Mixed With Carboxylic Acid Or Derivative Or Polymer Derived Therefrom Patents (Class 525/408)
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Patent number: 5663219Abstract: The peel strength of lightweight, liquid polysulfide-based sealants for aircraft is improved by the addition of an epoxy-terminated liquid polysulfide to the liquid polysulfide. The lightweight sealants have a specific gravity of from about 1 to about 1.3 and the amount of epoxide terminated polysulfide is from about 0.4 to about 5% of the weight of the polysulfide present in the sealant. Fillers having a specific gravity of from about 0.1 to about 2.2 are used.Type: GrantFiled: September 25, 1995Date of Patent: September 2, 1997Assignee: Morton International, Inc.Inventors: Kanu R. Chokshi, Keith B. Potts
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Patent number: 5663247Abstract: A hyperbranched macromolecule of polyester type comprising a central monomeric or polymeric nucleus and at least one generation of a branching chain extender having at least three reactive sites of which at least one is a hydroxyl or hydroxyalkyl substituted hydroxyl group and at least one is a carboxyl or terminal epoxide group. The nucleus is an epoxide compound having at least one reactive epoxide group. Optionally, the macromolecule comprises at least one generation consisting of at least one spacing chain extender having two reactive sites of which one is a hydroxyl or hydroxyalkyl substituted hydroxyl group and one is a carboxyl or terminal epoxide group. The macromolecule may be terminated by means of at least one chain stopper.Type: GrantFiled: October 24, 1995Date of Patent: September 2, 1997Assignee: Perstorp ABInventors: Kent Sorensen, Bo Pettersson
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Patent number: 5650234Abstract: Several poly(ethylene glycol) mixed carbonates and their preparation are closed. These carbonates are synthesized by conversion of polyethylene glycol first to the chloroformate then by reaction with the hydroxyl group of N-hydroxybenzotriazole or 2-hydroxypyrimidine or N-hydroxy-2-pyrrolidinone. These mixed carbonate analogs smoothly react with amino groups in aminoglycans and protein and amino containing surfaces to form stable, hydrolysis resistant carbamate linkages.Type: GrantFiled: September 9, 1994Date of Patent: July 22, 1997Assignee: Surface Engineering Technologies, Division of InnerDyne, Inc.Inventors: Eric Kurt Dolence, Chen-Ze Hu, Ray Tsang, Clifton G. Sanders, Shigemasa Osaki
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Patent number: 5639851Abstract: Absorbable, segmented copolymers of aliphatic polyesters based on lactone monomers lactide, and p-dioxanone are described. The segmented copolymers exhibit a broad range of properties, especially high strength and long elongations. This unique elastomeric behavior makes the copolymers of the present invention useful in a variety of medical device applications, especially adhesion prevention barriers and hemostatic devices.Type: GrantFiled: October 2, 1995Date of Patent: June 17, 1997Assignee: Ethicon, Inc.Inventors: Rao S. Bezwada, Kevin Cooper
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Patent number: 5633343Abstract: Absorbable, segmented copolymers of aliphatic polyesters based on lactone monomers glycolide, and p-dioxanone are described. The segmented copolymers exhibit a broad range of properties, especially high strength and stiffness, and fast absorption rates and breaking strength retention (BSR) profiles, useful in a variety of medical devices. Most importantly, for suture applications where Vicryl.RTM.-like polyglcolide-polylactide sutures with excellent tensile properties, but shorter BSR profiles than Vicryl.RTM. are needed. The copolymers of the present invention have such properties, making them useful in plastic surgery where faster absorption times would lead to less tissue scarring.Type: GrantFiled: June 30, 1995Date of Patent: May 27, 1997Assignee: Ethicon, Inc.Inventors: Rao S. Bezwada, Kevin Cooper, Dennis D. Jamiolkowski, Hugh D. Newman, Jr.
