Patents Represented by Attorney James E. Bittell
  • Patent number: 6635605
    Abstract: An improved dielectric lubricant is prepared from a (A) a phenyl-methyl siloxane having an average general formula Me3(SiO)—(Me2SiO)x—(MePhSiO)y13 (SiO)Me3 wherein each Me represents a methyl group, each Ph represents a phenyl group, x has a value from zero to about 0.25 and x+y=1; said phenyl-methyl siloxane having a viscosity at 25° C. from about 500 to about 10,000 centipoise in combination with (B) a polytetrafluoroethylene powdered solid. The dielectric lubricant of the invention has particular utility when applied to the interface between a silicone rubber spark plug boot and spark plug.
    Type: Grant
    Filed: June 12, 1998
    Date of Patent: October 21, 2003
    Assignee: Dow Corning Corporation
    Inventors: David Jerome Como, Barry Mark Ketola
  • Patent number: 5969023
    Abstract: A curable silicone composition cures to form a silicone cured product with improved fire-retarding properties. The composition comprises a hydrosilylation-reaction curable silicone composition Fire-retarding properties are imparted to the composition using a silica powder with a specific surface area of not less than 50 sq. m/g and a diamine compound. The cured product is preferably a silicone gel.
    Type: Grant
    Filed: March 5, 1998
    Date of Patent: October 19, 1999
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Hiroji Enami, Yuji Hamada, Takeaki Saiki
  • Patent number: 5942637
    Abstract: Compounds containing a tetradecachlorocyclohexasilane dianion are prepared by contacting trichlorosilane with a reagent composition comprising a tertiary polyamine. The compound ?pedeta.SiH.sub.2 Cl.sup.+1 !.sub.2 ?Si.sub.6 Cl.sub.14.sup.-2 ! wherein pedeta is N,N,N',N",N"-pentaethyldiethylenetriamine is prepared by contacting trichlorosilane with pedeta. The compound ?Ph.sub.4 P.sup.+1 !.sub.2 ?Si.sub.6 Cl.sub.14.sup.-2 ! is prepared by contacting trichlorosilane with a mixture of N,N,N',N'-tetraethylethylenediamine and triphenylphosphonium chloride. The tetradecachlorocyclohexasilane dianion can be chemically reduced to cyclohexasilane, a compound useful in the deposition of amorphous silicon films. The tetradecachlorcyclohexasilane dianion can also be contacted with a Grignard reagent to form a dodecaorganocyclohexasilane.
    Type: Grant
    Filed: March 30, 1998
    Date of Patent: August 24, 1999
    Assignee: North Dakota State University Research Foundation
    Inventors: Philip Raymond Boudjouk, Beon-Kyu Kim, Michael Perry Remington, Bhanu Chauhan
  • Patent number: 5880306
    Abstract: Silyl cation of the formula Si.sup.+ R.sub.2 R' wherein R denotes a hydrogen, a hydrocarbon or fluorine and R' denotes a norbornyl or cyclopentenyl containing substituent is free of co-ordination with a solvent and is stable at a temperature of upto at least 40.degree.C. Also disclosed is a compound consisting of the cation and a borate or carborane anion, a composition comprising the cation and a solvent and a process for making the cation.
    Type: Grant
    Filed: August 26, 1997
    Date of Patent: March 9, 1999
    Assignee: Dow Corning, Ltd.
    Inventor: Norbert Auner
  • Patent number: 5840816
    Abstract: The invention provides a method for manufacturing a polysiloxane resin with charge transporting property by uniformly dissolving a charge transporting material to a practical concentration in a polysiloxane resin. The charge transporting material that is dissolved in the polysiloxane resin is an aromatically substituted tertiary amine which has been modified by substitution of one or more of the aromatic groups with a hydrocarbon group containing a silyl group with hydrolyzable substituents.
    Type: Grant
    Filed: November 4, 1996
    Date of Patent: November 24, 1998
    Assignees: Dow Corning Toray Silicone Co., Ltd., Dow Corning Asia, Ltd.
