Additional Phosphorus Containing Ring Patents (Class 558/76)
  • Publication number: 20150126762
    Abstract: This invention relates to a process for producing compounds derived from 9,10-Dihydro-9-Oxa-10-Phosphaphenantrene-10-oxide (DOPO). In particular, the invention relates to producing DOPO-derived compounds by reacting DOPO with diol compounds in the presence of a catalyst. This invention also relates to DOPO derived composition containing a high melting point diastereomer. The DOPO derived compounds may be useful as flame-retardants.
    Type: Application
    Filed: January 12, 2015
    Publication date: May 7, 2015
    Inventors: Qiang Yao, Junuzo Wang, Arthur G. Mack
  • Patent number: 9000077
    Abstract: A phosphazene compound having a vinyl group is manufactured by a reaction between a vinyl compound and a phosphazene compound having a hydroxyl group and added to a resin composition for manufacturing a prepreg or a resin film so as to be applicable to copper-clad laminates and printed circuit boards to thereby achieve satisfactory circuit laminate properties, namely low coefficient of thermal expansion, low dielectric properties, heat resistant, fire resistant, and halogen-free.
    Type: Grant
    Filed: June 19, 2013
    Date of Patent: April 7, 2015
    Assignee: Elite Material Co., Ltd.
    Inventor: Chen-Yu Hsieh
  • Publication number: 20150051327
    Abstract: The main objection of the present invention is to provide a halogen-free flame retardant for resins which has a high heat resistance and is capable of exhibiting excellent flame retardance while maintaining a good transparency. The present invention provides a flame retardant for resins which includes a condensed phosphonic acid ester having a specific chemical structure, a flame-retarded resin composition containing the same, and a molded article made from the composition.
    Type: Application
    Filed: July 26, 2012
    Publication date: February 19, 2015
    Applicant: MARUBISHI OIL CHEMICAL CO., LTD.
    Inventors: Junichi Kobayashi, Akira Ishikawa, Kai Miwa, Shigeto Iguchi
  • Publication number: 20140357885
    Abstract: The present invention relates to novel, halogen-free flame retardant derived from 9,10-Dihydro-9-Oxa-10-Phosphaphenantrene-10-oxide (DOPO). This invention also relates to the use of the halogen free DOPO derived flame retardant in polymers.
    Type: Application
    Filed: August 20, 2014
    Publication date: December 4, 2014
    Inventors: YU LI ANGELL, KIMBERLY M. WHITE, SCOTT E. ANGELL, ARTHUR G. MACK
  • Publication number: 20140343183
    Abstract: A group of novel compounds containing one or more amino substituted DOPO (9,10-dihydro-9-oxa-phosphaphenthren-10-oxide) moieties. The compounds were found to have good flame retardant properties and also good thermal stability, which makes them particularly suitable as flame retardant additives for various thermoplastic polymers. In particular, they can be incorporated in a polyurethane foam.
    Type: Application
    Filed: August 6, 2012
    Publication date: November 20, 2014
    Applicants: FRITZ NAUER AG, EMPA EIDGENOSSISCHE MATERIALPRUFUNGS- UND FORSCHUNGSANSTALT
    Inventors: Sabyasachi Gaan, Matthias Neisius, Primo Mercoli, Shuyu Liang, Henri Mispreuve, Reinold Nascher
  • Publication number: 20140323624
    Abstract: A phosphazene compound having a vinyl group is manufactured by a reaction between a vinyl compound and a phosphazene compound having a hydroxyl group and added to a resin composition for manufacturing a prepreg or a resin film so as to be applicable to copper-clad laminates and printed circuit boards to thereby achieve satisfactory circuit laminate properties, namely low coefficient of thermal expansion, low dielectric properties, heat resistant, fire resistant, and halogen-free.
