With Ethylenic Reactant Patents (Class 525/59)
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Publication number: 20030032722Abstract: There is provided an acrylic resin film having good matted appearances and good printing characteristics, e.g., little suffering missing prints when printed.Type: ApplicationFiled: March 14, 2002Publication date: February 13, 2003Applicant: Mitsubishi Rayon Co., Ltd.Inventors: Yukio Kitaike, Hideyuki Fujii, Kazuhiko Nakagawa
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Patent number: 6515078Abstract: A polymer having at least one reactive terminal or pendant functional group that has been capped with a trifunctional olefinic compound. The polymer can be made by contacting a base polymer having at least one reactive terminal or pendant functional group with a trifunctional olefinic compound under conditions effective to react at least one of the terminal or pendant functional groups with the trifunctional olefinic compound. The capped polymers are particularly suitable as crosslinking toughening agents in multi-components compositions such as adhesives, coatings and matrices for composites.Type: GrantFiled: August 21, 2002Date of Patent: February 4, 2003Assignee: Lord CorporationInventor: Robin F. Righettini
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Patent number: 6506844Abstract: A polymer having at least one reactive terminal or pendant functional group that has been capped with a trifunctional olefinic compound. The polymer can be made by contacting a base polymer having at least one reactive terminal or pendant functional group with a trifunctional olefinic compound under conditions effective to react at least one of the terminal or pendant functional groups with the trifunctional olefinic compound. The capped polymers are particularly suitable as crosslinking toughening agents in multi-components compositions such as adhesives, coatings and matrices for composites.Type: GrantFiled: August 21, 2002Date of Patent: January 14, 2003Assignee: Lord CorporationInventor: Robin F. Righettini
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Patent number: 6500897Abstract: The present invention is a hydrolytically modified, biodegradable polymer and a method of making a hydrolytically modifiable a biodegradable polymer. In a preferred embodiment, the invention is a method of grafting polar groups onto biodegradable polymers and modified biodegradable polymer compositions produced by the method. The polymer compositions are useful as components in flushable and degradable articles. Water-sensitive polymer blends and method of making those polymer blends are also disclosed.Type: GrantFiled: December 29, 2000Date of Patent: December 31, 2002Assignee: Kimberly-Clark Worldwide, Inc.Inventors: James H. Wang, David M. Schertz
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Patent number: 6495623Abstract: A polyvinyl alcohol having at least 1.9 mol % of 1,2-glycol bonds is used as a dispersant for emulsion polymerization or a dispersant for suspension polymerization, and this ensures good polymerization stability even when its amount used is reduced. The aqueous emulsion comprising the polyvinyl alcohol is resistant to water and the viscosity of the aqueous emulsion depends little on ambient temperatures. The vinylic polymers obtained through suspension polymerization in the presence of the polyvinyl alcohol are yellowed little, and the waste water in the suspension polymerization pollutes little the environment.Type: GrantFiled: July 31, 2001Date of Patent: December 17, 2002Assignee: Kuraray Co., Ltd.Inventors: Seiji Tanimoto, Naokiyo Inomata, Naoki Fujiwara
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Publication number: 20020135098Abstract: The present invention provides a method for producing an ethylene-vinyl alcohol copolymer resin composition, said method comprising: a) introducing into an extruder an ethylene-vinyl alcohol copolymer resin having a water content of at least 0.5 weight % and an additional component; b) kneading the resin and the additional component whereby to form an ethylene-vinyl alcohol copolymer resin composition; and c) discharging said resin composition from the extruder; wherein said method further comprises feeding water in a liquid state to the extruder and/or removing water in a liquid state from the extruder. Thereby, strand-breakage or cutting errors are suppressed and thus, molded products such as pellets can be provided with a stable shape.Type: ApplicationFiled: January 22, 2002Publication date: September 26, 2002Applicant: KURARAY CO. LTD.Inventors: Hiroshi Kawai, Masao Hikasa, Takaharu Kawahara, Toshio Tuboi
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Patent number: 6444757Abstract: A polymer having at least one reactive terminal or pendant functional group that has been capped with a trifunctional olefinic compound. The polymer can be made by contacting a base polymer having at least one reactive terminal or pendant functional group with a trifunctional olefinic compound under conditions effective to react at least one of the terminal or pendant functional groups with the trifunctional olefinic compound. The capped polymers are particularly suitable as crosslinking toughening agents in multi-components compositions such as adhesives, coatings and matrices for composites.Type: GrantFiled: June 11, 1999Date of Patent: September 3, 2002Assignee: Lord CorporationInventor: Robin F. Righettini
