With Solid Polymer Derived From Ethylenic Reactants Only Patents (Class 525/57)
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Patent number: 5380794Abstract: A vinyl composition tile formulation is disclosed which comprises polyvinyl chloride, inorganic fillers and from about 0.5% to about 4%, by weight of said formulation, polyvinyl butyral, as a tackifier.Type: GrantFiled: November 2, 1993Date of Patent: January 10, 1995Assignee: Monsanto CompanyInventors: Richard E. Schaefer, James T. Renshaw, Peter M. Maino
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Patent number: 5378758Abstract: Polymers containing a high percentage of vinyl alcohol units may be blended with copolymers of alkyl methacrylates and unsaturated organic acids, the copolymers prefereably containing an adhesion-promoting functionality, the blend preferably containing low levels of a plasticizer to improve melt flow, and the blends in molten form utilized as hot melt adhesives for the bonding of wood, paper, and other celulosic articles.Type: GrantFiled: December 21, 1993Date of Patent: January 3, 1995Assignee: Rohm and Haas CompanyInventors: Robert M. Amici, Newman M. Bortnick, Roger K. Graham, Edward E. LaFleur, William J. Work
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Patent number: 5378759Abstract: 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: December 10, 1992Date of Patent: January 3, 1995Assignee: Rohm and Haas CompanyInventors: Robert M. Amici, Edward E. LaFleur, William J. Work
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Polymeric bland of a matrix resin and absorbent resin and a multivalent metal ion crosslinking agent
Patent number: 5376727Abstract: A composition comprising a blend of (a) a polymeric matrix component comprising crosslinkable polymers made from 80 to 99 parts by weight of at least one .alpha.,.beta.-ethylenically unsaturated monomer and from 1 to 20 parts by weight of at least one chelating compound, (b) a liquid-absorbent component comprising a water-absorbent, preferably water-soluble, polymer, and (c) a multivalent metal ion as a crosslinking agent. This composition is capable of forming liquid-absorbent, semi-interpenetrating networks. The composition of this invention can provide polymeric matrices which, when coated on a transparent backing, result in transparent coatings capable of providing improved combinations of ink absorption and durability, while at the same time retaining transparency and being amenable to the types of processing commonly used in producing transparent graphical materials.Type: GrantFiled: July 9, 1993Date of Patent: December 27, 1994Assignee: Minnesota Mining and Manufacturing CompanyInventors: Mohammad Iqbal, Terrance P. Smith, Stofko, Jr. -
Patent number: 5374679Abstract: A sizing agent for paper, which comprises 100 parts by weight of a polyvinyl alcohol (component A) and from 1 to 20 parts by weight of a compound (component B provided with the following requisites (1) to (4):(1) the backbone chain is a random copolymer of ethylene oxide and propylene oxide, (2) in the backbone chain, the proportion of oxyethylene units is from 20 to 40% by weight, and the proportion of oxypropylene units is from 60 to 80% by weight, (3) of the two terminals, one terminal is a hydroxyl group, and the other terminal is a C.sub.1-10 alkoxyl group or a hydroxyl group, and (4) the weight average molecular weight is from 600 to 1,200.Type: GrantFiled: March 31, 1994Date of Patent: December 20, 1994Assignees: Denki Kagaku Kogyo Kabushiki Kaisha, Nippon Paper Industries Co., Ltd.Inventors: Yoshihumi Nosaka, Osamu Ishiguro
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Patent number: 5373054Abstract: A process for agglomerating a polymer powder which comprises mixing a polymer powder with an oxyalkylene group-containing polyvinyl alcohol resin in the presence of water and drying the resulting mixture. According to the process of the present invention, it is possible to easily prepare the polymer granules having little fine powder, a narrow particle size distribution and a large average particle size.Type: GrantFiled: December 9, 1992Date of Patent: December 13, 1994Assignee: Nippon Gohsei Kagaku Kogyo Kabushiki KaishaInventors: Shinji Sanuki, Yoshinori Chosakon, Tsukasa Oishi
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Patent number: 5369168Abstract: A method for preparing a compatible blend of polyolefin and thermoplastic polyvinyl alcohol comprising:(a) melting polyolefin in the initial elements of a melt extruder,(b) adding and melt blending an unsaturated carboxylic acid or anhydride with the melted polyolefin downstream in the extruder,(c) adding peroxide to the melt blend and grafting the unsaturated carboxylic acid or anhydride onto the polyolefin, and(d) melt blending thermoplastic PVOH into the grafted polyolefin/unsaturated carboxylic acid or anhydride melt mixture.Type: GrantFiled: August 3, 1992Date of Patent: November 29, 1994Assignee: Air Products and Chemicals, Inc.Inventors: Amir Famili, Lloyd M. Robeson, James F. Nangeroni
