Polyvinyl Alcohol Or Partially Hydrolyzed Polyvinyl Acetate Or Chemically Modified Forms Thereof Patents (Class 524/803)
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Patent number: 6706805Abstract: Building materials containing copolymers derived from vinyl ester, (meth)acrylic ester and optionally ethylene comonomers, stabilized with a polyvinylalcohol protective colloid, as their aqueous dispersions or as redispersible polymer powders which are redispersible in water, exhibit improved processing properties and set properties. The copolymers are obtained by emulsion or suspension copolymerization in an at least two step process wherein a) the vinyl ester component is polymerized, optionally with ethylene and further copolymerizable comonomers, to a conversion of from 90 to 100% by weight in a first step, and b) the ester(s) of (meth)acrylic acid are subsequently added and polymerized in a second step. The copolymer dispersion obtained may be dried to form a redispersible copolymer powder.Type: GrantFiled: May 22, 2002Date of Patent: March 16, 2004Assignee: Wacker Polymer Systems, GmbH & Co. KGInventor: Hans-Peter Weitzel
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Patent number: 6699920Abstract: A method of manufacturing a polishing substrate is disclosed. The method includes disposing into a mold a reaction mixture of dibasic acid and a hydroxylated polymer, and applying a pressure and a temperature to the reaction mixture that are sufficient to cause polymerization and substrate formation in the mold. The dibasic acid is preferably adipic acid. Before pressure and temperature are applied to the reaction mixture, the reaction mixture is capable of being fortified with a polishing agent and/or a filler for controlling modulus and/or the coefficient of expansion.Type: GrantFiled: February 13, 2002Date of Patent: March 2, 2004Inventor: Nicholas Andros
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Publication number: 20040010078Abstract: A W/O/W type composite emulsion, wherein a W/O type emulsion containing water, an oil ingredient and a lipophilic emulsifier each in a proportion expressed in term of mass ratio falling within a range enclosed with bold lines in FIG. 1 is dispersed in an external aqueous phase with a water-soluble macromolecule blended therein has a sufficient stability, and permits preserving a percent inclusion of medical substances included in an internal aqueous phase of the W/O/W type composite emulsion at a high level.Type: ApplicationFiled: May 28, 2003Publication date: January 15, 2004Inventors: Tohru Nagahama, Tomoaki Yoshino
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Patent number: 6642285Abstract: A composition including a hydraulic cement for implantation in a human or animal body. The hydraulic cement includes a first component, a second component, and a third component. The first component includes a calcium source while the second component includes water. The third component is a hydrophobic liquid. The composition hardens after mixing of the components, and results in a cement with open macroporosity enabling a rapid bone ingrowth.Type: GrantFiled: July 19, 2001Date of Patent: November 4, 2003Assignees: Stratec Medical AGInventor: Marc Bohner
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Patent number: 6639049Abstract: The invention relates to a process for the preparation of polymers stabilized with protective colloids in the form of water-redispersible powders or aqueous dispersions thereof having a reduced content of volatile components, by a) polymerizing by emulsion or suspension polymerization, one or more monomers from the group consisting of vinyl esters, (meth)acrylates, vinyl aromatics, olefins, 1,3-dienes and vinyl halides and optionally further monomers copolymerizable therewith, b) aftertreating the polymer dispersion thus obtained by means of postpolymerization, distillation, and/or introduction of steam or inert gas to obtain a residual content of volatile, nonaqueous components of <2000 ppm, and c) spray drying of aftertreated polymer dispersion to a residual content of volatile, nonaqueous components of <400 ppm, the dispersion being adjusted prior to spray drying to a solids content of <45% by weight before spraying, the spray drying performed with gas at an inlet temperature of >120° C.Type: GrantFiled: November 9, 2001Date of Patent: October 28, 2003Assignee: Wacker Polymer Systems & Co. KGInventor: Hans-Peter Weitzel
