Core-shell Patents (Class 525/902)
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Patent number: 6337360Abstract: Poly(meth)acrylate dispersions, comprised of: (A) 50-90 wt. % methacrylic acid esters; (B) 5-30 wt. % acrylic acid alkyl esters; [lit., “acrylic acid acrylic esters”]; (C) 2-10 wt. % of another functionalized monomer; (D) 2-10 wt. % of a radically polymerizable carboxylic acid or a polycarboxylic acid or a partially esterified polycarboxylic acid; and (E) 0-40 wt. % of a monomer which is copolymerizable with components (A) to (D).Type: GrantFiled: July 31, 2001Date of Patent: January 8, 2002Assignee: Roehm GmbH Chemische FabrikInventors: Hubert Scheuermann, Dieter Tessmer, Karl Foelsch, Wilhelm Elser, Michael Wicke
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Publication number: 20010056150Abstract: An improved process for preparing an aqueous dispersion of plastics additive polymer particles using emulsion polymerization of one or more ethylenically unsaturated monomers in an aqueous medium in the presence of a free radical redox initiator system is described. The free radical redox initiator system uses an oxidizing agent, a reducing agent, and a combination of metal ion species. The plastics additive polymer particles are useful as processing aids and impact modifiers in PVC articles.Type: ApplicationFiled: May 4, 2001Publication date: December 27, 2001Inventors: Robert Julian Smith, Katherine Sue Rice, Kirk Harold Moyer, Richard John Ketz, Eugene Patrick Dougherty, Patricia Marie Lesko
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Patent number: 6323292Abstract: Poly(meth)acrylate dispersions, comprised of: (A) 50-90 wt. % methacrylic acid esters; (B) 5-30 wt. % acrylic acid alkyl esters; (C) 2-10 wt. % of another functionalized monomer; (D) 2-10 wt. % of a radically polymerizable carboxylic acid or a polycarboxylic acid or a partially esterified polycarboxylic acid; and (E) 0-40 wt. % of a monomer which is copolymerizable with components (A) to (D).Type: GrantFiled: May 11, 2001Date of Patent: November 27, 2001Assignee: Roehm GmbH Chemische FabrikInventors: Hubert Scheuermann, Dieter Tessmer, Karl Foelsch, Wilhelm Elser, Michael Wicke
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Patent number: 6319992Abstract: A method for preparing a dispersion for a pressure sensitive adhesive is provided, wherein the dispersions contain a copolymer (CP) having units of butyl acrylate and meth)acrylic acid; the method involving the steps of polymerizing an aqueous emulsion (EM) containing butyl acrylate, an anionic emulsifier and a non-ionic emulsifier, in the aqueous phase, under heating and in the presence of at least one water-soluble initiator (IN) of formula (I) MR1 (I) where M represents a metal cation, and R1 represents an anion of a peroxyacid or azo-group-containing acid, wherein (IN) is present in an amount of 0.5-1.5 wt. % (based on weight of the monomers); emulsifying-in (meth)acrylic acid while maintaining an elevated reaction temperature; and adding a second initiator (RI) to complete the polymerization.Type: GrantFiled: May 30, 1996Date of Patent: November 20, 2001Assignee: Roehm GmbH Chemische FabrikInventors: Gunther Mueller, Herbert Fink, Joachim Heyne
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Patent number: 6316548Abstract: A (meth)acrylic premix comprising a (meth)acrylic resin composition (A) containing a (meth)acrylic monomer (a) and a (meth)acrylic polymer (b), an inorganic filler (B), and a curing agent (C), wherein, the component (a) is a (meth)acrylate having a bicyclo ring, fluorine atom, cyclic ether, cyclohexane ring or tricyclo ring, and the component (C) is a radical polymerization initiator having a 10 hours half-life temperature of 75° C. or more; an acrylic SMC or BMC comprising this (meth)acrylic premix and a thickening agent; and a method for producing (meth)acrylic artificial marble, wherein this (meth)acrylic SMC or BMC is cured with being pressurized and heated at a temperature in the range from 105 to 150° C., are provided. These are useful for producing (meth)acrylic artificial marble having various excellent physical properties such as appearance, dimension stability, hot water resistance, weatherability.Type: GrantFiled: October 14, 1999Date of Patent: November 13, 2001Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Seiya Koyanagi, Katsumi Yonekura, Shinji Saiki, Kentaro Hayashi, Yuichiro Kishimoto
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Patent number: 6297328Abstract: Surfactant-containing acetoacetoxy-functional polymers (SAAP's) are described. The acetoacetoxy-functional polymer may be a surfactant-containing enamine-functional polymer and more preferably a surfactant-containing, polymeric (polyamino)enamine (PPAE). The PPAE is the reaction product of a surfactant-containing acetoacetoxy-functional polymer (SAAP) and a poly(alkylenimine). The polymers may be prepared as waterborne polymer compositions, such as latexes. The waterborne polymer compositions can be prepared with high solids content while maintaining low viscosity. Waterborne polymer compositions containing the polymers of the inventions are useful in a variety of coating formulations such as, for example, paints, inks, sealants, and adhesives. When used in coating formulations, the polymers of the invention provide adhesion and crosslinking in the final film or coating. The film or coating may be cured at ambient temperatures or may be thermally cured.Type: GrantFiled: March 31, 1998Date of Patent: October 2, 2001Assignee: Eastman Chemical CompanyInventors: Martha Jean Collins, James Wayne Taylor
