Two Or More Phenolic Reactants Patents (Class 528/204)
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Patent number: 7138479Abstract: The disclosure provides high quality, low yellowness index copolycarbonates comprising structural units derived from at least one aliphatic diol, at least an aromatic dihydroxy compound and a diaryl carbonate. Also disclosed herein is a method of making such copolycarbonates in presence of one or more catalysts.Type: GrantFiled: May 28, 2004Date of Patent: November 21, 2006Assignee: General Electric CompanyInventors: Dibakar Dhara, Abbas Alli G. Shaikh, Gautam Chatterjee, C. Seetharaman
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Patent number: 6987141Abstract: The invention relates to a polycarbonate resin composition, including (1) a colored composition that comprises two types of specifically-terminated aromatic polycarbonates along with an inorganic filler added thereto, (2) a composition that comprises a polycarbonate resin terminated with a specific phenoxy group, a functional group-having silicone compound and a core/shell-type grafted rubber-like elastomer, and (3) a composition that comprises a specifically-terminated aromatic polycarbonate-polyorganosiloxane copolymer, a specifically-terminated aromatic polycarbonate and a fibril-forming polytetrafluoroethylene.Type: GrantFiled: October 25, 2001Date of Patent: January 17, 2006Assignee: Idemitsu Kosan Co., Ltd.Inventors: Masaya Okamoto, Akio Nodera, Yasuhiro Ishikawa
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Patent number: 6780956Abstract: The invention relates to a method of preparing silicone copolycarbonates which incorporate both blocky and random substructures. Such silicone-containing copolycarbonates are useful in the preparation of a variety of molded articles such as optical disks. The structure of the compositions prepared by the method of the invention is determined by the method of preparation used and may be used to control physical properties. The copolymers are prepared by forming in a first step an intermediate silicone copolycarbonate possessing either a blocky or random structure and reactive endgroups, and then appending additional structural in a second step which is complimentary to the first step and produces a product silicone copolycarbonate having both random and blocky substructures. The repeat units I and II appended in the second step may be the same or different as those repeat units I and II incorporated in the first step.Type: GrantFiled: October 2, 2002Date of Patent: August 24, 2004Assignee: General Electric CompanyInventor: Gary Charles Davis
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Patent number: 6740714Abstract: A thermoplastic molding composition suitable for making articles having good combination of properties is disclosed. The composition contains (A) a copolycarbonate derived from compounds of formula (I) wherein R1 to R4 independently of one another represent H, C1-C4-alkyl, phenyl, substituted phenyl or halogen, and compounds of formula (II) wherein R5 to R8 independently of the others denote H, CH3, Cl or Br and X is C1-C5-alkylene, C2-C5-alkylidene, C5-C6-cycloalkylene, C5-C10-cycloalkylidene, and (B) a homopolycarbonate derived from bisphenol A. The composition that features resistance to stress cracking and good low-temperature properties is suitable for automotive construction and exterior applications.Type: GrantFiled: July 17, 2002Date of Patent: May 25, 2004Assignee: Bayer AktiengesellschaftInventors: Silke Kratschmer, Klaus Horn, Michael Erkelenz
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Patent number: 6740728Abstract: The present invention relates to methods for the preparation of polyesters, poly(ester amide)s and poly(ester imide)s. The materials obtained by the methods of present invention are useful as fluid separation membranes and as high performance materials.Type: GrantFiled: May 24, 2002Date of Patent: May 25, 2004Assignee: Praxair Technology, Inc.Inventors: Yong Ding, Benjamin Bikson
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Publication number: 20040087756Abstract: Stable, homogeneous melt solutions are prepared at temperatures of 200° C. or less from solid mixtures comprising at least one diaryl carbonate, at least one high melting dihydroxy aromatic compound (mp>200° C.), a transesterification catalyst, and optionally a lower melting dihydroxy aromatic compound. Thus, a stable, homogeneous melt solution is obtained from a solid mixture comprising 4,4′-biphenol (mp 282-284° C.) at a temperature of about 200° C. using either diphenyl carbonate or bis(methyl salicyl) carbonate as the diaryl carbonate component. It is shown that formation of the stable, homogeneous melt solutions requires the presence of the transesterification catalyst when substantial amounts of the high melting dihydroxy aromatic compound are present in the initial solid mixture.Type: ApplicationFiled: November 4, 2002Publication date: May 6, 2004Applicant: General Electric CompanyInventors: Narayan Ramesh, Patrick Joseph McCloskey, Kathryn Lynn Longley
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Patent number: 6716955Abstract: A poly(arylene ether) polymer includes polymer repeat units of the following structure: —(O—Ar1—O—Ar2—)m—(O—Ar3—O—Ar4—)n— where Ar1, Ar2, Ar3, and Ar4 are identical or different aryl radicals, m is 0 to 1, n is 1-m, and at least one of the aryl radicals is grafted to at least one unsaturated group that is non-aromatic and is adapted to crosslink at a curing temperature below 20° C. without producing volatiles during curing and without providing functional groups after curing. Cured films containing the polymer can have a Tg from 160° C. to 180° C., a dielectric constant below 2.7 with frequency independence, and a maximum moisture absorption of less than 0.17 wt %. Accordingly, the polymer is especially useful in interlayer dielectrics and in die-attach adhesives.Type: GrantFiled: January 14, 2002Date of Patent: April 6, 2004Assignee: Air Products and Chemicals, Inc.Inventor: William Franklin Burgoyne, Jr.
