Spiro Ring Patents (Class 524/120)
  • Patent number: 6689827
    Abstract: The invention relates to transparent, impact-resistant thermoplastic molding materials containing A) a matrix consisting of at least two different mixture components, B) an impact-resistance modifier, C) an additive, essentially consisting of c1) at least one 2,6-disubstituted phenol, and c21) at least one organic phosphite of general formula (I) P(OR1)n(OAr)3−n, c22 at least one organic phosphite of general formula (IIa) and/or (IIb), or c23) a mixture of compounds in accordance with c21) and c22).
    Type: Grant
    Filed: September 14, 1999
    Date of Patent: February 10, 2004
    Assignee: BASF Aktiengesellschaft
    Inventors: Christian Schade, Rainer Neumann, Claudia Messinger, Klaus Benker, Armin Kurps
  • Patent number: 6680351
    Abstract: A polyolefin composition having high resistance to degradation, said composition formed by combining components comprising at least one polyolefin component produced from a transition metal halide catalyst, bis(2,4-dicumylphenyl)pentaerythritol diphosphite, triisopropanolamine, a hydrotalcite component, and at least one phenol component.
    Type: Grant
    Filed: July 20, 1999
    Date of Patent: January 20, 2004
    Assignee: Phillips Petroleum Company
    Inventors: Mark K. Russell, David R. Battiste
  • Patent number: 6677451
    Abstract: A new process is described for the preparation of a compound of the formula I wherein R1, R2, R3 and R4, independently of each other, are C1-C8alkyl or C1-C5hydroxyalkyl, or R1 and R2 together with the carbon atom they are attached to are C5-C12cycloalkyl, or R3 and R4 together with the carbon atom they are attached to are C5-C12cycloalkyl; R5, R6, R7, R8 and R9, independently of each other, are H, C1-C8alkyl, C2-C8alkenyl, C5-C12aryl, C1-C4haloalkyl, an electron withdrawing group, or C6-C12aryl which is substituted by a residue selected from C1-C4alkyl, C1-C4alkoxy, halogen; and R7 and R8 together may also form a chemical bond; and R is an organic linking group containing 2-500 carbon atoms and forming, together with the carbon atoms it is directly connected to and the nitrogen atom, a substituted, 5-, 6 or 7-membered cyclic ring structure; characterized in that a compound of the formula II is oxidized.
    Type: Grant
    Filed: November 20, 2001
    Date of Patent: January 13, 2004
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Alessandro Zedda, Gianluca Ferri, Massimiliano Sala
  • Patent number: 6660786
    Abstract: The present invention relates to a flame retarded epoxy resin composition, which is characterized by that said flame retarded epoxy resin composition comprising: (A) at least one type of epoxy resin; (B) a phosphorus-and-nitrogen-containing heterocyclic compound, said compound having a moiety which can react with the epoxy group of the epoxy resin, usedful as a hardening agent, and having a structure as shown by formula (I):  wherein m is an integer of from 0 to 2, n is an integer of from 3 to 7, but at least one m is not 2. The epoxy resin composition consisting of the above components (A) and (B) has improved flame retarded property and thus is suitably used as the flame retarded material required for the parts of composite material, laminated plates, printed circuit boards, electronic products, electrical products, and the like.
    Type: Grant
    Filed: March 19, 2001
    Date of Patent: December 9, 2003
    Assignee: Chang Chun Plastics, Co., Ltd.
    Inventors: Kuen-Yuan Hwang, Hong-Hsing Chen, Tsung-Yu Chen, Ching Fu Kao
  • Patent number: 6642288
    Abstract: The invention relates to a flame-retardant polyester or polyamide composition that contains a combination of a compound derived from triazine and an organic phosphorus compound. By choosing as the triazine compound a melamine condensation product, for example melam, a UL 94 V-0 and GWFI 960° classification can be obtained for glass-fibre reinforced polyester or polyamide with a relatively low concentration of flame-retardant additives, and without good mechanical properties being affected. Unusual is moreover that the CTI value can again be brought to 600 Volt for this glass-fibre reinforced polyester or polyamide. In a preferred embodiment use is made of a phosphorus-containing compound containing more than 14 wt. % P. The use thereof with for example melamine cyanurate results in optimum flame-retardant behaviour at a low total concentration of flame-retardant additives. Important additional aspects are improved crystallisation behaviour and a high stiffness.
    Type: Grant
    Filed: January 10, 2000
    Date of Patent: November 4, 2003
    Assignee: DSM N.V.
    Inventor: Richerdes J. M. Hulskotte
  • Patent number: 6638997
    Abstract: Hindered amines substituted on the N-atom with an —O—E—OH moiety are particularly effective in stabilizing polyolefin and automotive coating compositions against the deleterious effects of oxidative, thermal and actinic radiation where the presence of the OH group on the compounds adds important properties not attainable by the use of normal —O—E moieties.