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Patent number: 6291565Abstract: Vinylidene chloride polymer compositions comprising a vinylidene chloride polymer and from about 2 to about 12 weight percent of a glycerin ester provide films which exhibit oxygen transmission rates sufficiently low to protect gassy cheeses from spoilage but sufficiently high to let any excess CO2 produced during the cheese curing process escape from the packaged gassy cheeses.Type: GrantFiled: May 19, 1994Date of Patent: September 18, 2001Assignee: The Dow Chemical CompanyInventors: Susan M. Kling, Bernard E. Obi
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Patent number: 6288167Abstract: The present invention is directed to blends of two grafted rubber substrates and a matrix polymer wherein one of the grafted rubber substrates uses a core/shell rubber such as a styrene/butyl acrylate rubber in order to obtain a lower contrast ratio in the blends and better colorability as well as good impact strength.Type: GrantFiled: May 26, 1999Date of Patent: September 11, 2001Assignee: Bayer Antwerpen S.A./N.V.Inventors: Chuan-Ju Chen, Fred Ming-sheng Peng
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Publication number: 20010016612Abstract: Acrylic polymer fine particles which comprise primary particles P of 250 nm or more in average particle diameter having a core shell structure and plastisols prepared using the same.Type: ApplicationFiled: January 2, 2001Publication date: August 23, 2001Applicant: Mitsubishi Rayon Co., Ltd.Inventor: Toshihiro Kasai
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Patent number: 6268065Abstract: A hot-sealable coated substrate comprising a primer layer from an aqueous poly(meth)acrylate dispersion, comprised of: (A) 50-90 wt. % methacrylic acid esters; (B) 5-30 wt. % acrylic acid alkyl esters [lit., “acrylic acid acrylic esters”]; (C) 2-10 wt. % of another functionalized monomer; (D) 2-10 wt. % of a radically polymerizable carboxylic acid or a polycarboxylic acid or a partially esterified polycarboxylic acid; and (E) 0-40 wt. % of a monomer which is copolymerizable with components (A) to (D).Type: GrantFiled: October 11, 2000Date of Patent: July 31, 2001Assignee: Roehm GmbH Cemische FabrikInventors: Hubert Scheuermann, Dieter Tessmer, Karl Foelsch, Wilhelm Elser, Michael Wicke
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Publication number: 20010009935Abstract: An impact resistant acrylic polymer pellet comprising an acrylic multi-layer polymer having at least one rubber-like elastomer layer (&agr;) as an inner layer and having a rigid polymer layer (&bgr;) as an outermost layer which is containing methyl methacrylate as a main component, wherein the proportion of parts insoluble in acetone including the polymer of the rubber-like elastomer layer (&agr;) is from 70 to 97% by weight per unit weight of the pellet, and a method for producing the same are disclosed. The pellet is excellent in handling property, and has high content of a rubber-like elastomer.Type: ApplicationFiled: December 18, 2000Publication date: July 26, 2001Applicant: MITSUBISHI RAYON CO., LTDInventors: Kaoru Matsuda, Hideaki Makino
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Patent number: 6262144Abstract: A process for preparing aqueous polymer dispersions comprises first of all subjecting ethylenically unsaturated monomers to free-radical aqueous emulsion polymerization to prepare an aqueous dispersion of a polymer 1 having a glass transition temperature Tg1, then dissolving further, comparatively hard monomers in the dispersed particles of the polymer 1, and subsequently carrying out free-radical polymerization of the monomers dissolved in the particles.Type: GrantFiled: December 1, 2000Date of Patent: July 17, 2001Assignee: BASF AktiengesellschaftInventors: Cheng-Le Zhao, Joachim Roser, Eckehardt Wistuba, Bernhard Schuler, Klemens Mathauer
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Patent number: 6255363Abstract: An organosol comprising a high molecular weight (co)polymeric steric stabilizer covalently bonded to an insoluble, high molecular weight thermoplastic (co)polymeric core is described which has the ability to form a three dimensional gel of controlled rigidity. The gel provides improved liquid ink or liquid electrophotographic/electrographic toner compositions by increasing sedimentation stability of the colorant, without compromising print quality or ink transfer performance. The gel is formed by manipulating the solubility parameter difference between the stabilizer and the solvent to achieve optimum performance of the dispersion.Type: GrantFiled: September 26, 1996Date of Patent: July 3, 2001Assignee: 3M Innovative Properties CompanyInventors: James A. Baker, Jai Venkatesan, Wu-Shyong Li, Gay L. Herman, Stewart H. Corn
