Six-membered Nitrogen Ring, E.g., Pyridine, Etc. Patents (Class 524/99)
Six-membered nitrogen ring having two or more ring nitrogen atoms (Class 524/100)
Two or more nitrogen rings (Class 524/102)
  • Photochromic naphthopyran compounds
    Patent number: 5565147
    Abstract: Described are novel reversible photochromic diaryl-3H-naphtho[2,1-b]pyran compounds having a substituted or unsubstituted, five or six member heterocyclic ring fused to the g, i, or l side of the naphthopyran. The heterocyclic ring contains an oxygen or nitrogen atom and is attached to the number 5, 6, 7, 8, 9, or 10 carbon atom of the naphtho portion of the naphthopyran. Also described are organic host materials containing such compounds. Articles such as ophthalmic lenses or other plastic transparencies that incorporate the novel naphthopyran compounds or combinations thereof with complementary photochromic compounds, e.g., spiro(indoline)oxazine-type compounds, are also described.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: October 15, 1996
    Assignee: Transitions Optical, Inc.
    Inventors: David B. Knowles, Barry Van Gemert
  • Low solvent, thermoplastic polyurethane containing solvent cement
    Patent number: 5562794
    Abstract: There is now provided a solvent cement having a total of less than 80 weight percent of solvents and a thermoplastic polyurethane elastomer as at least one of the resins dissolved in the solvent. The solvent mixture contains at least a 5- or 6-membered water miscible lactone or lactam such as N-methyl-2-pyrrolidone (NMP) in an amount of 21 weight percent or less based on the weight of all the ingredients. The reduced solvent concentration assists in lowering VOC emissions while preserving the hydrostatic burst strength mechanical property required by ASTM D 2564-88.
    Type: Grant
    Filed: March 8, 1995
    Date of Patent: October 8, 1996
    Assignee: BASF Corporation
    Inventors: Ulrich Abel, Lawrence E. James, Mark W. Waldrop
  • Low solvent, thermoplastic polyurethane containing solvent cement
    Patent number: 5563193
    Abstract: There is now provided a solvent cement having a total of less than 80 weight percent of solvents and a thermoplastic polyurethane elastomer as at least one of the resins dissolved in the solvent. The solvent mixture contains at least a 5- or 6-membered water miscible lactone or lactam such as N-methyl-2-pyrrolidone (NMP) in an amount of 21 weight percent or less based on the weight of all the ingredients. The reduced solvent concentration assists in lowering VOC emissions while preserving the hydrostatic burst strength mechanical property required by ASTM D 2564-88.
    Type: Grant
    Filed: January 25, 1996
    Date of Patent: October 8, 1996
    Assignee: BASF Corporation
    Inventors: Ulrich Abel, Lawrence E. James, Mark W. Waldrop
  • Piperidine compounds containing silane groups as stabilizers for organic materials
    Patent number: 5561179
    Abstract: Compounds of the formula (I) ##STR1## in which m and n are numbers from 1 to 50; A is --O-- or >N--R.sub.6 where R.sub.6 is e.g. hydrogen or C.sub.1 -C.sub.18 alkyl; R.sub.1 and R.sub.4, which may be identical or different, are C.sub.1 -C.sub.18 alkyl, phenyl, C.sub.1 -C.sub.8 alkoxy, OH, ONa or OK; R.sub.2 is e.g. C.sub.2 -C.sub.12 alkylene; R.sub.3 is e.g. hydrogen or C.sub.1 -C.sub.8 alkyl; R.sub.5 is e.g. a group of the formula ##STR2## in which R.sub.9 is e.g. 2,2,6,6-tetramethyl-4-piperidyl; A' has one of the meanings of A; p is e.g. 1 and R.sub.10 is e.g. C.sub.2 -C.sub.18 alkylene; X.sub.1 has one of the meanings of R.sub.1 or is a group (R.sub.27).sub.3 SiO-- where R.sub.27 is C.sub.1 -C.sub.18 alkyl; X.sub.2 is hydrogen, Na, K, C.sub.1 -C.sub.8 alkyl or a group (R.sub.27).sub.3 Si-- with R.sub.27 as defined above and, when m+n is a number from 3 to 10, X.sub.1 and X.sub.
