Polyvinyl Alcohol Patents (Class 525/56)
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Patent number: 4866122Abstract: A composition comprising:(a) at least one linear alternating copolymer of carbon monoxide and an ethylenically unsaturated hydrocarbon; and(b) a vinyl alcohol polymer, as well as articles prepared therefrom and packaging materials prepared therefrom.Type: GrantFiled: April 28, 1988Date of Patent: September 12, 1989Assignee: Shell Oil CompanyInventors: Leonard E. Gerlowski, John R. Kastelic, Robert G. Lutz
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Patent number: 4843121Abstract: Polyvinylazidonitrate and a process of making the same by reacting polyvinitrate with sodium or lithium azide in selected solvents.Type: GrantFiled: June 24, 1985Date of Patent: June 27, 1989Assignee: The United States of America as represented by the Secretary of the ArmyInventor: Everett E. Gilbert
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Patent number: 4833183Abstract: Poly[3,3-bis(hydroxymethyl)oxetane] ("PBHMO") is prepared in high molecular weight (n.sub.inh to 5.2) by polymerizing the trimethylsilylether of 3,3-bis(hydroxymethyl)oxetane with i-Bu.sub.3 Al-0.7 H.sub.2 O cationic catalyst at low temperature, followed by hydrolysis. PBHMO is crystalline, high melting (about 314.degree. C.), highly insoluble and useful in the production of films and fibers. Poly[3-methyl-3-(hydromethyl)oxetane] ("PMHMO") and poly[3-ethyl-3-(hydroxymethyl)oxetane] ("PEHMO") are also prepared in high molecular weight (n.sub.inh up to 3.8) by the same procedures. Copolymers of BHMO, MHMO, and EHMO with each other or containing up to about 50% of other oxethanes, oxiranes and tetrahydrofurans; derivatives and alloys from these polymers and copolymers; and methods of preparing the polymers, copolymers, alloys and derivatives into useful films, fibers and articles is described.Type: GrantFiled: June 3, 1988Date of Patent: May 23, 1989Assignee: Arizona Board of RegentsInventor: Edwin J. Vandenberg
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Patent number: 4828915Abstract: Molecularly oriented films are produced which comprise a layer containing a blend of EVOH and nylon. The films exhibit a desirable balance of oxygen barrier and strength properties, and are ideally suited for many packaging applications.Type: GrantFiled: November 2, 1984Date of Patent: May 9, 1989Assignee: American National Can CompanyInventors: George O. Schroeder, David L. Newsome, William B. Haffner
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Patent number: 4828744Abstract: Conventional polyvinyl alcohol envelopes will not readily dissolve in wash water which has a significant borate concentration and a pH frequently encountered in wash liquors. Herein, such films are rendered sufficiently soluble in such solutions. In the preferred embodiment this is done by utilizing a polyvinyl alcohol film wherein at least a portion of the polyvinyl alcohol has a number average molecular weight below about 50,000, or a polyvinyl alcohol film containing a polyhydroxy compound having a binding constant with borate of at least about 800M.sup.-2, or utilizing a polyvinyl alcohol film having an acid having an acid dissociation constant of 10.sup.-9 M or larger; or a polyvinyl alcohol film containing mixtures thereof.Type: GrantFiled: November 26, 1986Date of Patent: May 9, 1989Assignee: The Clorox CompanyInventors: Edward J. Kaufmann, Barry A. Sudbury
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Patent number: 4820767Abstract: This invention relates to a process for the production of poly(vinyl alcohol) having a weight average molecular weight of at least about 0.4.times.10.sup.6 by polymerizing vinyl acetate at a temperature of from about 0.degree. C. to about 40.degree. C. in the presence of an azo free radical polymerization initiator essentially in the absence of ultraviolet radiation to form an essentially linear poly(vinyl acetate) having a weight average molecular weight of at least about 1.0.times.10.sup.6 and thereafter hydrolyzing the poly(vinyl acetate) to form the desired poly(vinyl alcohol).Type: GrantFiled: November 23, 1984Date of Patent: April 11, 1989Assignee: Allied-Signal Inc.Inventor: Tse C. Wu