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Patent number: 6632869Abstract: A process for preparing copolymers based on vinyl esters and ethylene and, if desired, further comonomers in the form of their aqueous dispersions, having a solids content of greater than 65% and a Brookfield viscosity (20 s−1) of less than 10,000 mPa·s, by means of free-radically initiated polymerization of one or more monomers selected from vinyl esters and ethylene and, if desired, further monomers copolymerizable therewith, in the presence of one or more protective colloids, polymerization being conducted in the presence of from 2 to 15% by weight of seed latex, based on the amount of vinyl ester, said process comprising a) polymerizing without adding emulsifier, and in the presence of one or more polyvinyl alcohols protective colloids having a degree of hydrolysis of from 80 to 95 mol % and a Höppler viscosity in 4% strength aqueous solution of from 3 to 30 mPa·s, and b) introducing the seed latex in a fraction of from 30 to 75% by weight before beginning the polymerization andType: GrantFiled: July 16, 2001Date of Patent: October 14, 2003Assignee: Wacker Polymer Systems GmbH & Co. KGInventor: Hans-Peter Weitzel
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Patent number: 6616944Abstract: The invention is directed to self-assembling, polymer-based delivery systems for proteins. The delivery systems comprises an active agent and a polyol ester of the invention, having a linear polyol containing six or more hydroxyl groups as a central backbone and biodegradable hydroxy carboxylic ester groups attached to the central backbone.Type: GrantFiled: March 8, 2001Date of Patent: September 9, 2003Assignee: Medinnova Gesellschaft fur Medizinsche Innovationen aus Adkademischer Forschung mbHInventors: Thomas Kissel, Armin Breitenbach, Tobias Jung, Walter Kamm
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Patent number: 6607784Abstract: The present invention provides a method for preparing submicron sized particles of an organic compound, the solubility of which is greater in a water-miscible first solvent than in a second solvent which is aqueous, the process including the steps of (i) dissolving the organic compound in the water-miscible first solvent to form a solution, (ii) mixing the solution with the second solvent to define a pre-suspension; and (iii) adding energy to the pre-suspension to form particles having an average effective particle size of 400 nm to 2 microns.Type: GrantFiled: June 5, 2001Date of Patent: August 19, 2003Assignee: Baxter International Inc.Inventors: James E. Kipp, Joseph Chung Tak Wong, Mark J. Doty, Christine L. Rebbeck
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Patent number: 6608128Abstract: Polyvinyl alcohol compositions in the form of an aqueous solution are disclosed, where the aqueous polyvinyl alcohol compositions include: (i) polyvinyl alcohol; (ii) at least one polyaldehyde having at least 3 carbon atoms and being masked completely as a water-soluble hydrogen sulfite adduct; and (iii) at least one compound which is acidic in water. The aqueous polyvinyl alcohol compositions are suitable as adhesives and for use in cast films.Type: GrantFiled: April 13, 2000Date of Patent: August 19, 2003Assignee: Kuraray Specialities Europe GmbHInventors: Martin Jakob, Richard Gutte
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Patent number: 6593399Abstract: A method for preparing an intrinsically conductive copolymer comprising preparing an emulsion latex in a medium; forming a mixture which comprises at least one cyclic heteroatom containing monomer, the emulsion latex in the medium and an additive under first condition effective to maintain the emulsion latex in a first stabilized emulsion state, causing the monomer in the mixture to polymerize under second condition effective to produce the conductive copolymer in a second stabilized emulsion state. Additives include cyclodextrins, partially alkylated cyclodextrins, poly(vinyl alcohol), partially hydrolyzed poly(vinyl acetate), poly(vinyl acetate) and mixtures thereof.Type: GrantFiled: May 1, 2000Date of Patent: July 15, 2003Assignee: Rohm and Haas CompanyInventors: Edward Ewart La Fleur, Jiun-Chen Way
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Publication number: 20030125453Abstract: A polyvinyl alcohol copolymer latex composition comprises an intimate polymer composition obtained from 10% to 60% by weight of a substantially hydrolyzed low molecular weight polyvinyl alcohol (PVOH); 2% to 80% by weight of at least one diene; 2% to 80% by weight of at least one hydrophobic monomer other than a diene and optionally either up to 10% by weight of at least one hydrophilic ethylenically unsaturated acid monomer or up to 40% by weight of a cationic monomer. The copolymer latex composition can be prepared as an emulsion from an aqueous blend of the above listed monomers which are generally added at various stages during the polymerization and a free radical initiator, surfactants, and, if desirable, chain transfer agents. Up to 80% of the PVOH may be added after the monomers have been polymerized.Type: ApplicationFiled: December 19, 2002Publication date: July 3, 2003Inventors: Nick G. Triantafillopoulos, Carla B. Dittman McBain, I. John Westerman, Michael F. Richardson, William C. Floyd
