Organic Material Containing Patents (Class 106/491)
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Patent number: 5908498Abstract: A process for preparing a low-dusting, free-flowing pigment which has not been subjected to any micronizing treatment comprising the steps of providing an inorganic pigment material; providing a source of water; forming a fine, well dispersed slurry of the pigment and water; milling the slurry; depositing a treating agent having the formula ROOCCHSO.sub.3 MCH.sub.2 COOR' wherein R and R' are monovalent alkyl radicals having from about 2 to about 20 carbon atoms, and M is a metallic monovalent cation on the slurried milled pigment; and drying the pigment material having a treating agent deposited thereon. The invention also provides the free-flowing pigments produced by this process.Type: GrantFiled: March 31, 1998Date of Patent: June 1, 1999Assignee: Kerr-McGee Chemical LLCInventors: James W. Kauffman, Phillip M. Story, John E. Halko
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Patent number: 5882388Abstract: Coating compositions for making ink jet recording media are disclosed which comprise a mixture of a binder composition comprising a non-cationic water-insoluble binder resin having a surface energy greater than 40 dyn/cm dissolved or dispersed in an alcoholic liquid medium or dispersed in an aqueous liquid medium, the liquid medium having a boiling point less than 150.degree. C. and a viscosity up to 100 kpa:s at 25.degree. C., and hydrophilic pigment particles having a number average particle size in the range from 1-25 microns and an oil absorption of at least 60 g oil/100 g particles, the composition having a pigment particle to binder resin weight ratio in the range from 0.5:1 to 3:1. A recording medium for ink jet printing is also described which may be made using this coating composition, along with a process for making it. A process for making a water-resistant color image on a support material using the described recording medium, along with the product obtainable by that process, is also disclosed.Type: GrantFiled: October 16, 1996Date of Patent: March 16, 1999Assignee: Brady USA, Inc.Inventors: Paul C. Adair, Bruce M. Klemann, Mary J. Janicek
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Patent number: 5855662Abstract: Aqueous pigment preparations comprisinga) 10 to 80% by weight, in particular 20 to 60% by weight, of a pigment,b) 0.1 to 20% by weight, in particular 0.1 to 15% by weight, of an oxyalkylation product which is obtained by addition of optionally substituted styrenes onto optionally substituted phenols and reaction with ethylene oxide and/or propylene oxide,c) 2 to 30% by weight of a polyether-polyol having a boiling point under normal pressure of greater than 150.degree. C. andd) if appropriate further additives, and water as the remainder,which are particularly suitable for pigmenting naturally occurring and synthetic materials, such as emulsion paints, emulsion coatings and emulsion printing inks, have been found.Type: GrantFiled: March 26, 1996Date of Patent: January 5, 1999Assignee: Bayer AktiengesellschaftInventors: Achim Brand, Josef Leitermann, Roger Nyssen, Klaus Schubert, Erhard Schuffenhauer, Karlheinz Wieser, Herbert Wigger
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Patent number: 5843216Abstract: A multicomponent aqueous flowable admixture is formed with silica fume and stabilized with one or more high-range concrete water-reducing agents or one or more ordinary concrete water-reducing agents alone or in combination. The admixture is of particular advantage when added to fresh concrete or mortar to enhance plasticity and workability as compared to conventional concrete or mortar.Type: GrantFiled: December 19, 1990Date of Patent: December 1, 1998Assignee: Elkem Materials Inc.Inventor: Magne D.ang.st.o slashed.l
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Patent number: 5837049Abstract: A treated inorganic solid comprises particulate inorganic material the particles of which are coated with an alkylphosphonic acid or ester thereof, the alkylphosphonic acid containing 6 to 22 carbon atoms. The particulate material is usually a pigment, extender or filler which is treated by mixing with the alkylphosphonic acid or ester for example in an aqueous dispersion or during a process step such as milling. The treated inorganic solid is particularly useful for preparing polymer compositions such as masterbatches.Type: GrantFiled: October 23, 1997Date of Patent: November 17, 1998Assignee: Tioxide Group Services LimitedInventors: Colin Lloyd Watson, Peter James Allen