    Type: Application
    Filed: June 19, 2013
    Publication date: October 30, 2014
    Inventor: CHEN-YU HSIEH
  • Publication number: 20140316032
    Abstract: The present invention relates to the use of aromatic P—N-compounds in flame retardant polymer compositions. These compositions are especially useful for the manufacture of flame retardant compositions based onthermoplastic polymers, especially polyolefin homo- and copolymers, polycondensates, such as polyamines or polyesters and duroplastic polymers, such as polyepoxides.
    Type: Application
    Filed: November 8, 2012
    Publication date: October 23, 2014
    Applicant: BASF SE
    Inventors: Rainer Xalter, Michael Roth, Manfred Doering, Ciesielski Michael, Sebastian Wagner
  • Patent number: 8796389
    Abstract: The present invention relates to a method for thermal crosslinking of adhesives and also to products produced with these adhesives. An object of the invention is to provide a method for thermal crosslinking of adhesives where the crosslinking is covalent and (initiated by a chemical or physical stimulus) reversible. As and when required, the crosslinking method can also be configured to result in a covalent, irreversible network.
    Type: Grant
    Filed: June 15, 2012
    Date of Patent: August 5, 2014
    Assignee: TESA SE
    Inventors: Alexander Prenzel, Sarah Bamberg
  • Patent number: 8703882
    Abstract: Phosphorus-containing benzoxazine-based bisphenols and derivatives thereof are disclosed. The phosphorus-containing benzoxazine-based bisphenols are prepared by reacting DOPO with benzoxazine to form the phosphorus-containing benzoxazine-based bisphenols. The phosphorus-containing benzoxazine-based bisphenols can further to form advanced epoxy resins. The advanced epoxy resins can further be cured to form flame retardant epoxy thermosets.
    Type: Grant
    Filed: December 28, 2010
    Date of Patent: April 22, 2014
    Assignee: National Chunghsing University
    Inventors: Ching-Hsuan Lin, Hung-Tse Lin, Sheng Lung Chang, Yu-Ming Hu
  • Patent number: 8586699
    Abstract: Phosphorus-containing compounds useful for flame retardant epoxy resins are disclosed. The flame retardant epoxy resins may be used to make electrical laminates. This invention is particularly useful in end use applications in which a low bromine or low halogen content is required or desired.
    Type: Grant
    Filed: February 15, 2012
    Date of Patent: November 19, 2013
    Assignee: Dow Global Technologies LLC
    Inventor: Joesph Gan
  • Publication number: 20130296597
    Abstract: A phosphorus-containing oligomer is represented by formula (1): (R1 represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or a phenyl group; n is the number of repeating units and an integer of 1 or more; X is a structural unit represented by structural formula (x1) or (x2) below; Y is a hydrogen atom, a hydroxyl group, or a structural unit represented by the formula (x1) or (x2); and, in the formula (x1) or (x2), R2, R3, R4, and R5 each independently represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, a phenyl group, or an aralkyl group), wherein the content of components whose n is 2 or more in the formula (1) is in the range of 5% to 90% in peak area in GPC measurement.
    Type: Application
    Filed: July 1, 2013
    Publication date: November 7, 2013
    Inventors: Koji Hayashi, Yutaka Satou
  • Patent number: 8563661
    Abstract: Phosphorus-containing compounds useful for flame retardant epoxy resins are disclosed. The flame retardant epoxy resins may be used to make electrical laminates. This invention is particularly useful in end use applications in which a low bromine or low halogen content is required or desired.
    Type: Grant
    Filed: January 9, 2013
    Date of Patent: October 22, 2013
    Assignee: Dow Global Technologies LLC
    Inventor: Joseph Gan
  • Patent number: 8512466
    Abstract: Phosphorus-containing oligomer is represented by formula (1): (R1 represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, or a phenyl group; n is the number of repeating units and an integer of 1 or more; X is a structural unit represented by structural formula (x1) or (x2) below; Y is a hydrogen atom, a hydroxyl group, or a structural unit represented by the formula (x1) or (x2); and, in the formula (x1) or (x2), R2, R3, R4, and R5 each independently represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, a phenyl group, or an aralkyl group), wherein the content of components whose n is 2 or more in the formula (1) is in the range of 5% to 90% in peak area in GPC measurement.
