From Reactant Having A Halogen Atom Or Oxygen Single Bonded To A Carbonyl Group, E.g., Halo-c(=o)-, -o-c(=o)-o, Etc. Patents (Class 528/370)
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Patent number: 5723565Abstract: An epoxy resin composition comprises the cured reaction product of an epoxy base resin and a curing agent mixture. The curing agent mixture comprises an amino curative and a polyoxyalkylene polycarbonate. Liquid epoxy base resins cured with polyoxyalkyleneamines in the presence of polyoxyalkylene polycarbonates were harder and displayed improved tensile modulus, flexural strength and flexural modulus.Type: GrantFiled: April 12, 1993Date of Patent: March 3, 1998Assignee: Huntsman Petrochemical CorporationInventors: Michael Cuscurida, Kathy Beth Sellstrom
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Patent number: 5723562Abstract: Novel functionalized peroxides which may be used as crosslinking, grafting and curing agents, initiators for polymerization reactions and as monomers for condensation polymerizations to form peroxy-containing polymers, which in turn can be used to prepare block and graft copolymers, have the following Formula I: ##STR1## R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, X, Y.sup.1, Y.sup.2, Y.sup.3, Z.sup.1, Z.sup.2, x, y and z are as defined in the Summary of the Invention. The compounds of Formula I may be prepared by reacting hydroxy-containing tertiary hydroperoxides with diacid halides, phosgene, dichloroformates, diisocyanates, anhydrides and lactones to form the functionalized peroxides. These reaction products may be further reacted, if desired, with dialcohols, diamines, aminoalcohols, epoxides, epoxy alcohols, epoxy amines, diacid halides, dichloroformates and diisocyanates to form additional functionalized peroxides.Type: GrantFiled: December 5, 1996Date of Patent: March 3, 1998Assignee: Elf Atochem North America, Inc.Inventor: Daryl L. Stein
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Patent number: 5719259Abstract: Perfluoroalkylene oxide copolymer having acid fluoride moieties are prepared by reaction of hexafluoropropylene oxide and 1,2-epoxypentafluoropropane 3-fluorosulfate in the presence of a cesium alkoxide initiator. The copolymers may be cured at room temperature and are useful in sealant and coating formulations. Derivatives of the copolymers containing ester, amide, nitrile, and ether moieties are also disclosed.Type: GrantFiled: August 12, 1996Date of Patent: February 17, 1998Assignee: E. I. du Pont de Nemours and CompanyInventors: Galina Mikhailovna Tyul'ga, Olga Borisovna Platonova, Irina Gennadievna Solodkaya, Dimetrii Stefanovich Rondarev, Yurii Kalmanovich Starobin, Sergey Vasilievich Sokolov, Albertus VanCleeff
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Patent number: 5710210Abstract: Novel functionalized peroxides which may be used as crosslinking, grafting and curing agents, initiators for polymerization reactions and as monomers for condensation polymerizations to form peroxy-containing polymers, which in turn can be used to prepare block and graft copolymers, have the following Formula I: ##STR1## R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, X, Y.sup.1, Y.sup.2, Y.sup.3, Z.sup.1, Z.sup.2, x, y and z are as defined in the Summary of the Invention. The compounds of Formula I may be prepared by reacting hydroxy-containing tertiary hydroperoxides with diacid halides, phosgene, dichloroformates, diisocyanates, anhydrides and lactones to form the functionalized peroxides. These reaction products may be further reacted, if desired, with dialcohols, diamines, aminoalcohols, epoxides, epoxy alcohols, epoxy amines, diacid halides, dichloroformates and diisocyanates to form additional functionalized peroxides.Type: GrantFiled: June 6, 1995Date of Patent: January 20, 1998Assignee: Elf Atochem North America, Inc.Inventor: Daryl L. Stein
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Patent number: 5703200Abstract: This invention provides various copolymers comprising a first repeating unit of the chemical formula: ##STR1## in which R.sub.1 and/or R.sub.2 are alkyl groups and a second repeating units generally having the chemical formula: ##STR2## and combinations of two or more thereof wherein R is a hydrogen atom or a methyl group and the first repeating unit is less than 45 weight percent of the total weight of the copolymer. This invention also relates to use of these copolymers in the fabrication of absorbable surgical devices such as sutures and as coatings for medical devices. Additionally, described are blends and polyoxaesters containing the first repeating unit.Type: GrantFiled: March 15, 1996Date of Patent: December 30, 1997Assignee: Ethicon, Inc.Inventors: Rao S. Bezwada, Steven C. Arnold, Constance Ace
