Material Contains Polypeptide, E.g., Protein, Gelatin, Etc. Patents (Class 526/199)
-
Patent number: 10138309Abstract: A method for producing a particulate polymer includes polymerizing a monomer having a vinyl group in an aqueous solvent in the presence of a surfactin salt and a polymerization initiator, wherein a concentration of the surfactin salt in a polymerization reaction liquid is adjusted depending on a target particle diameter of the particulate polymer.Type: GrantFiled: August 1, 2017Date of Patent: November 27, 2018Assignees: KANEKA CORPORATION, National University Corporation Kobe UniversityInventors: Takuto Nagano, Katsumi Yamaguchi, Hideto Minami
-
Patent number: 9617364Abstract: The present invention relates to a method of preparing a vinyl chloride polymer having good thermal stability due to the restraint of dehydrochlorination by heat or ultraviolet rays, and a vinyl chloride polymer prepared thereby. In the preparation method, a modifier is introduced at the end of a polymerization process to impart the vinyl chloride polymer with high thermal stability without inducing modification. Therefore, the generation of dehydrochlorination due to heat or ultraviolet rays may be markedly restrained, thermal stability may be improved, and discoloration or the modification of physical properties may be prevented in the vinyl chloride polymer thus prepared.Type: GrantFiled: September 14, 2015Date of Patent: April 11, 2017Assignee: LG Chem, Ltd.Inventors: Kyung Seog Youk, Kyung Hyun Kim, Hyun Min Lee, Yong Jin Kim, Heung Kwon Bae, Jung Rae Lee
-
Patent number: 9587052Abstract: The present invention relates to a method of preparing a vinyl chloride polymer having good thermal stability due to the restraint of dehydrochlorination by heat or ultraviolet rays, and a vinyl chloride polymer prepared thereby. In the preparation method, a modifier is introduced at the end of a polymerization process to impart the vinyl chloride polymer with high thermal stability without inducing modification. Therefore, the generation of dehydrochlorination due to heat or ultraviolet rays may be markedly restrained, thermal stability may be improved, and discoloration or the modification of physical properties may be prevented in the vinyl chloride polymer thus prepared.Type: GrantFiled: September 14, 2015Date of Patent: March 7, 2017Assignee: LG Chem, Ltd.Inventors: Kyung Seog Youk, Kyung Hyun Kim, Hyun Min Lee, Yong Jin Kim, Heung Kwon Bae, Jung Rae Lee
-
Patent number: 9329186Abstract: The present invention relates to a method of separating or extracting phosphorylated amino acids, peptides or proteins with a molecularly imprinted polymer and to the preparation of said molecularly imprinted polymer as well as use of a molecularly imprinted polymer for separating or extracting phosphorylated amino acids, peptides or proteins.Type: GrantFiled: November 11, 2008Date of Patent: May 3, 2016Assignee: MIP Technologies ABInventors: Börje Sellergren, Marco Emgenbroich, Andrew J. Hall
-
Publication number: 20150105487Abstract: This invention relates to no-salt and mixed salt suspension polymerization processes for water-soluble monomers and resins and relates to catalysts produced from the same.Type: ApplicationFiled: June 7, 2013Publication date: April 16, 2015Applicant: ROHM AND HAAS COMPANYInventors: Takashi Masudo, Robert J. Olsen, Garth R. Parker, Jr., Jose A. Trejo
-
Publication number: 20130330384Abstract: The present invention concerns molecularly imprinted polymers (MIPs) having an affinity for natriuretic peptides, such as atrial natriuretic peptide (ANP). In some embodiments, the MIP is a nanoparticle (a molecularly imprinted polymeric nanoparticle (MIPNP)). Other aspects of the invention include methods of preparing an MIP having affinity for a natriuretic peptide, methods for binding a natriuretic peptide in vitro or in vivo using an MIP of the invention, methods for interfering with the binding of a natriuretic peptide with its receptor in vivo, methods for reducing inflammation, cell growth, cell differentiation, or a cell proliferation disorder, methods for detecting natriuretic peptides, and devices and kits for sequestering and/or detecting natriuretic peptides.Type: ApplicationFiled: February 24, 2012Publication date: December 12, 2013Applicant: UNIVERSITY OF SOUTH FLORIDAInventors: Subhra Mohapatra, Chunyan Wang
