Aldehyde Or Derivative Or Ketone As Reactant Forming A Solid Polymer Or Sicp In The Presence Of A Nonreactant Material Patents (Class 524/877)
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Patent number: 10844191Abstract: The present invention addresses the problem of providing a polyacetal resin composition which can minimize degradation of a molded product produced from the acetal resin composition, when the molded product is in contact with an acidic cleaner. Said problem is solved by a polyacetal resin composition, comprising: polyacetal copolymer (A) in an amount of 100 parts by mass, wherein said polyacetal copolymer (A) has a hemiformal terminal group content of 0.8 mmol/kg or less; hindered phenol-based antioxidant (B) in an amount of 0.1 to 1.0 part by mass; and at least one selected from an oxide of magnesium or zinc or a hydroxide of magnesium or zinc (C) in an amount more than 2.0 parts by mass and 30 parts by mass or less.Type: GrantFiled: February 23, 2018Date of Patent: November 24, 2020Assignee: Polyplastics Co., Ltd.Inventors: Hiroki Arai, Tomohiro Monma
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Patent number: 8524958Abstract: A method of preparing an oligomeric or polymeric compound in a liquid solution is disclosed which consists of reacting a Michael donor compound with a Michael acceptor compound in the presence of a first catalyst and a Group IA and/or Group IIA metal ion catalyst.Type: GrantFiled: June 13, 2008Date of Patent: September 3, 2013Assignee: Sun Chemical CorporationInventors: Richard M. Jones, Steven H. Nahm
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Publication number: 20120129971Abstract: The present invention relates to polymers which contain hydroxyl groups and acrylate groups, to processes for preparing them, and to their use.Type: ApplicationFiled: July 15, 2010Publication date: May 24, 2012Applicant: BASF SEInventors: Harm-Anton Klok, Sanhao Ji, Bernd Bruchmann, Christine Roesch
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Publication number: 20110223336Abstract: The invention describes novel compositions of crosslinkers that include at least two pendent photoactivatable groups, such as benzophenone moieties, and an initiator, such as acetophenone.Type: ApplicationFiled: September 3, 2009Publication date: September 15, 2011Applicant: INNOVATIVE SURFACE TECHNOLOGIES, INC.Inventors: Timothy A. Bloomquist, Mark W. Josephson, Laurie R. Lawin, Kristin S. Taton, Jie Wen
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Patent number: 8003297Abstract: Polymeric material, containing a latent acid which can be converted to an acid by irradiation by a laser and optionally further ingredients.Type: GrantFiled: December 14, 2009Date of Patent: August 23, 2011Assignee: BASF SEInventor: Michael Heneghan
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Patent number: 7960471Abstract: A poly(ether-ketone) composite of the formula: wherein CNF is carbon nanofibers and MWNT is multi-walled carbon nanotubes; wherein Ar represents ether-ketone repeating groups of the formula wherein Q is —O— or —O—(CH2)n—O—, wherein n has a value of 2-12; wherein R is —H, —CH3, or —C2H5, m has a value of 1 or 2; wherein R? is —H or —CH3; and wherein — denoted the presence of a direct C—C bond between Ar and CNF or MWNTg Also provided is a process for preparing the composite.Type: GrantFiled: August 28, 2008Date of Patent: June 14, 2011Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Loon-Seng Tan, Jong-Beom Baek
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Publication number: 20110015343Abstract: A method of preparing an oligomeric or polymeric compound in a liquid solution is disclosed which consists of reacting a Michael donor compound with a Michael acceptor compound in the presence of a first catalyst and a Group IA and/or Group IIA metal ion catalyst.Type: ApplicationFiled: June 13, 2008Publication date: January 20, 2011Inventors: Richard M. Jones, Steven H. Nahm
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Publication number: 20100266527Abstract: Polymers derived directly from acrolein monomer that are substantially soluble in water and/or aqueous media, together with methods for preparing same and compositions containing such for use as an anti-microbial, anti-cancer, anti-inflammatory and/or anti-coagulant.Type: ApplicationFiled: May 5, 2010Publication date: October 21, 2010Inventor: Graham J. H. MELROSE
