Monomer Contains Two Or More Ester Groups Patents (Class 526/318.43)
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Patent number: 6818039Abstract: Biodegradable anionic polymers are disclosed which include recurring polymeric subunits preferably made up of dicarboxylic monomers such as maleic anhydride, itaconic anhydride or citraconic anhydride. Free radical polymerization is used in the synthesis of the polymers. The polymers maybe complexed with ions and/or mixed with fertilizers or seeds to yield agriculturally useful compositions. The preferred products of the invention may be applied foliarly or to the earth adjacent growing plants in order to enhance nutrient uptake by the plants.Type: GrantFiled: November 12, 2002Date of Patent: November 16, 2004Assignee: Specialty Fertilizer Products, LLCInventors: John Larry Sanders, Grigory Mazo, Jacob Mazo
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Patent number: 6806337Abstract: Disclosed are soft, high refractive index, acrylic device materials having improved strength. The materials contain cross-linked acrylate or methacrylate microspheres.Type: GrantFiled: July 15, 2003Date of Patent: October 19, 2004Assignee: AlconInventors: Douglas C. Schlueter, Albert R. LeBoeuf, Mutlu Karakelle
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Patent number: 6802993Abstract: A photochromic cured product which has excellent photochromism such as high color density and high fading speed, excellent adhesion to a hard coat and high striping work efficiency. This cured product is obtained by polymerizing and curing a curable composition which comprises (A) a polyfunctional polymerizable monomer such as trimethylolpropane trimethacrylate, (B) a silyl monomer such as &ggr;-methacryloyloxypropyl trimethoxysilane, (C) another radically polymerizable monomer and (D) a photochromic compound. As for the contents of the polymerizable monomers, the content of the component (A) is 1 to 50 wt %, the content of the component (B) is 0.5 to 20 wt % and the balance consists of the component (C) based on the total of the components (A), (B) and (C). The photochromic compound (D) is contained in an amount of 0.0001 to 10 parts by weight based on 100 parts by weight of the total of the components (A), (B) and (C).Type: GrantFiled: May 29, 2002Date of Patent: October 12, 2004Assignee: Tokuyama CorporationInventors: Junji Momoda, Toshiaki Otani
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Patent number: 6784249Abstract: There is a need for polymers that offer a high level of heat and ultraviolet light resistance. It is particularly critical for polymers that are utilized in making skin compounds for automotive instrument and door panels to display excellent heat and ultraviolet light resistance. Polymer blends having such characteristics can be made by blending certain rubbery polymers with halogen containing polymers, such as polyvinyl chloride (PVC). There is currently a demand for halogen-free polymers having such characteristics. This invention discloses a rubbery polymer that can be blended with polyolefins, such as polyethylene or polypropylene, to make leathery compositions having good heat and ultraviolet light resistance. The rubbery polymer of this invention is comprised of repeat units which are comprised of (a) butyl acrylate, (b) an alkoxyalkylene acrylate, (c) styrene, (d) a half ester maleate soap, and (e) a crosslinking agent.Type: GrantFiled: April 16, 2001Date of Patent: August 31, 2004Inventor: Hung Dang Ngoc
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Patent number: 6756461Abstract: Biodegradable anionic polymers are disclosed which include recurring polymeric subunits preferably made up of dicarboxylic monomers such as maleic anhydride, itaconic anhydride or citraconic anhydride. Free radical polymerization is used in the synthesis of the polymers. The polymers may be complexed with ions and/or mixed with fertilizers or seeds to yield agriculturally useful compositions. The preferred products of the invention may be applied foliarly or to the earth adjacent growing plants in order to enhance nutrient uptake by the plants.Type: GrantFiled: May 15, 2003Date of Patent: June 29, 2004Assignee: Specialty Fertilizer Products, LLCInventors: John Larry Sanders, Grigory Mazo, Jacob Mazo