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Patent number: 6252004Abstract: A process for preparing emulsion polymer particles comprising: (a) providing an aqueous emulsion of a multistage core-shell polymer with a hydrophilic core, (b) adding one or more inhibitors to substantially stop any polymerization, (c) adding monomer to the emulsion polymer, (d) adding swelling agent and (e) reducing the level of monomer by at least fifty percent. The process produces multistage polymers having low dry-bulk density useful in coating compositions such paints and paper coatings.Type: GrantFiled: October 14, 1999Date of Patent: June 26, 2001Assignee: Rohm and Haas CompanyInventors: Robert Mitchell Blankenship, James Keith Bardman
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Patent number: 6248807Abstract: High impact polystyrene having a predominant core-shell morphology is made by polymerizing styrene in the presence of polybutadiene using toluene as a solvent. The thermoplastic polymer composition is characterized by a continuous phase of polystyrene containing dispersed graft copolymer particles having a core-shell structure with a polystyrene core occluded inside a polybutadiene shell. The styrene is desirably batch polymerized using styrene/toluene mixtures of about 70:30 by weight in the presence of from about 9 to about 15 weight percent polybutadiene while flashing off the toluene solvent.Type: GrantFiled: March 15, 1999Date of Patent: June 19, 2001Assignee: Fina Technology, Inc.Inventors: Jose M. Sosa, Lu Ann Kelly
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Patent number: 6239216Abstract: The invention relates to a thermoplastic composition comprising at least one polymer (M) forming a matrix in which are dispersed nodules of (K), nodules of (K) entirely or partly encapsulated in at least one polymer (S) and nodules of (S) and such that the nodules of (K) entirely or partly encapsulated in (S) are smaller than the nodules of (S).Type: GrantFiled: August 27, 1998Date of Patent: May 29, 2001Assignee: AtofinaInventors: Thibaut Montanari, Chrystelle Guibouin, Marius Hert, Patrice Perret, Jacques Thomasset
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Patent number: 6235810Abstract: A method for the preparation of latexes with hollow polymer particles useful as opacifying agents. The process comprises the preparation of hollow polymer particle latex by emulsion copolymerization with water soluble initiator and anionic surfactant as follows: a) preparation of seed latex of copolymer containing methyl methacrylate and methacrylic acid; b) preparation of latex of highly carboxylated copolymer containing methyl methacrylate and a cross-linking agent and optionally a vinyl aromatic compound; c) using highly carboxylated latex synthesized at stage b) in the preparation of the intermediate shell comprising a copolymer of methyl methacrylate, acrylic acid ester, a cross-linking agent and optionally vinyl aromatic compound, said intermediate shell copolymer having a glass transition temperature below 80° C.Type: GrantFiled: November 22, 1999Date of Patent: May 22, 2001Assignee: Neste Chemicals OYInventors: Valery Pavlyuchenko, Nina Byrdina, Sergey Ivanchev, Mikael Skrifvars, Erkki Halme, Hanna Laamanen, Jukka Koskinen
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Patent number: 6228971Abstract: Novel imine functional copolymers are provided containing a plurality of groups of the structure: where R1 is hydrogen or methyl; R2 is hydrogen or an alkyl group having from about 1 to about 10 carbon atoms; R3 is an alkyl or aryl group having from about 1 to about 10 carbon atoms, or R3 is bonded to R2 and forms part of a five- or six-membered ring; and Y is a divalent linking group having from about 3 to about 15 carbon atoms. The composition is useful in film-forming compositions curable at ambient temperature and above.Type: GrantFiled: June 21, 1999Date of Patent: May 8, 2001Assignee: PPG Industries Ohio, Inc.Inventors: Jonathan T. Martz, Joseph M. Carney, Robert E. Jennings
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Patent number: 6225372Abstract: Particles have a hydrophilic core, for instance including an enzyme and a polymer, surrounded by a shell formed by interfacial condensation polymerisation in the presence of a polymeric stabiliser. Preferably the polymeric stabiliser is a random copolymer which will concentrate at the interface between oil and water and association by ionic interaction, condensation or otherwise is achieved between the stabiliser and one of the reactants before reaction with the other reactant. Dispersions of aqueous capsules in an aqueous medium are also disclosed.Type: GrantFiled: February 17, 1998Date of Patent: May 1, 2001Assignee: Ciba Speciality Chemicals Water Treatments, LimitedInventors: Mads Lykke, Kishor Kumar Mistry, Ole Simonsen, Kenneth Charles Symes