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Patent number: 7655380Abstract: Polymeric material, containing a latent acid which can be converted to an acid by irradiation by a laser and optionally further ingredients.Type: GrantFiled: February 13, 2009Date of Patent: February 2, 2010Assignee: Ciba Specialty Chemicals CorporationInventor: Michael Heneghan
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Patent number: 7641979Abstract: The present invention is in the field of thermoplastic polymeric compositions, and, specifically, the present invention is in the field of poly(vinyl butyral) formation, storage, and use in multiple layer glazing panel interlayers, among other uses.Type: GrantFiled: April 30, 2008Date of Patent: January 5, 2010Assignee: Solutia Inc.Inventors: Wenjie Chen, Andrew Neil Smith, Aristotelis Karagiannis
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Publication number: 20090017307Abstract: The present invention relates to advantageous processes for the manufacture of organic pigments and their precursors. The invention particularly relates to reactions carried out in an “All In One Reactor”® (Draiswerke GmbH, Germany), a kneader like the TurbuKneader® of the same company, a paddle dryer like the Turbudry® of the same company or a related system and thereby submitting the reaction mixtures to enhanced driving power as expressed by a Froude number >1, the reaction mixture being caused to react in high concentrations at elevated temperature.Type: ApplicationFiled: May 16, 2008Publication date: January 15, 2009Applicant: MCA TECHNOLOGIES, GMBHInventor: Bansi Lal KAUL
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Publication number: 20080306210Abstract: The invention relates to new compositions having good binder properties, wetting properties and dispersing properties not only for virtually foam-free aqueous pigment preparations but also for solvent-borne and solvent-free pigment preparations with very good heat stability and weathering stability.Type: ApplicationFiled: November 6, 2006Publication date: December 11, 2008Inventors: Patrick Glockner, Evelyn Albrecht, Andreas Wenning
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Publication number: 20080242800Abstract: Colored molding compositions made from polyacetal copolymer, where the polyacetal copolymer essentially consists of oxymethylene units and oxyethylene units, and a strong protonic acid was used as initiator during preparation of the polyacetal copolymer, have lower formaldehyde emission than that from a comparable molding composition for which the polyacetal copolymer was prepared using a Lewis acid as initiator. The formaldehyde emission is generally less than 20 mg/kg, preferably less than 10 mg/kg.Type: ApplicationFiled: June 6, 2008Publication date: October 2, 2008Applicant: TICONA GmbHInventors: Stefan Disch, Karl-Friedrich Mueck, Lothar Reibmann
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Publication number: 20080206574Abstract: The present invention is in the field of thermoplastic polymeric compositions, and, specifically, the present invention is in the field of poly(vinyl butyral) formation, storage, and use in multiple layer glazing panel interlayers, among other uses.Type: ApplicationFiled: April 30, 2008Publication date: August 28, 2008Inventors: Wenjie Chen, Andrew Neil Smith, Aristotelis Karagiannis
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Patent number: 7150958Abstract: Polymeric material, containing a latent acid which can be converted to an acid by irradiation by a laser and optionally further ingredients.Type: GrantFiled: June 4, 2002Date of Patent: December 19, 2006Assignee: Ciba Specialty Chemicals CorporationInventor: Michael Heneghan
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Patent number: 6906129Abstract: A polymer scale preventive agent for use in the polymerization of a monomer containing an ethylenic double bond is provided. The agent includes (A) a condensation reaction product obtained by reacting an aldehyde compound and a hydroxynaphthalene-based compound in the presence of a reducing agent, and (B) a polymer compound containing a nitrogen atom. This agent is capable of forming a coating with satisfactory scale prevention properties on inner wall surfaces of a polymerization vessel with a single-stage application, enabling the production process time to be shortened and the productivity and quality of polymeric products improved.Type: GrantFiled: September 3, 2004Date of Patent: June 14, 2005Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Mikio Watanabe, Tadashi Amano