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Patent number: 6407145Abstract: The invention relates to a novel process for the manufacture of mouldings, especially contact lenses, in which a soluble prepolymer comprising crosslinkable groups is crosslinked in solution, and also to mouldings, especially contact lenses, obtainable in accordance with that process. The present invention relates also to novel prepolymers that can be used in the process according to the invention, especially derivatives of a polyvinyl alcohol having a molecular weight of at least about 2000 that, based on the number of hydroxy groups of the polyvinyl alcohol, comprise from approximately 0.Type: GrantFiled: September 17, 1998Date of Patent: June 18, 2002Assignee: Novartis AGInventor: Beat Müller
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Patent number: 6395817Abstract: Aqueous based graft emulsion copolymers comprising a polymer having a plurality of hydroxyl groups, preferably a vinyl alcohol homo- or copolymer, grafted with a polyethylene. The graft emulsion copolymer can be prepared by polymerizing ethylene and, optionally another ethylenically unsaturated monomer, in an aqueous solution of a polymer having a plurality of pendent hydroxyl groups, especially poly(vinyl alcohol). The graft emulsion copolymer product can have a polyethylene content ranging from 50 to 95 wt %, hydroxyl-containing polymer ranging from 5 to 50 wt %, and up to 45 wt % of another polymerized ethylenically unsaturated monomer. Polymerization is carried out in an aqueous solution containing at least 5 wt %, preferably 10 wt %, of a hydroxyl-containing polymer having a degree of polymerization of 50 to 2200, preferably 100 to 500.Type: GrantFiled: March 15, 2000Date of Patent: May 28, 2002Assignee: Air Products Polymers, L.P.Inventors: John Joseph Rabasco, William Edward Lenney
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Patent number: 6368772Abstract: Process for functionalizing a water-soluble or water-dispersible polymeric organic binder, in which unmodified, water-soluble or water-dispersible polymeric organic binders are reacted with one or more polar aprotic swelling agents which are compatible with the binder, with thorough mixing with one or more compounds which have groups capable of free radical polymerization, compositions obtainable thereby and radiation-sensitive mixtures which contain, as essential components, the above composition, at least one photopolymerization initiator, if required one or more ethylenically unsaturated, photopolymerizable low molecular weight compounds which are compatible with the polymeric binder and further conventional additives and/or assistants, and radiation-sensitive letterpress or relief printing plates which can be produced therefrom.Type: GrantFiled: June 3, 1999Date of Patent: April 9, 2002Assignee: BASF Drucksytems GmbHInventors: Thomas Telser, Uwe Stebani, Alfred Leinenbach, Markus Tönnessen
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Patent number: 6355347Abstract: This invention relates, in general, to methods of making blend compositions of an unmodified polyvinyl alcohol and a metallocene polyolefin or grafted metallocene polyolefin and thermoplastic film and fiber structures comprising these blend compositions. More specifically, this invention relates to methods of making substantially water-free films and fibers comprising unmodified polyvinyl alcohol and a metallocene polyolefin or grafted metallocene polyolefin.Type: GrantFiled: August 1, 2000Date of Patent: March 12, 2002Assignee: Kimberly-Clark Worldwide, Inc.Inventors: David Michael Schertz, James Hongxue Wang, Gregory J. Wideman, William S. Pomplun
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Patent number: 6350518Abstract: This invention relates, in general, to methods of making blend compositions of an unmodified poly vinyl alcohol and a thermoplastic elastomer and thermoplastic film and fiber structures comprising these blend compositions. More specifically, this invention relates to methods of making substantially water-free films and fibers comprising unmodified polyvinyl alcohol and a thermoplastic elastomer.Type: GrantFiled: August 1, 2000Date of Patent: February 26, 2002Assignee: Kimberly-Clark Worldwide, Inc.Inventors: David Michael Schertz, James Hongxue Wang, Gregory J. Wideman, William S. Pomplun
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Patent number: 6346570Abstract: Provided are a water resistant composition comprising a uniform mixture of (A) at least one of modified polyvinyl alcohol containing either from 1 to 20 mol % of &agr;-olefin units with not more than 4 carbon atoms, from 0.01 to 1 mol % of silyl groups, or from 1 to 20 mol % of &agr;-olefin units with not more than 4 carbon atoms and from 0.01 to 1 mol % of silyl groups and (B) an organotitanium compound having a chelating ligand, in a blend ratio of component (A) to the component (B) between 99.99/0.01 and 60/40 by weight; a coating agent comprising the composition; a thermal recording material having a coat layer of the composition; and an ink-jet recording material having an ink-absorbing layer of the composition.Type: GrantFiled: August 22, 2000Date of Patent: February 12, 2002Assignee: Kuraray Co., Ltd.Inventors: Somemiya Kazuyuki, Sadahiko Shiraga, Naoki Fujuwara, Atsushi Jikihara, Toshiyuki Akasawa