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Patent number: 6689863Abstract: A polycarbonate copolymer comprising structural units derived from a cyclohexylidene bis(alkylphenol) of the formula: wherein A1 is a trisubstituted aromatic radical having the formula C6H3R2, wherein R2 is selected from the group consisting of C1-C6 alkyl radicals, and combinations comprising at least one of the foregoing radicals; a long chain alkyl-substituted bisphenol of the formula wherein A2 is a substituted or unsubstituted aromatic radical; and R1 is selected from the group consisting of C13-C22 alkyl radicals; a carbonic acid diester; and optionally at least one aromatic dihydroxy compound of the formula: HO—A3—OH, wherein A3 is selected from divalent substituted and unsubstituted aromatic radicals.Type: GrantFiled: October 8, 2002Date of Patent: February 10, 2004Assignee: General Electric CompanyInventors: Veeraraghavan Srinivasan, Rein Mollerus Faber, Prakash P. Wadgaonkar, Chilukuri Ver Avadhani, Jan Pleun Lens, Gautam Chatterjee
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Publication number: 20040024168Abstract: It is to provide a branched aromatic polycarbonate excellent in hue and excellent in melt properties such as melt strength.Type: ApplicationFiled: August 5, 2003Publication date: February 5, 2004Applicant: MITSUBISHI CHEMICAL CORPORATIONInventors: Masaaki Miyamoto, Takao Tayama
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Publication number: 20040002577Abstract: The present invention relates to a synthetic method comprising contacting at least one diaryl carbonate with one or more dihydroxy aromatic compounds in the presence of a transesterification catalyst under melt polymerization conditions to afford a product polycarbonate. The transesterifcation catalysts used according to the method of the present invention are polyhydropolyborates in combination with tetraalkylammonium or tetraalkylphosphonium compounds which serve as co-catalysts. The transesterification catalysts employed according to the method of the present invention provide polycarbonates having reduced levels of Fries rearrangement product relative to conventionally employed catalysts such as sodium hydroxide in combination with tetramethylammonium hydroxide co-catalyst.Type: ApplicationFiled: June 27, 2002Publication date: January 1, 2004Applicant: General Electric CompanyInventor: John Patrick Lemmon
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Patent number: 6630525Abstract: A polycarbonate is provided which contains residues of a dihydric phenol, at least one comonomer of a siloxane functional bisphenol, optionally, a branching agent and optionally, a flame retardant. Further embodiments of the present invention includes a method for producing a flame retardant polycarbonate.Type: GrantFiled: October 9, 2001Date of Patent: October 7, 2003Assignee: General Electric CompanyInventors: James Anthony Cella, James Ross Fishburn, James Alan Mahood
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Patent number: 6613869Abstract: A branched polycarbonate resin suitable for making containers is disclosed. The polycarbonate is characterized in that at 260° C. and shear rate of 10 s−1 it has a melt viscosity of 5500 to 900 Pas, and in that at 260° C. and shear rate of 1000 s−1 it has a melt viscosity of 880 tom 1500 Pas, and in that it has a melt flow index (MFR) of 0.1 to 3.0 g/10 min. A container made of the polycarbonate exhibits great breaking strength.Type: GrantFiled: April 12, 2002Date of Patent: September 2, 2003Assignee: Bayer AktiengesellschaftInventors: Klaus Horn, Ralf Hufen, Wolfgang Alewelt, Peter Gebauer, Franky Bruynseels
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Patent number: 6596839Abstract: A process for producing a wholly aromatic polyester which is excellent in heat resistance, mechanical properties and yet color and has a high degree of polymerization by melt polymerizing a dicarboxylic acid and a diol directly on an industrial scale at a low cost in a short period of time without esterifying the dicarboxylic acid or diol in advance. To produce the wholly aromatic polyester by reacting and molding an aromatic dicarboxylic acid such as terephthalic acid, an aromatic diol such as 2,2-bis(4-hydroxyphenyl)propane and a diaryl carbonate by heating, a combination of a specific pyridine compound and an alkali metal (bi)carbonate, a combination of a specific pyridine compound and an organic tin compound or a specific titanium compound is existent as a catalyst. Thereby, the wholly aromatic polyester having the above properties is obtained.Type: GrantFiled: July 8, 2002Date of Patent: July 22, 2003Assignee: Teijin LimitedInventors: Takanori Miyoshi, Hiroshi Sakurai, Toyoaki Ishiwata, Shunichi Matsumura
