Patents Represented by Attorney Robert F. Fleming, Jr.
  • Patent number: 4303566
    Abstract: Condensation products of phenyltrialkoxysilanes (and optionally methyltrialkoxysilanes) and 2-methyl-2,4-pentane diol containing at least 25 percent by weight phenyl radicals are employed as internal lubricants for clear thermoplastics. For example, 1 percent by weight of ##STR1## is added to polystyrene to give an optically clear material having good surface properties.
    Type: Grant
    Filed: June 30, 1980
    Date of Patent: December 1, 1981
    Assignee: Dow Corning Corporation
    Inventors: Robert E. Kalinowski, Gary A. Vincent
  • Patent number: 4303537
    Abstract: A stable aqueous dispersion of a solid lubricant combination of MoS.sub.2 and graphite and an acrylic resin is used to coat bearing members to provide an air drying long lasting lubricant coating. A typical formulation is 60 to 80% water, 15 to 30% MoS.sub.2 and graphite in the weight ratio of 1.5:1 to 2.5:1 and 5 to 10% polybutyl acrylate. The MoS.sub.2 and graphite preferably have a particle size of less than 5 .mu.m.
    Type: Grant
    Filed: October 9, 1979
    Date of Patent: December 1, 1981
    Assignee: Dow Corning GmbH
    Inventors: Werner Laepple, Gisela Wienert
  • Patent number: 4289859
    Abstract: Phenyl containing siloxane fluids are added to transparent thermoplastic polymers to give transparent thermoplastics having improved internal lubrication. For example, PhSi(OMe).sub.3 is equilibrated with (Me.sub.2 SiO).sub.x to give a fluid containing 28 percent by weight phenyl radicals, a PhSiO.sub.3 /2 to Me.sub.2 SiO ratio of 0.72 and an OMe to Si ratio of 0.78. This fluid was added to polystyrene in amount of 1 percent by weight to give a transparent plastic which exhibits no bleed and had excellent surface lubricity.
    Type: Grant
    Filed: June 2, 1980
    Date of Patent: September 15, 1981
    Assignee: Dow Corning Corporation
    Inventors: Robert E. Kalinowski, Gary A. Vincent
  • Patent number: 4279765
    Abstract: A soap composition which contains from 0.01 to 6% by weight of a polydiorganosiloxane having a molecular weight of at least 2000 and in which at least one of the silicon-bonded substituents is a monovalent group composed of carbon, hydrogen, nitrogen and, optionally, oxygen, the monovalent group having therein at least one amino group. The polydiorganosiloxane imparts a durable soft feel to skin contacted with the soap.
    Type: Grant
    Filed: September 8, 1980
    Date of Patent: July 21, 1981
    Assignee: Dow Corning Limited
    Inventors: Michael P. L. Hill, Anthony N. Tizard
  • Patent number: 4273634
    Abstract: An aqueous silicone emulsion is described which provides an elastomeric product upon removal of the water under ambient conditions. The emulsion comprises a continuous water phase and a dispersed phase of crosslinked silicone. The silicone phase is the product of radical produced crosslinking of hydroxyl endblocked polydiorganosiloxane. The polydiorganosiloxane is crosslinked after it has been dispersed in water. Preferred polydiorganosiloxanes contain vinyl-substituted siloxane units and can be crosslinked by high energy radiation or the combined action of heat and an organic peroxide.
    Type: Grant
    Filed: November 14, 1979
    Date of Patent: June 16, 1981
    Assignee: Dow Corning Corporation
    Inventors: John C. Saam, Robert L. Wegener
  • Patent number: 4234574
    Abstract: Siloxanes having units containing the grouping (XOQO) Si.tbd. in which X represents hydrogen or a chemical bond linking the adjacent oxygen atom to the silicon atom of a silyl or siloxy group and Q represents ##STR1## or--CH(C.sub.3 H.sub.7)CH(C.sub.2 H.sub.5)CH.sub.2 --They are prepared by reacting a siloxane with 2-butyl-2-ethylpropane-1,3-diol or 2-ethylhexane-1,3-diol and are useful for imparting insect repellent properties to surfaces.
    Type: Grant
    Filed: June 8, 1979
    Date of Patent: November 18, 1980
    Assignee: Dow Corning Limited
    Inventor: Stephen Westall
  • Patent number: 4202811
    Abstract: An improved curable siloxane-epoxy molding composition which is a blend of a phenylpolysiloxane, an aluminum catalyst, a silica filler, and an aromatic polyepoxide resin which contains at least 38 percent by weight of a polydiglycidyl ether of a bisphenol is disclosed. The molding composition has improved thermal shock crack resistance when used to encapsulate electronic devices.