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Patent number: 5703196Abstract: A process for producing a polycarbonate having terminal hydroxyl groups obtained by reacting an aliphatic polyol with a carbonate monomer, characterized by comprising the first step of producing a low molecular weight polycarbonate while removing the alcohols produced as by-products from the reaction mixture containing the aliphatic polyol and the carbonate monomer and the second step of adding to the reaction mixture the carbonate monomer in portions or continuously under the conditions that the concentration of the aliphatic polyol in the reaction mixture in the first step is 5% by weight or less and effecting the reaction while removing the alcohols produced as by-products, whereby connecting the low molecular weight polycarbonates to one another through the carbonate monomer to heighten the molecular weight.Type: GrantFiled: October 8, 1996Date of Patent: December 30, 1997Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Shinji Funakoshi, Kenzou Kawai
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Patent number: 5676925Abstract: Contrast agents comprising gas-containing or gas-generating polymer microparticles and/or microballoons, in which the polymer is a biodegradable polymer containing units of formula--(O).sub.m --CO--O--C(R.sup.1 R.sup.2)--O--CO--(O).sub.n --(wherein R.sup.1 and R.sup.2 each represent hydrogen or a carbon-attached monovalent organic group or together form a carbon-attached divalent organic group, and m and n are each independently zero or one) may be used in diagnostic applications such as ultrasound and MR imaging.Type: GrantFiled: June 7, 1995Date of Patent: October 14, 1997Assignee: Nycomed Imaging ASInventors: Jo Klaveness, P.ang.l Rongved, Jan Solberg, Per Strande, Unni Nordby Wiggen, Keith Redford
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Patent number: 5670603Abstract: This invention relates to polymers having non-linear optical properties which polymers include fluorene moieties having at least one electron accepting group and at least one electon donating group substituted to different phenyl rings of the fluorene moiety.Type: GrantFiled: March 8, 1993Date of Patent: September 23, 1997Assignee: AlliedSignal Inc.Inventors: Chengjiu Wu, Jianhui Shan, Ajay Nahata
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Patent number: 5639843Abstract: The present invention relates to novel reaction products of azlactones and organometallic nucleophiles and the method of making these reaction products. The invention also relates to methods of using such reaction products to prevent or eliminate microbial and fungal growth on substrates. Reaction products can be provided that show improved antifouling and antimicrobial action.Type: GrantFiled: January 12, 1994Date of Patent: June 17, 1997Assignee: Minnesota Mining and Manufacturing CompanyInventors: Stefan A. Babirad, W. Stuart Bigham
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Patent number: 5637655Abstract: A process is disclosed whereby a polymeric resin (containing ester and/or carbonate bonds) is readily converted into a resin having a modified molecular structure. Accordingly, a cyclic carbonate (a monomer or oligomer) is transesterified with the polymer resin in the melt, preferably upon extrusion, optionally in the presence of a catalyst. Significantly, the cyclic carbonate which may include any of a variety of functional groups may, by the inventive process, be inserted into the structure of the polymer, effecting a modification to the structure and the properties of the resin. Among the disclosed beneficial modifications thus imparted to the resin are improved thermal stability, altered rheology and optical properties.Type: GrantFiled: July 2, 1996Date of Patent: June 10, 1997Assignee: Bayer CorporationInventors: Duane B. Priddy, Jr., Robert J. Kumpf
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Patent number: 5633342Abstract: A method is provided for the synthesis of environmentally degradable block copolymers which includes the sequential polymerization of polymer-forming materials in the presence of one or more polymerization reaction accelerants and catalysts. The accelerants are a class of hydrogen-labile compounds which act as polymerization initiators and accelerate the polymerization rate significantly. The environmentally degradable block copolymers produced include those comprising segments of polymers of alkylene oxides, trimethylene carbonates, lactones and cyclic esters of hydroxycarboxylic acids.Type: GrantFiled: October 27, 1995Date of Patent: May 27, 1997Assignee: Chronopol, Inc.Inventors: Dan W. Verser, Kevin H. Schilling, Xiaomao Chen
