Material Is A Nitrogen-containing Compound Patents (Class 528/199)
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Patent number: 4506066Abstract: The present invention relates to high molecular weight thermoplastic hexahydro-furo-(3,2-b)-furane-3,6-diol based copolycarbonates useful as molding resins and to a method for their preparation.Type: GrantFiled: April 13, 1983Date of Patent: March 19, 1985Assignee: Bayer AktiengesellschaftInventors: Harald Medem, Manfred Schreckenberg, Rolf Dhein, Werner Nouvertne, Hans Rudolph
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Patent number: 4503213Abstract: The instant invention relates to a process for the preparation of linear aromatic polycarbonate resins by the known two-phase interfacial process and is directed to the use of perfluoroalkyl sulfonamides as chain stoppers in said process and is further directed to the polycarbonate resins obtainable by the process which resins are suitable in the preparation of thermoplastic molding compositions.Type: GrantFiled: June 21, 1983Date of Patent: March 5, 1985Assignee: Bayer AktiengesellschaftInventors: Sivaram Krishnan, Dieter Neuray, Wolfgang Cohnen, Klaus Geisler
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Patent number: 4471104Abstract: The present invention relates to the preparation of aromatic polycarbonates by the known two-phase interface process, from diphenols characterized in that aromatic sulfonanilides are used as chain terminators in amounts of about 2 mol % to 20 mol %, preferably in amounts of about 2.5 mol % to 10 mol %, relative to mols of diphenols employed. In addition, the present invention relates to the aromatic polycarbonates obtainable by the process according to the invention. The products of this invention have been found to have better self extinguishing property compared to polycarbonates without sulfonamide end groups.Type: GrantFiled: November 4, 1982Date of Patent: September 11, 1984Assignee: Bayer AktiengesellschaftInventors: Sivaram Krishnan, Wolfgang Cohnen, Dieter Neuray
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Interfacial polycondensation polycarbonate process with quaternary phosphonium amino halide catalyst
Patent number: 4471105Abstract: This invention relates to an improved interfacial polycondensation polycarbonate process wherein a dihydric phenol is reacted with a carbonyl halide in the presence of a quaternary-phosphonium amino halide catalyst.Type: GrantFiled: February 2, 1983Date of Patent: September 11, 1984Assignee: General Electric CompanyInventors: John R. Campbell, James W. Thackeray -
Patent number: 4452966Abstract: A process for producing polycarbonate is described, comprising reacting a chloroformate group-containing polycarbonate oligomer with an aqueous alkaline solution of a compound containing at least three functional groups and, thereafter, interfacial polycondensing the above-obtained reaction product with an aqueous alkaline solution of a dihydric phenol compound. The thus-produced polycarbonate has good melt characteristics compared with conventional polycarbonates, and the dependence of melt viscosity on a rate of shear is large. Thus, the polycarbonate of the invention is suitable for extrusion molding, particularly for blow molding using an extrusion molding machine, and can provide good quality sheets or molds.Type: GrantFiled: April 5, 1983Date of Patent: June 5, 1984Assignee: Idemitsu Kosan Company LimitedInventors: Shigeru Matsuo, Masaaki Itoi
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Patent number: 4448953Abstract: A process for preparing an aromatic polycarbonate of controlled molecular weight which comprises interfacially reacting in water and an organic solvent, a dihydric phenol, a carbonate precursor and a molecular weight controlling effective amount of a compound of the formula ##STR1## wherein n is an integer having a value of from 0 to 5 inclusive; Y is a halide or hydroxyl; and each R is independently selected from the group consisting of alkyl radicals, aryl radicals, alkaryl radicals, aralkyl radicals, alkoxy radicals, aryloxy radicals, halides, ##STR2## radicals wherein R.sup.2 is selected from hydrogen, alkyl radicals or acyl radicals or R.sup.3 is an acyl radical or --C.tbd.N. The polymers are useful in injection molded articles.Type: GrantFiled: August 18, 1982Date of Patent: May 15, 1984Assignee: General Electric CompanyInventors: Niles R. Rosenquist, Victor Mark, Charles V. Hedges
