Mica Patents (Class 106/DIG3)
  • Patent number: 6117419
    Abstract: Described herein is a method for making a flake for use in a topical application. The flake is formed by contacting a liquid phase waxy material that may contain pigments, fragrance, plasticizer, hydrophilic modifier with a pseudoplastic hydrophilic gel, and/or an active ingredient. The waxy material contacts the surface of the gel and after the two materials have contacted, the waxy material is solidified and forms a sheet. This sheet is then broken into pieces to form the flakes of the present invention. The flakes can be used in formulating any topical product that can contain a lipid material.
    Type: Grant
    Filed: September 16, 1996
    Date of Patent: September 12, 2000
    Inventor: Joseph James Vernice
  • Patent number: 5693134
    Abstract: An interference pigment comprising a platelet-shaped substrate coated with titanium dioxide and additionally oxidic compounds of copper and manganese, whereby the pigment powder color is dark gray.
    Type: Grant
    Filed: December 29, 1994
    Date of Patent: December 2, 1997
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventor: Alfred Stephens
  • Patent number: 5618342
    Abstract: The invention relates to a non-dusting, homogeneous pigment preparation containingat least 70% by weight of one or more flaky pigments,1-30% by weight of water,0.1-20% by weight of a humectant, andless than 1.00% by weight of one or more preservatives.
    Type: Grant
    Filed: June 2, 1994
    Date of Patent: April 8, 1997
    Assignee: Merck Patent Gesellschaft MIT Beschrankter Haftung
    Inventors: Gerhard Herget, Otto Stahlecker, Manfred Kieser
  • Patent number: 5540769
    Abstract: Platelet-shaped colored pigments containing titanium dioxide, one or more suboxides of titanium and an oxide or oxides of one or more metals other than titanium or non-metals and a process for the preparation thereof is disclosed.
    Type: Grant
    Filed: September 23, 1994
    Date of Patent: July 30, 1996
    Assignee: Merck Patent Gesellschaft Mit Beschrankter Haftung
    Inventors: Klaus-Dieter Franz, Klaus Ambrosius, Stefan Wilhelm, Katsuhisa Nitta
  • Patent number: 5523059
    Abstract: The invention provides an intumescent sheet material comprising 25 to 60 dry weight percent of at least one unexpanded intumescent material, 25 to 60 dry weight percent of ceramic fibers, 0.5 to 5 dry weight percent of glass fibers having a diameter of less than about 2 microns, and 0.1 to 15 dry weight percent of organic binder, wherein said intumescent sheet material has a cold erosion rate of less than 0.05 grams/hour. The invention also provides catalytic converters and diesel particulate filters containing the sheet material.
    Type: Grant
    Filed: June 30, 1995
    Date of Patent: June 4, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Roger L. Langer
  • Patent number: 5407746
    Abstract: The application relates to deagglomerated and readily dispersible platelet-like substrates with a high degree of softness, which are characterized by a content of 0.5-20% by weight of spherical particles having a small diameter in comparison with the platelet-like substrate, and to a process for their preparation and their use.
    Type: Grant
    Filed: September 28, 1993
    Date of Patent: April 18, 1995
    Assignee: Merck Patent Gesellschaft Mit Beshrankter Haftung
    Inventors: Constanze Prengel, Johann Dietz, Angelika Thurn-Muller
  • Patent number: 5405441
    Abstract: The present invention relates to a novel composition which is useful for forming construction blocks and encapsulating hazardous materials, a process for producing blocks and encapsulating the material, and blocks made of the material. This composition is a mixture of pozzoulanic fly ash and bottom ash. The weight ratio of fly ash:bottom ash is preferably in the range 80:20% by weight to 20:80% by weight. The process comprises the steps of (a) blending a dry mixture comprising the ash mixture with water; (b) transferring the blended mixture into a compression zone and (c) compressing the blended mixture in the compression zone to form a brick of the desired size.