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Patent number: 6753395Abstract: Biodegradable anionic polymers are disclosed which include recurring polymeric subunits preferably made up of dicarboxylic monomers such as maleic anhydride, itaconic anhydride or citraconic anhydride. Free radical polymerization is used in the synthesis of the polymers. The polymers may be complexed with ions and/or mixed with fertilizers or seeds to yield agriculturally useful compositions. The preferred products of the invention may be applied foliarly or to the earth adjacent growing plants in order to enhance nutrient uptake by the plants.Type: GrantFiled: June 4, 2003Date of Patent: June 22, 2004Assignee: Specialty Fertilizer Products, LLCInventors: John Larry Sanders, Grigory Mazo, Jacob Mazo
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Publication number: 20040097679Abstract: The reaction of a vinyl monomer (A), an unsaturated fatty acid hydroxyalkyl ester-modified polycaprolactone (B) and a radical polymerization initiator (I) in a continuously mixing reactor can provide a crosslinkable vinyl polymer (C) having a number average molecular weight of about 500 to about 10,000. A cured product thereof has a high elasticity and a high strength, and finds many applications, for example, paints, coating materials, adhesives and pressure-sensitive adhesives.Type: ApplicationFiled: April 9, 2003Publication date: May 20, 2004Inventor: Shuso Iyoshi
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Patent number: 6706837Abstract: Biodegradable anionic polymers are disclosed which include recurring polymeric subunits preferably made up of dicarboxylic monomers such as maleic anhydride, itaconic anhydride or citraconic anhydride. Free radical polymerization is used in the synthesis of the polymers. The polymers may be complexed with ions and/or mixed with fertilizers or seeds to yield agriculturally useful compositions. The preferred products of the invention may be applied foliarly or to the earth adjacent growing plants in order to enhance nutrient uptake by the plants.Type: GrantFiled: June 4, 2003Date of Patent: March 16, 2004Assignee: Specialty Fertilizer Products, LLCInventors: John Larry Sanders, Grigory Mazo, Jacob Mazo
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Patent number: 6703469Abstract: Biodegradable anionic polymers are disclosed which include recurring polymeric subunits preferably made up of dicarboxylic monomers such as maleic anhydride, itaconic anhydride or citraconic anhydride. Free radical polymerization is used in the synthesis of the polymers. The polymers may be complexed with ions and/or mixed with fertilizers or seeds to yield agriculturally useful compositions. The preferred products of the invention may be applied foliarly or to the earth adjacent growing plants in order to enhance nutrient uptake by the plants.Type: GrantFiled: March 5, 2001Date of Patent: March 9, 2004Assignee: Specialty Fertilizer Products, LLCInventors: John Larry Sanders, Grigory Mazo, Jacob Mazo
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Publication number: 20040014901Abstract: The invention relates to a cross-linked, water-swellable polymer that contains polymerized into it moieties of a) water-soluble, monoethylenically unsaturated monomers, and b) 0.001 to 5 mole % based on the monomers a) of a cross-linking combination, b1) a first cross-linking agent with at least two (meth)acrylic ester moieties in the molecule and b2) a second cross-linking agent with at least two (meth)allyloxy moieties in the molecule, the molar ratio of b1) to b2) ranging from 0.7:1 to 10:1. The polymer according to the invention has a balanced property profile as regards absorptivity, gel strength, absorption speed and extractable components and can be advantageously produced by a continuous method.Type: ApplicationFiled: August 8, 2003Publication date: January 22, 2004Inventors: Wilfried Heide, Stefan Wickel, Thomas Daniel, Uwe Stuven