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Patent number: 5368671Abstract: A paper tube consisting essentially of one or a plurality of paper tapes formed into a tube and a blend adhesive comprising two or more aqueous adhesives different in their concentrations adhering the paper tapes, its production and a package using it. In the paper tube, the adhesive can be coated into a thin film layer even at a high concentration without reducing the initial adhesive force, and the drying process after the coating can be omitted.Type: GrantFiled: May 17, 1993Date of Patent: November 29, 1994Assignee: Fuji Photo Film Co., Ltd.Inventors: Kenji Sashihara, Shigeru Minato
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Patent number: 5369169Abstract: Polymer blends of a) polymers containing predominantly mers of (meth)acrylates and/or glutarimides with b) up to about 40 weight percent of polymers having greater than about 50 tool % vinyl alcohol mers exhibit useful barrier properties to oxygen and other environmental gases, while maintaining or enhancing physical properties and clarity.Type: GrantFiled: October 15, 1993Date of Patent: November 29, 1994Assignee: Rohm and Haas CompanyInventors: Edward E. La Fleur, Robert M. Amici, William T. Freed, William J. Work, William G. Carson
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Patent number: 5367015Abstract: Preparation of soluble polyvinyl acetals having a low degree of crosslinking, which show improved melt viscosity characteristics, by acetalization of soluble polyvinyl alcohols having a low degree of crosslinking, which have been obtained by hydrolysis or alcoholysis of soluble copolymers having a low degree of crosslinking of vinyl esters and monomers having multiple ethylenic unsaturations, for example, glyoxal bisacrylamide. As against comparable non-crosslinked, soluble polyvinyl acetals, polyvinyl acetals having a low degree of crosslinking according to the present invention show increased intrinsic viscosities and surprisingly exhibit advantageous properties in thermoplastic forming, in particular when extruded in a plastified form. The polyvinyl acetals having a low degree of crosslinking furthermore have improved mechanical properties in comparison with non-crosslinked polyvinyl acetals and, in the form of plastified films, are particularly advantageously employed in the production of composite glass.Type: GrantFiled: October 2, 1992Date of Patent: November 22, 1994Assignee: Hoechst AktiengesellschaftInventors: Matthias Gutweiler, Matthias Kroggel
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Patent number: 5362803Abstract: Polymers containing a high percentage of vinyl alcohol units, when treated with acid to remove impurities, may be blended with low levels of copolymers of alkyl methacrylates and N-vinyllactams or N-vinylamides, optionally containing copolymerized acid, and processed into sheet, film, fiber and other objects which exhibit a useful balance of barrier and strength properties.Type: GrantFiled: July 16, 1993Date of Patent: November 8, 1994Assignee: Rohm and Haas CompanyInventors: Edward E. LaFleur, Robert M. Amici, William J. Work
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Patent number: 5362802Abstract: Polymers containing a high percentage of vinyl alcohol units, especially when treated to remove impurities, when blended with copolymers of alkyl (meth)acrylates, N-vinyllactams or N-vinylamides, and unsaturated acids, preferably further with a small amount of plasticizer, may be applied as hot melt adhesives to paper, wood, and other cellulosic articles.Type: GrantFiled: March 18, 1994Date of Patent: November 8, 1994Assignee: Rohm and Haas CompanyInventors: Robert M. Amici, Newman M. Bortnick, Roger K. Graham, Edward E. LaFleur, William J. Work
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Patent number: 5362531Abstract: A sealing composition for a container closure comprises a polymeric matrix material and its oxygen permeability is reduced by incorporating ethylene vinyl alcohol polymer into the composition. The composition can be in fluid or meltable form ready for application to a closure or it can be present as a deposit on the closure, for instance a gasket around the closure.Type: GrantFiled: October 23, 1992Date of Patent: November 8, 1994Assignee: W. R. Grace & Co.-Conn.Inventors: David N. Samuel, Richard S. Williams
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Patent number: 5362801Abstract: Polymers containing a high percentage of vinyl alcohol units, especially when treated to remove impurities, when blended with copolymers of alkyl (meth)acrylates, N-vinyllactams or N-vinylamides, and unsaturated acids, preferably further with a small amount of plasticizer, may be applied as hot melt adhesives to paper, wood, and other cellulosic articles.Type: GrantFiled: December 2, 1993Date of Patent: November 8, 1994Assignee: Rohm and Haas CompanyInventors: Robert M. Amici, Newman M. Bortnick, Roger K. Graham, Edward E. LaFleur, William J. Work