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Patent number: 6740706Abstract: The invention relates to an economical method of making a polymer having reduced VOCs and coating compositions containing such polymers. In one embodiment, the method of invention requires providing a reactant mixture (a), providing a solvent mixture (b) comprising a reactive component (c) which is substantially free of any heteroatoms and is not a crystalline solid at room temperature and comprises (i) from 12 to 72 carbon atoms, and (ii) at least two functional groups, and subjecting the reactant mixture (a) in the solvent mixture (b) to polymerization conditions sufficient to polymerize reactant mixture (a) to provide a mixture (d) of a polymer (a′) in solvent mixture (b), wherein reactive component (c) under the polymerization conditions is substantially nonreactive: (1) with the components of reactive mixture (a), (2) in the polymerization of reactant mixture (a) and (3) with the polymer (a′).Type: GrantFiled: December 7, 2001Date of Patent: May 25, 2004Assignee: BASF CorporationInventors: Walter H. Ohrbom, Robert D. Weise, James A. Laugal
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Patent number: 6528582Abstract: A one-step, in-situ, process for producing a high solids content emulsion or dispersion of partially or totally crosslinked urea formaldehyde (UF), melamine formaldehyde (MF), or melamine urea formaldehyde (MUF) resin droplets or particles, by forming a reaction mixture of (i) aqueous formaldehyde (formalin), (ii) at least one water-soluble protective colloid, (iii) water and (iv) optionally a surfactant, and mixing the reaction mixture in a reaction vessel; optionally adjusting the initial pH of the reaction mixture according to a desired value as needed; adding (i) urea or substituted urea, (ii) melamine or substituted melamine, or (iii) a mixture thereof, to the reaction mixture; and heating the reaction mixture to a temperature at which condensation takes place between the (i) urea or substituted urea, (ii) the melamine or substituted melamine, or (iii) the mixture thereof, and the formaldehyde to form a urea formaldehyde, melamine formaldehyde or melamine urea formaldehyde resin, and holding the reactionType: GrantFiled: March 30, 2001Date of Patent: March 4, 2003Assignee: Neste Resins CanadaInventors: Kwok Tang, Guomin Bian, Leena Matilainen, Sinikka Ingelin
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Patent number: 6506838Abstract: Modified oxymethylene polymers comprising a linear polymer of oxymethylene repeat units, blocked at one end by at least one terminal group selected from the group consisting of an alkylene oxide as an adduct to alcohol and an alkylene oxide as an adduct to carboxylic acid, the linear polymer excluding the terminal group having a number average molecular weight of 10,000-500,000 and the modified oxymethylene polymer having a molecular weight distribution (Mw/Mn) of not more than 2.5, obtained by anionic polymerization of formaldehyde and the alkylene oxide as an adduct to alcohol and/or carboxylic acid. The present modified oxymethylene polymers can give moldings with improved repeated impact resistance at the welded parts and controlled smell generation, and improved sliding characteristics, wherein the sliding characteristics are further improved upon combination with an olefinic polymer.Type: GrantFiled: October 25, 2000Date of Patent: January 14, 2003Assignee: Asahi Kasei Kabushiki KaishaInventor: Toshiharu Seyama
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Patent number: 6455631Abstract: The present invention relates to aqueous polyurethane dispersions wherein the polyurethanes contain terminal hydrazide groups and correspond to the formula wherein the terminal, modified hydrazide groups are present in an amount of 1 to 25% by weight [calculated as C(O)—NH—NH—C(O), MW 84], based on the weight of the polyurethanes, and wherein X represents OR′ or NHR′, R represents the residue obtained by removing the isocyanate groups from an NCO prepolymer, R′ represents a group which is inert to Isocyanate groups under the conditions used to form the polyurethane of in formula I, R″ represents a divalent, linear or branched aliphatic group containing 2 to 10 carbon atoms, provided that there are at least two carbons between the oxygen atoms, wherein the aliphatic group may optionally be substituted by heteroatoms to form ether or ester groups, m is 0 or 1 and n is 2 to 4.Type: GrantFiled: December 1, 2000Date of Patent: September 24, 2002Assignees: Bayer Corporation, Bayer AktiengesellschaftInventors: Harald Blum, Lyubov K. Gindin, Karen M. Henderson, Patricia B. Jacobs, Sze-Ming Lee, Brian Long, Robert A. Sylvester, Douglas A. Wicks