    Type: Grant
    Filed: November 21, 1995
    Date of Patent: October 1, 1996
    Assignee: Ciba-Geigy Corporation
    Inventors: Valerio Borzatta, Primo Carrozza
  • Polysilane-based composition
    Patent number: 5556901
    Abstract: The subject-matter of the present invention is to solve the technical problem resulting from the instability in air of polysilanes. For this purpose, it proposes a polysilane-based composition, used particularly for producing silicon carbide, comprising:polysilane chains capable of being degraded by oxidation and the formation of polysiloxane-type products and/or polysilane chains suitable for being bound together directly by a reaction between Si--H and Si--X radicals, and/or indirectly through the intermediary of a crosslinking additive and by a reaction between A--X and A--H radicals, X being an olefin radical, preferably comprising 1 to 18 carbon atoms and, more preferably still, being constituted by a vinyl radical (Vi:--CH.dbd.CH.sub.2), A being an organic, organosilicic or silicic radical;and at least one antioxidant system.
    Type: Grant
    Filed: November 2, 1993
    Date of Patent: September 17, 1996
    Assignee: Flamel Technologies
    Inventor: Nathan J. Bryson
  • Azodicarboxylic acid derivatives containing hindered amine moieties as polymer stabilizers
    Patent number: 5554754
    Abstract: New azodicarboxylic acid derivatives of formula I ##STR1## where R.sub.1 is hydrogen, oxyl, hydroxyl, alkyl, allyl, benzyl, alkoxy or acyl, and X is --O-- or --NR-- where R is hydrogen or alkyl, are useful for the stabilization of polymers, particularly unsaturated elastomers, by being grafted thereon.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: September 10, 1996
    Assignee: Ciba-Geigy Corporation
    Inventors: Ramanathan Ravichandran, Ambelal R. Patel
  • Semicrystalline blends of polyalkylene terephthalates and polyarylates
    Patent number: 5552463
    Abstract: A miscible blend composition having high T.sub.g and good chemical resistance comprising, based on the total weight of the composition, from about 30 to about 90 weight % of a polyalkylene terephthalate, from about 70 to about 10 weight % of a polyarylate polymer, and an effective amount of an ester-interchange inhibitor.
    Type: Grant
    Filed: May 26, 1995
    Date of Patent: September 3, 1996
    Assignee: AlliedSignal Inc.
    Inventors: Murali K. Akkapeddi, Seng-Shiu Chung
  • Polymer stabilizers containing both hindered amine and hydroxylamine moieties
    Patent number: 5552464
    Abstract: Compounds possessing both a hindered amine moiety, such as a derivative of 2,2,6,6-tetramethylpiperidine, and a hydroxylamine moiety where the N-hydroxy group is not attached to a nitrogen atom in a piperidine ring are valuable stabilizers for protecting polymer compositions against the deleterious effects of actinic light and from the adverse effects of high temperature polymer processing environments.
    Type: Grant
    Filed: January 12, 1995
    Date of Patent: September 3, 1996
    Assignee: Ciba-Geigy Corporation
    Inventors: Joseph Suhadolnik, Ramanathan Ravichandran, Valerio Borzatta, Graziano Vignali
  • Radiation-resistant polypropylene resin composition
    Patent number: 5548007
    Abstract: A radiation-resistant polypropylene resin composition is disclosed which comprises a polypropylene having a substantially syndiotactic structure, and if desired, a phosphorus-containing anti-oxidant, an amine-containing anti-oxidant and/or a nucleating agent. Molded articles obtained from this resin composition can be utilized as containers for foods and medicines, and their physical properties scarcely deteriorate during sterilization by radiation.
    Type: Grant
    Filed: March 7, 1995
    Date of Patent: August 20, 1996
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Tadashi Asanuma, Shigeru Kimura, Nobutaka Uchikawa, Tetsunosuke Shiomura
  • Radiation-resistant polypropylene resin composition
    Patent number: 5548008
    Abstract: A radiation-resistant polypropylene resin composition is disclosed which comprises a polypropylene having a substantially syndiotactic structure, and if desired, a phosphorus-containing anti-oxidant, an amine-containing anti-oxidant and/or a nucleating agent. Molded articles obtained from this resin composition can be utilized as containers for foods and medicines, and their physical properties scarcely deteriorate during sterilization by radiation.
    Type: Grant
    Filed: March 24, 1995
    Date of Patent: August 20, 1996
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Tadashi Asanuma, Shigeru Kimura, Nobutaka Uchikawa, Tetsunosuke Shiomura
  • Photochromic products and method for their preparation
    Patent number: 5543533
    Abstract: Photochromic products belonging to the group of chromenes having general formula (I): ##STR1##
    Type: Grant
    Filed: June 2, 1994
    Date of Patent: August 6, 1996
    Assignee: Great Lakes Chemical Italia S.r.l.