    Type: Grant
    Filed: July 11, 1994
    Date of Patent: April 11, 1995
    Assignee: Tide Company
    Inventor: Mitchell S. Riddle
  • Patent number: 5376604
    Abstract: There are disclosed an organophilic clay which comprises a hydroxypolyoxyethylenealkyl ammonium ion represented by the following formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 may be the same or different, and each represent a (CH.sub.2 CH.sub.2 O).sub.n H group (where n is 2 or more, preferably 2 to 20), a hydrogen atom or an alkyl group having 1 to 30 carbon atoms, provided that one to three of R.sub.1 to R.sub.4 is/are a (CH.sub.2 CH.sub.2 O).sub.n H group(s) and at least three of R.sub.1 to R.sub.4 are (CH.sub.2 CH.sub.2 O).sub.n H group(s) and alkyl group(s),being introduced in interlayers of an expandable layer silicate, a method for preparing the same and a gellant for a high polar organic solvent.
    Type: Grant
    Filed: July 7, 1992
    Date of Patent: December 27, 1994
    Assignees: CO-OP Chemical Co., Ltd., Director General of The Agency of Industrial Science and Technology Shunso Ishihara
    Inventors: Takashi Iwasaki, Hiromichi Hayashi, Kazuo Torii, Takahiro Sekimoto, Toshikazu Fujisaki, Motoyuki Ikegami, Yutaro Ishida
  • Patent number: 5340558
    Abstract: A vermiculite composition capable of exhibiting a high degree of volume increase upon subjection to thermal exfoliation composed of vermiculite mineralogical species having specific gravity of from 2.5 g/cm.sup.3 to 2.9 g/cm.sup.3. Further, intumescent sheets formed with said vermiculite composition exhibit low initial expansion temperature and very high maximum expansion properties.
    Type: Grant
    Filed: June 14, 1993
    Date of Patent: August 23, 1994
    Assignee: W.R. Grace & Co.-Conn.
    Inventors: Semyon D. Friedman, Robert W. McKinney, Chia-Chih Ou, Robert M. Spotnitz, Shaohai Wu
  • Patent number: 5338349
    Abstract: A fire resistant and high temperature insulating composition is provided. The composition generally comprises a carbonate material in an amount from about 20% to about 80% by weight, an aluminosilicate in amount from about 0.5% to about 15% by weight, talc in amount from about 0.5% to about 10% by weight, cellulose in amount from about 1% to about 30% by weight, a binder in an amount from about 1% to about 45% by weight, and a gelling agent in an amount from about 1% to about 45% by weight. The binder is preferably a mixture of an organic adhesive such as a polymeric resin, and a non-organic adhesive such as cement, but other adhesives can be used alone or in combination therewith. The gelling agent is preferably a polymeric substance that swells in the presence of a liquid such as superabsorbent polymers. The components are combined and water may be added in an amount from about 1 to about 50% by weight to obtain a composition of the desired consistency.
    Type: Grant
    Filed: May 24, 1993
    Date of Patent: August 16, 1994
    Assignee: FireComp, Inc.
    Inventor: Randolph C. Farrar
  • Patent number: 5336348
    Abstract: The present invention provides a method for forming a coherent vermiculite film which can be performed on a continuous basis. An exemplary method comprises the steps of providing a non-flocculated dispersion of delaminated vermiculite platelets, providing a flexible release carrier having a surface operative for retaining thereupon a wet film of said dispersion and further operative for releasing the vermiculite film when dried, applying a wet vermiculite film to the moving carrier, and drying the vermiculite film, whereby the dried film is releasable from the carrier. The flexible release carrier preferably comprises paper having a release agent coating thereon. The invention also provides a flexible carrier-supported releasable vermiculite film, a film made from an vermiculite-aziridine composition, a composition of vermiculite and an aziridine, and a composition of vermiculite and amine resulting from an aziridine.
    Type: Grant
    Filed: December 16, 1992
    Date of Patent: August 9, 1994
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Richard E. Mindler
  • Patent number: 5326500
    Abstract: A vermiculite composition composed of particulate vermiculite mineral species having a density of 2.3 g/cm.sup.3 to 2.7 g/cm.sup.3 which has intercalated cations of lithium or organo ammonium and to dispersions obtained therefrom.