    Type: Grant
    Filed: June 21, 1978
    Date of Patent: May 13, 1980
    Assignee: Dow Corning Corporation
    Inventors: Keith W. Michael, Alvin L. Moore
  • Patent number: 4198131
    Abstract: Optical devices such as corneal, scleral and interocular lenses are made from phenyl-containing siloxane resins. They combine a high degree of oxygen transmission with ease of fabrication inherent to hard materials, thereby providing increased wearer comfort and ease of fabrication. A typical resin is a copolymer of phenyl, vinyl and methyl siloxanes having at least about 0.2 phenyl groups per silicon.
    Type: Grant
    Filed: May 15, 1978
    Date of Patent: April 15, 1980
    Assignee: Dow Corning Corporation
    Inventors: Arthur A. Birdsall, John K. Fitzgerald, David P. Jones, Keith E. Polmanteer
  • Patent number: 4187208
    Abstract: A composition which is curable to a flame retardant, pigmented silicone rubber. The composition consists essentially of a polydiorganosiloxane convertible to the solid elastic state, a reinforcing silica filler, an organic peroxide curing agent, platinum and a pyrazolone pigment. Such pigments have the advantage of not substantially reducing the flame retardant properties of the rubber.
    Type: Grant
    Filed: March 30, 1978
    Date of Patent: February 5, 1980
    Assignee: Dow Corning Limited
    Inventor: Hewart W. Winnan
  • Patent number: 4177176
    Abstract: Composition comprising (A) a polydiorganosiloxane having molecular weight of at least 2500 and terminal --OX groups in which X is hydrogen, lower alkyl or alkoxyalkyl, at least two of the substituents in the polydiorganosiloxane containing at least two amine groups, the remainder preferably being methyl radicals, and (B) an organosiloxane having at least 3 silicon-bonded hydrogen atoms. The compositions can be applied to keratinous fibres to render such fibres shrink resistant and are particularly suitable for application in the form of an aqueous emulsion.
    Type: Grant
    Filed: May 7, 1976
    Date of Patent: December 4, 1979
    Assignee: Dow Corning Limited
    Inventors: Peter M. Burrill, Frank S. Rankin
  • Patent number: 4125510
    Abstract: The crack resistance of phenyl silicone molding compounds containing siliceous fillers is improved by incorporating therein from 4 to 15 percent by weight based on the combined weight of the resins of an aromatic epoxy resin having an epoxide equivalent of from 475 to 2000. These molding compounds are particularly suitable for encapsulating electronic devices such as diodes.
    Type: Grant
    Filed: March 1, 1977
    Date of Patent: November 14, 1978
    Assignee: Dow Corning Corporation
    Inventor: Robert C. Antonen
  • Patent number: 4117028
    Abstract: Pressure sensitive adhesives which require no cure to develop maximum adhesive properties are obtained from mixtures of (1) from 30 to 70 weight percent of block copolymers of A styrenic monomers and B polydimethylsiloxane in which the styrenic blocks account for from 5 to 25 percent by weight of the total weight of the block copolymer and (2) from 30 to 70 percent by weight based on the total weight of (1) and (2) of a copolymer of Mw.sub.3 SiO.sub..5 and SiO.sub.2 units in which the mol ratio of Me.sub.3 SiO.sub..5 to SiO.sub.2 is from 0.6:1 to 0.9:1. A typical example of (1) is a block copolymer of styrene and dimethylpolysiloxane.
    Type: Grant
    Filed: April 21, 1977
    Date of Patent: September 26, 1978
    Assignee: Dow Corning Corporation
    Inventor: James R. Hahn
  • Patent number: 4108882
    Abstract: Methylchlorosilanes are reacted in vapor phase with methyl alcohol (MeOH) in contact with a catalyst comprising a methyl pyridinium chloride or other heterocyclic aromatic methyl quaternary chloride to give the corresponding methyl siloxane and methyl chloride. This method gives extremely low yields of dimethyl ether. For example a mixture of Me.sub.2 SiCl.sub.2 (dimethyldichlorosilane) and MeOH (methylalcohol) vapors is passed through molten methyl pyridinium chloride at 150.degree. C to give cyclic dimethyl polysiloxanes and methyl chloride.
    Type: Grant
    Filed: October 27, 1977
    Date of Patent: August 22, 1978
    Assignee: Dow Corning Corporation
    Inventor: Louis G. Mahone
  • Patent number: 4107196
    Abstract: N-tertiarybutyl silylamides of the formula ##STR1## WHERE N IS 2 OR 3, ARE EXTREMELY RAPID SILYLATING AGENTS AND ARE ESPECIALLY GOOD FOR SILYLATION IN CONNECTION WITH THE SEPARATION OF COMPLEX MIXTURES. A typical compound is ##STR2##*In this application the following abbreviations are used: t-Bu for the tertiarybutyl radical, Me for the methyl radical, Et for the ethyl radical, Vi for the vinyl radical, Ph for the phenyl radical and i-Pr for the isopropyl radical.
