Patents Represented by Attorney Luther A. R. Hall

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  • Non-migrating 1-hydrocarbyloxy hindered amine derivatives as polymer stabilizers
    Patent number: 5442071
    Abstract: 1-Hydrocarbyloxy substituted hindered amine compounds which also contain a reactive functional group such as hydroxy, amino, oxirane or carboxyl can be chemically attached to selected polymer substrates by condensation reactions to give polymers containing a chemically-bonded, non-migrating stabilizer having excellent stabilization efficacy for protecting said polymer substrate from the adverse effects of actinic light.
    Type: Grant
    Filed: August 2, 1994
    Date of Patent: August 15, 1995
    Assignee: Ciba-Geigy Corporation
    Inventors: James P. Galbo, Ramanathan Ravichandran, Peter J. Schirmann, Andrew Mar
  • Tetra-[N-alkyl-2,2,6,6,-tetramethylpiperidin-4-yl]-4,4'-diphenylbis phosphonite
    Patent number: 5442067
    Abstract: Tetra-[N-alkyl-2,2,6,6-tetramethylpiperidin-4-yl]-4,4'-diphenylbisphosphoni te Abstract of the DisclosureNovel compounds of formula I ##STR1## wherein R is C.sub.1 -C.sub.4 alkyl, allyl or benzyl, as stabilisers for protecting organic materials from thermal, oxidative or light-induced degradation.
    Type: Grant
    Filed: October 14, 1994
    Date of Patent: August 15, 1995
    Assignee: Ciba-Geigy Corporation
    Inventor: Rita Pitteloud
  • 2-(benzotriazol-2-yl)-4-alkyl-6-(2-hydrox y-3-benzoyl-6-alkoxybenzyl)phenols and stabilized compositions
    Patent number: 5439955
    Abstract: 2-(Benzotriazol-2-yl)-4-alkyl-6-(2-hydroxy-3-benzoyl-6-alkoxybenzyl)phenols are prepared by reacting a Mannich base of a 2-(2-hydroxy-5-alkylphenyl)-2H-benzotriazole with a 2-hydroxy-4-alkoxybenzophenone. The hybrid products exhibit outstanding efficacy in protecting organic substrates from light-induced deterioration as well as good resistance to loss by volatilization or exudation during the processing of stabilized compositions at elevated temperatures.
    Type: Grant
    Filed: November 1, 1994
    Date of Patent: August 8, 1995
    Assignee: Ciba-Geigy Corporation
    Inventors: Robert A. Falk, John J. Luzzi, Gregory R. Coughlin
  • Polyalkyl-4-piperidinol derivatives for use as stabilizers for organic materials
    Patent number: 5439958
    Abstract: The present invention relates to novel piperidine compounds of the formula (I) and to their use as light stabilizers, heat stabilizers and oxidation stabilizers for organic materials.The definitions of R.sub.1, R.sub.2 and R.sub.3 are given in the text.
    Type: Grant
    Filed: July 21, 1994
    Date of Patent: August 8, 1995
    Assignee: Ciba-Geigy Corporation
    Inventors: Roberto Scrima, Graziano Zagnoni, Michael H. Ackerman, James P. Galbo, Roland A. E. Winter
  • Process for the preparation of mono- and diaryltriazines
    Patent number: 5438138
    Abstract: A process for the selective preparation of 2,4-dichloro-6-aryl- or 2-chloro-4,6-diaryl-1,3,5-triazines is described, which comprises reacting a compound of formula II ##STR1## wherein X is a bromine or chlorine atom, and R.sup.1 and R.sup.2 are independently hydrogen or alkyl, in tetrahydrofuran with magnesium metal to form the corresponding Grignard reagent, and reacting the resultant solution with cyanuric chloride of formula III ##STR2## such that, if Z is --Cl, at least 1.05 mol and, if Z is a radical of formula Ib, at least 2.1 mol, of Grignard reagent is used per 1 mol of cyanuric chloride. The compounds of formula I can be used with advantage for the preparation of 2-(o-hydroxyphenyl)-4,6-diaryl-s-triazines, which are known light stabilizers for organic material.