    Inventors: Pietro Allegrini, Nereo Nodari, Luciana Crisci, Vincenzo Malatesta
  • Rubber composition
    Patent number: 5534569
    Abstract: Heat generation of a rubber composition can be lowered by incorporating to the composition a compound of the formula, (I), (II) or (III), ##STR1## where A is an aromatic group, hydantoin ring or C.sub.0-18 straight chain hydrocarbon group, B is an aromatic group, X is hydroxy or amino, Y is pyridyl or hydrozino.
    Type: Grant
    Filed: March 8, 1995
    Date of Patent: July 9, 1996
    Assignee: Bridgestone Corporation
    Inventor: Akiko Etoh
  • Polyoxymethylene resin compositions having improved weatherability
    Patent number: 5523341
    Abstract: The present invention is aimed at improving the weathering resistance of a polyoxymethylene resin without adversely affecting its excellent mechanical properties. The invention comprises incorporating into polyoxymethylene a UV absorber and/or a light stabilizer, along with a grafted copolymer containing epoxy-containing olefinic monomer units and/or a polymer containing oxazolyl groups.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: June 4, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Toshikazu Kobayashi, Ken-ichi Shinohara
  • Complexes of morpholine derivatives with keto-acids as corrosion inhibitors
    Patent number: 5519074
    Abstract: The invention relates to crystalline complex compounds of formula I ##STR1## wherein the general symbols are as defined in claim 1, as corrosion inhibitors in coating compositions for protecting metallic surfaces.
    Type: Grant
    Filed: January 12, 1995
    Date of Patent: May 21, 1996
    Assignee: Ciba-Geigy Corporation
    Inventors: Andreas Kramer, Adalbert Braig
  • Compositions stabilized with 5-thio-substituted benzotriazole UV-absorbers
    Patent number: 5516914
    Abstract: 2-(2-Hydroxyphenyl)-2H-benzotriazole UV-absorbers substituted at the 5-position of the benzo ring by a thioether 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: May 14, 1996
    Assignee: Ciba-Geigy Corporation
    Inventors: Roland A. E. Winter, Volker H. von Ahn, Tyler A. Stevenson, Mark S. Holt, Ramanathan Ravichandran
  • Stabilized resin composition
    Patent number: 5510404
    Abstract: A resin composition comprising a resin, a hindered piperidinyloxy compound of the formula (I): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are independently a C.sub.1 -C.sub.4 alkyl group and Z is a hydrogen atom or an organic group having at least one carbon atom, and a hypophosphite compound of the formula:X.sub.a (H.sub.2 PO.sub.2).sub.b (II)wherein X is a metal ion, an ammonium ion or a phosphonium ion, a and b are positive numbers provided that they satisfy the equation: a.times.c=b in which c is a valency of X, wherein a weight ratio of the hypophosphite compound (II) to the hindered piperidinyloxy compound (II) is at least 0.001, which has good heat stability and weather resistance.
    Type: Grant
    Filed: September 14, 1993
    Date of Patent: April 23, 1996
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Kiyohiko Nakae, Kozo Kotani, Taiichi Sakaya, Makoto Nakagahara
  • Silica reinforced rubber composition and tire with tread thereof
    Patent number: 5504137
    Abstract: The present invention relates to a rubber composition containing silica reinforcement and to pneumatic tires having treads comprised of such rubber composition.A rubber composition comprises at least one elastomer, silica, carbon black and a silica coupler comprised of nicotinamide.
    Type: Grant
    Filed: March 10, 1995
    Date of Patent: April 2, 1996
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Paul H. Sandstrom, Lawson G. Wideman
  • Monoesters of rosin acid
    Patent number: 5504127
    Abstract: The present invention relates to monoesters of rosin acids which are useful as a total or partial replacement for extender or processing oil in rubber formulations. Addition of these monoesters of rosin acid improve the modulus and tear of the vulcanizate. The monoesters are of the formula: ##STR1## wherein R.sup.1 and R.sup.2 are the same or different hydrocarbon radicals selected from the group consisting of saturated alkyl and cycloalkyl radicals containing 3 to 20 carbon atoms, aryl radicals containing 6 carbon atoms and aralkyl radicals containing 7 to 20 carbon atoms.
    Type: Grant
    Filed: April 10, 1995
    Date of Patent: April 2, 1996
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Lawson G. Wideman, Paul H. Sandstrom
  • Polyacetal resin composition
    Patent number: 5502093
    Abstract: Polyacetal resin compositions have excellent weather resistance and environment resistance, which suppress resin deterioration/discoloration, crack and discoloration caused by additive bleeding during extended exposure to light while maintaining the initial molded product surface condition. The polyacetal compositions include a blend of (A) 100 parts by weight of a polyacetal resin, with the specific amounts of (B) an acrylic resin, (C) an oxyalkylene polymer having chains of 2 to 8 consecutive carbon atoms, (D) a UV absorber and (E) two kinds of the hindered amine compounds each having a different molecular weight.