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Patent number: 5626863Abstract: Hydrogels of polymerized and crosslinked macromers comprising hydrophilic oligomers having biodegradable monomeric or oligomeric extensions, which biodegradable extensions are terminated on free ends with end cap monomers or oligomers capable of polymerization and cross linking are described. The hydrophilic core itself may be degradable, thus combining the core and extension functions. Macromers are polymerized using free radical initiators under the influence of long wavelength ultraviolet light, visible light excitation or thermal energy. Biodegradation occurs at the linkages within the extension oligomers and results in fragments which are non-toxic and easily removed from the body. Preferred applications for the hydrogels include prevention of adhesion formation after surgical procedures, controlled release of drugs and other bioactive species, temporary protection or separation of tissue surfaces, adhering of sealing tissues together, and preventing the attachment of cells to tissue surfaces.Type: GrantFiled: January 27, 1995Date of Patent: May 6, 1997Assignee: Board of Regents, The University of Texas SystemInventors: Jeffrey A. Hubbell, Chandrashekhar P. Pathak, Amarpreet S. Sawhney, Neil P. Desai, Jennifer L. Hill
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Patent number: 5621050Abstract: This invention relates to materials for medical or veterinary use that possess considerably improved properties with regard to friction. The invention also relates to the production of such materials from existing materials that possess suitable bulk properties, but inappropriate frictional properties. This invention also relates to a hydrophilic coating material that provides improved frictional properties.Type: GrantFiled: June 7, 1995Date of Patent: April 15, 1997Assignee: American Cyanamid CompanyInventors: Peter K. Jarrett, George Jessup, Louis Rosati, Chris Martin, John W. Maney
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Patent number: 5618911Abstract: A polymer having a blocked terminal group according to the present invention, represented by the following Formula (I): ##STR1## where R is an alkylene group containing 1 to 20 carbon atoms; X.sub.1 is an acyl group containing 2 to 50 carbon atoms; Y is H, an alkyl group containing 1 to 50 carbon atoms or an alkenyl group containing 1 to 50 carbon atoms; m is a positive integer; and n.sub.1 is 0 or a positive integer.Type: GrantFiled: August 3, 1994Date of Patent: April 8, 1997Assignee: Toyo Boseki Kabushiki KaishaInventors: Kunio Kimura, Takeshi Ito, Tomohiro Aoyama, Keiichi Uno, Kiyoshi Hotta, Minako Arichi
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Patent number: 5618313Abstract: Absorbable copolymers are fabricated from a predominant component of dioxanone randomly copolymerized with minor amounts of other bioabsorbable monomers. The copolymers are useful in forming surgical articles, including both monofilament and multifilament sutures.Type: GrantFiled: October 11, 1994Date of Patent: April 8, 1997Assignee: United States Surgical CorporationInventors: Mark S. Roby, Donald S. Kaplan, Cheng-Kung Liu, Steven L. Bennett
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Patent number: 5614578Abstract: A dosage form is disclosed comprising an injection-molded housing member free of organic solvents.Type: GrantFiled: October 28, 1994Date of Patent: March 25, 1997Assignee: Alza CorporationInventors: Liang C. Dong, Patrick S. L. Wong, Crystal Pollock, Vincent J. Ferrari
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Patent number: 5605975Abstract: The invention disclosed relates to novel branched chain hydroxy terminated aliphatic azido polymers and copolymers, and to a single step process for their production. The properties of the materials are preferably adjusted through the incorporation of suitable polyols which can provide additional branching of the materials.Type: GrantFiled: August 28, 1995Date of Patent: February 25, 1997Assignee: Her Majesty the Queen in right of Canada, as represented by the Minister of National DefenceInventor: Elie Ahad
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Patent number: 5605976Abstract: The present invention is directed to methods of preparing high purity polyalkylene oxide carboxylic acids. The methods include reacting a polyalkylene oxide such as polyethylene glycol with a t-butyl haloacetate in the presence of a base followed by treatment with an acid such as trifluoroacetic acid. The resultant polymer carboxylic acids are of sufficient purity so that expensive and time consuming purification steps required for pharmaceutical grade polymers are avoided.Type: GrantFiled: May 15, 1995Date of Patent: February 25, 1997Assignee: Enzon, Inc.Inventors: Anthony J. Martinez, Richard B. Greenwald