    Type: Grant
    Filed: June 28, 1993
    Date of Patent: August 1, 1995
    Assignee: Ciba-Geigy Corporation
    Inventors: Helmut Henneberger, Markus Wagner
  • Compositions stabilized with 5-sulfonyl-substituted benotriazole UV-absorbers
    Patent number: 5436349
    Abstract: 2-(2-Hydroxyphenyl)-2H-benzotriazole UV-absorbers substituted at the 5-position of the benzo ring by a sulfoxide or sulfone group exhibit enhanced absorption in the near visible range (over 350 nm) allowing said compounds to be particularly effective in protecting polymer systems which are prone to degradation caused by actinic irradiation with wavelengths over 350 nm.
    Type: Grant
    Filed: November 1, 1993
    Date of Patent: July 25, 1995
    Assignee: Ciba-Geigy Corporation
    Inventors: Roland A. E. Winter, Volker H. von Ahn, Tyler A. Stevenson, Mark S. Holt, Ramanathan Ravichandran
  • Epoxy resin toughened with a polyether sulfone and polyarylsulfidesulfone
    Patent number: 5434226
    Abstract: Thermosetting resin systems exhibiting improved performance characteristics when utilized in composite product applications, said resin systems being modified with a polyarylsulfidesulfone dispersed therein and with a polyethersulfone dissolved therein.
    Type: Grant
    Filed: January 28, 1994
    Date of Patent: July 18, 1995
    Assignee: Ciba-Geigy Corporation
    Inventors: Ly D. Nguyen, Matthew A. Lowry, Deborah L. Stone, Julie A. Underwood
  • 3-(Dihydrobenzofuran-5-yl)benzofuran-2-ones as stabilizers
    Patent number: 5428177
    Abstract: Novel compounds of formula (1) ##STR1## wherein R.sub.1 is hydrogen, alkyl or alkaryl, R.sub.2 to R.sub.5 are independently hydrogen, chloro, alkyl phenylalkyl, aryl, cycloalkyl, alkoxy, alkylthio, hydroxy, amino or substituted amino, R.sub.6 is hydrogen, R.sub.7 and R.sub.8 are hydrogen or alkyl, R.sub.9 and R.sub.9 ' are hydrogen, alkyl or phenyl, and R.sub.10 is hydrogen or alkyl, are disclosed as stabilisers for protecting organic materials against thermal, oxidative or light-induced degradation.
    Type: Grant
    Filed: September 20, 1993
    Date of Patent: June 27, 1995
    Assignee: Ciba-Geigy Corporation
    Inventor: Peter Nesvadba
  • Substituted phenols as stabilizers
    Patent number: 5427701
    Abstract: Novel compositions are described which comprises an elastomer or a lubricant and at least one compound of the formulae I or II ##STR1## The symbols R.sub.1, R.sub.2, R.sub.3, Z.sub.1 and Z.sub.2 are as defined in claim 1.The compounds of the formula II and some of the compounds of the formula I are novel, and they are used especially as antioxidants.
    Type: Grant
    Filed: July 14, 1994
    Date of Patent: June 27, 1995
    Assignee: Ciba-Geigy Corporation
    Inventors: Hans R. Meier, Samuel Evans, Paul Dubs
  • 3-(2-acyloxyethoxyphenyl)benzofuran-2-ones for use as stabilizers
    Patent number: 5428162
    Abstract: Novel compounds of the formula (1), ##STR1## in which R.sub.1 is hydrogen or acyl, R.sub.2 to R.sub.5 are independently hydrogen, chloro, alkyl phenylalkyl, aryl, cycloalkyl, alkoxy, alkylthio, hydroxy, amino or substituted amino, R.sub.6 is hydrogen, R.sub.7 to R.sub.10 are independently hydrogen, alkyl or alkoxy, R.sub.17 or R.sub.19 is hydrogen or alkyl, and R.sub.18 is hydrogen, alkyl, aralkyl or aryl, are described for use as stabilizers for organic materials against thermal, oxidative or light-induced degradation.
    Type: Grant
    Filed: September 20, 1993
    Date of Patent: June 27, 1995
    Assignee: Ciba-Geigy Corporation
    Inventor: Peter Nesvadba
  • Glass coating with improved adhesion and weather resistance
    Patent number: 5426204
    Abstract: A novel coating for glass with an adhesive strength of >45 Kg/cm.sup.2 and improved resistance to moisture and sunlight, which may contain opacifying pigments for decorating glass surfaces, is a hard (Shore D 84), crosslinked siloxane-urea, siloxane-urethane, siloxane-sulfide or siloxane-amide which adheres covalently to the glass surface and is resistant to scratching and delamination.