    Type: Grant
    Filed: November 21, 1994
    Date of Patent: March 26, 1996
    Assignee: Polyplastics Co., Ltd.
    Inventors: Toru Katsumata, Nobuyuki Matsunaga
  • Derivatives of 2,2,6,6-tetramethyl-4-piperidinol for use as light stabilizers, heat stabilizers and oxidation stabilizers for organic materials
    Patent number: 5496875
    Abstract: The present invention relates to novel piperidine compounds of the formula (I) V5 V pV ##STR1## in which R.sub.1, R.sub.2 and R.sub.3 are as defined in the text. The compounds of the invention can be used as fight stabilizers, heat stabilizers and oxidation stabilizers for organic materials, in particular synthetic polymers.
    Type: Grant
    Filed: July 11, 1994
    Date of Patent: March 5, 1996
    Assignee: Ciba-Geigy Corporation
    Inventors: Valerio Borzatta, Roberto Scrima, Primo Carrozza
  • Increasing the molecular weight of polyamides
    Patent number: 5496920
    Abstract: An increase in the molecular weight of newly produced polyamides and recycled polyamide materials can be achieved by heating to above the melting point or glass transition point and adding of a bismaleimide and a sterically hindered hydroxyphenyl-alkyl-phosphonic acid ester or half-ester.
    Type: Grant
    Filed: May 27, 1994
    Date of Patent: March 5, 1996
    Assignee: Ciba-Geigy Corporation
    Inventors: Rudolf Pfaendner, Kurt Hoffmann, Heinz Herbst
  • Color-stable polycarbonate composition and articles molded therefrom
    Patent number: 5484828
    Abstract: A thermoplastic polycarbonate molding composition free from organo phosphorus compounds and having an improved resistance to discoloration caused by exposure to High Intensity Discharge (HID) light and heat is disclosed. Accordingly, the molding composition contains (co)polycarbonate resin, a dimeric benzotriazole and an ester of a 3,5-di-tert-butyl-4-hydroxyhydrocinnamic acid. In a preferred embodiment, a sheet made of (co)polycarbonate resin is rendered improved resistance to discoloration by having applied to at least one of its surfaces an adherent protective film prepared from the polycarbonate composition of the invention.
    Type: Grant
    Filed: November 18, 1994
    Date of Patent: January 16, 1996
    Assignee: Bayer Corporation
    Inventors: Kevin F. Dunay, Winfried G. Paul, Sivaram Krishnan
  • Light-stabilized polymer microparticles
    Patent number: 5476882
    Abstract: Light-stabilized polymer microparticles, which contain at least one light stabilizer, and processes for the preparation of these microparticles by polymerization of suitable monomers, at least a part of the polymerization being carried out in the presence of at least one light stabilizer, are described. The polymer microparticles can be used in coating compositions which comprise a disperse phase containing these particles and a liquid continuous phase.Coatings and finishes based on the compositions according to the invention are distinguished by improved weathering resistance, in particular by a high light stability.
    Type: Grant
    Filed: October 18, 1993
    Date of Patent: December 19, 1995
    Assignee: Ciba-Geigy Corporation
    Inventors: Godwin Berner, Manfred Rembold, Jean Rody, Mario Slongo
  • Method for making radiation curable silicon containing polyacrylate hardcoat compositions and compositions made thereby
    Patent number: 5468789
    Abstract: A method is provided for making curable silicon containing acrylate silicone hardcoat compositions which employ an anaerobic gelation inhibitor such as galvinoxyl. Devolatilizing of an aqueous/organic solvent mixture from the silicon containing acrylate hardcoat formulation is conducted in an inert atmosphere. Acrylate hardcoat compositions imparting improved weathering resistance to thermoplastic substrates also are provided.
    Type: Grant
    Filed: September 12, 1994
    Date of Patent: November 21, 1995
    Assignee: General Electric Company
    Inventors: Larry N. Lewis, George F. Medford, Arnold Factor
  • Solid blends of stabilizers for polymers
    Patent number: 5462984
    Abstract: Solid stabilizers for polymers comprises a blend of (a) organic polymer and (b) at least one silicon-containing compound having a sterically hindered amine group in the molecule in quantities of between 40% and 50% by weight of the final solid blend.
    Type: Grant
    Filed: February 24, 1995
    Date of Patent: October 31, 1995
    Assignee: Enichem Synthesis S.p.A.