    Type: Grant
    Filed: September 27, 2001
    Date of Patent: October 28, 2003
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: James P. Galbo, Gerald A. Capocci, Nancy N. Cliff, Robert E. Detlefsen, Michael P. DiFazio, Ramanathan Ravichandran, Peter Solera
  • Publication number: 20030125431
    Abstract: Crystalline polyglycolic acid wherein a difference between the melting point Tm and the crystallization temperature Tc2 is not lower than 35° C., and a difference between the crystallization temperature Tc1 and the glass transition temperature Tg is not lower than 40° C. A production process of polyglycolic acid modified in crystallinity, comprising applying heat history to crystalline polyglycolic acid at a temperature of not lower than (the melting point Tm of the crystalline polyglycolic acid+38° C.). A polyglycolic acid composition comprising crystalline polyglycolic acid and a heat stabilizer, wherein a difference (T2−T1) between the temperature T2 at 3%-weight loss on heating of the polyglycolic acid composition and the temperature T1 at 3%-weight loss on heating of the crystalline polyglycolic acid is not lower than 5° C.
    Type: Application
    Filed: April 25, 2002
    Publication date: July 3, 2003
    Inventors: Kazuyuki Yamane, Hiromitsu Miura, Toshihiko Ono, Junji Nakajima, Daisuke Itoh
  • Patent number: 6541549
    Abstract: A non-xenoestrogenic phosphorus-containing stabilizer for organic materials is disclosed wherein the stabilizer is selected from the group consisting of phosphorus-containing compounds of the structures wherein y in an integer of from 6 to 20, and where Z is a linking group, m is 0 or 1, n is an integer of at least 2, the asterisks are independently selected terminal groups, R1, R2, R3, R4, R5, R6, R7, and R8 are independently selected from the group consisting of hydrogen, alkyl groups, aralkyl groups, or halogen groups and Q is selected from the group consisting of where R11 is alkyl or aralkyl, and
    Type: Grant
    Filed: November 1, 1999
    Date of Patent: April 1, 2003
    Assignee: Crompton Corporation
    Inventors: Scott R. Archibald, Tracy L. Coffin-Werner
  • Patent number: 6521681
    Abstract: Organic materials which possess outstanding stability to oxidative, thermal or light-induced degradation comprise as stabilizers at least one compound of the benzofuran-2-one type and at least one compound of the sterically hindered amine type.
    Type: Grant
    Filed: June 23, 1997
    Date of Patent: February 18, 2003
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Jürg Zingg, Jean-Roch Pauquet, Christoph Kröhnke
  • Publication number: 20030013788
    Abstract: A molding composition containing melt polycarbonate conforming to a specific formula is disclosed. The composition that additionally contains a phosphorous compound is characterized in its improved resistance to hydrolysis.
    Type: Application
    Filed: March 22, 2002
    Publication date: January 16, 2003
    Inventors: James Mason, Wolfgang Ebert
  • Patent number: 6486238
    Abstract: A hindered amine compound having thesolubility in an acidic solution of 5.0×10−3 eq./liter or less comprising at least two specific organic groups in a specific weight ratio in a molecule, or at least two specific monomeric units, which can be used as a stabilizer of a resin.
    Type: Grant
    Filed: December 20, 1999
    Date of Patent: November 26, 2002
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Kota Kitamura, Chihiro Oshimo, Genei Matsukawa, Futoshi Ishimaru
  • Patent number: 6485657
    Abstract: A new gamma-ray stabilizer comprising a combination of 100 parts by weight of a benzyl compound (A) having a specific chemical structure and 0.01 to 10 parts by weight of a pentaerythritol phosphorous ester (B) having a spirocyclic structure. Said stabilizer is preferably blended in such a manner that said (A) is contained in an amount of 0.01 to 10 parts by weight based on 100 parts by weight of a thermoplastic polymer (polycarbonate or the like), and said (B) is contained in an amount of 0.01 to 1 part by weight based on 100 parts by weight of said (A).
    Type: Grant
    Filed: February 11, 2000
    Date of Patent: November 26, 2002
    Assignee: Teijin, Limited
    Inventors: Wataru Funakoshi, Tetsuo Kanda, Fumitaka Kondo, Katsushi Sasaki
  • Patent number: 6486243
    Abstract: A light-colored thermoplastic molding composition comprising a polyurethane elastomer is disclosed. The polyurethane which is the reaction product of at least one polyol, at least one organic diisocyanate and at least one polyol chain extender contains one or more pentaerythritol diphosphites color stabilizers conforming to a specific formula exhibits improved color stability and improved processability. The process for preparation entails introducing the stabilizer before the reaction has been completed.