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Patent number: 6221498Abstract: An antifouling silicone emulsion coating-composition comprising following components (A), (B), (C) and (D), an amount of the component (C) incorporated being in the range of 5 to 80% by weight relative to the total solid contents in the composition: (A) partially hydrolyzed organosiloxane with a weight-average molecular weight of 600 to 5,000 (determined using a polystyrene calibration curve), represented by the average formula (I): R2aSiOb(OR1)c(OH)d wherein R1 and R2 represent a monovalent hydrocarbon group; a, b, c and d are numerals satisfying the following relationships: a+2b+c+d=4, 0≦a<3, 0<b<2, 0<c<4, and 0<d<4; (B) nonionic or anionic surface active agent; (C) photo-semiconductor; and (D) water.Type: GrantFiled: January 11, 1999Date of Patent: April 24, 2001Assignee: Matsushita Electric Works, Ltd.Inventors: Koichi Takahama, Takeyuki Yamaki, Minoru Inoue, Akiharu Goto, Junko Ikenaga, Hirotsugu Kishimoto
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Patent number: 6214927Abstract: A method is provided for making aqueous emulsions of functionalized organopolysiloxane particles having a volume average particle diameter in a range between about 300 nanometers to about 1 micron. The aqueous silicone emulsions can be employed as part of a coating composition, for example, a shampoo, to impart improved surface characteristics.Type: GrantFiled: November 2, 1999Date of Patent: April 10, 2001Assignee: General Electric CompanyInventors: Daniel Horace Craig, Wayne Francis Morgan
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Patent number: 6214928Abstract: Aqueous emulsions of amine functionalized organopolysiloxane particles useful in personal care applications and methods for making are described. Useful compositions can be made by contacting at elevated temperatures, aqueous emulsions of organopolysiloxane particles having a volume average particle diameter in a range between about 300 nanometers and about 1 micron with an amine functionalized organosilicon source material, such as an aminoorganopolyalkoxysilane or an aminoorganopoly(diorganosiloxane) fluid.Type: GrantFiled: November 2, 1999Date of Patent: April 10, 2001Assignee: General Electric CompanyInventors: Daniel Horace Craig, Wayne Francis Morgan
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Patent number: 6211316Abstract: TADDOL dendrimers are described. Their use as crosslinkers in polymerisation reactions and the use of Ti salts of polymer-bound TADDOL dendrimers as catalysts in enantioselective addition reactions is disclosed.Type: GrantFiled: October 28, 1997Date of Patent: April 3, 2001Assignee: Novartis AGInventor: Dieter Seebach
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Patent number: 6191193Abstract: A method for separating poly(vinyl acetate) particles having various particle sizes, which have been prepared by suspension polymerization of vinyl acetate monomers, into respective microspheric poly(vinyl acetate) particles with uniform particle size distribution by the use of inorganic salt as a dispersing and antistatic agent, a method for preparing the microspheric embolic particles of a dual structure consisting of poly(vinyl acetate) core/poly(vinyl alcohol) shell by suspending the separated poly(vinyl acetate) particles into an aqueous alkali solution and subjecting the suspended particles to a heterogeneous surface saponification and the microspheric embolic particles prepared.Type: GrantFiled: July 27, 2000Date of Patent: February 20, 2001Assignee: Korea Institute of Science & TechnologyInventors: Chul-Joo Lee, Won-Seok Lyoo, Ick-Chan Kwon, Se-Geun Lee, Jae-Pil Kim, Moon-Hee Han
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Patent number: 6180693Abstract: Core/shell particles comprising a core comprising an elastomer having a TG value of <0° C., onto which a shell of a crosslinked copolymer is grafted, where the proportion of the crosslinking component in the copolymer of the shell is from 5 to 90% by weight, based on the total amount of the comonomers of the shell copolymer, are suitable as toughening agents for epoxy resins, with which they have good compatibility.Type: GrantFiled: September 3, 1999Date of Patent: January 30, 2001Assignee: Vantico Inc.Inventors: Qian Tang, Martin Roth, Dean Tallak Behm, Carl Walter Mayer, Klaus Petschel, Sameer Hosam Eldin
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Patent number: 6162867Abstract: The invention relates to thermoplastic molding compositions comprisingA) from 30 to 98% by weight of a graft copolymer comprisinga.sub.K) from 30 to 90% by weight of an elastomeric graft core,a.sub.S) from 10 to 70% by weight of a graft shell comprisinga.sub.S /1) from 50 to 100% by weight of a styrene compound or a C.sub.1 -C.sub.8 -alkyl acrylate or methacrylate, or a mixture thereof, anda.sub.S /2) from 0 to 50% by weight of one or more other monomers,B) from 1 to 50% by weight of a thermoplastic polymer andC) from 1 to 70% by weight of an elastomeric block copolymer prepared by anionic polymerization of the monomers with addition of a potassium compound soluble in non-polar solvents (Step 1) followed by hydrogenation of all or virtually all the olefinic double bonds of the polymer obtained in Step 1, as described in greater detail herein.Type: GrantFiled: March 17, 1999Date of Patent: December 19, 2000Assignee: BASF AktiengesellschaftInventors: Norbert Guntherberg, Konrad Knoll, Martin Weber, Gerhard Lindenschmidt