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Publication number: 20020103292Abstract: The present invention relates to aqueous polyurethane dispersions wherein the polyurethanes contain terminal hydrazide groups and correspond to the formula 1Type: ApplicationFiled: December 1, 2000Publication date: August 1, 2002Inventors: Harald Blum, Lyubov K. Gindin, Karen M. Henderson, Patricia B. Jacobs, Sze-Ming Lee, Brian Long, Robert A. Sylvester, Douglas A. Wicks
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Patent number: 6245853Abstract: A one-step, in-situ, process for producing a high solids content emulsion or dispersion of partially or totally crosslinked urea formaldehyde or melamine formaldehyde resin droplets or particles, by forming a reaction mixture of (i) aqueous formaldehyde (formalin), (ii) at least one water-soluble protective colloid, (iii) water and (iv) optionally a surfactant, and mixing the reaction mixture in a reaction vessel; optionally adjusting the initial pH of the reaction mixture according to a desired value as needed; adding (a) urea, substituted urea, or a mixture thereof, or (b) melamine, substituted melamine, or a mixture thereof, to the reaction mixture; and heating the reaction mixture to a temperature at which condensation takes place between the (a) urea, substituted urea, or the mixture thereof, or (b) melamine substituted melamine, or the mixture thereof, and the formaldehyde to form a urea formaldehyde or melamine formaldehyde resin, and holding the reaction mixture at that temperature or a higher temperaType: GrantFiled: May 16, 2000Date of Patent: June 12, 2001Assignee: Neste Resins CanadaInventors: Kwok Tang, Guomin Bian, Leena Matilainen, Sinikka Ingelin
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Patent number: 5869184Abstract: Provided by the present invention are novel diguanamine derivatives, led by 2,5/2,6-bis(4,6-diamino-1,3,5-triazin-2-yl)-bicyclo?2.2.l!heptanes and 1,3/1,4-bis(4,6-diamino-1,3,5-triazin-2-yl)-cyclo-hexanes, and derivatives thereof, applications of these compounds in fields such as adhesives and paints, utilization of these compounds in flame-retarding, thermal stabilization and compatibilization methods of resins, thermosetting molding compositions and thermosetting expansion-molding compositions making use of these compounds, as well as polymeric microspheres also using these compounds. These compounds are expected to find wide spread industrial utility as various excellent properties can be obtained by using them.Type: GrantFiled: February 14, 1997Date of Patent: February 9, 1999Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Tetsuya Oishi, Jin Suzuki, Kouhei Ohkawa, Satoshi Furusawa, Hiroshi Ono, Kazuo Sugazaki
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Patent number: 5731249Abstract: The object of the present invention is to provide a spray-on (gunning) refractory composition having high anti-stripping property, adhesive strength and corrosion resistant property suitable even for high temperature operation in steelmaking furnace. To refractory materials, resol type phenolic resin powder, being in semi-melting state at 80.degree. C. to 500.degree. C. and having weight average molecular weight of 1,000 to 15,000 and residual monomer of not more than 1,000 ppm, or phenol-formaldehyde resin powder, being in heat melting, self-hardening state at 100.degree. C. to 500.degree. C., having weight average molecular weight of 1,000 to 15,000 and residual monomer of not more than 1,000 ppm, and containing reactive methylol group by 6 to 9 weight %, said phenol-formaldehyde resin powder being added by 2 to 10 weight %, and pitch with high softening point of 100.degree. C. to 500.degree. C. being added by 2 to 10 weight %.Type: GrantFiled: November 4, 1996Date of Patent: March 24, 1998Assignee: Shinagawa Refractories Co., Ltd.Inventors: Hiroyuki Sugimoto, Tasuku Matsuda, Koichi Tanaka, Hiroshi Takenaka
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Patent number: 5670572Abstract: The present invention relates to melamine-formaldehyde resins comprising a guanamine, to processes for their preparation and to their use for the production of melamine resin films and edgings.Type: GrantFiled: November 3, 1995Date of Patent: September 23, 1997Assignee: Hoechst AktiengesellschaftInventors: Jurgen Ott, Manfred Schon, Wilhelm Adam, Frank Scholl, Alfons Wolf
