Patents Represented by Attorney Luther A. R. Hall

Find this attorney in the Justia Lawyer Directory

  • Oligomeric hals phosphites and hals phosphonites as stabilisers
    Patent number: 5777008
    Abstract: Novel oligomeric compounds of formula I ##STR1## wherein the general symbols are as defined in claim 1, are disclosed as stabilisers for protecting organic material against oxidative, thermal or light-induced degradation.
    Type: Grant
    Filed: May 25, 1995
    Date of Patent: July 7, 1998
    Assignee: Ciba Specialty Chemicals Corporation
    Inventor: Rita Pitteloud
  • Process for polymerizing cyclical olefins an photopolymerizable composition
    Patent number: 5776997
    Abstract: Process for the photocatalytic polymerization of a cyclical olefin or at least two different cyclical olefins in the presence of a metal compound as the catalyst, in which a photochemical ring-opening metathesis polymerization is carried out in the presence of a catalytic amount of at least one heat-stable titanium(IV), niobium(V), tantalum(V), molybdenum(VI) or tungsten(VI) compound in which a silylmethyl group and at least one halogen are bonded to the metal. The process can also be carried out by first performing the irradiation and ending the polymerization by heating.The process is suitable, for example, for the production of thermoplastic shaping compounds, coatings and images in relief.
    Type: Grant
    Filed: April 23, 1997
    Date of Patent: July 7, 1998
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Andreas Hafner, Andreas Muhlebach, Paul Adriaan Van Der Schaaf
  • Hals phosphorinanes as stabilisers
    Patent number: 5777113
    Abstract: The invention relates to novel compounds of formula I ##STR1## wherein the general symbols are as defined in claim 1, as stabilizers for organic materials against oxidative, thermal or light-induced degradation.
    Type: Grant
    Filed: October 10, 1995
    Date of Patent: July 7, 1998
    Assignee: Ciba Specialty Chemicals Corporation
    Inventor: Rita Pitteloud
  • Carbonate-mediated hydrogen peroxide oxidation of 4-acylamino-2,2,6,6-tetramethylpiperidine
    Patent number: 5777126
    Abstract: An environmentally friendly process is described for the preparation of 4-acyl-amino-2,2,6,6-tetramethylpiperidine-N-oxyl by the carbonate-mediated hydrogen peroxide oxidation of 4-acylamino-2,2,6,6-tetramethylpiperidine. The reaction can also be run in the absence of any catalyst.
    Type: Grant
    Filed: April 21, 1997
    Date of Patent: July 7, 1998
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Stephen Daniel Pastor, Andrea R. Smith
  • Synergistic mixture consisting of a 2,4-dimethyl-6-S-alkylphenol and a sterically hindered phenol
    Patent number: 5772921
    Abstract: The present invention relates to synergistic mixtures of at least one 2,4-dimethyl-6-s-alkyl phenol and at least one selected sterically hindered phenol according to formula II ##STR1## The variable "n" is 1, 2 or 4. X.sub.1 is tert-butyl. X.sub.2 is C.sub.1 -C.sub.4 alkyl. X.sub.3, when n is 1, is C.sub.1 -C.sub.20 alkyl, a triazinylamino group, or a --A.sub.1 --COO--A.sub.2 or --A.sub.1 --CONH--A.sub.2 group. X.sub.3, when n is 2, is a --E.sub.1 --COO--E.sub.2 --OOC--E.sub.3 -- or --E.sub.1 --CONH--E.sub.2 --NHCO--E.sub.3 -- group. X.sub.3, when n is 4, is ?--G.sub.1 --COO!.sub.4 --G.sub.2. The instant synergistic mixtures can be used to stabilize selected organic polymers against thermal, oxidative and/or actinic degradation.
    Type: Grant
    Filed: January 29, 1997
    Date of Patent: June 30, 1998
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Bernard Gilg, Kurt Stinsky
  • Pyrrolodiazine derivatives as stabilizers for chlorine-containing polymers
    Patent number: 5770643
    Abstract: The invention relates to compositions comprisinga) a chlorine-containing polymer andb) at least one compound containing at least one radical of the formula I ##STR1## in which A is the additional groups or atoms necessary to form an unsubstituted or substituted six-membered heterocyclic ring containing two nitrogen ring atoms.
    Type: Grant
    Filed: March 20, 1996
    Date of Patent: June 23, 1998
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Wolfgang Wehner, Hans-Helmut Friedrich, Rolf Drewes
  • Color-photographic recording material
    Patent number: 5763144
    Abstract: The invention relates to a color-photographic recording material which comprises a magenta coupler and, as stabilizer, at least one compound of formula (Ia), (Ib) or (II), where the radicals are as defined in claim 1, and to the novel stabilizers.