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Patent number: 6667374Abstract: A high molecular weight water soluble acrylamide based polymer having improved flocculating and dewatering properties is provided. The polymer is prepared by a process in which a small quantity of a chain branching agent is added to the polymerization reaction mixture continuously or stepwise while the monomers are polymerized. The polymer is useful in solid/liquid separations such as flocculants and coagulants in wastewater treatment applications, and as thickening agents.Type: GrantFiled: March 13, 2002Date of Patent: December 23, 2003Assignee: Ecole Polytechnique Federal de LausanneInventors: Jose Hernandez-Barajas, Christine Wandrey, David Hunkeler
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Publication number: 20030225230Abstract: Polymer for antifouling coatings which comprises units corresponding to the following monomers: A) 5 to 100 mol. % of one or more compounds of general formula (I) in which R=H or CH3; X=O or S; R1=Ph(R2)m, —C(H)3−(p+q)(CO—R)3p(COOR3)q, —(CH2)n−(CO)t—COOR3 or optionally substituted thiadiazolyl and thiazolylsulfamyl groups; Ph=phenyl; m=1-3; p=0-3; q=0-3; p+q=1-3; s=0 or 1; t=0 or 1; R2=each independently selected from halogen, —C(O)H, —COOR3, —CH2—COOR3, —O—R3 , —NH COOR3, —NH—CO—R3 and —NH2; R3=II or optionally halogen substituted alkyl, aryl, cycloalkyl, aralkyl groups with 1-10 C atoms; and B) 0 to 95 mol. % of one or more other ethylenically unsaturated compound.Type: ApplicationFiled: December 8, 2000Publication date: December 4, 2003Applicant: Jotun A/SInventors: Thoralv Undrum, Marianne Terland Nilsen, Marit Dahling
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Patent number: 6624274Abstract: The present invention provides a polymer composition capable of being cured or crosslinked in the absence or without the use of conventional sulfur and accelerator cure systems. The polymer is formed from olefinically unsaturated monomers and includes at least one conjugated diene monomer. Such polymer includes additional functionality provided by a chelating monomer.Type: GrantFiled: November 9, 2000Date of Patent: September 23, 2003Assignee: Dow Reichhold Specialty Latex LLCInventor: Kevin Grant Suddaby
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Patent number: 6596831Abstract: Biodegradable anionic polymers are disclosed which include recurring polymeric subunits preferably made up of vinylic and dicarboxylic monomers such as vinyl acetate or vinyl alcohol and maleic anhydride, itaconic anhydride or citraconic anhydride, or combinations thereof. Free radical polymerization is used in the synthesis of the polymers, which are then hydrolyzed to replace ester groups with alcohol groups. The polymers may be complexed with ions and/or mixed with fertilizers or seed to yield agriculturally useful compositions. The preferred products of the invention may be applied foliarly, to seeds, to fertilizer, or to the earth adjacent growing plants in order to enhance nutrient uptake by the plants.Type: GrantFiled: December 18, 2001Date of Patent: July 22, 2003Inventors: John Larry Sanders, James Michael Kimmerly, Grigory Mazo
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Publication number: 20030125444Abstract: A dental resin composition is disclosed, comprising a polycarbonate-modified diphenoxy diacrylate having a monomer structure (I): 1Type: ApplicationFiled: November 4, 2002Publication date: July 3, 2003Inventors: Weitao Jia, Shuhua Jin
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Patent number: 6552140Abstract: An air-activatable polymerisable composition useful, in the field of adhesives, sealants, surface coatings, moulding resins and composite matrices, comprises: a) at least one free-radically polymerisable monomer, b) an activator system for effective polymerisation of the free-radically polymerisable monomer, said activator system comprising at least one auto-oxidisable compound which is a beta diketone, c) a soluble ionic salt, particularly a transition metal salt, d) and a weak acid or a latent weak acid, with the proviso that the composition does not contain a peroxide, or a peroxide precursor which produces peroxide in the absence of air, or any ingredient which is a significant source of radicals in the absence of air.Type: GrantFiled: March 16, 2001Date of Patent: April 22, 2003Assignee: Loctite (R&D) LimitedInventors: Brendan J. Kneafsey, Rory B. Barnes
