Patents Examined by Wu C. Cheng
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Patent number: 5780062Abstract: The present invention is concerned with the formation of small particles of organic compounds by precipitating said organic compounds in an aqueous medium containing polymer/amphiphile complexes. The process is preferably used to prepare a readily soluble pharmaceutically active compound.Type: GrantFiled: November 27, 1995Date of Patent: July 14, 1998Assignee: The Ohio State University Research FoundationInventors: Sylvan Frank, Jan-Erik Lofroth, Levon Bostanian
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Patent number: 5780668Abstract: X-ray opaque esters or amides of iodosubstituted benzoic acid according to formula I and polymers and dental materials produced therefrom. ##STR1## R.sup.1 =hydrogen or C.sub.1 to C.sub.3 alkyl, preferably H or CH.sub.3 ; R.sup.2 =straight-chain or branched C.sub.1 to C.sub.6 alkylene, oxyalkylene or arylene, preferably C.sub.2 to C.sub.4 alkylene and particularly preferably --CH.sub.2 --CH.sub.2 -- and --CH.sub.2 CH(--)CH.sub.2 --;X=O or NH, preferably O;R.sup.3 -R.sup.7 =at least 3 iodine substituents, preferably in R.sup.3, R.sup.4 and R.sup.6 or R.sup.3, R.sup.5 and R.sup.7 position, the other groups are hydrogen, C.sub.1 to C.sub.6 alkyl, C.sub.1 to C.sub.6 alkoxy, --Cl, --Br, --OH, --NH.sub.2, --N(C.sub.1 to C.sub.6 alkyl).sub.2 or --NH--CO--(C.sub.1 to C.sub.6 alkyl), preferably R.sup.3, R.sup.4, and R.sup.6 are=I and R.sup.5 and R.sup.7 =H, or R.sup.3, R.sup.5 and R.sup.7 =I and R.sup.4 and R.sup.6 =--NH(COCH.sub.3);n=1, 2 or 3, preferably 1 or 2.Type: GrantFiled: May 25, 1995Date of Patent: July 14, 1998Assignee: Ivoclar AGInventors: Volker Rheinberger, Norbert Moszner, Ulrich Salz
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Patent number: 5780544Abstract: This invention discloses heat sensitizable latices and a process for synthesizing heat sensitizable latices. This invention more specifically discloses a process for preparing a heat sensitizable latex which comprises the steps of (1) polymerizing at least one conjugated diolefin monomer in an aqueous polymerization medium by free radical polymerization in the presence of an emulsifier system which is comprised of a fatty ethoxylated monomaleate and optionally an alkyl monomaleate to produce a first latex composition; and (2) adding a water soluble organically modified polysiloxane to the first latex composition to produce the heat sensitizable latex. The present invention further discloses a heat sensitizable latex composition which is comprised of (1) at least one rubbery polymer; (2) water; (3) an emulsifier system which is comprised of a fatty ethoxylated monomaleate and optionally an alkyl monomaleate; and (4) at least one water-soluble organically modified polysiloxane.Type: GrantFiled: March 5, 1997Date of Patent: July 14, 1998Assignee: The Goodyear Tire & Rubber CompanyInventors: Fabienne Arlette Francoise Rouviere, Pascale Francine Jeanne Muller
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Patent number: 5777051Abstract: Silacyclobutene monomers, and polymers based on silacyclobutene building blocks, exhibit photoluminescence in the blue region of the visible spectrum when excited by ultraviolet light.Type: GrantFiled: June 16, 1997Date of Patent: July 7, 1998Assignee: Dow Corning CorporationInventors: Norbert Auner, Udo C. Pernisz
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Patent number: 5773545Abstract: Polymers of alkyl-1-vinylimidazoles, a process for preparing polymers of alkyl-1-vinylimidazoles by free-radical polymerization of a monomer mixture comprising(a) 10-100% by weight of at least one alkyl-1-vinylimidazole and(b) 0-90% by weight of 1-vinylpyrrolidone, 1-vinylcaprolactam, 1-vinyltriazole, 1-vinylimidazole, 1-vinyloxazolidinone or mixtures thereof,(c) 0-30% by weight of other monoethylenically unsaturated monomers and(d) 0-10% by weight of a monomer containing at least 2 monoethylenic double bondsin water, at least one C.sub.1 -C.sub.4 -alcohol or mixtures thereof, and the use of polymers which comprise at least 10% by weight of an alkyl-1-vinylimidazole as copolymerized unit as additive to detergents to inhibit transfer of dyes during the washing process.Type: GrantFiled: May 20, 1996Date of Patent: June 30, 1998Assignee: BASF AktiengesellschaftInventors: Christian Schade, Hans-Ulrich Jager, Jurgen Detering
