Patents Represented by Attorney Roger H. Borrousch
  • Patent number: 5983593
    Abstract: Sealed insulating glass units with multiple-pane construction containing an intermediate taut, flexible heat shrunk plastic sheet are made using silicone edge sealant which exhibits a sheet creep of less than 0.018 cm after 500 hours at 71.degree. C. The plastic sheet remains substantially wrinkle free by the use of such silicone edge sealants.
    Type: Grant
    Filed: May 16, 1997
    Date of Patent: November 16, 1999
    Assignee: Dow Corning Corporation
    Inventors: Lawrence Donald Carbary, Chris Edward Nowak, William Robert O'Brien, Leslie Joan Waters
  • Patent number: 5973023
    Abstract: The discoloration of a non-acidic room temperature vulcanizable silicone sealant containing a ultraviolet radiation degradable fungicide is delayed by adding zinc oxide.
    Type: Grant
    Filed: April 4, 1996
    Date of Patent: October 26, 1999
    Assignee: Dow Corning Corporation
    Inventors: Michael Gene Altes, Virginia Kay O'Neil, Arthur James Tselepis, Andreas Thomas Franz Wolf
  • Patent number: 5908909
    Abstract: A composition curable in presence of atmospheric moisture to an elastomeric body, comprising (A) the product formed by mixing a polymeric material having at least two groups bonded to silicon which are hydroxyl or alkoxy group and an alkoxysilane curative and (B) a titanium compound according to the general formula Ti(OR).sub.x (OR').sub.y (OR*).sub.z where x is 0 to 0.4 inclusive, y is 0 to 3.9, z is 0.1 to 4, x+y+z=4, R* is 2,4-dimethyl-3-pentyl, R' represents a monovalent tertiary aliphatic hydrocarbon group, and JR represents a monovalent linear aliphatic hydrocarbon group having 1 to 6 carbon atoms. The compositions cure quickly and do not yellow.
    Type: Grant
    Filed: September 26, 1997
    Date of Patent: June 1, 1999
    Assignee: Dow Corning S. A.
    Inventors: Francois De Buyl, Patrick Leempoel
  • Patent number: 5861460
    Abstract: A highly productive, continuous method for the production of room-temperature-curable organopolysiloxane compositions is obtained by continuously feeding 100 parts by weight of a diorganopolysiloxane with a viscosity at 25.degree. C. of 0.1 to 500 Pa.
    Type: Grant
    Filed: March 28, 1996
    Date of Patent: January 19, 1999
    Assignee: Dow Corning Toray Silicone Co., LTD.
    Inventors: Mitsuo Hamada, Tomoo Kinoshita, Hideyuki Mori, Junya Yokoi
  • Patent number: 5844038
    Abstract: The present invention discloses the use of a polymer chain having at least one carboxylic acid anhydride group as a consistency stabilizer in the base part of a two-part silicone sealant. The base part consists essentially of the consistency stabilizer, 100 parts by weight of a polymeric material having not less than two groups bonded to silicon which are hydroxyl or hydrolysable groups, 5 to 150 parts by weight of filler and, optionally, pigments and/or plasticizers.
    Type: Grant
    Filed: January 27, 1997
    Date of Patent: December 1, 1998
    Assignee: Dow Corning S. A.
    Inventors: Dominique Culot, Patrick Deglasse, Sesto Di Marco, Jean Iker
  • Patent number: 5840805
    Abstract: A highly storage-stable room-temperature-curable organopolysiloxane composition that cures to yield a product whose surface resists staining and that does not cause staining of the neighboring regions of the substrate in contact with said cured product. The organopolysiloxane composition is made from a polydiorganosiloxane, an imidazolinyl-functional organosiloxane, a filler, and a crosslinking compound which is a Si-bonded hydrolyzable group-containing organosilane or organosiloxane oligomer.
