Patents Examined by Karen A. Hellender
  • Patent number: 4981888
    Abstract: A pigmented thermoplastic resin composition comprising:(A) a thermoplastic resin;(B) a metal phthalocyanine pigment; and(C) 0.5 to 30% by weight, based on the weight of the pigment (B), as agent imparting heat stability to component (B), of a sulphonated imidomethyl phthalocyanine having the formula I: ##STR1## wherein Pc is a phthalocyanine residue optionally substituted by up to 4 chlorine or bromine atoms;M is hydrogen or a metal capable of forming a metal phthalocyanine;m is a vlaue within the range of from 0.05 to 1.0;n is a value within the range of from 0.1 to 4.0; andX is a residue such that, in combination with the group ##STR2## it form a 5-, 6- or 7-membered cyclic imide.
    Type: Grant
    Filed: May 15, 1989
    Date of Patent: January 1, 1991
    Assignee: Ciba-Geigy Corporation
    Inventors: Robert Langley, Colin D. Campbell
  • Patent number: 4980413
    Abstract: Organopolysiloxane compositions curable by a hydrosilylation reaction contain a novel adhesion promoter consisting essentially of (1) a carboxylic acid ester containing an acryloyloxy or methacryloyloxy group and an alcoholic functional group and (2) an organosilicon compound containing a silicon-bonded vinyloxy or substituted vinyloxy group. The compositions exhibit excellent adhesion to both organic and inorganic substrates that are in contact with the compositions during curing. The adhesion on plastics is especially good.
    Type: Grant
    Filed: January 29, 1990
    Date of Patent: December 25, 1990
    Assignee: Dow Corning Toray Silicone Company, Ltd.
    Inventor: Akira Kasuya
  • Patent number: 4980441
    Abstract: Liquid crystalline bis-chlorocarbonic acid esters are 4-hydroxybenzoic acid-(4'-hydroxyphenyl) esters corresponding to the following formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 denote, independently of one another, hydrogen, a halogen atom or a C.sub.1 to C.sub.6 alkyl group. Preparation of (I) and liquid crystalline N-alkyl polyurethanes and polycarbonates prepared form (I) are other invention embodiments.
    Type: Grant
    Filed: February 27, 1989
    Date of Patent: December 25, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hanns P. Muller, Bernhard Jansen, Wolfgang Calaminus, Rolf Dhein
  • Patent number: 4975490
    Abstract: There is disclosed a novel phtalic acid ester-modified organopolysiloxane having the general formula ##STR1## wherein R.sup.1 is a monovalent hydrocarbon group, R.sup.2 is a group R.sup.1 or a group with the formula ##STR2## with the proviso that at least one of the groups R.sup.2 in each molecule is the group with the formula ##STR3## in which R.sup.3 is an alkyl group, R.sup.4 is an alkylene group, and m is a positive integer.The organosiloxane is useful as a co-reactant in the preparation of organic resins such as polyesters, polyamides and polyimides.
    Type: Grant
    Filed: January 18, 1990
    Date of Patent: December 4, 1990
    Assignee: Toray Silicone Company, Ltd.
    Inventors: Tadashi Okawa, Toshio Suzuki
  • Patent number: 4973643
    Abstract: The invention discloses novel organofunctional silicone polymers which have an ether amino pendant functionality present within the polymer. Compounds of the invention by virtue of their ether amino group, deposit on the surface of substrates, either alone or as complexes with cations. Thereby altering the substrate's surface physical properties. The desirable durable properties which can be given to substrates include; softness, lubrication, soil release, and hydrophoblicity. The compounds of the present invention are prepared by introduction of an amino group onto the silicone pendant group. Aminolysis and cyanoethylation of a hydroxy containing silicone polymer, or hydroxy containing vinyl intermediate which is subsequently introduced into the polymer backbone by hydrosilation are the preferred methods for peparing the compounds of the present invention.