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Patent number: 6294609Abstract: Particularly useful as a barrier layer in packaging, e.g. multilayer structures, is a composition based on an ethylene-vinyl alcohol copolymer comprising: 50 to 98% by weight of an EVOH copolymer 1 to 50% by weight of a polyethylene (A) 1 to 15% by weight of a polyethylene (B) being a blend of a polyethylene (B1) and a polyethylene (B2) chosen from elastomers, very-low-density polyethylenes and metallocene polyethylenes, the blend of (B1) and (B2) being cografted by an unsaturated carboxylic acid or a functional acid derivative thereof.Type: GrantFiled: January 19, 2000Date of Patent: September 25, 2001Assignee: AtofinaInventors: Denis Bertin, Denis Germain
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Patent number: 6288165Abstract: A process for producing vinyl acetate polymers comprises, after polymerization of at least one monomer comprising vinyl acetate, adding a conjugated polyene having a boiling point of at least 20° C. Saponified products of the vinyl acetate polymers obtained by this process can give molded articles causing little coloring and generation of gel-like agglomerates.Type: GrantFiled: December 5, 1997Date of Patent: September 11, 2001Assignee: Kuraray Co., Ltd.Inventors: Takeshi Moritani, Kaoru Ikeda, Akimasa Aoyama, Takaharu Kawahara, Yukihiro Ohara, Naoshi Nakagawa, Toshinori Tsugaru
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Publication number: 20010020065Abstract: There is a vinyl 4-hydroxybenzal-vinylalcohol-vinyl acetate copolymer, a 4-t-butoxycarbonyloxybenzal-vinyl alcohol-vinyl acetate copolymer and a vinyl 4-t-butoxycarbonyloxybenzal-vinyl 4-hydroxybenzal-vinyl alcohol-vinyl acetate copolymer suitable for photoresist and methods for preparing the same. The latter two polymers contain 4-hydroxybenzal groups all or parts of which are protected with t-butoxycarbonyl group. Superior in transparency, thermal stability, mechanical strength, and adhesiveness to silicon wafer, the photoresists prepared from the protected copolymers can enhance the resolution of fine circuit by virtue of low weight loss upon the thermal treatment after exposure.Type: ApplicationFiled: March 21, 2001Publication date: September 6, 2001Applicant: Hyundai Electronics Industries Co., Ltd.Inventors: Jin Baek Kim, Hyun Woo Kim
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Patent number: 6265509Abstract: The invention relates to a novel process for the production of mouldings, in particular contact lenses, in which a soluble prepolymer comprising units containing a crosslinkable group and at least one unit containing a modifier is crosslinked in solution, and to mouldings, in particular contact lenses, obtainable by this process. The present invention likewise relates to novel prepolymers which can be employed in the novel process, in particular derivatives of a polyvinyl alcohol having a molecular weight of at least about 2000 which comprises from about 0.Type: GrantFiled: January 22, 1999Date of Patent: July 24, 2001Assignee: Novartis AGInventor: Beat Müller
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Patent number: 6248498Abstract: Disclosed are photoresist compositions comprising a polymeric backbone and a quaternary heterocyclic pendant group, particularly usefull in the preparation of screen printing and sandblast etching photoresists. The pendant groups comprise furanyl substituted quaternary heterocyclic groups, as seen in the formula: where n ranges from 0 to 4 and Z denotes the atoms necessary to complete a substituted or unsubstituted nitrogen containing heterocyclic ring.Type: GrantFiled: December 7, 1999Date of Patent: June 19, 2001Assignee: The Chromaline CorporationInventor: Alexander S. Gybin
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Vinyl 4-t-butoxycarbonyloxbenzal-vinyl alcohol-vinylacetate copolymer and preparation method thereof
Patent number: 6235836Abstract: There is a vinyl 4-hydroxybenzal-vinylalcohol-vinyl acetate copolymer, a 4-t-butoxycarbonyloxybenzal-vinyl alcohol-vinyl acetate copolymer and a vinyl 4-t-butoxycarbonyloxybenzal-vinyl 4-hydroxybenzal-vinyl alcohol-vinyl acetate copolymer suitable for photoresist and methods for preparing the same. The latter two polymers contain 4-hydroxybenzal groups all or parts of which are protected with t-butoxycarbonyl group. Superior in transparency, thermal stability, mechanical strength, and adhesiveness to silicon wafer, the photoresists prepared from the protected copolymers can enhance the resolution of fine circuit by virtue of low weight loss upon the thermal treatment after exposure.Type: GrantFiled: November 27, 1996Date of Patent: May 22, 2001Assignees: Hyundai Electronics Industries Co., Ltd., Korea Advanced Institute of Science and Technology (“KAIST”)Inventors: Jin Baek Kim, Hyun Woo Kim -