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Patent number: 5583187Abstract: Hot melt adhesive compositions, particularly biodegradable hot melt adhesives are prepared from 10 to 90% by weight of a thermoplastic methylol polyester prepared from the reaction of at least one dicarboxylic acid with a diglycidyl ether, a diglycidyl ester or a combination thereof; 0 to 90% by weight of a compatible tackifier; 0 to 80% by weight of a compatible plasticizer; 0 to 50% by weight of a compatible wax diluent and 0 to 3% by weight of a stabilizer.Type: GrantFiled: May 3, 1995Date of Patent: December 10, 1996Assignee: National Starch and Chemical Investment Holding CorporationInventors: Matthew L. Sharak, Charles W. Paul, Dilip Ray-Chaudhuri
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Patent number: 5578662Abstract: Star polymers of soft segment forming monomers are useful in forming surgical devices. The star polymers can be endcapped with isocyanate, mixed with a filler and/or cross-linked. The polymer compositions are useful, for example, as fiber coatings, surgical adhesives or bone putty, or tissue growth substrate.Type: GrantFiled: June 7, 1995Date of Patent: November 26, 1996Assignee: United States Surgical CorporationInventors: Steven L. Bennett, Ying Jiang, Elliott A. Gruskin, Kevin M. Connolly
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Patent number: 5576418Abstract: The invention relates to the use of copolymers of racemic lactide and .epsilon.-caprolactone, .delta.-valerolactone, gamma-decalactone or .beta.-hydroxybutyric acid, prepared by the reaction of the monomers in the molar ratio of lactide to reaction partner of approximately 95-70 to 5-30, with the addition of metal carboxylates, known per se, as initiators at temperatures of approximately 150.degree. C. over a period of time of approximately 16 to 18 hours, for the topical treatment of human or animal skin.Type: GrantFiled: July 10, 1995Date of Patent: November 19, 1996Inventor: Christian Jurgens
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Patent number: 5574129Abstract: A process for producing polylactic acid includes the steps of polycondensing lactic acid to a lactic acid prepolymer having a weight-average molecular weight of 10,000-50,000 in a batch-type polymerization reactor, and polycondensing the lactic acid prepolymer to lactic acid polymer having a weight-average molecular weight of at least 100,000 by means of a screw-type extruder.Type: GrantFiled: May 5, 1995Date of Patent: November 12, 1996Assignee: The Japan Steel Works, Ltd.Inventors: Rika Miyoshi, Tadamoto Sakai, Noriaki Hashimoto, Yukihiro Sumihiro, Kayoko Yokota, Kunihiko Koyanagi
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Patent number: 5567435Abstract: Hydrogels of polymerized and crosslinked macromers comprising hydrophilic oligomers having biodegradable monomeric or oligomeric extensions, which biodegradable extensions are terminated on free ends with end cap monomers or oligomers capable of polymerization and cross linking are described. The hydrophilic core itself may be degradable, thus combining the core and extension functions. Macromers are polymerized using free radical initiators under the influence of long wavelength ultraviolet light, visible light excitation or thermal energy. Biodegradation occurs at the linkages within the extension oligomers and results in fragments which are non-toxic and easily removed from the body. Preferred applications for the hydrogels include prevention of adhesion formation after surgical procedures, controlled release of drugs and other bioactive species, temporary protection or separation of tissue surfaces, adhering of sealing tissues together, and preventing the attachment of cells to tissue surfaces.Type: GrantFiled: June 6, 1995Date of Patent: October 22, 1996Assignee: Board of Regents, The University of Texas SystemInventors: Jeffrey A. Hubbell, Chandrashekhar P. Pathak, Amarpreet S. Sawhney, Neil P. Desai, Jennifer L. Hill-West
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Patent number: 5560904Abstract: Use of a glyceryl tri(.alpha.-hydroxyacylate) in a cosmetic and/or dermatological composition as the sole precursor of glycerol and of hydroxy acid, which is capable of releasing the glycerol and the hydroxy acid onto the skin via an enzymatic reaction, in order to moisturize and soften the skin. Useful especially for moisturizing and/or treating dry skin.Type: GrantFiled: April 13, 1995Date of Patent: October 1, 1996Assignee: L'OrealInventors: Jean-Pierre Laugier, Jean-Francois Nadaud