    Type: Grant
    Filed: June 14, 1993
    Date of Patent: July 5, 1994
    Assignee: W.R. Grace & Co.-Conn.
    Inventors: Semyon D. Friedman, Robert W. McKinney, Chia-Chih Ou, Robert M. Spotnitz, Shaohai Wu
  • Patent number: 5308394
    Abstract: Disclosed are a pigment including a light-transparent ceramic scaly substrate, a tin compound layer coated on a surface of the substrate in an amount of 0.6 to 0.75% by weight with respect to the substrate, the amount being converted into metallic tin, a rutile type titanium dioxide layer formed on a surface of the substrate coated with the tin compound, a metal compound layer coated on a surface of the titanium dioxide layer in an amount of 0.15 to 0.6% by weight with respect to the substrate, metal of the metal compound being at least one selected from the group consisting of Bi, Sb, As, Cd, Zn, Mn, Pb and Cr, and the amount being converted into metal, and metallic glossy dots formed on the surfaces in a scattering manner, the metallic glossy dots occupying 0.05 to 95% of a total surface area of the surfaces, and a process for producing the same.
    Type: Grant
    Filed: August 20, 1992
    Date of Patent: May 3, 1994
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Taketoshi Minohara, Hiroshi Ito, Junichi Handa, Yuji Tanaka
  • Patent number: 5273576
    Abstract: Iron oxide-coated micaceous pigments having a chroma enhancing amount of a coating of a colorless metal oxide which has a refractive index of at least about 2.0 exhibit intensely colored effects.
    Type: Grant
    Filed: October 19, 1992
    Date of Patent: December 28, 1993
    Assignee: Mearl Corporation
    Inventors: William J. Sullivan, Thomas J. Birch
  • Patent number: 5234496
    Abstract: Finely divided mica based pigments coated with about 5-20% by weight, based on the weight of the pigment, of an alkylene glycol alkyl ether that can be added directly to a coating composition and blended with the coating composition and a process for coating the pigment with the alkylene glycol alkyl ether and blending the coated pigment into a coating composition.
    Type: Grant
    Filed: July 30, 1991
    Date of Patent: August 10, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: James R. Keiser
  • Patent number: 5217528
    Abstract: A non-asbestos friction material comprising mica powder adhered with aluminum phosphate and then subjected to the heating treatment, friction modifier and thermosetting resin binder is disclosed. The material is used for the brake lining and clutch facing for cars and industrial machinery.
    Type: Grant
    Filed: October 18, 1991
    Date of Patent: June 8, 1993
    Assignees: Akebono Brake Industry Co., Ltd., Akebono Research and Development Centre Ltd.
    Inventor: Katsuji Seki
  • Patent number: 5204078
    Abstract: The present invention is a method for producing swellable or nonswellable fluorine mica at a relatively lower temperature by heating a powdery mixture comprising 10 to 35% by weight of an alkali silicofluoride as the main component optionally together with an alkali fluoride and the balance of talc. This fluorine mica is used for pigments, etc.
    Type: Grant
    Filed: September 25, 1991
    Date of Patent: April 20, 1993
    Assignees: Co-Op Chemical Co., Ltd., The Agency of Industrial Science and Technology
    Inventors: Hiroshi Tateyama, Kinue Tsunematsu, Kunio Kimura, Hideharu Hirosue, Kazuhiko Jinnai, Takashi Furusawa
  • Patent number: 5156889
    Abstract: Metal oxide coated mica pigments are provided with enhanced light and moisture stability by providing on the particle surfaces of coating of hydrous aluminum oxide.
    Type: Grant
    Filed: December 11, 1991
    Date of Patent: October 20, 1992
    Assignee: The Mearl Corporation
    Inventor: Carmine V. DeLuca, Jr.
  • Patent number: 5151253
    Abstract: A monolith can be mounted in a catalytic converter by a material containing intumescent vermiculite flakes that have a uniform content of chemically bound water from about 1.0 to 3.2% by weight and a uniform bulk density from about 0.2 to 0.9 g/cm.sup.3. Such a mounting affords good support to the monolith at warm-up temperatures, exerts adequate holding forces at operating temperatures without danger of cracking the monolith, and does not incur gradual reduction in holding forces at operating temperatures.