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Patent number: 6525155Abstract: Biodegradable anionic polymers are disclosed which include recurring polymeric subunits preferably made up of vinylic and dicarboxylic monomers such as vinyl acetate or vinyl alcohol and maleic anhydride, itaconic anhydride or citraconic anhydride, or combinations thereof. Free radical polymerization is used in the synthesis of the polymers, which are then hydrolyzed to replace ester groups with alcohol groups. The polymers may be complexed with ions and/or mixed with fertilizers or seed to yield agriculturally useful compositions. The preferred products of the invention may be applied foliarly, to seeds, to fertilizer, or to the earth adjacent growing plants in order to enhance nutrient uptake by the plants.Type: GrantFiled: December 12, 2001Date of Patent: February 25, 2003Inventors: John Larry Sanders, James Michael Kimmerly, Grigory Mazo
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Patent number: 6518382Abstract: Biodegradable anionic polymers are disclosed which include recurring polymeric subunits preferably made up of vinylic and dicarboxylic monomers such as vinyl acetate or vinyl alcohol and maleic anhydride, itaconic anhydride or citraconic anhydride, or combinations thereof. Free radical polymerization is used in the synthesis of the polymers, which are then hydrolyzed to replace ester groups with alcohol groups. The polymers may be complexed with ions and/or mixed with fertilizers or seed to yield agriculturally useful compositions. The preferred products of the invention may be applied foliarly, to seeds, to fertilizer, or to the earth adjacent growing plants in order to enhance nutrient uptake by the plants.Type: GrantFiled: December 13, 2001Date of Patent: February 11, 2003Inventors: John Larry Sanders, James Michael Kimmerly, Grigory Mazo
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Patent number: 6515091Abstract: Biodegradable anionic polymers are disclosed which include recurring polymeric subunits preferably made up of vinylic and dicarboxylic monomers such as vinyl acetate or vinyl alcohol and maleic anhydride, itaconic anhydride or citraconic anhydride, or combinations thereof. Free radical polymerization is used in the synthesis of the polymers, which are then hydrolyzed to replace ester groups with alcohol groups. The polymers may be complexed with ions and/or mixed with fertilizers or seed to yield agriculturally useful compositions. The preferred products of the invention may be applied foliarly, to seeds, to fertilizer, or to the earth adjacent growing plants in order to enhance nutrient uptake by the plants.Type: GrantFiled: April 30, 2001Date of Patent: February 4, 2003Inventors: John Larry Sanders, James Michael Kimmerly, Grigory Mazo
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Patent number: 6515090Abstract: Biodegradable anionic polymers are disclosed which include recurring polymeric subunits preferably made up of vinylic and dicarboxylic monomers such as vinyl acetate or vinyl alcohol and maleic anhydride, itaconic anhydride or citraconic anhydride, or combinations thereof. Free radical polymerization is used in the synthesis of the polymers, which are then hydrolyzed to replace ester groups with alcohol groups. The polymers may be complexed with ions and/or mixed with fertilizers or seed to yield agriculturally useful compositions. The preferred products of the invention may be applied foliarly, to seeds, to fertilizer, or to the earth adjacent growing plants in order to enhance nutrient uptake by the plants.Type: GrantFiled: May 1, 2000Date of Patent: February 4, 2003Inventors: John Larry Sanders, James Michael Kimmerly, Grigory Mazo