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Patent number: 6576735Abstract: A polycarbonate resin obtainable by reaction of a carbonic acid ester-forming compound with bisphenols consisting essentially of 9,9-bis(4-hydroxy-3-methylphenyl) fluorene and a bisphenol compound(s) having a polysiloxane skeleton, an intrinsic viscosity of said polycarbonate resin being 0.2 to 2.0 dl/g.Type: GrantFiled: September 12, 2001Date of Patent: June 10, 2003Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Tatsuya Kanagawa, Noriyoshi Ogawa, Hidekazu Nakatani, Noriaki Honda, Mitsuhiko Masumoto
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Patent number: 6566458Abstract: A block copolymer comprises structural units of the formula (I): wherein R1 comprises polysulfone groups and structural units of the formula (II): wherein R2 comprises polysiloxane groups.Type: GrantFiled: December 14, 2000Date of Patent: May 20, 2003Assignee: General Electric CompanyInventors: Miles A. Duncan, Lioba M. Kloppenburg, Parfait Jean Marie Likibi
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Patent number: 6492481Abstract: The invention relates to substantially single phase silicone copolycarbonates suitable for use in optical articles such as digital versatile disks. The silicone copolycarbonates contain residues of silicone containing and nonsilicone containing bisphenols and have properties particularly suited for use in high density optical data storage media. The invention further relates to the preparation and properties of substantially single phase silicone copolycarbonates having either a blocky or a random structure. The structure of the compositions of the invention is determined by the method of preparation used and may be used to control physical properties.Type: GrantFiled: July 10, 2000Date of Patent: December 10, 2002Assignee: General Electric CompanyInventors: Gary Charles Davis, Marc Brian Wisnudel, Irene Dris
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Patent number: 6462146Abstract: Copolymers of BPA and menthane bisphenols such as BPT1 and BPT2 can be used as a compatabilizer to allow the formation of homogeneous blends of BPA with menthane bisphenol polycarbonates such as poly-BPT1 or poly-BPT2 or copolymers thereof. Thus, a compatible polycarbonate blend is made by combining a bisphenol A polycarbonate, a menthane bisphenol polycarbonate and a BPA/menthane bisphenol copolymer compatabilizer, and mixing the combined materials to form a blend. The compatabilizer may contain one or more species of menthane bisphenol. In a specific example, BPT1 and BPT2 are used in the compatabilizer in a ratio, BPT1/BPT2, in the range of 70/30 to 10/90, preferably less than or equal to 1/1, for example around 30/70. By adjusting the relative amounts and the properties of the bisphenol A polycarbonate and the menthane bisphenol polycarbonate, the glass transition temperature and the toughness of the blend can be selected.Type: GrantFiled: March 27, 2001Date of Patent: October 8, 2002Assignee: General Electric CompanyInventor: James Mahood
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Publication number: 20020098430Abstract: An electrophotographic photoconductor has an electroconductive support, and a photoconductive layer formed thereon containing as an effective component an aromatic polycarbonate resin having a structural unit of formula (2) and a structural unit with charge transporting properties, each of the structural units being contained in an amount of 5 wt. % or more of the total weight of the polycarbonate resin. There is disclosed an aromatic polycarbonate resin having a structural unit of formula (1) and the structural unit of formula (2), with the relationship between the composition ratios being 0<k/(k+j)<1 when the composition ratio of the structural unit (1) is k and that of the structural unit (2) is j, or an aromatic polycarbonate resin having a repeat unit of formula (3). The formulas (1) to (3) are specified in the specification.Type: ApplicationFiled: January 22, 2002Publication date: July 25, 2002Applicant: RICOH COMPANY, LTD.Inventors: Shinichi Kawamura, Masaomi Sasaki, Kazukiyo Nagai, Kohkoku Ri, Susumu Suzuka, Katsuhiro Morooka
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Patent number: 6316071Abstract: A digital versatile disk (DVD) excellent in transferability on injection molding, and excellent in releasability from a mold and in strength is provided. The substrate of the digital versatile disk (DVD) comprises an aromatic polycarbonate resin composition containing a fatty acid monoglyceride having from 14 to 30 carbon atoms in an amount of from 0.015 to 0.05% by weight, wherein the aromatic polycarbonate resin contains an end group, 30% by mol or more of which is a p-cumylphenoxy group and/or a p-tert-octylphenoxy group, and has a viscosity average molecular weight (Mv) of from 10,000 to 17,000. The thickness of the substrate is generally 0.6 mm or less.Type: GrantFiled: August 23, 1999Date of Patent: November 13, 2001Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Munehiro Chosa, Masaya Okamoto, Yasuhiro Ishikawa