    Type: Grant
    Filed: September 12, 1994
    Date of Patent: June 20, 1995
    Assignee: Ciba-Geigy Corporation
    Inventors: Paul Harisiades, Kirtland P. Clark
  • Apparatus for producing seed crystals
    Patent number: 5423288
    Abstract: An apparatus for producing seed crystals in melts has a vertically oriented, closed vessel having a vessel base and having at least one inlet for the melt and having at least one outlet opening for the inoculated melt provided with seed crystals. A preferably annular region of the vessel wall is constructed as a cooling surface. In the interior of the vessel there is arranged a scraping unit which comprises a motor-driven rotating shaft which extends axially through the vessel as far as a point just short of the vessel base. At its end towards the vessel base, the shaft is provided with at least one scraping arm which, starting from the lower end of the shaft close to the vessel base, extends first in the direction towards the vessel wall and thence substantially parallel to the annular cooling surface and axially parallel to the drive shaft.
    Type: Grant
    Filed: February 24, 1994
    Date of Patent: June 13, 1995
    Assignee: Ciba-Geigy Corporation
    Inventors: Ricardo Schneeberger, Hans Horisberger, Rudolf Buttiker
  • Polyether polyol and polyurethane compositions protected against oxidation and core scorching
    Patent number: 5422415
    Abstract: Described are compositions protected against thermal and oxidative degradation that compriseA) a polyether polyol or mixtures of such polyols,B) at least one benzofuranone derivative of formula I, ##STR1## wherein L, G, m, R.sub.1 to R.sub.5 and R.sub.21 to R.sub.24 are as defined in claim 1,C) at least one compound from the group of the phenolic anti-oxidants, and/orD) at least one compound from the group of the amino anti-oxidants of the secondary amine type. Also polyurethane(s) (foam(s)) prepared therefrom are protected against thermal and oxidative degradation, especially against core scorching.
    Type: Grant
    Filed: February 3, 1994
    Date of Patent: June 6, 1995
    Assignee: Ciba-Geigy Corporation
    Inventor: Peter Michaelis
  • Light-stabilised copolymer compositions as paint binders
    Patent number: 5420204
    Abstract: Curable compositions comprising (a) a fluorine- or silicon-containing copolymer, (b) a (meth)acrylic copolymer and (c) at least one curing agent are described, each of the two copolymers comprising functional groups which can react with the curing agent, wherein the fluorine- or silicon-containing copolymer comprises a UV absorber which is chemically bound by reaction with the free reactive groups of the copolymer. These copolymer compositions can be used as paint binders.
    Type: Grant
    Filed: March 11, 1994
    Date of Patent: May 30, 1995
    Assignee: Ciba-Geigy Corporation
    Inventors: Andreas Valet, Roger Meuwly, Mario Slongo
  • Piperidine compounds containing silane groups for use as stabilizers for organic materials
    Patent number: 5418267
    Abstract: The present invention relates to novel piperidine compounds of the formula (I) ##STR1## in which A is e.g. a group of the formula ##STR2## where R.sub.4 is e.g. hydrogen or methyl, X.sub.3 is e.g. --O-- or --NH-- and R.sub.5' is e.g. ethylene, propylene or decamethylene, R.sub.1 is e.g. methyl, methoxy, ethoxy or OH, R.sub.2 and R.sub.3 are e.g. methyl, m+n is e.g. a number from 1 to 40, n varies e.g. from zero to 50% of the sum m+n, X.sub.1 is e.g. as defined for R.sub.1 or is a group (CH.sub.3).sub.3 SiO-- and X.sub.2 is e.g. hydrogen, methyl, ethyl, a group (CH.sub.3).sub.3 Si-- or a group ##STR3## and, when m+n is a number from 3 to 10, X.sub.1 and X.sub.2 together also form a direct bond. The compounds of the formula (I) are effective in stabilizing an organic material against thermal, oxidative and light-induced degradation.