    Inventors: Carlo Neri, Silvestro Costanzi, Mariangela Angaroni
  • Electrically-conductive and ionically-conductive polymeric networks and their preparation
    Patent number: 5462696
    Abstract: The present invention relates to polymeric networks that can be made electrically conductive in bulk or which have a surface which is electrically conductive, and which networks exhibit resistivities in the ohm to kilo-ohm range. One aspect of the present invention, then, comprises an electrically conductive polymeric network comprising a cured thermosetting polymeric network which contains an oxidized additive comprising one or more of an oxidizable aniline, thiophene, or pyrrole additive, which additive was oxidized with an oxidizing agent in situ in the cured polymeric network.
    Type: Grant
    Filed: January 10, 1994
    Date of Patent: October 31, 1995
    Assignee: Three Bond Company, Ltd.
    Inventors: Vincent D. McGinniss, Albert R. Bunk, Hiroyuki Mikuni
  • Photochromic naphthopyran compounds
    Patent number: 5458815
    Abstract: Described are novel reversible photochromic naphthopyran compounds, examples of which are compounds substituted at the 3 position of the pyran ring with (i) an aryl substituent and (ii) a phenyl substituent having a 5- or 6-member heterocyclic ring fused at the number 3 and 4 carbon atoms of the phenyl substituent. Also described are organic host materials that contain or that are coated with such compounds. Articles such as ophthalmic lenses or other plastic transparencies that incorporate the novel naphthopyran compounds or combinations thereof with complementary photochromic compounds, e.g., spiro(indoline) type compounds, are also described.
    Type: Grant
    Filed: September 8, 1994
    Date of Patent: October 17, 1995
    Assignee: Transitions Optical, Inc.
    Inventor: David B. Knowles
  • Stabilization of polymeric organic materials by using synergistic mixtures comprising sterically hindered cyclic amines and derivatives of 3-pyrazolidinone or 1,2,4-triazolidine-3,5-dione
    Patent number: 5457143
    Abstract: The present invention relates to synergistic mixtures for stabilising polymeric organic materials against light, heat and oxidation; said synergistic mixtures contain sterically hindered cyclic amines and particular derivatives of 3-pyrazolidinone or 1,2,4-triazolidine-3,5-dione. In addition, the present invention relates to some new derivatives of 3-pyrazolidinone or 1,2,4-triazolidine-3,5-dione.
    Type: Grant
    Filed: March 28, 1994
    Date of Patent: October 10, 1995
    Assignee: Ciba-Geigy Corporation
    Inventors: Roberto Scrima, Giampiero Vessa
  • Liquid adhesive for electronic parts and process for forming insulating adhesive layer using the same
    Patent number: 5446080
    Abstract: A liquid adhesive comprising a dispersion of the following component (b) in a solution of the following component (a) in an organic solvent:(a) a piperazinylethylaminocarbonyl-containing butadiene-acrylonitrile copolymer(b) a maleimide compound having at least two maleimide groups.An insulating pattern or insulating layer is formed by applying the liquid adhesive onto an electronic part by a dispensing or screen printing method, followed by thermally curing.
    Type: Grant
    Filed: October 27, 1994
    Date of Patent: August 29, 1995
    Assignee: Tomoegawa Paper Co., Ltd.
    Inventors: Takeshi Shima, Katsuji Nakaba, Masaharu Kobayashi, Yukinori Sakumoto
  • Monoesters of rosin acid
    Patent number: 5444109
    Abstract: The present invention relates to monoesters of rosin acids which are useful as a total or partial replacement for extender or processing oil in rubber formulations. Addition of these monoesters of rosin acid improve the modulus and tear of the vulcanizate. The monoesters are of the formula: ##STR1## wherein R.sup.1 and R.sup.2 are the same or different hydrocarbon radicals selected from the group consisting of saturated alkyl and cycloalkyl radicals containing 3 to 20 carbon atoms, aryl radicals containing 6 carbon atoms and aralkyl radicals containing 7 to 20 carbon atoms.