-
Publication number: 20120100358Abstract: The invention relates to a method for preparing molecular imprint polymers (MIP) by radical polymerisation that uses at least one primer including at least two chemical functions capable of forming reactive radicals, thereby providing a locally high radical concentration for priming the polymerisation on or about the imprint entity or molecule. The invention also relates to molecular imprint polymers (MIP) that can be obtained by the method of the invention, and to the use thereof in the production of biomimetic biosensors, biomimetic biochips, chemical sensors, specific adsorption separation devices, as a coating, particularly for releasing active ingredients.Type: ApplicationFiled: September 1, 2009Publication date: April 26, 2012Applicant: Universite De Technologie De Compiegne - UTCInventors: Karsten Haupt, Arnaud Cutivet, Jeanne Bernadette Tse Sum Bui, Pinar Cakir
-
Publication number: 20120095176Abstract: The present invention relates to a process for the production of polyvinyl chloride (PVC) having a median grain size of from 10 to 80 ?m by suspension polymerization of vinyl chloride, the process comprising the following process steps: (a) introduction of water, initiator(s), optionally one or more further adjuvants, and some of the vinyl chloride into a container as initial charge and mixing of the constituents; (b) dispersion, and addition of one or more suspension auxiliaries with continued dispersion; (c) heating of the mixture; (d) addition of the remaining vinyl chloride; and (e) working-up of the product.Type: ApplicationFiled: September 22, 2011Publication date: April 19, 2012Applicant: Vinnolit GmbH & Co. KGInventors: Johann Hiermeier, Ulrich Lauter, Peter Voth
-
Publication number: 20110294189Abstract: Methods for producing biomolecule-polymer conjugates, such as polypeptide-polymer conjugates, include attachment of an initiator agent to a biomolecule and in situ polymerization of a polymer from defined sites on the biomolecule. The conjugates may have desirable pharmacological properties and may be used therapeutically.Type: ApplicationFiled: February 17, 2010Publication date: December 1, 2011Applicant: DUKE UNIVERSITYInventors: Ashutosh Chilkoti, Weiping Gao
-
Patent number: 8022155Abstract: The invention relates to polymerizable compositions which comprise 10-80% by weight of a reactive diluent based on acrylic acid or methacrylic acid derivatives, and 10-50% by weight of a monomer of the indicated chemical formula which is liquid or which can be dissolved in the formulation. The formula may contain amino acid residues or peptide sequences, especially such that are specific of the collagen. These structural elements allow the enzymatic degradation of the polymers of the inventive composition.Type: GrantFiled: April 10, 2006Date of Patent: September 20, 2011Assignee: Technische Universitat WienInventors: Robert Liska, Monika Schuster, Jürgen Stampfl, Heinrich Gruber, Franz Varga
-
Patent number: 7985818Abstract: Methods for removing safrole from a sample, molecular imprinted copolymers that bind safrole, and methods of making the same are provided.Type: GrantFiled: April 10, 2006Date of Patent: July 26, 2011Assignee: R.J. Reynolds Tobacco CompanyInventor: Svetlana I. Pertsovich
-
Patent number: 7741421Abstract: The methods for producing macromolecule identifying polymers according to the present invention comprise the steps of polymerizing a starting monomer in an aqueous solution in the presence of a macromolecule, a crosslinking agent, and a radical polymerization initiator to produce a polymer containing the macromolecule in its interior; and removing the macromolecule from the polymer containing the macromolecule to thereby produce the macromolecule identifying polymer having a molecular imprint of the macromolecule. In this method, the crosslinker has a solubility in water at 25° C. of 100% by mass or higher.Type: GrantFiled: March 5, 2004Date of Patent: June 22, 2010Assignee: Reqmed Company, Ltd.Inventors: Norihiko Minoura, Alexandre Rachkov, Tadashi Matsumoto, Kaori Endo, Hu Minjie