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Patent number: 4818788Abstract: Disclosed herein is a new process for producing polyvinyl ester having a high degree of polymerization having an intrinsic viscosity not less than 1.5 dl/g, preferably not less than 2.2 dl/g, and most preferably higher than 3.2 dl/g, said process comprising subjecting vinyl ester monomer to low-temperature emulsion polymerization under specific conditions.Disclosed also herein is a new process for producing polyvinyl alcohol having a high degree of polymerization having an intrinsic viscosity not less than 1.5 dl/g, preferably not less than 2.2 dl/g, and most preferably higher than 3.2 dl/g, said process comprising saponifying in the usual way the polyvinyl ester obtained by low-temperature emulsion polymerization under specific conditions.Type: GrantFiled: July 29, 1987Date of Patent: April 4, 1989Assignee: Kuraray Co., Ltd.Inventors: Toshiaki Sato, Ken Yuki, Junnosuke Yamauchi, Takuji Okaya
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Patent number: 4801636Abstract: A polymeric film material for the rinse release of wash additives comprises a blend of polyvinyl alcohol and an alkyl cellulose. A metalloid oxide cross-linking agent is present in an amount sufficient to sharply reduce the solubility rate of the film blend in an alkaline wash, yet allow dissolution in a less alkaline rinse. Optionally, a hydrophobic cationic species is included to further reduce the dissolution rate in the wash pH. The films remain intact during normal wash cycles and over a range of typical water temperatures, then rapidly dissolve in the rinse. The film can be used to microencapsulate an additive, or made into a water-soluble pouch, or as a soluble seal for a pouch or container.Type: GrantFiled: March 24, 1987Date of Patent: January 31, 1989Assignee: The Clorox CompanyInventors: William L. Smith, Edward J. Kaufmann, Barry A. Sudbury
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Patent number: 4801457Abstract: A therapeutic composition comprising a therapeutic macromolecular agent incorporated in cross-linked polyacetal.Type: GrantFiled: October 7, 1987Date of Patent: January 31, 1989Assignee: Sandoz Pharm. Corp.Inventors: Jorge Heller, Donald W. H. Penhale
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Patent number: 4786685Abstract: A thermoplastic resin composition comprising(1) a thermoplastic resin having an ester structure in the main chain and(2) a hydrolyzed ethylene-vinyl acetate copolymer having an ethylene content of 20 to 60% by mole and a degree of hydrolysis in the vinyl acetate component of at least 95% by mole, and having an ash content of not more than 20 ppm and an alkali metal content of not more than 5 ppm. The composition of the present invention can give molded articles having excellent properties, and is suitable for use as wrapping or packaging materials and engineering plastics.Type: GrantFiled: July 29, 1987Date of Patent: November 22, 1988Assignee: Nippon Gohsei Kagaku Kogyo Kabushiki KaishaInventors: Hiroshi Takida, Kenji Hasegawa, Teruo Iwanami
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Patent number: 4774957Abstract: A material for diagnosis by nuclear magnetic resonance imaging is provided. The material comprises a hydrogel having a high water content. The hydrogel is prepared by the steps of casting an aqueous polyvinyl alcohol solution into a mold, cooling the case aqueous solution to obtain a cooled frozen mass and thawing the cooled frozen mass. The cooling and thawing steps may be repeated up to eight cycles. The hydrogel is also prepared by subjecting the cooled frozen mass to a partial dehydration step in vacuum.Type: GrantFiled: September 11, 1987Date of Patent: October 4, 1988Assignees: Kabushiki Kaisha Toshiba, Nippon Oil Co. Ltd.Inventors: Masao Nambu, Hitoshi Goshima, Isamu Mano
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Patent number: 4740558Abstract: A thermoplastic resin composition containing polyphenylene oxide resin is provided, which is superior in processability and impact resistance as well as heat resistance, chemical resistance and hardness, said thermoplastic resin composition comprising(A) polyphenylene oxide resin or a resin composition containing the same, and(B) ethylene copolymer comprising 50-90% by weight of ethylene, 5-49% by weight of alkyl ester of .alpha.,.beta.-unsaturated carboxylic acid and 0.5-10% by weight of maleic anhydride.Type: GrantFiled: December 11, 1986Date of Patent: April 26, 1988Assignee: Sumitomo Chemical Company, LimitedInventors: Kentaro Mashita, Taichi Nishio, Takashi Sanada, Jinsho Nambu