    Type: Grant
    Filed: October 25, 1995
    Date of Patent: November 24, 1998
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Hisataka Nakashima, Shigeki Sugiyama
  • Patent number: 5840794
    Abstract: An RTV sealant composition of a polymer with silicon-containing endgroups with at least two silicon-bonded alkoxy groups, a titanium catalyst of the formulaTi(OR.sup.2).sub.(4-y) (OR.sup.3).sub.ywhere each R.sup.2 is a monovalent tertiary aliphatic hydrocarbon radical and a monovalent branched-secondary aliphatic hydrocarbon radical, each R.sup.3 is a monovalent linear aliphatic hydrocarbon radical having from 1 to 6 carbon atoms per radical, y has an average value of from 0 to 1 inclusive, a filler, and an alkoxysilane having at least two silicon-bonded alkoxy groups. These sealant compositions exhibit a rapid formation of green strength, cure rapidly, and do not yellow or discolor.
    Type: Grant
    Filed: August 21, 1997
    Date of Patent: November 24, 1998
    Assignee: Dow Corning Corporation
    Inventor: Richard Alan Palmer
  • Patent number: 5833798
    Abstract: A moisture curable composition comprises a mixture and/or a reaction product of a polymeric material having not less than two groups bonded to silicon which are hydroxyl or hydrolyzable groups, an alkoxysilane curative, an adhesion promoter and catalyst material for catalyzing the condensation reaction between the polymeric material and the alkoxysilane curative. The adhesion promoter comprises a silicone-organic copolymer consisting of units (I) according to the general formula R.sub.a SiO.sub.(4-a)/2 and units (ii) according to the general formula R.sub.b R'SiO.sub.(3-b)/2 where R represents a monovalent hydrocarbon group and R' represents an oxyalkylene chain R.sup.6 (C.sub.2 H.sub.4 O).sub.x (C.sub.3 H.sub.6 O).sub.y Z in which R.sup.6 represents a hydrocarbon linkage to a silicon atom, Z represents H or a carboxylic acid residue.
    Type: Grant
    Filed: April 2, 1997
    Date of Patent: November 10, 1998
    Assignee: Dow Corning S. A.
    Inventor: Patrick Leempoel
  • Patent number: 5789480
    Abstract: A method for the preparation of one-package room-temperature-curable silicone compositions that do not slump prior to their cure, do not crack or fissure during their cure even when deformed by an external force, and do not yellow where an example of the room-temperature-curable silicone compositions is(a) hydroxyl-terminated diorganopolysiloxane,(b) oxime-functional organosilicon compound, and(c) inorganic filleraccording to the following four steps:step (1) in which 20 to 70 weight % of the total amount of component (a) is mixed with methyltris(methyl ethyl ketoximo)silane,step (2) in which component (c) is added and mixed into the mixture prepared in step (1),step (3) in which 30 to 80 weight % of the total amount of component (a) is mixed with vinyltris(methyl ethyl ketoximo)-silane,step (4) in which the mixture prepared in step (3) is mixed with the mixture prepared in step (2).
    Type: Grant
    Filed: March 27, 1996
    Date of Patent: August 4, 1998
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Hiroshi Adachi, Toshio Saruyama, Shigeki Sugiyama, Itsuo Toyoda
  • Patent number: 5780543
    Abstract: One-package room-temperature-curable silicone elastomer compositions that do not slump prior to their cure, that provide a suitable processing or working time, that do not crack or fissure during their cure even when deformed by an external force, and that do not yellow during storage or after curing are prepared by mixing (A) the reaction mixture of(a) hydroxyl-terminated diorganopolysiloxane and(b) alkyl-containing oximosilaneor optionally (b) alonewith (B) the reaction mixture of(a) hydroxy-terminated diorganopolysiloxane and(c) vinyl-functional oximosilaneand by thereafter mixing in(C) inorganic filler.
    Type: Grant
    Filed: March 27, 1996
    Date of Patent: July 14, 1998
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Hiroshi Adachi, Toshio Saruyama
  • Patent number: 5733996
    Abstract: The specification describes and claims a composition curable in presence of atmospheric moisture to an elastomeric body, comprising (A) the product formed by mixing a polymeric material having at least two groups bonded to silicon which are hydroxyl or hydrolysable (eg alkoxy) groups and an alkoxysilane curative and (B) a compound according to the general formula M?OR!.sub.x ?OR'!.sub.y where M represents a metal having a valency of 4 selected from Group IVB of the Periodic Table and is preferably titanium, x has a value from 0 to 1, y has a value from 3 to 4 and (x+y)=4, R' represents a monovalent tertiary aliphatic hydrocarbon group and R represents a monovalent linear aliphatic hydrocarbon group having 1 to 6 carbon atoms which is different from R'. Preferred compounds (B) are those in which R' represents C(R.sup.2 R.sup.3 R.sup.4) in which each of R.sup.2, R.sup.3 and R.sup.