    Type: Grant
    Filed: April 18, 1991
    Date of Patent: September 29, 1992
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Richard P. Merry, Roger I. Langer
  • Patent number: 5116664
    Abstract: A titanium-mica composite material comprising (i) mica, (ii) a first coating composed of titanium dioxide, coated on the surface of the mica, and (iii) a second coating compound of powder particles of at least one metal selected from the group consisting of cobalt, nickel, copper, zinc, tin, gold, and silver coated on the first coating.
    Type: Grant
    Filed: March 14, 1991
    Date of Patent: May 26, 1992
    Assignee: Shiseido Company Ltd.
    Inventors: Asa Kimura, Fukuji Suzuki
  • Patent number: 5102464
    Abstract: Stable vermiculite dispersions which are substantially free of settling and a method of preparing same are provided. The dispersions are obtained by treating the vermiculite platelets of which the dispersion is comprised with an anionic chelating agent. The anionic chelating agent enhances the rate and degree of swelling of the vermiculite in an aqueous medium. The swollen vermiculite is delaminated by shearing to provide the inventive dispersions.
    Type: Grant
    Filed: October 31, 1990
    Date of Patent: April 7, 1992
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Chia-Chih Ou
  • Patent number: 5061317
    Abstract: The invention relates to a new nacreous pigment which contains a dye or a color pigment and is based on metal-oxide-coated mica particles or other layer silicate particles, and to a method for preparing it. The pigment particles consist of metal-oxide-coated, porous silica skeletons of mica particles or of other silicate particles, containing few or no cations and having at least one dye or color pigment attached to them. In the method, a) a preliminary-stage product is prepared from mica particles or other layer silicate particles and a metal-oxide coating, the metal-oxide coating being poorly soluble or insoluble in acids, b) the thus obtained metal-oxide-coated mica particles or other layer particles are leached with a mineral acid, possibly together with an oxidant, and c) the dyeing of the thus produced metal-oxide-coated, porous silica skeletons of mica particles or of other layer silicate particles, containing few or no cations, is carried out using at least one dye or one color pigment.
    Type: Grant
    Filed: January 18, 1989
    Date of Patent: October 29, 1991
    Assignee: Kemira Oy
    Inventors: Taina M. Korpi, Seppo J. O. Hyttinen, Pekka J. Vapaaoksa
  • Patent number: 5049237
    Abstract: Disclosed are flocced mineral materials which may be utilized to prepare high temperature resistant, water resistant articles. These materials are prepared by utilizing, as a starting material, a gellable layered swelled silicate that has an average charge per structural unit that ranges from about -0.4 to -1 and which contains interstitial cations which promote swelling with a source of at least one species of multiamine derived cations.
    Type: Grant
    Filed: October 30, 1989
    Date of Patent: September 17, 1991
    Assignee: Armstrong World Industries, Inc.
    Inventors: Walter J. Bohrn, Richard A. Brubaker, Shelly N. Garman, Lewis K. Hosfeld, Kenneth K. Ko, Thomas M. Tymon
  • Patent number: 4956121
    Abstract: Chemically prepared mica and vermiculite materials are described along with the method for preparing them. The mica and vermiculite has dimethylacetamide-lithium chelation complexes at interlayer cationic sites. These materials can be made into suspensions and flocculated.
    Type: Grant
    Filed: January 17, 1989
    Date of Patent: September 11, 1990
    Assignee: Armstrong World Industries, Inc.
    Inventors: Thomas M. Tymon, Albin F. Turbak
  • Patent number: 4877551
    Abstract: It has been found that water stable articles, such as films and sheets, can be prepared from chemically delaminated vermiculite platelets if radical or ionically polymerizable organo-substituted onium salts are ionically bonded to the platelets and the resulting system cured.
    Type: Grant
    Filed: August 22, 1988
    Date of Patent: October 31, 1989
    Assignee: Hercules Incorporated
    Inventor: Alexander Lukacs, III
  • Patent number: 4851021
    Abstract: Sheets and laminated composites are described which are prepared with epoxy and flocculated vermiculite and mica dispersions. Processes and procedures are also described to obtain film and sheet materials from the flocculated silicate and epoxy dispersions.