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Patent number: 6573327Abstract: An aqueous solution of partially hydrolyzed vinyl ester resin having an excellent stability and useful particularly as a secondary agent for suspension polymerization of vinyl compounds, wherein the partially hydrolyzed vinyl ester resin has a degree of hydrolysis of at most 70% by mole, it is contained in a concentration of at most 50% by weight, and it satisfies the equation: 1n y>0.042x+1.0, in which y is the cloud point (° C.) of a 30% by weight aqueous solution of the partially hydrolyzed vinyl ester resin, and x is the degree of hydrolysis (% by mole) of the partially hydrolyzed vinyl ester resin.Type: GrantFiled: September 29, 1999Date of Patent: June 3, 2003Assignee: Nippon Gohsei Kagaku Kogyo Kabushiki KaishaInventor: Mitsuo Shibutani
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Publication number: 20030091811Abstract: Adhesives for bonding paper facings to aerated concrete provide increased manufacturing efficiencies and long term stability of constructs prepared therewith. Adhesives may advantageously be used in the foamed state.Type: ApplicationFiled: November 15, 2001Publication date: May 15, 2003Inventors: Ronald J. Skrzyniarz, Lisa Brown
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Patent number: 6552115Abstract: The present invention relates to a vinyl acetate based polymer latex composition obtained by emulsion polymerization, the polymer comprising PVOH, and a monomer mixture, said monomer mixture comprising vinyl acetate, and a pre-crosslinking monomer selected from one or more polyethylenically unsaturated compounds wherein said pre-crosslinking monomer is present in amount of less than 0.01% by weight based on the total monomer content and which pre-crosslinking monomer is initially charged to the polymerization reaction mixture. The invention further relates to use of the vinyl acetate based polymer latex in an adhesive, preferably a woodworking adhesive and to an adhesive, preferably a woodworking adhesive comprising said latex.Type: GrantFiled: October 17, 2000Date of Patent: April 22, 2003Assignee: Air Products Polymers, L.P.Inventors: Helmut Zecha, Rudolf Weissgerber, Frank Geiger
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Patent number: 6521701Abstract: A stable aqueous liquid polymer composition, which comprises: (i) at least one polyvinyl alcohol (PVA) which has an Ostwald viscosity less than 5 mPa·s corresponding to a degree of polymerization less than 600 and a molar percentage of hydrolysis ranging from 70 to 100 measured from the ester value (DIN 53401), corresponding to a molar percentage of vinyl acetate units from 30 to 0, and (ii) at least one water-soluble polymer at neutral or alkaline pH, the composition controlling the activation of optical brighteners, water retention and viscosities of paper coating colors.Type: GrantFiled: July 9, 2001Date of Patent: February 18, 2003Assignee: Coatex S.A.S.Inventors: Jean-Bernard Egraz, Georges Ravet, Jean-Marc Suau, Isabelle Capra-Ogier, Henri Grondin
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Patent number: 6495628Abstract: A process of the invention produces a vinyl acetate polymer based emulsion by seed polymerization of vinyl acetate in an ethylene-vinyl acetate copolymer based emulsion. This process includes a step of performing seed polymerization while adding vinyl acetate to a system, and, prior to or subsequent to the step, a step of adding a polymerizable unsaturated monomer other than vinyl acetate to the system. The amount of the polymerizable unsaturated monomer other than vinyl acetate is, for example, about 0.05 to 10 parts by weight relative to 100 parts by weight of vinyl acetate. At least one monomer selected from acrylic esters, methacrylic esters, vinyl esters, and vinyl ethers can be used as the polymerizable unsaturated monomer other than vinyl acetate.Type: GrantFiled: October 3, 2000Date of Patent: December 17, 2002Assignee: Konishi Co. Ltd.Inventors: Toshiki Origuchi, Shintaro Ogawa
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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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Patent number: 6475504Abstract: What is disclosed is a method for the formation of unique poly(vinyl alcohol) hydrogels, articles that are made from such hydrogels, unique odor-providing pest repellent compositions and their uses to repel pests.Type: GrantFiled: October 25, 1995Date of Patent: November 5, 2002Inventor: Howard Franklin Stewart
