Patents Assigned to Hoechst Celanese Corporation
  • Polyester film coated with metal adhesion promoting coating and having superior winding performance
    Patent number: 4921764
    Abstract: An aqueous coating composition is provided for thermoplastic films comprising(i) from 1 to 10 weight percent based upon the total weight of the coating composition, of a sulfonated copolyester consisting essentially of the polyester condensation product of the following monomers or their polyester-forming equivalents:(A) about 65 to 95 mole percent of isophthalic acid;(B) about 0 to 30 mole percent of at least one aliphatic dicarboxylic acid of the formula HOOC(CH.sub.2)--.sub.n COOH, wherein n ranges from about 1-11;(C) about 5 to about 15 mole percent of at least one sulfomonomer containing an alkali metal sulfonate group attached to a dicarboxylic aromatic nucleus; and(D) stoichiometric quantities of about 100 mole percent of at least one copolymerizable aliphatic or cycloaliphatic alkylene glycol having about from 2 to 11 carbon atoms,(ii) from 0.
    Type: Grant
    Filed: February 6, 1989
    Date of Patent: May 1, 1990
    Assignee: Hoechst Celanese Corporation
    Inventors: David Rudd, Sandra W. Rice
  • Low warped filled polyoxymethylene compositions
    Patent number: 4921885
    Abstract: A low warp, filled polyoxymethylene composition comprises a bimodal distribution of glass beads.
    Type: Grant
    Filed: July 12, 1988
    Date of Patent: May 1, 1990
    Assignee: Hoechst Celanese Corporation
    Inventors: Derrick B. McKie, Andris Olukalns
  • Polyester resin having improved processability
    Patent number: 4918156
    Abstract: A polyester resin is disclosed which is resistant to splitting during transverse orientation during conventional film manufacturing. The polyester resin contains up to 7 weight percent, based uon the total weight of the resin, of(A) a dicarboxylic acid component consisting essentially of 1,4-cyclohexandeicarboxylic acid having a trans isomer content of at least 70%(B) a glycol component consisting essentially of(1) 1,4-cyclohexanedimethanol, and(2) from about 15 to about 50 weight percent, based on the weight of the polyesterether, of polytetramethyleneether glycol having a molecular weight of about 500 to about 1100 and(c) from about 0.1 to about 1.5 mole percent, based on the mole percentage of the acid or glycol component, of a branching agent having at least three COOH or OH functional groups and from 3 to 60 carbon atoms.
    Type: Grant
    Filed: June 30, 1987
    Date of Patent: April 17, 1990
    Assignee: Hoechst Celanese Corporation
    Inventor: John H. Rogers
  • Side chain liquid crystalline acrylic copolymers exhibiting nonlinear optical response
    Patent number: 4915491
    Abstract: This invention provides novel acrylic copolymers which exhibit nonlinear optical response, and which have utility as a transparent optical component in optical light switch and light modulator devices.
    Type: Grant
    Filed: October 3, 1986
    Date of Patent: April 10, 1990
    Assignee: Hoechst Celanese Corporation
    Inventors: Ronald N. DeMartino, Hyun-Nam Yoon, James B. Stamatoff
  • Pellets of clay and superabsorbent polymer
    Patent number: 4914066
    Abstract: Moisture absorbing pellets useful as animal litter are made from a blend of bentonite clay and a solid water-swellable but water-insoluble organic polymeric hydrocolloid.
    Type: Grant
    Filed: February 24, 1989
    Date of Patent: April 3, 1990
    Assignee: Hoechst Celanese Corporation
    Inventor: Guy T. Woodrum
  • Three dimensional reproduction material diazonium condensates and use in light sensitive
    Patent number: 4914000
    Abstract: A light-sensitive compound having the formula: ##STR1## wherein R.sub.3 is selected from the group consisting of phenyl and C.sub.1 to C.sub.4 alklyl substituted phenyl.--K-- is selected from the group consisting of ##STR2## --S--, --O--, and --CH.sub.2 --, or is absent; R.sub.1 and R.sub.2 are independently selected from the group consisting of C.sub.1 to C.sub.4 alkyl, methoxy, ethoxy, butoxy, and H;X-- is an anion; andR denotes a hydrogen atom or a C.sub.1 to C.sub.4 alkyl group.
    Type: Grant
    Filed: February 3, 1988
    Date of Patent: April 3, 1990
    Assignee: Hoechst Celanese Corporation
    Inventor: Major S. Dhillon
  • Polyamides prepared from 2-(3-aminophenyl)-2-(4-aminophenyl) hexafluoro propane
    Patent number: 4914180
    Abstract: Polyamides having improved solubility and processing characteristics are provided having incorporated into the polymeric chain a novel aromatic diamine compound, 2-(3-aminophenyl)-2-(4-aminophenyl) hexafluoropropane (3-4'-6F Diamine). The polyamides are prepared by reacting the 3,4'-6F Diamine with an aliphatic or aromatic di-acid or acid halide. It has been found that the polyamides of this invention have improved solubility characteristics, low dielectric constants and improved thermal flow properties as a consequence of the meta/para positioning of the amino groups on the daimine, which renders these polymers more readily melt spinnable for the production of fibers. The polymers may also be compression molded and fabricated into composites at moderate temperatures and pressures.