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Patent number: 5359003Abstract: Polysulfide derivatives, having the general formula (A--S--S--).sub.2 X--S--S--A processes for their production and their use for crosslinking of reversion-stable rubber vulcanizates are provided. Crosslinking with reduced reversion and loss of elastomeric properties with age is achieved by the crosslinking system provided by the invention.Type: GrantFiled: August 11, 1993Date of Patent: October 25, 1994Assignee: Huls AktiengesellschaftInventors: Gerhard Horpel, Karl-Heinz Nordsiek
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Patent number: 5356990Abstract: Unique phase morphologies of incompatible thermoplastic polymers, including a higher melting temperature polymer and a lower melting temperature polymer that has been sufficiently chemically compatibilized to form a stable interface in a two-phase system, are achieved by pre-melting the higher melting temperature polymer, adding the compatibilized lower melting temperature polymer in solid form thereto, and thereafter melting the lower temperature polymer with mixing. In particular, in poly(ethylene vinyl alcohol)/modified polyolefin systems, compositions containing between about 35 and about 55 wt. percent EVOH are formed in which the poly(ethylene vinyl alcohol) exists as a continuous phase and the modified polyolefin exists as discrete domains dispersed therein. Such blended compositions have gas barrier properties comparable to homogeneous poly(ethylene vinyl alcohol).Type: GrantFiled: May 31, 1991Date of Patent: October 18, 1994Assignee: Morton International, Inc.Inventor: Mark S. Pucci
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Patent number: 5356709Abstract: The present invention provides an improved coextruded medical grade port tubing. The medical grade port tubing provides characteristics that are desirable in the medical industry and therefore can be used as a medical port tubing in, for example, renal therapy or blood donor tubes. To this end, the present invention provides a non-PVC coextruded medical grade port tubing including: an outer layer comprising a blend of polypropylene copolymer and styrene-ethylene-butylene-styrene copolymer; a tie layer; and a core layer including a blend of polyamide and ethylene vinyl acetate.Type: GrantFiled: May 14, 1992Date of Patent: October 18, 1994Assignee: Baxter International, Inc.Inventors: Lecon Woo, Y. Wilson Cheung, Jerry D. Bartos, Michael T. K. Ling, Indrajit T. Patel, Ying-Cheng Lo
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Patent number: 5354587Abstract: A fluid filtration material made of a porous substrate, e,g. a membrane or a fabric that is coated with a fluorinated copolymer that contains recurring vinyl alcohol units to impart hydrophilicity. The material is crosslinked with multifunctional epoxides to maintain hydrophilicity on exposure to heat or solvent.Type: GrantFiled: November 15, 1993Date of Patent: October 11, 1994Assignee: W. L. Gore & Associates, Inc.Inventor: Dilip R. Abayasekara
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Patent number: 5352736Abstract: A liquid-absorbent composition comprising (a) a polymeric matrix component comprising crosslinked silanol moieties, and (b) a liquid-absorbent component comprising a water-absorbent polymer, preferably a water-soluble polymer. This composition is capable of forming liquid-absorbent, semi-interpenetrating polymeric networks, which are capable of absorbing significant quantities of those liquids that are solvents for the uncrosslinked portion of the network without loss of physical integrity and without leaching or other forms of phase separation. The compositions of this invention provides polymeric matrices which result in transparent coatings capable of providing improved combinations of ink absorption and durability, while at the same time retaining transparency and being amenable to the types of processing commonly used in producing transparent graphical materials.Type: GrantFiled: April 16, 1993Date of Patent: October 4, 1994Assignee: Minnesota Mining and Manufacturing CompanyInventors: John J. Stofko, Jr., Mohammad Iqbal
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Patent number: 5349017Abstract: A polyvinyl chloride resin composition comprising (i) 100 parts by weight of a polyvinyl chloride resin and (ii) 2 to 40 parts by weight of a multi-stage copolymer obtained by polymerizing resin component formable monomers in the range of from more than 30 parts by weight to 50 parts by weight in three stages onto 50-70 parts by weight of a butadiene elastomer having a glass transition temperature ranging from -40.degree. C. to 5.degree. C. obtained by a copolymerization of a monomer mixture of 70 to 90% by weight of butadiene, 10 to 30 percent by weight of an aromatic vinyl monomer and a polyfunctional monomer added in an amount corresponding to 3 to 10 parts by weight per 100 parts by weight of the total amount of the butadiene and aromatic vinyl monomer.Type: GrantFiled: December 1, 1992Date of Patent: September 20, 1994Assignee: Mitsubishi Rayon Company Ltd.Inventors: Koji Matsumoto, Masaru Morimoto, Masahiro Osuka, Naomi Uno