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Patent number: 5772894Abstract: Disclosed are the Rhodamine B esters of hydroxy C.sub.2 -C.sub.6 lower alkyl acrylates. Specifically, the hydroxy lower alkyl radical is a linear hydroxy lower alkyl radical having the hydroxy group attached to the terminal carbon atom. Also shown are copolymers of diallyldimetyl ammonium chloride which contains from 0.01-2 mole percent of these Rhodamine B esters and their use in treating industrial waters.Type: GrantFiled: July 17, 1996Date of Patent: June 30, 1998Assignee: Nalco Chemical CompanyInventors: William J. Ward, Jeffrey R. Cramm, Peter E. Reed, Brian S. Johnson
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Patent number: 5773534Abstract: An improved method of free radical polymerization conducted in the presence of a relatively low molecular weight macromonomer such as can be made with a metal chelate chain transfer catalyst. This method has various uses, including reducing the molecular weight of a variety of crosslinkable polymers and copolymers.Type: GrantFiled: November 7, 1996Date of Patent: June 30, 1998Assignee: E. I. du Pont de Nemours and CompanyInventors: Joseph A. Antonelli, Charles T. Berge, Michael J. Darmon, Christopher E. Murphy
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Patent number: 5770346Abstract: There is provided a photoresist including (a) a resin composed of a polymer having a compound represented with the following general formula ?1! within a structural unit thereof, and (b) a photo acid generator. ##STR1## wherein R.sup.1 represents a hydrogen atom, R.sup.2 represents a divalent hydrocarbon group including a bridged cyclic hydrocarbon group and having a carbon number in the range of 7 to 13 both inclusive, R.sup.3 and R.sup.4 represent a hydrocarbon group having a carbon number of 1 or 2, and R.sup.5 represents one of (a) a hydrocarbon group having a carbon number of 1 to 12, (b) a hydrocarbon group having a carbon number of 1 to 12 and replaced with an alkoxy group having a carbon number of 1 to 12, and (c) a hydrocarbon group having a carbon number of 1 to 12 and replaced with an acyl group having a carbon number of 1 to 13. The above mentioned photoresist produces no extra polymer by side reaction.Type: GrantFiled: December 10, 1996Date of Patent: June 23, 1998Assignee: NEC CorporationInventors: Shigeyuki Iwasa, Kaichiro Nakano, Katsumi Maeda, Takeshi Ohfuji, Etsuo Hasegawa
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Patent number: 5770670Abstract: Novel unsaturated peroxides useful as molecular weight regulators in polymerization reactions are disclosed. Also disclosed are a polymerization process employing these novel unsaturated peroxides as molecular weight regulators, polymers and oligomers made by this process and articles of manufacture comprising one or more polymers or oligomers made by this process. These molecular weight regulating peroxides provide the ability to introduce an epoxy functionality to the oligomer or polymer as well as an additional functionality. Further, omega (di) substituted or alpha, omega disubstituted polymers may be synthesized using the unsaturated peroxides of the present invention.Type: GrantFiled: May 1, 1997Date of Patent: June 23, 1998Assignee: E.I. duPont de Nemours & Co.Inventors: Luc Louis Theophile Vertommen, John Meijer, Bernard Jean Maillard
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Patent number: 5770760Abstract: Novel aqueous thickener or thixotropic polymers are prepared by the copolymerization of (A) about 15-60 weight percent of a C.sub.3 -C.sub.8 alpha, beta-ethylenically unsaturated carboxylic acid monomer, preferably acrylic or methacrylic acid or a mixture thereof with itaconic or fumaric acid, (B) about 15-80 weight percent of a nonionic copolymerizable C.sub.2 -C.sub.12 alpha, beta-ethylenically unsaturated monomer, preferably a monovinyl ester such as ethyl acrylate or a mixture thereof with styrene, acrylonitrile, vinyl chloride or vinyl acetate, and (C) about 1-30 weight percent of a new and novel nonionic ethylenically unsaturated nonionic biphillic monomer such as tristyrylpoly(ethyleneoxy).sub.x methyl acrylate, to provide a stable aqueous colloidal dispersion at an acid pH lower than about 5.0 but becoming an effective thickener for aqueous systems upon adjustment to a pH of about 5.5-10.5 or higher. These polymers adjusted to a pH of about 5.Type: GrantFiled: April 2, 1996Date of Patent: June 23, 1998Assignee: Rhodia Inc.Inventor: Fred Robinson