    Type: Grant
    Filed: August 5, 1996
    Date of Patent: June 9, 1998
    Assignee: Ciba Specialty Chemicals Corporation
    Inventor: Suruliappa Jeganathan
  • Stabilization of polyamide, polyester and polyketone
    Patent number: 5763512
    Abstract: This invention relates to compositions comprising a polyamide, polyester or polyketone, a specific organic phosphite (Irgafos.RTM.12, Ciba-Geigy) and a sterically hindered phenol such as Irganox.RTM.1098, Irganox.RTM.1076, Irganox.RTM.1010, Irganox.RTM.245, Irganox.RTM.259, Irganox.RTM.1035, Irganox.RTM.3114 or Irganox.RTM.3125 (Ciba-Geigy), to the use thereof for stabilising polyamide, polyester or polyketone against oxidative, thermal and/or light-induced degradation, as well as to a process for stabilising these plastic materials.
    Type: Grant
    Filed: March 24, 1997
    Date of Patent: June 9, 1998
    Assignee: Ciba Specialty Chemicals Corporation
    Inventor: Andre Schmitter
  • o-Hydroxyphenyl-s-triazines
    Patent number: 5760111
    Abstract: o-Hydroxyphenyl-s-triazines are described which contain at least two alkoxyphenyl substituents. They have the formula (1). The compounds according to the invention are suitable as stabilizers for textile fiber materials, in particular polyester fiber materials, and for organic polymers. Furthermore, they are suitable for use as sunscreens in cosmetic preparations.
    Type: Grant
    Filed: September 17, 1996
    Date of Patent: June 2, 1998
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Jean-Luc Birbaum, Jurgen Kaschig, Dieter Reinehr, Manfred Rembold, Andre Schmitter, Helmut Luther, Bernd Herzog, Dietmar Huglin
  • High resolution i-line photoresist of high sensitivity
    Patent number: 5759740
    Abstract: The invention relates to the use of oxime sulfonates of formula 1 ##STR1## wherein R is naphthyl, ##STR2## Ar is an unsubstituted aryl group or an aryl group which carries one or more than one substituent selected from the group consisting of nitro, chloro, bromo, hydroxyl, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 perfluoroalkyl, C.sub.1 -C.sub.4 alkoxy and acid degradable substituent;R.sub.0 is either a R.sub.1 -X group or R.sub.2 ;X is an oxygen or a sulfur atom;R.sub.1 is hydrogen, C.sub.1 -C.sub.4 alkyl or unsubstituted phenyl or phenyl which is substituted by a member selected from the group consisting of chloro, bromo, C.sub.1 -C.sub.4 alkyl and C.sub.1 -C.sub.4 alkoxy, andR.sub.2 is hydrogen, C.sub.1 -C.sub.
    Type: Grant
    Filed: November 13, 1996
    Date of Patent: June 2, 1998
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Norbert Munzel, Reinhard Schulz, Heinz Holzwarth, Stephan Ilg
  • Coating compositions stabilized against damage by light, heat, and oxygen
    Patent number: 5753729
    Abstract: Coatings comprisingA) a binder based on an organic polymer andB) as stabilizer against damage by light, heat and oxygen, a 2-(2'-hydroxyphenyl)-1,3-pyrimidine of the formula I ##STR1## in which the radicals R.sub.1 to R.sup.6 are as defined in claim 1 have an outstanding resistance to the damaging effects of light, oxygen and heat. Compounds of the formula Ib defined in claim 18 are suitable in general for the stabilization of organic material.
    Type: Grant
    Filed: June 7, 1996
    Date of Patent: May 19, 1998
    Inventors: Andreas Valet, Jean-Luc Birbaum, Gerhard Rytz, Norbert Wurms
  • 7-substituted quinone methides as inhibitors for unsaturated monomers
    Patent number: 5750765
    Abstract: Ethylenically unsaturated monomers are protected from premature polymerization during manufacture and storage by the incorporation therein of an effective stabilizing amount of a 7-substituted quinone methide compound.
    Type: Grant
    Filed: August 27, 1996
    Date of Patent: May 12, 1998
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Peter Nesvadba, Samuel Evans, Matthew E. Gande, Volker H. von Ahn, Roland A. E. Winter
  • Increasing the molecular weight of polyesters and premix useful for this process
    Patent number: 5747606
    Abstract: An increase in the molecular weight of polyester and recycled polyester can be achieved by blending said polyester with a difunctional epoxy resin and a sterically hindered hydroxyphenylalkylphosphonic acid ester or half-ester and heating the blend to above the melting point (glass transition temperature) of the polyester.
    Type: Grant
    Filed: July 11, 1997
    Date of Patent: May 5, 1998
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Rudolf Pfaendner, Kurt Hoffmann, Heinz Herbst
  • Polyester/polycarbonate blends having enhanced properties
    Patent number: 5744554
    Abstract: A polyester/polycarbonate (PES/PC) blend having enhanced properties as virgin material and as recyclate comprisesa) at least one phosphite,b) at least one sterically hindered phenol,c) at least one compound promoting the reaction of an epoxy resin with a PES/PC blend which is a Lewis base, andd) at least one difunctional epoxy resin, with 0.01 to 10 parts of component c) being used per 100 parts of PES/PC blend.