    Type: Grant
    Filed: February 1, 2011
    Date of Patent: August 20, 2013
    Assignee: DIC Corporation
    Inventors: Koji Hayashi, Yutaka Satou
  • Publication number: 20130123401
    Abstract: Phosphorus-containing compounds useful for flame retardant epoxy resins are disclosed. The flame retardant epoxy resins may be used to make electrical laminates. This invention is particularly useful in end use applications in which a low bromine or low halogen content is required or desired.
    Type: Application
    Filed: January 9, 2013
    Publication date: May 16, 2013
    Applicant: Dow Global Technologies LLC
    Inventor: Dow Global Technologies LLC
  • Patent number: 8440771
    Abstract: Phosphorus-containing compounds useful for flame retardant epoxy resins are disclosed. The flame retardant epoxy resins may be used to make electrical laminates. This invention is particularly useful in end use applications in which a low bromine or low halogen content is required or desired.
    Type: Grant
    Filed: January 20, 2012
    Date of Patent: May 14, 2013
    Assignee: Dow Global Technologies LLC
    Inventor: Joseph Gan
  • Patent number: 8362188
    Abstract: The present invention provides a flame-retardant hardener for epoxy resin having a compound represented by formula (I): In addition, the present invention also provides a flame-retardant resin material comprising the aforementioned flame-retardant hardener for epoxy resin. Moreover, the present invention further provides a method for manufacturing a flame-retardant hardener for epoxy resin, which can be directly applied in a resin curing process after a cooling step without additional purification. As described by the present invention, the flame-retardant hardener for epoxy resin in accordance with the present invention can replace the conventional toxic halogenated resins, and provide an environmental-friendly flame-retardant hardener for epoxy resin.
    Type: Grant
    Filed: June 20, 2012
    Date of Patent: January 29, 2013
    Inventor: Chien-Hong Chen
  • Publication number: 20130018128
    Abstract: This invention relates to a process for producing compounds derived from 9,10-Dihydro-9-Oxa-10-Phosphaphenantrene-10-oxide (DOPO). In particular, the invention relates to producing DOPO-derived compounds by reacting DOPO with diol compounds in the presence of a catalyst. This invention also relates to DOPO derived composition containing a high melting point diastereomer. The DOPO derived compounds may be useful as flame-retardants.
    Type: Application
    Filed: March 28, 2011
    Publication date: January 17, 2013
    Applicant: ALBEMARLE CORPORATION
    Inventors: Qiang Yao, Junzuo Wang, Arthur G. Mack
  • Publication number: 20130012668
    Abstract: The present invention provides novel phosphinated compounds of monofunctional, bifunctional, multifunctional phenols represented by the following formulae and their derivatives, and preparation methods thereof:
    Type: Application
    Filed: July 5, 2012
    Publication date: January 10, 2013
    Applicant: NATIONAL CHUNG HSING UNIVERSITY
    Inventors: CHING-HSUAN LIN, YU-WEI TIAN
  • Publication number: 20120289663
    Abstract: A thermosetting monomer comprising at least two of an aryl-cyanato group and at least two of a phosphorus group.
    Type: Application
    Filed: December 22, 2010
    Publication date: November 15, 2012
    Inventors: Michael J. Mullins, Robert E. Hefner, JR., Mark B. Wilson
  • Publication number: 20120276417
    Abstract: A lubricant for a magnetic disk that is excellent in heat resistance and is suitably used in a magnetic disk to be mounted on a magnetic recording device of a thermally assisted magnetic recording system and a magnetic disk provided with a lubricant layer containing this lubricant. The lubricant for a magnetic disk contains a compound where perfluoropolyether groups each having a perfluoropolyether main chain in its structure and a phosphazene ring at an end are linked to each other through a linking group. The linking group is an aliphatic group or a phosphazene ring. In a magnetic disk having at least a magnetic recording layer, a protective layer, and a lubricant layer on a substrate, the lubricant layer contains the lubricant for a magnetic disk.