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Patent number: 5770665Abstract: A compound for effecting molecular weight control in polymerisation is a CoII chelate of formula, wherein each group R is an organic cyclic group which, independently, is a monovalent group which comprises a cyclic structure or taken together as two adjacent groups provides a divalent group, and wherein further at least one of the groups R includes at least one heteroatom selected from 0, N, S, P, halogen and Si, which heteroatom provides a substituent group or part of a substituent group on the cyclic structure, or a heteroatom of a heterocyclic ring of the cyclic structure; and wherein each group Q is independently selected from F, Cl, Br, OH, C.sub.1-12 alkoxy and C.sub.1-12 alkyl; or being a CoIII analogue of the cobalt II chelate of formula in which the Co atom is additionally covalently bonded to H, a halide or other anion, or a homolytically dissociable organic group. Free-radical polymerication of at least one ethylenically unsaturated monomer is carried out in the presence of such a compound.Type: GrantFiled: August 28, 1996Date of Patent: June 23, 1998Assignee: Zeneca LimitedInventors: David M. Haddleton, Andrew V. G. Muir, Stephen W. Leeming
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Patent number: 5767210Abstract: This process is characterized by the fact that at least one of the said monomers is polymerized or copolymerized in bulk, solution, emulsion or suspension, at a temperature that can be as low as 0.degree. C., in the presence of an initiation system including: at least one compound generating radicals, other than bromofluorene, and at least one catalyst consisting of a complex of palladium in the 0 oxidation state, denoted by the following formula (I): Pd(0)L.sup.1 L.sup.2 L.sup.3 L.sup.4 in which each of L.sup.1, L.sup.2, L.sup.3 and L.sup.4, which are identical or different, denotes a ligand which may be a chiral ligand, which is chosen from PRR'R", P(OR)(OR')(OR"), NRR'R", ORR', SRR', SeRR', AsRR'R", SbRR'R", where each of R, R' and R" independently denotes a C.sub.1 -C.sub.14 alkyl group, optionally substituted, or an optionally substituted aromatic group, it being possible for at least two of these ligands to be joined to one another by one or more divalent radicals.Type: GrantFiled: March 27, 1997Date of Patent: June 16, 1998Assignee: Elf Atochem, S.A.Inventors: Philippe Lecomte, Philippe Dubois, Robert Jerome, Philippe Teyssie, Thierry Senninger
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Patent number: 5767211Abstract: This invention concerns the synthesis of multi-functional hyperbranched polymers by free radical polymerization of di- or tri-vinyl monomers in the presence of a chain transfer catalyst and a non-peroxide free radical initiator. The low viscosity and high functionality of these polymers make them useful for automotive coatings and for photopolymerization applications.Type: GrantFiled: May 1, 1997Date of Patent: June 16, 1998Assignee: E. I. du Pont de Nemours and CompanyInventor: Zhibin Guan
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Patent number: 5763548Abstract: A new polymerization process (atom transfer radical polymerization, or ATRP) based on a redox reaction between a transition metal (e.g., Cu(I)/Cu(II), provides "living" or controlled radical polymerization of styrene, (meth)acrylates, and other radically polymerizable monomers. Using various simple organic halides as model halogen atom transfer precursors (initiators) and transition metal complexes as a model halogen atom transfer promoters (catalysts), a "living" radical polymerization affords (co)polymers having the predetermined number average molecular weight by .DELTA.?M!/?I!.sub.0 (up to M.sub.n >10.sup.5) and a surprisingly narrow molecular weight distribution (M.sub.w /M.sub.n), as low as 1.15. The participation of free radical intermediates in ATRP is supported by end-group analysis and stereochemistry of the polymerization. In addition, polymers with various topologies (e.g.Type: GrantFiled: March 31, 1995Date of Patent: June 9, 1998Assignees: Carnegie-Mellon University, Jin-Shan WangInventors: Krzysztof Matyjaszewski, Jin-Shan Wang
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Copolymerizates of unsaturated carboxylic acids, process for the preparation thereof and use thereof
Patent number: 5760150Abstract: The present invention relates to copolymerizates (A) of unsaturated carboxylic acids, selected from carboxylic acids containing sulfonic acid groups, comonomer mixtures of carboxylic acids containing sulfonic acid groups with dicarboxylic acids, and comonomer mixtures of carboxylic acids containing sulfonic acid groups and/or dicarboxylic acids and their anhydrides, with other unsaturated compounds, in particular monoethylenically unsaturated monocarboxylic acids containing from 3 to 10 carbon atoms. Another embodiment of the invention comprises a process for the preparation of said copolymerizates (A), a mixture of copolymerizates (A) with analogous copolymerizates (B), as well as the use of the above copolymerizates and their mixtures as sequestering agents, complexing agents and co-builders in detergent and cleaning agent industry and as textile treatment aids.Type: GrantFiled: September 30, 1996Date of Patent: June 2, 1998Assignees: TH. Goldschmidt AG, CHT R. Beitlich GmbHInventor: Herbert Bachus -