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Patent number: 5837045Abstract: A surface-modified colored pigment is disclosed which includes a colored pigment having no primary amines and at least one attached hydrophilic organic group, wherein said organic group comprises a) at least one aromatic group, and b) at least one ionic group or ionizable group, or a mixture of an ionic group or an ionizable group. The colored pigment may be blue, brown, cyan, green, violet, magenta, red, orange, yellow, mixtures thereof and the like. The surface-modified colored pigment, due to the hydrophilic groups on its surface, is readily dispersed in a liquid vehicle without the addition of a surfactant or other dispersing aid or additive. The surface-modified color pigment may be used in a variety of aqueous systems including, but not limited to, coatings, paints, papers, adhesives, latexes, inks, toners, textiles and fibers. In addition, an aqueous composition is disclosed including water-based liquid vehicle and the surface-modified colored pigment described above.Type: GrantFiled: June 17, 1996Date of Patent: November 17, 1998Assignee: Cabot CorporationInventors: Joseph E. Johnson, James A. Belmont
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Patent number: 5833746Abstract: A silica filler containing from 30 to 90 wt % of particles having a particle size of at least 30 .mu.m, wherein the roundness of the particles having a particle size of at least 30 .mu.m, is from 0.83 to 0.94.Type: GrantFiled: September 15, 1997Date of Patent: November 10, 1998Assignee: Denki Kagaku Kogyo Kabushiki KaishaInventors: Mitsuyoshi Iwasa, Yukio Sakaguchi, Hirofumi Simazoe
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Patent number: 5776240Abstract: Granules based on silicon dioxide and having the properties:Average particle size: 10 to 120 .mu.mBET surface area: 40 to 400 m.sup.2 /gPore volume: 0.5 to 2.5 ml/gPore size distribution: less than 5% of the total pore volume exists of pores with a diameter<5 nm, remainder are meso- and macroporespH value: 3.6 to 8.5Tapped density: 220 to 700 g/lThey are prepared by dispersing silicon dioxide in water, spray drying, and optionally heating and/or silanizing. The granules can be used as catalyst supports.Type: GrantFiled: February 5, 1996Date of Patent: July 7, 1998Assignee: Degussa AktiengesellschaftInventors: Klaus Deller, Helmfried Krause, Juergen Meyer, Dieter Kerner, Hans Lansink-Rotgerink, Werner Hartmann
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Patent number: 5707439Abstract: Novel silicate minerals that have undergone a cation exhange with at least one heteroaromatic cation comprising a positively charged organo-substituted heteroatom and/or at least one positively charged heteroatom not part of an aromatic ring with at least one bond having a bond order greater than one and compositions comprising the same are described.Type: GrantFiled: December 18, 1995Date of Patent: January 13, 1998Assignee: General Electric CompanyInventors: Tohru Takekoshi, Farid Fouad Khouri, John Robert Campbell, Therese Coste Jordan, Kevin Hsingtao Dai
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Patent number: 5683501Abstract: Compound fine particles include inorganic fine particles and an organic polymer bound to surfaces of the inorganic fine particles, and have an average particle diameter of 5 to 200 nm and a particle diameter variation coefficient of 50% or less. The compound fine particles are obtainable by hydrolyzing and condensing an organic polymer, wherein the organic polymer has, per molecule, at least one polysiloxane group containing at least one Si--OR.sup.1 group, wherein R.sup.1 denotes a hydrogen atom, an unsubstituted or substituted alkyl group, or an unsubstituted or substituted acyl group. A compound fine particle dispersion includes the compound fine particles and a dispersion medium. A composition for forming a film includes this dispersion.Type: GrantFiled: November 4, 1994Date of Patent: November 4, 1997Assignee: Nippon Shokubai Co., Ltd.Inventors: Daijo Tomihisa, Shigefumi Kuramoto, Satoshi Ishida, Tadahiro Yoneda, Masaya Yoshida, Ichiro Namura
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Patent number: 5676748Abstract: A method for producing bulking and opacifying kaolin fillers for filling cellulosic products is disclosed. An aqueous slurry of anionically dispersed kaolin particles is formed at 1 to 30% solids. A low-molecular-weight cationic aggregating agent is then added to the dispersed slurry to selectively aggregate fine and ultra-fine particles. The resultant aggregates are of larger mean particle size than the feed material and contain little or no fine and ultra-fine or colloidal particles. The net charge present on the aggregated particles is lower than that of the feed material. The aggregated structure contains within it a labyrinth of internal voids or pores. These mineral aggregates are then of a suitable size and surface charge to be retained well in a fiber web, and provide added bulk and opacity to the cellulosic products.Type: GrantFiled: December 29, 1995Date of Patent: October 14, 1997Assignee: Columbia River CarbonatesInventor: Alan J. Brown