    Type: Grant
    Filed: December 11, 1989
    Date of Patent: November 27, 1990
    Assignee: Siltech Inc.
    Inventor: Anthony J. O'Lenick, Jr.
  • Patent number: 4971132
    Abstract: A binder composition which comprises an aqueous alkaline solution of a phenolic resole resin and an additive wherein the additive is phenoxyethanol or a derivative of phenoxyethanol.
    Type: Grant
    Filed: May 14, 1990
    Date of Patent: November 20, 1990
    Assignee: Acme Resin Corporation
    Inventors: David R. Armbruster, Kwok-Tuen Tse
  • Patent number: 4970283
    Abstract: The present invention intends to provide a cured material of a silicon-containing polyimide having high heat resistance, low coefficient of thermal expansion, no brittleness and high hardness.In order to enable liquid coating and impregnation, a silicon-containing soluble polyimide precursor is first prepared. The precursor may be prepared by mixing five compounds of ##STR1## (R.sup.1 is a tetravalent carbon cyclic aromatic group), NH.sub.2 --R.sup.2 --NH.sub.2 (R.sup.2 is an aliphatic group, an alicyclic group, an aromatic aliphatic group or a carbon cyclic aromatic group, a polysiloxane group or 1,3,5-triazine group having a substituent), NH.sub.2 --R.sup.3 --SiR.sup.4.sub.3-k X.sup.1.sub.k and NH.sub.2 --R.sup.3 --SiR.sub.3-m.sup.4 X.sup.1.sub.m (R.sup.3 is --(CH.sub.2).sub.s --, ##STR2## wherein s is an integer of 1 to 4, and R.sup.4 is an alkyl group, a phenyl group or an alkyl-substituted phenyl group and SiX.sub.4.sup.2, X.sup.1 and X.sup.
    Type: Grant
    Filed: November 10, 1988
    Date of Patent: November 13, 1990
    Assignee: Chisso Corporation
    Inventors: Kouichi Kunimune, Haruo Kato, Yoshiya Kutsuzawa
  • Patent number: 4968727
    Abstract: A primer composition which is particularly effective to strongly bond fluorosilicone rubbers to metal, plastics, fibers, and the like, comprising(A) 100 parts by weight of a polyorganosiloxane represented by formula (I): ##EQU1## wherein R.sup.1 represents a substituted or unsubstituted monovalent hydrocarbon group, 10 to 50 mol % of the hydrocarbon groups of R.sup.1 being perfluoroalkyl and 0.01 to 1.0 mol % of the hydrocarbon groups of R.sup.1 being vinyl, and a is a number of from 1.98 to 2.01, and which has a viscosity as measured at 25.degree. C. of 1,000,000 cSt or more;(B) 5 to 100 parts by weight of a silica filler;(C) 0.5 to 50 parts by weight of a compound represented by formula (II): ##STR1## wherein X represents an organosilicon-containing group or a hydrocarbon-containing group, R represents methyl or hydrogen, and n is an integer of 1 or larger; and(D) an organic solvent.
    Type: Grant
    Filed: January 8, 1990
    Date of Patent: November 6, 1990
    Assignee: Toshiba Silicone Co., Ltd.
    Inventors: Junichiro Watanabe, Makoto Sawada
  • Patent number: 4965333
    Abstract: A room temperature vulcanizable organopolysiloxane composition is provided, comprising (a) a diorganopolysiloxane blocked with a silanol, dialkoxy or trialkoxy radical at both ends of the molecular chain thereof, (b) a novel organic silicon compound of the general formula: ##STR1## wherein R.sup.1 is hydrogen or a monovalent hydrocarbon radical having 1 to 8 carbon atoms, ##STR2## m and l are independently equal to 0, 1 or 2, and n is an integer in the range of 2 to 8, and (c) a curing catalyst. The composition may further contain (d) an organoalkoxysilane.