    Type: Grant
    Filed: June 7, 1993
    Date of Patent: August 22, 1995
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Lawson G. Wideman, Paul H. Sandstrom
  • 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
  • N-(.beta.-carbony- and .beta.-cyanovinyl)-2,2,6,6-tetramethyl-piperidine derivatives
    Patent number: 5434202
    Abstract: N-(.beta.-carbonyl- and .beta.-cyanovinyl)-2,2,6,6-tetramethylpiperidine derivatives of the formula I ##STR1## where R.sup.1 is COOR.sup.3, COR.sup.4, CONR.sup.4 R.sup.5 or CN,R.sup.2 has the meanings of R.sup.1 or is C.sub.1 -C.sub.12 -alkyl or hydrogen,R.sup.3 is hydrogen, C.sub.1 -C.sub.8 -alkyl, C.sub.5 -C.sub.8 -cycloalkyl, C.sub.3 -C.sub.5 -alkenyl or phenyl which can be mono- to trisubstituted by C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -alkoxycarbonyl, halogen, hydroxyl, phenoxy, phenyl, tolyl or xylyl,R.sup.4 and R.sup.5 are each hydrogen, C.sub.1 -C.sub.12 -alkyl, C.sub.5 -C.sub.8 -cycloalkyl or phenyl which can be mono- to trisubstituted by C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -alkoxycarbonyl, halogen, hydroxyl, phenoxy, phenyl, tolyl or xylyl,n is 1-4,X and A for each individual n have been defined in the specification.
    Type: Grant
    Filed: June 3, 1994
    Date of Patent: July 18, 1995
    Assignee: BASF Aktiengesellschaft
    Inventors: Alfred Krause, Alexander Aumueller, Hubert Trauth
  • Aqueous size for fiber reinforced high temperature composites
    Patent number: 5430096
    Abstract: Stable aqueous size of ammonia-and/or amine-neutralized poly(amide-acid) of certain aromatic dianhydrides with certain aromatic diamines.
    Type: Grant
    Filed: April 28, 1994
    Date of Patent: July 4, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Sang-Hak Hwang, Thomas J. Proffitt, Jr.
  • 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
  • Agricultural film
    Patent number: 5414030
    Abstract: Disclosed is an agricultural film produced by forming into a film a composition comprising (a) a polyolefin resin, (b) a dripping agent, (c) a heat stabilizer and (d) a weather resistance improving agent and (e) a solution of a hypophosphite compound in an organic solvent.
    Type: Grant
    Filed: December 22, 1992
    Date of Patent: May 9, 1995
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Kozo Kotani, Taiichi Sakaya
  • Highly antioxidant olefinic resin composition
    Patent number: 5401797
    Abstract: A highly antioxidant resin composition containing a resin, a solution of a hypophosphite compound in an organic solvent, a heat stabilizer and a hindered amine base weathering stabilizer, which has improved heat stability and weather resistance. The hypophosphite compound is preferably dissolved in a polyvalent alcohol having a molecular weight of not more than 50,000.
    Type: Grant
    Filed: October 23, 1991
    Date of Patent: March 28, 1995
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Kozo Kotani, Taiichi Sakaya
  • Monomeric hindered amine esters of monocarboxylic resin acid and olefin polymer compositions stabilized therewith
    Patent number: 5397820
    Abstract: Disclosed are monomeric hindered amine esters of monocarboxylic resin acids and olefin polymer compositions stabilized therewith.
    Type: Grant
    Filed: August 24, 1992
    Date of Patent: March 14, 1995
    Assignee: Himont Incorporated
    Inventor: Charles M. Wright
  • Derivatives of N-hals-substituted amic acid hydrazides
    Patent number: 5397821
    Abstract: N-(2,2,6,6-tetraalkyl-4-piperidinyl)amic acid hydrazides contain a light stabilizing group, a heat stabilizing group and an amic acid hydrazide functionality in the same molecule. The amic acid hydrazide functionality in the compounds enhances the photooxidative stabilizing properties of the hindered amine groups and contributes thermal and oxidative stabilizing and metal complexing properties to the compounds. The novel compounds are excellent light stabilizers for polyolefins, have low volatility and are not readily lost from polymeric systems via volatilization, migration or extraction.
    Type: Grant
    Filed: April 28, 1994
    Date of Patent: March 14, 1995
    Assignee: Elfatochem North America, Inc.
    Inventors: Ronald E. MacLeay, Harold C. Lange
  • Charge-transfer complexes with N-aromatic compounds, the preparation thereof and the use thereof
    Patent number: 5393606
    Abstract: Charge-transfer complexes of formula I(A.sup..crclbar.).sub.n B.sup.n.sym. (I)whereina) n is 1 or 2,b) A is the radical anion of a compound of formula II or of a mixture of compounds of formula II ##STR1## wherein the substituents R are the same and are H or C.sub.1 -C.sub.4 alkyl, or adjacent substituents R together form --(CH.sub.2).sub.3 -- or --(CH.sub.2).sub.4 --;R.sub.1 is H or C.sub.1 -C.sub.4 alkyl;X.sub.1 is .dbd.N--CN;and X.sub.2, X.sub.3 and X.sub.4 are .dbd.O or .dbd.N--CN, andc) when n=1, B is the monovalent radical cation and when n=2, B is the divalent radical cation of an N-aromatic compound having a total of from 1 to 5 aromatic rings that are unsubstituted or substituted by halogen, C.sub.1 -C.sub.4 alkyl or by C.sub.1 -C.sub.4 alkoxy, at least one ring containing at least one group --NR.sub.2 -- or [.dbd.N.sup.+ R.sub.2 --] I.sup.- wherein R.sub.2 is C.sub.1 -C.sub.4 alkyl or benzyl.