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Patent number: 6147142Abstract: Previously cross-linked silicone elastomer particles with an organic-polymer shell are used as constituents for formulating aqueous coating compositions based on water-soluble or water-dilutable binders. The silicone elastomer particles contain: (a) 5 to 95% by weight, with respect to the total weight of the copolymer, of a nuclear polymer of general formula (R.sub.2 SiO.sub.2/2).sub.x (RSiO.sub.3/2).sub.y (SiO.sub.4/2).sub.z, in which x=5 to 99.5% by mole, y=0.5 to 95% by mole, z=0 to 30% by mole, and (b) 5 to 95% by weight, with respect to the total weight of the copolymer of a shell made of an organopolymer from mono- or poly-ethylenically unsaturated monomers; and R stands for the same or different monovalent alkyl or alkenyl radicals with 1 to 6 carbon atoms, aryl radicals or substituted hydrocarbon radicals.Type: GrantFiled: September 28, 1998Date of Patent: November 14, 2000Assignee: Wacker-Chemie GmbHInventors: Michael Geck, Walter Goeblmeier, Bernward Deubzer, Ekkehard Patrick, Helmut Oswaldbauer
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Patent number: 6136884Abstract: A latex composition for hair care containing a hybrid-graft copolymer of a sulfopolyester and an acid-functional polymer segment. The acid-functional polymer segment is formed from at least one acid-functional monomer, at least one ethylenically unsaturated monomer, and at least one amide-containing monomer. Such compositions exhibit superior curl retention even at high humidity.Type: GrantFiled: January 30, 1998Date of Patent: October 24, 2000Assignee: Eastman Chemical CompanyInventors: Robert Gow-Sheng Chen, Phillip Michael Cook
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Patent number: 6136948Abstract: A laser-sinterable powder product has been prepared having unique properties which allow the powder to be sintered in a selective laser sintering machine to form a sintered part which is near-fully dense. For most purposes, the sintered part is indistinguishable from another part having the same dimensions made by isotropically molding the powder. In addition to being freely flowable at a temperature near its softening temperature, a useful powder is disclosed that has a two-tier distribution in which substantially no primary particles have an average diameter greater than 180 .mu.m, provided further that the number average ratio of particles smaller than 53 .mu.m is greater than 80%, the remaining larger particles being in the size range from 53 .mu.m to 180 .mu.m. A powder with slow recrystallization rates, as evidenced by non-overlapping or slightly overlapping endothermic and exothermic peaks in their differential scanning calorimetry characteristics for scan rates of on the order of 10.degree. C. to 20.Type: GrantFiled: July 14, 1997Date of Patent: October 24, 2000Assignee: DTM CorporationInventors: Elmer Douglas Dickens, Jr., Biing Lin Lee, Glenn Alfred Taylor, Angelo Joseph Magistro, Hendra Ng, Kevin P. McAlea, Paul F. Forderhase
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Patent number: 6133343Abstract: A cured product of a resinous composition for dental use is neither stained nor discolored while used in the mouth for long periods of time. In addition, the cured product of the composition is not discolored with hot water, and its impact strength is high. The composition is easy to handle, and its storage stability is good. The composition comprises (a) an impact-resistant resinous complex composed of a (meth)acrylic polymer and core-shell structured polymer particles having at least one hard polymer layer, at least one soft polymer layer and an outermost hard polymer layer, wherein the impact-resistant resinous complex contains ionic components in an amount not larger than 0.05% by weight of the resinous composition, (b) (meth)acrylate monomer, and (c) a polymerization initiator.Type: GrantFiled: March 31, 1998Date of Patent: October 17, 2000Assignee: Kuraray Co., Ltd.Inventors: Kenji Hatanaka, Satoshi Yamaguchi, Mitsuo Otani
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Patent number: 6133349Abstract: Compositions which have substantial weatherability and impact resistance include a substantially uniform blend of (1) a physical mixture of an uncross-linked acrylonitrile/styrene copolymer and a cross-linked alkyl acrylate/graft (meth)acrylate copolymer; and (2) a filler component, preferably wood, in an amount effective as a filler in the composition. Methods for making such compositions include forming a substantially uniform physical blend of such copolymers and filler component. The compositions preferably are substantially free of cross-linked acrylonitrile/styrene copolymer.Type: GrantFiled: September 29, 1998Date of Patent: October 17, 2000Assignee: Hughes Processing, Inc.Inventor: Roderick E. Hughes