    Type: Grant
    Filed: October 1, 2001
    Date of Patent: November 26, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Wolfgang Bräuer, Wolfgang Kaufhold, Hans-Georg Hoppe, Hans-Georg Wussow
  • Patent number: 6465548
    Abstract: The present invention relates to a stabilizer composition for organic polymer material containing (a) 6-hydroxychroman compound, a phosphorus antioxidant and (c) phenolic antioxidant, wherein the component (a) is contained in a proportion of 0.5 wt %-10 wt % and the total amount of the component (b) and the component (c) is in a proportion of 99.5 wt %-90 wt %, of the total amount of the components (a), (b) and (c). The present invention also relates to an organic polymer material composition containing an organic polymer and the above-mentioned stabilizer composition for organic polymer material. The use of the stabilizer composition of the present invention as a stabilizer for organic polymer materials affords an industrially extremely useful stabilized organic polymer material composition superior in heat stability during processing.
    Type: Grant
    Filed: April 14, 2000
    Date of Patent: October 15, 2002
    Assignee: Yoshitomi Fine Chemicals, Ltd.
    Inventors: Takeshi Inoue, Shoichi Horie
  • Patent number: 6451888
    Abstract: A phosphite stabilizer composition is provided which exhibits enhanced hydrolytic stability. The stabilizer composition preferably contains from 10 to 90 percent by weight of a phosphorous compound selected from phosphites and phosphonites, and preferably contains from 10 to 90 percent by weight of a hindered phenolic isocyanate. The stabilizer composition exhibits enhanced hydrolytic stability, and is preferably in the form of powders or flakes. The stabilizer composition is useful as an additive to polymeric resins as an antioxidant stabilizer.
    Type: Grant
    Filed: June 1, 1994
    Date of Patent: September 17, 2002
    Assignee: General Electric Company
    Inventor: James A. Mahood
  • Patent number: 6420461
    Abstract: The present invention relates to novel compounds of the formula (III) in which the substituents are as defined in the description, to a process for their preparation and to mixtures with other compounds. The compounds of the formula (III) are suitable for stabilizing organic material against the effect of light and heat.
    Type: Grant
    Filed: November 12, 1999
    Date of Patent: July 16, 2002
    Assignee: Clariant GmbH
    Inventors: Thomas Stährfeldt, Mathias Mehrer, Matthias Zäh, Gerhard Pfahler
  • Patent number: 6342549
    Abstract: Cycloolefin resin pellets of the present invention comprises a cycloolefin resin pellet and a powdery coating material and/or a liquid coating material, the melting point or the glass transition point of the coating material being 200° C. or lower, and the coating material being adhered onto the surface of the cycloolefin resin pellets, so that the molded product thereof is excellent in transparency.
    Type: Grant
    Filed: January 5, 1996
    Date of Patent: January 29, 2002
    Assignees: Mitsui Chemicals, Inc., Ticona GmbH
    Inventors: Toshiyuki Hirose, Yohzoh Yamamoto, Toshio Kimura, Shinji Osato
  • Publication number: 20020002222
    Abstract: An organic phosphorus-containing antioxidant which is stablized against hydrolysis includes (a) 20 to 99.9 wt % of organic phosphite or phosphonite; and (b) 0.1 to 80 wt % of acid-binding metal salt treated with a surface conditioning agent, wherein the weight ratio of the surface conditioning agent to the acid-binding metal salt is 0.1 to 50 wt %:99.9 to 50 wt %, and the surface conditioning agent is selected from the group consisting of silanes, titanates, zirconates, aluminates, zirco-alumiates, non-ionic surfactants, and anionic surfactants.
    Type: Application
    Filed: July 28, 1999
    Publication date: January 3, 2002
    Inventors: CHING-FAN CHIU, KUN-CHANG LEE, WEN-YI SU, DONG-BI SHIUEH
  • Publication number: 20010053805
    Abstract: A non-xenoestrogenic phosphorus-containing stabilizer for organic materials is disclosed wherein the stabilizer is selected from the group consisting of phosphorus-containing compounds of the structures 1
    Type: Application
    Filed: November 1, 1999
    Publication date: December 20, 2001
    Inventors: SCOTT R. SRCHIBALD, TRACY L. COFFIN-WERNER
  • Patent number: 6319965
    Abstract: A marginal treatment material of a denture base, comprising (A) 100 parts by weight of an organopolysiloxane having at least two aliphatic unsaturated hydrocarbons in one molecule and having a viscosity of 500˜5,000 cs at 25° C.; (B) 0.5˜30 parts by weight of an organohydrogen polysiloxane having at least three hydrogen atoms directly bonded to a silicon atom in one molecule; (C) 10˜500 ppm, based on the total of the components (A) and (B), of a silicone-soluble platinum compound; and (D) 0.5˜20 parts by weight of fine silica powder having a BET specific surface area of 50˜500 m2/g, whose surface is made hydrophobic.