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Patent number: 6515092Abstract: Biodegradable anionic polymers are disclosed which include recurring polymeric subunits preferably made up of vinylic and dicarboxylic monomers such as vinyl acetate or vinyl alcohol and maleic anhydride, itaconic anhydride or citraconic anhydride, or combinations thereof. Free radical polymerization is used in the synthesis of the polymers, which are then hydrolyzed to replace ester groups with alcohol groups. The polymers may be complexed with ions and/or mixed with fertilizers or seed to yield agriculturally useful compositions. The preferred products of the invention may be applied foliarly, to seeds, to fertilizer, or to the earth adjacent growing plants in order to enhance nutrient uptake by the plants.Type: GrantFiled: December 17, 2001Date of Patent: February 4, 2003Inventors: John Larry Sanders, James Michael Kimmerly, Grigory Mazo
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Patent number: 6506860Abstract: A new and novel linear, regio-regular vicinal functionalized polymer methods of forming the same are described. The polymer has a linear hydrocarbon polymer backbone with vicinal functional groups having oxygen and/or nitrogen atom containing groups, such as hydroxy, carboxylic acid or ester, carbonyl acetate, amide, nitrile and the like, pendent from the polymer backbone chain in a regio-regular manner.Type: GrantFiled: September 28, 2000Date of Patent: January 14, 2003Assignee: Cryovac, Inc.Inventors: Donald Albert Bansleben, Truc-Chi Thi Huynh-Tran, Rusty Lew Blanski, Paul Anthony Hughes, William Peyton Roberts, Robert Howard Grubbs, Galen Richard Hatfield
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Publication number: 20020193546Abstract: A process for producing a substantially dry polymer particle powder. A mixture of polymerization reagents is formed from a mixture of at least one monomer source and a solvent selected from the group consisting essentially of water and organic solvents and an initiator source. The mixture of polymerization reagents is sprayed into a heated, controlled atmosphere, forming droplets of the mixture which are allowed to fall through the heated, controlled atmosphere for a sufficient period of time to obtain a desired degree of polymerization. The solvent is continuously evacuated from the atmosphere during the polymerization process.Type: ApplicationFiled: May 31, 2002Publication date: December 19, 2002Applicant: Waterguard Telecommunications Technologies, Inc. a Texas CorporationInventors: Clarence S. Freeman, Matthew Max Freeman, Jon Joseph Freeman
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Patent number: 6447926Abstract: The present invention provides paper coating slips comprising a low-crosslink copolymer as their binder.Type: GrantFiled: February 1, 2001Date of Patent: September 10, 2002Assignee: BASF AktiengesellschaftInventors: Jürgen Schmidt-Thümmes, Thomas Wirth, Stefan Kirsch
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Publication number: 20020102425Abstract: The invention relates to solvent-based coating compositions, comprising at least one hydroxy-functional (meth)acrylic copolymer I having an OH-value from 40 to 260 mg KOH/g, and a number average molecular mass (Mn) from 1,300 to 20,000 g/mol, which comprise the following polymerized components:Type: ApplicationFiled: December 4, 2000Publication date: August 1, 2002Inventors: Ann Delmotte, Josef Huybrechts, Ann Vaes, Harald Paulussen
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Patent number: 6426373Abstract: Among other things, a photopolymerizing one-component dental material is prepared, containing: 1) 80-10 weight-% of at least one polyfunctional urethane methacrylate and/or at least one polyfunctional urethane acrylate, 2) 10-30 weight-% of at least one polyfunctional acrylate resin, 3) 10-30 weight-% of at least one reactive thinner, 4) 0-20 weight-% of bis-GMA and/or at least one ethoxylated bisphenol-A-dimethacrylate, 5) 0-10 weight-% of at least one filler, 6) 0-1 weight-% of at least one photoinitiator, and. 7) 0-1 weight-% of at least one color pigment.Type: GrantFiled: August 12, 1999Date of Patent: July 30, 2002Assignee: Heraeus Kulzer GmbH & Co. KGInventors: Frank Stange, Albert Erdrich, Novica Savic, Teresa Puchalska
