Patents Examined by Karen A. Hellender
  • Patent number: 5153250
    Abstract: Improved polyphthalamide compositions, particularly for injection molding applications, comprise a polyphthalamide component with at least two recurring units selected from terephthalamide, isophthalamide and adipamide units and having high heat deflection temperature when filled with glass fibers; reinforcing fibers; and effective amounts of particulate talc. Molded articles prepared from such compositions exhibit excellent mechanical and thermal properties, including high heat deflection temperature, even when molded using molds heated below Tg of the polyphthalamide component, often facilitating molding using steam or hot water-heated molds.
    Type: Grant
    Filed: June 20, 1991
    Date of Patent: October 6, 1992
    Assignee: Amoco Corporation
    Inventor: David P. Sinclair
  • Patent number: 5153258
    Abstract: The present invention provides a silicone antifoaming agent composition excellent in the persistence of the foam controlling effect. The silicone antifoaming agent composition comprises a polydiorganosiloxane and silica, which form an antifoaming agent to be improved, and 1 to 200 parts by weight per 100 parts by weight of the sum total of the polydiorganosiloxane plus silica of a lightly crosslinked siloxane having fluidity.
    Type: Grant
    Filed: December 13, 1990
    Date of Patent: October 6, 1992
    Assignee: Dow Corning K.K.
    Inventors: Hideki Nakahara, Koichi Aizawa
  • Patent number: 5153238
    Abstract: Storage stable and gel-free organosiloxane compositions in the form of flowable powders are prepared by blending a high consistency polydiorganosiloxane into a quantity of fluidized reinforcing filler that is heated to a temperature of from 100.degree. to 200.degree. C. prior to or immediately following introduction of the polydiorganosiloxane. When silica is the reinforcing filler, the filler is typically treated with an anti-creping agent either prior to or during this blending process. The resultant mixture is heated while being subjected to shearing forces that reduce its average particle size to achieve a flowable powder.
    Type: Grant
    Filed: November 12, 1991
    Date of Patent: October 6, 1992
    Assignee: Dow Corning Corporation
    Inventors: Carl J. Bilgrien, Chi-long Lee, Steven P. Mullan, Herschel H. Reese
  • Patent number: 5149765
    Abstract: The invention relates to a series of novel organofunctional silicone polymers which have a phosphate terminal functionality present within the polymer. Compounds of the invention, by virtue of their phosphate group, provide a nonvolatile lubricant antistat which can be applied to a variety of fibers. The compounds of the invention deposit on the fiber surface thereby altering the surface's physical properties. Compounds of the present invention by virtue of their linear nature are film formers on a variety of substrates, including hair and skin.The compounds of the present invention are prepared by phosphation of a hydroxyl group on the silicone polymer. The compounds useful as raw materials are terminal dimethicone copolyols. The introduction of a phosphate group onto the silicone polymer is achieved by reaction of the hydroxyl group on the silicone with a suitable phosphating reagent.
    Type: Grant
    Filed: October 17, 1991
    Date of Patent: September 22, 1992
    Assignee: Siltech Inc.
    Inventor: Anthony J. O'Lenick, Jr.
  • Patent number: 5149732
    Abstract: Rubber compositions are disclosed for integral attachment of polymeric and metallic materials. Improved bondability is attributed to the use of a selected base rubber blended with a selected class of inorganic or organic fillers, silane compounds and vulcanizing agents such that the finished composition is provided with a specified range of Mooney viscosities. Also disclosed is a method of hose-metal fitting connection by the application of the composition. Gas- and oil-impermeability characteristics are greatly enhanced.
    Type: Grant
    Filed: March 6, 1990
    Date of Patent: September 22, 1992
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Shigeru Igarashi, Osamu Ozawa, Tetsu Kitami
  • Patent number: 5147957
    Abstract: Azlactone functional silicon containing compounds are prepared from alkenyl azlactones and SiH containing compounds in a hydrosilation reaction. The resulting compounds can be reacted with nucleophilic compounds to provide amidoacyl group containing silicon compounds. When the amidoacyl group containing silicon compounds contain ethylenic unsaturated they can be polymerized to provide polymeric networks useful as pressure sensitive adhesives release compositions, or elastomeric materials.
    Type: Grant
    Filed: June 1, 1990
    Date of Patent: September 15, 1992
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Kanta Kumar
  • Patent number: 5147916
    Abstract: Hot-melt silicone pressure sensitive adhesive composition, methods of using the composition, article made using the composition, and methods of making articles using the composition. The hot-melt silicone pressure sensitive adhesive composition includes a mixture of (i) a silicone resin, (ii) a silicone fluid, and (iii) from about 0.5 to about 10 weight percent, based on the total weight of the silicone resin and the silicone fluid, of a non-flammable hydrocarbon having a weight-average molecular weight of from about 300 to about 1500 as measured by gel permeation chromatography calibrated with narrow distribution polydimethylsiloxane standards.