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Patent number: 5623026Abstract: Siloxanes containing epoxy groups having the formula 1 ##STR1## Formula 1 whereinA means a C.sub.1 -C.sub.20 alkyl radical with epoxy groupsB means R.sup.1 or AR.sup.1, R.sup.2 independently of each other, means C.sub.1 -C.sub.20 alkyl or C.sub.6 -C.sub.10 aryla means zero or a whole number from 1-100b means zero or a whole number from 1-100c means a whole number from 1-5.Type: GrantFiled: December 28, 1995Date of Patent: April 22, 1997Assignee: Bayer AktiengesellschaftInventors: Josef Buekers, Peter Bier, Sabine Schlitte, Hubertus Eversheim, Helmut-Martin Meier
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Patent number: 5612439Abstract: Novel functionalized peroxides which may be used as crosslinking, grafting and curing agents, initiators for polymerization reactions and as monomers for condensation polymerizations to form peroxy-containing polymers, which in turn can be used to prepare block and graft copolymers, have the following Formula I: ##STR1## R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, X, Y.sup.1, Y.sup.2, Y.sup.3, Z.sup.1, Z.sup.2, x, y and z are as defined in the Summary of the Invention. The compounds of Formula I may be prepared by reacting hydroxy-containing tertiary hydroperoxides with diacid halides, phosgene, dichloroformates, diisocyanates, anhydrides and lactones to form the functionalized peroxides. These reaction products may be further reacted, if desired, with dialcohols, diamines, aminoalcohols, epoxides, epoxy alcohols, epoxy amines, diacid halides, dichloroformates and diisocyanates to form additional functionalized peroxides.Type: GrantFiled: June 6, 1995Date of Patent: March 18, 1997Assignee: Elf Atochem North America, Inc.Inventor: Daryl L. Stein
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Patent number: 5580951Abstract: Bischloroformate oligomer compositions are prepared by passing phosgene into a heterogeneous aqueous-organic mixture containing at least one dihydroxyaromatic compound, with simultaneous introduction of a base at a rate to maintain a specific pH range and to produce a specific volume ratio of aqueous to organic phase. By this method, it is possible to employ a minimum amount of phosgene. The reaction may be conducted batchwise or continuously. The bischloroformate composition may be employed for the preparation of cyclic polycarbonate oligomers or linear polycarbonate, and linear polycarbonate formation may be integrated with bischloroformate composition formation in a batch or continuous process.Type: GrantFiled: August 25, 1994Date of Patent: December 3, 1996Assignee: General Electric CompanyInventors: James M. Silva, Robert A. Pyles
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Patent number: 5545678Abstract: Amino-containing polymer systems which are suitable for the preparation of binders for printing inks can be obtained by synthesizing a polymer or polymer mixture A from at least one compound from each of the groups(a) epoxides, carbonates, epoxide-carbonates,(b) amines and(c) phenols,at least partial neutralization of the resulting polymer or polymer mixture A, and transfer to water, and optionally, preparing a water-insoluble polymer B which can be prepared by polymerization of ethylenically unsaturated monomers in the presence of the polymer or polymer mixture A.Type: GrantFiled: November 2, 1994Date of Patent: August 13, 1996Assignee: Hoechst AktiengesellschaftInventors: Astrid Giencke, Uwe Neumann, Bernd Mergardt, Gerd Walz
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Patent number: 5521280Abstract: A composition of an absorbable polymer and a filler to increase the stiffness of the polymer is disclosed. The filler is a poly[succinimide], which is a bioabsorbable polymer that degrades into a nontoxic, simple amino acid. The composition can be melt processed to prepare medical and surgical devices, particularly those devices which are designed to penetrate bodily tissue or to withstand heavy loads. Typical surgical devices which can be made from the composition include surgical staples and ligating clips.Type: GrantFiled: February 14, 1995Date of Patent: May 28, 1996Assignee: Ethicon, Inc.Inventors: Eugene P. Reilly, Steven C. Arnold, Angelo G. Scopelianos