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Patent number: 4713290Abstract: Polyvinyl alcohol of molecular weight over 500,000 (i.e. 1,500,000 to 2,500,000) is spun as a dilute solution (2-15%) in a relatively non-volatile solvent such as glycerin. The resultant gel fiber is extracted with a volatile solvent such as methanol and dried. Upon stretching at one or more stages during the process, fibers of tenacity above 10 g/denier and modulus above 200 g/denier (e.g. 18 and 450, respectively) are produced.Type: GrantFiled: January 22, 1986Date of Patent: December 15, 1987Assignee: Allied CorporationInventors: Young D. Kwon, Sheldon Kavesh, Dusan C. Prevorsek
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Patent number: 4614762Abstract: The present invention is directed to a high molecular weight, water soluble polymer product of polyethyleneimine, said product is formed by reacting a linear polyethylenimine with formaldehyde and a polyvinyl alcohol. The resultant product is useful as an improved drainage and retention aid in papermaking processes.Type: GrantFiled: June 15, 1984Date of Patent: September 30, 1986Assignee: W. R. Grace & Co.Inventors: Nelson S. Marans, Stephen M. Pulford
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Patent number: 4611019Abstract: The addition of small amounts of selected polyamides or polyesters to plasticized, melt extrudable polyvinyl alcohol homopolymer provides a composition with lower permeability to oxygen and other fixed gases.Type: GrantFiled: June 17, 1985Date of Patent: September 9, 1986Inventors: H. Harald Lutzmann, Gerald W. Miller
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Patent number: 4599267Abstract: Polyvinyl alcohol of molecular weight over 500,000 (i.e. 1,500,000 to 2,500,000) is spun as a dilute solution (2-15%) in a relatively non-volatile solvent such as glycerin. The resultant gel fiber is extracted with a volatile solvent such as methanol and dried. Upon stretching at one or more stages during the process, fibers of tenacity above 10 g/denier and modulus above 200 g/denier (e.g. 18 and 450, respectively) are produced.Type: GrantFiled: January 11, 1984Date of Patent: July 8, 1986Assignee: Allied CorporationInventors: Young D. Kwon, Sheldon Kavesh, Dusan C. Prevorsek
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Patent number: 4596858Abstract: Cross-linked polymeric gels or films are prepared by dissolving in a suitable solvent a linear polymer or polymers containing pendant amidocarbonyl or oxycarbonyl groups, hydroxyl groups present as either pendant groups from the polymer or as a low molecular weight polyol, and a strongly acidic catalyst (which may also be a pendant group on a polymer). The solvent is removed by coagulation and/or drying and the dry material is heat-cured, thus cross-linking and insolubilizing the polymer or polymers.Type: GrantFiled: June 20, 1984Date of Patent: June 24, 1986Inventors: Harry P. Gregor, Edgar Samuelsen, Paul I. Dalven, Charles D. Gregor
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Patent number: 4556151Abstract: Disclosed is a metal vessel comprising an upper member and a lower member, each consisting of a coated cup-shaped formed metal body and a circumferential side seam being formed by lap-bonding the open ends of the upper and lower members to each other through an adhesive, wherein said coated cup-shaped formed metal body is composed of a metal blank having a coating of a vinyl chloride resin having a vinyl chloride unit content of 30 to 97% by weight and a glass transition temperature of at least 40.degree. C.Type: GrantFiled: October 21, 1983Date of Patent: December 3, 1985Assignee: Toyo Seikan Kaisha Ltd.Inventors: Kazuo Taira, Akihiko Morofuji, Seishichi Kobayashi, Hiroshi Ueno
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Patent number: 4552819Abstract: This invention provides an adhesive suitable to use as a hot-melt adhesive, and a heat-recoverable article having a layer of this adhesive, said adhesive adhering to a variety of metals and plastics and being superior in low-temperature brittleness and high-temperature adhesion.The adhesive comprises 50 to 90 wt % of ethylene-vinyl acetate copolymer having a hydrolysis ratio of 50 to 90 wt %, 5 to 30 wt % of polyamide resin having an amine value of 0.5 to 15, and 5 to 30 wt % of styrene-butadiene-styrene block copolymer of styrene-isoprene-styrene block copolymer containing less than 30 wt % of styrene, mixed together.The heat-recoverable article having a layer of the adhesive is prepared by applying said adhesive to at least one part of the surface of a heat-recoverable article made from a rubber, a plastics or a mixture thereof.Type: GrantFiled: October 12, 1983Date of Patent: November 12, 1985Assignee: Sumitomo Electric Industries, Ltd.Inventor: Yutaka Hibino