    Type: Application
    Filed: June 22, 2010
    Publication date: November 1, 2012
    Applicant: WD MEDIA (SINGAPORE) PTE. LTD.
    Inventors: Koichi Shimokawa, Katsushi Hamakubo
  • Publication number: 20120149932
    Abstract: Phosphorus-containing compounds useful for flame retardant epoxy resins are disclosed. The flame retardant epoxy resins may be used to make electrical laminates. This invention is particularly useful in end use applications in which a low bromine or low halogen content is required or desired.
    Type: Application
    Filed: February 15, 2012
    Publication date: June 14, 2012
    Applicant: Dow Global Technologies LLC
    Inventor: Joesph Gan
  • Publication number: 20120053265
    Abstract: The present invention relates to novel, halogen-free flame retardant derived from 9,10-Dihydro-9-Oxa-10-Phosphaphenantrene-10-oxide (DOPO). This invention also relates to the use of the halogen free DOPO derived flame retardant in polymers.
    Type: Application
    Filed: May 19, 2010
    Publication date: March 1, 2012
    Applicant: ALBEMARLE CORPORATION
    Inventors: Yu Li Angell, Kimberly M. White, Scott E. Angell, Arthur G. Mack
  • Patent number: 8124716
    Abstract: Phosphorus-containing compounds are disclosed which are obtainable by reacting: (A) at least one organophosphorus compound having a group selected from the group H—P?O; the group P—H and the group P—OH; and (B) at least one compound having the following Formula (I): [R?(Y)m?]m(X—O—R?)n??Formula (I) wherein R? is an organic group; Y is a functional group selected from the group consisting of hydroxy, carboxylic acid, and amine; X is a hydrocarbylene group; R? is hydrogen or a hydrocarbyl group having from 1 to 8 carbon atoms, R is alkyl or aryl group having from 1 to 12 carbon atoms; m?, m and n are, independently, numbers equal to or greater than 1. These compounds are useful for making flame retardant epoxy and polyurethane resins and ignition resistant thermoplastic resins, each of which is useful for a variety of end uses requiring flame retardancy or ignition resistance. Flame retardant epoxy resins may be used to make electrical laminates.
    Type: Grant
    Filed: November 4, 2010
    Date of Patent: February 28, 2012
    Assignee: Dow Global Technologies LLC
    Inventor: Joseph Gan
  • Patent number: 8058329
    Abstract: Nitrous bridged derivatives of 6H-dibenz[c,e][1,2]-oxaphosphorine-6-oxides, process for the preparation and use thereof. The invention refers to nitrous bridged derivatives of 6H-dibenz[c,e][1,2]-oxaphosphorine-6-oxides, a process for the preparation thereof and their use as flameproofing agents for polymers such as polyesters, polyamides, polycarbonates, polystyrenes, polyethylene, polypropylene, phenolic and epoxy resins.
    Type: Grant
    Filed: November 3, 2005
    Date of Patent: November 15, 2011
    Assignee: Schill+Seilacher “Struktol” Aktiengesellschaft
    Inventors: Berthold Just, Uwe Dittrich, Holger Keller, Manfred Doering, Uwe Storzer, Michael Ciesielski
  • Publication number: 20110257347
    Abstract: Phosphorus-containing benzoxazine-based bisphenols and derivatives thereof are disclosed. The phosphorus-containing benzoxazine-based bisphenols are prepared by reacting DOPO with benzoxazine to form the phosphorus-containing benzoxazine-based bisphenols. The phosphorus-containing benzoxazine-based bisphenols can further to form advanced epoxy resins. The advanced epoxy resins can further be cured to form flame retardant epoxy thermosets.