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Patent number: 6399730Abstract: A process for producing a substantially dry polymer particle powder. A mixture of polymerization reagents is formed from a mixture of at least one monomer source and a solvent selected from the group consisting essentially of water and organic solvents and an initiator source. The mixture of polymerization reagents is sprayed into a heated, controlled atmosphere, forming droplets of the mixture which are allowed to fall through the heated, controlled atmosphere for a sufficient period of time to obtain a desired degree of polymerization. The solvent is continuously evacuated from the atmosphere during the polymerization process.Type: GrantFiled: December 21, 2000Date of Patent: June 4, 2002Assignee: Waterguard Telecommunications Technologies, Inc.Inventors: Clarence S. Freeman, Matthew Max Freeman, Jon Joseph Freeman
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Patent number: 6395822Abstract: This invention relates to a liquid coating composition that is thermally-curable in the presence of oxygen, comprising: a monomer or oligomer containing two or more acrylate and/or methacrylate functional groups; an azo initiator; and oxygen. This invention also relates to a process for coating a substrate comprising the steps of applying a thin film of the foregoing coating composition to said substrate; and heating said coating composition at an effective temperature for an effective period of time to cure said coating composition, said applying and heating steps being conducted in the presence of oxygen.Type: GrantFiled: December 17, 1999Date of Patent: May 28, 2002Inventor: Garry J. Edgington
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Patent number: 6379599Abstract: The invention relates to a process for the preparation of molecularly imprinted polymers useful for separation of enzymes, which comprises the steps of reacting a complex of enzyme and affinity monomer, a comonomer and a crosslinker, with a polymerization initiator and a polymerization accelerator at ambient temperature and pressure for a period ranging between 2 to 24 hrs, thereby obtaining a crosslinked polymer, crushing the cross linked polymer obtained to fine particles, adding a solvent and extracting imprinted enzyme from the polymer, obtaining the molecularly imprinted polymer, contacting the imprinted polymer with aqueous solution containing imprinted enzyme or a mixture of imprinted enzyme and other enzymes and isolating the enzyme-adsorbed polymer.Type: GrantFiled: January 10, 2000Date of Patent: April 30, 2002Assignee: Council of Scientific and Industrial ResearchInventors: Alankar Arun Vaidya, Bhalchandra Shripad Lele, Mohan Gopalkrishna Kulkarni, Raghunath Anant Mashelkar
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Patent number: 6376600Abstract: Aqueous dispersion of copolymers formed by the polymerization of a monomer mixture containing 0.05% to less than 4.5% by weight of certain terminally unsaturated oligomers are useful for improving the scrub resistance, corrosion resistance, opacifying capacity and/or efflorescence resistance of a coating.Type: GrantFiled: December 11, 2000Date of Patent: April 23, 2002Assignee: Rohm and Haas CompanyInventors: Robert David Solomon, Bradley Keith Hageman, Leo Joseph Procopio, Margo Raate Schaefer, Gary David Greenblatt, Stephen Scott Edwards, Gary Robert Larson, Alvin Michael Maurice, Stewart Orlyn Williams, Patricia Marie Lesko, Peter Reeves Sperry
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Publication number: 20020035289Abstract: The &bgr;-hydroxy carbamate, ethylenically unsaturated monomer of the invention can be polymerized as a homopolymer or copolymerized with other monomers. The polymerization can be carried out in an aqueous medium. The &bgr;-hydroxy carbamate monomer is polymerized to form water-soluble homopolymers or, if polymerized as a mixture with one or more comonomers, copolymers that are soluble, emulsifiable, or dispersible in water. The &bgr;-hydroxy carbamate monomer can be used as a replacement monomer for acrylamide.Type: ApplicationFiled: October 4, 2001Publication date: March 21, 2002Inventors: Ohrbom H. Walter, Patricia A. Herrel