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Patent number: 6130290Abstract: Impact modifiers that produce transparent, high Dynatup impact strength blends with amorphous, aromatic polyesters are described. The impact modifiers are core-shell polymers with (A) a core composed principally of rubbery polymers, such as copolymers of diolefins with vinyl aromatic monomers, such as copolymers of butadiene with styrene, (B) an intermediate stage composed principally of hard polymers, such as polymers or copolymers of vinyl aromatic monomers, and (C) a shell composed principally of vinyl aromatic copolymers that contain hydroxyl functional groups or their equivalents (e.g. styrene/hydroxyalkyl (meth)acrylate copolymers).Type: GrantFiled: March 26, 1999Date of Patent: October 10, 2000Assignee: Rohm and Haas CompanyInventors: Edward Joseph Troy, Joseph John Ryan
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Patent number: 6127478Abstract: A melt-mixed blend of polyamide and grafted fluoropolymer having polar functionality exhibits surprisingly low permeability and can bond to fluoropolymer or polyamide without an intervening adhesive layer. The blend is useful as a component of laminates, such as fuel hose.Type: GrantFiled: January 22, 1999Date of Patent: October 3, 2000Assignee: E. I. du Pont de Nemours and CompanyInventor: Peter Dwight Spohn
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Patent number: 6127456Abstract: The invention relates to a thermoplastic composition comprising at least one polymer (M) forming a matrix in which are dispersed nodules of at least one polymer (K) which are encapsulated in at least one polymer (S) in such a way that these encapsulated nodules are smaller than the nodules of the polymer (S) which are dispersed in the matrix (M).Type: GrantFiled: May 22, 1998Date of Patent: October 3, 2000Assignee: Elf Atochem SAInventors: Thibaut Montanari, Chrystelle Guibouin, Marius Hert, Patrice Perret, Jacques Thomasset
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Patent number: 6121365Abstract: Polymer fine particles are obtained by emulsion-polymerizing one or more monomers having a carboxylate group represented by the following formula and an unsaturated group that is radical polymerizable:--COO.sup.- X.sup.+ (I)wherein in the formula (I), X.sup.+ is one species selected from the group consisting of monovalent metal ion, ##STR1## wherein R.sub.1 to R.sub.5 may be the same or different, representing hydrocarbon groups having a number of carbon atom or atoms of 1 to 4 respectively. Alternatively, polymer fine particles may be obtained by performing emulsion polymerization in the presence of a compound containing the foregoing carboxylate group. In the obtained polymer fine particles, the carboxylate group is incorporated into surfaces of the fine particles by the aid of covalent bond or physical adsorption. Metallic parts such as those contained in a printer are not corroded owing to the presence of the carboxylate group on the surfaces of the fine particles.Type: GrantFiled: December 30, 1998Date of Patent: September 19, 2000Assignee: Hitachi Maxell, Ltd.Inventors: Shouji Saibara, Kouji Takazawa
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Patent number: 6084009Abstract: A thermosetting powder paint composition comprising:(A) a (meth)acrylic copolymer having glycidyl groups;(B) a polybasic carboxylic acid and/or polybasic carboxylic anhydride; and(C) particles having a core/shell structure each comprising a core having Tg of 20.degree. C. or below, the core being covered at least partially with a shell having Tg of 40.degree. C. or above, and said shell having no glycidyl group.The paint composition is excellent in weather resistance as well as in impact resistance and chipping resistance.Type: GrantFiled: April 23, 1997Date of Patent: July 4, 2000Assignee: Mitsui Chemicals, Inc.Inventors: Mitsuyuki Mizoguchi, Yoshiro Fuseya, Yoshihiro Fujita, Yukiatsu Ishino, Masashi Seki, Takahisa Miyawaki
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Patent number: 6051656Abstract: An elastomeric acrylate copolymer which contains, as polymerized units, comonomers having chemically reactive groups is prepared for the preparation of molding materials having good weathering resistance, improved impact strength and good flow properties. This copolymer is dissolved or swollen in monomers such as styrene and acrylonitrile, forming hard graft shells. After the addition of monomers and/or polymers having chemically reactive groups and, if required, after the addition of a chemically reactive crosslinking agent, the resulting monomer/copolymer mixture is subjected to graft polymerization, which is carried out up to a conversion of more than 15% by weight of the monomers, by thermal or free radical mass or solution polymerization. The molding materials can be used as dulling agents for polymer blends.Type: GrantFiled: October 8, 1998Date of Patent: April 18, 2000Assignee: BASF AktiengesellschaftInventors: Graham Edmund Mc Kee, Bernhard Rosenau, Walter Heckmann