    Type: Grant
    Filed: February 21, 1990
    Date of Patent: September 15, 1992
    Assignee: Dow Corning Corporation
    Inventor: Randall P. Sweet
  • Patent number: 5145933
    Abstract: Non-friable siloxane gels which can be used for gel dressings and in medical prostheses are made from compositions comprising (A) alkenyl-containing polydiorganosiloxanes; (B) hydrosilicon compounds having at least 3 Si-H groups; (C) SiH end-blocked polydiorganosiloxanes and (D) a catalyst. These compositions cure rapidly at room temperature having a ratio (RHAlk) of SiH:Si-Alkenyl of from 3:1 to 20:1, the percentage of silicon-bonded H atoms provided by (C) not being less than 81.36-(3.6.times.RHAlk) and having a value of from 10% to 90%.
    Type: Grant
    Filed: March 7, 1991
    Date of Patent: September 8, 1992
    Assignee: Dow Corning France S.A.
    Inventors: Bernard F. R. Grisoni, David Pocknell
  • Patent number: 5145907
    Abstract: A shelf stable aqueous silicone emulsion which yields an elastomer upon removal of the water is produced by combining a reactive polydiorganosiloxane present as a cationic or nonionic emulsion of dispersed particles in water, a crosslinker, and a tin catalyst, the tin catalyst being in the form of a divalent tin atom combined with organic radicals. The emulsion can be reinforced with colloidal silica without effecting the shelf life of the reinforced emulsion.
    Type: Grant
    Filed: August 31, 1990
    Date of Patent: September 8, 1992
    Assignee: Dow Corning Corporation
    Inventors: Robert E. Kalinowski, Donald T. Liles, Nick E. Shephard
  • Patent number: 5140061
    Abstract: Aqueous silicone dispersions crosslinkable into elastomeric state upon removal of water therefrom, well adapted for the production of paints and silicone elastomer seals, e.g., for the construction industry, include:(A) 100 parts by weight of an oil-in-water emulsion of an .alpha.,.omega.-(dihydroxy)polydiorganosiloxane, stabilized with an anionic and/or nonionic surfactant;(B) 0.1 to 20 parts by weight of an aminosilane and/or amidosilane;(C) 0 to 3 parts by weight of a metal curing catalyst; and(D) 0 to 250 parts by weight of a non-siliceous inorganic filler, such emulsion having a pH of from 7 to 13 and a dry solids content of at least 40%.
    Type: Grant
    Filed: February 5, 1990
    Date of Patent: August 18, 1992
    Assignee: Rhone-Poulenc Chimie
    Inventor: Michel Feder
  • Patent number: 5138009
    Abstract: A curable composition comprises an organopolysiloxane-polyoxyalkylene block copolymer terminated at both ends of a molecular chain with a lower aliphatic unsaturated group and consists essentially of organopolysiloxane units having a main chain of the formula, (R.sup.1 R.sup.2 SiO)m, and polyoxyalkylene units of the formula, (R.sup.3 O)n. The organopolysiloxane units and the polyoxyalkylene units are bonded through R.sup.1 R.sup.2 SiR.sup.4 groups, wherein R.sup.1 and R.sup.2 independently represent an unsubstituted or substituted monovalent hydrocarbon group except for an aliphatic unsaturated group, R.sup.3 and R.sup.4 independently represent a divalent hydrocarbon group, and m and n are, respectively, defined integers. The composition further comprises an organohydrogenpolysiloxane having at least two .tbd.SiH groups in one molecule and a curing agent therefor.
    Type: Grant
    Filed: March 20, 1991
    Date of Patent: August 11, 1992
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventor: Yoshio Inoue
  • Patent number: 5133897
    Abstract: Stable aqueous emulsions of polysiloxane oil and polysiloxane-paraffin oil are disclosed. The emulsifiers are alkylpolyglycosides of the formula R--O--Z.sub.n wherein R represents a linear or branched, saturated or unsaturated alkyl radical having 8-16 carbon atoms, Z.sub.n represents an alkylolilgoglycoside radical and n is 1-5. The resulting aqueous polysiloxane emulsions and polysiloxane-paraffin oil emulsions have long shelf lives.
    Type: Grant
    Filed: July 30, 1990
    Date of Patent: July 28, 1992
    Assignee: Huels Aktiengesellschaft
    Inventor: Dieter Balzer
  • Patent number: 5132337
    Abstract: A pasty dental material, which hardens to a high-gloss polishable mass in the presence of an initiator, comprising a polymerizable bonding agent and a finely divided filler based on special heterosiloxanes.
    Type: Grant
    Filed: April 20, 1990
    Date of Patent: July 21, 1992
    Assignee: Degussa Aktiengesellschaft
    Inventors: Peter Panster, Ralf Janda, Peter Kleinschmit
  • Patent number: 5132353
    Abstract: A novel molding composition is disclosed which comprises polybutylene terephthalate, polyethylene terephthalate, and 20-85% of zinc oxide by total weight of said molding composition.