-
Publication number: 20090270550Abstract: A process is disclosed wherein ricinoleic acid from petroleum alternative vegetable castor oil that has a hydroxyl group at the 12-position or a derivative thereof (an ester or a hydrogenated compound thereof) is polymerized in the presence of a synthetic zeolite and an immobilized lipase at around normal temperature without using any harmful polymerization catalysts or organic solvents which can cause environmental pollution whereby a polyester useful in the industry that has a weight average molecular weight of 20,000 or more is obtained. This high-molecular weight polyester is crosslinked to give a crosslinked elastomer that is comparable to synthetic rubbers.Type: ApplicationFiled: September 4, 2007Publication date: October 29, 2009Inventors: Hiroki Ebata, Shuichi Matsumura
-
Publication number: 20080051539Abstract: A curable binder composition comprising an emulsion polymer, an extender and a hydryoxyamide.Type: ApplicationFiled: June 19, 2007Publication date: February 28, 2008Inventor: Michael D. Kelly
-
Patent number: 7332553Abstract: The present invention refers to new classes of polymerisable monomers, to molecularly imprinted polymers obtainable by polymerisation of at least one of the monomers and a crosslinking monomer in the presence of a template molecule. The obtained polymers may be used for separation of enantiomers, diastereomers of the template molecule, and also for separation of the template molecule or template molecule analogues from structurally related compounds.Type: GrantFiled: November 15, 2006Date of Patent: February 19, 2008Assignee: MIP Technologies ABInventors: Börje Sellergren, Andrew Hall, Karine Chenon, Rohini Karmalkar
-
Patent number: 7208557Abstract: The present invention refers to new classes of polymerisable monomers, to molecularly imprinted polymers obtainable by polymerisation of at least one of the monomers and a crosslinking monomer in the presence of a template molecule. The obtained polymers may be used for separation of enantiomers, diastereomers of the template molecule, and also for separation of the template molecule or template molecule analogues from structurally related compounds.Type: GrantFiled: December 23, 2004Date of Patent: April 24, 2007Assignee: MIP Technologies ABInventors: Börje Sellergren, Andrew Hall, Karine Chenon, Rohini Karmalkar
-
Patent number: 6870021Abstract: The present invention refers to new classes of polymerisable monomers, to molecularly imprinted polymers obtainable by polymerisation of at least one of the monomers and a cross linking monomer in the presence of a template molecule. The obtained polymers may be used for separation of enantiomers, diastereomers of the template molecule, and also for separation of the template molecule or template molecule analogues from structurally related compounds.Type: GrantFiled: January 25, 2001Date of Patent: March 22, 2005Assignee: MIP Technologies ABInventors: Börje Sellergren, Andrew Hall, Karine Chenon, Rohini Karmalkar
-
Patent number: 6867273Abstract: Vinylidene fluoride polymers, characterized in that they are thermoplastic vinylidene fluoride/chlorotrifluoroethylene/hexafluoropropylene terpolymers and in that they contain at least 70% vinylidene fluoride, process for obtaining them and use thereof.Type: GrantFiled: July 26, 2001Date of Patent: March 15, 2005Assignee: Solvay (Societe Anonyme)Inventors: Thierry Lannuzel, Vincent Meunier, Régis Faig, Olivier Vidberg
-
Patent number: 6849701Abstract: A droplet polymerization process is provided to create efficacious molecularly imprinted polymers (MIPs). Such imprinted polymers have increased surface area for adsorptive or catalytic reactions. This method provides for monomer-template interactions in the absence of a suspending medium, thereby permitting formation of MIPs with increased template selectivity and substantial processing advantages. The process is particularly useful for separating isoflavones from soy whey.Type: GrantFiled: May 10, 2002Date of Patent: February 1, 2005Assignee: E. I. du Pont de Nemours and CompanyInventor: Tucker Norton