    Type: Grant
    Filed: August 24, 1999
    Date of Patent: November 20, 2001
    Assignee: GC Corporation
    Inventors: Hiroshi Kamohara, Makiko Takeo
  • Patent number: 6277905
    Abstract: This invention relates to a process for improving the toughness of a polymer composition comprising blending: (A) a polyester comprising: (1) terephthalic acid in the amount of 85 to 100 mole % based on the mole percentages of the dicarboxylic acid component equaling a total of 100 mole %. (2) a glycol component comprising from about 60 to 100 mole % 1,4-cyclohexanedimethanol based on the total percentages of the glycol component equaling a total of 100 mole %; (B) one or more rubber impact modifiers; (C) one or more halogenated organic compounds containing at least one imide group having a melting point of greater than 240° C.; and (D) reinforcing fiber.
    Type: Grant
    Filed: November 30, 1999
    Date of Patent: August 21, 2001
    Assignee: Eastman Chemical Company
    Inventor: Gerald Timothy Keep
  • Publication number: 20010014708
    Abstract: A method of producing a thermotropic liquid crystalline copolyester having an extremely small amount of out-gases comprising the steps of: (1) charging in a reactor 5-100 mol % of aromatic hydroxycarboxylic acid, 0-47.5 mol % of aromatic dicarboxylic acid and 0-47.5 mol % of aromatic diol, so that the sum of mol % of each material is 100 mol % and the mol % of aromatic dicarboxylic acid and that of aromatic diol are substantially equal; (2) adding acetic anhydride of an amount which satisfies the formula, (B−C)/A≧1.04, “A” representing the total molar number of the hydroxy group in a reaction system, “B” representing the molar number of acetic anhydride to be added, and “C” representing the molar number of water present in the reaction system prior to addition of acetic anhydride; (3) acetylation; (4) melt polymerization; and (5) solid-phase polymerization.
    Type: Application
    Filed: March 15, 2001
    Publication date: August 16, 2001
    Applicant: NIPPON PETROCHEMICAL CO., LTD.
    Inventors: Satoshi Murouchi, Yoshikuni Yamada, Toshitaka Kobayashi
  • Patent number: 6265474
    Abstract: An NBR composition comprising: an NBR; (A) a carbocyclic phosphite compound represented by the following general formula, wherein R is an alkyl group having a carbon number of integer of 8 to 24, or a mono-, di- or tri- submitted phenyl group by alkyl group having a carbon number of integer of 1 to 10; (B) an acid phosphoric ester compound represented by the following general formula and having an acid value of about 150 to 800 KOHmg/g. wherein R′ is hydrogen or an alkyl group having a carbon number of integer of 1 to 13, and R″ is an alkyl group having a carbon number of integer of 1 to 13; (C) an ethylene-&agr;-olefin type copolymer rubber having a number average molecular weight (Mn) of 104 to 106; and (D) a liquid NBR.
    Type: Grant
    Filed: March 23, 1999
    Date of Patent: July 24, 2001
    Assignee: Freudenberg-NOK General Partnership
    Inventors: Kenichi Fujimoto, Takeshi Sato
  • Patent number: 6214909
    Abstract: A resin composition comprising polystyrene having the syndiotactic configuration (SPS) showing improved heat stability in heat molding at a high temperature is obtained by adding a combination of a phenolic antioxidant and an antioxidant containing phosphorus to SPS. The molded article is obtained by using the resin composition as the material. Additional use of an antioxidant containing sulfur gives more excellent improvement. The composition may further contain another thermoplastic resin and/or rubber elastomer, a polymer exhibiting compatibility with or affinity for SPS and having a polar group, and/or an inorganic filler in accordance with necessity.
    Type: Grant
    Filed: November 10, 1997
    Date of Patent: April 10, 2001
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventor: Akitoshi Masuyama
  • Patent number: 6177492
    Abstract: The present invention relates to a thermoplastic resin composition comprising: (A) 95 to 5 parts by weight of an aromatic polycarbonate, (B) 5 to 95 parts by weight of a styrene-based resin, and (C) a melt kneaded resin composition comprising a polyphenylene ether and a saturated polyester, the amount of component (C) being 1 to 50 parts by weight based on 100 parts by total weight of the components (A) and (B).