    Type: Grant
    Filed: December 7, 1977
    Date of Patent: August 15, 1978
    Assignee: Dow Corning Corporation
    Inventors: Cecil L. Frye, Thomas H. Lane
  • Patent number: 4106948
    Abstract: Aqueous compositions obtained by mixing together water, hydroxyethyl cellulose and an organosilicon compound RSi(OR').sub.3, wherein R represents methyl, ethyl or vinyl and each R' represents methyl, ethyl or methoxyethoxy. The compositions are useful as primers and protective coatings for surfaces, particularly wood.
    Type: Grant
    Filed: May 25, 1977
    Date of Patent: August 15, 1978
    Assignee: Dow Corning Limited
    Inventors: Bryan Ewart Cooper, Paul Lance Millard
  • Patent number: 4098572
    Abstract: An aqueous siloxane-in-water emulsion containing (A) a polydiorganosiloxane having terminal --OX radicals in which X is hydrogen, alkyl or alkoxyalkyl, and at least two amino-containing substituents per molecule, (B) a siloxane containing silicon-hydrogen groups, (C) one or more nonionic and/or cationic emulsifying agents and (D) magnesium sulphate or sodium sulphate. The compositions can be applied to keratinous fibres by an exhaustion technique to render the fibres resistant to shrinkage during laundering.
    Type: Grant
    Filed: May 27, 1977
    Date of Patent: July 4, 1978
    Assignee: Dow Corning Limited
    Inventor: Charles Smith
  • Patent number: 4098701
    Abstract: Process for the treatment of cellulosic or synthetic fibres, or blends of these, to impart resilience and anti-pilling properties. The process comprises applying to the fibres a composition, especially an aqueous emulsion, containing (A) a polydiorganosiloxane in which at least two silicon-bonded substituents contain at least two amino groups, (B) a siloxane having silicon-bonded hydrogen atoms and (C) a siloxane curing catalyst.
    Type: Grant
    Filed: June 10, 1977
    Date of Patent: July 4, 1978
    Assignee: Dow Corning Limited
    Inventors: Peter Martin Burrill, William Samuel Kohnstamm
  • Patent number: 4082790
    Abstract: Mercaptans are prepared by reacting an organic chloride or bromide with a mixture of H.sub.2 S and ammonia or an amine at a temperature of 0.degree. to 175.degree. C. under autogenous pressure. The reaction can be carried out in the presence of a polar solvent. For example, 3-chloropropyltrimethoxysilane is mixed with H.sub.2 S and ammonia in methanol and heated in a closed container at 100.degree. C. for 18 hours.
    Type: Grant
    Filed: March 10, 1975
    Date of Patent: April 4, 1978
    Assignee: Dow Corning Corporation
    Inventor: John L. Speier
  • Patent number: RE29697
    Abstract: Organosilicon resins having excellent thermal shock resistance in either the filled or unfilled state are obtained by curing mixtures of (A) a copolymer of (in mole percent) 35 to 42 monophenylsiloxane, 0 to 12 diphenylsiloxane, 35 to 50 dimethylsiloxane and 8 to 15 vinylmethylsiloxane with (B) a copolymer of (in mole percent) 8 to 15 diphenylsiloxane, 30 to 55 methylhydrogensiloxane, 28 to 45 dimethylsiloxane and 5 to 12 trimethylsiloxane in amount such that there is a stoichiometric amount of SiH and Si vinyl .+-. 10 percent of either ingredient. The preferred fillers are mixtures of 1/32 to 1/8 inch glass fibers and 2 to 8 microns crystalline silica.
    Type: Grant
    Filed: February 28, 1977
    Date of Patent: July 11, 1978
    Assignee: Dow Corning Corporation
    Inventor: Alan E. Mink
  • Patent number: RE30431
    Abstract: The impact strength of certain thermoplastic vinylic polymers is improved by polymerizing the corresponding monomers in an emulsion of a diorganosiloxane containing units of the formula HSR'SiR.sub.n O.sub.3--n/2. For example a styrene acrylonitrile copolymer containing 20 percent by weight of a dimethylsiloxane-3-mercaptopropylsiloxane copolymer having 1 mol percent mercaptosiloxane has an Izod notched impact strength of 10.8 foot pounds per inch.
    Type: Grant
    Filed: August 21, 1978
    Date of Patent: November 4, 1980
    Assignee: Dow Corning Corporation
    Inventors: James R. Falender, Claudia M. Mettler, John C. Saam