Patent number: 5760129Abstract: An aqueous polymerization method is disclosed for forming polymers containing, as polymerized units, at least one monomer having low water solubility, including the steps of:(1) complexing at least one monomer having low water solubility with a macromolecular organic compound having a hydrophobic cavity; and(2) polymerizing in an aqueous system from about 0.1% to about 100%, by weight of the monomer component, based on the total weight of the polymer, of the complexed monomer having low water solubility with from about 0% to about 99.9% by weight, based on the total weight of the polymer, of at least one monomer having high water solubility.The method is also useful for forming aqueous solution polymers having low water solubility.Type: GrantFiled: June 24, 1996Date of Patent: June 2, 1998Assignee: Rohm and Haas CompanyInventor: Willie Lau
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Patent number: 5756591Abstract: A network polymer that contains:(a) a plurality of polymer chains which are derived from one or more ethylenically-unsaturated monomer(s), and(b) at least one linking group which links the polymer chains and which contains anhydride, carbonate, or uretidinedione moieties.The network polymer and other network polymers which contain similar dissociating groups are useful in curable formulations which contain a curable compound that contains:(a) a central moiety, and(b) a plurality of reactive groups which are bonded to the central moiety and which react with acid, hydroxyl, or isocyanate moieties liberated by dissociation of the anhydride, carbonate, or uretidinedione moieties.The curable composition builds viscosity more slowly and more controllably during curing than equivalent systems which do not contain the network polymer. It is useful in coatings and other uses for curable compositions.Type: GrantFiled: May 29, 1997Date of Patent: May 26, 1998Assignee: The Dow Chemical CompanyInventors: Duane S. Treybig, Clinton J. Boriack
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Patent number: 5756777Abstract: Disclosed are a novel (meth)acrylate having an alkenyl group, a novel epoxy(meth)acrylate, and processes for the preparation thereof.The (meth)acrylate having an alkenyl group of the present invention can be preferably used as resins for coatings, photo-curable resins, and adhesives by (co)polymerization thereof in the presence or absence of a variety of (meth)acrylic monomers, and the (meth)acrylate compound having an alkenyl group is useful as a silane coupling agent, a starting material for epoxy(meth)acrylates, a modifier for silicone resins, a modifier for unsaturated polyester resins, and a crosslinking agent for acrylic rubbers. The epoxy(meth)acrylate has a well-balanced excellent property between a pot life and reactivity in curing, and it does not contain chlorine, resulting in that a resin therefrom is excellent in an anti-corrosive property and an anti-yellowing property.Type: GrantFiled: October 10, 1995Date of Patent: May 26, 1998Assignee: Daicel Chemical Industries, Ltd.Inventors: Masami Shinohara, Hideki Matsui
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Patent number: 5756605Abstract: A method for the solution or amulsion polymerization of ethylenically unsaturated monomers, styrene, and other free radical polymerizatable monomers in aqueous media in which a cobalt chain transfer agent is used which has both hydrolytic stability and solubility in water and in the organic phase with preferential solubility in the organic phase.Type: GrantFiled: May 5, 1997Date of Patent: May 26, 1998Assignees: E. I. du Pont de Nemours and Company, Commonwealth Scientific and IndustrialInventors: Graeme Moad, Catherine Louise Moad, Julia Krstina, Ezio Rizzardo, San Hoa Thang, Michael Fryd
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Patent number: 5756618Abstract: The present invention relates to a polyol(allyl carbonate) based casting composition suitable for forming high quality ophthalmic lenses which contains an epoxy compound in an amount effective to reduce shrinkage during its final polymerization in a mold. The casting composition of the present invention comprising polyol(allyl carbonate) and epoxy compound contains an initiator for the polymerization of the polyol(allyl carbonate), but does not contain a catalyst for polymerization of the epoxy compound.Type: GrantFiled: February 14, 1997Date of Patent: May 26, 1998Assignee: Akzo Nobel nvInventors: Kenneth Dixon, Mary Ann Kelly