graft-maleic anhydride) and a dimer acid based polyamide. These hot melt adhesives also act as compatiblizers for blends of polypropylene and thermotropic liquid crystalline polymers.
    Type: Grant
    Filed: October 20, 1997
    Date of Patent: January 11, 2000
    Assignee: Hoechst Celanese Corporation
    Inventors: James E. Kuder, Dominick Cangiano, Vincent J. Provino, Wayne Xu
  • Patent number: 6001980
    Abstract: This invention provides a free-flowing polyester dye powder which has superior stability and transparency for application in electro-photographic imaging systems. In another embodiment this invention provides novel chromophoric diester monomers which are reacted with diol monomers to form an invention polyester dye. A present invention toner composition comprises particulate polyester dye, and one or more optional components such as a charge control agent or a surfactant.
    Type: Grant
    Filed: September 3, 1997
    Date of Patent: December 14, 1999
    Assignee: Hoechst Celanese Corporation
    Inventors: Marie Borzo, Rao D. Mikkilineni, Kophu Chiang, Eui-Won Choe, Hyun-Nam Yoon
  • Patent number: 5976998
    Abstract: A fiber having increased cut resistance is made from a fiber-forming polymer and a hard filler having a Mohs Hardness Value greater than about 3. The filler is included in an amount of about 0.05% to about 20% by weight. In preferred embodiments, the fiber-forming polymer is poly(ethylene terephthalate) or a liquid crystalline polyester comprising monomer units derived from 6-hydroxy-2-naphthoic acid and 4-hydroxybenzoic acid. Preferred fillers include tungsten and alumina.
    Type: Grant
    Filed: October 13, 1998
    Date of Patent: November 2, 1999
    Assignee: Hoechst Celanese Corporation
    Inventors: Robert Bruce Sandor, Michele C. Carter, Gunilla E. Gillberg-LaForce, William F. Clear, John A. Flint, Herman Leslie Lanieve, Scott W. Thompson, Etheridge Odell Oakley, Jr.
  • Patent number: 5972477
    Abstract: Laminated fiber network structures having high resilience, good cushioning properties, and excellent impact-resistance include at least one layer of a three-dimensional fiber network material and a second layer, which may be a planar material (e.g. a fabric, film, or sheet) or a second layer of a three-dimensional fiber network material. The surfaces of the two layers face each other and are bonded together at their points of contact. The three-dimensional fiber network material is a fabric made from thermoplastic filaments that are at least 0.1 mm in diameter, where the fabric has an array of projections and optional depressions pushed out of one or both sides of the fabric.
    Type: Grant
    Filed: June 23, 1997
    Date of Patent: October 26, 1999
    Assignee: Hoechst Celanese Corporation
    Inventors: Dai W. Kim, Gerald Peter Rumierz, Clinton Dale Felton
  • Patent number: 5965273
    Abstract: A polymeric composition which has a dielectric constant K' greater than 4 at 20.degree. C. which varies little with temperature is made from a polymer or mixture of polymers and a ceramic or a mixture of ceramics, where the polymer or mixture of polymers has a dielectric constant K' in the range of about 1.5 to about 3.5 and a temperature coefficient of dielectric constant TCK' that is negative and is between 0 and about -300 ppm/degree C.; and the ceramic includes a first ceramic, which may be one ceramic or a mixture of ceramics, each having a dielectric constant in the range of about 15 to about 200 and a TCK' that is positive and is between zero and about 3000 ppm/degree C.; and an optional second ceramic, which may be one ceramic or a mixture of ceramics, each having a dielectric constant in the range from about 3 up to about 15 and a TCK' that is positive and is between zero and about 300 ppm/degree C.
    Type: Grant
    Filed: January 31, 1997
    Date of Patent: October 12, 1999
    Assignee: Hoechst Celanese Corporation
    Inventors: Lakshaman M. Walpita, Michael R. Ahern
  • Patent number: 5962122
    Abstract: Polymeric compositions having a high dielectric constant are made from a thermotropic liquid crystalline and a ceramic having a dielectric constant which is greater than about 50 at a frequency of 1.0 GHz. The compositions have a dielectric constant of at least about 4, and preferably at least about 6. Preferred compositions also have a low loss tangent.
    Type: Grant
    Filed: November 28, 1995
    Date of Patent: October 5, 1999
    Assignee: Hoechst Celanese Corporation
    Inventors: Lak M. Walpita, William M. Pleban, Helmut Eckhardt
  • Patent number: 5925710
    Abstract: The present invention relates to a polyester polymer composition containing graphite in the range of about 3-60 parts per million based on the polyester. The size of the graphite particles is greater than about 0.5 .mu.m. As an upper limit, however, any particle size which is not visible to the naked eye is acceptable. Such polyester polymers having graphite incorporated therein absorb infrared radiation better than polymers containing no graphite and thus in the production of plastic bottles less energy is required to heat the preform so that it can be blow molded into a bottle.
    Type: Grant
    Filed: June 9, 1997
    Date of Patent: July 20, 1999
    Assignee: Hoechst Celanese Corporation
    Inventors: Audrey C. Wu, Gerald W. McNeely, Xiaoyan Huang
  • Patent number: 5919889
    Abstract: A melt processable poly(ester-amide) which is capable of forming an anisotropic melt phase is provided. A poly(ester-amide) of the present invention may have recurring units of: (a) 4-hydroxybenzoyl moiety, (b) 6-oxy-2-naphthoyl moiety, (c) 4,4'-biphenol moiety, (d) terephthaloyl moiety, and (e) an aromatic moiety capable of forming an amide linkage in the proportions indicated. Preferably, the moiety capable of forming an amide linkage is derived from p-aminophenol, p-phenylenediamine, N-acetyl-p-aminophenol, etc. The resulting poly(ester-amide) is capable of undergoing melt-processing in the temperature range of from about 300.degree. to about 400.degree. C.
    Type: Grant
    Filed: December 23, 1992
    Date of Patent: July 6, 1999
    Assignee: Hoechst Celanese Corporation
    Inventors: Cherylyn Lee, Larry F. Charbonneau