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Patent number: 5550190Abstract: The composition of the present invention is a thermoplastic elastomer composition obtained by dynamically crosslinking (A) 51-95% by weight of a thermoplastic polyester elastomer and (B) 49-5% by weight of a rubber during kneading. The composition is excellent in all of hardness, tensile strength, tensile elongation, compression set, thermal aging resistance, oil resistance and molded product appearance, and is suitably used as a material for automobile parts such as joint boot and the like.Type: GrantFiled: March 27, 1992Date of Patent: August 27, 1996Assignees: Japan Synthetic Rubber Co., Ltd., NTN CorporationInventors: Ko Hasegawa, Toshio Teramoto, Tatsuo Nakajima, Takeyoshi Konomoto
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Patent number: 5548035Abstract: This invention concerns the thermoplastic, biodegradable and nontoxic block copolymer which is easily degraded and excreted in human body by the hydrolysis of intramolecular ester and amide bond. The structure of present copolymer comprises i) hydrophilic and swellable soft domain consisting of polyethyleneoxide(PEO), and ii) hydrophobic, biodegradable, crystallizable and non-swellable hard domain consisting of polylactide(PLA), polyglycolide(PGA), polylactideglycolide(PLdA) and polycaprolactone(PCL).Type: GrantFiled: May 4, 1994Date of Patent: August 20, 1996Assignee: Sam Yang Co., Ltd.Inventors: Ho H. Kim, Guw D. Yeo, Yil W. Yi
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Patent number: 5539064Abstract: A resist ink composition developable with a diluted, alkaline solution, which exhibits high dispersion stability itself, can form a pattern with excellent resolution, even in the case of a low exposure amount, and can produce a cured resist film excellent in solvent resistance for high-performance printed circuits and which comprises an ultraviolet-curable resin obtained by copolymerizing (a) from 5 to 50% by weight of an ethylenically unsaturated monomer of a general formula: ##STR1## wherein R.sub.1 represents a hydrogen atom or a methyl group; R.sub.2 represents a hydrogen atom or an alkyl group; n represent an integer of from 1 to 4, and/or glycerol mono(meth)acrylate, (b) from 10 to 90% by weight or glycidyl (meth)acrylate and (c) from 0 to 80% by weight of other ethylenically unsaturated monomers capable of copolymerizing with these (a) and (b), followed by reacting the resulting copolymer with from 0.7 to 1.Type: GrantFiled: September 12, 1995Date of Patent: July 23, 1996Assignee: Goo Chemical Industries Co., Ltd.Inventors: Soichi Hashimoto, Satoshi Miyayama, Toshiaki Nishimura, Toshikazu Oda
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Patent number: 5534598Abstract: Low-molecular-weight, hydroxy-functional acrylate resins are disclosed. The resins are copolymers derived from an allylic alcohol or a propoxylated allylic alcohol, an acrylate or methacrylate monomer, and optionally, one or more additional ethylenic monomers. The resins are uniquely prepared without a chain-transfer agent or reaction solvent, and are useful in many thermoset polymer applications, including thermoset polyesters, polyurethanes, crosslinked polymeric resins, melamines, alkyds, uralkyds, and epoxy thermosets.Type: GrantFiled: June 6, 1995Date of Patent: July 9, 1996Assignee: ARCO Chemical Technology, L.P.Inventor: Shao-Hua Guo
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Patent number: 5530074Abstract: This invention relates to materials for medical or veterinary use that possess considerably improved properties with regard to friction. The invention also relates to the production of such materials from existing materials that possess suitable bulk properties, but inappropriate frictional properties. This invention also relates to a hydrophilic coating material that provides improved frictional properties.Type: GrantFiled: June 7, 1995Date of Patent: June 25, 1996Assignee: American Cyanamid CompanyInventors: Peter K. Jarrett, George Jessup, Louis Rosati, Chris Martin, John W. Maney
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Patent number: 5525664Abstract: A process for making wet strengthened paper comprises (1) treating an aqueous suspension of papermaking fibers with a composition comprising (a) a cationic polymer that cures at a neutral pH and is capable by itself of conferring wet strength to paper, the resin having a multiplicity of 3-hydroxyazetidinium ion groups along the polymer chain, and (b) a water-soluble carboxyalkylated polyamine polymer or a carboxylic acid salt thereof.Type: GrantFiled: December 2, 1994Date of Patent: June 11, 1996Assignee: Hercules IncorporatedInventors: Andrew J. Miller, Brian M. Stubbs