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Patent number: 6291125Abstract: A terpolymer represented by formula is useful in particular in electrophotographic imaging members.Type: GrantFiled: November 1, 1999Date of Patent: September 18, 2001Assignee: Xerox CorporationInventors: Dale S. Renfer, John F. Yanus, William W. Limburg, Damodar M. Pai, Paul J. DeFeo, Richard L. Schank
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Publication number: 20010017155Abstract: Polymers comprising triarylamine substituent monomers. The polymers are products of anionic or radical polymerization of monovinylated triarylamine monomers or of ROMP polymerization of monomers comprising a triarylamine component, a linker component, and a cyclic olefin that is capable of undergoing a ring-opening polymerization reaction. The resulting polymers possess hole-transporting properties and are useful as hole transport layers in light-emitting diodes or as components of photorefractive materials.Type: ApplicationFiled: February 8, 2001Publication date: August 30, 2001Inventors: Erika Bellmann, Sankaran Thayumanavan, Stephen Barlow, Robert H. Grubbs, Seth R. Marder, Bernard Kippelan, Neal R. Armstrong
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Patent number: 6268462Abstract: A branched polycarbonate resin which is prepared by using a tetrahydric phenol having a specific structure as the branching agent, has a branching agent content [branching agent/(dihydric phenol+terminating agent+branching agent)×100] of 0.05 to 0.5 mole % and satisfies the relationship: y≧11x +0.5 (wherein x is the branching agent content of the resin; and y is the melt tension (g) thereof at 280° C.); and a process for preparing a branched polycarbonate from a dihydric phenol, phosgene or a carbonic acid ester, a branching agent and an terminating agent, characterized by preparing an oligocarbonate, particularly one having chloroformate groups without the addition of the terminating agent, and then reacting the oligocarbonate with the dihydric phenol and the terminating agent.Type: GrantFiled: May 8, 2000Date of Patent: July 31, 2001Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Masaya Okamoto, Yasuhiro Ishikawa
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Patent number: 6042920Abstract: Copolycarbonates comprise structural units derived from a bisphenol such as bisphenol A, a spiro(bis)indane bisphenol such as 6,6'-dihdyroxy-3,3,3',3'-tetramethyl-1,1'-spiro(bis)indane and a polyoxyalkylene glycol such as polyethylene glycol. These copolycarbonates have high processability and are expected to have low birefringence. They are useful for the fabrication of optical disks.Type: GrantFiled: August 7, 1998Date of Patent: March 28, 2000Assignee: General Electric CompanyInventors: Gautam Chatterjee, Joseph Anthony King, Jr., Donald George LeGrand, Godavarthi Satyanarayana Varadarajan
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Patent number: 5993971Abstract: There is disclosed an optical information record medium having an optical information record layer on a transparent substrate, in which the transparent substrate is made of a resin material mainly consisting of a polycarbonate resin that contains no more than 4 wt % of low molecular weight fractions having a weight average measured with respect to a polystyrene molecular weight of no more than 3500, in order to avoid a double refraction of an optical information record medium resulting in an improved signal to noise ratio and having superior thermal-transformation resistance and impact resistance.Type: GrantFiled: May 19, 1993Date of Patent: November 30, 1999Assignee: Sony CorporationInventors: Keiichi Nito, Tohru Nagai, Tsutomu Noguchi, Mayumi Miyashita, Junetsu Seto, Katsumi Kohno
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Patent number: 5886073Abstract: Redistribution of polycarbonate compositions is effected in the presence of a tetraorganophosphonium hydroxide as catalyst and a catalyst decomposing amount of a polyhydroxyaliphatic compound such as glyceryl monostearate, pentaerythritol or ethylene glycol. Catalyst decomposition after redistribution improves the stability of the redistributed polycarbonate composition.Type: GrantFiled: November 3, 1997Date of Patent: March 23, 1999Assignee: General Electric CompanyInventors: Patrick Joseph McCloskey, David Michel Dardaris