    Type: Grant
    Filed: December 20, 1988
    Date of Patent: October 23, 1990
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Yoshio Inouye, Takeo Inoue, Koji Yokoo
  • Patent number: 4965307
    Abstract: Polyester films with a good slitting property and good slipping property contain, in first and second embodiments, at least 0.005% by weight of calcium carbonate particles. The particle size S.sub.c of the polyester crystals, crystal face orientation index X.sub.i and the difference .DELTA.n between the refractive indices in the machine direction and in the transverse direction of the polyester film have a specific relationship, or the internal haze H, face orientation coefficient f.sub.n or the difference .DELTA.n between the refractive indices in the machine direction and in the transverse direction have a specific relationship. By satisfying the specific relationship, a good slitting property and good slipping property are obtained. A third embodiment provides a polyester film containing at least 0.005% by weight of calcium carbonate particles, which has a specific center line average roughness Ra, face orientation coefficient f.sub.n, the difference .DELTA.
    Type: Grant
    Filed: December 7, 1988
    Date of Patent: October 23, 1990
    Assignee: Toray Industries, Inc.
    Inventors: Kazuo Okabe, Katsumi Bokuta, Hiroyuki Morimoto
  • Patent number: 4963635
    Abstract: The present invention provides a process for the production of silicon-containing polyimide presursors that have a viscosity most suitable for application, and when baked, can form a coating low in hygroscopicity, heat resistant, and having powerful adhesion, and a process for their cured silicon-containing polyimide.A process for the production of silicon-containing polyimide precursors having a logarithmic viscosity number of 0.05 to 5 dl/g by reacting A.sup.1 mol of fluorine-containing diacid anhydride, A.sup.2 mol of a diacid anhydride, B.sup.1 mol of a fluorine-containing diamine, B.sup.2 mol of a diamine, and C mol of an aminosilane with the mixing ratio of them such that A.sup.1, A.sup.2, B.sup.1, B.sup.2, and C are within ranges having prescribed relationships, and a process for the production of a silicon-containing polyimide by baking a solution of said precursor at 50.degree. to 500.degree. C.
    Type: Grant
    Filed: February 24, 1989
    Date of Patent: October 16, 1990
    Assignee: Chisso Corporation
    Inventors: Kouichi Kunimune, Yoshiya Kutsuzawa
  • Patent number: 4963619
    Abstract: The invention relates to thermoplastic polycarbonate molding compositions containing polycarbonates, special siloxane-containing graft polymers and, optionally, other thermoplasts and/or standard additives and to a process for the production of the polycarbonate molding compositions.
    Type: Grant
    Filed: November 3, 1988
    Date of Patent: October 16, 1990
    Inventors: Dieter Wittmann, Christian Lindner, Volker Damrath, Hans-Jurgen Kress, Horst Peters, Jochen Schoeps
  • Patent number: 4962164
    Abstract: Degradable compositions of polyesters, polyamides, polystyrenes and polyvinyl chlorides containing effective degradable amounts of CO in the composition.
    Type: Grant
    Filed: June 27, 1988
    Date of Patent: October 9, 1990
    Assignee: Owens-Illinois Plastic Products Inc.
    Inventors: Saleh A. Jabarin, Dennis C. Balduff
  • Patent number: 4962174
    Abstract: A method of producing alkoxysilethylene endblocked polydiorganosiloxane consists essentially of first reacting hydroxyl endblocked polydiorganosiloxane with an excess of a SiH compound having from 2 to 4 SiH groups in the presence of a platinum catalyst, then reacting that product with vinyltrialkoxysilane to give the desired polymer.