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Patent number: 5346950Abstract: A resin composition comprising 5 to 95 parts by weight of a saponified product of an ethylene-vinyl acetate copolymer (A) having an ethylene content of 20 to 60 mol % and a degree of saponification of at least 90% and 95 to 5 parts by weight of a styrene-based polymer (B) having mainly syndiotactic configuration. The resin composition has gas barrier properties and a markedly improved heat resistance.Type: GrantFiled: October 25, 1993Date of Patent: September 13, 1994Assignees: Kuraray Co., Ltd., Idemitsu Petrochemical Co., Ltd.Inventors: Taichi Negi, Akira Mochizuki, Shiro Nagata, Komei Yamasaki, Keisuke Funaki, Takashi Sumitomo
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Patent number: 5340650Abstract: A fiber comprising a vinyl alcohol units-containing polymer, said polymer being modified at the oxygen atoms of its alcoholic hydroxyl groups with a group represented by the following formula I ##STR1## wherein M represents a chelate-forming metal atom and R represents an alkyl group. The fiber has excellent resistance to hot water and wet heat and does not stick, adhere or shrink even when dyed at high temperatures or treated by steam ironing, thus proving to be of markedly high commercial value.Type: GrantFiled: February 18, 1993Date of Patent: August 23, 1994Assignee: Kuraray Company LimitedInventors: Kiyoshi Hirakawa, Izumi Watadani, Kazuhiko Tanaka, Masao Kawamoto, Takaaki Tanaka, Hirohumi Sano, Hayami Yoshimochi, Masahiro Sato
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Patent number: 5340522Abstract: A multifilament yarn of polyvinyl alcohol having a degree of polymerization of at least 1500, the yarn having a tensile strength of at least 10 g/d and an index of hot water resistance of at least 50.Type: GrantFiled: October 29, 1993Date of Patent: August 23, 1994Assignee: Toray Industries, Inc.Inventors: Atsushi Taniguchi, Masaharu Mizuno, Mitsuo Suzuki
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Patent number: 5338502Abstract: A process for preparing a molded article of a hydrolyzed ethylene-vinyl acetate copolymer which includes separately melting each of a hydrolyzed ethylene-vinyl acetate copolymer and a polyolefin, admixing the melted copolymer with the melted polyolefin in a weight ratio of the hydrolyzed ethylene-vinyl acetate copolymer to the polyolefin of 30/70 to 70/30 and molding the mixture, according to which the molded article having improved flex-crack resistance, stretchability and thermoformability can be obtained with minimized deterioration of gas-impermeability.Type: GrantFiled: June 22, 1992Date of Patent: August 16, 1994Assignee: Nippon Gohsei Kagaku Kogyo Kabushiki KaishaInventors: Takamasa Moriyama, Hiroki Masumoto, Kuniyasu Kato
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Patent number: 5338490Abstract: A two-phase composite of ionically-conductive pressure-sensitive adhesive, biomedical electrodes using the composite and methods of preparing the composite and the electrode are disclosed. The continuous phase is a hydrophilic, solid state pressure-sensitive adhesive composition ionically-conductive regardless of an amount of water present in the composition. The discontinuous phase are domains of a hydrophobic pressure-sensitive adhesive which enhances adhesion of the composite to mammalian skin while maintaining acceptable alternating current impedance of the composite.Type: GrantFiled: August 31, 1993Date of Patent: August 16, 1994Assignee: Minnesota Mining and Manufacturing CompanyInventors: Timothy M. Dietz, Robert A. Asmus, Rosa Uy
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Patent number: 5324779Abstract: Crosslinkable compositions with a polyethylene base are described which comprise a major proportion, for example 65 to 95% by weight, of at least one polymer selected from the polyethylenes grafted by a silane and ethylene-triethoxyvinylsilane copolymers; a minor proportion, for example, from 5 to 35% by weight, of at least one polymer selected from the hydrophilic polymers which are incompatible with ethylene polymers; as well as, added to the total weight of polymers (a) and (b), a small proportion, for example, from 1 to 10% by weight, of at least one polymer selected from the copolymers and the terpolymers with an ethylene base to react chemically with said incompatible hydrophilic polymer; and a catalytic proportion, for example of 0.001 to 0.3% by weight, of at least one hydrolytic catalyst. These crosslinkable compositions can be shaped by extrusion, extrusion blow-molding or injection molding and then crosslinked by heating in the presence of water.Type: GrantFiled: October 21, 1991Date of Patent: June 28, 1994Assignee: Institut Francais Du PetroleInventors: Jacques Jarrin, Gaetan Serpe, Francois Dawans