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Patent number: 5876851Abstract: A film to be laminated on a metal, which is formed of a polycarbonate resin having a high concentration of terminal hydroxyl groups or a composition comprising said resin and a polyester resin or a film to be laminated on a metal, which is formed by laminating the above film and a polyester film. The film is excellent in adhesion to a metal plate, moldability, heat resistance, retort resistance, odor retention property, impact resistance dent resistance and processability into a can, such as drawing fabrication, ironing fabrication or the like for producing metal cans.Type: GrantFiled: January 19, 1995Date of Patent: March 2, 1999Assignee: Teijin LimitedInventors: Shunichi Matsumura, Ryoji Tsukamoto, Masaaki Tsukioka, Hiroo Inata, Seiji Itoh
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Patent number: 5863992Abstract: Branched polycarbonates having properties suitable for blow molding are prepared by equilibrating a linear or branched aromatic polycarbonate with certain tetraphenols, especially 2,2,5,5-tetrakis (4-hydroxyphenyl)hexane and ?1,1-bis(p-hydroxyphenyl)ethyl!-phenyl ether.Type: GrantFiled: December 17, 1996Date of Patent: January 26, 1999Assignee: General Electric CompanyInventors: Patrick Joseph McCloskey, David Michel Dardaris, YeGang Lin, Pin-Pin Wu, Jimmy Lynn Webb
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Patent number: 5858499Abstract: A polycarbonate copolymer which consists essentially of 5 to 95 mol % of recurring units containing a specific spiroglycol unit and 95 to 5 mol % of recurring units containing a specific biphenol unit, and has a reduced viscosity (.eta..sub.sp /c), measured at 20.degree. C. in a solution containing methylene chloride as a solvent and having a concentration of 0.5 g/dl, of at least 0.3 dl/g, a photoelasticity coefficient of 70.times.10.sup.-13 cm.sup.2 /dyne or less, and a glass transition temperature of at least 95.degree. C.; and a process for the production thereof. This polycarbonate copolymer is useful as a material for an information transmission medium or an information recording medium.Type: GrantFiled: December 19, 1996Date of Patent: January 12, 1999Assignee: Teijin LimitedInventors: Masanori Abe, Keisuke Shinohara, Wataru Funakoshi, Katsushi Sasaki
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Patent number: 5859833Abstract: Copolycarbonates having low intrinsic birefringence comprise structural units derived from hydroxyphenylindanol, from resorcinol, alkylenedioic acid or eugenolsiloxane, and, optionally, from a bisphenol, preferably bisphenol A. The copolycarbonates are useful for the fabrication of optical data recording media such as compact disks.Type: GrantFiled: September 2, 1997Date of Patent: January 12, 1999Assignee: General Electric CompanyInventors: Gautam Chatterjee, Gary Charles Davis
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Patent number: 5783653Abstract: A digital video disc substrate comprising a polycarbonate is herein disclosed in which a main chain has a structure represented by the general formula (I) ##STR1## and at least 25 mol % of this terminal group is represented by the formula (III) or (IV) ##STR2## and a viscosity-average molecular weight is in the range of 10,000 to 17,000, preferably 12,500 to 14,500.Type: GrantFiled: March 6, 1997Date of Patent: July 21, 1998Assignee: Idemitsu Petrochemical Co., Ltd.Inventor: Masaya Okamoto
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Patent number: 5750638Abstract: A method for producing poly-o-hydroxy amides by heating a dicarboxylic acid to a temperature .gtoreq.80.degree. C., together with a sulfonic acid chloride and a tertiary amine in a suitable solvent, to form a reaction mixture and reacting the mixture obtained with a bis-o-aminophenol solution at a temperature <80.degree. C.Type: GrantFiled: June 19, 1996Date of Patent: May 12, 1998Assignee: Siemens AktiengesesllschaftInventors: Recai Sezi, Hellmut Ahne, Roland Gestigkeit
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Patent number: 5658995Abstract: Random block copolymers having the formula: ##STR1## wherein R.sub.1 is --CH.dbd.CH-- or (--CH.sub.2 --).sub.j, in which j is zero or an integer from one to eight; R.sub.2 is selected from hydrogen, straight and branched alkyl and alkylaryl groups containing up to 18 carbon atoms and derivatives or biologically and pharmaceutically active compounds covalently bonded to said copolymer; each R.sub.3 is independently an alkylene group containing up to 4 carbon atoms; y is an integer between about 5 and about 3000; and f is the percent molar fraction of alkylene oxide in the copolymer and ranges between about 1 and about 99 mole percent. Implantable medical devices and drug delivery implants containing the random block copolymers are also disclosed, along with methods for drug delivery and for preventing the formation of adhesions between injured tissues employing the random block copolymers. Polyarylate random block copolymers are also described.Type: GrantFiled: November 27, 1995Date of Patent: August 19, 1997Assignee: Rutgers, The State UniversityInventors: Joachim B. Kohn, Chun Yu