Patent number: 6214933Abstract: A composition comprises a polyolefin, such as polyethylene, as a major constituent and poly(ethylene oxide) as a minor constituent. The composition exhibits an inverse phase morphology so that the poly(ethylene oxide) forms a continuous phase and the polyolefin forms a dispersed or discontinuous phase in the film. Desirably, the polyolefin and the poly(ethylene oxide) are grafted with a polar, vinyl monomer. The composition can be used in disposable personal hygiene articles.Type: GrantFiled: June 7, 1999Date of Patent: April 10, 2001Assignee: Kimberly-Clark Worldwide, Inc.Inventors: James H. Wang, David M. Schertz
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Patent number: 6187397Abstract: The film comprises a central layer, composed of a mixture of radical low density polyethylene and of conventional linear polyethylene, sandwiched between two outer layers comprising at least 50% by weight of conventional linear polyethylene, with a relative density of 0.918-0.930, which are devoid of metallocene linear polyethylene, each of the outer layers having a thickness representing 5 to 25% of the total thickness of the film.Type: GrantFiled: April 14, 1999Date of Patent: February 13, 2001Assignee: Societe de Conditionnement et Industrie Societe Anonyme CeisaInventor: Michel Grangette
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Patent number: 6180689Abstract: The present invention concerns a fluid loss control agent for a petroleum industry (or analogous) cement slurry, comprising a surfactant and a micro-gel obtained by chemical cross-linking of a polyvinyl alcohol. The micro-gel and the surfactant are advantageously compatible with a wide range of petroleum industry cement additives and can also produce compositions which are gas tight.Type: GrantFiled: October 26, 1999Date of Patent: January 30, 2001Assignee: Schlumberger Technology CorporationInventor: Eric Moulin
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Patent number: 6172180Abstract: The present invention relates to a block copolymer containing 1-50 first polymer segments and 1-50 second polymer segments. Each first polymer segment has an average mole fraction of monomers possessing a branch point of 0.0001 to 1, whereas each second polymer segment has an average mole fraction of monomers possessing a branch point of 0 to 0.5. The average molecular weights range from 5-2,000 kDa for the first polymer segments, which constitute 5-95% by weight of the block copolymer. The average molecular weights also range from 5-2,000 kDa for the second polymer segments, which constitute 5-95% by weight of the block copolymer. The ratio of the average mole fraction of monomers possessing a branch point of the second polymer segments to that of the first polymer segments is 0 to 0.5. An example of such a copolymer has ethylene oxide or ethylene oxide/propylene oxide as the first polymer segment and polysulfone as the second polymer segment. This block copolymer can further be blended with a bulk polymer.Type: GrantFiled: August 25, 1998Date of Patent: January 9, 2001Assignee: Circe Biomedical, Inc.Inventors: Lawrence F. Hancock, Stephen M. Fagan, Claudy J.-P. Mullon
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Patent number: 6166117Abstract: A water-soluble film, comprising 100 parts by weight of (A) a sulfonic acid group modified polyvinyl alcohol and 0.05-20 parts by weight of (B) gallic acid, salts thereof or a C.sub.1-5 alkyl ester thereof.Type: GrantFiled: June 10, 1998Date of Patent: December 26, 2000Assignee: Kuraray Co., Ltd.Inventor: Hirotoshi Miyazaki
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Patent number: 6150460Abstract: Novel polyfunctional glyoxylated compounds and compositions containing the same are disclosed which are particularly suitable for use as crosslinking components in curable compositions and also find use in imparting wet adhesion properties to water-based paints and coatings. A process for preparing novel polyfunctional glyoxylated compounds is also disclosed.Type: GrantFiled: November 3, 1999Date of Patent: November 21, 2000Assignee: Cytec Technology Corp.Inventors: Balwant Singh, Laurence Wu-Kwang Chang
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Patent number: 6140018Abstract: The invention provides a photosensitive resin and a photosensitive resin composition having excellent water resistance after hardening, excellent developability, and excellent patterning characteristics, and a pattern formation method making use of the composition. The invention provides saponified PVA photosensitive resin which contains structural units represented by formulas (I) and (II): ##STR1## the content of the structural units represented by formulas (I) and (II) in the resin being 0.5-10 mol % with respect to entirety of the structural units of the saponified product of PVA.Type: GrantFiled: August 5, 1999Date of Patent: October 31, 2000Assignee: Toyo Gosei Kogyo Co., Ltd.Inventors: Noriaki Tochizawa, Mitsuharu Miyazaki, Takaho Ito