-
Patent number: 6759488Abstract: The invention refers to a molecularly imprinted polymer, a method of preparing a molecularly imprinted polymer material, and the use thereof. According to the invention a support comprising at least one monomer, and a template, in a polymerization medium is polymerized with a free radical initiator, whereafter the template is removed from the molecularly imprinted polymer obtained. The polymerization is confined to the surface of the support, preferably by confining the free radical initiator to the support by bonding adsorption. The molecularly imprinted polymer may be used in chromatography, for separations, in chemical sensors, in molecular recognition as stationary phase in capillaries, in selected sample enrichment or in catalysis.Type: GrantFiled: February 21, 2002Date of Patent: July 6, 2004Assignee: MIP Technologies ABInventors: Börje Sellergren, Claudia Sulitzky, Bärbel Rückert
-
Patent number: 6713580Abstract: The present invention relates to novel templates useful for generating novel compounds and to compounds produced utilizing the templates. The templates comprise quaternary amino acids that may be linked to solid supports. These templates make possible the production of novel classes of chemical compounds through a plurality of chemical reactions. The templates are advantageous for use in drug discovery regimes.Type: GrantFiled: December 6, 2001Date of Patent: March 30, 2004Assignee: Pharmacore, Inc.Inventors: Michael Johnson, Keqiang Li, Elso DiFranco, Daljit S. Dhanoa
-
Patent number: 6566469Abstract: A method for polymerization of substituted ethylene monomers in an enzyme-mediated process is disclosed. The reaction proceeds under mild conditions with a wide variety of monomers, and is capable of producing stereoregular polymers. In certain embodiments, no organic solvent is necessary.Type: GrantFiled: June 22, 2000Date of Patent: May 20, 2003Assignees: Trustees of Tufts College, Rohm & Haas Company, Polytechnic Institute of New YorkInventors: David Kaplan, Graham Swift, Richard A. Gross, Bhanu Kalra
-
Patent number: 6541579Abstract: An aqueous phase inhibitor for quenching free radical polymerization comprising a free radical quenching agent having a hydrophilic tail is disclosed, as well as a coating and related methods. In one embodiment, the free radical quenching agent can either be an N-hydroxylamine or an N-nitrosonamine, the hydrophilic tail can be a polyhydric alcohol tail and the inhibitor can be a concentrate in a liquid medium such as water, alcohol and mixture thereof.Type: GrantFiled: November 28, 2001Date of Patent: April 1, 2003Assignee: Sun Drilling Products CorporationInventor: Robert Albright
-
Patent number: 6538072Abstract: A method of preparing a multivalent array that includes: polymerizing at least one monomer comprising at least one polymerizable group and at least one latent reactive group in the presence of a metal carbene catalyst to form a polymer template comprising at least one latent reactive group; and combining the polymer template with at least one functionalizing reagent comprising at least one reactive group under conditions effective to react the latent reactive group of the polymer template with the reactive group of the functionalizing reagent to form a multivalent array.Type: GrantFiled: June 22, 2001Date of Patent: March 25, 2003Assignee: Wisconsin Alumni Research FoundationInventors: Laura L. Kiessling, Laura E. Strong
-
Patent number: 6525154Abstract: Molecularly imprinted polymers (MIPs) wherein the template comprises either a) a peptide or amino acid sequence that has an N-terminal histidine residue or b) histamine. The MIP's may be prepared in aqueous systems using reagents that are water soluble at the relevant concentrations. Also, the invention includes methods for using the MIP's as receptors or adsorbents for, or to determine the present or non-presence of, target molecules containing i) particular peptides or amino acid sequences having N-terminal histidine residue or ii) histamine.Type: GrantFiled: July 20, 2001Date of Patent: February 25, 2003Assignee: The Regents of the University of CaliforniaInventors: Kenneth J. Shea, Bradley R. Hart