    Type: Application
    Filed: December 28, 2010
    Publication date: October 20, 2011
    Applicant: NATIONAL CHUNGHSING UNIVERSITY
    Inventors: Ching-Hsuan LIN, Hung-Tse LIN, Sheng Lung CHANG, Yu-Ming HU
  • Publication number: 20080287701
    Abstract: A bisbiphenylacylphosphine oxide of formula (I) and its preparation method are provided. The formula of —Ar— is First, 10-chloro-9,10-dihydro-9-oxa-10-phosphaphenanthrene (CDOP) is prepared by using 2-phenylphenol, and then is esterified to synthesize 6-methoxy-(6H)-dibenz[c,e][1,2]oxa-phosphorin (MDOP). Next, acid chloride compounds are added for performing the Arbuzov reaction to synthesize bisbiphenylacylphosphine oxide. CDOP is hydrolyzed to be derived into 9,10-dihydro-9-oxa-10-phosphaphen-anthrene-10-oxide (DOPO), and then DOPO reacts with arylaldehyde to form secondary alcohol. Therefore, bisbiphenylacylphosphine oxide is prepared by using secondary alcohol under oxidation. Also, under a coupling reaction, DOPO reacts with the acid chloride compounds by using a Lewis acid as a catalyst to prepare bisbiphenylacylphosphine oxide.
    Type: Application
    Filed: June 18, 2008
    Publication date: November 20, 2008
    Applicant: CHUNG SHAN INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Wen-Chiung Su, Chang-Chih Lin, Ching-Shang Sheng
  • Patent number: 7217828
    Abstract: Phosphinines of formula (I) can be combined with metal salts to prepare hydroformylation catalysts. The phosphinine complexes have two phosphorus centers that may be substituted with a variety of hetero atoms or alkyl substituents to modify the ligand characteristics of the phosphinine. Phosphinine metal complexes are employed under normal hydroformylation reaction conditions. The preparatory routes to the phosphinine ligands of formula (I) allow for their convenient synthesis.
    Type: Grant
    Filed: August 5, 2004
    Date of Patent: May 15, 2007
    Assignee: OXENO Olefinchemie GmbH
    Inventors: Detlef Selent, Armin Boerner, Renat Kadyrov, Cornelia Borgmann, Dieter Hess, Klaus-Diether Wiese, Dirk Roettger
  • Patent number: 6946569
    Abstract: Chiral phosphine ligands derived from chiral natural products including D-mannitol and tartaric acid. The ligands contain one or more 5-membered phospholane rings with multiple chiral centers, and provide high stereoselectivity in asymmetric reactions.
    Type: Grant
    Filed: March 2, 2004
    Date of Patent: September 20, 2005
    Assignee: The Penn State Research Foundation
    Inventor: Xumu Zhang
  • Patent number: 6797821
    Abstract: The present invention discloses an active-hydrogen-containing phosphorus compound for cross-linking a resin and for imparting flame-retardancy to the cured resin, and in particular to a cured frame-retardant epoxy resin prepared by reacting the hardener with a di- or poly-functional epoxy resin via an addition reaction between the active hydrogen and the epoxide group. The present invention also discloses an epoxy resin made from the active-hydrogen-containing phosphorus compound and epihalohydrin.
    Type: Grant
    Filed: January 30, 2002
    Date of Patent: September 28, 2004
    Inventors: Chun-Shan Wang, Jeng-Yueh Shieh, Ching Hsuan Lin
  • Patent number: 6727377
    Abstract: Chiral phosphine ligands derived from chiral natural products including D-mannitol and tartaric acid. The ligands contain one or more 5-membered phospholane rings with multiple chiral centers, and provide high stereoselectivity in asymmetric reactions.
    Type: Grant
    Filed: November 6, 2001
    Date of Patent: April 27, 2004
    Assignee: The Penn State Research Foundation
    Inventor: Xumu Zhang
  • Publication number: 20030212288
    Abstract: Disclosed herein are processes for hydrocyanation and isomerization of olefins by using at least one multidentate phosphonite ligands, including organometallic phosphonite ligands with a Group VIII metal or Group VIII metal compound, and optionally, a Lewis acid promoter.