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Patent number: 6051657Abstract: There is disclosed a method for preparing a silyl-functional living cationic polymer which can be subsequently coupled to form a moisture-curable telechelic system, said method comprising reacting, in the presence of a Lewis acid,(A) at least one cationically polymerizable monomer with(B) an initiator of the formula ##STR1## wherein R is selected from alkyl groups having 1 to 10 carbon atoms or aryl groups having 6 to 10 carbon atoms, R' is a divalent aliphatic hydrocarbon group having at least 3 carbon atoms, X is halogen, Y is selected from the group consisting of halogen, alkoxy. acyloxy and hydroxyl groups and a is 1, 2 or 3.Type: GrantFiled: December 3, 1998Date of Patent: April 18, 2000Assignees: Dow Corning Asia, Ltd., University of Massachusetts LowellInventors: Rudolf Faust, Savvas E. Hadjikyriacou, Toshio Suzuki
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Patent number: 6028141Abstract: Novel polyfunctonal glyoxylated compounds and compositions containing the same are disclosed which are particularly suitable for use as crosslinking components in curable compositions and also find use in imparting wet adhesion properties to water-based paints and coatings. A process for preparing novel polyfunctional glyoxylated compounds is also disclosed.Type: GrantFiled: June 24, 1997Date of Patent: February 22, 2000Assignee: Cytec Technology Corp.Inventors: Balwant Singh, Laurence Wu-Kwang Chang
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Patent number: 6022913Abstract: The present invention provides a container for retort packaging comprising a laminated film having an outermost layer comprising a layer formed of a cross-linked structure containing ester bonds between poly(meth)acrylic acid (A) and polyalcoholic polymer (B); a resin composition having at least the chemical structures (X) [poly(meth)acrylic acid (A) residue], (Y) [poly(meth)acrylic acid (A)-polyalcoholic polymer (B) residue] and (Z) [metal cross-linked ionic residues], wherein the degree of esterification defined by the equation: degree of esterification=c/(b+c+d) is from 0.01 to 0.5 and the degree of ionization defined by the equation: degree of ionization=c/(b+c+d) is from 0.01 to 0.9 (wherein b, c and d represent the molar ratios of the carbon-oxygen double bond in the chemical structure of the resin composition; and a gas barrier film comprising the same.Type: GrantFiled: May 6, 1998Date of Patent: February 8, 2000Assignee: Kureha Chemical Industry Co. Ltd.Inventors: Hideaki Tanaka, Hiroyuki Ohba, Tomoaki Sato, Tomohisa Hasegawa
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Patent number: 6020436Abstract: A universal method to make photosensitive polymers from poly(vinyl alcohol) and poly(vinyl pyridine) is disclosed which generally does not require final purification. These polymers comprise a heterocyclic, light-sensitive pendant group including a moiety having the formula: ##STR1## wherein Z.sup.1 denotes the atoms necessary to form a substituted or unsubstituted aromatic heterocyclic ring; Z.sup.2 denotes the atoms necessary to form a substituted or unsubstituted aromatic or aromatic heterocyclic ring; R is hydrogen or a substituted or unsubstituted alkyl group; M is a divalent organic moiety; Y is a residue from a grafting group that is capable of grafting the pendant group onto a polymeric backbone.Type: GrantFiled: March 9, 1993Date of Patent: February 1, 2000Assignee: The Chromaline CorporationInventors: Alexander S. Gybin, Lawrence C. Van Iseghem
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Patent number: 6001903Abstract: There is disclosed a synthetic resin powder comprising a polymer made from an ethylenically unsaturated monomer or a diolefinic monomer and a polyvinyl alcohol chemically bonded through a sulfide bond at an end thereof to the surface of a particle of the polymer. Although the synthetic resin powder of the present invention can be in the form of powder during transportation, it can easily be dispersed in water by adding water thereto under stirring, because it is excellent in dispersibility in water and blocking resistance. The synthetic resin powder is excellent also in film forming properties, and thus can preferably be used as an admixture for a mortar, etc.Type: GrantFiled: September 13, 1996Date of Patent: December 14, 1999Assignee: Kuraray Co., Ltd.Inventors: Masato Nakamae, Toshiaki Sato
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Patent number: 5994008Abstract: The present invention relates to a composition for forming a fluorescent film for a display and a method of forming a fluorescent film for forming a display surface of a display unit. The composition for forming a fluorescent film for a display has an aqueous medium in which photosensitive resin having a styryl pyridium photosensitive group having an internal salt structure and a fluorescent material which easily reacts with acid are dispersed. The composition is applied to the display surface of a display unit so that a fluorescent layer is formed. Then, the fluorescent material layer is developed to form the fluorescent material layer into a predetermined pattern, and then the fluorescent material layer formed into the predetermined pattern is baked so that a fluorescent film is formed.Type: GrantFiled: April 18, 1997Date of Patent: November 30, 1999Assignee: Futaba Denshi Kogyo K.K.Inventors: Yukio Ogawa, Yoshihisa Yonezawa, Katsutoshi Kougo, Kazuyoshi Ishikawa, Shigeo Itoh, Tetsuaki Tochizawa, Yasuo Kuniyoshi, Toru Shibuya, Hideo Kikuchi