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Patent number: 5676747Abstract: A method for producing structured calcium carbonate pigments for coating paper is disclosed. An aqueous slurry of anionically dispersed calcium carbonate particles is formed at 1 to 30 percent solids. A low-molecular-weight cationically charged aggregating agent is then added to the slurry to selectively aggregate fine and ultra-fine particles. The resultant aggregates are of larger mean particle size than the mixture of particles in the original slurry and contain little or no fine and colloidal particles. The net charge present on the aggregated particles is lower than that of the original mineral particles. The low solids suspension of the aggregated mineral particles is then dewatered, or increased in solids to form a slurry with a solids content greater than 60 percent by weight.Type: GrantFiled: December 29, 1995Date of Patent: October 14, 1997Assignee: Columbia River CarbonatesInventor: Alan J. Brown
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Patent number: 5676746Abstract: A process is provided for the selective aggregation of the fine and ultrafine particles present in an anionically or cationically dispersed mineral pigment slurry, such that an aggregated structure is formed which contains within it a labyrinth of internal voids or pores, which collectively function as light scattering centers. The aggregates are formed from an assemblage of fine mineral particles, interconnected or bonded together with small quantities of a cationic or anionic polymer or agent of low molecular weight. The resultant aggregates are of larger mean particle size than the feed material and contain little or no fine and colloidal particles. The net charge present on the aggregated particles is lower than that of the feed material. These mineral aggregates are then of a suitable size and surface charge to be retained well in a fiber web by a combination of filtration retention and adsorption retention, and provide added bulk and opacity to the finished sheet of paper.Type: GrantFiled: April 11, 1995Date of Patent: October 14, 1997Assignee: Columbia River CarbonatesInventor: Alan J. Brown
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Patent number: 5672201Abstract: A process for preparing a structured composite pigmentary material comprises forming a dispersion of uncoated particles of titanium dioxide at a pH value at which the particles have a surface charge and subjecting the dispersion to cross-flow filtration until the dispersion contains more than 50% by weight titanium dioxide. The concentrated dispersion is mixed with a dispersion of chemically distinct particles having a surface charge of opposite sign under conditions which ensure that the sign of the surface charge on either of the particulate materials is not reversed. In the resultant composite pigmentary material the titanium dioxide particles are held in association with the chemically distinct particles as a result of said surface charges.Type: GrantFiled: March 5, 1996Date of Patent: September 30, 1997Assignee: Tioxide Group Services LimitedInventors: Leslie Ainsley Simpson, Keith Robson, David Trevor Knight, Ronald Brown
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Patent number: 5667580Abstract: The disclosure describes pigment compositions containing an organic pigment and a transparent filler having a mean particle size less than 10 .mu.m and a narrow particle size distribution; as well as methods of preparing the pigment compositions. The pigment compositions are useful for pigmenting high-molecular-weight organic materials; especially coating compositions, curable ink systems, plastics, as well as for use in laser marking applications.Type: GrantFiled: June 7, 1995Date of Patent: September 16, 1997Assignee: Ciba-Geigy CorporationInventor: Fridolin Babler
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Patent number: 5660622Abstract: A coating composition for ink jet recording sheets, which includes a combination of hydrated amorphous synthetic silica, a synthetic binder, a cationic agent, a leveling-flow modifier, a dispersing agent, an optical brightener, and the remainder being water, is provided. The composition achieves superior brilliance, water fastness, water resistance and improved controlled absorbency of the ink with improved color density.Type: GrantFiled: August 8, 1996Date of Patent: August 26, 1997Inventor: Koyu P. Nikoloff
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Patent number: 5653795Abstract: A method is disclosed for producing bulking and opacifying pigments for filling paper by the selective aggregation of fine particles in an anionically or cationically dispersed slurry, such that an aggregated structure is formed which contains within it a labyrinth of internal voids or pores. The aqueous slurry is formed at one to thirty percent solids. A low molecular weight agent of opposite ionic charge is then added to the slurry to selectively aggregate the fine particles present. The resultant aggregates are of larger mean particle size than the feed material and contain little or no fine and colloidal particles. The net charge present on the aggregated particles is lower than that of the feed material.Type: GrantFiled: November 16, 1995Date of Patent: August 5, 1997Assignee: Columbia River CarbonatesInventor: Alan J. Brown