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Publication number: 20020156179Abstract: A stable aqueous liquid polymer composition, which comprises:Type: ApplicationFiled: February 6, 2002Publication date: October 24, 2002Applicant: COATEX S.A.Inventors: Jean-Bernard Egraz, Georges Ravet, Jean-Marc Suau, Isabelle Capra-Ogier, Henri Grondin
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Patent number: 6451899Abstract: The present invention relates to aqueous formulations comprising: i. at least one hydrophilic particulate polymer P1, as an aqueous dispersion, composed essentially of monoethylenically unsaturated monomers having a water-solubility in the range from 10 to 100 g/l (at 25° C. and 1 bar), and ii. at least one hydrophobic particulate polymer P2, as an aqueous dispersion, composed essentially of ethylenically unsaturated monomers having a water-solubility below 10 g/l (at 25° C. and 1 bar), the glass transition temperature Tg1 of the polymer P1 being less than 10 K different from the glass transition temperature Tg2 of the polymer P2.Type: GrantFiled: November 20, 2000Date of Patent: September 17, 2002Assignee: BASF AktiengesellschaftInventors: Cheng-Le Zhao, Uwe Dittrich, Joachim Roser, Joachim Pakusch, Harald Röckel
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Publication number: 20020128346Abstract: The present invention relates to a cell growth substrate polymer that is obtainable by polymerizing a polymerizable component comprising least one hydrophilic monomer or macromer which is devoid of a sulfo group, at least one sulfo-group-containing monomer, and optionally a crosslinker in a weight ratio as defined in the claims. The polymers of the invention are useful, for example, as substrates for the attachment and growth of mammalian cells and tissue and in particular as materials for the manufacture of biomedical devices and prostheses, including implanted devices.Type: ApplicationFiled: January 5, 2001Publication date: September 12, 2002Inventors: Angelika Maria Domschke, Vimala Mary Francis
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Patent number: 6448330Abstract: A highly stable aqueous emulsion of a polymer predominantly comprised of units of at least one monomer selected from acrylate esters, methacrylate esters, styrenic monomers and diene monomers, which is dispersion-stabilized with a water-soluble compound having a molecular weight of at least 300 and an alcoholic hydroxyl group; characterized by having an average particle diameter of 0.05-5 &mgr;m, a calcium chloride chemical stability index of at least 20 and a surface tension of at least 45 mN/m as measured at a solid content of 30 wt. %. The aqueous emulsion is produced by polymerizing a monomer or monomers in the presence of an alcohol and a polymerization initiator generating a peroxide free-radical in an aqueous medium, while the monomer or monomers and the alcoholic hydroxyl group-containing water-soluble compound are incorporated continuously or intermittently into a polymerization system.Type: GrantFiled: February 28, 2001Date of Patent: September 10, 2002Assignee: Zeon CorporationInventors: Toshihiro Inoue, Hidekazu Haneda
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Patent number: 6444728Abstract: The invention provides modeling lightweight dough comprising synthetic resin hollow microspheres having a particle diameter of 20 to 120 &mgr;m, polyvinyl alcohol, vinyl acetate resin, and water. The dough of the present invention is excellent in lightweight, formability, shape preservation of the modeled shape, and bending deformation resistance of the modeled product obtained by modeling and drying. The modeled product is long lasting.Type: GrantFiled: November 3, 2000Date of Patent: September 3, 2002Assignee: Padico Co., Ltd.Inventor: Noritada Yuyama
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Patent number: 6417252Abstract: A novel aqueous resin composition for use as a sealer is provided, including an aqueous resin as a major component, and a viscosity modifier adjusting the viscosity of the aqueous resin composition to a value ranging from 5,000 to 100,000 mPa·s, the aqueous resin being an aqueous emulsion polyolefin resin which comprises a polyolefin not containing chlorine as a constituent element while exhibiting a viscosity of 1,000 mPa·s or higher in a water-dispersed state having a solid resin content of 20% to 40% by weight.Type: GrantFiled: May 3, 2001Date of Patent: July 9, 2002Assignees: Fugilight Industrial Co. Ltd.Inventors: Teruyoshi Hiraoka, Ryoichi Yoshihara