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Patent number: 4448950Abstract: Polycarbonates are provided having improved critical thickness values based on an aromatic diphenol preferably bisphenol A and an aromatic diphenol thioether. By incorporating 2 up to 20 mole percent of the aromatic diphenol thioether based on the total diphenol content into the polymer, the critical thickness of the article molded from the polycarbonate is substantially improved.Type: GrantFiled: August 14, 1980Date of Patent: May 15, 1984Assignee: Mobay Chemical CorporationInventors: Arthur L. Baron, Parameswar Sivaramakrishnan
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Patent number: 4436839Abstract: A method for production of polycarbonate-polyether-blockcopolymers is provided. One or more solutions comprising bisphenol A and polyalkyleneglycol and a phosgene solution are added to a cooled initial reaction medium in a cooled reaction chamber in such a way that the phosgene contacts substantially the reaction partners from the one or more cooled solutions after they have spread in the reaction medium. Preferably the phosgene solution and the one or more solutions are added through tubes ending above the liquid level of the reaction medium such that the solutions added contact only within the stirred reaction mixture the reaction partner. The phosgene is employed in an excess of less than about 10 weight percent of the stochiometrically required weight amount relative to bisphenol A and polyalkyleneglycol. The polymer is useful in the production of membranes for dialysis, ultrafiltration and reverse osmosis.Type: GrantFiled: August 11, 1980Date of Patent: March 13, 1984Assignee: Akzo NVInventors: Joachim Behnke, Walter Loffelmann
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Patent number: 4393190Abstract: Novel carbonate polymers comprised of the reaction product of a dihydric phenol, a carbonate precursor, and at least one imide selected from the group of compounds represented by the formulae ##STR1##Type: GrantFiled: September 21, 1981Date of Patent: July 12, 1983Assignee: General Electric CompanyInventors: John A. Tyrell, Gary L. Freimiller
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Patent number: 4388455Abstract: Ordered ester/carbonate copolymers having improved properties at higher solids are provided by (1) contacting a dihydric organic compound such as bisphenol-A with a diacid halide such as terephthaloyl chloride and a carbonate precursor such as phosgene under conditions sufficient to form an ester/carbonate oligomer and (2) contacting the oligomer with additional carbonate precursor to produce the desired ordered ester/carbonate copolymer.Type: GrantFiled: May 17, 1982Date of Patent: June 14, 1983Assignee: The Dow Chemical CompanyInventor: Stephen E. Bales
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Patent number: 4384108Abstract: An improved interfacial polycondensation polycarbonate process, the improvement comprising an initial equilibrated pH range of 11 to 13, a temperature range of 15.degree. to 40.degree. C., a carbonyl halide rate of addition of 0.03 to 0.3 moles per minute per mole of aromatic dihydroxy compound, and a chain stopper content of 0.02 to 0.05 moles per mole of aromatic dihydroxy compound. The resulting aromatic polycarbonate exhibits improved chemical and physical properties having a weight average molecular weight within a range of from about 25,000 to 65,000, and a monocarbonate content of less than about 400 parts per million.Type: GrantFiled: June 22, 1981Date of Patent: May 17, 1983Assignee: General Electric CompanyInventors: John R. Campbell, Jerry C. Lynch
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Patent number: 4378454Abstract: Polycarbonates are prepared in homogeneous solutions from dihydric phenols and phosgene wherein the stoichiometric end point for the addition of phosgene is accurately controlled by using 4-(p-nitrobenzyl) pyridine as a colorometric indicator for the end point in a series of samples of the reaction solution.Type: GrantFiled: November 4, 1981Date of Patent: March 29, 1983Assignee: The Dow Chemical CompanyInventors: Kevin F. Dick, George E. Ham, James R. Gross