    Type: Grant
    Filed: January 18, 1990
    Date of Patent: October 9, 1990
    Assignee: Dow Corning Corporation
    Inventors: Carl J. Bilgrien, Daniel T. Berg
  • Patent number: 4962152
    Abstract: The specification describes and claims curable polysiloxane compositions filled with a mixture of two types of finely divided calcium carbonate. The curable polysiloxane comprises 100 parts by weight of a hydroxypolysiloxane with from 5 to 12 parts by weight of a curing agent therefore comprising a silane of the formula R.sub.a R'.sub.b Si or a siloxane having units ##EQU1## wherein each R represents a monovalent hydrocarbon group, each R' represents an hydroxy, alkoxy, or alkoxyalkoxy group, a+b=4, a has a value 0 or 1, b has a value 3 or 4, c has a value 1, 2 or 3 and a+c is not greater than 3 as exemplified by methyl trimethoxy silane, together with a catalytic amount of a titanium or tin compound for promoting curing of the product in presence of moisture of the atmosphere.
    Type: Grant
    Filed: February 9, 1990
    Date of Patent: October 9, 1990
    Assignee: Dow Corning S. A.
    Inventor: Patrick Leempoel
  • Patent number: 4960845
    Abstract: The invention discloses novel sulfated silicone polymers which have the sulfate group on a pendant functionality rather than within the polymer backbone. Compounds of the invention by virtue of the presence of this anionic group, are high foaming compounds which deposit on the surface of substrates. The deposition can be enhanced by forming complexes with cationic surface active agents. These compounds alter the substrate's surface physical properties providing softness and antistatic properties, but do not exhibit defoaming properties which would minimize their applicability to detergent systems.
    Type: Grant
    Filed: November 8, 1989
    Date of Patent: October 2, 1990
    Assignee: Siltech Inc.
    Inventor: Anthony J. O'Lenick, Jr.
  • Patent number: 4954401
    Abstract: A process of curing and cross-linking methylhydrosiloxanes by contacting and forming a mixture of an allyl ester with at least one methylhydrosiloxane in the presence of a Group VIII metal catalyst, and heating the mixture of the allyl ester, the methylhydrosiloxane, and the Group VIII metal catalyst, in the presence of ambient moisture until the methylhydrosiloxane becomes cured and cross-linked.
    Type: Grant
    Filed: August 11, 1989
    Date of Patent: September 4, 1990
    Assignee: Dow Corning Corporation
    Inventor: Anthony Revis
  • Patent number: 4954539
    Abstract: Aqueous silicone emulsions, especially useful for rendering a wide variety of substrates nonadhesive/water-repellent by polycondensation crosslinking, contain (a) an .alpha.,.omega.-dihydroxydiorganopolysiloxane, (b) an organohydropolysiloxane containing at least 3 hydrogen atoms bonded to silicon atoms per molecule, (c) a polyvinyl alcohol, (d) a nonionic emulsifying agent, and (e) a crosslinking catalytically effective amount of a monochelate of pentacoordinated tin of valency IV.
    Type: Grant
    Filed: June 23, 1989
    Date of Patent: September 4, 1990
    Assignee: Rhone-Poulenc Chimie
    Inventors: Jacques Cavezzan, Michel Peignier
  • Patent number: 4954565
    Abstract: A shelf stable aqueous silicone emulsion which yields an elastomer upon removal of the water is produced by combining a hydroxyl endblocked polydiorganosiloxane present as an 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, after crosslinking of the polydiorganosiloxane, can be reinforced with colloidal silica without affecting the shelf life of the reinforced emulsion.
    Type: Grant
    Filed: September 25, 1989
    Date of Patent: September 4, 1990
    Assignee: Dow Corning Corporation
    Inventor: Donald T. Liles
  • Patent number: 4954597
    Abstract: A coating for a paper substrate produced by contacting and forming a mixture of an allyl ester with at least one methylhydrosiloxane in the presence of a Group VIII metal catalyst, coating the mixture on the substrate, and heating the mixture of the allyl ester, the methylhydrosiloxane, the substrate, and the Group VIII metal catalyst, in the presence of ambient moisture until the methylhydrosiloxane becomes cured and cross-linked.
    Type: Grant
    Filed: October 10, 1989
    Date of Patent: September 4, 1990
    Assignee: Dow Corning Corporation
    Inventor: Anthony Revis