-
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
-
Patent number: 6361981Abstract: A solution having a high concentration of ammonium (meth)acrylate and which is substantially free of (meth)acrylonitrile is made by enzymatic hydrolysis of (meth)acrylonitrile in the presence of water using an enzyme that has Km for (meth)acrylonitrile below 500 &mgr;m and Ki for ammonium (meth)acrylate about 100,000.Type: GrantFiled: September 19, 2000Date of Patent: March 26, 2002Assignee: Ciba Specialty Chemicals Water Treatments LimitedInventors: Kenneth Charles Symes, Jonathan Hughes
-
Patent number: 6348629Abstract: An aqueous phase inhibitor for quenching free radical polymerization comprising a free radical quenching agent having a hydrophilic tail is disclosed, as well as a coating and related methods. In one embodiment, the free radical quenching agent can either be an N-hydroxylamine or an N-nitrosonamine, the hydrophilic tail can be a polyhydric alcohol tail and the inhibitor can be a concentrate in a liquid medium such as water, alcohol and mixture thereof.Type: GrantFiled: August 9, 2001Date of Patent: February 19, 2002Assignee: Sun Drilling Products Corp.Inventor: Robert Albright
-
Publication number: 20020007016Abstract: A method of preparing a multivalent array that includes: polymerizing at least one monomer comprising at least one polymerizable group and at least one latent reactive group in the presence of a metal carbene catalyst to form a polymer template comprising at least one latent reactive group; and combining the polymer template with at least one functionalizing reagent comprising at least one reactive group under conditions effective to react the latent reactive group of the polymer template with the reactive group of the functionalizing reagent to form a multivalent array.Type: ApplicationFiled: June 22, 2001Publication date: January 17, 2002Inventors: Laura L. Kiessling, Laura E. Strong
-
Patent number: 6271315Abstract: A method of preparing a multivalent array that includes: polymerizing at least one monomer comprising at least one polymerizable group and at least one latent reactive group in the presence of a metal carbene catalyst to form a polymer template comprising at least one latent reactive group; and combining the polymer template with at least one functionalizing reagent comprising at least one reactive group under conditions effective to react the latent reactive group of the polymer template with the reactive group of the functionalizing reagent to form a multivalent array.Type: GrantFiled: June 17, 1999Date of Patent: August 7, 2001Assignee: Wisconsin Alumni Research FoundationInventors: Laura L. Kiessling, Laura E. Strong
-
Patent number: 5959050Abstract: The claimed invention is directed to a molecularly imprinted support formed from at least two distinct acylic monomers and at least one imprinted molecule. The support comprises beads having a uniform surface for reproducible presentation thereon.Type: GrantFiled: July 5, 1996Date of Patent: September 28, 1999Inventors: Klaus Mosbach, Andrew G. Mayes
-
Patent number: 5898064Abstract: Thermoplastic or thermosetting resin particles having a narrow particle size distribution are produced by suspending a liquid resinous composition in an aqueous solution of an anionic or cationic polyelectrolyte as primary particles of oil droplets, adjustion the suspension at a pH at which the polyelectrolyte is insolubilized to agglomerate into secondary particles of larger particle size, and allowing the secondary particles in the suspension to solidify.Type: GrantFiled: October 2, 1996Date of Patent: April 27, 1999Assignee: Nippon Paint Co., Ltd.Inventors: Yutaka Harada, Takehiro Ojima, Haruhiko Sato
-
Patent number: 5863551Abstract: The hydrogel is a copolymer of an N-substituted methacrylamide or acrylamide, a cross-linking agent and a complex sugar or derivative, a tissue adhesion peptide or a polymer conjugate with antibodies, the polymer being heterogeneous, elastically deformable and having an equilibrium water content of at least about 80%. It can be used for tissue regeneration and for organ repair, for example, in the developing and adult nervous system.Type: GrantFiled: October 16, 1996Date of Patent: January 26, 1999Assignee: Organogel Canada LTEEInventor: Stephane Woerly