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Patent number: 6410637Abstract: A waterborne coating composition for application to a donor member surface includes a resin binder, a conductive particle material, an additional particle material of either (1) graphite particles with a dispersant of polyacrylamide, polyethylene oxide, polyvinyl alcohol or mixtures thereof or (2) crosslinked polymer particles, and water. The waterborne coating composition exhibits superior stability and achieves suitable properties when coated upon a donor member surface, thereby permitting practical replacement of volatile organic components typically used in donor member coating compositions.Type: GrantFiled: November 28, 2000Date of Patent: June 25, 2002Assignee: Xerox CorporationInventors: Peter G. Odell, Richard D. Hunt, Thomas Thomson, Yvonne J. M. Groot, Jas Paul S. Dhillon, Michael F. Zona
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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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Publication number: 20020061365Abstract: The invention relates to aqueous emulsions, a process for the preparation and the use thereof.Type: ApplicationFiled: July 9, 1997Publication date: May 23, 2002Inventors: WOLFGANG GRAPE, RUDI STRACKE, FRANK ZILLMER, ARMAND DE MONTIGNY
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Patent number: 6391964Abstract: A system of aqueous nail polish compositions is provided, including base coat, color coat, and top coat formulations. The base coat formulation comprises aqueous emulsions of acrylic polymer and vinyl acetate/acrylic copolymer. The color coat formulation comprises an aqueous solution of polyurethane resin and a colorant in addition to aqueous emulsions of acrylic polymer and vinyl acetate/acrylic polymer. Finally, the top coat formulation comprises an aqueous emulsion of vinyl acetate/acrylic polymer and an aqueous solution of polyurethane resin. The aqueous nail polish formulations of the present invention are substantially non-flammable and non-toxic while providing comparable nail coverage, wearability, and stability to non-aqueous nail polishes. Further, the present formulations offer rapid dry times and may be readily applied to nails using conventional nylon brushes.Type: GrantFiled: October 2, 2000Date of Patent: May 21, 2002Inventor: Joseph John Tartaglia
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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: 6333379Abstract: Process for preparing antistatic acrylic polymers wherein the acrylic monomers are polymerized in suspension, said acrylic monomers contain dissolved the antistatic additives selected from the following ones: CnH2n+1CO—N(CH2CH2OH)2 (1) wherein n is an integer ranging from 9 to 13; Cn′H2n′+1N(CH2CH2OH)2 (2) wherein n′ is an integer ranging from 8 to 14; CH2(OR1)CH(OR2)CH2(OR3) or C(CH2OR1)(CH2OR2)(CH2OR3)(CH2OR4) (3) wherein R1, R2, R3, R4 equal to or different from each other, are H or R, wherein R is a saturated or unsaturated C12-C18 alkylcarboxylate, preferably saturated or monounsaturated C18.Type: GrantFiled: July 21, 1999Date of Patent: December 25, 2001Assignee: ELF Atochem S.A.Inventors: Cristiano De Marco, Fabio Giberti, Lorenzo Poggi
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Publication number: 20010031811Abstract: Describes durable coating compositions and a process for the preparation of durable, broad-band antireflective coatings on organic polymeric host materials and photochromic organic polymeric host materials. The coating compositions consist essentially of a silane monomer mixture comprising glycidoxyalkylalkoxysilane and alkylalkoxysilane(s) with or without tetraalkoxysilanes; water-soluble organic polymer; a leveling amount of nonionic surfactant; a solvating amount of lower aliphatic alcohol; a catalytic amount of water-soluble acid; and water. The coating compositions may optionally contain fluorinated silane(s). Also describes a process for preparing antireflective coatings comprising the steps of coating a polymeric host material with the durable coating composition; curing the coating; treating the cured coating with an aqueous acidic solution to produce a graded refractive index; removing residual acid; and further curing the coating.Type: ApplicationFiled: February 28, 2001Publication date: October 18, 2001Inventors: Huawen Li, Bhima R. Vijayendran
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Patent number: 6300403Abstract: A method for producing protective-colloid-stabilized polymers in the form of their aqueous polymer dispersions or in the form of powders which can be re-dispersed in water, wherein one or several monomers from the group made up of vinyl aromatics, 1.3 dienes, acrylic acid esters and methacrylic acid esters of alcohols with 1 to 15 C-atoms are polymerized in the presence of a combination of protective colloids consisting of one or several protective colloids from the group of hydrophobically modified, partly saponified polyvinyl esters which produce a surface tension of ≦40 mN/m as a 2% aqueous solution, and one or several protective colloids which produce a surface tension of >40 mN/m as a 2% aqueous solution.Type: GrantFiled: November 19, 1999Date of Patent: October 9, 2001Assignee: Wacker-Chemie GmbHInventors: Theo Mayer, Hans-Peter Weitzel, Reinhard Haerzschel, Thomas Bastelberger