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Patent number: 5525671Abstract: A process for continuously producing a linear lactide copolymer having a weight-average molecular weight of from 20,000 to 400,000 using a continuous reaction apparatus composed of three or more stirred flow reactors connected in series, which process comprises the steps of continuously feeding from 50 to 98 parts by weight of a lactide and from 2 to 50 parts by weight of a polymer having a hydroxyl group in a molten state or as dissolved in a solvent to the first reactor of said continuous reaction apparatus, and transferring the reaction mixture from said first reactor to the following reactors successively while maintaining the reaction pressure and the reaction temperature in every reactor in the range of from 1 to 5 atm. and of from 140.degree. to 210.degree. C., respectively, to conduct ring opening copolymerization. According to the process of the present invention, the production problems associated with conventional continuous production methods for lactide copolymers, i.e.Type: GrantFiled: December 27, 1994Date of Patent: June 11, 1996Assignee: Dainippon Ink and Chemicals, Inc.Inventors: Hiroshi Ebato, Shoji Imamura
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Patent number: 5522841Abstract: Block copolymers have one of the block made from hard phase forming monomers and another block made from soft phase forming monomers copolymerized with randomly intermingled units of other soft phase forming monomers. Particularly useful copolymers are initiated with a polyalkylene oxide initiator. The copolymers are useful in forming surgical articles, including both monofilament and multifilament sutures.Type: GrantFiled: December 29, 1994Date of Patent: June 4, 1996Assignee: United States Surgical CorporationInventors: Mark S. Roby, Cheng-Kung Liu, Steven L. Bennett
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Patent number: 5508378Abstract: A method for producing a polylactic acid of the present invention includes the steps of (a) polymerizing a lactide used as a main starting material in a molten state to give a polylactic acid; and (b) further polymerizing the polylactic acid obtained in step (a) in a solid phase by heating at a temperature lower than a melting point of a final polymer product.Type: GrantFiled: January 20, 1995Date of Patent: April 16, 1996Assignee: Shimadzu CorporationInventors: Hitomi Ohara, Seiji Sawa, Tatsushi Kawamoto
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Patent number: 5506024Abstract: Water vapor permeable films of polymeric material of thermoplastic elastomer type based on polyetheresteramide, and preferably on polyether block amides and articles comprising a film of this kind and capable, in particular, of coming into contact with the human body.Type: GrantFiled: June 7, 1995Date of Patent: April 9, 1996Assignee: AtochemInventor: Joseph R. Flesher
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Patent number: 5506309Abstract: This invention pertains to perfluoropolyethers and perhalogenated chlorofluoropolyethers that can be prepared by fluorinating addition polymers made by polymerizing epoxides.Type: GrantFiled: June 6, 1995Date of Patent: April 9, 1996Assignee: Exfluor Research CorporationInventors: Thomas R. Bierschenk, Timothy Juhulke, Hajimu Kawa, Richard J. Lagow
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Patent number: 5502159Abstract: A block copolymer for use in the fabrication of bioabsorbable articles such as monofilament surgical sutures is prepared by copolymerizing one or more hard phase forming monomers and 1,4-dioxan-2-one, and then polymerizing one or more hard phase forming monomers with the dioxanone-containing copolymer.Type: GrantFiled: May 1, 1995Date of Patent: March 26, 1996Assignee: United States Surgical CorporationInventors: Cheng-Kung Liu, Steven L. Bennett, John Kennedy, Donald S. Kaplan, Ross R. Muth
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Patent number: 5496889Abstract: Thermoplastic polyblend compositions, well suited for the production of mechanically strong and chemical-resistant shaped articles having a wide variety of chemical engineering and other applications, e.g., for the production of electrical cable for high-frequency electrical transmissions, comprise (i) a fluoropolymer, (ii) an aromatic polyester and (iii) a copolymeric compatibilizing agent therefor, the compatibilizing copolymer (iii) comprising the copolymerizate of ethylene, a glycidyl acrylate, an acrylic comonomer and, optionally, a peroxy comonomer.Type: GrantFiled: June 5, 1995Date of Patent: March 5, 1996Assignee: Elf Atochem S.A.Inventors: Bruno Schlund, Alain Bouilloux