    Type: Grant
    Filed: May 25, 1993
    Date of Patent: February 28, 1995
    Assignee: Ciba-Geigy Corporation
    Inventor: Peter Chetcuti
  • Azodicarboxylic acid derivatives containing hindered amine moieties as polymer stabilizers
    Patent number: 5380828
    Abstract: New azodicarboxylic acid derivatives of formula I ##STR1## where R.sub.1 is hydrogen, oxyl, hydroxyl, alkyl, allyl, benzyl, alkoxy or acyl, and X is --O-- or --NR-- where R is hydrogen or alkyl, are useful for the stabilization of polymers, particularly unsaturated elastomers, by being grafted thereon.
    Type: Grant
    Filed: April 7, 1994
    Date of Patent: January 10, 1995
    Assignee: Ciba-Geigy Corporation
    Inventors: Ramanathan Ravichandran, Ambelal R. Patel
  • Addition-curable silicone adhesive compositions and N-heterocyclic silane adhesion promoters
    Patent number: 5380846
    Abstract: Addition-curable platinum group metal catalyzed silicone compositions are provided which utilize an N-heterocyclic adhesion promoter, such as bis(trimethoxysilyltrimethylene) 2,6 pyridine dicarboxylate. Cohesive bonding is effected on both plastic and metal substrates at temperatures of less than 100.degree. C. and in less than 1 hour.
    Type: Grant
    Filed: June 13, 1994
    Date of Patent: January 10, 1995
    Assignee: General Electric Company
    Inventor: Judith Stein
  • Weather-resistant thermoplastic resin composition
    Patent number: 5378745
    Abstract: A weather-resistant thermoplastic resin composition excellent in processing stability is provided which comprises 100 parts by weight of a mixture of 40-100 parts by weight of a vinyl chloride polymer and 0-60 parts by weight of a polymer containing no chlorine and having a glass transition temperature of 100.degree.-200.degree. C.; 4-25 parts by weight of an impact strength modifier containing no double bond; and 0.1-1.0 part by weight of a hindered amine light stabilizer. Molded articles made from this composition are especially excellent in weather resistance and are useful as pipes outdoors or building materials.
    Type: Grant
    Filed: January 21, 1994
    Date of Patent: January 3, 1995
    Inventors: Yoshihiro Nakatsuji, Masayuki Yoshihara, Hiroaki Maruyama, Toshio Igarashi
  • Compositions stabilized by o-hydroxyphenyl-1,3,5-triazines and sterically hindered amines
    Patent number: 5376710
    Abstract: Compounds which comprise at least one group of the formula I or II ##STR1## and at least one polyalkylpiperidine group of the formula III ##STR2## in which R and R.sub.1 to R.sub.6 have the meaning indicated in claim 1, are effective stabilizers for organic materials against damage by light, oxygen and heat.
    Type: Grant
    Filed: March 10, 1993
    Date of Patent: December 27, 1994
    Assignee: Ciba-Geigy Corporation
    Inventors: Mario Slongo, Jean-Luc Birbaum, Jean Rody, Andreas Valet
  • Substituted 1-hydroxy-2,6-diaryl-4-acyloxypiperidines or 1-hydroxy-2,6-diaryl-4-acylaminopiperidines and stabilized compositions
    Patent number: 5371125
    Abstract: Substituted 1-hydroxy-2,6-diaryl-4-acyloxypiperidines or 1-hydroxy-2,6-diaryl-4-acylaminopiperidines of formula I ##STR1## wherein n is 1-4, Ar.sub.1 and Ar.sub.2 are independently aryl or substituted aryl, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are independently hydrogen, alkyl, substituted alkyl, alkenyl, aryl or substituted aryl, X is --O-- or --NE--, E is hydrogen, alkyl or cycloalkyl and T is an n-valent aliphatic or aromatic hydrocarbon radical, are effective in stabilizing organic materials against the deleterious effects of oxygen, heat and actinic radiation.