-
Patent number: 5821311Abstract: The claimed invention is directed to stabilizers, polymers, and emulsifiers useful in preparing molecularly imprinted materials having recognition capabilities corresponding to the imprint molecule.Type: GrantFiled: July 5, 1996Date of Patent: October 13, 1998Inventors: Klaus Mosbach, Andrew G. Mayes
-
Patent number: 5563226Abstract: A process of making polymeric matte bead particles for use in photographic elements which comprises forming a suspension of ethylenically unsaturated monomer droplets in an aqueous media, subsequent to the formation of droplets and before commencement of reaction, adding to the aqueous media an effective amount of a hydrophilic colloid to improve adhesion and polymerizing the monomer to form solid polymeric particles.Type: GrantFiled: October 28, 1994Date of Patent: October 8, 1996Assignee: Eastman Kodak CompanyInventors: John L. Muehlbauer, Dennis E. Smith
-
Patent number: 5403899Abstract: A method for preparing powder of a vinyl chloride polymer comprises the steps of polymerizing vinyl chloride monomer or a vinyl monomer mixture mainly comprising vinyl chloride monomer in an aqueous medium and adding, to the polymerization system, a fluorine atom-containing nonionic surfactant in an amount ranging from 0.0001 to 0.5 part by weight per 100 parts by weight of the vinyl chloride monomer or the vinyl monomer mixture mainly comprising vinyl chloride monomer after the rate of polymerization reaches at least 70% or fine powder of at least one inorganic substance having a particle size ranging from 0.001 to 50 .mu.m in an amount ranging from 0.001 to 1.0 part by weight per 100 parts by weight of the vinyl chloride monomer or the vinyl monomer mixture mainly comprising vinyl chloride monomer after the rate of polymerization reaches at least 70%.Type: GrantFiled: January 27, 1994Date of Patent: April 4, 1995Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Tadashi Amano, Toshimichi Koga
-
Patent number: 5357001Abstract: The invention relates to new optically active amino acid derivatives of the general formula (I) ##STR1## in which n, R, R.sub.1, R.sub.2, R.sub.3, X and A have the meaning given in the description, which amino acid derivatives contain sulphoxide or sulphone groups, to two basic synthetic routes for the preparation from sulphur-containing amino acids, to the polymerization of these monomers and to the use of the polymers as optically active adsorbents for chromatographic resolution of racemates to give the enantiomers.Type: GrantFiled: June 23, 1993Date of Patent: October 18, 1994Assignee: Bayer AktiengesellschaftInventors: Michael Grosse-Bley, Bruno Bomer, Rolf Grosser, Walter Lange, Franz-Peter Hoever, Dieter Arlt
-
Patent number: 5155189Abstract: A process for preparing a particulate vinyl polymer resin and vinyl polymer resin derived therefrom wherein, comprising polymerization in the presence of a dispersant or graft dispersant having no ionic side groups, optionally containing terminal functional groups, said dispersant is derived from repeating units of .alpha.,.beta.-unsaturated ester(s) of acrylic and/or methacrylic acid and having a molecular weight average of from about 500 to about 50,000.Type: GrantFiled: October 26, 1990Date of Patent: October 13, 1992Assignee: The B. F. Goodrich CompanyInventors: Douglas E. Skillicorn, Keith L. Gardner, Lance A. Mayer, Scott Perry
-
Patent number: 5130387Abstract: A process for producing a vinyl chloride polymer for matted moldings which comprises performing the suspension polymerization of vinyl chloride monomer or a mixture of vinyl monomers composed mainly of vinyl chloride in an aqueous medium, said suspension polymerization being performed after the addition of an aqueous dispersion obtained by dispersing a polyfunctional monomer having 2 or more ethylenic double bonds in the molecule into an aqueous solution of a water-soluble partially saponified polyvinyl alcohol, a water-soluble cellulose eter or an emulsifier, thereby yielding a vinyl chloride resin composed of 5 to 90 wt % tetrahydrofuran-insoluble gel fraction, with the remainder being tetrahydrofuran-solubles.Type: GrantFiled: October 22, 1991Date of Patent: July 14, 1992Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Tadashi Amano, Shigehiro Hoshida