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Patent number: 4533601Abstract: The reduction of the adhesion to glass of thermoplastic polyvinylbutyral molding compositions, in particular films, which contain plasticizer and in which the polyvinylbutyral component has an increased content of vinyl alcohol units, by addition of a combination of potassium hydroxide, potassium formate or potassium acetate and a compound having a betaine structure, as the anti-adhesive agent. Use of the films with reduced adhesion to glass as the bonding layer for the production of glass laminates.Type: GrantFiled: January 31, 1984Date of Patent: August 6, 1985Assignee: Hoechst AktiengesellschaftInventors: Hans D. Hermann, Klaus Fabian, Joachim Ebigt
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Patent number: 4525511Abstract: A method for priming a high solids enamel automotive finish to improve the adhesion thereto of a sealant composition, which method comprises treating said surface with a strong acid, conveniently by applying a primer composition to said surface, said primer composition comprising a solution, in a volatile organic solvent, of a hydroxy functional film forming resin and at least 0.25 percent of a strong acid, by weight of said resin.Type: GrantFiled: April 6, 1984Date of Patent: June 25, 1985Assignee: Essex Specialty Products, Inc.Inventors: Michael D. Kirby, Michael P. Mazzeo
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Patent number: 4485211Abstract: Under particular conditions, a cationic ring-opening polymerization of a first oxirane monomer selected from the group consisting of an acyclic glycidyl ether, a cyclic glycidyl ether, and a haloalkyl epoxide, in the presence of a hydroxyl-containing organic material ("HCM"), for example a polymer (referred to herein as a `hydroxyl-prepolymer`), and a particular catalyst, produces a polymerization having `living polymerization` characteristics. The result is that molecular weight (mol wt) of the resulting polymer is directly proportional to the conversion of the monomer to said resulting polymer. This HCM serves as a chain propagator which initially furnishes OH groups as propagation sites. Subsequently, a second oxirane monomer, different from said first, is sequentially polymerized to yield a block copolymer. Branched block copolymers, or linear block copolymers of a HCM and (a) one or more glycidyl ethers, or (b) a haloalkyl epoxide and at least one glycidyl ether, may be prepared.Type: GrantFiled: September 15, 1982Date of Patent: November 27, 1984Assignee: The B. F. Goodrich CompanyInventor: Yoshihisa Okamoto
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Patent number: 4480026Abstract: In preparing an opaque backing layer for a photographic film, superior covering power and coating dispersion stability are obtained by (1) dispersing carbon black in a minor phase of polyvinyl pyrrolidone/vinyl acetate copolymer before addition of a major phase of polyvinyl alcohol, and (2) delaying the addition of surfactant or coating aids until after complete mixing of the polyvinyl alcohol with the solid carbon black dispersion. This coating dispersion is particularly useful for the preparation of a dischargeable opaque backing layer for a diffusion transfer film element.Type: GrantFiled: August 2, 1982Date of Patent: October 30, 1984Assignee: E. I. Du Pont de Nemours and CompanyInventors: Robert W. Ashcraft, Rusty E. Koenigkramer
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High molecular weight poly(vinyl acetate) and poly(vinyl alcohol) and processes for their production
Patent number: 4463138Abstract: An improved poly(vinyl acetate) which on hydrolysis and reacetylation has an intrinsic viscosity of at least about 5 dL/g and an improved poly(vinyl alcohol) which on acetylation yields poly(vinyl acetate) having an intrinsic viscosity of at least about 5 dL/g. Such poly(vinyl acetate) can be prepared by photo-initiated free radical bulk polymerization of vinyl acetate with controlled low initiator concentration, polymerization temperature and reaction time. Such poly(vinyl alcohol) can be prepared by conventional alcoholysis of the poly(vinyl acetate).Type: GrantFiled: September 30, 1982Date of Patent: July 31, 1984Assignee: Allied CorporationInventors: Tse C. Wu, James C. West -