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Patent number: 5322892Abstract: A melt process for forming fibers from blends of polymers containing a high percentage of vinyl alcohol units with terpolymers of alkyl methacrylates, unsaturated acids, anhydrides or glycidyl-containing esters, and N-vinyllactams or N-vinylamides is described.Type: GrantFiled: November 25, 1992Date of Patent: June 21, 1994Assignee: Rohm and Haas CompanyInventors: Edward E. LaFleur, Robert M. Amici, William J. Work
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Patent number: 5319022Abstract: The first molded structure of the present invention is formed from ethylene copolymer compositions comprising (A) 50-80% by weight of an ethylene/unsaturated ester copolymer, and (B) 50-20% by weight of an ethylene/vinyl alcohol copolymer having an apparent melt viscosity, as measured at 220.degree. C. and a rate of shear of 100 sec.sup.-1, smaller by 300-1000 Pa.multidot.s than that of said ethylene/unsaturated ester copolymer (A), said molded structures having a stratiform structure wherein said ethylene/vinyl alcohol copolymer (B) has been dispersed into said molded structure in the form of thin layers.The first ethylene copolymer compositions according to the invention are the same as those mentioned above, except that parts of the above-mentioned component (A) have been replaced by a graft modified product (C) of an ethylene/.alpha.-olefin copolymer, and are excellent in heat stability, film forming properties and extrusion kneading properties.Type: GrantFiled: August 26, 1992Date of Patent: June 7, 1994Assignee: Du Pont-Mitsui Polychemicals Co., Ltd.Inventors: Toru Fukada, Hiroshi Ito
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Patent number: 5310788Abstract: An improved saponified ethylene-vinyl acetate copolymer composition comprising(A) 50 to 99.5 weight % of a saponified ethylene-vinyl acetate copolymer,(B) 0.4 to 50 weight % of an ethylene copolymer having a density of 0.90.about.0.94 g/cm.sup.3, and(C) a graft polymer obtainable by grafting an ethylenically unsaturated carboxylic acid or a derivative thereof to a polyolefin resin and reacting the adduct with a polyamide oligomer or polyamide.Type: GrantFiled: April 29, 1992Date of Patent: May 10, 1994Assignee: Nippon Gohsei Kagaku Kogyo Kabushiki KaishaInventors: Takamasa Moriyama, Hiroshi Takida, Tomoyoshi Uemura
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Patent number: 5304420Abstract: Fibers composed of a vinyl alcohol unit-containing polymer, or composite fibers, yarns or fiber products composed of the phase of the vinyl alcohol unit-containing polymer and the other fiber-forming polymer phase are acetalized with at least one of aldehyde compounds represented by the formulas,OHC--CH.sub.2 --C(R.sup.1)(R.sup.2)--COOBandOCH--C(R.sup.3)(R.sup.4)--COOBwherein B is a hydrogen atom or an alkyl group, R.sup.1, R.sup.2, R.sup.3 and R.sup.4, independently from each other, denote a hydrogen atom or an alkyl group, and at least one of R.sup.1 and R.sup.2 and at least one of R.sup.3 and R.sup.4 are alkyl groups,and a carboxyl group is then converted into a salt to form fibers, yarns or fiber products having high moisture absorption and high water absorption.Type: GrantFiled: August 20, 1992Date of Patent: April 19, 1994Assignees: Kuraray Co., Ltd., Yunitika Ltd.Inventors: Kiyoshi Hirakawa, Kazuhiko Tanaka, Masao Kawamoto, Tomoyasu Tsuda
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Patent number: 5298334Abstract: An improved saponified ethylene-vinyl acetate copolymer composition comprising(A) 50 to 99.5 weight % of a saponified ethylene-vinyl acetate copolymer,(B) 0.4 to 50 weight % of an ethylene copolymer having a density of 0.90.about.0.94 g/cm.sup.3, and(C) a graft polymer obtainable by grafting an ethylenically unsaturated carboxylic acid or a derivative thereof to a polyolefin resin and reacting the adduct with a polyamide oligomer or polyamide.Type: GrantFiled: August 21, 1991Date of Patent: March 29, 1994Assignee: Nippon Gohsei Kagaku Kogyo Kabushiki KaishaInventors: Takamasa Moriyama, Hiroshi Takida, Tomoyoshi Uemura
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Patent number: 5296532Abstract: The invention relates to adhesive compositions for gluing wood containing aqueous vinyl ester graft copolymer dispersions and water-soluble acid metal salts or free acids, in which the adhesive compositions exhibit outstanding resistance to hot water and have high storage stability. The vinyl ester graft copolymer comprises from 2 to 12 percent by weight, based on the total weight of the graft copolymer, of one or more polyvinyl alcohols having a degree of hydrolysis of from 60 to 99 mol persent and 88 to 98 percent by weight, based on the total weight of the graft copolymer, of a grafting monomer mixture. The grafting monomer mixture contains from 5 to 50 percent by weight, based on the total weight of the monomer mixture, of vinyl esters of saturated, highly branched aliphatic monocarboxylic acids having 9 or 10 carbon atoms, vinyl pivalate, diisopropyl maleate, diisopropyl fumarate, vinyl chloride and mixtures thereof.Type: GrantFiled: February 14, 1992Date of Patent: March 22, 1994Assignee: Wacker-Chemie GmbHInventors: Reinhard Haerzschel, Rudolf Weissgerber, Herbert Kaiser, Wilhelm Kaiser