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Patent number: 4368315Abstract: This invention relates to a catalyzed equilibrated interfacial polycondensation aromatic polycarbonate process comprising forming an equilibrated substantially uniform agitated two-phase admixture containing an organic phase containing an inert solvent, and an aqueous phase containing a solution of an aromatic dihydroxy compound and a strong base, adding and reacting a carbonyl halide with the aromatic dihydroxy compound to form an aromatic polycarbonate, and separating and recovering the solid aromatic polycarbonate particulate from the liquid aqueous phase.Type: GrantFiled: April 27, 1981Date of Patent: January 11, 1983Assignee: General Electric CompanyInventor: Subhas K. Sikdar
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Patent number: 4363905Abstract: A polycarbonate transesterification process comprising reacting a bis(ortho-nitroaryl)carbonate and a dihydric phenol under transesterification reaction conditions.Type: GrantFiled: April 23, 1980Date of Patent: December 14, 1982Assignee: General Electric CompanyInventor: Daniel J. Brunelle
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Patent number: 4361693Abstract: Poly(arylene ketones) are prepared by the reaction of difunctional aromatic compounds with derivatives of thio- or dithiocarbonic acids in the presence of a superacid catalyst system. In a preferred embodiment, diphenyl ether reacts with S-methyl chlorothioformate in HF/BF.sub.3 to produce poly(p-phenyleneoxy-p-phenylene carbonyl), i.e.Type: GrantFiled: July 8, 1981Date of Patent: November 30, 1982Assignee: Raychem CorporationInventor: Viktors Jansons
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Patent number: 4360659Abstract: This invention relates to a non-catalyzed equilibrated interfacial polycondensation aromatic polycarbonate process comprising forming an equilibrated substantially uniform agitated two-phase admixture containing an organic phase containing an inert solvent, and an aqueous phase containing a solution of an aromatic dihydroxy compound and a strong base, adding and reacting a carbonyl halide with the aromatic dihydroxy compound to form an aromatic polycarbonate, and separating and recovering the solid aromatic polycarbonate particulate from the liquid aqueous phase.Type: GrantFiled: May 6, 1981Date of Patent: November 23, 1982Assignee: General Electric CompanyInventor: Subhas K. Sikdar
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Patent number: 4346210Abstract: The present invention relates to a process for the preparation of aromatic polycarbonates from diphenols by the phase boundary process, which is characterized in that cyclic, preferably monocyclic or bicyclic, aza compounds are used as catalysts. The present invention also relates to the polycarbonates obtainable according to the process, which are distinguished by high light transmission and a low tendency to yellowing, even after relatively severe exposure to heat.Type: GrantFiled: October 26, 1979Date of Patent: August 24, 1982Assignee: Bayer AktiengesellschaftInventors: Wolfgang Alewelt, Dieter Margotte, Claus Wulff, Hugo Vernaleken
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Patent number: 4345062Abstract: An improved aromatic polycarbonate transesterification process comprising reacting a bis(aryl)carbonate and a phenol in the presence of a transesterification catalyst containing tetraborate or tetraaluminate anions, the improvement wherein the catalyst species is pre-formed under equilibration reaction conditions with either a phenol or a bis(aryl)carbonate prior to initiation of the transesterification reaction.Type: GrantFiled: May 11, 1981Date of Patent: August 17, 1982Assignee: General Electric CompanyInventor: Daniel J. Brunelle
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Patent number: 4330664Abstract: An improved aromatic polycarbonate transesterification process comprising reacting a bis(aryl)carbonate and a dihydric phenol in the presence of a transesterification catalyst, the improvement wherein the catalyst contains an aluminum hydride or borohydride group.Type: GrantFiled: April 27, 1981Date of Patent: May 18, 1982Assignee: General Electric CompanyInventor: Daniel J. Brunelle
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Patent number: 4327015Abstract: The invention is directed to flame-resistant, transparent aromatic polycarbonate compositions comprising polycarbonate resin and an additive amount of a member selected from the group consisting of aldehyde-bisulphite adducts and ketone-bisulphite adducts.Type: GrantFiled: May 11, 1981Date of Patent: April 27, 1982Assignee: Bayer AktiengesellschaftInventors: Frank Druschke, Dieter Margotte, Wolfgang Cohnen, Karsten Idel