Patent number: 4440711Abstract: Polyvinyl alcohol of molecular weight over 500,000 (i.e. 1,500,000 to 2,500,000) is spun as a dilute solution (2-15%) in a relatively non-volatile solvent such as glycerin. The resultant gel fiber is extracted with a volatile solvent such as methanol and dried. Upon stretching at one or more stages during the process, fibers of tenacity above 10 g/denier and modulus above 200 g/denier (e.g. 18 and 450, respectively) are produced.Type: GrantFiled: September 30, 1982Date of Patent: April 3, 1984Assignee: Allied CorporationInventors: Young D. Kwon, Sheldon Kavesh, Dusan C. Prevorsek
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Patent number: 4440898Abstract: A creping adhesive comprises an admixture of an ethylene oxide/propylene oxide copolymer and a high molecular weight thermoplastic polymer.Type: GrantFiled: June 17, 1982Date of Patent: April 3, 1984Assignee: Kimberly-Clark CorporationInventors: William S. Pomplun, Herbert E. Grube
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Patent number: 4436867Abstract: A creping adhesive comprises an admixture of poly 2-ethyl-2-oxazoline and a high molecular weight thermoplastic polymer.Type: GrantFiled: June 17, 1982Date of Patent: March 13, 1984Assignee: Kimberly-Clark CorporationInventors: William S. Pomplun, Herbert E. Grube
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Patent number: 4427825Abstract: A composition of matter comprising a polyamide, preferably polyepsiloncaprolactam, and from 1 to 65 percent of an ethylene vinyl alcohol copolymer. The composition is useful for making moldings, films, and fibers.Type: GrantFiled: November 9, 1981Date of Patent: January 24, 1984Assignee: Allied CorporationInventors: Alfieri Degrassi, William Sacks, John P. Sibilia, Abraham M. Kotliar, Charles D. Mason
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Patent number: 4423095Abstract: Homogeneous compositions comprising certain liquid silicone resins, certain silicon-free, film-forming organic polymers and a compatibilizing liquid and a method for preparing preferred homogeneous compositions wherein the compatibilizing liquid is water are disclosed. The homogeneous compositions are useful for coating a substrate to provide a water-resistant coating on the substrate which can function, for example, as a protective coating or as an adhesive-release coating and; accordingly, a method for coating a substrate, such as paper, is also disclosed.Type: GrantFiled: January 28, 1983Date of Patent: December 27, 1983Assignee: Dow Corning CorporationInventor: John D. Blizzard
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Patent number: 4401790Abstract: Polyvinyl alcohol is manufactured by the alcoholysis of polyvinyl esters, in particular polyvinyl acetate, in the presence of a basic catalyst and in the presence of an alkanol as the solvent. The degree of polymerization of the polyvinyl ester used as the starting material is normally within the range from 400 to 10,000. The catalyst used is preferably an alkali metal hydroxide or an alkali metal alcoholate. The alcoholysis is effected by first preparing a solution of the polyvinyl ester, which is then trans-esterified at an elevated temperature. The resulting polyvinyl alcohol exhibits a high degree of purity. It is suitable for use as a base material for the production, by thermoplastic methods, of shaped articles, chiefly by compression molding, injection molding and extrusion.Type: GrantFiled: July 8, 1981Date of Patent: August 30, 1983Assignee: Hoechst AktiengesellschaftInventors: Hermann ter Jung, Leonhard Reihs, Gerhard Roh
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Patent number: 4393173Abstract: A composition of matter comprising (1) an N-methylol monomer of the following general formula: ##STR1## wherein R is hydrogen, lower alkyl (C.sub.1 -C.sub.4), isopropenyl, or phenyl and R.sub.1 is hydrogen or methyl, and (2) a polyalkoxylate substance having at least a portion of its structure represented by (alkylene oxide).sub.x, wherein x is an integer, the composition containing about x molecules of the N-methylol monomer per molecule of polyalkoxylated substance. Such N-methylol monomer/polyalkoxylated complexes are polymerized to yield ungelled cross-linkable N-methylol polymers. The N-methylol polymers are cross-linked in a controlled manner with polyvinyl alcohol.Type: GrantFiled: September 21, 1981Date of Patent: July 12, 1983Assignee: Air Products and Chemicals, Inc.Inventors: Wiley E. Daniels, Dennis J. Nagy