    Type: Grant
    Filed: January 14, 1988
    Date of Patent: July 25, 1989
    Assignee: Armstrong World Industries, Inc.
    Inventors: Walter J. Bohrn, Shelly N. Garman, Thomas M. Tymon
  • Patent number: 4828459
    Abstract: An annular electromagnetic induction pump is disclosed which operates without an external cooling source in pumping molten metals such as magnesium, aluminum, lead, zinc, antimony and their numerous alloys. Also disclosed is an electrical insulation material which is serviceable without degradation at temperatures up to 1500.degree. F. Also disclosed is a six coil version of said annular electromagnetic induction pump which provides reduced size advantages.
    Type: Grant
    Filed: December 16, 1987
    Date of Patent: May 9, 1989
    Assignee: The Dow Chemical Company
    Inventor: Hugh C. Behrens
  • Patent number: 4818435
    Abstract: It has been found that water stable articles, such as films and sheets, can be prepared from chemically delaminated vermiculite platelets if radical or ionically polymerizable organo-substituted onium salts are ionically bonded to the platelets and the resulting system cured.
    Type: Grant
    Filed: March 12, 1987
    Date of Patent: April 4, 1989
    Assignee: Hercules Incorporated
    Inventor: Alexander Lukacs, III
  • Patent number: 4801403
    Abstract: A process for the production of an aqueous dispersion of vermiculite ore particles comprising delaminating vermiculite ore by subjecting an aqueous slurry of the ore to a shearing action until a dispersion containing vermiculite lamellae having dimensions less than 200 microns is produced.
    Type: Grant
    Filed: July 17, 1987
    Date of Patent: January 31, 1989
    Assignee: Hercules Incorporated
    Inventors: Cheng-Fa Lu, Lawrence L. Nelson
  • Patent number: 4800041
    Abstract: An aqueous suspension of sheet silicate and the method of making the same are disclosed. The suspension is produced by treating crystals of 2:1 layer sheet silicates with a solution containing a water soluble salt of a cation of a secondary, tertiary or quaternary alkyl ammonium compound and thereafter dispersing the vermiculite crystals.
    Type: Grant
    Filed: October 3, 1986
    Date of Patent: January 24, 1989
    Assignee: Armstrong World Industries, Inc.
    Inventors: Thomas M. Tymon, Shelly S. Niznik
  • Patent number: 4786620
    Abstract: There is disclosed a natural phyllosilicate and, in solid solution therewith, at least one additional silicate or spinel phase such as beta-quartz, beta-spodumene, biotite, donathite, magnetite and Ca.sub.2 MgFe.sub.2 O.sub.6. There is also disclosed a method of producing such solid solution by introducing a phyllosilicate into a salt bath to effect an ion exchange between the salt of the bath and the phyllosilicate and subjecting the ion-exchanged phyllosilicate to a thermal treatment to develop a new phase which forms a solid solution.
    Type: Grant
    Filed: May 12, 1986
    Date of Patent: November 22, 1988
    Assignee: Corning Glass Works
    Inventor: Hermann L. Rittler
  • Patent number: 4775586
    Abstract: Two:One layered silicate flocs with homogeneously intermixed polymers and a method for the compositions's preparation is described. Preferred embodiment include co-flocculated homogeneously intermixed polymer and 2:1 layered silicate. The materials are prepared by contacting a co-dispersion of polymer and silicate with a cationic flocculant.
    Type: Grant
    Filed: February 17, 1987
    Date of Patent: October 4, 1988
    Assignee: Armstrong World Industries, Inc.
    Inventors: Walter J. Bohrn, Richard A. Brubaker, Shelly N. Garman, Lewis K. Hosfeld, Thomas M. Tymon
  • Patent number: 4767725
    Abstract: A crystallized glass-ceramic molded product having a glass matrix and crystallized calcium fluoride and fluormica dispersed therein. The molded product is prepared by mixing and melting together the necessary constituents for forming the glass, calcium fluoride and fluormica and rapidly cooling the melt to produce a frit. Particles of the frit or of two or more frits are then subjected to sintering and crystallizing heat treatments.