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Patent number: 5457155Abstract: A process for preparing a controlled functional density poly(secondary amine) comprising: (a) contacting a polymer containing olefinic unsaturation with carbon monoxide in hydrogen under hydroformylation conditions in the presence of a hydroformylation catalyst to produce a controlled functional density polyaldehyde containing reactive carbon-carbon double bonds, and (b) contacting the polyaldehyde with hydrogen and a primary amine under reductive amination conditions in the presence of a ruthenium-containing imine hydrogenation catalyst or (b.sup.1) contacting the polyaldehyde with a sterically hindered aliphatic or cycloaliphatic primary amine or an aromatic primary amine under reductive amination conditions in the presence of an alkali metal borohydride to produce poly(secondary amine) having a substantially equivalent ratio of secondary amine groups to reactive carbon-carbon double bonds as the ratio of aldehyde groups to reactive carbon-carbon double bonds in the polyaldehyde.Type: GrantFiled: February 3, 1995Date of Patent: October 10, 1995Assignee: Monsanto CompanyInventors: Martin P. McGrath, Samuel J. Tremont
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Patent number: 5457147Abstract: A process for preparing a controlled functional density poly(secondary amine) comprising: (a) contacting a polymer containing olefinic unsaturation with carbon monoxide in hydrogen under hydroformylation conditions in the presence of a hydroformylation catalyst to produce a controlled functional density polyaldehyde containing reactive carbon-carbon double bonds, and (b) contacting the polyaldehyde with hydrogen and a primary amine under reductive amination conditions in the presence of a ruthenium-containing imine hydrogenation catalyst or (b.sup.1) contacting the polyaldehyde with a sterically hindered aliphatic or cycloaliphatic primary amine or an aromatic primary amine under reductive amination conditions in the presence of an alkali metal borohydride to produce poly(secondary amine) having a substantially equivalent ratio of secondary amine groups to reactive carbon-carbon double bonds as the ratio of aldehyde groups to reactive carbon-carbon double bonds in the polyaldehyde.Type: GrantFiled: February 3, 1995Date of Patent: October 10, 1995Assignee: Monsato CompanyInventors: Martin P. McGrath, Samuel J. Tremont
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Patent number: 5310784Abstract: An electromagnetic wave shielding material comprises a composite carbon-resin compound obtained by reacting to proceed polymerization of a resin forming material with carbon powder intermixed therewith. The resulting compound has carbon powder substantially uniformly dispersed in the resin and exhibit superior electromagnetic wave shielding effect, in addition to good fire resistance. The resin may be phenol, melamine, furan or the like, and the carbon powder is preferred to be incorporated at a content of not less than 40% of the total weight.Type: GrantFiled: June 29, 1992Date of Patent: May 10, 1994Assignee: Lignyte Co., Ltd.Inventors: Isamu Ide, Hisato Higuchi, Masanobu Nishikawa, Shigehisa Ishihara, Shuichi Kawai
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Patent number: 5047466Abstract: Amino resin solutions having an electrical conductivity of <100 .mu.S/cm for impregnating paper are obtainable byA) methylolation of melamine with aqueous formaldehyde in a molar ratio of from 1:2 to 1:5 in the presence of a tertiary organic amine at a pH of from 7 to 12,B) etherification with a molar excess, based on the methylol groups, of a C.sub.1 -C.sub.4 -alcohol in the presence of an unsubstituted or substituted dicarboxylic acid and/or polycarboxylic acid at a pH of from 3 to 6,C) neutralization of the reaction mixture with an inorganic base and removal of the volatile components by distillation, except for a water content of <10% by weight, based on the reaction mixture, andD) addition of a C.sub.1 -C.sub.4 -alcohol to give a solids content of from 40 to 90% by weight, based on the amino resin solution, and removal of insoluble components by filtration.Type: GrantFiled: February 8, 1990Date of Patent: September 10, 1991Assignee: BASF AktiengesellschaftInventors: Gerd Busse, Jakob Decher, Wolfgang Eisele, Edgar Haeussler, Otto Wittmann