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Patent number: 6297317Abstract: A stable aqueous liquid polymer composition, which comprises: (i) at least one polyvinyl alcohol (PVA) which has an Ostwald viscosity less than 5 mPa·s corresponding to a degree of polymerization less than 600 and a molar percentage of hydrolysis ranging from 70 to 100 measured from the ester value (DIN 53401), corresponding to a molar percentage of vinyl acetate units from 30 to 0, and (ii) at least one water-soluble polymer at neutral or alkaline pH, the composition controlling the activation of optical brighteners, water retention and viscosities of paper coating colors.Type: GrantFiled: November 10, 1999Date of Patent: October 2, 2001Assignee: Coatex S.A.Inventors: Jean-Bernard Egraz, Georges Ravet, Jean-Marc Suau, Isabelle Capra-Ogier, Henri Grondin
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Patent number: 6254980Abstract: A metal plate having a rust preventive organic layer, said rust-preventive organic layer being a colloid or micelle of a slightly water soluble organic corrosion inhibitor as an organic layer mixed with and dispersed in a matrix resin, its production process and a treatment liquid in which it is processed.Type: GrantFiled: June 16, 1998Date of Patent: July 3, 2001Assignee: Nippon Steel CorporationInventors: Kenichiro Tadokoro, Hiromasa Shoji, Tadashi Sakon, Ikuo Jitsuhara, Makoto Yamasaki
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Patent number: 6207734Abstract: An adhesive for applying to a creping surface in the process for dry creping tissue paper is disclosed. The adhesive comprises cationic starch and optionally a polyvinyl alcohol and a water-soluble, thermosetting, cationic polyamide-epihalohydrin resin. The adhesive provides high adhesion and doctorability for dry creping.Type: GrantFiled: February 24, 1999Date of Patent: March 27, 2001Assignee: The Procter & Gamble CompanyInventors: Kenneth Douglas Vinson, Howard Thomas Deason, Bart Steven Hersko
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Patent number: 6201062Abstract: The invention relates to a method of producing protective colloid free, aqueous dispersions of vinyl ester co-polymers by radical emulsion polymerization of 40 to 99.5 weight percent vinyl acetate, 0 to 40 weight percent of one or several alkenes, 0 to 40 weight percent of one or several monomers from the group consisting of vinyl esters of C6 to C12 alkyl carboxylic acids, and of (meth)acrylic-acid esters of alcohols with 1 to 12 C atoms and optionally, additional copolymerizable mono- or poly-ethylenically unsaturated monomers. Said method is characterized in that 0.1 to 5 weight percent of one or several emulsifiers are polymerized with a persulfate initiator in the presence of 0.5 to 20 weight percent mono- or poly-ethylenically unsaturated carboxylic acid amides or derivatives thereof. The invention also relates to a method for producing protective colloid-free dispersion powders by spray drying or freeze drying said dispersions.Type: GrantFiled: September 3, 1999Date of Patent: March 13, 2001Assignee: Wacker-Chemie GmbHInventors: Hans-Peter Weitzel, Reiner Figge, Robert Braunsperger
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Patent number: 6197865Abstract: A process for producing an aqueous emulsion having a solid content of 70% by weight or more, a viscosity of 5,000 mPa.s or less and containing an ethylene-vinyl acetate copolymer having 10-40% by weight of ethylene unit and 90-60% of by weight of vinyl acetate unit.Type: GrantFiled: July 1, 1998Date of Patent: March 6, 2001Assignee: Sumitomo Chemical Company, LimitedInventors: Tatsuya Koizumi, Tatsuo Mitsutake
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Patent number: 6197878Abstract: In a first aspect, the invention provides a diol latex composition comprising: (a) latex polymer particles comprising a residue of an ethylenically unsaturated monomer, wherein the latex polymer particles have a size below 1000 mn; (b) a surfactant; and (c) a continuous liquid phase comprising a diol component, wherein the diol component comprises from 60 to 100% by weight of the continuous phase, wherein the latex polymer particles are dispersed in the continuous phase.Type: GrantFiled: March 3, 1999Date of Patent: March 6, 2001Assignee: Eastman Chemical CompanyInventors: David Logan Murray, Allan Scott Jones, Douglas Weldon Carico, Jr.