    Type: Grant
    Filed: December 31, 1985
    Date of Patent: August 30, 1988
    Assignee: Masao Yoshizawa
    Inventors: Toyonobu Mizutani, Masao Yoshizawa, Toichiro Izawa
  • Patent number: 4762643
    Abstract: Disclosed are compositions of flocced mineral materials combined with fibers and/or binders. These compositions may be utilized to prepare high temperature resistant, water resistant articles. These materials are prepared by utilizing, as a starting material, a gellable layered swelled silicate that has an average charge per structural unit that ranges from about -0.5 to -1 and which contains interstitial cations which promote swelling with a source of at least one species of an exchange cation that is derived from guanidine or compounds closely related thereto.
    Type: Grant
    Filed: June 5, 1987
    Date of Patent: August 9, 1988
    Assignee: Armstrong World Industries, Inc.
    Inventors: Walter J. Bohrn, Richard A. Brubaker, Shelly N. Garman, Lewis K. Hosfeld, Thomas M. Tymon, Kenneth K. Ko
  • Patent number: 4746570
    Abstract: A heat-resistant, highly expansible sheet material for supporting a catalyst carrier containing unexpanded vermiculite, in which the cations contained between the layers of the vermiculite are at least partly exchanged by ammonium cations, is provided. A process for the preparation of the sheet material, which involves blending an unexpanded vermiculite which has been preliminarily immersed in an aqueous solution containing alkali metal ions, inorganic fiber, an organic binder, and an inorganic binder, whereto a slurry solution of beaten natural organic fiber is added, and forming a sheet material from the mixture, is described.
    Type: Grant
    Filed: September 28, 1987
    Date of Patent: May 24, 1988
    Assignees: Toyota Jidosha Kabushiki Kaisha, Ibiden Kabushiki Kaisha
    Inventors: Tooru Suzaki, Yoshihiro Kanome, Masaomi Hayakawa, Kunihiko Miyashita
  • Patent number: 4707298
    Abstract: Disclosed are flocced mineral materials which may be utilized to prepare high temperature resistant, water resistant articles. These materials are prepared by utilizing, as a starting material, a gellable layered swelled silicate that has an average charge per structural unit that ranges from about -0.5 to -1 and which contains interstitial cations which promote swelling with a source of at least one species of an exchange cation that is derived from guanidine or compounds closely related thereto.
    Type: Grant
    Filed: February 13, 1986
    Date of Patent: November 17, 1987
    Assignee: Armstrong World Industries, Inc.
    Inventor: Thomas M. Tymon
  • Patent number: 4693924
    Abstract: A decorative tile having a front face with a design thereon varies in density so that the front face of the tile presents a solid appearance, but the overall weight of the tile is less than for a comparable conventional plaster tile. The tile of the invention can be made from a mixture including a binder, fiber strands, and a bulk enhancing agent. The decorative tile of this invention is particularly useful for ceiling decoration.
    Type: Grant
    Filed: August 14, 1986
    Date of Patent: September 15, 1987
    Inventors: Nina M. Kuper, Janis I. Kalnajs
  • Patent number: 4687694
    Abstract: A gypsum plaster and chopped glass fiber tile having increased insulation values, reduced weight and reduced density due to the presence of vermiculite and perlite.
    Type: Grant
    Filed: February 13, 1985
    Date of Patent: August 18, 1987
    Inventors: Nina M. Kuper, Janis I. Kalnajs
  • Patent number: 4687521
    Abstract: Randomly interstratified clay in synthesized by:(i) saturating (replacing all the exchangeable cations of) a first clay with alkali metal ions (preferably Na.sup.+ or Li.sup.+), removing any excess alkali metal ions, and forming the saturated clay into a suspension containing no suspended particles exceeding 10.sup.-7 m equivalent spherical diameter,(ii) saturating a second clay with alkali metal ions (preferably Na.sup.+ or Li.sup.+), removing any excess alkali metal ions, and forming the saturated clay into a suspension containing no suspended particles exceeding 10.sup.-7 m equivalent spherical diameter,(iii) mixing the suspensions from (i) and (ii) to form a mixed suspension, and(iv) sedimenting and optionally drying the mixed suspension, the sediment being the synthetic randomly interstratified clay.A wider range of synthetic clay compositions is thereby made available for use as catalysts, sorbents etc.