    Type: Grant
    Filed: March 3, 1999
    Date of Patent: January 23, 2001
    Assignee: Mitsubishi Engineering-Plastics Corporation
    Inventors: Kiyoji Takagi, Koji Nishida, Tatuya Masuki, Shinya Miya, Kenichi Narita
  • Patent number: 6162847
    Abstract: A method for preparing a rubber seal product of a type which contacts a metal surface for sealing thereof, comprising the steps of: preparing a rubber composition comprising acrylonitrile butadiene rubber (NBR), (A) a carbocyclic phosphite compound represented by the general formula ##STR1## where R is an alkyl group having 8 to 24 carbon atoms, or a phenyl group having a mono-, di- or tri-substituted alkyl group having 1 to 10 carbon atoms, and (B) an acid phosphate compound represented by the general formula ##STR2## where R' is a hydrogen atom, or an alkyl group having 1 to 13 carbon atoms, and R" is an alkyl group having 1 to 13 carbon atoms, the phosphate compound having an acid number of about 150 to 800 KOH mg/g; wherein a total of about 5 to 20 parts by weight of compound (A) and compound (B) are present in the composition based on 100 parts by weight of NBR, vulcanizing the rubber composition to obtain a vulcanized rubber composition; and compressing the vulcanized rubber composition toward a metal s
    Type: Grant
    Filed: December 8, 1997
    Date of Patent: December 19, 2000
    Assignee: Freudenberg-NOK General Partnership
    Inventors: Kenichi Fujimoto, Kenji Mikuni
  • Patent number: 6143813
    Abstract: Propylene resin composition containing propylene-.alpha.-olefin random copolymer, nucleating agent and spherical magnesium silicate particles. Stretched films.
    Type: Grant
    Filed: March 24, 1999
    Date of Patent: November 7, 2000
    Assignee: Japan Polychem Corporation
    Inventors: Tadashi Sezume, Yasunori Nakamura
  • Patent number: 6117995
    Abstract: A new process is described for the preparation of a compound of the formula I ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4, independently of each other, are C.sub.1 -C.sub.8 alkyl or C.sub.1 -C.sub.5 hydroxyalkyl, or R.sub.1 and R.sub.2 together with the carbon atom they are attached to are C.sub.5 -C.sub.2 cycloalkyl, or R.sub.3 and R.sub.4 together with the carbon atom they are attached to are C.sub.5 -C.sub.12 cycloalkyl; R.sub.5, R.sub.6, R.sub.7, R.sub.8 and R.sub.9, independently of each other, are H, C.sub.1 -C.sub.8 alkyl, C.sub.2 -C.sub.8 alkenyl, C.sub.5 -C.sub.12 aryl, C.sub.1 -C.sub.4 haloalkyl, an electron withdrawing group, or C.sub.6 -C.sub.12 aryl which is substituted by a residue selected from C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, halogen; and R.sub.7 and R.sub.
    Type: Grant
    Filed: February 19, 1999
    Date of Patent: September 12, 2000
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Alessandro Zedda, Gianluca Ferri, Massimiliano Sala
  • Patent number: 6063844
    Abstract: A thermoplastic resin composition that contains a branched polycarbonate resin, a rubber modified graft copolymer that contains a discontinuous elastomeric phase dispersed in a continuous rigid thermoplastic phase, wherein at least a portion of the rigid thermoplastic phase is chemically grafted to the elastomeric phase, a sterically hindered phenol stabilizer compound, a thioester stabilizer compound and a phosphite stabilizer compound, exhibits improved stability.
    Type: Grant
    Filed: April 2, 1998
    Date of Patent: May 16, 2000
    Assignee: General Electric Company
    Inventors: James Barren, Jianing Huang
  • Patent number: 6033600
    Abstract: A stabilizer blend composition, a method for providing compacted particles, and compacted particles are provided. The compacted particles exhibit reduced levels of dust, and are durable during handling. The composition contains a pentaerythritol phosphite, a hindered phenolic isocyanurate, a metal salt of a fatty acid and hydrotalcite. The method involves blending the above ingredients and compacting them under pressure to form compacted particles, such as pellets. The compacted particles are useful as additives to polymeric compositions for stabilization thereof.
    Type: Grant
    Filed: October 7, 1994
    Date of Patent: March 7, 2000
    Assignee: General Electric Company
    Inventors: E. Scott Henkins, John C. Wittenauer
  • Patent number: 6022916
    Abstract: Melt extrusion processes involving phosphite stabilized polyolefin compositions subject to solid by-product formation during melt extrusion are improved by the addition of a metal salt of a lactic acid to the composition. The processes involving the improved compositions exhibit reduced levels of screen pack plugging during fiber and film extrusion processes than that achieved with fatty acid salts, such as calcium stearate.
    Type: Grant
    Filed: August 9, 1994
    Date of Patent: February 8, 2000
    Assignee: General Electric Company
    Inventors: William P. Enlow, Roger W. Avakian
  • Patent number: 5985960
    Abstract: A process for the preparation of a melamine condensation product comprising the step of heating a starting material comprising melamine or a melamine salt in the presence of: (i) at least one organic acid, (ii) at least one ammonia or melamine salt of the organic acid, or (iii) a mixture of (i) and (ii), under reaction conditions effective for the formation of the melamine condensation product. The melamine condensation product with a residual condensation agent content of less than 1 wt. % is useful in a moldable polymer composition possessing flame-retardant properties.