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Patent number: 4388442Abstract: A stabilizer or dispersing agent for use in a suspension polymerization of a vinyl compound is provided which comprises a modified and partially hydrolyzed polyvinyl alcohol having an average polymerization degree of from 200 to 3,000 and an average hydrolysis degree of from 60 to 90 mol % and including anion hydrophilic groups at the side chains thereof, wherein said anion hydrophilic groups are selected from the group consisting of dicarboxyl groups and/or esters thereof and/or salts thereof, sulfuric esters and/or salts thereof and phosphoric esters and/or salts thereof, and the content of said anion hydrophilic groups is in the range of from 0.02 to 10 mol % per unit mol of the polyvinyl alcohol. A process for preparing a polymer of a vinyl compound is also provided wherein said vinyl compound is polymerized in a suspension thereof suspended by the use of the stabilizer or dispersing agent.Type: GrantFiled: October 10, 1980Date of Patent: June 14, 1983Assignee: Denki Kagaku Kogyo Kabushiki KaishaInventors: Yasuo Taniguchi, Toshio Asano, Haruo Funami, Kouichi Itou
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Patent number: 4361625Abstract: A plasticizer-containing film of a partially acetalized polyvinyl alcohol resin contains as the plasticizer a mixture of an ester of an organic cyclic acid and/or a conventional acetal plasticizer for said resin, and an ester of an oxygen acid of phosphorus.Type: GrantFiled: May 10, 1979Date of Patent: November 30, 1982Assignee: Dynamit Nobel AktiengesellschaftInventors: Rolf Beckmann, Wilhelm Knackstedt
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Patent number: 4338405Abstract: Improved process for the preparation of partially alcoholyzed polyvinyl acetate having good compositional uniformity comprises rapid premixing of the polyvinyl acetate polymer and base catalyst solutions in a static mixer and carrying out the alcoholysis reaction in an intermeshing, self-wiping, twin-rotor mixer or mixing extruder. The process yields polyvinyl alcohol product having a maximum hot water insoluble fraction of about 1.1% by weight obtained by the proper adjustment of the feed temperature, the shear rate in the premixer and the catalyst concentration in the catalyst feed solution.Type: GrantFiled: December 12, 1980Date of Patent: July 6, 1982Assignee: E. I. Du Pont de Nemours and CompanyInventor: Ronald L. Saxton
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Patent number: 4335036Abstract: Polyvinyl butyral plasticizer with propylene oxide oligomers.Type: GrantFiled: May 30, 1980Date of Patent: June 15, 1982Assignee: E. I. Du Pont de Nemours and CompanyInventor: Peter A. Fowell
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Patent number: 4319012Abstract: This invention relates to making dense, spherical particles of vinyl plastisol resins by means of a suspension polymerization procedure. The dense, spherical particles or beads have a diameter of about 10 to about 100 microns and are made in an aqueous medium containing a free-radical yielding polymerization catalyst and in the presence of polyvinyl alcohol, as a suspending agent, and a surfactant having a hydrophile-lipophile balance (HLB) less than about 3.5. The suspension vinyl resins so produced are easily and uniformly mixed with a plasticizer to form low viscosity plastisols which are stable, containing particles of uniform and proper size and capable of producing films, and like products, of good clarity.Type: GrantFiled: August 23, 1979Date of Patent: March 9, 1982Assignee: The B. F. Goodrich CompanyInventor: Marion G. Morningstar
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Patent number: 4312963Abstract: Polyol compositions containing effectively dispersed particulate material featuring critical dispersion characteristics are used to stabilize foam reaction in high resilience polyurethane foam.Type: GrantFiled: January 22, 1981Date of Patent: January 26, 1982Assignee: Olin CorporationInventors: Kiran B. Chandalia, Henry G. Barnowski