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Patent number: 5030678Abstract: Disclosed are cationic aqueous emulsions containing (a) sizing composition comprising the reaction product of melamine formaldehyde compound, long chain saturated alcohol and long chain saturated or unsaturated polyethoxylated alcohol; and (b) cationic surfactant. The emulsions when used to surface size paper impart improved oil, water and polar solvent resistance thereto. The emulsions may be used alone or as substantial replacements for anionic or non-ionic fluorocarbon based emulsions that are typically used to impart oil resistance to paper.Type: GrantFiled: July 2, 1990Date of Patent: July 9, 1991Assignee: PPG Industries, Inc.Inventors: Sai H. Hui, Mean-Jeng Hou
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Patent number: 5011886Abstract: The inventive concept is to condense the phenol formaldehyde resins to a higher molecular weight than usual so far. Subsequent addition of urea thereto reduces viscosity to normal levels and increases solid content.The added urea does not take part in condensation reaction but partly reacts in the alkaline medium with formaldehyde to methylol urea (in a so called equilibrium reaction), which is formaldehyde donor for the phenol formaldehyde crosslinking reaction during the pressing of the particle board.The present invention relates to a process for producing modified phenolic resin bonding agents, characterized by preparing as known per se phenol-formaldehyde resins with a viscosity of more than 300 mPa.s (at 20.degree. C.Type: GrantFiled: February 26, 1990Date of Patent: April 30, 1991Assignee: Rwe-Dea Aktiengesellschaft fur Mineraloel und ChemieInventors: Adolf Buschfeld, Matthias Lattekamp, Gerd Ripkens, Hans Schittek
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Patent number: 4921543Abstract: A process for the preparation of a liquifier for mineral binding agents comprising condensing a member of a group consisting of naphthalene sulfonic acid and alkyl naphthalene sulfonic acids with formaldehyde or a formaldehyde precursor in a highly acidic solution until a viscosity of 4,000 to 8,000 mPas is reached, adding water periodically to reduce the viscosity of the mixture until the condensation is complete and neutralizing the mixture to obtain a water-soluble condensation product and the liquifier produced thereby and mineral binding agents containing the same.Type: GrantFiled: August 24, 1988Date of Patent: May 1, 1990Assignee: Rutgerswerke AGInventors: Jafar Omran, Arnold Alscher
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Patent number: 4758475Abstract: Polyurethane dispersions based on reaction products from (A) bismethylolated urethanes having at least 2 urethane groups and (B) polyhydroxyl compounds which contain groups which are capable of ion formation, these groups being present in neutralized form, and a process for the preparation thereof. The use of the dispersions for the surface-coating of metal, plastics, glass, leather and paper.Type: GrantFiled: December 18, 1986Date of Patent: July 19, 1988Assignee: Hoechst AGInventors: Helmut Eckes, Dieter Engel
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Patent number: 4594370Abstract: A process for producing amine-formaldehyde microcapsules wherein the reaction of the amine and formaldehyde to form the microcapsule wall is carried out in the presence of a polyol as a systems modifier.Type: GrantFiled: March 29, 1985Date of Patent: June 10, 1986Assignee: The Mead CorporationInventor: David G. Adkins
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Patent number: 4543388Abstract: Thermosettable prepolymers or resins are prepared by reacting a pyrazine containing at least two substituent groups which have a hydrogen atom attached to a carbon atom which is attached to the ring with a material containing at least two aromatic aldehyde groups. These prepolymers or resins are curable to thermoset products having good mechanical and thermal properties. Thermoset polymers having good mechanical and thermal properties are also prepared by homopolymerization in the presence of N,N'-bis-imides or copolymerization of these prepolymers with N,N'-bis-imides. The prepolymers are suitable for preparing composites.Type: GrantFiled: November 9, 1984Date of Patent: September 24, 1985Assignee: The Dow Chemical CompanyInventors: Duane S. Treybig, Loren L. Swearingen