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Patent number: 6037392Abstract: Core/shell particles comprising a core comprising an elastomer having a T.sub.G value of <0.degree. C., onto which a shell of a crosslinked copolymer is grafted, where the proportion of the crosslinking component in the copolymer of the shell is from greater than 5 to 90% by weight, based on the total amount of the comonomers of the shell copolymer, are suitable as toughening agents for epoxy resins, with which they have good compatibility.Type: GrantFiled: November 21, 1996Date of Patent: March 14, 2000Assignee: Ciba Specialty Chemicals Corp.Inventors: Qian Tang, Martin Roth, Dean Tallak Behm, Carl Walter Mayer, Klaus Petschel, Sameer Hosam Eldin
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Patent number: 6031047Abstract: Poly(vinyl chloride), when impact modified with a core/shell acrylic impact modifier whose shell is predominantly formed from 50-90 parts of polymerized units of methyl methacrylate and 10-50 parts of polymeric units of a C.sub.2 -C.sub.8 alkyl acrylate and whose core is a crosslinked copolymer mainly of polymeric units of butyl acrylate, exhibits improved fusion behavior, allowing conversion to an intimate, fused, processable blend at lower temperatures and faster rates, than when the shell of the impact modifier is substantially formed from methyl methacrylate alone.Type: GrantFiled: December 30, 1997Date of Patent: February 29, 2000Assignee: Rohm and Haas CompanyInventors: Jean Marie Brady, Steven Richard Rapacki
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Patent number: 6020438Abstract: An emulsion polymer comprising as one of its components a graft copolymer of a residual aromatic monomer-free support resin polymer and a vinyl chloride (co)polymer is disclosed. The emulsion polymer is prepared using a two-stage process. In the first stage, a chasing monomer is reacted in the presence of a support resin polymer having at least one aromatic monomer to form an polymer which is free of residual monomer and has monomeric units derived from the aromatic monomer(s). In a second stage, the vinyl chloride emulsion (co)polymer is made in situ in a reaction mixture comprising the polymer which is free of residual monomer. An extensive grafting at the second stage yields a novel water dispersible graft copolymer containing both styrene and vinyl chloride.Type: GrantFiled: June 9, 1998Date of Patent: February 1, 2000Assignee: The B. F. Goodrich CompanyInventors: Alexander V. Lubnin, John E. Fitzwater, Vic Stanislawczyk, Michael W. Topp
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Patent number: 6020435Abstract: A process for preparing multi-stage emulsion polymers is provided. The process is capable of producing multi-stage emulsion polymers having low dry-bulk density. These polymers are useful in coating compositions such as paints and paper coatings.Type: GrantFiled: November 20, 1997Date of Patent: February 1, 2000Assignee: Rohm and Haas CompanyInventors: Robert Mitchell Blankenship, James Keith Bardman
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Patent number: 6017998Abstract: The present invention discloses a stable aqueous polyurethane dispersions comprising a reaction product of a water dispersible isocyanate-terminated polyurethane prepolymer (A), an aqueous polyurethane dispersion (B) and water, and a method wherein a water dispersible isocyanate-terminated polyurethane prepolymer (A) is dispersed in at least one aqueous polyurethane dispersion (B) and water, and reacted at about 35.degree. C. to about 95.degree. C. until substantially free of isocyanate. The inventive dispersions are useful in adhesives, coatings, binders, primers and sizers.Type: GrantFiled: June 17, 1998Date of Patent: January 25, 2000Assignee: H.B. Fuller Licensing & Financing,Inc.Inventors: Youlu Duan, Yi Wei, Yuduo Zhu, Sonja E. Stammler, Brian L. Marty, Gary J. Haider, Ronald R. Davies, Michael J. Maksymkiw
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Patent number: 6013324Abstract: A sprayable aqueous coating composition for motor vehicles comprising an aqueous dispersion of addition polymer microparticles having a crosslinked core and a non-crosslinked stabilising mantle containing acid groups, characterised in that the crosslinked core comprises: i) a crosslinked inner core of an addition polymer and ii) a crosslinked outer core of addition polymer which is made from at least 10% by weight of monomers having a solubility in water of less than 0.1% by weight ratio of the inner core to the outer core being in the range 10:90 to 90:10.Type: GrantFiled: July 30, 1998Date of Patent: January 11, 2000Assignee: Imperial Chemical Industries PLCInventors: Andrew Frangou, James William Casper, Deepak Gogna, William James Highcock
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Patent number: 5990267Abstract: The present invention relates to an optical fiber (1) comprising an optical core (2) for guiding the majority of the lightwaves transmitted by the fiber, and surrounded by optical cladding (3), itself surrounded by a protective covering (4) of a plastics material, characterized in that the plastics material (4) is a reversibly cross-linked material.Type: GrantFiled: October 30, 1997Date of Patent: November 23, 1999Assignee: Alcatel CableInventor: Christopher McNutt