    Type: Grant
    Filed: September 30, 1988
    Date of Patent: April 3, 1990
    Assignee: Hoechst Celanese Corporation
    Inventor: Rohitkumar H. Vora
  • Split extrusion die assembly for thermoplastic materials and methods of using the same
    Patent number: 4913863
    Abstract: A die spool for the extrusion of thermoplastic materials includes an axially split elongate spool body so as to be separable into first and second spool segments. The spool segments collectively establish the spool body and also define an axially oriented extrusion cavity through which thermoplastic material is conveyed. An alignment system ensures that only a single orientation of the extrusion axis is possible when the die spool is coupled to another similar die spool (or to an extrusion die associated with an extruder). A die spool assembly may therefore be provided which is comprised of a number of individual die spools. Preferably, a decreasing temperature gradient is established within the extrusion cavity of the die spool assembly (as may be accomplished by controllably operating electrical resistive heater elements) so as to at least partially solidify the thermoplastic extrudate therewithin.
    Type: Grant
    Filed: January 30, 1989
    Date of Patent: April 3, 1990
    Assignee: Hoechst Celanese Corporation
    Inventors: John F. Burrafato, Robert E. Hooper
  • Water developable, negative working overlay or transfer type diazo color proofing system
    Patent number: 4914039
    Abstract: This invention relates to water developable, negative working photosensitized sheet constructions which, upon exposure to an actinic radiation source through a screened image, can accurately reproduce said image. The construction is useful as a color proofing film which can be employed to predict the image quality from a lithographic printing process. The invention provides both overlay and transfer type proofing sheets which have good fingerprint resistance.
    Type: Grant
    Filed: April 20, 1988
    Date of Patent: April 3, 1990
    Assignee: Hoechst Celanese Corporation
    Inventor: Stanley F. Wanat
  • Developer-finisher compositions for lithographic plates
    Patent number: 4912021
    Abstract: A developing and finishing composition for lithographic printing plates containing:a. a mono-, di-, or tri-sodium potassium or lithium phosphate; andb. benzyl alcohol, phenoxyethanol or phenoxypropanol; andc. polyvinyl pyrrolidone, dextrin, poly (methyl vinyl ether/maleic acid) or gum arabic; andd. citric acid or benzoic acid; ande. sodium or potassium octyl sulfate; andf. sodium, potassium or lithium benzoate; andg. sodium, potassium or ammonium citrate; andh. sodium, potassium or ammonium sorbate; andi. sufficient water to formulate an effective developer.
    Type: Grant
    Filed: June 19, 1989
    Date of Patent: March 27, 1990
    Assignee: Hoechst Celanese Corporation
    Inventors: Major S. Dhillon, Shane Hsieh, Douglas A. Seeley
  • High resolution photoresist based on imide containing polymers
    Patent number: 4912018
    Abstract: Photoresist compositions suitable for deep UV and excimer laser lithography are disclosed that are mixtures of a photoacid and a polymer having imide residues to which acid labile groups are attached.The imide group ##STR1## can be blocked with certain groups, X, to form compounds containing the structure ##STR2## which have solubility properties different from the unblocked imide. These groups, X, can be cleaved by acid under the proper conditions to regenerate the unblocked imide. Where the imide group is incorporated in a polymer, the polymer with blocked imide groups can be made to function as a resist when compounded with a substance capable of forming an acid upon exposure to radiation.Preferred polymers are those in which at least 80% of the imide groups are blocked. When less than 50% of the imide groups are blocked, performance in a photoresist becomes unacceptable.
    Type: Grant
    Filed: June 22, 1987
    Date of Patent: March 27, 1990
    Assignee: Hoechst Celanese Corporation
    Inventors: Christopher E. Osuch, Michael J. McFarland
  • Sintered polybenzimidazole/polyaryleneketone articles and method of manufacture
    Patent number: 4912176
    Abstract: Sinterd molded article having improved thermal resistance and strength formed from a homogeneous mixture comprising from about 5 to 75 percent by weight polybenzimidazole and from about 95 to 25 percent by weight of a polyaryleneketone.
    Type: Grant
    Filed: April 13, 1989
    Date of Patent: March 27, 1990
    Assignee: Hoechst Celanese Corporation
    Inventors: Edwardo Alvarez, Lorenzo P. DiSano, Bennett C. Ward
  • Hydrolysis of poly(acetoxystyrene) in aqueous suspension
    Patent number: 4912173
    Abstract: Polymers of 4-acetoxystyrene in finely divided particulate form are suspended in water, and while in suspension are hydrolyzed to polymers of 4-hydroxystyrene using aqueous nitrogen bases. Such polymers are useful in photoresists, as protective coatings for metal, in the manufacture of epoxy resins and epoxy resin curing agents.