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Patent number: 4293473Abstract: Solid adhesive compositions consisting essentially of polyvinyl alcohol or ethylene/vinyl alcohol copolymer, and at least two component crystalline solvent system (such as urea and .epsilon.-caprolactam), ethylene polymer and optionally thermoplastic tackifier and carboxylic acid are disclosed. Outstanding adhesive properties with cellulosics, spun bonded polyolefins, aluminum foil and polyester film substrates have been obtained.Type: GrantFiled: July 25, 1980Date of Patent: October 6, 1981Assignee: E. I. Du Pont de Nemours and CompanyInventor: Ernest F. Eastman
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Patent number: 4287333Abstract: Powders of thermoplastic resins such as polyethylene homopolymer and ethylene-vinyl acetate copolymer are obtained by agitating molten resin in admixture with water and in the presence of a dispersing amount of an alkali metal salt of an organophosphate ester. The particle size distribution of the dispersed resin can, if desired, be regulated by the addition of base thereto.Type: GrantFiled: August 27, 1979Date of Patent: September 1, 1981Assignee: National Distillers and Chemical Corp.Inventor: Dorothee M. McClain
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Patent number: 4284671Abstract: Polymer blends of a polyester and polyvinyl alcohol, or their copolymers, may be fabricated into barrier packaging materials having very low permeabilities to oxygen, other fixed gases and moisture.Type: GrantFiled: May 11, 1979Date of Patent: August 18, 1981Assignee: Clopay CorporationInventors: Leopoldo V. Cancio, Gerald W. Miller, Pai-Chuan Wu
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Patent number: 4284545Abstract: A composition and process are provided for making precipitated biconstituent nylon-polyvinyl alcohol shaped articles by dissolving polyvinyl alcohol and a nylon having an amide group index of less than about 145 in a mixture of a tertiary amine oxide solvent and water, with the solution containing from about 3.0 to about 11% water, to form a biconstituent dispersion wherein the nylon and the polyvinyl alcohol comprise distinct separate phases. Shaped articles can be formed from the biconstituent dispersions of the invention.Type: GrantFiled: July 2, 1979Date of Patent: August 18, 1981Assignee: Akzona IncorporatedInventors: Neal E. Franks, Julianna K. Varga
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Patent number: 4272470Abstract: A film-forming polyvinyl alcohol polymer is mixed with a polyaldehyde-polysaccharide cross-linking agent having at least two monosaccharide units and a plurality of aldehyde groups per molecule, preferably an average of at least one aldehyde group per monosaccharide units. The cross-linking agent, such as a polydialdehyde starch, is used in an amount of about 2.5 to 20% of the theoretical amount required to cross-link all of the available hydroxyl groups of the polyvinyl alcohol polymer. Reaction between the polymer and cross-linking agent is effected in aqueous acidic solution to produce the cross-linked polymer. The polymer product has low electrical resistivity and other properties rendering it suitable for making separators for alkaline batteries. In that event, the mixture of polymer and cross-linking agent is formed into a sheet or film or the like and the film is cut to size and otherwise fabricated into a configuration suitable for a particular end use.Type: GrantFiled: April 30, 1980Date of Patent: June 9, 1981Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Li-Chen Hsu, Dean W. Sheibley, Warren H. Philipp
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Patent number: 4267280Abstract: Pesticide polymers comprising a polymer with a macromolecular backbone and pendant groups having pesticidal groups chemically linked thereto are prepared by reacting a pesticide having a replaceable hydrogen with a multifunctional isocyanate to form a pesticide-isocyanate adduct and then reacting the adduct with the polymer substrate in a mutual solvent to form the pesticide polymers. The chemical linkages connecting the pesticide-adduct to the pendant groups are cleaved under environmental conditions of use to controllably release an effective amount of the active pesticide.Type: GrantFiled: July 20, 1979Date of Patent: May 12, 1981Inventor: Charles L. McCormick
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Patent number: 4258163Abstract: This invention relates to novel partially saponified polyvinyl acetates with a degree of hydrolysis of 30 to 65 mole % which might be considered as vinyl alcohol-vinyl acetate block copolymers. The invention relates further to the application of said novel block copolymers as a pore-forming additive used together with at least one known protective colloid in the homo- and copolymerization of vinyl compounds, primarily of vinyl chloride in a pure aqueous medium.Type: GrantFiled: May 23, 1979Date of Patent: March 24, 1981Assignee: Borsodi Vegyi KombinatInventors: Bela Mariasi, Laszlo Molnar, Janos Toth, Imre Gulya, Miklos Nagy, Ervin Wolfram, Miklos Zrinyi, Gaborne Kovacs, Laszlone Jaksity