-
Patent number: 5047488Abstract: Vinyl polymers, e.g., the homo- and copolyvinyl chlorides, are prepared in one or more stages, to a degree of conversion of at least 50%, by suspended emulsion polymerizing at least one vinyl monomer, e.g., vinyl chloride, said at least one monomer having dispersed therein finely divided droplets of an aqueous solution of at least one component of a polymerization initiating system, and wherein the amount of water in said aqueous solution constitutes at least 19%, and preferably at least 20% by weight of the at least one monomer.Type: GrantFiled: March 17, 1988Date of Patent: September 10, 1991Assignee: AtochemInventors: Pierre Nogues, Francois Erard
-
Patent number: 5043404Abstract: A process for the preparation of polymeric particles which comprises mixing at least one monomer with a polymerization initiator, a crosslinking component and a chain transfer component; effecting bulk polymerization until partial polymerization results; dispersing the aforementioned partially polymerized monomer product in water containing a stabilizing component to obtain a suspension of particles in water and polymerizing the resulting suspension.Type: GrantFiled: April 21, 1989Date of Patent: August 27, 1991Assignee: Xerox CorporationInventors: Hadi K. Mahabadi, Denise Wright
-
Patent number: 4996251Abstract: The invention provides a substantially dry particulate composition comprising a polyacrylamide and an amidase. An aqueous composition made by dispersing this into water will then have a satisfactorily low content of residual acrylamide even if the initial polymer was contaminated with monomer. The composition is made by blending dry polyacrylamide particles with the amidase.Type: GrantFiled: February 9, 1989Date of Patent: February 26, 1991Assignee: Allied Colloids Ltd.Inventors: David Farrar, Peter Flesher, Peter R. B. Lawrence
-
Patent number: 4985524Abstract: A process of preparing a vinyl chloride polymer in a polymerization vessel comprising the steps of:charging a polymerization initiator through a charging passage communicating with the inside of the polymerization vessel, andpolymerizing vinyl chloride or a vinyl monomer mixture containing vinyl chloride in an aqueous medium,wherein after said polymerization initiator has been charged into the polymerization vessel, said charging passage is externally heated. This process can prevent scale formation in the charging passage, and produce a vinyl chloride polymer of high quality.Type: GrantFiled: May 18, 1989Date of Patent: January 15, 1991Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Tadashi Amano, Shigehiro Hoshida
-
Patent number: 4983668Abstract: Particle size, swelling, and other characteristics of unsaturated polyester beads are controlled in a suspension polymerization system to make beads suitable for use as fillers in molding and forming. Process steps include degassing prior to polymerization, positive pressure during polymerization, and washing to remove suspending agent.Type: GrantFiled: November 25, 1987Date of Patent: January 8, 1991Assignee: Aristech Chemical CorporationInventors: Louis A. Cutter, Richard A. Ganger, John J. Godfrey
-
Patent number: 4933399Abstract: A method of preventing polymer scales from sticking in a polymerization vessel during the polymerization of a monomer having an ethylenically double bond, wherein said polymerization is carried out in a polymerization vessel of which the inner wall and other parts with which said monomer comes into contact during polymerization are previously first coated with (a) a coating solution comprising a cationic dye and the resulting coating is then coated with (b) a coating solution comprising at least one component selected from the group consisting of anionic polymeric compounds, amphoteric polymeric compounds and hydroxyl group-containing organic compounds. Polymer scale formation can be effectively prevented.Type: GrantFiled: December 7, 1988Date of Patent: June 12, 1990Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Toshihide Shimizu, Ichiro Kaneko, Mikio Watanabe