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Patent number: 5514764Abstract: Hyperbranched polyester and polyamide polymers are prepared by a one-step process of polymerizing a monomer of the formula A-R-B.sub.2 so that high molecular weight globular polymers having a multiplicity of a particular functional group on the outside surface are obtained.Type: GrantFiled: June 1, 1995Date of Patent: May 7, 1996Assignee: Cornell Research Foundation, Inc.Inventors: Jean M. J. Frechet, Craig J. Hawker, Kathryn Uhrich
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Patent number: 5508379Abstract: Polyester polymers having pendant carbamate groups are disclosed. The polymers are prepared by reacting:(a) reacting a hydroxyalkyl cyclic carbonate compound with a compound having at least one cyclic anhydride group to form a half-ester acid comprising a cyclic carbonate group,(b) reacting the cyclic carbonate group on the half-ester from step (a) with ammonia, ammonium hydroxide, or a primary amine to ring open the cyclic carbonate and form a compound comprising an acid group, a hydroxyl group, and a pendant carbamate group, and(c) reacting a mixture comprising the compound from step (b) and optionally comprising a polyol or a polyacid or both to form the polyester having pendant carbamate groups.Type: GrantFiled: December 21, 1994Date of Patent: April 16, 1996Assignee: BASF CorporationInventors: Gregory L. Menovcik, Walter H. Ohrbom
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Patent number: 5494997Abstract: A process for preparing a polyestercarbonate copolymer which is nearly devoid of diaryl-carbonates and that exhibits a glass transition temperature lower than bisphenol-A carbonate homopolymer, and that shows improved processability is herein described. The desired lower Tg and improved flow can be achieved by the polycondensation of a dihydric phenol and aliphatic dicarboxylic acid. The condensate is polymerized with a carbonate forming reagent.Type: GrantFiled: August 1, 1994Date of Patent: February 27, 1996Assignee: General Electric CompanyInventors: Luca P. Fontana, Paul W. Buckley, Eugene Boden
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Patent number: 5488089Abstract: A curable resin composition, which is not thickened nor gels during storage, can be high solids, cures even at low temperatures and is excellent in electrostatic coating properties, and which contains as main components, a polymer having in one molecule epoxy group(s), and functional group(s) in each of which a carbonate ester group (--O--CO--O--) is directly bound to an aromatic ring; or a mixture of a compound having in one molecule at least two epoxy groups and a compound having in one molecule at least two functional groups in each of which a carbonate ester group (--O--CO--O--) is directly bound to an aromatic ring, and a curing reaction catalyst.Type: GrantFiled: October 17, 1994Date of Patent: January 30, 1996Assignee: Kansai Paint Co., Ltd.Inventors: Koji Yamada, Motoshi Yabuta
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Patent number: 5486593Abstract: This invention relates to medical devices formed totally or in part from homopolymers or copolymers comprising recurring carbonate moieties.Type: GrantFiled: September 23, 1994Date of Patent: January 23, 1996Assignee: United States Surgical CorporationInventors: Regianld T. Tang, Frank Mares, William J. Boyle, Jr., Tin-Ho Chiu, Kundanbhai M. Patel
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Patent number: 5476974Abstract: Normally liquid, omega-hydrofluoroalkyl ether compounds (and selected mixtures thereof) have a saturated perfluoroaliphatic chain of carbon atoms interrupted by one or more ether oxygen atoms. The compounds can be prepared, e.g., by decarboxylation of the corresponding fluoroalkyl ether carboxylic acids and are useful, e.g., in cleaning and drying applications.Type: GrantFiled: May 20, 1994Date of Patent: December 19, 1995Assignee: Minnesota Mining and Manufacturing CompanyInventors: George G. I. Moore, Miguel A. Guerra
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Patent number: 5459226Abstract: The present invention is directed to a method for effecting the redistribution of polycarbonate and polycarbonate blends utilizing a tetraorganophosphonium carboxylate salt.Type: GrantFiled: July 27, 1994Date of Patent: October 17, 1995Assignee: General Electric CompanyInventors: Joseph A. King, Jr., Patrick J. McCloskey, David M. Dardaris