    Type: Grant
    Filed: September 8, 1993
    Date of Patent: December 6, 1994
    Assignee: Ciba-Geigy Corporation
    Inventors: Glen T. Cunkle, Ramanathan Ravichandran, Donald J. Sabrsula
  • Radiation-resistance propylene polymer composition and radiation sterilized articles therefrom
    Patent number: 5371124
    Abstract: Disclosed is a radiation resistant propylene polymer composition comprising a propylene polymer material and generally from about 0.1 to about 5 pph, of the propylene polymer material, of a rosin material. A hindered amine is present when the concentration of the rosin material is low, i.e., below 1.0 pph. At higher concentrations of rosin material, the hindered amine is optional. Radiation sterilized articles in which at least part of the material construction thereof comprises said radiation resistant propylene polymer composition are also disclosed.
    Type: Grant
    Filed: May 10, 1993
    Date of Patent: December 6, 1994
    Assignee: Himont Incorporated
    Inventor: Joel M. Cooke
  • Photochromic naphthopyrans
    Patent number: 5369158
    Abstract: Described are novel reversible photochromic naphthopyran compounds substituted at the number eight carbon atom on the naphtho portion of the naphthopyran ring with, for example, a methoxy group. Also described are organic host materials that contain or that are coated with such compounds. Articles such as ophthalmic lenses or other plastic transparencies that incorporate the novel naphthopyran compounds are also described.
    Type: Grant
    Filed: June 2, 1993
    Date of Patent: November 29, 1994
    Assignee: Transitions Optical, Inc.
    Inventor: David B. Knowles
  • Addition-curable silicone adhesive compositions and N-heterocyclic silane adhesion promoters
    Patent number: 5362781
    Abstract: Addition-curable platinum group metal catalyzed silicone compositions are provided which utilize an N-heterocyclic adhesion promoter, such as bis(trimethoxysilyltrimethylene) 2,6 pyridine dicarboxylate. Cohesive bonding is effected on both plastic and metal substrates at temperatures of less than 100.degree. C. and in less than 1 hour.
    Type: Grant
    Filed: December 13, 1993
    Date of Patent: November 8, 1994
    Assignee: General Electric Compay
    Inventor: Judith Stein
  • Polypropylene resin composition having improved coating property
    Patent number: 5354795
    Abstract: a polypropylene resin composition comprising:(A) a composition of (a) a crystallineethylene-propylene block copolymer, (b) a thermoplastic elastomerhaving a substantially saturated main chain, and (c) an inorganic filler;(B) (i) a hindered nitrogen-free phenolic antioxidant;(ii) a nitrogen-containing hindered phenolic antioxidant;(iii) a benzotriazole ultraviolet absorber; and(iv) a hindered amine light stabilizer having a molecular weight of 500 or more or having no N-H bond and having a molecular weight of less than 500, or(i') a hindered phenolic antioxidant;(ii') an organic sulfur type antioxidant; and(iii') a hindered amine light stabilizer having no N-H bond.
    Type: Grant
    Filed: May 17, 1993
    Date of Patent: October 11, 1994
    Assignee: UBE Industries, Ltd.
    Inventors: Kohhei Ueno, Yoshifumi Nakano, Kazuyoshi Tanaka, Yasuo Kita
  • Hindered amine light stabilizer hydrazides
    Patent number: 5352719
    Abstract: New and novel stabilized polymer compositions and processes for preparing them which employ new and novel carboxylic acid hydrazides bearing a 2,2,6,6-tetra-alkyl-4-piperidine ring and new and novel polymeric compositions stabilized therewith are provided.
    Type: Grant
    Filed: March 12, 1992
    Date of Patent: October 4, 1994
    Assignee: Elf Atochem North America, Inc.
    Inventor: Terry N. Myers
  • High density polyethylenes with improved processing stability
    Patent number: H1600
    Abstract: Phillips' process high density polyethylene resin compositions having improved processing stability are obtained using a combination of stabilizers comprised of a hindered phenol and a phosphite compound having three cyclic phosphite moieties linked via a nitrogen atom. More specifically, the phosphite compound is 2, [[2,4,8,10-tetrakis(1,1-dimethylethyl)dibenzo[d,f][1,3,2]-dioxaphosphepin- 6-yl]oxy]-N,N-bis [2-[[2,4,8,10-tetrakis (1,1-dimethylethyl) dibenzo[d,f][1,3,2]dioxaphosphenpin-6-yl]oxy]-ethyl]ethanamine. With the HDPE compositions stabilized in accordance with the invention, it is possible to eliminate undesirable rapid changes in melt viscosity which can occur when Phillips' process HDPE resins are processed under conditions of high shear.
    Type: Grant
    Filed: March 27, 1995
    Date of Patent: October 1, 1996
    Assignee: Quantum Chemical Company
    Inventors: Stephen M. Imfeld, Daryl L. Stein