    Inventors: Hideki Kobayashi, Nobuo Kushibiki, Tohru Masatomi, Kikuko Takeuchi
  • Patent number: 5739948
    Abstract: A refractive index modulation element made of a refractive index modulation material. The refractive index can be thermally modulated. The refractive index modulation material can be a silicone resin represented by the following formula R.sub.n SiO.sub.(4--n)/2,where the average value of n is 0.5 to 3 and where K is an aliphatic or aromatic group with 1 to 18 carbon atoms or other functional group. The silicone resin has a spectral transmission factor that on average is higher than 80%, within the wavelength range of 350 nm to 1,600 nm, and a refractive index temperature dependence of -0.001/.degree.C. to -0.00005/.degree.C.
    Type: Grant
    Filed: October 8, 1996
    Date of Patent: April 14, 1998
    Assignee: Dow Corning Asia, Ltd.
    Inventors: Nobuo Kushibiki, Fumito Nishida, Takuya Ogawa, Toshio Suzuki
  • Patent number: 5707568
    Abstract: A process for the preparation of substantially polycrystalline silicon carbide fibers is provided. The fibers may be fabricated to have a small diameter and are thermally stable at high temperatures. The process is carried out by initially forming fibers from a preceramic polymeric precursor comprising methylpolysilane resins. The fibers are then infusibilized to render them nonmelting followed by a pyrolysis step in which the fibers are heated to a temperature in excess of 1600.degree. C. in a nonoxidizing atmosphere to form substantially polycrystalline silicon carbide fibers. The substantially polycrystalline silicon carbide fibers which are formed by the process of the present invention have at least 75% crystallinity and have a density of at least about 2.9 gm/cm.sup.3. The polymeric precursor or the fibers contain, or have incorporated therein, at least about 0.2% by weight boron.
    Type: Grant
    Filed: December 18, 1989
    Date of Patent: January 13, 1998
    Assignee: Dow Corning Corporation
    Inventors: David Charles Deleeuw, Jonathan Lipowitz, Paul Pu-yuan Lu, James Alan Rabe
  • Patent number: 5708099
    Abstract: The invention is an optically transparent organopolysiloxane resin with a large amount of a uniformly dissolved and dispersed optically-functional organic material. The compatibility of the optically functional material is achieved by modifying it by addition of alkoxysilylalkyl groups to aromatic groups of optically-functional organic compounds such phthalocyanines, porphyrins, tetraphenylbutadienes, axobenzenes, bis(4-dimethylaminodithiobenzyl)nickel and anthracenes. The compositions contain 20 to 200 parts by weight of the modified optically-functional organic compounds per 100 parts by weight of the organopolysiloxane resin. The composition may be formed into a specified shape, solvents evaporated, and cured by heat.
    Type: Grant
    Filed: November 4, 1996
    Date of Patent: January 13, 1998
    Assignee: Dow Corning Asia, Ltd.
    Inventors: Nobuo Kushibiki, Kikuko Takeuchi
  • Patent number: 5563228
    Abstract: The invention is a method for the preparation of organic solvent-soluble polyheterosiloxanes containing MO.sub.2 (M=Ti or Zr) and SiO.sub.2 units. A compound MA.sub.4 (M=Ti or Zr, A=hydrolyzable group) and a compound Si(OR).sub.4 (R=hydrocarbon group or alkali metal atom) are hydrolyzed and condensed in the presence of a carboxylic acid, a phenol, or a diketone. This is followed by the addition of an organosilane R.sup.1.sub.3 SiX (R.sup.1 =hydrogen or hydrocarbon group, X=hydrolyzable group) and hydrolysis and condensation.
    Type: Grant
    Filed: February 3, 1995
    Date of Patent: October 8, 1996
    Assignee: Dow Corning Asia, Ltd.
    Inventors: Takuya Ogawa, Toshio Suzuki
  • Patent number: 5545704
    Abstract: A method is described of producing alkoxysilalkylene enblocked polydiorganosiloxane in two steps. First, silanol terminated polydiorganosiloxane is capped with an SiH containing silazane in the presence of an acid catalyst. Then, that polymer is reacted with an alkoxy functional alkenylsilane in the presence of a hydrosilylation catalyst to give the desired polymer. The polymers are useful in formulating room temperature curing sealants.