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Patent number: 5426173Abstract: A two-dimensional, rigid-rod polymer of the formula: ##STR1## wherein x, y and z each has a value of 5 to 40; wherein the sum of x, y and z is about 20 to 100; and wherein PBX is a repeating group of the formula: ##STR2## is prepared by the polycondensation of trimeric acid (TMA) ##STR3## with 4-[5-amino-6-hydroxybenzoxazol-2-yl]benzoic acid (ABA) ##STR4## in polyphosphoric acid (PPA).Type: GrantFiled: July 18, 1994Date of Patent: June 20, 1995Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: My Dotrong, Minhhoa Dotrong, Robert C. Evers
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Patent number: 5412068Abstract: This invention relates to medical devices formed totally or in part from homopolymers or copolymers comprising recurring carbonate moieties.Type: GrantFiled: September 6, 1994Date of Patent: May 2, 1995Assignee: United States Surgical CorporationInventors: Reginald T.-H. Tang, Frank Mares, William J. Boyle, Jr., Tin-Ho Chiu, Kundanbhai M. Patel
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Patent number: 5399658Abstract: A gamma radiation-resistant polycarbonate-disulfide resin is disclosed. The incorporation of disulfide linkages in the structure of polycarbonate was found to enhance the resistance of the resin to the discoloration caused by exposure to gamma radiation. Accordingly, processes for the incorporation of disulfide linkages in the molecular backbone, as end-groups or as side chains are disclosed. The polycarbonate-disulfide resin may be used as a molding resin in the context of thermoplastic molding compositions as well as a stabilizing additive in polycarbonate resin.Type: GrantFiled: October 29, 1993Date of Patent: March 21, 1995Assignee: Miles Inc.Inventors: Rick L. Archey, Robert J. Kumpf, Aaron D. Meltzer, Harald Pielartzik
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Patent number: 5393855Abstract: A thermosetting resin composition which comprises (A-2) a vinyl polymer having at least one each of 2-oxo-1,3-dioxolan-4-yl group and a carboxyl group together on the polymer and a catalyst (B) effective for ring-opening the 2-oxo-1,3-dioxolan-4-yl group and curing said vinyl polymer, and related resin compositions.Type: GrantFiled: June 23, 1994Date of Patent: February 28, 1995Assignee: Dainippon Ink and Chemicals, Inc.Inventors: Goro Iwamura, Hiroshi Kinoshita, Asako Kometani
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Patent number: 5374699Abstract: A thermosetting resin composition which comprises (A-2) a vinyl polymer having at least one each of 2-oxo-1,3-dioxolan-4-yl group and a carboxyl group together on the polymer and a catalyst (B) effective for ring-opening the 2-oxo-1,3-dioxolan-4-yl group and curing said vinyl polymer, and related resin compositions.Type: GrantFiled: February 7, 1994Date of Patent: December 20, 1994Assignee: Dainipponink and Chemicals, Inc.Inventors: Goro Iwamura, Hiroshi Kinoshita, Asako Kometani
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Patent number: 5362841Abstract: A process for preparing halogenated polycarbonate wherein the total amount of base the end pH of the aqueous phaser and the amount of coupling catalyst employed in the reaction are controlled to selected levels.Type: GrantFiled: May 17, 1993Date of Patent: November 8, 1994Assignee: The Dow Chemical CompanyInventors: Sarat Munjal, Clark J. Cummings, Che-I Kao
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Patent number: 5360889Abstract: A soft polycarbonate resin represented by formula (I): ##STR1## wherein A represents a polyether block consisting essentially of a structural unit represented by formula (II):--CH.sub.2 --CH.sub.2 --CH.sub.2 --CH.sub.2 --O-- (II)and a structural unit represented by formula (III): ##STR2## wherein one of R.sub.1 and R.sub.2 represents a hydrogen atom and the other represents a methyl group;B represents a carbonate oligomer block represented by formula (IV): ##STR3## wherein X represents at least one linking group selected from ##STR4## --O--, --S--, --SO.sub.2 --, --SO--, and ##STR5## R.sub.3 and R.sub.4 each represents at least one of a hydrogen atom and a hydrocarbon group containing from 1 to 6 carbon atoms; Y.sub.1 and Y.sub.Type: GrantFiled: August 18, 1993Date of Patent: November 1, 1994Assignee: Hodogaya Chemical Co., Ltd.Inventors: Haruo Watanabe, Tsuyoshi Sato