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Patent number: 4243769Abstract: Compatibilized blends and composites of materials containing nitrile functionality with materials normally incompatible therewith are formed by mixing the components in the presence of an acid compatibilizing agent.Type: GrantFiled: October 4, 1977Date of Patent: January 6, 1981Assignee: National Distillers and Chemical Corp.Inventor: Ervin G. Pritchett
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Patent number: 4230775Abstract: Ink formulation based on polyvinyl butyral and useful for printing polyvinyl butyral sheeting provides both improved blocking and improved glass adhesion through increased hydroxyl content in the polyvinyl butyral of the ink formulation.Type: GrantFiled: December 16, 1977Date of Patent: October 28, 1980Assignee: E. I. Du Pont de Nemours and CompanyInventors: Burton N. Derick, Robert E. Moynihan, Jon W. Wolfe
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Patent number: 4222926Abstract: A flame-retarding thermoplastic polyester resin composition comprising (1) a polyester obtained from a terephthalic acid or an alkyl ester thereof and a glycol having 2 to 4 carbon atoms, (2) an organohalogen compound, (3) an inorganic flame-retarding supplementary agent, and (4) at least one polymer selected from a saponified polyvinyl acetate having a saponification degree of greater than 50%, an ethylene/vinyl acetate copolymer and a saponified ethylene/vinyl acetate copolymer, and optionally (5) a reinforcing agent; and a process for production thereof.Type: GrantFiled: April 4, 1978Date of Patent: September 16, 1980Assignee: Dainippon Ink & Chemicals, Inc.Inventors: Shioji Mizuno, Norio Enokimoto
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Patent number: 4208528Abstract: Powders of thermoplastic resins such as polyethylene homopolymer and ethylene-vinyl acetate copolymer are obtained by agitating molten resin in admixture with water and in the presence of a dispersing amount of an alkali metal salt of an organophosphate ester. The particle size distribution of the dispersed resin can, if desired, be regulated by the addition of base thereto.Type: GrantFiled: August 17, 1978Date of Patent: June 17, 1980Assignee: National Distillers and Chemical CorporationInventor: Dorothee M. McClain
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Patent number: 4208488Abstract: A thermosetting coating or adhesive composition based on (A) at least one component selected from the group consisting of oligomeric and polymeric compounds containing at least one of the functional groups hydroxyl and epoxy groups, and (B) a polycarboxylic acid mixture comprising trimellitic acid and a major amount of at least one compound of one of the formulae ##STR1## wherein R, R' and R'", being the same or different, each represents a di- to hexavalent hydrocarbon radical having a total of from 1 to 12 carbon atoms, said radical containing from zero to 2 olefinic double bonds, said radical without double bonds being interrupted by up to 3 ether bridges:x and y which may be the same or different, each represents an integer of from 2 to 6;t an integer of from 1 to 5; andz and u, which may be the same or different, each represents zero or an integer of from 1 to 5 and a process for coating a substrate with said composition.Type: GrantFiled: February 15, 1978Date of Patent: June 17, 1980Assignee: Hoechst AktiengesellschaftInventors: Kurt Kraft, Gerd Walz, Thaddaus Wirth
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Patent number: RE30459Abstract: A polysaccharide or polyvinyl alcohol containing a mixture of nitrite ester groups with sulfate or nitrate ester groups with the mixture of ester groups being substantially uniformly distributed among the polymer units of the polysaccharide or polyvinyl alcohol.A nitrite ester of a polysaccharide alcohol having a degree of substitution of less than about 2.0. A nitrite ester of polyvinyl alcohol having a degree of substitution of 1.0 or less.Type: GrantFiled: April 26, 1979Date of Patent: December 23, 1980Inventor: Richard G. Schweiger