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Patent number: 5296537Abstract: Polymer blends of a) polymers containing predominantly mers of (meth)acrylates and/or glutarimides with b) up to about 40 weight percent of polymers having greater than 50 mol % vinyl alcohol mers exhibit useful barrier properties to oxygen and other environmental gases, while maintaining or enhancing physical properties and clarity.Type: GrantFiled: February 16, 1993Date of Patent: March 22, 1994Assignee: Rohm and Haas CompanyInventors: Edward E. La Fleur, Robert M. Amici, William T. Freed, William J. Work, William G. Carson
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Patent number: 5283281Abstract: A multifilament yarn of polyvinyl alcohol having a degree of polymerization of at least 1500, the yarn having a tensile strength of at least 10 g/d and an index of hot water resistance of at least 50.Type: GrantFiled: February 22, 1993Date of Patent: February 1, 1994Assignee: Toray Industries, Inc.Inventors: Atsushi Taniguchi, Masaharu Mizuno, Mitsuo Suzuki
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Patent number: 5280065Abstract: A saponified ethylene-vinyl acetate copolymer composition comprising(A) 50 to 99.5 weight % of a saponified ethylenevinyl acetate copolymer,(B) 0.4 to 50 weight % of a polyolefin resin, and(C) a graft polymer obtainable by grafting an ethylenically unsaturated carboxylic acid or a derivative thereof to a polyolefin resin and reacting the adduct with a polyamide oligomer or polyamide, which composition satisfies the relation: M.sub.2 /M.sub.1 =not less than 2 wherein M.sub.2 and M.sub.1 are the melt flow rates of (B) and (A), respectively, under a load of 2160 g at 210.degree. C.Type: GrantFiled: January 31, 1991Date of Patent: January 18, 1994Assignee: Nippon Gohsei Kagaku Kogyo Kabushiki KaishaInventors: Takamasa Moriyama, Hiroyuki Honda, Hiroshi Takida
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Patent number: 5278229Abstract: A polyolefin resin composition comprising(A) 50 to 99.5 weight % of a polyolefin resin,(B) 0.4 to 50 weight % of a saponified ethylenevinyl acetate copolymer, and(C) 0.1 to 15 weight % of a graft polymer obtainable by grafting an ethylenically unsaturated carboxylic acid or a derivative thereof to a polyolefin resin and reacting the adduct with a polyamide oligomer or polyamide, which composition satisfies the relation: M.sub.2 /M.sub.1 =not less than 1.5 wherein M.sub.2 and M.sub.1 are the melt flow rates of (B) and (A), respectively, under a load of 2160 g at 210 C. The present invention is predicated on the above finding.Type: GrantFiled: January 31, 1991Date of Patent: January 11, 1994Assignee: Nippon Gohsei Kagaku Kogyo Kabushiki KaishaInventors: Kuniyoshi Asano, Tomoyoshi Uemura, Hiroshi Takida
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Patent number: 5274030Abstract: Hot water and superheated steam resistant barrier films, well adopted as packaging materials, e.g., for perishable comestibles, notably foodstuffs, at least in part include at least one layer of a polymer alloy comprising (a) at least one ethylene-vinyl alcohol (EVOH) copolymer, (b) at least one polypropylene and (c) a compatibilizing amount of at least one compatibilizing agent therefor.Type: GrantFiled: November 24, 1992Date of Patent: December 28, 1993Assignee: AtochemInventors: Richard Audry, Pierre Nogues
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Patent number: 5272208Abstract: A modified block copolymer composition comprising a thermoplastic polymer and a modified block copolymer consisting essentially of a base block copolymer of a monovinyl substituted aromatic hydrocarbon polymer block and an olefin compound polymer block having an ethylenic unsaturation degree not exceeding 20%, the base block copolymer having a molecular unit containing a carboxylic acid group and/or a group derived therefrom grafted thereto. The modified block copolymer composition of the present invention is a resinous composition excellent in impact resistance, adhesion, paint adhesion, weatherability, resistance to thermal deterioration, transparency and gloss or a rubbery or leather-like composition excellent in heat resistance, adrasion resistance, compression set resistance, adhesion, transparency, oil resistance, weatherability and resistance to heat aging.Type: GrantFiled: January 10, 1992Date of Patent: December 21, 1993Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Toshinori Shiraki, Fusakazu Hayano, Hideo Morita