-
Patent number: 4816539Abstract: A vinyl chloride copolymer is produced by copolymerizing vinyl chloride monomer or a monomer mixture comoposed of vinyl chloride monomer and copolymerizable monomer, with one or more than one kind of cross-linking agent selected from polyhydric alcohol diglycidyl ether diacrylate and dimethacrylate. The vinyl chloride copolymer has good moldability and can be made into moldings having good matte finish surface and also good permanent compression set resistance, creep resistance, heat resistance, and electrical properties.Type: GrantFiled: December 16, 1987Date of Patent: March 28, 1989Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Junich Watanabe, Tohru Yokota
-
Patent number: 4786679Abstract: A water-in-oil emulsion, the aqueous phase of which contains Amidase. An improved method of treating water-in-oil emulsions of acrylamide polymers with Amidase to reduce the acrylamide content thereof which comprises adding the Amidase in the form of a water-in-oil emulsion.Type: GrantFiled: February 13, 1987Date of Patent: November 22, 1988Assignee: Nalco Chemical CompanyInventors: Robert L. Wetegrove, Ralph W. Kaesler, Bhupati Bhattacharyya
-
Patent number: 4775742Abstract: A process is disclosed for producing vinyl halide homopolymers and copolymers that are suitable for use in clear solutions. The process comprises reacting vinyl halide and optional co-monomers in the presence of an aqueous medium containing a suspending agent, and treating the resulting resin particles with an acidic material. The resins resulting from the process of the invention have improved solution and film properties. When the resin is dissolved in a suitable solvent, the resulting solution has improved clarity, that is, a reduction of haze in the solution phase. When the solution is coated on a substrate and the solvent evaporated, either to provide a coated substrate or a cast film, the resulting films have improved clarity, that is, a reduction in haze in the film. The films and coatings have improved gloss as a result of reduction of seed particles in the film. Fibers produced from the resin solutions have improved integrity and strength.Type: GrantFiled: December 23, 1985Date of Patent: October 4, 1988Assignee: Occidental Chemical CorporatonInventor: Stephen T. Fitzpatrick
-
Patent number: 4742114Abstract: A water-in-oil emulsion, the aqueous phase of which contains Amidase. An improved method of treating water-in-oil emulsions of acrylamide polymers with Amidase to reduce the acrylamide content thereof which comprises adding the Amidase in the form of a water-in-oil emulsion.Type: GrantFiled: June 19, 1987Date of Patent: May 3, 1988Assignee: Nalco Chemical CompanyInventors: Robert L. Wetegrove, Ralph W. Kaesler
-
Patent number: 4732953Abstract: A polyvinyl chloride having high bulk density and enhanced plasticizer absorption is produced by suspension polymerization of vinyl chloride monomer and comonomers wherein the initial suspension of ingredients is generated such that the oil phase droplets formed in the suspension are compositionally equivalent with respect to initiator, and the level of suspending agent and agitation are chosen to substantially preclude agglomeration of resin particles throughout the reaction, thereby producing resin wherein the resin grain size distribution results directly from the oil phase droplet distribution created at or near the start of the reaction. The process is conducted under conditions so that the polymerization is commenced before the final distribution is established. In this manner, seed particles of resin are produced from the vinyl monomer prior to establishing the final particle distribution.Type: GrantFiled: June 23, 1983Date of Patent: March 22, 1988Assignee: Occidental Chemical CorporationInventors: William F. Carroll, Jr., Stephen T. Fitzpatrick, John M. Ogorzalek, Edward P. Tefft