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Patent number: 5646212Abstract: This invention relates to novel polymeric compounds, more particularly to novel block or graft copolymers which are useful in dispersing inorganic pigments, lakes and/or toners in organic medium, to methods for preparing such copolymers, and to surfactant compositions containing such polymers. The block or graft copolymers of the invention belong to the class in which one type of polymeric component is derived from an oil-soluble complex monocarboxylic acid and another component which is the residue of an alkyl glycol and/or a polyoxyalkylene compounds.Type: GrantFiled: September 2, 1994Date of Patent: July 8, 1997Assignee: ICI Americas Inc.Inventor: Peter Glynn Hibbert
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Patent number: 5609679Abstract: The use of a composition based on silicon dioxide as antiblocking agent is described which is characterized in that it has silicon dioxide having a particle size of 2 to 8 .mu.m, a specific surface of 150 to 850 m.sup.2 /g and a specific pore volume of 1.4 to 2.0 ml/g which has been treated with polyol. This silicon dioxide can be used together with a slip agent as combined antiblocking agent and slip agent. The working-in of the antiblocking agent or of the combined antiblocking agent and slip agent into a polymer is preferably in the form of a masterbatch. A preferred antiblocking agent contains as polyol ethoxylated pentaerythritol in which the pentaerythritol/ethoxy ratio lies in the range from 1:0.5 to 1:25. The antiblocking agent can be obtained by micronizing silicon dioxide to the given particle size and impregnating it with the polyol.Type: GrantFiled: June 7, 1995Date of Patent: March 11, 1997Assignee: W. R. Grace & Co.-Conn.Inventors: Georg L uers, Richard Sobottka, Paul M. Dunn
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Patent number: 5587011Abstract: This invention involves a method of optically whitening clay minerals to transform their natural yellow tint to increased whiteness. Generally, it has been found that clay materials having low cation exchange capability can be directly reacted with very small amounts of cationic dyes, the apparent whiteness of said clay minerals being substantially increased thereby.Type: GrantFiled: April 6, 1995Date of Patent: December 24, 1996Assignee: J. M. Huber CorporationInventors: Carl J. Marshall, Jr., Gary M. Freeman
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Patent number: 5554215Abstract: A composite particulate pigmentary material is disclosed which comprises an association of at least two chemically distinct materials in which the particles of one material carry a positive surface charge and the particles of the second material carry a negative surface charge and particles are held in association as a result of these surface charges. Also disclosed is a method for preparing composite particulate pigmentary material comprising forming aqueous dispersions of two particulate materials under conditions in which the surface charges of the particles of the two materials are of different signs and mixing the dispersions. Typical materials useful for preparing the composite include inorganic pigments, fillers and extenders and organic polymeric microspheres. The product is useful as a pigment in, for example, paints, inks, paper and plastics.Type: GrantFiled: June 7, 1995Date of Patent: September 10, 1996Assignee: Tioxide Specialties LimitedInventors: Leslie A. Simpson, John Robb, Jonathan Banford, Paul F. Dietz, John Temperley
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Patent number: 5472493Abstract: A novel and improved surfactant modified silica and method for making the same. The surfactant modified silica is characterized as a fumed silica having a surfactant material treated therewith. Also disclosed is process of thickening aqueous systems which includes the addition of an effective amount of a fumed silica having a surfactant material treated therewith.Type: GrantFiled: January 9, 1995Date of Patent: December 5, 1995Assignee: Cabot CorporationInventor: David M. Regan
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Patent number: 5401313Abstract: This invention relates to modifying the surface of particles for improved dispersion characteristics in aqueous, solvent, resinous, polymeric, cementitious or the like application systems. In particular, this invention relates to a pigment or filler particle whose surface is coated with at least one electric charge modifying agent and at least one dispersion promoting agent, which has improved dispersibility, coloring, handling, and other processing properties in application systems. The electric charge modifying agent may be selected from the group of Mg, Ca, Ba, Sr, Ti, V, Zr, Cr, Mn, Fe, Co, Ni, Cu, Zn, and Al. The dispersion promoting agent may be selected from the group of stearates, acetates, alkylphenols, cellulosics, waxes, lignins, polyacrylics, polyepoxies, polyurethanes, polyethylenes, polystyrenes and polypropylenes, and polymers having functional groups of alcohols, glycols, aldehydes, amides and carboxylic acids. Iron oxide is the preferred pigment particle.Type: GrantFiled: February 10, 1993Date of Patent: March 28, 1995Assignee: Harcros Pigments, Inc.Inventors: William W. Supplee, James T. Will, Jr.