    Type: Application
    Filed: June 4, 2003
    Publication date: November 13, 2003
    Inventors: Christian P. Lenges, Helen S. M. Lu, Joachim C. Ritter
  • Patent number: 6613848
    Abstract: A hardener for an epoxy resin comprises a phenolic, thiophenolic, aminophenyl, tris-phenolic, tris-thiophenolic, tris-aminophenyl, tetrakis-phenolic, tetrakis-thiophenolic, or tetrakis-aminophenyl compounds; or phenol-formaldehyde or phenol-formaldehyde/melamine-formaldehyde resins wherein the phenyl rings are substituted with at least one of the structures wherein R1 and R2 independently are H, C1-C18 alkyl, C6-C18 aryl, C6-C18 substituted aryl, C6-C18 aryl methylene, or C6-C18 substituted aryl methylene; X is O, S or NH and Ar is wherein R is C1-C4 alkyl and n=0-5.
    Type: Grant
    Filed: May 16, 2000
    Date of Patent: September 2, 2003
    Assignee: National Science Council
    Inventors: Chun-Shan Wang, Jeng-Yueh Shieh
  • Patent number: 6441067
    Abstract: A series of novel phosphorus-containing compounds suitable for use as a flame retardant having the following formula are disclosed: wherein R1-R8 independently are H or C1-C4 alkyl; Y is —OH or wherein Q is H, —NO2, —NH2, —OH, —CH3, —CHO, —COOH, A is —O—, —, —CH2—, or —C(CH3)2—; R9 and R10 independently are H, or C1-C4 alkyl.
    Type: Grant
    Filed: August 23, 2001
    Date of Patent: August 27, 2002
    Assignee: Chung-Shan Institute of Science & Technology
    Inventors: Yie-Shun Chiu, Meng-Dan Jiang, Ying-Ling Liu
  • Patent number: 5932642
    Abstract: A description is given of novel compounds of formula I ##STR1## wherein R.sup.1, R.sub.2, R.sub.3, and R.sup.4 are hydrogen, alkyl, phenylalkyl, or alkoxy and where R.sub.5 and R.sub.6 are hydrogen or phenyl or together with the linking carbon atoms, are cycloalkenylene or cycloalkenylene which is interrupted by oxygen or sulfur. These compounds are useful as stabilizers for organic materials against oxidative, thermal or light-induced degradation.
    Type: Grant
    Filed: December 19, 1997
    Date of Patent: August 3, 1999
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Peter Nesvadba, Paul Dubs
  • Patent number: 5914361
    Abstract: Phosphonites which are useful as a deterioration inhibitor for organic material and are represented by the following formula: ##STR1## wherein X represents a connecting group, and R.sup.A represents a phenyl group which may be optionally substituted; and a process for producing the same are provided.
    Type: Grant
    Filed: August 26, 1997
    Date of Patent: June 22, 1999
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Naoki Inui, Taketoshi Kikuchi, Kanako Fukuda
  • Patent number: 5705668
    Abstract: New phosphazene derivatives, fully substituted by aromatic groups and perfluoropolyethereal chains, are utilized as stabilizers for oils and greases based on perfluoropolyethers. Such derivatives inhibit the degradation process affecting the perfluoropolyethereal chains when these are subjected to high temperatures in an oxidizing atmosphere and in the presence of metals, such as for example aluminium, titanium, vanadium and their alloys, or steels.
    Type: Grant
    Filed: October 30, 1996
    Date of Patent: January 6, 1998
    Assignee: Ausimont S.p.A.
    Inventors: Paolo Odello, Walter Navarrini, Richard Dickinson Chambers, Costante Corti
  • Patent number: 5202297
    Abstract: Rhodium hydroformylation catalysts containing bisphosphite ligands of the formula I ##STR1## where --X-- is a divalent bisarylene radical or R.sup.1,W is a divalent arylene, bisarylene or alkylene radical, andR.sup.1 and R.sup.2 are identical or different and are substituted or unsubstituted alkylene or ortho-arylene.