    Type: Grant
    Filed: November 25, 1996
    Date of Patent: April 28, 1998
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Rudolf Pfaendner, Kurt Hoffmann, Heinz Herbst
  • Liquid antioxidants as stabilizers
    Patent number: 5739341
    Abstract: Products are described which can be obtained by reacting components a), b) and c), where component a) is a compound of the formula I or a mixture of compounds of the formula I, component b) is a compound of the formula II or a mixture of compounds of the formula II and component c) is a compound of the formula III or a mixture of compounds of the formula III, ##STR1## in which the general symbols are as defined in claim 1, the compound of the formula I being, for example, pentaerythritol, thiodiethylene glycol, 1,4-butanediol, 1,4-propanediol, diethylene glycol, triethylene glycol, diethanolamine or glycerol, the compound of the formula II being, for example, sunflower oil or coconut fat, and the compound of the formula III being, for example, methyl 3-(3',5'-di-tert-butyl-4'-hydroxyphenyl)propionate. The abovementioned products can be used as liquid antioxidants in polymers and lubricants.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: April 14, 1998
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Paul Dubs, Roger Martin, Samuel Evans
  • Stabilized organic material
    Patent number: 5736597
    Abstract: o-Hydroxyphenyl-s-triazines of the formula I ##STR1## in which n is 1 to 4 and R.sub.1 to R.sub.7 are as defined in claim 1, can be used, in combination with sterically hindered amines of the polyalkylpiperidine type, for stabilizing organic polymers. Some of these compounds are novel and can also be used without polyalkylpiperidine.
    Type: Grant
    Filed: October 26, 1993
    Date of Patent: April 7, 1998
    Assignee: Ciba-Geigy Corporation
    Inventors: Jean-Luc Birbaum, Jean Rody, Mario Slongo, Andreas Valet, Roland A. E. Winter
  • Stabilized PVDC-containing PVC
    Patent number: 5726234
    Abstract: The invention relates to stabilized PVDC-containing PVC, preferably a PVC recyclate, comprising as polymer at least 50% by weight of polyvinyl chloride (PVC) and 0.05-50% by weight of PVDC and additionally comprising at least one inorganic compound of the series of the metal oxides, metal hydroxides or metal carbonates.
    Type: Grant
    Filed: February 12, 1997
    Date of Patent: March 10, 1998
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Heinz Herbst, Kurt Hoffmann, Rudolf Pfaendner
  • Tris-aryls-triazines substituted with biphenylyl groups
    Patent number: 5726309
    Abstract: The s-triazines of formula I are UV absorbers having high thermal stability and surprisingly high extinction coefficients making them of especial value for stabilizing polymer subsnates, especially automotive coatings.Tris-aryl-s-triazines in which at least one of the aryl groups has an hydroxy group ortho to the point of attachment to the triazine ring are well known UV absorbers. It is also well-known that this class of triszines protect organic polymers from the deleterious effects of exposure to actinic radiation.The instant invention pertains to novel dimetic or oligomeric tris-aryl-s-triazines wherein at least one of the aryl groups is a biphenylyl or substituted biphenylyl moiety.More particularly, the instant invention relates to compounds of formula I ##STR1## wherein G.sub.1, G.sub.2, and E.sub.2 are here-in-below defined.
    Type: Grant
    Filed: August 27, 1996
    Date of Patent: March 10, 1998
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Tyler A. Stevenson, Revathi Iyengar, Ramanathan Ravichandran
  • Peperidine compounds containing silane groups as stabilizers for organic materials
    Patent number: 5726226
    Abstract: Compounds of formula (I) ##STR1## in which m+n is a number from 1 to 100 and n varies from zero to 90% of the sum of m+n; R.sub.1 and R.sub.3, which may be identical or different, are for example C.sub.1 -C.sub.18 alkyl or phenyl; R.sub.2 is C.sub.2 -C.sub.12 alkylene; G is for example a group of formula (IId) ##STR2## in which R.sub.5 and R.sub.6 are for example hydrogen; R.sub.4 is for example C.sub.1 -C.sub.18 alkyl; L.sub.1 has for example any one of the meanings given to R.sub.1 or is a group (R.sub.28).sub.3 SiO-- where R.sub.28 is C.sub.1 -C.sub.18 alkyl; and L.sub.2 is for example hydrogen, Na, K, C.sub.1 -C.sub.8 alkyl or a group (R.sub.28).sub.3 Si-- with R.sub.28 as defined above.The compounds of formula (I) are useful as light, heat and oxidation stabilizers for organic materials.
    Type: Grant
    Filed: May 22, 1997
    Date of Patent: March 10, 1998
    Assignee: Ciba Specialty Chemcials Corporation
    Inventors: Valerio Borzatta, Primo Carrozza
  • Thiocarbonyl allophanate derivatives used as lubricants
    Patent number: 5726339
    Abstract: The instant invention relates to novel compounds of formula (II) ##STR1## wherein R, R.sup.2 and x are as defined in the Specification. These compounds retard oxidation of, confer protection under extreme pressures to and reduce frictional wear of lubricants and hydraulic fluids.
    Type: Grant
    Filed: March 27, 1996
    Date of Patent: March 10, 1998
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Hugo Camenzind, Peter Nesvadba