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Patent number: 5380359Abstract: A melanin-coated pigment obtained by coating a carrier with a readily alkali-soluble natural melanin, and a cosmetic containing the pigment are provided. The melanin-coated pigment is highly safe and has high coloring and high saturation tone, and a cosmetic which contains it is also expected to have ultraviolet-ray-absorbing and anti-oxidizing effects.Type: GrantFiled: November 24, 1993Date of Patent: January 10, 1995Assignee: Kyowa Hakko Kogyo Co., Ltd.Inventors: Shinkichi Honda, Yoichiro Takekoshi, Yoichiro Arai
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Patent number: 5378275Abstract: A water base paint composition containing a mica-containing pigment(s), said composition comprising a water base paint containing a water soluble or water dispersion film-forming polymer selected from among acrylic resin, polyester resin, alkyd resin and polyurethane resin, a cross-linking agent and optional additives such as pigments, thickeners, fillers, etc., wherein a mica-containing pigment(s) comprised of mica flakes or metal-oxide-coated mica flakes with a surface acid content of 0-10 micromol/g, a surface base content of 0-30 micromol/g and a heat of water wetting of 0-1.5 J/g, the surface of which pigment being uniformly coated with melamine resin which has at least one triazine ring per molecule, is uniformly dispersed in said water base paint.Type: GrantFiled: November 15, 1993Date of Patent: January 3, 1995Assignee: Nippon Paint Co., Ltd.Inventors: Ryuichi Shiraga, Teruaki Kuwajima
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Patent number: 5376307Abstract: A coating composition of a perfluorocarbon resin and an electroconductive double shell pigment comprising inner shells of amorphous silica or a silica-containing material and outer shells of antimony-containing tin oxide is useful on a copy roller or belt.Type: GrantFiled: September 3, 1993Date of Patent: December 27, 1994Assignee: E. I. Du Pont de Nemours and CompanyInventors: Minori Hagiwara, Kenji Kiwa, Laurence W. McKeen
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Patent number: 5372795Abstract: The invention relates to a process for continuously hydrophobicizing pyrogenic, finely divided silica, in which the waste gases are fed back to a mixing chamber upstream of the SiO.sub.2 reaction flame.Type: GrantFiled: November 8, 1993Date of Patent: December 13, 1994Assignee: Wacker-Chemie GmbHInventors: Ernst Muhlhofer, Gunter Kratel, Peter Scherm
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Patent number: 5366645Abstract: A modified amorphous silica is described which, apart from optionally present usual additives, comprises 40 to 85 wt-% silica and 60 to 15 wt-% paraffin, silicone or vegetable oil and/or ethylene glycol. The modified amorphous silica is prepared by bringing together, apart from optionally present usual additives, silica with such a quantity of paraffin, silicone or vegetable oil and/or ethylene glycol that the finished, modified silica has a paraffin, silicone or vegetable oil and/or ethylene glycol content of 60 to 15 wt-%. The modified amorphous silica is suitable as an anti-blocking agent, which can be advantageously prepared as concentrate (masterbatch). Surprisingly, upon preparing such a concentrate the melt-flow index hardly falls compared with the melt-flow index of the polyolefin which forms the basis of the concentrate. Thus it is possible to incorporate large quantities of the modified silica into the concentrate in very homogeneous distribution.Type: GrantFiled: May 15, 1992Date of Patent: November 22, 1994Assignee: W. R. Grace & Co.-Conn.Inventor: Richard Sobottka
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Patent number: 5360474Abstract: Colored crystalline alumophosphates and/or silicoalumophsophates of the AEL or VFI type useful as dyes, optical elements and as adsorbents have the following X-ray diffraction diagram:______________________________________ Interplanar spacing Relative intensity d(A) I/I.sub.o .times. 100 ______________________________________ 10.91 .+-. 0.1 26 .+-. 10 9.19 .+-. 0.1 41 .+-. 10 6.79 .+-. 0.05 16 .+-. 10 5.57 .+-. 0.05 52 .+-. 10 4.39 .+-. 0.05 39 .+-. 10 4.18 .+-. 0.05 71 .+-. 10 4.09 .+-. 0.05 33 .+-. 10 3.98 .+-. 0.05 57 .+-. 10 3.86 .+-. 0.05 68 .+-. 10 3.81 .+-. 0.05 100 ______________________________________and a composition described by the following formula:a quinizarin.b Al.sub.2 O.sub.3.c P.sub.2 O.sub.5.d SiO.sub.2where a is from 0.05 to 2, b and c are each from 8 to 12, and d is from 0 to 4.Type: GrantFiled: September 16, 1992Date of Patent: November 1, 1994Assignee: BASF AktiengesellschaftInventors: Guenter Lauth, Ulrich Mueller, Wolfgang Hoelderich, Stefan Brode, Gerhard Wagenblast
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Patent number: 5352277Abstract: A final polishing composition for polishing a silicon wafer used as a substrate crystal in electrical integrated circuits comprises water, colloidal silica, a water-soluble polymeric compound, and a water-soluble salt.Type: GrantFiled: July 26, 1993Date of Patent: October 4, 1994Assignee: E. I. Du Pont de Nemours & CompanyInventor: Shigeo Sasaki