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Patent number: 5494977Abstract: Compositions(I), (II) and (III) comprising compounds having vinyl groups as side chains and epoxidized compositions(XI), (XII) and (XIII) thereof, which can be prepared by the various reaction combinations of (a) with (b) or (b)+(c), and or (d), where(a) is at least one compound having at least one vinyl group and one epoxy group in the molecule; (b) is at least one of a polybasic compound, an anhydride thereof, a polymer having carboxylic groups at terminals and a polymer having carboxylic groups as side chains; (c) is at least one organic compound having at least one active hydrogen atom; and (d) is at least one of an unsaturated monocarboxylic compound or an unsaturated monocarboxylic ester having a hydroxyl group.Type: GrantFiled: November 21, 1994Date of Patent: February 27, 1996Assignee: Daicel Chemical Industries, Ltd.Inventors: Yoshiyuki Harano, Sozo Namai, Katsuyki Maeda, Takaaki Murai
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Patent number: 5483008Abstract: The present invention relates to a bifunctional polyether having groups different from each other at both ends, with a polymerization degree of 5 to 10000 and consisting of repeating units each represented by the following formula (I): ##STR1## (wherein R.sub.1, represents a hydrogen atom, halogen atom, or a lower alkyl group optionally substituted by a halogen atom, and R.sub.1 in each repeating unit may be the same or different), as well as to a process for the preparation thereof and a polymerization initiator therefor. The process of production and polymerization initiator of the present invention enable 100% introduction of a primary amino group into one of the ends of polyether.Type: GrantFiled: February 5, 1993Date of Patent: January 9, 1996Assignee: Research Development Corporation of JapanInventors: Yasuhisa Sakurai, Teruo Okano, Masayuki Yokoyama, Kazunori Kataoka, Yukio Nagasaki, Nobuyuki Ohsako, Masao Kato
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Patent number: 5476909Abstract: The present invention relates to a triblock(ABA) copolymer used for medical application essentially consisting of: PLA, PGA, or PLA/PGA as hydrophobic block(A), biodegradable PEO derivatives synthesized by PEOs less than 4,000 molecular weight by the ester linkage among them as hydrophilic block (B). The present invention also provides a triblock copolymer easily degradable to the compounds less than M.W. 4,000 in order to excrete through the human kidney, which enables its medical application. Furthermore, using the triblock copolymer of the present invention, the improved hydrogel materials with broad biochemical applications can be provided due to its biodegradable and thermoplastic properties.Type: GrantFiled: February 7, 1994Date of Patent: December 19, 1995Assignee: Sam Yang Co., Ltd.Inventors: Gun P. Kim, Jin D. Song
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Patent number: 5466444Abstract: The invention relates to the use of copolymers of racemic lactide and .epsilon.-caprolactone, .delta.-valerolactone, gamma-decalactone or .beta.-hydroxybutyric acid, prepared by the reaction of the monomers in the molar ratio of lactide to reaction partner of approximately 95-70 to 5-30, with the addition of metal carboxylates, known per se, as initiators at temperatures of approximately 150.degree. C. over a period of time of approximately 16 to 18 hours, for the topical treatment of human or animal skin.Type: GrantFiled: June 29, 1992Date of Patent: November 14, 1995Inventor: Christian Jurgens
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Patent number: 5455308Abstract: Thermosettable composition suitable for the production of endless objects without the use of continuous carrier material, whereby the composition comprises an epoxy resin or an unsaturated polyester and a high molecular weight thermoplastic polymer which has a weight-average molecular weight of at least 1,000,000 g/mol in an amount to make the composition spinnable, the amount ranging from at least 0.1% where the polymer has a molecular weight of 5,000,000 g/mol or more or less than 2% where the polymer has the weight-average molecular weight of 1,000,000 g/mol, the amount decreasing as the weight-average molecular weight increases.Type: GrantFiled: August 16, 1994Date of Patent: October 3, 1995Assignee: DSM N.V.Inventor: Cornelis W. M. Bastiaansen
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Patent number: 5453468Abstract: The invention relates to two classes of prepolymers containing a perfluoropolyethereal chain and carboxylic end groups, suitable as cross-linking agents for epoxy prepolymers. The first class contains anhydride-derived end groups; the second lactone-derived end groups; prepolymers therefrom are also disclosed. Additional non-fluorinated curing agents may also be added.Type: GrantFiled: January 24, 1995Date of Patent: September 26, 1995Assignee: Ausimont S.p.A.Inventors: Leno Mascia, Claudio Tonelli, Giovanni Simeone