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Patent number: 5625027Abstract: A process for producing a branched polycarbonate which comprises using a branching agent containing 200 ppm or less of sulfur; a branched polycarbonate which is prepared by the interfacial method and contains 1.0 ppm or less of residual sulfur as an impurity; and a branched polycarbonate which is prepared by the melting method and contains 2.0 ppm or less of residual sulfur as an impurity; are provided. When the branched polycarbonate is produced by the interfacial method, the branched polycarbonate produced does not show deterioration in heat stability or cause mold corrosion. When the branched polycarbonate is produced by the melting method, the branched polycarbonate produced does not show deterioration in heat stability or in color tone.Type: GrantFiled: September 20, 1995Date of Patent: April 29, 1997Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Shigeki Kuze, Ryozo Okumura, Seiji Takahashi
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Patent number: 5618890Abstract: The invention relates to polycarbonates (PC) terminated by allylphenols, preferably eugenol, and subsequently grafted with maleic anhydride (MA) in the melt, to their use as blending partners for polyamides (PA) and to the polycarbonate/polyamide blends.Type: GrantFiled: August 17, 1995Date of Patent: April 8, 1997Assignee: Bayer AktiengesellschaftInventors: Burkhard K ohler, Klaus Horn
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Patent number: 5606009Abstract: The present invention provides copolymerized copolyester-carbonates having improved flow and formability, in addition to excellent mechanical properties, heat resistance, transparency, and water resistance obtained by copolymerization of two or more aromatic dihydroxy compounds and a compound capable of reacting with those aromatic dihydroxy compounds to form carbonate linkages, characterized in that, of all the constituent repeating units derived from aromatic dihydroxy compounds, 2-40 mole % are derived from resorcin and/or substituted resorcins.Type: GrantFiled: February 17, 1995Date of Patent: February 25, 1997Assignee: General Electric CompanyInventors: Takeshi Sakashita, Tomoaki Shimoda, Takashi Nagai
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Patent number: 5604063Abstract: An electrophotographic member which can give printed images of high quality and is markedly high in photoresponsiveness can be provided without using halogen solvents by using a composition for charge transport layer which contains a polycarbonate resin having a recurring structural unit represented by the following formula (I) and, if necessary, a specific styryl compound, a specific hydrazone compound and the like: ##STR1## wherein R.sub.1 and R.sub.2 =alkyl, etc.R.sub.3 through R.sub.18 =H, alkyl, etc.k/m=1/1-10/1.Type: GrantFiled: November 16, 1992Date of Patent: February 18, 1997Assignee: Hitachi Chemical Company, Ltd.Inventors: Keiichi Endo, Seiji Miyaoka, Kouji Ohkoshi, Susumu Kaneko, Yasuo Katsuya, Akira Kageyama, Yoshii Morishita
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Patent number: 5602201Abstract: Resin composition comprising (A) 1-99 parts by weight of a copolymeric polycarbonate, in which there are structural units represented by the following formulas (Structure 1) and (Structure 2) and the amount of the structural unit of the (Structure 2) is in the range of 2-90 mol % of the total amount of the structural units of the (Structure 1) and (Structure 2), or its mixture with a polycarbonate resin; (B) 1-99 parts by weight of SAN resin; and at the same time, of the total amount of (A) and (B) as 100 parts by weight, (C) 0.5-40 parts by weight of ABS resin and (D) 0.5-40 parts by weight of a rubber complex graft copolymer comprising rubber complex containing polyorganosiloxane and polyalkyl (meth)acrylate with a graft-polymerized vinyl monomer.Type: GrantFiled: January 13, 1995Date of Patent: February 11, 1997Assignee: General Electric CompanyInventors: Tomohide Fujiguchi, Akihiro Saito, Hideyuki Itoi