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Patent number: 5985996Abstract: This invention relates to a binder containing the units A, B, C, D and E, wherein A is present in an amount of 10 to 60 mole % and is of the formula ##STR1## B is present in an amount of 1 to 30 mole % and is of the formula ##STR2## C is present in an amount of 5 to 60 mole % and is of the formula ##STR3## D is present in an amount of 0 to 60 mole % and is of the formula ##STR4## and E is present in an amount of 1 to 40 mole % and is of the formula ##STR5## wherein X is an aliphatic, aromatic or araliphatic spacer group,R.sup.1 is hydrogen or an aliphatic, aromatic or araliphatic group,R.sup.2, R.sup.3 and R.sup.4 are hydrogen or alkyl groups with carbon numbers of from 1 to 18 andY is a saturated or unsaturated chain- or ring-shaped spacer group, and photosensitive compositions containing this binder.Type: GrantFiled: August 22, 1997Date of Patent: November 16, 1999Assignee: Kodak Polychrome Graphics LLCInventors: Harald Baumann, Udo Dwars, Celin Savariar-Hauck, Hans-Joachim Timpe
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Patent number: 5939488Abstract: The subject invention provides reactive hot melt adhesive compositions comprising polyurethane prepolymers which have an isocyanate index greater than one and which are prepared from a low hydroxyl number composition comprising high molecular weight polyester diols which have a relatively low melting point. These reactive hot melt adhesive compositions have a faster setting speed than conventional reactive hot melt adhesive compositions. The subject invention also provides a method for bonding articles together which uses such reactive hot melt adhesive compositions and articles which comprise the reactive hot melt adhesive compositions.Type: GrantFiled: October 15, 1997Date of Patent: August 17, 1999Assignee: National Starch and Chemical Investment Holding CorporationInventors: James W. Nowicki, Robert S. Wallach
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Patent number: 5880216Abstract: A polyvinyl alcohol is provided containing structural units of the following formula (I) at a molar fraction of 0.05-0.50 and the structural units of the following formula (II) at a molar fraction of 0.0001 to 0.50; ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and X are as desribed herein, and its use in preparation of gels, particularly hydrogels, effective for use in wound dressing materials.Type: GrantFiled: December 23, 1996Date of Patent: March 9, 1999Assignee: Kuraray Co., Ltd.Inventors: Masao Tanihara, Yoshiharu Fukunishi
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Patent number: 5849840Abstract: A dispersing stabilizer including (A) a polyvinyl alcohol resin containing oxyalkylene groups and having a surface tension of 35 to 55 dyne/cm at 20.degree. C. as a 1% by weight aqueous solution, or said resin and (B) a water-soluble polymer or a polyvinyl alcohol resin having a low degree of hydrolysis and a low degree of polymerization. When using the dispersing stabilizer of the present invention, both of a porosity and a bulk density of a polyvinyl resin particle can be improved at the same time, and, in addition, a distribution of particle size and a uniformity of porosity can be further improved.Type: GrantFiled: April 23, 1997Date of Patent: December 15, 1998Assignee: Nippon Gohsei Kagaku Kogyo Kabushiki KaishaInventors: Motokazu Maruhashi, Kizo Ohnishi
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Patent number: 5849841Abstract: The invention relates to a novel process for the production of mouldings, in particular contact lenses, in which a water-soluble, crosslinkable polymer is crosslinked in solution, and to mouldings, in particular contact lenses, obtainable by this process. The present invention likewise relates to novel water-soluble, crosslinkable polymers, in particular those comprising units of formula (III or IIIa), in which R.sub.1 and R.sub.2, independently of one another, are hydrogen, a C.sub.1 -C.sub.8 alkyl group, an aryl group or a cyclohexyl group, where these groups can be monosubstituted or polysubstituted, R.sub.3 is hydrogen or a C.sub.1 -C.sub.4 alkyl group, and R.sub.Type: GrantFiled: July 30, 1997Date of Patent: December 15, 1998Assignee: CIBA Vision CorporationInventors: Andreas Muhlebach, Beat Muller
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Patent number: 5849810Abstract: The invention relates to a novel process for the manufacture of mouldings, especially contact lenses, in which a soluble prepolymer comprising crosslinkable groups is crosslinked in solution, and also to mouldings, especially contact lenses, obtainable in accordance with that process. The present invention relates also to novel prepolymers that can be used in the process according to the invention, especially derivatives of a polyvinyl alcohol having a molecular weight of at least about 2000 that, based on the number of hydroxy groups of the polyvinyl alcohol, comprise from approximately 0.5 to approximately 80% of units of formula I ##STR1## wherein R is lower alkylene having up to 8 carbon atoms,R.sup.1 is hydrogen or lower alkyl andR.sup.Type: GrantFiled: July 3, 1996Date of Patent: December 15, 1998Assignee: CIBA Vision CorporationInventor: Beat Muller