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Patent number: 5272209Abstract: A modified block copolymer composition comprising a thermoplastic polymer and a modified block copolymer consisting essentially of a base block copolymer of a monovinyl substituted aromatic hydrocarbon polymer block and an olefin compound polymer block having an ethylenic unsaturation degree not exceeding 20%, the base block copolymer having a molecular unit containing a carboxylic acid group and/or a group derived therefrom grafted thereto. The modified block copolymer composition of the present invention is a resinous composition excellent in impact resistance, adhesion, paint adhesion, weatherability, resistance to thermal deterioration, transparency and gloss or a rubbery or leather-like composition excellent in heat resistance, adrasion resistance, compression set resistance, adhesion, transparency, oil resistance, weatherability and resistance to heat aging.Type: GrantFiled: January 21, 1992Date of Patent: December 21, 1993Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Toshinori Shiraki, Fusakazu Hayano, Hideo Morita
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Patent number: 5270358Abstract: A composite of a gel of swollen hydrocolloid dispersed in a pressure sensitive adhesive matrix is provided. The gel has a natural or synthetically derived hydrocolloid swollen with a non-volatile swelling agent, such that the gel may have a shear modulus of less than 6.2.times.10.sup.6 dynes/cm.sup.2. The gel-adhesive composite has continued skin adhesion whether applied to or existing in dry or moist skin conditions. The gel contributes a high moisture vapor transmission rate to attempt to maintain dry skin conditions while the adhesive maintains skin adhesion. The gel-adhesive composite may be used in a variety of tape, dressing, bandage, drape, or other skin contacting usage and may optionally include antimicrobial agents to treat the skin while adhesion continues.Type: GrantFiled: June 25, 1992Date of Patent: December 14, 1993Assignee: Minnesota Mining and Manufacturing CompanyInventor: Robert A. Asmus
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Patent number: 5262475Abstract: A polymer composition in the form of an alloy is disclosed, having hydrophilic and anti-fogging properties. The polymer alloy can be used as a coating, as an unsupported film or as a substrate having the desired anti-fogging properties.The composition can be used where hydrophilic properties are desired. Surfaces coated with the composition described herein are more readily wetted by water or aqueous fluids, and may have a coefficient of friction of 0.10 or less when in contact with water.The preferred composition contains a water-soluble polyvinyl alcohol and a water-soluble polyvinyl pyrollidone polymer in a weight ratio of about 4:1 to about 1:10.A crosslinking agent comprised of a melamine, a mineral acid or a strong organic acid is included.The composition is preferably applied to a substrate, such as a lens, and cured to form the coating.Type: GrantFiled: May 12, 1992Date of Patent: November 16, 1993Assignee: Film Specialties, Inc.Inventor: Walter S. Creasy
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Patent number: 5260371Abstract: The present invention relates generally to toughened ethylene vinyl alcohol ("EVOH") compositions having improved melt processing stability. More specifically, the EVOH compositions comprise anhydride-modified polyolefin toughening resin and a stabilizer system comprising a basic inorganic compound. In the preferred embodiment, the toughening resin and basic inorganic compound are melt blended in a first step and later melt blended with the EVOH composition in a second step.Type: GrantFiled: August 25, 1992Date of Patent: November 9, 1993Assignee: E. I. Du Pont de Nemours and CompanyInventor: John C. Chen
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Patent number: 5248550Abstract: Gel coating of thermoplastic particles, such as polyimide particles, with a polyketone or polyvinyl alcohol gel, and applying the gel coated particles to reinforcement, e.g. carbon, fibers to form a pre-preg. Such gel coated thermoplastic particles can be mixed with a thermosetting resin to form a pre-preg, which can be cured at elevated temperatures to form a composite having damage tolerance characteristics. The gel coating is applied to the thermoplastic particles by contacting such particles with a polymerizable material such as acetone in a weakly acidic solution to cause the acetone to undergo tautomerism, and in the presence of a polymerization promoter or catalyst, preferably certain anionic surfactants such as sulfated ammonium salts, to convert the tautomer to polyacetone gel of low molecular weight, which coats or encapsulates the thermoplastic particles.Type: GrantFiled: March 12, 1991Date of Patent: September 28, 1993Assignee: Lockheed CorporationInventors: Russell L. Turpin, Anthony L. Green