    Type: Grant
    Filed: October 30, 1987
    Date of Patent: March 27, 1990
    Assignee: Hoechst Celanese Corporation
    Inventors: Donna L. Keene, Dung Q. Tran
  • Weighted bale blanket and method for using the same
    Patent number: 4910855
    Abstract: A blanket with a weighted perimeter and a method of its use are disclosed herein. This blanket is used as a safety device which can prevent injury to a person cutting baling straps, that surround baled materials and that are under tension, by dampening the whiplash of the straps when cut.
    Type: Grant
    Filed: March 31, 1989
    Date of Patent: March 27, 1990
    Assignee: Hoechst Celanese Corporation
    Inventor: Roger S. Balarzs
  • Preparation of receiver sheet materials for peel developable, single sheet color proofing system
    Patent number: 4910120
    Abstract: This invention relates to positive-working, photopolymerizable containing sheet constructions which, upon exposure to an actinic radiation source through a screened image, can accurately reproduce said image on conventional paper with an adhesive layer pretreatment. The construction is useful as a peel apart color proofing film which can be employed to accurately predict the image quality from a lithographic printing process.
    Type: Grant
    Filed: October 21, 1988
    Date of Patent: March 20, 1990
    Assignee: Hoechst Celanese Corporation
    Inventors: Stephan J. W. Platzer, Timothy T. Hannigan
  • Production of .alpha.-chloro-.alpha.-oximino-4-hydroxyacetophenone
    Patent number: 4910338
    Abstract: .alpha.-chloro-.alpha.-oximino-4-hydroxyacetophenone is prepared by reacting 4-hydroxyacetophenone with an alkyl nitrite and hydrogen chloride wherein the amount of hydrogen chloride is carefully controlled to limit the amount thereof to about 0.1 to 6 moles of hydrogen chloride per mole of 4-hydroxyacetophenone until at least one equivalent of the alkyl nitrite is reacted. Subsequent to the reaction of the one equivalent of alkyl nitrite, at least 1 mole of hydrogen chloride per mole of initially charged 4-hydroxyacetophenone is added to the reaction medium.
    Type: Grant
    Filed: February 14, 1989
    Date of Patent: March 20, 1990
    Assignee: Hoechst Celanese Corporation
    Inventor: Olan S. Fruchey
  • Melt extruded elongated member suitable for improved service as a stiffening support in an optical fiber cable
    Patent number: 4910057
    Abstract: The present invention provides a highly elongated member of substantially uniform cross-sectional configuration which is capable of improved service as a stiffening support in an optical fiber cable. Such elongated member is the product of melt extrusion through an appropriate orifice of a thermotropic liquid crystalline polymer (as described). The resulting elongated member has been found to offer significant advantages when compared to stiffening supports heretofore proposed for use in optical fiber cables.
    Type: Grant
    Filed: April 2, 1982
    Date of Patent: March 20, 1990
    Assignee: Hoechst Celanese Corporation
    Inventors: Yoshiaki Ide, Gabor Kiss, Hyun N. Yoon
  • Formation of halogenated polymeric microporous membranes having improved strength properties
    Patent number: 4910106
    Abstract: Disclosed herein is a process for producing a polyhalogenated microporous film having a very narrow pore size distribution and good temperature and chemical resistance. The process involves blending a polyhalogenated copolymer having a very small particle size with a binder polymer utilizing a solvent which is a nonsolvent for the polyhalogenated copolymer but a solvent for the binder polymer, forming a film from the blend, drying the film, heating the film to a temperature at or above the melting point of the polyhalogenated copolymer and under conditions such that the microparticulate particles at their points of mutual contact will neck together to form a relatively continuous matrix and extracting the binder polymer from the film utilizing a solvent for the binder particle to form a microporous film.
    Type: Grant
    Filed: August 5, 1988
    Date of Patent: March 20, 1990
    Assignee: Hoechst Celanese Corporation
    Inventors: Edward R. Kafchinski, Herman L. LaNieve, III, Gordon W. Calundann, Tai-Shung Chung
  • Polymerizable quaternary ammonium methyl carbonates
    Patent number: 4910325
    Abstract: In one embodiment this invention provides a novel polymerizable quaternary ammonium carbonate corresponding to the formula: ##STR1## In another embodiment this invention provides a novel copolymer of the above represented methacrylamidopropyltrimethylammonium methyl carbonate and acrylamide, which exhibits a high level clay flocculation efficiency.
    Type: Grant
    Filed: January 25, 1989
    Date of Patent: March 20, 1990
    Assignee: Hoechst Celanese Corporation
    Inventors: Thomas C. Shen, James H. Rea
  • Food receptacle
    Patent number: D307395
    Type: Grant
    Filed: December 2, 1986
    Date of Patent: April 24, 1990
    Assignee: Hoechst Celanese Corporation
    Inventor: Rodney D. Borst