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Patent number: 5444124Abstract: Thermoplastic polyblend compositions, well suited for the production of mechanically strong and chemical-resistant shaped articles having a wide variety of chemical engineering and other applications, e.g., for the production of electrical cable for high-frequency electrical transmissions, comprise (i) a fluoropolymer, (ii) an aromatic polyester and (iii) a copolymeric compatibilizing agent therefor, the compatibilizing copolymer (iii) comprising the copolymerizate of ethylene, a glycidyl acrylate, an acrylic comonomer and, optionally, a peroxy comonomer.Type: GrantFiled: June 17, 1994Date of Patent: August 22, 1995Assignee: Elf Atochem S.A.Inventors: Bruno Schlund, Alain Bouilloux
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Patent number: 5442033Abstract: A copolymer of from in the range of from about 55 to about 70 weight percent lactide and from in the range of from about 45 to about 30 mole percent .epsilon.-caprolactone suitable for use in biomedical applications such as drug delivery, coatings for surgical sutures and needles, and lubricants for medical devices.Type: GrantFiled: November 14, 1994Date of Patent: August 15, 1995Assignee: Ethicon, Inc.Inventor: Rao S. Bezwada
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Patent number: 5442016Abstract: This invention relates to materials for medical or veterinary use that possess considerably improved properties with regard to friction. The invention also relates to the production of such materials from existing materials that possess suitable bulk properties, but inappropriate frictional properties. This invention also relates to a hydrophilic coating material that provides improved frictional properties.Type: GrantFiled: April 20, 1994Date of Patent: August 15, 1995Assignee: American Cyanamid CompanyInventors: Peter K. Jarrett, George Jessup, Louis Rosati, Chris Martin, John W. Maney
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Patent number: 5440007Abstract: High molecular weight, biodegradable polymers of substituted-poly(.beta.-propioesters), wherein the repeat unit sequences have a predominantly syndiotactic arrangement and a method of forming such polymers are disclosed. The method includes exposing a substituted-.beta.-propiolactone to a tin-based organometallic catalyst for a sufficient combination of time and temperature to form the predominantly syndiotactic substituted-poly(.beta.-propioester).Type: GrantFiled: April 25, 1994Date of Patent: August 8, 1995Assignee: University of Massachusetts LowellInventors: Richard A. Gross, John E. Kemnitzer, Stephen P. McCarthy
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Patent number: 5432233Abstract: The present invention provides a low viscosity curable resin composition and coating composition containing the same which has a decreased solvent content. The coating composition provides a cured film having not only excellent acid resistance but also good weather resistance and mar resistance without an adverse effect to the environment. The curable resin composition comprises (a) a hydroxyl and carboxyl group containing silicone polymer, (b) a carboxyl and carboxylate group containing polymer, and (c) a hydroxyl and epoxy group containing polymer.Type: GrantFiled: September 9, 1993Date of Patent: July 11, 1995Assignee: Nippon Paint Co., Ltd.Inventors: Seigo Miyazoe, Tsuneyoshi Hisai, Akira Fushimi, Kazuhiko Takeoka, Yoshitaka Okude, Takeo Kurauchi
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Patent number: 5423735Abstract: The present invention provides a water-curable resin composition for use in an orthopedic cast composed of a water-reactive alkoxysilane terminated resin, having at least one hydrolyzable group per molecule. The resin composition has a viscosity of no greater than about 500 Pa-s under ambient conditions and conditions less than about 1 wt-% of a solvent, based on the total weight of the resin composition.Type: GrantFiled: April 16, 1993Date of Patent: June 13, 1995Assignee: Minnesota Mining and Manufacturing CompanyInventors: Andrew Callinan, Matthew T. Scholz
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Patent number: 5419861Abstract: A method for improving the paintability of a shaped object of which at least the outer portion is made of a polyamide/polyolefin alloy, wherein an electrical discharge is made to act on a gas in order to create a cold plasma type reactive gas stream, and the shaped object is brought into contact with the reactive gas stream thereby produced and with an oxygen source in order to oxidize the surface of the shaped object. The method is particularly useful for treating trim for motor vehicles as well as items of garden furniture prior to painting.Type: GrantFiled: May 23, 1994Date of Patent: May 30, 1995Assignee: Elf Aquitaine ProductionInventor: Francis Verzaro