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Patent number: 5240995Abstract: A two phase adhesive matrix for use in an electrically powered iontophoretic delivery device is provided. The adhesive matrix comprises an adhesive hydrophobic polymer phase and about 15 to 60 wt % on a dry weight basis of a hydrophilic polymer phase distributed through the hydrophobic polymer phase. The hydrophilic phase forms upon hydration an interconnecting network of aqueous pathways for passage of the agent through the adhesive. The adhesive can be used to adhere an electrode assembly of an iontophoretic delivery device to a body surface such as skin or a mucosal membrane. Alternatively, the adhesive can be used to adhere together two or more elements of an iontophoretic delivery device.Type: GrantFiled: August 6, 1991Date of Patent: August 31, 1993Assignee: Alza CorporationInventors: J. Richard Gyory, Ronald P. Haak, Felix Theeuwes, Patrick J. Lew
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Patent number: 5241006Abstract: A composition comprising a blend of (a) a polymeric matrix component comprising crosslinkable polymers made from 80 to 99 parts by weight of at least one .alpha.,.beta.-ethylenically unsaturated monomer and from 1 to 20 parts by weight of at least one chelating compound, (b) a liquid-absorbent component comprising a water-absorbent, preferably water-soluble, polymer, and (c) a multivalent metal ion as a crosslinking agent. This composition is capable of forming liquid-absorbent, semi-interpenetrating networks. The composition of this invention can provide polymeric matrices which, when coated on a transparent backing, result in transparent coatings capable of providing improved combinations of ink absorption and durability, while at the same time retaining transparency and being amenable to the types of processing commonly used in producing transparent graphical materials.Type: GrantFiled: October 24, 1990Date of Patent: August 31, 1993Assignee: Minnesota Mining and Manufacturing CompanyInventors: Mohammad Iqbal, Terrance P. Smith, John J. Stofko, Jr.
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Patent number: 5240994Abstract: A solid surface having anionic groups capable of reacting with a polyethylene imine substituted at least in part by at least 50% by weight of a hydrophilic nonionic polymer having a molecular weight within the range from about 400 to about 200,000 is provided with a hydrophilic biopolymer-repellent outer surface layer thereof by reacting such a polyethylene imine substituted by nonionic hydrophilic polymer with anionic groups on the solid surface, in an amount sufficient to produce biopolymer-repellent solid surface, and accordingly having low spontaneous adsorption of proteins and other biopolymers through electrostatic attraction and/or hydrophobic interaction.Type: GrantFiled: September 13, 1991Date of Patent: August 31, 1993Assignee: Berol Nobel ABInventors: Carina Brink, Eva Osterberg, Krister Holmberg
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Patent number: 5238994Abstract: A process for improving the size distribution of granules formed during synthesis of polyvinyl butyral which involves delaying addition of surfactant to the reaction medium in which the polyvinyl butyral is being formed until after gel break. The surfactant is usually polyacrylic acid or a copolymer of acrylic acid with up to 20 weight percent of one or more copolymerized monomers, in an amount effective to counteract excessive agglomeration of the polyvinyl butyral granules.Type: GrantFiled: September 9, 1991Date of Patent: August 24, 1993Assignee: Monsanto CompanyInventor: Nandlal S. Reejhsinghani
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Patent number: 5239012Abstract: Ambient temperature curing compositions comprising a hydroxyl component and an anhydride component are disclosed. Cure is accelerated by the presence of an onium compound. The compositions are useful in the formulation and application of coatings.Type: GrantFiled: February 21, 1991Date of Patent: August 24, 1993Assignee: PPG Industries, Inc.Inventors: Edward E. McEntire, James A. Claar, Stephen J. Thomas, David N. Walters
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Patent number: 5234992Abstract: An adhesive composition suitable for use as an in-line contact adhesive for electrotransport drug delivery systems.Type: GrantFiled: February 9, 1989Date of Patent: August 10, 1993Assignee: ALZA CorporationInventors: J. Richard Gyory, Ronald P. Haak, Felix Theeuwes, Patrick J. Lew
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Patent number: 5230935Abstract: Multilayer composites coextruded with the use of polyolefins and of impact-reinforced impervious resin compositions based on hydrolysed copolymers of vinyl acetate and ethylene comprising, as an additive improving the impact strength, elastomeric copolymers of ethylene and propylene which are modified by grafting an .alpha.,.beta.-ethylenically unsaturated carboxylic acid and, preferably, by maleic anhydride.The coextruded multilayer composites are very particularly suitable for the manufacture of fuel storage vessels combining impact strength and high imperviousness to petrol and to petrol/alcohol mixtures.Type: GrantFiled: November 27, 1992Date of Patent: July 27, 1993Assignee: Solvay & Cie (Societe Anonyme)Inventors: Didier Delimoy, Pierre De Longree