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Patent number: 5354840Abstract: Functional-amine polyesters have at least a first residue of a first monomer, a second residue of a second monomer and from about 0.1 to about 3.0 mole percent of a functional-amine residue of a functional amine prepared by reacting the first and second monomers and the functional amine in an inert atmosphere. The functional amine has a functional group which facilitates polymerizing the amine and the first and second monomers. The amine residue facilitates reaction of the functional-amine polyester in an organic peroxide cross-linking reaction system.Type: GrantFiled: September 10, 1993Date of Patent: October 11, 1994Assignee: Xerox CorporationInventor: Peter G. Odell
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Patent number: 5349042Abstract: There is disclosed a process for producing a polycarbonate which comprises reacting, by the melt method, (A) a dihydroxy compound with (B) a carbonic diester having a chloride contempt derived from chloroformate group of not more than a prescribed level. According to the above process, a polycarbonate which is excellent in transparency, tone of color, heat resistance and water resistance can be efficiently and economically produced.Type: GrantFiled: March 16, 1993Date of Patent: September 20, 1994Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Shigeki Kuze, Ryozo Okumura, Yoshinobu Suwabe
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Patent number: 5340889Abstract: Liquid hydroxyurethane products having cyclocarbonate end groups are prepared by reacting a molar excess of a bis-carbonate of a bis-glycidyl ether of neopentyl glycol or 1,4-cyclohexanedimethanol with a polyoxyalkylenediamine such as a polyoxypropylenediamine. These products are useful for the preparation of polyurethanes, polyurethane polyols, polyester polyurethane polyols, and polycarbonate polyurethane polyols.Type: GrantFiled: July 19, 1993Date of Patent: August 23, 1994Assignee: Texaco Chemical CompanyInventors: Wheeler C. Crawford, Edward T. Marquis, Howard P. Klein
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Patent number: 5322907Abstract: The invention relates to the use of polyglycidyl compounds as hardeners in powder coating compositions based on polyester resins which react with epoxy groups, which compounds are polyglycidyl esters of formula (I) or (II) ##STR1## wherein in formula (I) R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each independently of one another hydrogen, C.sub.1 -C.sub.4 alkyl or radicals of formula (III) ##STR2## wherein A is a polymethylene group of 2 to 4 carbon atoms, and R.sub.5 and R.sub.6 are each independently of each other hydrogen, C.sub.1 -C.sub.4 alkyl or radicals of formula (III) or, when taken together, are an unsubstituted or a C.sub.1 -C.sub.4 alkyl-substituted methylene or polymethylene group of 2 to 7 carbon atoms, but with the proviso that at least two of the substituents R.sub.1 to R.sub.6 are radicals of formula (III),and, in formula (II)n is an integer from 2 to 6,R.sub.Type: GrantFiled: March 25, 1992Date of Patent: June 21, 1994Assignee: Ciba-Geigy CorporationInventors: Jacques-Alain Cotting, Philippe Gottis
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Patent number: 5322919Abstract: A process for producing polycarbonates which comprises transesterifying by reacting (A) at least one compound selected from the group consisting of aromatic dihydroxy compounds, aliphatic dihydroxy compounds, bisesters of aromatic dihydroxy compounds, bisesters of aliphatic dihydroxy compounds, carbonates of aromatic dihydroxy compounds and carbonates of aliphatic dihydroxy compounds, with (B) at least one compound selected from the group of diaryl carbonates, dialkyl carbonates, and alkylaryl carbonates, at a transesterification temperature of 100.degree. C. to 330.degree. C. in the presence of an inert solvent in an amount of 1 to 60% by weight based on the total of the theoretical amount of polycarbonate produced from the said compounds (A) and (B) and the amount of the inert solvent. According to the present invention, a polycarbonate which is excellent in color tone (transparency), heat resistance, and water resistance can be efficiently and simply produced at a low cost.Type: GrantFiled: November 20, 1991Date of Patent: June 21, 1994Assignee: Idemitsu Petrochemical Co., Ltd.Inventors: Kouichi Kurosawa, Shigeki Kuze, Noriyuki Kunishi, Masaya Okamoto