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Patent number: 4483961Abstract: Polymeric cyclopentadiene derivatives, method for preparing polymeric cyclopentadiene derivatives, and use of polymeric cyclopentadiene derivatives in curable binder compositions.Type: GrantFiled: August 17, 1983Date of Patent: November 20, 1984Assignee: Ashland Oil, Inc.Inventors: Diether Koch, Bruce A. Gruber, Heimo J. Langer, William R. Dunnavant
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Patent number: 4482653Abstract: Cyclopentadiene derivatives, method for preparing cyclopentadiene derivatives, and use of cyclopentadiene derivatives in curable binder compositions.Type: GrantFiled: August 5, 1983Date of Patent: November 13, 1984Assignee: Ashland Oil, Inc.Inventors: Bruce A. Gruber, Diether Koch, Heimo J. Langer, William R. Dunnavant
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Patent number: 4452934Abstract: Aminoplast resin compositions formed by reaction of an amino-aldehyde precursor in the presence of a cationic surfactant and a hydrocarbon product consisting essentially of components having average carbon chain lengths of about 12 or higher are provided. The aminoplast resin compositions have particular applicability as softening agents for paper and other cellulosic products.Type: GrantFiled: September 28, 1981Date of Patent: June 5, 1984Assignee: Georgia-Pacific CorporationInventor: John H. Swafford
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Patent number: 4451609Abstract: A flame-retarded speaker diaphragm is prepared by making a cone from cellulose fibers, impregnating the cellulosic cone with a solution of a trimethylol melamine monomer, an organic phosphorus- and nitrogen-containing compound, and a trialkyl amine catalyst in an alcohol solvent, and heating the impregnated cone until the solvent is removed and the melamine resin is cured. Flame retardancy is imparted to the cellulose cone-shaped diaphragm without the sacrifice of its frequency response.Type: GrantFiled: June 24, 1982Date of Patent: May 29, 1984Assignees: Pioneer Electronic Corporation, Mogami Denki Kabushiki KaishaInventors: Fumio Kawahara, Masanori Takahashi, Katsuyoshi Kumagai
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Patent number: 4439381Abstract: Methods of converting essentially unpolymerized precursors into polyimides in which the precursors are exposed to microwave radiation. Preheating, thermal post-curing, and other techniques may be employed to promote the development of optimum properties; and reinforcements can be employed to impart strength and rigidity to the final product. Also disclosed are processes for making various composite artifacts in which non-polymeric precursors are converted to polyimides by using the techniques described above.Type: GrantFiled: May 11, 1981Date of Patent: March 27, 1984Assignee: I M L CorporationInventors: John Gagliani, Raymond Lee, Anthony L. Wilcoxson
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Patent number: 4427800Abstract: Refractory shaped articles are prepared by heating refractory mixes comprised of refractory particles and a liquid phenolic resole resin having a methylol group index of about 0.8 or less and a free moisture content of about 8 weight percent or less.Type: GrantFiled: February 12, 1982Date of Patent: January 24, 1984Assignee: Sumitomo Durez Company, Ltd.Inventors: Masayuki Nakamura, Masaaki Tsuriya
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Patent number: 4396733Abstract: The present invention relates to new azulmic acids stabilized by condensation with carbonyl compounds, several processes for their preparation and their use for various purposes.Type: GrantFiled: September 11, 1980Date of Patent: August 2, 1983Assignee: Bayer AktiengesellschaftInventors: Kuno Wagner, Kurt Findeisen
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Patent number: 4361453Abstract: Methods of converting essentially unpolymerized precursors into polyimides in which the precursors are exposed to microwave radiation. Preheating, thermal post-curing, and other techniques may be employed to promote the development of optimum properties; and reinforcements can be employed to impart strength and rigidity to the final product. Also disclosed are processes for making various composite artifacts in which non-polymeric precursors are converted to polyimides by using the techniques described above.Type: GrantFiled: May 11, 1981Date of Patent: November 30, 1982Assignee: International Harvester CompanyInventors: John Gagliani, Raymond Lee, Anthony L. Wilcoxson