    Type: Grant
    Filed: June 4, 1996
    Date of Patent: March 31, 1998
    Assignee: Dow Corning S.A.
    Inventors: Francois De Buyl, Patrick Leempoel
  • Patent number: 5733960
    Abstract: The longevity of a surface driving oil layer on a room temperature vulcanizable silicone sealant is increased by adding zinc oxide to a non-acidic composition and exposing the composition to atmospheric moisture which forms the surface drying oil layer on an air exposed surface.
    Type: Grant
    Filed: April 4, 1996
    Date of Patent: March 31, 1998
    Assignee: Dow Corning Corporation
    Inventors: Michael Gene Altes, Virginia Kay O'Neil, Arthur James Tselepis, Andreas Thomas Franz Wolf
  • Patent number: 5708076
    Abstract: A room temperature-curable organopolysiloxane composition with excellent extrudability and self-extinguishing properties is made from a hydroxyl endblocked polydiorganosiloxane, aluminum hydroxide having an average particle size not exceeding 50 micrometers, colloidal calcium carbonate, platinum or a platinum compound, and a crosslinking silane or siloxane having at least three hydrolyzable groups.
    Type: Grant
    Filed: January 27, 1997
    Date of Patent: January 13, 1998
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Yuichi Tsuji, Miyoji Fukayama
  • Patent number: 5705587
    Abstract: A room-temperature-curable silicone elastomer composition obtained from diorganopolysiloxane that is endblocked by silanol at both molecular chain terminals and diorganopolysiloxane that is endblocked at one molecular chain terminal by silanol and at the other terminal by trialkylsiloxy; an alkoxy functional silane; an organopolysiloxane resin; a curing catalyst; and a diorganopolysiloxane that contains at least 2 carboxyl groups. The room-temperature-curable silicone elastomer composition has an excellent pre-cure workability and cures into a low-modulus, high-elongation silicone elastomer.
    Type: Grant
    Filed: January 30, 1997
    Date of Patent: January 6, 1998
    Assignee: Dow Corning Toray Silicone Co., LTD.
    Inventors: Hidekatsu Hatanaka, Seiji Hori
  • Patent number: 5684113
    Abstract: A curable organopolysiloxane composition that maintains flowability under moisture-free and light blocking conditions, more rapidly forms a nonflowable adhesive when irradiated with high energy beams such as ultraviolet rays and electron beams, and forms an elastic body by further curing when exposed to atmospheric moisture. It also involves a method for adhering a substrate to an adherend using the composition. The curable organosiloxane composition has a viscosity of 3,000 Pa.s or less and is made up of a silicone resin containing no alkenyl groups, a polydiorganosiloxane having terminal units containing a mercapto group, an alkenyl-containing organopolysiloxane, and a condensation-reaction-promoting catalyst. An assembly which has a substrates adhered to an adherend is made by spreading the composition on the substrate, irradiating it with a high energy beam, contacting the irradiated surface with an adherend, and letting it stand in air, so that the substrate is adhered to the adherend.
    Type: Grant
    Filed: November 12, 1996
    Date of Patent: November 4, 1997
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Junji Nakanishi, Makoto Yoshitake
  • Patent number: 5681914
    Abstract: A curable silicone composition that cures at room temperature into a highly water-repellent, highly oil-repellent film is obtained from a composition of (A) an organopolysiloxane resin with the following average unit formulaR.sub.a (ZO).sub.b SiO.sub.(4-a-b)/2in which R represents substituted and unsubstituted monovalent hydrocarbon groups, Z is a hydrogen atom or C.sub.1 to C.sub.6 alkyl group, i has a value from 0.80 to 1.80, and b has a value that gives a content of 0.01 to 10 weight % silicon-bonded hydroxyl or alkoxy in the instant compound; (B) an organopolysiloxane each molecule of which contains at least one silylalkylene group with the following general formula bonded to main-chain silicon--R.sup.1 --SiR.sup.2.sub.(3-m) X.sub.mwherein R.sup.1 represents alkylene and alkyleneoxyalkylene groups; each R.sup.