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Patent number: 5344489Abstract: A method of making synthetic color pigments comprises synthesizing monodispersed colloidal core particles by precipitation from a solution and applying dye material to the core particles either by adsorption directly into the core particles or by adsorption or incorporation into alumina fixation shells at the surfaces of the core particles. Additional functional shells may be applied to the dyed core particles for various reasons. The pigments are useful for the coloration of various media such as printing inks and paint compositions.Type: GrantFiled: November 15, 1991Date of Patent: September 6, 1994Assignee: Manfred R. KuehnleInventors: Egon Matijevic, Wan P. Hsu, Manfred R. Kuehnle
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Patent number: 5336311Abstract: This invention relates to structural aggregate pigment products that are cationic, and have improved wet-end retention. A method for converting anionic pigments to cationic pigments is also provided. More particularly, a structural aggregate pigment comprising a clay and/or titanium dioxide or other particulate components, and a functional microgel made from silicon and aluminum or zinc gel formers and a gelling agent such as calcium chloride, can be cationized by adding an effective amount of modified or unmodified epichlorhydrin dimethylamine condensate to a slurry of the structured pigment. The resulting cationic pigments have superior papermaking characteristics and a much improved retention.Type: GrantFiled: July 7, 1992Date of Patent: August 9, 1994Assignee: Nord Kaolin CompanyInventors: Jerry L. Curtis, Kenneth A. Johnson, Lester W. House
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Patent number: 5318628Abstract: A method of making synthetic color pigments comprises synthesizing monodispersed colloidal core particles by precipitation from a solution and applying dye material to the core particles either by adsorption directly into the core particles or by adsorption or incorporation into alumina fixation shells at the surfaces of the core particles. Additional functional shells may be applied to the dyed core particles for various reasons. The pigments are useful for the coloration of various media such as printing inks and paint compositions.Type: GrantFiled: December 4, 1992Date of Patent: June 7, 1994Assignee: Manfred R. KuehnleInventors: Egon Matijevic, Wan P. Hsu, Manfred R. Kuehnle
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Patent number: 5284512Abstract: Water soluble salts of a .beta.-polyaspartic acid, i.e., a polyaspartic acid having predominantly beta linkages in the amino acid residue chain thereof, are eminently well suited as dispersants for particulate matter in an aqueous medium.Type: GrantFiled: February 16, 1993Date of Patent: February 8, 1994Assignee: Donlar CorporationInventors: Larry P. Koskan, Kim C. Low
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Patent number: 5279664Abstract: A method for dispersing a comminuted solid in an aqueous medium is described. An aqueous dispersing agent is added to an aqueous medium in an amount sufficient to disperse the comminuted solid in the aqueous medium. The aqueous dispersing agent includes from about 10 wt. % to about 55 wt. % of an amine compound selected from the group consisting of alkanolamines, triethylamine and morpholine, from about 15 wt. % to about 35 wt. % of a base selected from the group consisting of sodium hydroxide and potassium hydroxide, and from about 0.1 wt. % to about 15 wt. % chelating agent.Type: GrantFiled: December 17, 1991Date of Patent: January 18, 1994Assignee: Angus Chemical CompanyInventors: Glenn N. Robinson, Gregory E. McWright
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Patent number: 5277888Abstract: The invention relates to dispersions of spherical inorganic particles, organic dispersing media having solidification points in the range of 20.degree.-120.degree. C. being used as dispersants.Type: GrantFiled: December 16, 1991Date of Patent: January 11, 1994Assignee: Merck Patent Gesellschaft Beschrankter HaftungInventors: Wilfried Baron, Martin Knapp, Kurt Marquard
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Patent number: 5275652Abstract: A multicomponent aqueous flowable admixture is formed with silica fume and stabilized with one or more high-range concrete water-reducing agents or one or more ordinary concrete water-reducing agents alone or in combination. The admixture is of particular advantage when added to fresh concrete or mortar to enhance plasticity and workability as compared to conventional concrete or mortar.Type: GrantFiled: May 27, 1993Date of Patent: January 4, 1994Assignee: Elkem Materials Inc.Inventor: Magne Dastol