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Patent number: 4316980Abstract: The present invention relates to a process for the preparation of thermoplastic, aromatic polycarbonates which contain structural units of the formulae 1 and/or 2 ##STR1## in which R denotes C.sub.1 -C.sub.3 -alkyl, preferably CH.sub.3, andX denotes a single bond, C.sub.1 -C.sub.5 -alkylene, C.sub.2 -C.sub.5 -alkylidene, cyclohexylene, cyclohexylidene, --O-- or --S--.Type: GrantFiled: January 14, 1980Date of Patent: February 23, 1982Assignee: Bayer AktiengesellschaftInventors: Karsten Idel, Volker Serini, Dieter Freitag, Gerd Fengler
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Patent number: 4316981Abstract: An improved transesterification process wherein a bis(ortho-nitroaryl)carbonate and a dihydric phenol are reacted to form a polycarbonate under transesterification reaction conditions, the improvement comprising the use of a hypernucleophilic base.Type: GrantFiled: June 13, 1980Date of Patent: February 23, 1982Assignee: General Electric CompanyInventor: Daniel J. Brunelle
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Patent number: 4299948Abstract: The subject of the instant invention are polycarbonates based on diphenols of the formula I ##STR1## wherein Y is a single bond, an elkylene- or alkylidene-radical with 1 to 7 carbon atoms, a cycloalkylene- or cycloalkylidene-radical with 5 to 12 carbon atoms, ##STR2## which have weight average molecular weights (M.sub.LS) measured by light scattering of at least 15 000 and which are characterized in having an average of zero to 1.5 mols, preferably 0.3 to 1.0 mols and especially 0.3 to 0.8 mols endgroups per mol polycarbonate.The subject of instant invention is also a process for preparing these polycarbonates according to the interfacial polycondensation method, the polycarbonates thus obtained and the use of the polycarbonates according instant invention for the preparation of compounds and films.Type: GrantFiled: November 26, 1979Date of Patent: November 10, 1981Assignee: Bayer AktiengesellschaftInventors: Kurt Weirauch, Alfred Horbach, Hugo Vernaleken
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Patent number: 4297455Abstract: The present invention relates to a process for the preparation of bis-carbonic acid aryl esters of polyester-diols, lengthened via --OCOO-- groups, characterized in that polyester-diols with molecular weights Mn (number-average) of over 250, preferably over 600, are heated with carbonic acid bis-aryl esters at temperatures between about 100.degree. C. and 200.degree. C., preferably between about 110.degree. C. and 180.degree. C., in vacuo below about 35 mm Hg, preferably between about 25 and 1 mm Hg, in the presence of catalysts, less than one mol of carbonic acid bis-aryl ester being employed per OH group of the polyester-diol and the hydroxyaryl compounds formed being distilled off.Type: GrantFiled: May 30, 1978Date of Patent: October 27, 1981Assignee: Bayer AktiengesellschaftInventors: Christian Lindner, Carlhans Suling, Herbert Bartl, Manfred Schreckenberg, Dieter Freitag, Klaus Konig
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Patent number: 4291151Abstract: An interfacial polymerization process for preparing high molecular weight aromatic polycarbonates by reacting a dihydric phenol with a carbonate precursor in the presence of a catalytic amount of certain cyclic di- or triamines or salts of cyclic di- or triamines.Type: GrantFiled: December 28, 1979Date of Patent: September 22, 1981Assignee: General Electric CompanyInventor: Victor Mark
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Patent number: 4291150Abstract: An interfacial polymerization process for preparing high molecular weight aromatic polycarbonates by reacting a dihydric phenol with a carbonate precursor in the presence of a catalytic amount of certain non-cyclic polyamines or salts of non-cyclic polyamines.Type: GrantFiled: December 28, 1979Date of Patent: September 22, 1981Assignee: General Electric Co.Inventor: Victor Mark