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Patent number: 5597887Abstract: Blow moldable polycarbonate is produced by first producing a polycarbonate preform by a melt transesterification process. The polycarbonate preform comprises 2.1 to 10 mole percent polyfunctional branching agent, based on the total moles of polycarbonate in the polycarbonate preform. The polycarbonate preform is then melt equilibrated with a second polycarbonate to produce a blow moldable grade.Type: GrantFiled: August 9, 1995Date of Patent: January 28, 1997Assignee: General Electric CompanyInventors: Joseph A. King, Jr., Patrick J. McCloskey, Alice M. Colley, David M. Dardaris
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Patent number: 5556904Abstract: There is provided an aromatic polycarbonate copolymer obtained by reacting a dihydric phenol component comprising mainly 2,2-bis(4-hydroxyphenyl)-1,1,1,3,3,3-hexafluoropropane and 9,9-bis(4-hydroxyphenyl)fluorene or 1,1-bis(4-hydroxyphenyl)-1-phenylethane in a prescribed ratio with a carbonate precursor substance. This aromatic polycarbonate copolymer has a specific viscosity in a limited range. The aromatic polycarbonate copolymer is excellent in optical characteristics, transparency, hydrolysis resistance, heat resistance, oxidation resistance, and heat stability and good in moldability, and is suitable for a plastic optical waveguide that is small in transmission loss and excellent in heat resistance.Type: GrantFiled: January 17, 1995Date of Patent: September 17, 1996Assignees: The Furukawa Electric Co. Ltd, Teijin Chemicals Ltd.Inventors: Masaki Nishiguchi, Toshimasa Tokuda
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Patent number: 5556936Abstract: UV stabilized polycarbonates are provided having chemically combined polyhydric phenol benzotriazole carbonate units, such as 1,1-bis(4-hydroxyphenyl)-1-[4-hydroxy-3-(N-2-benzotriazole)phenyl]ethane carbonate units and methods for making. Incorporation of the polyhydric phenol benzotriazole functional units into the polycarbonate backbone can be achieved by redistribution or transesterification under melt polymerization conditions.Type: GrantFiled: November 17, 1994Date of Patent: September 17, 1996Assignee: General Electric CompanyInventors: Joseph A. King, Jr., Patrick J. McCloskey, Alice M. Colley, David M. Dardaris, Luca P. Fontana, Josef G. Berndsen
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Patent number: 5545710Abstract: The present invention provides the use of polycarbonates containing carbonate structural units of the formula (I), ##STR1## for the production of optical articles, novel polycarbonates, which contain the structural units (I), together with a process for the production of these novel polycarbonates.Type: GrantFiled: June 28, 1995Date of Patent: August 13, 1996Assignee: Bayer AktiengesellschaftInventors: Wilfried Haese, Friedrich Bruder, Ralf Pakull, J urgen Kirsch, Hartmut L ower
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Patent number: 5532331Abstract: This invention provides novel copolycarbonates that exhibit improvements in glass transition temperature, refractive index, and limiting oxygen index compared to prior art thiodiphenol/bisphenol A copolycarbonates. The copolycarbonates of this invention comprise the reaction products of 4,4'-thiodiphenol and compounds such as 9,9-bis (4-hydroxyphenyl) fluorene with phosgene. They are useful as components of multilayered polymeric reflective bodies.Type: GrantFiled: December 14, 1994Date of Patent: July 2, 1996Assignee: The Dow Chemical CompanyInventors: Stephen E. Bales, Charles A. Langhoff, John A. Wheatley
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Patent number: 5532324Abstract: A copolymeric polycarbonate containing repeating constituent units having formula [I] below and repeating constituent units having formula [II] below in a molar ratio of from 98:2 to 40:60. ##STR1## The above-described copolymeric polycarbonates have excellent resistance to chemicals, heat resistance and flame retardancy without compromising the impact resistance and good hues intrinsic to polycarbonates.Type: GrantFiled: October 12, 1995Date of Patent: July 2, 1996Inventors: Takeshi Sakashita, Tomoaki Shimoda, Kotaro Kishimura
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Patent number: 5527875Abstract: A process for producing an aromatic polycarbonate having a weight average molecular weight of from 7,000 to 60,000 is disclosed, comprising melt polycondensing an aromatic diol compound (e.g., bisphenol A) and a diaryl carbonate compound (e.g., diphenyl carbonate) in the presence of a combination of (a) an alkali metal compound and (b) a phosphonium hydroxide compound (e.g., tetraethylphosphonium hydroxide) as an interesterification catalyst. The aromatic polycarbonate has improved heat resistance and hue.Type: GrantFiled: February 9, 1995Date of Patent: June 18, 1996Assignee: Mitsubishi Chemical CorporationInventors: Masuzo Yokoyama, Fumio Keitoku, Junji Takano, Masami Hasegawa, Yukiko Tatsukawa