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Patent number: 5234493Abstract: Stable, non-gelling and pumpable aqueous suspensions of precipitated silica particulates, well adapted for the coating of paper and cardboard substrates, include an effective stabilizing amount of at least one biogum heteropolysaccharide and at least one quaternary ammonium, sulfonium or phosphonium compound (cationic surfactant).Type: GrantFiled: April 24, 1992Date of Patent: August 10, 1993Assignee: Rhone-Poulenc ChimieInventors: Adrien Dromard, Claude Richard
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Patent number: 5221337Abstract: A universally applicable SiO.sub.2 -flatting agent is described, which consists of SiO.sub.2, 1 to 25% by weight polyol and optionally 1 to 25% by weight wax. The novel flatting agent is, even after lengthy storage, especially at pressure, still easily dispersible, does not lead to the formation of a hard sediment with non-thixotropic paints and lacquers, and has practically no negative effect on the thixotropic behaviour of paints and lacquers based on thixotropic polyamide-modified alkyd resins. The SiO.sub.2, polyol and wax can be brought together in a variety of ways, e.g. during the micronization of the SiO.sub.2 in a jet-mill or mechanical mill by adding polyol and wax at the same time, by spray-drying a suspension of SiO.sub.2 in an aqueous polyol solution or even before drying by adding polyol during washing or an earlier production step. It is also possible to spray-dry a suspension of SiO.sub.2, wax emulsion and polyol.Type: GrantFiled: November 1, 1991Date of Patent: June 22, 1993Assignee: W. R. Grace & Co.-Conn.Inventors: Georg Luers, Gerd W. Scheuren, Heiko Zeh
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Patent number: 5215581Abstract: A particulate inorganic solid, especially hydrated alumina or magnesium hydroxide, which has been treated with a hydroxybenzene derivative of a defined type, particularly a gallate. The treated solid may be incorporated into a polymer especially a thermoplastic polymer such as polypropylene. Alternatively, the solid, the hydroxybenzene derivative and the polymer can be blended together. The composition obtained can be processed even when containing 70% by weight of the inorganic solid.Type: GrantFiled: July 17, 1991Date of Patent: June 1, 1993Assignee: Imperial Chemical Industries PLCInventors: David Stewart, Robert S. Whitehouse
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Patent number: 5204402Abstract: A multipurpose additive system comprising(a) an alkali metal zeolite, an alkaline earth metal zeolite, zinc zeolite, or mixtures thereof;(b)(i) an aliphatic compound containing at least six carbon atoms substituted with one or more polar functional groups sufficient to provide a polar group frequency factor of at least about 0.01; or(ii) a polydimethylsiloxane compound containing from 4 to about 500 siloxane units, substituted with one or more polar functional groups sufficient to provide a polar group frequency factor of at least about 0.01; or(iii) mixtures thereof in any proportion; and(c) optionally, zinc oxide.Type: GrantFiled: December 11, 1990Date of Patent: April 20, 1993Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: George N. Foster, Anthony J. Gioffre
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Patent number: 5176752Abstract: Aqueous-based microsilica slurries having resistance to gelling and settlement of solids are provided. The slurries contain amino alcohols as stabilizing agents, the amino alcohols having the formula ##STR1## wherein R.sup.1 and R.sup.2 are each individually hydrogen or a linear or branched alkyl group containing 1 to 6 carbon atoms; R.sup.3 is a linear or branched alkylene group containing 1 to 8 carbon atoms; and R.sup.4 and R.sup.5 are each individually hydrogen, a linear or branched alkyl group containing 1 to 8 carbon atoms, or a linear or branched hydroxyalkyl group containing 1 to 8 carbon atoms.Also provided are hydraulic cement compositions comprising a hydraulic-cement binder, microsilica, and an amino alcohol of the invention.Type: GrantFiled: April 14, 1992Date of Patent: January 5, 1993Assignee: W. R. Grace & Co.-Conn.Inventor: Paul Scheiner
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Patent number: 5151218Abstract: Phosphoric acid esters and their salts corresponding to the formula (I): ##STR1## wherein R represents an aliphatic, cycloaliphatic and/or aromatic moiety having no Zerewitinoff hydrogen, containing at least one ether oxygen atom (--O--) and at least one carboxylic acid ester group (--COO--) and/or urethene group (--NAOO--), and having an average molecular weight M.sub.n of 200 to 10,000, wherein the hydrogen atoms may be partially replaced by halogen atoms, and wherein the ratio of the number of ether oxygen atoms to the number of carboxylic acid ester groups and/or urethane groups in the molecule (or in every group R) is in the range from 1:20 to 20:1, and n represents 1 or 2. A method for preparing such phosphoric acid esters and salts and the use of such phosphoric acid esters or salts as dispersants or dispersing aids is also disclosed.Type: GrantFiled: January 3, 1992Date of Patent: September 29, 1992Assignee: BYK-Chemie GmbHInventors: Karl-Heinz Haubennestel, Wolfgang Pritschins