    Type: Grant
    Filed: April 28, 1994
    Date of Patent: May 23, 1995
    Assignee: Ciba-Geigy Corporation
    Inventors: Primo Carrozza, Valerio Borzatta
  • Tetramethylpiperidine compounds for use as stabilizers for organic materials
    Patent number: 5416216
    Abstract: Novel piperidine compounds of the formula (I) ##STR1## in which R.sub.1 is e.g. hydrogen or methyl, n is e.g. 1 and A is e.g. --COR.sub.2 with R.sub.2 being C.sub.1 -C.sub.18 alkyl.The said compounds are effective as light stabilisers, heat stabilizers and oxidation stabilisers for organic materials.
    Type: Grant
    Filed: February 18, 1994
    Date of Patent: May 16, 1995
    Assignee: Ciba-Geigy Corporation
    Inventors: Roberto Scrima, Graziano Zagnoni
  • Carbohydrate substituted dibenzo[d,f][1,3,2]dioxaphosphepin stabilizers
    Patent number: 5414028
    Abstract: Carbohydrate substituted dibenzo[d,f][1,3,2]dioxaphosphepin compounds of formula I ##STR1## where A is a carbohydrate residue are effective stabilizers for polymers processed at elevated temperatures and subject to thermal or oxidative degradation.
    Type: Grant
    Filed: February 17, 1994
    Date of Patent: May 9, 1995
    Assignee: Ciba-Geigy Corporation
    Inventors: Stephen D. Pastor, Joseph E. Babiarz
  • Protected phosphine oxides
    Patent number: 5414133
    Abstract: Protected phosphine oxides of formula X are useful intermediates for the preparation of tertiary phosphine oxides and acylphosphine oxide photoinitiators.
    Type: Grant
    Filed: January 10, 1994
    Date of Patent: May 9, 1995
    Assignee: Ciba-Geigy Corporation
    Inventors: Roger G. Hall, Peter Riebli
  • Mixtures and compositions containing phenothiazines
    Patent number: 5413737
    Abstract: A mixture containing phenothiazines which is obtainable by reacting a mixture of diphenylamines comprising______________________________________ 1 to 5% by weight of a) diphenylamine 8 to 18% by weight of b) 4-tert-butyldiphenylamine 21 to 31% by weight of c) one or more compounds selected from i) 4-tert-octyldiphenylamine ii) 4,4'-di-tert-butyldiphenylamine iii) 2,4,4'-tris-tert-butyldiphenylamine 20 to 31% by weight of d) one or more compounds selected from i) 4-tert-butyl-4'-tert-octyldiphenylamine ii) 2,2'- or 2,4'-di-tert- octyldiphenylamine iii) 2,4-di-tert-butyl-4'-tert- octyldiphenylamine, and 15 to 29% by weight of e) the compound i) 4,4'-di-tert-octyldiphenylamine, or the compounds i) 4,4'-di-tert-octyldiphenylamine and ii) 2,4-di-tert-octyl-4'-tert- butyldiphenylamine, ______________________________________with 1 to 200 mol % of elemental sulfur, in the presence of 0.
    Type: Grant
    Filed: April 22, 1994
    Date of Patent: May 9, 1995
    Assignee: Ciba-Geigy Corporation
    Inventor: Samuel Evans
  • Phenyl phosphites for use as stabilizers for organic materials
    Patent number: 5414033
    Abstract: Novel compounds of the formula I and formula II ##STR1## in which R and R.sub.1, independently of one another, are hydrogen or C.sub.1 -C.sub.4 alkyl or together with the carbon atom to which they are attached form a 3,4-dehydrocyclohexylidene ring,R.sub.2 is hydrogen, C.sub.1 -C.sub.8 alkyl or C.sub.5 -C.sub.6 cycloalkyl,R.sub.3 is C.sub.1 -C.sub.8 alkyl or C.sub.5 -C.sub.6 cycloalkyl,R.sub.4, R.sub.5 and R.sub.6, independently of one another, are hydrogen or C.sub.1 -C.sub.4 alkyl, when alkyl, R.sub.4, R.sub.5 and R.sub.6 together containing 1 to 4 carbon atoms, andR.sub.7 and R.sub.8 are hydrogen or together an additional direct bond, are described for use as stabilizers for organic materials against thermal, oxidative or light-induced degradation.
    Type: Grant
    Filed: October 15, 1993
    Date of Patent: May 9, 1995
    Assignee: Ciba-Geigy Corporation
    Inventor: Peter Nesvadba