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Patent number: 5847048Abstract: This invention concerns polymers, having fluoroalkoxy side chains, which are made by a novel process comprising reacting a polymer containing hydroxyl groups, especially poly(vinyl alcohol), with a fluorinated olefin in the presence of a base. The resulting polymers are useful in coatings, as in optical wave guides, and antireflective coatings and in other optical devices.Type: GrantFiled: October 1, 1997Date of Patent: December 8, 1998Assignee: E. I. du Pont de Nemours and CompanyInventor: Andrew Edward Feiring
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Patent number: 5837752Abstract: Compositions for bone repair have been developed based on linear hydrophobic degradable polymers and monomers or macromers, at least one of which includes an anhydride linkage. The monomers and/or macromers crosslink each other but not to the linear polymer to form semi-interpenetrating networks. The compositions can include various excipients, therapeutic and/or diagnostic agents. The compositions can be polymerized in the presence of dissolvable particles such as inorganic salts and proteinaceous materials to provide a porous polymer network. The compositions can be injected into a patient and polymerized in situ or can be polymerized ex vivo and implanted. When polymerized ex vivo, the composition can be shaped into various articles, such as pins, screws, and hollow tubes, which can be used to repair broken bones.Type: GrantFiled: July 17, 1997Date of Patent: November 17, 1998Assignee: Massachusetts Institute of TechnologyInventors: Venkatram R. Shastri, Robert S. Langer, Peter J. Tarcha
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Patent number: 5807657Abstract: A polyvinyl alcohol base photosensitive resin comprised of a polyvinyl alcohol base polymer compound with the structural units of formulae (I) and (II) ##STR1## as well as a photosensitive resin composition comprising this resin and, optionally, an anionic additive and a method of forming a pattern using this photosensitive composition. R.sup.1 is a residue of a heterocyclic ring with quaternarized aromatic species, R.sup.2 is hydrogen atom or lower alkoxyl group, M is 0 or 1, and n is 1 to 6. X.sup.1, X.sup.2 are hydrogen atom, sodium, potassium or ammonium ion. These resins aid in water solubility, compatibility and sensitivity and are used in forming screen printing plates, black matrix or phosphor pattern formation of color cathode ray tubes, color filters, color printing proofs and etching resists.Type: GrantFiled: December 11, 1996Date of Patent: September 15, 1998Assignee: Toyo Gosei Kogyo Co., Ltd.Inventors: Hideo Kikuchi, Noriaki Tochizawa, Yasuo Kuniyoshi
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Patent number: 5807927Abstract: A process for the production of mouldings, in particular contact lenses, in which a water-soluble, crosslinkable polymer is crosslinked in solution, and mouldings, in particular contact lenses, obtainable by this process; and novel water-soluble, crosslinkable polymers which can be employed in the crosslinking process, in particular those based on polyvinyl alcohol having a molecular weight of at least about 2000 which comprises units of the formulae: XI and XII, XI and XIII or XI, XII and XIII. In said Formulae, U is (a) or --Y--NH--CO--O--Z--O--CH.dbd.CH.sub.Type: GrantFiled: September 12, 1997Date of Patent: September 15, 1998Assignee: CIBA Vision CorporationInventors: Friedrich Stockinger, Beat Muller
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Patent number: 5789464Abstract: The invention relates to a novel process for the manufacture of mouldings, especially contact lenses, in which a soluble prepolymer comprising crosslinkable groups is crosslinked in solution, and also to mouldings, especially contact lenses, obtainable in accordance with that process. The present invention relates also to novel prepolymers that can be used in the process according to the invention, especially derivatives of a polyvinyl alcohol having a molecular weight of at least about 2000 that, based on the number of hydroxy groups of the polyvinyl alcohol, comprise from approximately 0.5 to approximately 80% of units of formula I ##STR1## wherein R is lower alkylene having up to 8 carbon atoms,R.sup.1 is hydrogen or lower alkyl andR.sup.Type: GrantFiled: December 22, 1995Date of Patent: August 4, 1998Assignee: CIBA Vision CorporationInventor: Beat Muller
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Patent number: 5783628Abstract: A modified polyvinyl alcohol is disclosed, which comprises the following structural units (I) and (II) and has a weight average molecular weight of from 3,000 to 400,000: ##STR1## wherein R.sup.1 represents H or CH.sub.3 ; and M.sup.1 represents H, an alkali metal, ammonium, alkylammonium, or alkanolammonium. The modified polyvinyl alcohol may be sulfonated. The modified polyvinyl alcohol is used as a dispersant such as a drilling fluid additive.Type: GrantFiled: March 7, 1996Date of Patent: July 21, 1998Assignee: Dai-Ichi Kogyo Seiyaku Co., Ltd.Inventors: Akira Yada, Yoshihiro Kawamori, Hiroshi Nishiguchi, Akira Kitada, Yoshiyuki Mori