    Type: Grant
    Filed: May 23, 1996
    Date of Patent: October 28, 1997
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Hideki Kobayashi, Toru Masatomi
  • Patent number: 5679725
    Abstract: A process of making a polydiorganosiloxane-silica foundation mixture from a free-flowing, powdered, surface-modified, reinforcing silica-polydiorganosiloxane concentrate used to make, for example, RTV silicone sealant compositions which have non-sag properties. The foundation mixtures are made by combining, mixing, and heating a reinforcing silica filler and a surface modifying agent to a temperature of >90.degree. C. to <180.degree. C. using 0.1 to 0.5 parts by weight of the surface modifying agent per one part by weight of the silica. Polydiorganosiloxane is added gradually to the resulting fluidized filler over a time period of less than 10 minutes to obtain the free flowing powdered reinforcing silica-polydiorganosiloxane concentrate. The foundation mixture is obtained by massing the concentrate and adding more polydiorganosiloxane to obtain a mixture which has from 8 to 20 weight percent silica filler.
    Type: Grant
    Filed: November 29, 1995
    Date of Patent: October 21, 1997
    Assignee: Dow Corning Corporation
    Inventor: Mark David Fisher
  • Patent number: 5679726
    Abstract: A process of making a polydiorganosiloxane-silica foundation mixture from a free-flowing, powdered, surface-modified, reinforcing silica-polydiorganosiloxane concentrate used to make, for example, RTV silicone sealant compositions which have non-sag properties. The foundation mixtures are made by combining, mixing, and heating a reinforcing silica filler and a diol surface modifying agent to a temperature of 20.degree. C. to <180.degree. C. using 0.05 to 0.5 parts by weight of the diol per one part by weight of the silica. Polydiorganosiloxane is added gradually to the resulting fluidized filler over a time period of less than 10 minutes to obtain the free flowing powdered reinforcing silica-polydiorganosiloxane concentrate. The foundation mixture is obtained by massing the concentrate and adding more polydiorganosiloxane to obtain a mixture which has from 5 to 20 weight percent silica filler. The foundation mixtures have a plateau stress of >700 dynes/cm.sup.
    Type: Grant
    Filed: November 29, 1995
    Date of Patent: October 21, 1997
    Assignee: Dow Corning Corporation
    Inventors: Beth Irene Gutek, Loren Dale Lower, Sherwood Spells
  • Patent number: 5670560
    Abstract: A process of making a pumpable, stable, polydiorganosiloxane-silica foundation mixture by mixing and heating a polydiorganosiloxane, a reinforcing silica filler, and a diol surface modifying agent at >50.degree. C. to <180.degree. C. using 0.05 to 0.5 parts by weight of the diol per one part by weight of the silica. The foundation mixture can be used to make RTV silicone sealant compositions which are non-sag.
    Type: Grant
    Filed: November 29, 1995
    Date of Patent: September 23, 1997
    Assignee: Dow Corning Corporation
    Inventors: Loren Dale Lower, Sherwood Spells
  • Patent number: 5665805
    Abstract: A room temperature curing silicone elastomer composition with superior workability before curing which forms a silicone elastomer of a low modulus and high elongation after curing. A room temperature curing silicone elastomer composition prepared from a diorganopolysiloxane having both terminals of the molecular chains blocked by silanol groups, a diorganopolysiloxane having one terminal of the molecular chain blocked by a silanol group and the other terminal blocked by a trialkylsiloxy group, (B) an organosilane, (C) an organopolysiloxane resin, (D) a curing catalyst and (E) a higher fatty acid.
    Type: Grant
    Filed: November 8, 1996
    Date of Patent: September 9, 1997
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Hidekatsu Hatanaka, Seiji Hori