    Type: Grant
    Filed: July 24, 1995
    Date of Patent: August 13, 1996
    Assignee: Dow Corning Corporation
    Inventors: Tara N. Estes, Robert H. Krahnke
  • Patent number: 5530076
    Abstract: The invention is a curable composition whose essential structural elements are M and Q units and which provides a cured product that has a flexural modulus capable of withstanding practical applications. The curable organopolysiloxane composition comprises (A) an alkenyl-functional organopolysiloxane whose main components are the R.sup.1.sub.3 SiO.sub.1/2 and SiO.sub.4/2 units where R.sup.1 represents monovalent organic groups, (B) an SiH-containing organopolysiloxane whose main components are the R.sup.2.sub.3 SiO.sub.1/2 and SiO.sub.4/2 units where R.sup.2 represents the hydrogen atom and monovalent organic groups and (C) a platinum catalyst. In addition, the composition exhibits a post-cure flexural modulus of at least 100 MPa.
    Type: Grant
    Filed: March 14, 1995
    Date of Patent: June 25, 1996
    Assignee: Dow Corning Asia, Ltd.
    Inventors: Katsuya Eguchi, Toshio Suzuki
  • Patent number: 5480930
    Abstract: The present invention describes uncured fluorocarbon elastomer base compositions and cured fluorocarbon elastomer compositions comprising a fluorocarbon elastomer, an amorphous silicone resin, and optionally a polydiorganosiloxane gum or a hydrocarbon polymer elastomer. The cured fluorocarbon elastomers typically contain additional components such as an acid acceptor, a cure agent, and a filler. The cured compositions have high strength, low temperature flexibility, high solvent resistivity, and low fuel permeability.
    Type: Grant
    Filed: August 18, 1994
    Date of Patent: January 2, 1996
    Assignee: Dow Corning Corporation
    Inventors: Thomas M. Gentle, Gerald A. Gornowicz
  • Patent number: 5457158
    Abstract: A process is described for preparing blends of fluorocarbon plastomers such as vinylidene fluoride polymers with fluorosilicone elastomers to obtain materials having a unique combination of flexibility at low temperature and high mechanical strength. Vinylidene fluoride polymer is first exposed to radiation and then mixed with the fluorosilicone. Coagents such as diallylphtalate and triallylisocyanurate are also used to assist in grafting and compatibilizing the two polymers.
    Type: Grant
    Filed: July 11, 1994
    Date of Patent: October 10, 1995
    Assignee: Dow Corning Corporation
    Inventors: Gerardo Caporiccio, Liberato Mascia
  • Patent number: 5455697
    Abstract: A liquid crystal device wherein the liquid crystal material exhibits a smectic phase and cromprises at least one siloxane compound having the general formula ##STR1## in which R=alkyl, alkenyl or aryl, Q represents a monovalent group, for example alkyl --(CH.sub.2).sub.n OM', a chiral organic group, a dye group, a non-linear optic group or the group --(CH.sub.2).sub.n L in which L represents a siloxane group, M and M' each represent ##STR2## wherein A is carboxyl, T is CN, F or Cl and p=0 or 1, provided that when T is F or Cl x has a value of at least 2.
    Type: Grant
    Filed: January 21, 1994
    Date of Patent: October 3, 1995
    Assignee: Dow Corning Limited
    Inventors: Harry J. Coles, Jonathon P. Hannington, David R. Thomas
  • Patent number: 5395886
    Abstract: This invention relates to fluorohydrocarbon polymers which are modified by the incorporation of substitiuents bearing a functional group such as vinyl, allyl, acrylate, alkoxysilane, amido, sulfonic acid salt, pyridine, carboxylic ester, and carboxylic salt. The functional groups may be further reacted to obtain branching, grafting, or crosslinking of the polymers. Copolymers of vinylidene fluoride and hexafluoropropene such as VITON A rubber and KYNAR FLEX 2801 plastomer, are typical of the class of fluorohydrocarbon polymers which are modified to obtain the new materials of this invention.
    Type: Grant
    Filed: July 13, 1994
    Date of Patent: March 7, 1995
    Assignee: Dow Corning Corporation
    Inventors: Gerardo Caporiccio, Gerald A. Gornowicz
  • Patent number: 5367023
    Abstract: This invention relates to fluorohydrocarbon polymers which are modified by the incorporation of substitiuents bearing a functional group such as vinyl, allyl, acrylate, alkoxysilane, amido, sulfonic acid salt, pyridine, carboxylic ester, and carboxylic salt. The functional groups may be further reacted to obtain branching, grafting, or crosslinking of the polymers. Copolymers of vinylidene fluoride and hexafluoropropene such as VITON A rubber and KYNAR FLEX 2801 plastomer, are typical of the class of fluorohydrocarbon polymers which are modified to obtain the new materials of this invention.