    Type: Grant
    Filed: October 30, 1984
    Date of Patent: August 18, 1987
    Assignee: National Research Development Corporation
    Inventor: Paul H. Nadeau
  • Patent number: 4569920
    Abstract: Novel aqueous inorganic particle slurries, wherein some of the particles have had their charge potential altered to a sufficient extent to prevent segregation or settling of the particles, are described, along with a method for their preparation. The method of forming slurries of negatively charged particles comprises treating some of the particles with a cationic agent to reduce their charge and mixing these treated particles with the remainder of the particles to form a thick, cream-like flowable composition of a thixotropic nature. When slurries of positively charged particles are to be formed, an anionic agent is used instead of a cationic agent.
    Type: Grant
    Filed: September 6, 1983
    Date of Patent: February 11, 1986
    Assignee: Blasch Precision Ceramics, Inc.
    Inventor: Robert Smith-Johannsen
  • Patent number: 4565581
    Abstract: Nacreous pigments having improved light fastness are based on mica platelets coated with titanium dioxide and, optionally other additional metal oxides. These pigments carry an additional thin manganese oxide layer. The pigments are prepared in a process wherein mica is coated in aqueous suspension with one or more titanium dioxide hydrate layers and, optionally, with further metal oxide layers, mixed with the titanium dioxide hydrate or separately therefrom, and then is washed, dried and calcined. The process further comprises precipitating an additional layer of manganese hydroxide onto the base pigment, either directly after coating with the titanium dioxide hydrate and/or metal oxide layers or after the calcination thereof. The flakes are the washed, dried and calcined.The new pigment can be used for pigmenting plastics, lacquers, paints and cosmetics, inter alia.
    Type: Grant
    Filed: December 27, 1982
    Date of Patent: January 21, 1986
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventor: Horst Bernhard
  • Patent number: 4562164
    Abstract: A ceramic-like high temperature insulation for electrical coils is provided by mixing a silicone resin, synthetic fluoro-mica and a devitrified mica glass, impregnating an electrical coil with such material, curing the material and then treating the material to an elevated temperature about 300.degree. C. The elevated temperature treatment may be effected either prior to or during use of the coil.
    Type: Grant
    Filed: January 23, 1985
    Date of Patent: December 31, 1985
    Assignee: Nikkiso Co. Ltd.
    Inventors: Haruo Miyazaki, Yasuaki Yamasaki, Tsutomu Oshiyama
  • Patent number: 4551491
    Abstract: A coating composition is described comprising a thermoplastic or thermosetting resin material containing a pigment composition. The pigment composition contains about 5 to about 90% iron oxide encapsulated mica particles. When used in a multi-coat coating process as a basecoat overcoated with a transparent overcoat, an article is produced which not only produces improved pearlescent color effects, but is stable to the elements as well.
    Type: Grant
    Filed: December 7, 1984
    Date of Patent: November 5, 1985
    Assignee: Inmont Corporation
    Inventor: Sol Panush
  • Patent number: 4539046
    Abstract: A process for producing solid vermiculite products which are stable in water which comprises incorporating a source of ammonia or ammonium ions or a basic substance, preferably urea, in an aqueous suspension of vermiculite lamellae, shaping the suspension and removing water from the suspension by heating the shaped suspension at a temperature above 100.degree. C., preferably above 150.degree. C., such that ammonia or a basic substance is liberated within the suspension. The invention includes an aqueous suspension of vermiculite lamellae containing a source of ammonia or ammonium ions or a basic substance and a dry-powder mixture of vermiculite lamellae and a source of ammonia or ammonium ions or a basic substance.