    Type: Grant
    Filed: June 2, 1997
    Date of Patent: November 16, 1999
    Assignee: DSM N.V. Octroolbureau
    Inventors: Augustinus E. H. de Keijzer, Bernardus J. H. Dijkstra
  • Patent number: 5859102
    Abstract: Plastic mixtures, in particular recycled plastic mixtures, comprising predominantly polyolefins and 0.05-20% by weight of PVDC can be stabilized against thermo-oxidative degradation by addition of a combination of an organic phosphite or phosphonite and a metal salt of a fatty acid.
    Type: Grant
    Filed: June 20, 1996
    Date of Patent: January 12, 1999
    Assignee: Ciba Speciality Chemicals Corporation
    Inventors: Rudolf Pfaendner, Heinz Herbst, Kurt Hoffmann
  • Patent number: 5849231
    Abstract: Melt extrusion processes involving phosphite stabilized polyolefin compositions subject to solid by-product formation during melt extrusion are improved by the addition of an epoxidized ester of a fatty acid to the composition. The processes involving the improved compositions exhibit reduced levels of screen pack plugging during fiber and film extrusion processes than that achieved with fatty acid salts, such as calcium stearate.
    Type: Grant
    Filed: March 29, 1993
    Date of Patent: December 15, 1998
    Assignee: General Electric Company
    Inventor: William P. Enlow
  • Patent number: 5844026
    Abstract: A mixture of the compounds identified in the title, their pure isomers and alkane-bridged derivatives are particularly effective in stabilizing polymer compositions, particularly polyolefin compositions.
    Type: Grant
    Filed: June 30, 1997
    Date of Patent: December 1, 1998
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: James P. Galbo, Henry C. Grace, Douglas W. Horsey, Peter Solera, Rangarajan Srinivasan
  • Patent number: 5770644
    Abstract: A fire retardant polyester resin composition comprising (A) 95 to 30 parts by weight of a polyester resin and (B) 5.0 to 70 parts by weight of a polyphenylene ether resin and/or polyphenylene sulfide resin, and, for 100 parts by weight in total of the components (A) and (B), (C) 0.05 to 10 parts by weight of a compatibilizing agent, (D) 2.0 to 45 parts by weight of a phosphoric ester compound or phosphonitrile compound, (E) 0 to 150 parts by weight of a reinforcing filler, (F) 0.001 to 15 parts by weight of an anti-dripping agent, (G) 0 to 45 parts by weight of a melamine cyanurate, and (H) 0 to 15 parts by weight of a polystyrene resin having epoxy group, provided that the amount of the component (G) is from 0.5 to 45 parts by weight for 100 parts by weight in total of the components (A) and (B) when the amount of the component (B) is less than 35 parts by weight. The polyester resin composition scarcely corrodes a metal mold when it is molded, and is excellent in fire retardancy.
    Type: Grant
    Filed: February 26, 1997
    Date of Patent: June 23, 1998
    Assignee: Mitsubishi Engineering Plastics Corporation
    Inventors: Masanori Yamamoto, Shintarou Kishimoto
  • Patent number: 5717014
    Abstract: A polyphenylene ether resin composition containing the following Components (A) to (D) according at the following formulation ratio.(A) 50 to 99.5 parts by weight of a polyphenylene ether(B) 0.5 to 50 parts by weight of a partially hydrogenated aromatic alkenyl compound-conjugated diene block copolymer having a hydroxy group and based on 100 parts by weight of the above resin composition,(C) 0 to 950 parts by weight of a thermoplastic resin and(D) 0 to 10 parts by weight of a phosphorous acid triester.