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Patent number: 6329483Abstract: A copolymer obtainable by free-radical polymerization of A) 50-99.99% by weight of an olefinically unsaturated C3-C5 monocarboxylic acid, of an olefinically unsaturated C4-C8 dicarboxylic acid or the anhydride thereof or a mixture of such carboxylic acids or anhydrides with B) 0.01-50% by weight of an olefinically unsaturated quaternary ammonium compound of the formula I or II where R1 is C6-C20-alkyl, C6-C20-alkenyl, C5-C8-cycloalkyl, phenyl, phenyl(C1-C12-alkyl) or (C1-C12-alkyl)phenyl, R2 is hydrogen, methyl or phenyl, R3 and R4 are each H or C1-C4-alkyl, X is halogen, C1-C4-alkoxysulfonyloxy or C1-C4-alkanesulfonate, it also being possible for the latter to occur as R3 or R4 with the formation of a betaine structure, Y is O or NH, and A is C1-C6-alkylene, or a mixture of such ammonium compounds, C) 0 to 49.Type: GrantFiled: September 29, 1994Date of Patent: December 11, 2001Assignee: BASF AktiengesellschaftInventors: Christian Schade, Axel Sanner, Hans-Ulrich Wekel, Franz Frosch, Horst Westenfelder
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Publication number: 20010044514Abstract: The present invention provides a process for the direct synthesis of high melting polymers made from dimeric cyclic esters. In particular, the present invention provides a process for synthesis of polylactic acid (PLA) from racemic materials such as racemic lactide and polymandelide from mandelide. The process further provides racemic metal organic ligand catalysts such as racemic salbinap that catalyzes the polymerization of racemic dimeric cyclic ester monomers to a polylactide stereocomplex. Polymandelide and mixed dimeric cyclic esters are also prepared in the presence of low amounts of water.Type: ApplicationFiled: December 13, 2000Publication date: November 22, 2001Applicant: Board of Trustees operating Michigan State UniversityInventors: Gregory L. Baker, Milton R. Smith
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Patent number: 6306982Abstract: General purpose inherently tacky acrylic pressure sensitive adhesive polymers formed of alkyl acrylates, vinyl esters, diesters of dicarboxylic acid and saturated carbocylic acids, having improved properties, a lower residual monomer content and a reduced polymerization time are formed by a sequential polymerization process in which 50 to 95 percent, typically 90 percent, of the monomers are incrementally added to a reactor as a first charge containing substantially all of the vinyl esters, preferably all of the diesters of dicarboxylic acid, the balance of the monomers being fed in a second incremental charge.Type: GrantFiled: July 31, 1997Date of Patent: October 23, 2001Assignee: Avery Dennison CorporationInventors: Ivan S. P. Lee, Charles R. Williams, Colin C. Smith, James R. Bodwell, James P. Akeley
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Patent number: 6242552Abstract: General purpose permanent, environmentally benign, pressure-sensitive adhesives and self-adhesive postage stamps and other laminate constructions are provided. In one embodiment, the PSA is an inherently, acrylic copolymer prepared by emulsion polymerization of 27 to 29% di-(2-ethylhexyl) maleate, 19 to 21% vinyl acetate, 40 to 43% ethylhexyl acrylate, 5 to 10% methyl methacrylate, 1% acrylic acid, and 1% methacrylic acid. Notably, no multifunctional monomers having a cyanurate or phosphate moiety are included in the polymer, and the polymer is substantially uncrosslinked.Type: GrantFiled: November 19, 1999Date of Patent: June 5, 2001Assignee: Avery Dennison CorporationInventor: Shiaonung Su
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Patent number: 6174978Abstract: The invention provides a production process of a water-absorbent resin, by which process the polymerization temperature can be controlled in static aqueous solution polymerization. The production process of a water-absorbent resin comprises the step of polymerizing statically an aqueous solution with a thickness of 10˜50 mm including a hydrophilic monomer, and is characterized in that the polymerization heat is removed using both cooling due to heat conduction transfer and cooling due to the latent heat of vaporization, thereby controlling the maximum attained temperature of the polymerization system in the range of 60˜95°C. or controlling the increase in solid content in the range of 0.2 to 10 weight %.Type: GrantFiled: November 20, 1998Date of Patent: January 16, 2001Assignee: Nippon Shokubai Co., Ltd.Inventors: Takumi Hatsuda, Takashi Namba, Yoshihiro Motono