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Patent number: 4286084Abstract: An interfacial polymerization process for preparing high molecular weight aromatic polycarbonates by reacting a dihydric phenol with a carbonate precursor in the presence of a catalytic amount of a 5 to 8 membered heterocyclic compound which contains only carbon and nitrogen atoms in the ring and further characterized in that the ring contains at least two nitrogen atoms and at least one carbon atom, and in that the ring is aromatic in character and contains a maximum amount of olefinic unsaturation.Type: GrantFiled: December 28, 1979Date of Patent: August 25, 1981Assignee: General Electric CompanyInventor: Victor Mark
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Patent number: 4286085Abstract: An interfacial polymerization process for preparing a high molecular weight aromatic carbonate polymer by reacting a dihydric phenol with a carbonate precursor in the presence of a catalytic amount of a substituted pyridine or a salt of a substituted pyridine.Type: GrantFiled: December 28, 1979Date of Patent: August 25, 1981Assignee: General Electric CompanyInventors: Donald B. G. Jaquiss, Victor Mark, Lawrence C. Mitchell
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Patent number: 4286083Abstract: A novel process is disclosed for the preparation of copolyesters containing both carboxylate and carbonate groups. The process comprises reacting a carbonyl halide with a difunctional carboxylic acid and a dihydroxy compound in a reaction media which comprises water and a water immmiscible solvent in the presence of a tertiary amine.Type: GrantFiled: April 30, 1979Date of Patent: August 25, 1981Assignee: General Electric CompanyInventor: John E. Kochanowski
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Patent number: 4286086Abstract: An interfacial polymerization process for preparing high molecular weight aromatic polycarbonates by reacting a dihydric phenol with a carbonate precursor in the presence of a catalytic amount of certain sterically hindered secondary amines or their salts.Type: GrantFiled: December 28, 1979Date of Patent: August 25, 1981Assignee: General Electric CompanyInventor: Victor Mark
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Patent number: 4281101Abstract: The subject of instant invention is a process for the preparation of aliphatic-aromatic polycarbonates with diphenol carbonate end groups, the polycarbonates obtained therefrom and their use for the preparation of high-molecular, segmented, aliphatic-aromatic polycarbonate elastomers which can be processed as thermoplastics.Type: GrantFiled: May 31, 1979Date of Patent: July 28, 1981Assignee: Bayer AktiengesellschaftInventors: Manfred Schreckenberg, Klaus Konig, Dieter Freitag, Gunther Lehnert, Christian Lindner
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Patent number: 4277599Abstract: An interfacial polymerization process for preparing a high molecular weight aromatic carbonate polymer by reacting a dihydric phenol with a carbonate precursor in the presence of a catalytic amount of a compound selected from pyrroles and pyrrole salts.Type: GrantFiled: December 28, 1979Date of Patent: July 7, 1981Assignee: General Electric CompanyInventor: Victor Mark
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Patent number: 4277598Abstract: An interfacial polymerization process for preparing high molecular weight aromatic polycarbonates by reacting a dihydric phenol with a carbonate precursor in the presence of a catalytic amount of a cyclic amidine.Type: GrantFiled: December 28, 1979Date of Patent: July 7, 1981Assignee: General Electric CompanyInventors: Walter L. Hall, Donald B. G. Jaquiss, Victor Mark
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Patent number: 4277597Abstract: An interfacial polymerization process for preparing high molecular weight polycarbonates by reacting a dihydric phenol with a carbonate precursor in the presence of a catalytic amount of a sterically hindered heterocycloaliphatic secondary amine or a salt thereof.Type: GrantFiled: December 28, 1979Date of Patent: July 7, 1981Assignee: General Electric CompanyInventor: Victor Mark
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Patent number: 4268658Abstract: An interfacial polymerization process for preparing high molecular weight polycarbonates by reacting a dihydric phenol with a carbonate precursor in the presence of a catalytic amount of an iminoether or its salt.Type: GrantFiled: December 28, 1979Date of Patent: May 19, 1981Assignee: General Electric CompanyInventor: Victor Mark