    Type: Grant
    Filed: November 25, 1996
    Date of Patent: February 10, 1998
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Ichiro Ohkawachi, Kiyoji Takagi, Koji Nishida
  • Patent number: 5708065
    Abstract: This invention relates to flame retardants for polyester and polyamide compositions, and specifically relates to compositions containing (1) about 30 to about 70 weight percent of a polyester or a synthetic, aliphatic polyamide or a mixture thereof; (2) about 15 to about 40 weight percent of glass or mineral reinforcing agent; and (3) a flame retardant of (a) about 20 to about 30 weight percent of melamine phosphate and up to about 10 weight percent of a charring catalyst; (b) about 15 to about 30 weight percent of melamine phosphate, up to about 10 weight percent of a charring catalyst and up to about 10 weight percent of a char former; (c) about 5 to about 45 weight percent of melamine pyrophosphate; (d) about 15 to about 30 weight percent of melamine pyrophosphate and up to about 10 weight percent of a charring catalyst; (e) about 15 to about 30 weight percent of melamine pyrophosphate, up to about 10 weight percent of a charring catalyst and up to about 10 weight percent of a char former, or (f) about 20
    Type: Grant
    Filed: December 19, 1996
    Date of Patent: January 13, 1998
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Marvin Michel Martens, Robert Valentine Kasowski, Kevin Bodle Cosstick, Robert Earl Penn
  • Patent number: 5695869
    Abstract: Melt-blown microfiber webs are prepared from polyarylene sulfide polymers, particularly polyphenylene sulfide. A small amount of a phosphite or phosphonite compound is added to the extruder feedstock. The additive essentially eliminates spurious polymer particle formation at the extruder die openings, even over sustained production periods. The polyarylene sulfide microfiber webs so produced are thus essentially free of spurious particulates, and the web defects which may be caused by such particulates.
    Type: Grant
    Filed: August 21, 1995
    Date of Patent: December 9, 1997
    Assignee: Hoechst Celanese Corporation
    Inventors: Andrew Bernard Auerbach, Warren Stephen Harmon
  • Patent number: 5674927
    Abstract: A solid amorphous phosphite stabilizer composition is provided which exhibits enhanced hydrolytic stability. The stabilizer composition preferably contains from 10 to 99.9 percent by weight of a phosphorous compound selected from phosphites and phosphonites, and preferably contains from 0.1 to 10 percent by weight of an aliphatic polyamine. The stabilizer composition exhibits enhanced hydrolytic stability, and is preferably in the form of powders or flakes. The stabilizer composition is useful as an additive to polymeric resins as an antioxidant stabilizer.
    Type: Grant
    Filed: November 16, 1995
    Date of Patent: October 7, 1997
    Assignee: General Electric Co.
    Inventor: James A. Mahood
  • Patent number: 5633301
    Abstract: The present invention is a flame retardant polyketone polymer composition which comprises: (a) a bicyclic phosphorus flame retardant compound, such as one containing one or more pentaerythritol phosphate alcohol moieties, as exemplified by bis(pentaerythritol phosphate alcohol) carbonate; (b) an intumescent flame retardant compound containing nitrogen and phosphorus, such as melamine phosphate; and (c), optionally, a monophosphate ester compound to enhance the compatibility of the composition in the polymer substrate, such as a liquid aryl-group containing phosphate ester compound or melamine phosphate, and the monophosphate ester compound is triphenyl phosphate.
    Type: Grant
    Filed: May 23, 1996
    Date of Patent: May 27, 1997
    Assignee: Akzo Nobel NV
    Inventors: Paul Y. Moy, Gerald R. Alessio
  • Patent number: 5618865
    Abstract: This invention relates to flame retardants for polyester and polyamide compositions, and specifically relates to compositions containing (1) about 30 to about 70 weight percent of a polyester or a synthetic, aliphatic polyamide; (2) about 15 to about 40 weight percent of glass or mineral reinforcing agent; and (3) a flame retardant of (a) about 20 to about 30 weight percent of melamine phosphate and up to about 10 weight percent of a charring catalyst; (b) about 15 to about 30 weight percent of melamine phosphate, up to about 10 weight percent of a charring catalyst and up to about 10 weight percent of a char former; (c) about 25 to about 30 weight percent of melamine pyrophosphate; (d) about 15 to about 30 weight percent of melamine pyrophosphate and up to about 10 weight percent of a charring catalyst; or (e) about 15 to about 30 weight percent of melamine pyrophosphate, up to about 10 weight percent of a charring catalyst and up to about 10 weight percent of a char former, wherein all percents by weight ar
    Type: Grant
    Filed: December 22, 1995
    Date of Patent: April 8, 1997
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Marvin M. Martens, Robert V. Kasowski
  • Patent number: 5594053
    Abstract: An stabilized thermoplastic composition comprising a stabilizing amount of a phosphite of the formula: ##STR1## R.sub.1 is independently selected from the group consisting of alkyl groups having from 1 to 9 carbon atoms, Y is independently selected from the group consisting of hydrogen, halogen, or alkyl; and the --O--X groups are positioned at the respective ortho- or para- positions with respect to the diphenyl linkage, the remaining ortho- and para- positions with respect to the --O--X linkage being occupied by R.sub.1 whereby the --0--X groups are hindered by the presence of at least one R.sub.1 group; R.sup.
    Type: Grant
    Filed: January 22, 1996
    Date of Patent: January 14, 1997
    Assignee: General Electric Company
    Inventors: Roger W. Avakian, Vaikunth S. Prabhu, William P. Enlow, Carloss L. Gray
  • Patent number: 5585423
    Abstract: Polymers of (N-lower alkyl)dimethylglutarimide or (N-hydrogen)dimethylglutarimide are resistant to surface crazing, molecular weight degradation and yellowing on exposure to ultraviolet light, by inclusion of a hindered amine stabilizer.