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Patent number: 5321112Abstract: The invention provides hydroxy-functional cyanoacrylate ultraviolet radiation absorbing compounds. The radiation absorbing compounds can be incorporated into step growth polymers such as polyurethanes, polyesters, and polycarbonates. The invention also provides such polymers having the radiation compound incorporated therein and articles prepared therefrom.Type: GrantFiled: December 22, 1992Date of Patent: June 14, 1994Assignee: Minnesota Mining and Manufacturing CompanyInventor: David B. Olson
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Patent number: 5308877Abstract: Organic resins with high surface areas and porosities, which are insoluble in organic solvents and contain few or no flexible groups in the resin structure, are disclosed. Also disclosed is a process for making such resins from polyfunctional aryl alkali metal compounds and a second polyfunctional monomer. Such resins are useful as absorbants.Type: GrantFiled: November 16, 1990Date of Patent: May 3, 1994Assignee: E. I. Du Pont de Nemours and CompanyInventors: Bruce E. Smart, Owen W. Webster
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Patent number: 5304628Abstract: A radiation-curing resin composition comprising (A) a resin having a carboxylic acid group and an unsaturated double bond and (B) a compound containing a cyclocarbonate group. The composition is excellent in stability and curing properties and provides a cured film excellent in water resistance, solvent resistance, chemical resistance, and heat resistance.Type: GrantFiled: August 4, 1992Date of Patent: April 19, 1994Assignee: Dainippon Ink and Chemicals, Inc.Inventors: Masashi Kinoshita, Hidenobu Ishikawa
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Patent number: 5300393Abstract: A process for the preparation of photoconductive imaging members which comprises coating a supporting substrate with a photogenerator layer comprised of photogenerating pigments and a mixture of cyclic oligomers wherein said mixture is heated to obtain a polycarbonate resin binder, and subsequently applying to the photogenerating layer a layer of charge transport molecules.Type: GrantFiled: August 14, 1992Date of Patent: April 5, 1994Assignee: Xerox CorporationInventors: Peter G. Odell, Trevor I. Martin, James D. Mayo
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Patent number: 5300589Abstract: Substituted triphenyl compounds endowed with chain extension activity for formulations such as polyurethanes are disclosed, and which have the general formula: ##STR1## wherein n is 0-1000; R.sub.1 .dbd.R.sub.2, and R.sub.1 and R.sub.2 are from the group --CH.sub.2 --CH.sub.2, --CH.sub.2 --C(CH.sub.3)H--; and --C(CH.sub.3)H--CH.sub.2 --.Type: GrantFiled: May 28, 1993Date of Patent: April 5, 1994Assignee: Hoechst Celanese CorporationInventors: Michael T. Sheehan, James R. Sounik, William W. Wilkison, III
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Patent number: 5288841Abstract: An improved process for the ring-opening polymerization of ring-opening polymerizable cyclic compounds using a fluidized bed.Type: GrantFiled: November 30, 1992Date of Patent: February 22, 1994Assignee: E. I. Du Pont de Nemours and CompanyInventors: Howard E. Bellis, Donald C. Paul
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Patent number: 5286837Abstract: Process for treating poly(esteramides) to improve the heat and storage stability thereof. Polymer is optionally suspended in a liquid medium, treated with an amide group-containing solvent, and then separated from the solvent and liquid medium (if any). Also, poly(esteramides) treated in this process and devices and articles comprising such poly(esteramides).Type: GrantFiled: December 8, 1992Date of Patent: February 15, 1994Assignee: Minnesota Mining and Manufacturing CompanyInventors: Thomas H. Barrows, Myhanh T. Truong, Paul R. Suszko, David W. Stegink
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Patent number: 5276134Abstract: A process for the preparation of an aromatic carbonate or polycarbonate from a phenol or bisphenol, methanol, carbon monoxide and oxygen comprising the steps of 1) reacting phenol or bisphenol with acetic anhydride to form (bis)phenyl acetate; 2) reacting dimethyl carbonate with (bis)phenyl acetate from step 1 to produce a phenyl carbonate or polycarbonate and methyl acetate; and 3) reacting the methyl acetate with carbon monoxide to produce acetic anhydride for use in step 1. In a desirable embodiment the dimethyl carbonate may also be prepared by reaction of methanol, carbon monoxide and oxygen.Type: GrantFiled: September 4, 1990Date of Patent: January 4, 1994Assignee: The Dow Chemical CompanyInventors: Hendrik E. Tuinstra, Cynthia L. Rand