    Type: Grant
    Filed: December 15, 1983
    Date of Patent: September 3, 1985
    Assignee: Imperial Chemical Industries PLC
    Inventors: Kevin T. McAloon, Iona E. Heeson, Gordon E. Cleaver
  • Patent number: 4537636
    Abstract: A process for preparing nacreous pigments having improved gloss properties and based on mica platelets coated with metal oxides comprises suspending mica platelets in a solution containing titanium sulfate, the mica platelets having a coating comprising a homogeneous mixture of titanium dioxide, aluminum oxide and silicon dioxide, and further coating the suspended platelets by slow heating of the suspension.
    Type: Grant
    Filed: March 30, 1983
    Date of Patent: August 27, 1985
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Horst Bernhard, Reiner Esselborn
  • Patent number: 4529653
    Abstract: Non-asbestos flexible sheet material suitable for use in gaskets for the exhaust manifold of an internal combustion engine is made by dewatering on a water-permeable conveyor a layer of aqueous slurry and compressing and drying the dewatered layer, the aqueous slurry employed being one that contains the following ingredients in the following proportions by dry weight:ball clay: 25-44%non-fibrous layer silicate: 25-40%graphite: 10-30%cellulose fibres: 3-15%synthetic rubber: 1-10%starch: 1-5%.
    Type: Grant
    Filed: November 7, 1983
    Date of Patent: July 16, 1985
    Assignee: T&N Materials Research Limited
    Inventors: Brian Hargreaves, Robert A. Lancaster, Noel C. McKenzie, John D. Crabtree
  • Patent number: 4505977
    Abstract: Thermal insulation with at least one evacuated space, within which several layers of a non-metallic material are arranged. Between two respective successive layers, an intermediate layer serving as a spacer is arranged. The layers forming the insulating material consist preferably of mica paper. The intermediate layers are formed by layers of fiberglass fabric or mica powder. Glass or ceramic fiber paper may also be used for forming the intermediate layers.
    Type: Grant
    Filed: March 24, 1983
    Date of Patent: March 19, 1985
    Assignee: Brown, Boveri & Cie AG
    Inventors: Dieter Hasenauer, Harald Reiss
  • Patent number: 4499143
    Abstract: A transparent topcoat coating composition is described comprising a thermoplastic or thermosetting resin material containing low pigment to binder ratio of iron oxide encapsulated mica particles. When used in a multicoat coating process as a transparent topcoat, an article is produced which not only produces improved "metallic" color effects, but is stable to the elements as well.
    Type: Grant
    Filed: August 26, 1983
    Date of Patent: February 12, 1985
    Assignee: Inmont Corporation
    Inventor: Sol Panush
  • Patent number: 4486546
    Abstract: A process for preparing a heat resistant soft composite which comprises hot-pressing a mixture comprising talc powder and mica powder as major components and a bonding material composed of normal boric acid, boric acid anhydride and zinc oxide, at a temperature of from 160.degree. to 200.degree. C. under pressure of from 50 to 100 kg/cm.sup.2 to form a composite, and subjecting the composite to heat treatment at a temperature of from 450.degree. to 500.degree. C.
    Type: Grant
    Filed: September 19, 1983
    Date of Patent: December 4, 1984
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Tadaki Murakami, Yasuhiko Ikeda, Isao Ishii
  • Patent number: 4455382
    Abstract: This invention is directed to the preparation of neutralized polyelectrolyte complexes exhibiting hydrophobic behavior containing crystals of an organic polycation exchanged lithium and/or sodium water-swelling mica. The process for making such products comprises:(1) forming a glass-ceramic body containing crystals selected from the group of fluorhectorite, hydroxyl hectorite, boron fluorphlogopite, hydroxyl boron phlogopite, and solid solutions among those and between those and other structurally-compatible species selected from the group of talc, fluortalc, polylithionite, fluorpolylithionite, phlogopite, and fluorphlogopite;(2) contacting that body with a polar liquid to cause swelling and disintegration of the body accompanied with the formation of a gel; and(3) contacting said gel with a source of organic polycations to cause a reaction between the Li.sup.+ and/or Na.sup.
    Type: Grant
    Filed: January 27, 1983
    Date of Patent: June 19, 1984
    Assignee: Corning Glass Works
    Inventor: Shy-Hsien Wu