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Patent number: 5525701Abstract: Aromatic polycarbonates manufactured by polycondensation of a dihydric compound and a carbonic acid diester using at least two reactors in series have improved color and low impurities content when filtered before the final reactor and again before the final reactor outlet.Type: GrantFiled: December 12, 1994Date of Patent: June 11, 1996Assignee: General Electric CompanyInventors: Kenichi Tominari, Akio Kanezawa, Takeshi Sakashita, Kimiyoshi Miura, Tomoaki Shimoda
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Patent number: 5516877Abstract: There are disclosed carbonate polymers of dihydroxyaryl fluorene having crosslinkable moieties. There are also disclosed such polymers in the form of composites. The polymers of this invention are capable of being crosslinked by activation of the crosslinkable moieties. Once crosslinked, these polymers demonstrate an excellent combination of properties including resistance to melting at high temperatures, solvent resistance, optical clarity, impact resistance, and physical strength.Type: GrantFiled: August 16, 1994Date of Patent: May 14, 1996Assignee: The Dow Chemical CompanyInventors: Stephen E. Bales, James P. Godschalx, Philip C. Yang, Matthew T. Bishop, Maurice J. Marks
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Patent number: 5510450Abstract: The object of the present invention is to provide a method of producing copolymerized polycarbonates having improved flow and formability, in addition to excellent mechanical properties, heat resistance, transparency, and color tone.A method of producing copolymerized polycarbonates by melt polycondensation of two or more aromatic dihydroxy compounds with a carbonate diester, characterized in that(i) resorcin and/or substituted resorcins are used as 2-90 mole % of the aromatic dihydroxy compounds, where the sum of all the aromatic dihydroxy compounds is taken as 100 mole %, and(ii) an alkali metal compound and/or an alkaline-earth metal compound (a) is used as the catalyst.Type: GrantFiled: November 4, 1994Date of Patent: April 23, 1996Assignee: General Electric CompanyInventors: Takeshi Sakashita, Tomoaki Shimoda, Takashi Nagai
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Patent number: 5484875Abstract: The present invention relates to a method for preparing copolymeric polycarbonates which comprises melt polycondensing a mixture of an aromatic dihydroxy compound containing an amount of 2-90 mol % of hydroquinone or substituted hydroquinones and a diester carbonate in the presence of a catalyst containing an alkali metal compound or an alkaline earth metal compound in an amount of 1.times.10.sup.-8 to 5.times.10.sup.-6 mole per mole of the total amount of the aromatic dihydroxy compound, then adding an acidic compound to the melt polycondensation product.Type: GrantFiled: May 19, 1995Date of Patent: January 16, 1996Assignee: GE Plastics JapanInventors: Takeshi Sakashita, Tomoaki Shimoda, Kotaro Kishimura, Shuichi Uchimura
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Patent number: 5473046Abstract: A process for producing a branched polycarbonate which comprises using a branching agent containing 200 ppm or less of sulfur; a branched polycarbonate which is prepared by the interfacial method and contains 1.0 ppm or less of residual sulfur as an impurity; and a branched polycarbonate which is prepared by the melting method and contains 2.0 ppm or less of residual sulfur as an impurity; are provided. When the branched polycarbonate is produced by the interfacial method, the branched polycarbonate produced does not show deterioration in heat stability or cause mold corrosion. When the branched polycarbonate is produced by the melting method, the branched polycarbonate produced does not show deterioration in heat stability or in color tone.Type: GrantFiled: October 5, 1994Date of Patent: December 5, 1995Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Shigeki Kuze, Ryozo Okumura, Seiji Takahashi
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Patent number: 5470940Abstract: A transfer material supporting member is disclosed which contains at least a polymer represented by the formula (1) ##STR1## wherein each of R.sub.1 to R.sub.16 is a hydrogen atom, a halogen atom or an alkyl group, A is a divalent group, and each of X and Y is a copolymerization ratio. Also, an image forming device using the transfer material supporting member is disclosed.Type: GrantFiled: June 24, 1993Date of Patent: November 28, 1995Assignee: Canon Kabushiki KaishaInventors: Noriko Otani, Teigo Sakakibara