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Patent number: 5274074Abstract: This invention relates to medical devices formed totally or in part from homopolymers or copolymers comprising recurring carbonate moieties.Type: GrantFiled: July 22, 1992Date of Patent: December 28, 1993Assignee: United States Surgical CorporationInventors: Reginald T. Tang, Frank Mares, William J. Boyle, Jr., Tin-Ho Chiu, Kundanbhai M. Patel
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Patent number: 5264548Abstract: A cyclic polycarbonate oligomer having a low melting point useful in the preparation of high molecular weight resins. The cyclic polycarbonate oligomers have structural units with long alkyl chains which may contain ester substituents.Type: GrantFiled: January 27, 1992Date of Patent: November 23, 1993Assignee: General Electric CompanyInventors: Daniel J. Brunelle, Thomas G. Shannon
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Patent number: 5256764Abstract: This invention relates to medical devices formed totally or in part from homopolymers or copolymers comprising recurring carbonate moieties.Type: GrantFiled: July 22, 1992Date of Patent: October 26, 1993Assignee: United States Surgical CorporationInventors: Reginald T. Tang, Frank Mares, William J. Boyle, Jr., Tin-Ho Chiu, Kundanbhai M. Patel
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Patent number: 5252701Abstract: A copolymer comprising a bioabsorbable, segmented molecular architecture has been invented. The copolymer has at least two different ester linkages. The segmented molecular architecture comprises a plurality of fast transesterifying linkages. The fast transesterifying linkages have a segment length distribution of greater than 1.3. The segmented molecular architecture also comprises a plurality of slow transesterifying linkages. The following proviso is a material limitation to this invention: for the fast transesterifying linkages consisting essentially of glycolate linkages and the slow transesterifying linkages selected from the group consisting of trimethylene carbonate and caproate linkages, the segment length distribution of the fast transesterifying linkages is up to 2.0 and the number average segment length of the slow transesterifying linkages is greater than 2.5 linkages per segment.Type: GrantFiled: July 6, 1990Date of Patent: October 12, 1993Assignee: American Cyanamid CompanyInventors: Peter K. Jarrett, Louis Rosati, Donald J. Casey
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Patent number: 5239042Abstract: There are disclosed dibenzofuran amorphous polymer comprising a recurring unit represented by following formula (II) and having a molecular weight giving a reduced viscosity of at least 0.2 dl/g as measured in the form of a 0.5% (W/V) solution in N-methyl-pyrrolidone at 25.degree. C., a process for producing said amorphous polymer, a dibenzofuran copolymer comprising, in addition to a recurring unit represented by following formula (II), at least one type of recurring unit represented by following general formula (III) in a specific proportion and having a molecular weight giving a reduced viscosity of at least 0.2 dl/g as measured in the form of a 0.5% (W/V) solution in concentrated sulfuric acid at 25.degree. C., and a process for producing said copolymer. ##STR1## wherein A is --O--, --CO--, --S--, --SO.sub.2 --, a divalent alkylene group or a single bond and n is a number of 0, 1 or 2.Type: GrantFiled: November 15, 1991Date of Patent: August 24, 1993Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Isaburo Fukawa, Tsuneaki Tanabe
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Patent number: 5212281Abstract: A process for preparing halogenated polycarbonate wherein the total amount of base, the end pH of the aqueous phase, and the amount of coupling catalyst employed in the reaction are controlled to selected levels.Type: GrantFiled: August 8, 1991Date of Patent: May 18, 1993Assignee: The Dow Chemical CompanyInventors: Sarat Munjal, Clark J. Cummings, Che-I Kao
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Patent number: RE35499Abstract: A polycarbonate composition, and process for making same, wherein the monocarbonate and dicarbonate content is eliminated or limited to negligibly low levels by withholding introduction of chain terminator to the reaction mixture until the reaction of dihydroxy and carbonic acid derivative starting materials has run substantially to completion.Type: GrantFiled: May 17, 1993Date of Patent: April 29, 1997Assignee: The Dow Chemical CompanyInventors: Sarat Munjal, Che I. Kao