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Patent number: 5760154Abstract: The present invention relates to water-soluble, acid groups-containing graft copolymers which are at least partially biodegradable and are based on polyhydroxy compounds and monoethylenically unsaturated carboxylic acids, sulfonic acids and/or phosphonic acids or the salts of said acids as well as optional further monomers. The present invention further relates to a process for producing said graft copolymers at temperatures of up to 200.degree. C. by means of radical polymerization initiators, in that a total mixture is polymerized which consists of 1-60%-wt. of polyhydroxy compounds, their derivatives or their mixtures, and 95-40%-wt. of a monomer mixture comprising at least one monoethylenically unsaturated carboxylic acid, at least one monoethylenically unsaturated sulfonic acid, one monoethylenically unsaturated sulfuric acid ester and/or vinylphosphonic acid or the salts of said acids with monovalent cations, as well as optional further monomers.Type: GrantFiled: February 28, 1995Date of Patent: June 2, 1998Assignee: Stockhausen GmbH & Co., KGInventors: Frank Krause, Helmut Klimmek
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Patent number: 5705553Abstract: Copolymers containing carboxyl groups in aqueous dispersion form or redispersible powder form and their water-soluble salts, based on ethylenically unsaturated and copolymerizable monomers, the macro-molecules of which contain at least 24% by weight of monomer units carrying carboxyl groups prepared, by emulsion copolymerization initiated by free radicals in the presence of polyvinyl alcohol (PVA) or polyvinylpyrrolidone (PVP) dissolved in the aqueous phase and isolation of the copolymers in aqueous dispersion form, and optionally subsequent removal of water by spray drying to obtain redispersible copolymer powders and processes for their preparation and their use as thickeners in aqueous formulations which copolymers, by conversion into their water-soluble salt forms, are useful as thickening agents having a surprisingly advantageous rheology-modifying action in aqueous systems.Type: GrantFiled: November 13, 1995Date of Patent: January 6, 1998Assignee: Hoechst AktiengesellschaftInventor: Rolf Kuropka
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Patent number: 5674946Abstract: The invention relates to activated support materials which comprise epoxy-substituted poly(meth)acrylamides, characterized in that:a) the base support contains aliphatic hydroxyl groups,b) the covalently bonded polymers are bonded to the support via a terminal monomer unit,c) the polymers contain monomer units of the formula I,d) the monomer units are linearly linked, ##STR1## in which R.sup.1, R.sup.2 and R.sup.3 independently of one another are H or CH.sub.3,R.sup.4 is H or alkyl having 1-5 carbon atomsandn is an integer between 1 and 5 and to the use thereof.Type: GrantFiled: April 3, 1996Date of Patent: October 7, 1997Assignee: Merck Patent Gesellschaft mit beschrankter HaftungInventor: Egbert Muller
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Patent number: 5652305Abstract: Polymers containing a high percentage of vinyl alcohol units may be blended with copolymers of alkyl methacrylates and unsaturated organic acids and processed into sheet, film, fiber and other objects which exhibit an useful balance of barrier and strength properties.Type: GrantFiled: August 5, 1996Date of Patent: July 29, 1997Assignee: Rohm and Haas CompanyInventors: Robert Mark Amici, Edward Ewart LaFleur, William James Work
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Patent number: 5637637Abstract: This invention relates to waterborne copolymeric colorant compositions having a dye covalently bonded in the polymer backbone which is prepared by emulsion polymerization of an alkaline solution of a reactive dye and a vinyl monomer. The waterborne copolymeric colorant compositions are useful in formulating waterborne coatings, paints, inks, and primers in various household, personal care and cosmetic applications.Type: GrantFiled: June 30, 1995Date of Patent: June 10, 1997Assignee: Eastman Chemical CompanyInventors: Mahendra K. Sharma, Imelda L. Watson
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Patent number: 5583163Abstract: The invention relates to a novel process for the manufacture of mouldings, especially contact lenses, in which a soluble prepolymer comprising crosslinkable groups is cross-linked in solution, and also to mouldings, especially contact lenses, obtainable in accordance with that process. The present invention relates also to novel prepolymers that can be used in the process according to the invention, especially derivatives of a polyvinyl alcohol having a molecular weight of at least about 2000 that, based on the number of hydroxy groups of the polyvinyl alcohol, comprise from approximately 0.5 to approximately 80% of units of formula I ##STR1## wherein R is lower alkylene having up to 8 carbon atoms,R.sup.1 is hydrogen or lower alkyl andR.sup.Type: GrantFiled: June 5, 1995Date of Patent: December 10, 1996Assignee: Ciba Geigy CorporationInventor: Beat Muller