    Type: Grant
    Filed: January 11, 1991
    Date of Patent: December 17, 1996
    Assignee: Rohm and Haas Company
    Inventors: Leslie A. Cohen, Darnell DeGraff, Harry C. Fromuth, Theodore D. Goldman
  • Patent number: 5514742
    Abstract: A polymer composition is provided comprising an ultraviolet light sensitive phosphite and an amount of a polyamine effective to enhance the resistance of the color formation upon exposure to ultraviolet light. A process is also provided for applying ink to a thermoplastic substrate involving ultraviolet light curing of the ink. The thermoplastic compositions are useful for making article which contain UV sensitive phosphites for oxidative stability and also exhibit resistance to ultraviolet light yellowing of the phosphite. The inking process resists detrimental yellowing of the composition upon exposure to high levels of ultraviolet light radiation.
    Type: Grant
    Filed: February 3, 1995
    Date of Patent: May 7, 1996
    Assignee: General Electric Company
    Inventors: Pamela Gardner, James Mahood
  • Patent number: 5484830
    Abstract: Halogen-free, flame-resistant polymeric compositions contain an intumescence flameproofing system which comprises ammonium polyphosphate and an organophosphorus nitrogen component. The organophosphorus nitrogen component here is a phosphoric acid polyester according to the formula ##STR1## In these formulae, R is CH.sub.2, C.sub.2 H.sub.4 or C.sub.3 H.sub.6, while m is 1 to 10 and n is 1 to 6.
    Type: Grant
    Filed: January 26, 1994
    Date of Patent: January 16, 1996
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Horst Staendeke
  • Patent number: 5438086
    Abstract: A class of hydrolytically stable bis(aralkylphenyl)pentaerythritol diphosphites is disclosed, which is suitable as an antioxidant additives in polyolefins, particularly, in polypropylene. The diphosphites are of low volatility, have a high thermal decomposition temperature and resist yellowing when blended into a polyolefin base. A preferred diphosphite is bis(2,4-dicumylphenyl)pentaerythritol diphosphite.
    Type: Grant
    Filed: April 25, 1994
    Date of Patent: August 1, 1995
    Inventors: Donald R. Stevenson, Satyanarayana Kodali
  • Patent number: 5420326
    Abstract: Bis(pentaerythritol phosphate alcohol) hydrogen phosphonate is a flame retardant compound. Such a compound can be prepared by the transesterification of a diphenyl phosphite with pentaerythritol phosphate alcohol.
    Type: Grant
    Filed: May 12, 1994
    Date of Patent: May 30, 1995
    Assignee: Akzo Nobel N.V.
    Inventor: Jeffrey E. Telschow
  • Patent number: 5420184
    Abstract: Disclosed are a thermoplastic resin composition which comprises(A) 10 to 90% by weight of a polyphenylene ether,(B) 90 to 10% by weight of a saturated polyester,(C) 0.1 to 10 parts by weight of an organic phosphorous acid compound represented by the formula: ##STR1## wherein n represents 1 or 2; Ar represents an aryl group having 6 to 30 carbon atoms or a substituted aryl group and when n is 2, Ars may be the same or different; and R represents an alkylene group having 2 to 18 carbon atoms or arylene group when n is 1 and represents an alkanetetrayl group having 4 to 18 carbon atoms when n is 2, based on 100 parts by weight of Components (A) and (B) , and(D) 0 to 10 parts by weight of an acid receptor based on 100 parts by weight of Components (A) and (B),and a process for preparing the same.
    Type: Grant
    Filed: October 14, 1993
    Date of Patent: May 30, 1995
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Toru Tsukahara, Hiromi Nishimura, Yusuke Arashiro, Kiyoji Takagi, Koji Nishida
  • Patent number: 5420183
    Abstract: The invention provides a substantially uniformly blended, flame retardant polypropylene composition and an extruded polypropylene sheet which comprises a polypropylene polymer, the bis(2,3-dibromopropylether) of tetrabromobisphenol A, antimony trioxide, titanium dioxide, calcium sulfate and distearyl pentaerythritol diphosphite. The invention further provides a method for producing such a polypropylene sheet material by forming a substantially uniform physical blend of the above components; drying the blend; heating the blend at a temperature above its melting point to form a melt of the blend components while mixing the melt; and extruding the blend through a sheet forming die and highly polished rollers.
    Type: Grant
    Filed: July 6, 1993
    Date of Patent: May 30, 1995
    Assignee: HPG International, Inc.
    Inventors: Arthur A. Arena, Parvin Sawhney