    Type: Grant
    Filed: October 20, 1989
    Date of Patent: July 21, 1992
    Assignee: General Electric Company
    Inventor: Lawrence R. Wallace
  • Patent number: 5132340
    Abstract: A process is disclosed whereby silica filler may be surface treated in situ following addition to a curable polysiloxane gum.
    Type: Grant
    Filed: October 30, 1991
    Date of Patent: July 21, 1992
    Assignee: General Electric Company
    Inventors: Edwin R. Evans, Lawrence G. Waters, Michael J. Rosko
  • Patent number: 5126389
    Abstract: The silicone rubber compositions of the present invention for treatment of fiber structures are cured by a condensation reaction and are thus free from drawbacks of addition reaction curing type. The compositions contain mercaptoalkyl group-containing di- or trialkoxysilanes and aliphatic monohydroxy alcohols. As a result, even when inorganic filler content is increased in dispersion, viscosity stability was excellent, and high-strength films are readily obtained. Condensation reaction-curable silicone rubbers for treatment of fiber structure are provided which have excellent abrasion resistance and a pot life above 8 hours.
    Type: Grant
    Filed: July 11, 1990
    Date of Patent: June 30, 1992
    Assignee: Dow Corning Toray Silicone Company, Ltd.
    Inventors: Isao Ona, Masaru Ozaki
  • Patent number: 5118754
    Abstract: A curable liquid silicone rubber composition comprising a diorganopolysiloxane having the general formula: R.sup.1.sub.a SiO.sub.(4-a)/2 wherein R.sup.1 is a substituted or unsubstituted monovalent hydrocarbon group and a ranges from 1.95 to 2.05, the diorganopolysiloxane containing at least two lower alkenyl groups attached to a silicon atom per molecule, an organohydrogenpolysiloxane containing at least two hydrogen atoms attached to silicon atoms per molecule, finely divided silica, and a platinum catalyst is improved in fatigue resistance by blending a specific cyclic or linear diorganopolysiloxane.
    Type: Grant
    Filed: July 6, 1990
    Date of Patent: June 2, 1992
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Masanobu Miyakoshi, Hironao Fujiki, Takeo Yoshida
  • Patent number: 5114764
    Abstract: Novel organopolysiloxane compositions that are storage-stable in the absence of moisture, but curable into elastomeric state in the presence of moisture, nonetheless devoid of any organometallic curing catalyst, include (A) an .alpha.,.omega.-dihydroxydiorganopolysiloxane oil, (B) a ketiminoxysilane crosslinking agent, (C) inorganic filler material, (D) an organofunctional silane and (E) a substituted hydroxylamine; the crosslinked elastomers produced from these organopolysiloxane compositions are well adopted for such applications as foodstuff packaging, medical bandaging and antifouling/anti-soiled coatings.
    Type: Grant
    Filed: September 16, 1991
    Date of Patent: May 19, 1992
    Assignee: Rhone-Poulenc Chimie
    Inventor: Patrice Perrin
  • Patent number: 5115056
    Abstract: Fluorine and/or silicone containing block copolymers are described which are the copolymerization product of mono; di- or trivinyl substituted poly(alkylene oxide) prepolymers (A) and fluoroalkyl-alkylene acrylates or methacrylates (B1), oligosiloxy-silyl alkyl-acrylates or methacrylates (B2), and optionally other copolymerizable comonomers (C). The novel block copolymers are prepared in solution or bulk and are characterized by high oxygen permeability, flexibility and wettability and are therefore well suited as biocompatible polymers, especially as contact lenses.
    Type: Grant
    Filed: February 28, 1990
    Date of Patent: May 19, 1992
    Assignee: Ciba-Geigy Corporation
    Inventors: Karl F. Mueller, Walter L. Plankl
  • Patent number: 5112885
    Abstract: A room temperature vulcanizable silicone rubber composition is described. The composition comprises an organopolysiloxane which is blocked with a hydroxyl group or hydrolyzable group at ends of the molecular chain thereof, fumed silica which is surface treated with a monoorganosilane of the general formula, R.sup.1 SiY.sub.3, or a monoorganopolysilazane of the general compositional formula, R.sup.1 Si(NH).sub.3/2, wherein R.sup.1 in each formula represents a monovalent hydrocarbon group and each Y represents a hydrolyzable group and which has a specific area of not less than 50 m.sup.2 /g, and an organosilicon compound of the general formula, R.sup.2.sub.1 SiZ.sub.4-1, wherein R.sup.2 represents an unsubstituted or substituted monovalent hydrocarbon group, Z represents a hydrolyzable group, and 1 is a value of 0 or 1, or its partially hydrolyzed product. The composition may further comprise a promoter for the vulcanization.
    Type: Grant
    Filed: April 26, 1990
    Date of Patent: May 12, 1992
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Yoshio Inoue, Masatoshi Arai, Hironao Fujiki