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Patent number: 5418299Abstract: Blends can be formed which comprise a flexible coil polymer substrate, e.g., of a poly(alkylene terephthalate), and a thermotropic, essentially liquid crystalline oligomer which comprises aromatic units and at least one linear polyalkylene spacer. These blends can be used to form fibers or molded articles.Type: GrantFiled: November 23, 1993Date of Patent: May 23, 1995Assignee: Akzo Nobel N.V.Inventors: Ki-Soo Kim, Sophia Dashevsky, Jian-Lin Liu, Stanley W. Palmaka
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Patent number: 5410016Abstract: Hydrogels of polymerized and crosslinked macromers comprising hydrophilic oligomers having biodegradable monomeric or oligomeric extensions, which biodegradable extensions are terminated on free ends with end cap monomers or oligomers capable of polymerization and cross linking are described. The hydrophilic core itself may be degradable, thus combining the core and extension functions. Macromers are polymerized using free radical initiators under the influence of long wavelength ultraviolet light, visible light excitation or thermal energy. Biodegradation occurs at the linkages within the extension oligomers and results in fragments which are non-toxic and easily removed from the body. Preferred applications for the hydrogels include prevention of adhesion formation after surgical procedures, controlled release of drugs and other bioactive species, temporary protection or separation of tissue surfaces, adhering of sealing tissues together, and preventing the attachment of cells to tissue surfaces.Type: GrantFiled: March 1, 1993Date of Patent: April 25, 1995Assignee: Board of Regents, The University of Texas SystemInventors: Jeffrey A. Hubbell, Chandrashekhar P. Pathak, Amarpreet S. Sawhney, Neil P. Desai, Jennifer L. Hill
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Patent number: 5408008Abstract: Hindered amine light stabilizers are provided in which the hindered amine is contained in a unit of formula ##STR1## where X is ##STR2## and R.sup.1, R.sup.2, R.sup.3, and A are as defined as in the Summary of the Invention. Unique polymeric and non-polymeric compounds containing this unit are useful as additives for the stabilization of polymeric compositions which are normally subject to thermal, oxidative or actinic light degradation.Type: GrantFiled: August 26, 1993Date of Patent: April 18, 1995Assignee: Elf Atochem North America, Inc.Inventor: Terry N. Myers
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Patent number: 5387651Abstract: Block copolyetheramide suitable for injection molding, consisting of polyamide blocks and polyalkylene ether blocks and having a melting point ranging from 215.degree. to 223.degree. C., an apparent viscosity, at 230.degree. C., ranging from 50 to 150 Pa, a number average molecular weight ranging from 10,000 to 50,000 and a yellow degree, measured by means of an Elrepho.RTM. apparatus, lower than or equal to 20. They are prepared by polymerizing the polyamide monomers in the presence of hypophosphorous acid or meta-hypophosphorous acid and then by polycondensing the polyamide with polyalkylene ether having hydroxyl end groups.Type: GrantFiled: July 15, 1993Date of Patent: February 7, 1995Assignee: Enichem S.p.A.Inventor: Aldemaro Ciaperoni
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Patent number: 5386005Abstract: The invention relates to two classes of prepolymers containing a perfluoropolyethereal chain and carboxylic end groups, suitable as cross-linking agents for epoxy prepolymers.The first class contains anhydride-derived end groups; the second lactone-derived end groups; prepolymers therefrom are also disclosed. Additional non-fluorinated curing agents may also be added.Type: GrantFiled: February 19, 1993Date of Patent: January 31, 1995Assignee: Ausimont S.p.A.Inventors: Leno Mascia, Claudio Tonelli, Giovanni Simeone
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Patent number: 5376712Abstract: An impact modified polyamide composition includes a polyamide continuous phase and a rubbery polymer component which is uniformly distributed throughout the polyamide continuous phase in the form of discrete particles, with the rubber polymer component having a flexible backbone and at least about 40 percent of the monomeric units forming the rubbery polymer having pendant polar groups. In accordance with a preferred aspect of the invention, the rubbery component contains a reinforcing filler which provides for an unexpected improvement in retention of flexural modulus.Type: GrantFiled: September 9, 1993Date of Patent: December 27, 1994Assignee: The University of AkronInventor: Nobuyuki Nakajima