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Patent number: 4267303Abstract: This disclosure is concerned with a single step process for the production of diphenol terminated polycarbonates by the transesterification of diphenols, bis-aryl carbonates and polymeric diols with aliphatically bound terminal hydroxyl groups. These diols are selected from polyesters, polyethers, polythioethers and polyacetals. The transesterification is carried out at elevated temperatures under vacuum optionally in the presence of a catalyst with the ratios of the reactants being such as to avoid the retention of any terminal aliphatic hydroxyl groups or aryl carbonate groups.Type: GrantFiled: August 27, 1979Date of Patent: May 12, 1981Assignee: Bayer AktiengesellschaftInventors: Klaus Konig, Manfred Schreckenberg, Christian Lindner, Carlhans Suling, Dieter Freitag
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Patent number: 4267305Abstract: An interfacial polymerization process for preparing a high molecular weight aromatic carbonate polymer by reacting a dihydric phenol with a carbonate precursor in the presence of a catalytic amount of a nitrogen-containing crown-cyclic compound.Type: GrantFiled: December 28, 1979Date of Patent: May 12, 1981Assignee: General Electric CompanyInventor: Victor Mark
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Patent number: 4262113Abstract: An interfacial polymerization process for preparing high molecular weight aromatic polycarbonates by reacting a dihydric phenol with a carbonate precursor in the presence of a catalytic amount of an amino amidine or amino guanidine.Type: GrantFiled: December 28, 1979Date of Patent: April 14, 1981Assignee: General Electric CompanyInventors: Donald B. G. Jaquiss, Victor Mark
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Patent number: 4262110Abstract: An interfacial polymerization process for preparing a high molecular weight aromatic carbonate polymer by reacting a dihydric phenol with a carbonate precursor in the presence of a catalytic amount of certain cyclic iminoethers or their salts.Type: GrantFiled: December 28, 1979Date of Patent: April 14, 1981Assignee: General Electric CompanyInventor: Victor Mark
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Patent number: 4262111Abstract: An interfacial polymerization process for preparing high molecular weight polycarbonates by reacting a dihydric phenol with a carbonate precursor in the presence of a catalytic amount of a non-cyclic amidine.Type: GrantFiled: December 28, 1979Date of Patent: April 14, 1981Assignee: General Electric CompanyInventors: Walter L. Hall, Donald B. G. Jaquiss, Victor Mark
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Patent number: 4262112Abstract: An interfacial polymerization process for preparing a high molecular weight aromatic carbonate polymer by reacting a dihydric phenol with a carbonate precursor in the presence of a catalytic amount of a cyclic isourea compound.Type: GrantFiled: December 28, 1979Date of Patent: April 14, 1981Assignee: General Electric CompanyInventor: Victor Mark
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Patent number: 4260719Abstract: Polycarbonate resins can be rendered resistant to ultraviolet light by chain-stopping the resins with certain cyanoacrylate moieties.Type: GrantFiled: March 17, 1980Date of Patent: April 7, 1981Assignee: General Electric CompanyInventor: Ta-Yen Ching
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Patent number: 4258174Abstract: An interfacial polymerization process for preparing a high molecular weight aromatic carbonate polymer by reacting a dihydric phenol with a carbonate precursor in the presence of a catalytic amount of an isourea compound.Type: GrantFiled: December 28, 1979Date of Patent: March 24, 1981Assignee: General Electric CompanyInventor: Victor Mark
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Patent number: 4252939Abstract: An aromatic polyester-polycarbonate is prepared by(a) forming a low molecular weight polyester oligomer possessing terminal -OH groups by reacting a solution of a terephthaloyl chloride compound in an organic solvent with a dihydroxy-diaryl compound in an aqueous alkaline solution;(b) reacting said oligomer with phosgene thereby converting said terminal -OH groups to terminal -OCOCl groups; and(c) preparing the desired aromatic polyester-polycarbonate product by polycondensing the product of step (b) with a dihydroxy-diaryl compound in an aqueous alkaline solution.Type: GrantFiled: June 12, 1979Date of Patent: February 24, 1981Assignee: Mitsubishi Chemical Industries, LimitedInventors: Hajime Mori, Katsuhisa Kohyama, Katsuhiko Nakamura, Katsuyuki Sakata