    Type: Grant
    Filed: August 20, 1991
    Date of Patent: April 13, 1993
    Assignee: BASF Aktiengesellschaft
    Inventors: Peter M. Lorz, Werner Bertleff, Michael Roeper, Dieter Koeffer
  • Patent number: 5075481
    Abstract: Compounds of formula I ##STR1## wherein n is 2-4, R.sub.1 is alkyl, cycloalkyl, phenylalkyl, phenyl or a radical of formula II ##STR2## R.sub.2, R.sub.3 and R.sub.4 are independently hydrogen, alkyl, cycloalkyl, phenylalkyl or aryl, or R.sub.3 and R.sub.4 together are alkylene, R.sub.5 and R.sub.6 are independently hydrogen, alkyl, cycloalkyl or phenylalkyl, R.sub.7 is hydrogen, alkyl or a group of the formula --(CH.sub.2).sub.k COOR.sub.8, where k is 0-2 and R.sub.8 is hydrogen or alkyl, and T is an n-valent hydrocarbon radical which may be interrupted by heteroatoms, are useful stabilizers for substrates subject to the deleterious effects of oxygen, heat and/or actinic radiation.
    Type: Grant
    Filed: August 23, 1990
    Date of Patent: December 24, 1991
    Assignee: Ciba-Geigy Corporation
    Inventors: Peter Hofmann, Paul A. Odorisio, Glen T. Cunkle, Don Sabrsula
  • Patent number: 4831178
    Abstract: 1,3,2-oxazaphospholidine aliphatic ester derivatives of the formula ##STR1## are effective in stabilizing organic materials against oxidative, thermal and actinic degradation, said derivatives being particularly effective as color improvers and process stabilizers in organic materials containing phenolic antioxidants.
    Type: Grant
    Filed: October 19, 1987
    Date of Patent: May 16, 1989
    Assignee: Ciba-Geigy Corporation
    Inventors: Paul A. Odorisio, Stephen D. Pastor, James L. Hyun
  • Patent number: 4751319
    Abstract: 1,3,2-oxazaphospholidine derivatives of the formula ##STR1## are effective in stabilizing organic materials against oxidative, thermal and actinic degradation, said derivatives being particularly effective as color improvers and process stabilizers in organic materials containing phenolic antioxidants.
    Type: Grant
    Filed: February 2, 1987
    Date of Patent: June 14, 1988
    Assignee: Ciba-Geigy Corporation
    Inventors: Paul A. Odorisio, Stephen D. Pastor, James L. Hyun
  • Patent number: 4732997
    Abstract: Photographic material containing magenta coupler is stabilized by incorporating a dibenzoxaphosphorin of the formula ##STR1## into the emulsion layer containing the coupler or into an adjoining colloid layer. The yellowing on dark storage of such material is substantially reduced as a result.The symbols A and n are defined in claim 1.
    Type: Grant
    Filed: November 18, 1986
    Date of Patent: March 22, 1988
    Assignee: Ciba-Geigy AG
    Inventors: Paul Tschopp, David G. Leppard
  • Patent number: 4694094
    Abstract: New organic compounds containing a phosphorus heterocycle of the phosphonite type, in which the phosphorus atom is connected on the one hand to an oxygen atom and on the other hand to an oxygen, sulphur or nitrogen atom, characterized by comprising two of such heterocycles, the two phosphorus atoms being connected by a hydrocarbon group. Preparation of these diphosphonites by the action of a tetrahalogeno- or tetraminodiphosphine upon a diol or an alcohol carrying a phenol, thiol, enol, acid or amine function.
    Type: Grant
    Filed: May 21, 1985
    Date of Patent: September 15, 1987
    Assignee: Societe Nationale Elf Aquitaine
    Inventors: Sylvain Juge, Yvonne Legras