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Patent number: 5981659Abstract: The invention relates to the use of precrosslinked silicone elastomer particles with an organopolymer shell as the formulation constituent in powder coating material compositions based on thermoplastic or thermosetting binding agents, the silicone elastomer particles containing (a) 5 to 95% by weight, in relation the total weight of the copolymerisate, of a nucleus polymer of the general formula (R.sub.w SiO.sub.2/2).sub.x.(RSiO.sub.3/2).sub.y.(SiO.sub.4/2).sub.z with x=5 to 99.5 mol %, y=0.5 to 95 mol %, z=0 to 30 mol %, and (b) 5 to 95% by weight, in relation to the total weight of the copolymer, of a shell made of an organopolymer of ethylenically mono or multi-unsaturated monomers, R standing for identical or different monovalent C.sub.1 -C.sub.6 alkyl or alkenyl residues or substituted hydrocarbon residues.Type: GrantFiled: March 6, 1998Date of Patent: November 9, 1999Assignee: Wacker-Chemie GmbHInventors: Michael Geck, Walter Goeblmeier, Bernward Deubzer, Ekkehard Patrick
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Patent number: 5973029Abstract: Corrosion-resistant latex coatings comprising a diphenyl sulfonate surfactant and a salt of 2-acrylamido-2-methylpropane sulfonic acid.Type: GrantFiled: October 12, 1993Date of Patent: October 26, 1999Assignee: The Sherwin-Williams CompanyInventors: Shui-Jen R. Hsu, Chia-Tien Chen
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Patent number: 5969030Abstract: The present invention is a waterborne coating composition comprising a hydrophobically modified emulsion polymer and a process therefore. The emulsion polymer is formed by first combining hydrophobic polymeric compound and .alpha.,.beta.-ethylenically unsaturated monomer, to form a mixture and subjecting the mixture to high stress techniques to form surfactant stabilized particles of the hydrophobic polymer and monomers, in the aqueous phase. The .alpha.,.beta.-ethylenically unsaturated groups within the particles are co-polymerized to form a hydrophobically modified core polymer. Additional monomers including at least one .alpha.,.beta.-ethylenically unsaturated hydrophilic monomer are then added to the core polymer and polymerized by emulsion polymerization, to form a hydrophobically modified emulsion polymer. To form a coating composition, additional components such as pigments, crosslinkers, plasticizers and solvents are added. The coating is applied to a substrate to form a coated article.Type: GrantFiled: July 24, 1995Date of Patent: October 19, 1999Assignee: BASF CorporationInventor: Sunitha Grandhee
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Patent number: 5962591Abstract: There is a need for halogen-free polymeric compositions which offer increased heat and ultraviolet light resistance for utilization in automotive interiors. For instance, it is particularly critical for polymers which are utilized in making skin compounds for automotive instrument and door panels to display excellent heat and ultraviolet light resistance.Type: GrantFiled: August 26, 1997Date of Patent: October 5, 1999Assignee: The Goodyear Tire & Rubber CompanyInventors: Hung Dang Ngoc, Bernard Louis Marie Nigen
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Patent number: 5962139Abstract: An epoxy resin molding material comprising an epoxy resin, a phenolic resin and a powder flexibilizer which has a core-shell structure composed of a solid silicone core and an organic polymer shell is an epoxy resin molding material for sealing electronic parts.Type: GrantFiled: January 29, 1998Date of Patent: October 5, 1999Assignees: Hitachi Chemical Co., Ltd., Wacker-Chemie GmbHInventors: Shinsuke Hagiwara, Hiroyuki Saitoh, Hiroki Sashima, Peter Huber, Bernward Deubzer, Michael Geck
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Patent number: 5959003Abstract: The present invention provides particulate aqueous polyurethane dispersions and a process for producing the same. Two diverse polyols are reacted with two different amount of hydrophilic group-containing dihydric alcohols to obtain a hydrophobic prepolymer and a hydrophilic prepolymer respectively, and the two prepolymers obtained are together dispersed in water. After chain-extending the dispersed prepolymers, core-shell aqueous polyurethane dispersions are produced, wherein the shell is made from the hydrophilic prepolymer and the core is made from the hydrophobic prepolymer. The polyurethane product made from the aqueous polyurethane dispersions of the invention has superior solvent resistance and can be employed in industrial coating or surface treatment of leather or textiles.Type: GrantFiled: August 19, 1997Date of Patent: September 28, 1999Assignee: Industrial Technology Research InstituteInventors: Huey-Huey Lo, Yi-Hung Jan, Huey-Zong Wen, Wen-Jiunn Chen, Nien-Shi Chang