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Patent number: 6191209Abstract: A mixture of a polyester, such as poly(ethylene terephthalate) PET, and a second polymer which is poly(vinyl alcohol) or an ethylene/vinyl alcohol copolymer when extrusion compounded exhibits a lower residual acetaldehyde content than does PET alone when similarly treated. The invention pertains to any polyester used in the manufacture of bottles or containers which in turn are used to store consumer materials, especially food, beverages and most especially water.Type: GrantFiled: June 26, 2000Date of Patent: February 20, 2001Assignee: Ciba Specialty Chemicals CorporationInventors: Stephen Andrews, Dario Lazzari, Paul Odorisio, Dirk Simon
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Patent number: 6187861Abstract: A process is provided for preparing crosslinkable binders in the form of the aqueous dispersions by polymerizing vinyl ester-olefin copolymers in the presence of protective colloid, which comprises polymerizing vinyl ester-olefin copolymers having a Tg of less than −10° C. by emulsion polymerization in the presence of a protective colloid based on (meth)acrylate polymers comprising from 80 to 95% by weight, based on the overall weight of the polymer, of acrylates or methacrylates of aliphatic alcohols of 1 to 12 carbon atoms and from 5 to 20% by weight, based on the overall weight of the copolymer, of ethylenically unsaturated monocarboxylic or dicarboxylic acids, the latter copolymer having a glass transition temperature Tg of from 60 to 120° C., and, after the end of polymerization, introducing the crosslinkable groups by reacting the carboxyl groups of the (meth)acrylate polymers with ethylenically unsaturated compounds comprising functions suitable for esterifying the carboxyl group.Type: GrantFiled: April 3, 1999Date of Patent: February 13, 2001Assignee: Wacker Chemie GmbHInventors: Hans-Peter Weitzel, Harald Zeh
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Patent number: 6127518Abstract: Method of producing dry polyvinyl acetate particles that are readily dispersible in water, are vinyl acetate monomer free and are useful for making polyvinyl acetate dispersion compositions that are low in odor, form clear dried films and may be used in adhesives, sealants, caulks and coatings. The method includes manufacturing an aqueous, e.g. water, dispersion of polyvinyl acetate containing polyvinyl alcohol; drying to remove volatiles by converting the dispersion to dry form under controlled temperature conditions and redispersing the dried polyvinyl acetate particles in an aqueous medium to form a polyvinyl acetate dispersion that is substantially free of vinyl acetate monomer.Type: GrantFiled: May 22, 1998Date of Patent: October 3, 2000Assignee: Elmer's Products, Inc.Inventors: Peter Spiros Columbus, Yogeshbhai Babubhai Patel
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Patent number: 6123871Abstract: Photoluminescence polymers, processes for preparing these novel photoluminescence polymers and methods for their use are provided. The photoluminescence polymers having one or more photoluminescence pigments dispersed in an aqueous solution of polyvinyl alcohol in the ratios from about 2:1 to 1:5 by weight. These novel photoluminescence polymers are moldable, non-toxic, non-radioactive, environmentally safe and have been found to be potent photoluminescence polymers that provide a bright after glow for extended periods of time up to 10 hours or more.Type: GrantFiled: January 11, 1999Date of Patent: September 26, 2000Inventor: Michael Lee Carroll
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Patent number: 6100359Abstract: The present invention relates to an ablative fire resistant hydrophilic polyurea foam made from low molecular weight polyols capped with an isocyanate, with the polyol mixture including a fire retardant polyol that preferably includes carborane disilanol, with the fire retardant polyol containing the carborane disilanol imparting superior fire retardancy characteristics. The present invention also relates to a prepolymer for forming the polyurea foam and the present invention especially relates to the use of a carborane disilanol fire retardant polyol. The present invention also relates to a method for forming the polyurea foam and the prepolymer.Type: GrantFiled: December 3, 1998Date of Patent: August 8, 2000Inventor: Sina Ghatan
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Patent number: 6054519Abstract: Polyvinyl alcohol compositions in the form of an aqueous solution are disclosed, where the aqueous polyvinyl alcohol compositions include: (i) polyvinyl alcohol; (ii) at least one polyaldehyde having at least 3 carbon atoms and being masked completely as a water-soluble hydrogen sulfite adduct; and (ii) at least one compound which is acidic in water. The aqueous polyvinyl alcohol compositions are suitable as adhesives and for use in cast films.Type: GrantFiled: September 5, 1997Date of Patent: April 25, 2000Assignee: Clariant GmbHInventors: Martin Jakob, Richard Gutte