    Type: Grant
    Filed: April 12, 1993
    Date of Patent: November 22, 1994
    Assignee: Dow Corning Corporation
    Inventors: Gerardo Caporiccio, Gerald A. Gornowicz
  • Patent number: 5300171
    Abstract: A pressure sensitive adhesive tape comprising a tape substrate having at least a portion of one or more sides coated with a silicone pressure sensitive adhesive is constructed using an adhesive which cures to a permanent adhesive. The adhesive is covered on the outer side with a release film, preferably coated with a fluorosilicone release layer, to allow storage of the tape. Preferably the curable silicone pressure sensitive adhesive is cured upon exposure to moisture, the tape therefore being stored in the absence of moisture. A silicone elastomeric structural glazing tape is made by using a silicone elastomer as the tape substrate. The tape can be used to bond glazing panels to building components without the use of other means of fastening.
    Type: Grant
    Filed: February 16, 1993
    Date of Patent: April 5, 1994
    Assignee: Dow Corning Corporation
    Inventors: Joseph T. Braun, Joseph N. Clark, Virgil J. Johnson, Shawn K. Mealey, William J. Schoenherr
  • Patent number: 5288832
    Abstract: Silethynylenedisiloxane polymers are described with repeating units represented by --R.sup.1 R.sup.2 SiC.tbd.CSiR.sup.3 R.sup.4 OSiR.sup.5 R.sup.6 O-- where R.sup.1 -R.sup.6 independently represent hydrogen atoms, alkyl groups, aryl groups, or alkenyl groups. The polymers are prepared by reacting a disilylacetylene compound represented by the formula X.sup.1 R.sup.1 R.sup.2 SiC.tbd.CSiR.sup.3 R.sup.4 X.sup.1 and a silane compound represented by the formula X.sup.2.sub.2 SiR.sup.5 R.sup.6 where X.sup.1 and X.sup.2 represent H, OH, OM, or a hydrolyzable group. X.sup.1 and X.sup.2 are not identical and are selected so that they undergo a condensation reaction to form a siloxane bond.
    Type: Grant
    Filed: January 25, 1993
    Date of Patent: February 22, 1994
    Assignee: Dow Corning Japan, Ltd.
    Inventor: Toshio Suzuki
  • Patent number: 5268336
    Abstract: A process for the preparation of substantially polycrystalline silicon carbide fibers is provided. The fibers may be fabricated to have a small diameter and are thermally stable at high temperatures. The process is carried out by initially forming fibers from a preceramic polymeric precursor comprising methylpolydisilylazane resins. The fibers are then infusibilized to render them nonmelting followed by a pyrolysis step in which the fibers are heated to a temperature in excess of 1600.degree. C. in a nonoxidizing atmosphere to form substantially polycrystalline silicon carbide fibers. The substantially polycrystalline silicon carbide fibers which are formed by the process of the present invention have at least 75% crystallinity and have a density of at least about 2.9 gm/cc.The polymeric precursor or the fibers contain, or have incorporated therein, at least about 0.2% by weight boron.
    Type: Grant
    Filed: June 18, 1990
    Date of Patent: December 7, 1993
    Assignee: Dow Corning Corporation
    Inventors: David C. Deleeuw, Jonathan Lipowitz, James A. Rabe
  • Patent number: 5254289
    Abstract: A polymeric material which exhibits nonlinear optical properties if undoped and conductive properties if doped. The polymer is prepared by polymerizing diethynylsilane compositions, the resulting polymeric material having a weight average molecular weight between about 20,000 and about 200,000 grams per mole. The polymer is prepared and catalytically polymerized by exposure to a catalyst, such as MoCl.sub.5 or W(CO).sub.6 /hv.
    Type: Grant
    Filed: May 4, 1992
    Date of Patent: October 19, 1993
    Assignee: Iowa State University
    Inventors: Thomas J. Barton, Sina Ijadi-Maghsoodi, Yi Pang