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Patent number: 5126203Abstract: Residual silicone from direct process manufacture of chlorosilanes is stabilized for transportation and disposal by pelletizing finely divided particles of finely divided residual silicon powder contaminated with chlorine, hydrogen, and oxygen and highly reactive and exothermic upon exposure to moisture, and impregnating the pellets with an organic binder.Type: GrantFiled: September 3, 1991Date of Patent: June 30, 1992Assignee: General Electric CompanyInventors: Alan Ritzer, George P. Moloney, Jr., Jack C. Leunig
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Patent number: 5123964Abstract: Finely divided precipitated silica with high structure and a______________________________________ BET surface (DIN 66 132) of 150 to 350 m.sup.2 /g Stamping density (DIN 53 194) between 60 and 120 g/l DBP number between 3.0 and 4.0 ml/g Particle size distribution at least 70% from 1 to 6 .mu.m ______________________________________can be prepared by heating a mixture of water and sodium silicate under agitation to a temperature of 70.degree. to 80.degree. C., adding concentrated sulfuric acid into this mixture until half of the alkali present has been neutralized, shearing the reaction mixture and optionally raising the temperature at the same time to 86.+-.5.degree. C. Concentrated sulfuric acid is added after a period of 30 to 120 minutes at a rather high rate until the pH of the silica suspension produced is 3.0 to 3.Type: GrantFiled: May 16, 1991Date of Patent: June 23, 1992Assignee: Degussa AktiengesellschaftInventors: Dieter Kerner, Adolf Wagner, Felix Schmidt, Dietrich Bauer
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Patent number: 5074917Abstract: Novel Pigmentary colorants, well adapted for the production of electrostatic developer powders and dentifrices, are comprised of coprecipitated/crystallized mineral oxide particulates and at least one dye. The at least one dye is at least partly physically confined within a matrix of the mineral oxide.Type: GrantFiled: March 29, 1989Date of Patent: December 24, 1991Assignee: Rhone-Poulenc ChimieInventor: Jacques Persello
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Patent number: 4925493Abstract: A soil or dirt mixture that will not freeze into a stiff mass, and a method of making the same, are provided. The mixture is comprised of soil and wax, especially paraffin wax. The soil and wax are heated up, and are then mixed together while being continuously stirred until the mixture is cool.Type: GrantFiled: April 26, 1989Date of Patent: May 15, 1990Inventor: Michael A. Lamoreaux
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Patent number: 4892694Abstract: Residual silicone from direct process manufacture of chlorosilanes is stabilized for transportation and disposal.Type: GrantFiled: January 13, 1989Date of Patent: January 9, 1990Assignee: General Electric CompanyInventors: Alan Ritzer, George P. Moloney, Jr., Jack C. Leunig
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Patent number: 4880472Abstract: Compositions containing an organic pigment coated with metal oxides, wherein the pigment particles are provided with a tenacious, dense, highly crosslinked coating of silica and/or alumina which is fixed by polycondensation of a silicate and/or aluminate with the free hydroxyl groups of a layer that densely coats the surface of the pigment particles and which consists substantially of partially hydrolyzed compounds of elements of group 4A or 4B of the Periodic Table selected from the group consisting of chelates of formula ##STR1## wherein R is methyl, ethyl, methoxy or ethoxy, R.sup.1 is methyl or ethyl and X is halogen or C.sub.1 -C.sub.4 alkoxy, and M is Ti or Sn, and of esters of formulaQ(OR.sup.2).sub.4 (III),wherein Q is an element of group 4A or 4B of the Periodic Table and R.sup.2 is C.sub.1 -C.sub.4 alkyl.Type: GrantFiled: June 6, 1988Date of Patent: November 14, 1989Assignee: Ciba-Geigy CorporationInventors: Philippe Bugnon, Arnold Grubenmann, Bernhard Medinger, Jean Schaefle
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Patent number: 4857491Abstract: An organo-clay is prepared by treating a clay mineral of the smectite type with a mixture of di(lower alkyl) arylkyl (higher alkyl) ammonium compound and a di(lower alkyl) di(higher alkyl) ammonium compound and thereafter subjecting the treated clay mineral to high shear mixing for a time sufficient to dissipate in the mixture at least 100 KJ of energy per Kg of dry solids in the mixture. The organo-clay is useful in gelling compositions containing one or more liquid aliphatic alcohols.Type: GrantFiled: August 13, 1986Date of Patent: August 15, 1989Assignee: ECC International LimitedInventor: Howard Goodman