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Patent number: 6034172Abstract: The invention relates to emulsifier mixtures for preparing water-soluble polymers by inverse emulsion polymerization of corresponding monomers or monomer mixtures, to a process for preparing the water-soluble polymers, and to the monomer/water-in-oil emulsions thus obtained. The emulsifier mixture comprises glycerol monooleate and one or more diacetyltartrates of fatty acid glyceride.Type: GrantFiled: December 21, 1998Date of Patent: March 7, 2000Assignee: Th. Goldschmidt AGInventors: Felix Muller, Gerd H. Dahms
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Patent number: 6011077Abstract: The invention relates to a novel process for the production of mouldings, in particular contact lenses, in which a crosslinkable polymer comprising units containing crosslinkable groups, units containing a bound photoinitiator and, if desired, units containing further modifiers is crosslinked in solution, and to mouldings, in particular contact lenses, obtainable by this process. The present invention likewise relates to novel crosslinkable polymers which can be employed in the process, in particular derivatives of a polyvinyl alcohol having a molecular weight of at least about 2000 which comprises from about 0.5 to about 80%, based on the number of hydroxyl groups in the polyvinyl alcohol, of units of the formula I ##STR1## in which the variables are as defined in the description, and units of the formula IV, as defined in the description, which contain a bound photoinitiator.Type: GrantFiled: September 12, 1997Date of Patent: January 4, 2000Assignee: Novartis AGInventor: Beat Muller
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Patent number: 6010590Abstract: A surface coating applied on a substrate as well as a method of preparing a surface coated substrate are provided. A mixture comprising about 40% polyvinyl acetate and about 60% polyvinyl alcohol is applied to a porous substrate. Then, the mixture is heated. The polyvinyl alcohol cures by evaporation, and the mixture separates into a hydrophilic layer of polyvinyl alcohol and a hydrophobic layer of polyvinyl acetate, and the hydrophilic layer is between the hydrophobic layer and the substrate. A water-soluble ink is then deposited into the surface coating, and the ink is generally repelled by the hydrophobic layer, and is generally absorbed by the hydrophilic layer. Additionally, the hydrophobic layer protects from fading the ink which is absorbed into the hydrophilic layer, causes the ink to spread less in the hydrophilic layer, allows a charge to be applied to the same side of the substrate on which the ink is deposited, and allows an enhanced surface charge to be applied.Type: GrantFiled: October 11, 1997Date of Patent: January 4, 2000Inventor: Ronald Cherkas
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Patent number: 5998529Abstract: The present invention provides a colorful coating material which consists essentially of a 10 to 40% of paint in weight, a 50 to 90% of talcum powder in weight and a 5 to 10% of volatile agent in weight. The paint, the talcum powder and the volatile agent are evenly mixed to form a plaster form coating mixture. The coating mixture is adapted for coating around an object by means of an extrusion mold to form a protective coating. When the protective coating is dried and solidified, a hard and durable protective coating shell is formed and wrapped around the object.Type: GrantFiled: February 26, 1998Date of Patent: December 7, 1999Inventor: Wei Chen
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Patent number: 5936020Abstract: A vinyl acetate-ethylene copolymer emulsion having a solids content of at least about 65 percent by weight comprises about 5 to 40 percent by weight ethylene; about 60 to 95 percent by weight vinyl acetate; greater than about 3.0 percent by weight of a polyvinyl alcohol having a degree of polymerization of from about 100 to 500; about 1 to about 4 percent by weight of an ethyoxylated aliphatic surfactant having an HLB of from about 16.5 to 18.0; and about 0.2 to about 1.0 weight percent of a dispersant.Type: GrantFiled: August 22, 1997Date of Patent: August 10, 1999Assignee: Reichhold Chemicals, Inc.Inventor: Yakov S. Freidzon
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Patent number: 5908877Abstract: A water dispersible powder composition is provided. The powder composition contains at least one film-forming polymer having at least one functional group and at least one reactive component that reacts to form a non-ionic bond with the polymer functional group following dispersion of the powder composition in water. The reaction between the polymer particles in the admixture and the reactive component renders the resulting coating water-resistant. The powder composition of this invention is useful for producing water-resistant coatings.Type: GrantFiled: May 7, 1997Date of Patent: June 1, 1999Inventors: Xiaohong Ci, David RIchard Amick, Richard Foster Merritt