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Patent number: 4247475Abstract: Certain cyanochloroformates are described which have utility for imparting UV stability to polycarbonate resins.Type: GrantFiled: March 17, 1980Date of Patent: January 27, 1981Assignee: General Electric CompanyInventor: Ta-Yen Ching
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Patent number: 4224434Abstract: A continuous process for obtaining highly pure, high molecular weight aromatic polycarbonates from highly pure, halogenated diphenols.Type: GrantFiled: February 28, 1978Date of Patent: September 23, 1980Assignee: General Electric CompanyInventors: Clayton B. Quinn, Charles A. Wilson, II
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Patent number: 4219635Abstract: Poly(ester/carbonates) are produced by adding phosgene to a reaction mixture of bisphenol A and terephthalic acid as ester-forming reactants, at mole ratios in the range between 2.0:0.8 and 2.0:1.3, in which the reaction medium consists essentially of pyridine, the concentration of bisphenol A plus terephthalic acid is in the range between 5 and 50 grams per 100 ml of pyridine; and the phosgene is added under agitation at a rate of at least 0.07 gm-mmole/liter.sec. The process is carried out at temperature in the range between 50.degree. C. and 115.degree. C. and not below the temperature given by the Arrhenius equation:1nU=10-12/0.001987 Twhere U is phosgene feed rate in gram-moles/liter.second and T is absolute temperature of the reaction mixture (degrees Kelvin). Preferred phosgene feed rates are at least 0.13 gram-millimoles/liter.second; and preferred temperatures of the reaction mixture are between 60.degree. C. and 80.degree. C.Type: GrantFiled: January 26, 1979Date of Patent: August 26, 1980Assignee: Allied Chemical CorporationInventors: Robert S. Cooke, Josefina T. Baker, Stylianos Sifniades
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Patent number: 4217437Abstract: The present invention relates to the transesterification of the carbonic acid aryl esters obtainable according to German Published Patent Specification No. 2,650,533 with an excess of diphenol for the preparation of polyalkylene oxide-diol bis-diphenol carbonates lengthened via carbonate groups. The present invention also relates to the polyalkylene oxide-diol bis-diphenol carbonates, lengthened via carbonate groups, obtained according to the invention and their use for the preparation of polyether/polycarbonates. Finally, the present invention relates to the polyether/polycarbonates, obtained according to the invention, with an improved phase separation between the elastomeric segment and hard segment, which leads to better technological properties of the corresponding polycarbonate elastomers.Type: GrantFiled: June 8, 1978Date of Patent: August 12, 1980Assignee: Bayer AktiengesellschaftInventors: Manfred Schreckenberg, Dieter Freitag, Christian Lindner, Carlhans Suling, Herbert Bartl, Klaus Konig
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Patent number: 4210731Abstract: There are provided aromatic polyformal-polycarbonate block polymers and method for making such materials. The polyformal-polycarbonate block polymers can be made by phosgenating a mixture of a bisphenol and oligomeric aromatic polyformal having terminal phenolic groups. The aromatic block polymers are high performance thermoplastics having improved hydrolytic stability compared to aromatic polycarbonates and improved heat distortion temperature compared to conventional aromatic polyformal.Type: GrantFiled: September 18, 1978Date of Patent: July 1, 1980Assignee: General Electric CompanyInventors: Howard M. Relles, Donald S. Johnson
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Patent number: 4210741Abstract: Phenolphthalein-dihydroxy aromatic compound polycarbonates are disclosed wherein the mole ratio of phenolphthalein to dihydroxy aromatic compound is in the range from about 0.05 to about 0.7 and the weight average molecular weight range is from about 25,000 to about 50,000 as determined by gel permeation chromatography.These copolymers exhibit improved impact strength, heat resistance, creep resistance, tensile strength at high temperates and stress crack resistance.Type: GrantFiled: April 18, 1977Date of Patent: July 1, 1980Assignee: The Dow Chemical CompanyInventor: Joseph M. Baggett