Two Or More Si Atoms And At Least One Si-c Or Si-h Group Patents (Class 524/267)
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Patent number: 6020409Abstract: Polyorganosiloxane gels are prepared using compositions curable by a platinum catalyzed hydrosilation reaction that are characterized by the presence of a non-functional silicone fluid. The gel may contain additional components and may also be formulated into a multi-part system.Type: GrantFiled: September 19, 1997Date of Patent: February 1, 2000Assignee: Dow Corning CorporationInventors: Khristopher Edward Alvarez, Roger Allen Frazer, Myron Timothy Maxson, Ann Walstrom Norris, Michael Raymond Strong, Beth Ann Witucki, Shizhong Zhang
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Patent number: 6017587Abstract: The present invention relates to electrically conductive silicone compositions comprising an organopolysiloxane containing at least two alkenyl groups per molecule, an organohydrogenpolysiloxane having at least two silicon-bonded hydrogen atoms per molecule, a platinum group metal containing catalyst, a conductive metal particulate, a precrosslinked elastomeric silicone particle, and a non-reactive volatile diluent. The electrically conductive silicone compositions of this invention are useful as electrically conductive adhesives and coatings for electrical and electronic devices. The cured electrically conductive silicone compositions of this invention have high electroconductivity and rubbery elasticity.Type: GrantFiled: July 9, 1998Date of Patent: January 25, 2000Assignees: Dow Corning Corporation, Dow Corning Toray Silicone Co., Ltd.Inventors: Don Lee Kleyer, Michael Andrew Lutz, Katsutoshi Mine, Osamu Mitani, Kazumi Nakayoshi, Bernard Vanwert
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Patent number: 6015850Abstract: Disclosed herein are a rubber composition comprising a diene rubber and silica, wherein (i) the silica is compounded in a proportion of 10-150 parts by weight per 100 parts by weight of the diene rubber, and (ii) a silicone oil having a polar group at its side chain or terminal is compounded in a proportion of 0.1-50 parts by weight per 100 parts by weight of the silica, and has excellent rebound resilience, tensile property, abrasion property and processability, and a preparation process thereof.Type: GrantFiled: September 17, 1997Date of Patent: January 18, 2000Assignee: Nippon Zeon Co., Ltd.Inventors: Masao Nakamura, Yukio Takagishi
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Patent number: 6005036Abstract: A composition containing an organic material subject to oxidative, thermal or actinic degradation can be stabilized by an effective amount of at least one polysilane compound of formula I ##STR1## Preferred compounds are where q is zero, p is 2 to 50, m is zero, R.sub.1 is alkyl, phenyl or benzyl, and A and B are independently hydrogen or a group --Si(E).sub.3 where E is alkyl. These compounds can also be copolymeric having a random, alternate or block distribution of individual structural units. These compounds are particularly suitable as process stabilizers.Type: GrantFiled: December 22, 1997Date of Patent: December 21, 1999Assignee: Ciba Specialty Chemical CorporationInventors: Primo Carrozza, Valerio Borzatta, Chryssostomos Chatgilialoglu
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Patent number: 5994436Abstract: A ductile, gamma radiation resistant olefin polymer composition, including (a) an olefin in polymer, (b) an amount of N,N-dialkylhydroxylamine which is effective to increase the ductility of the composition, and (c) a polysiloxane which contains sterically hindered piperidino groups and which is present in an amount effective to increase the gamma radiation resistance of the composition. The composition may be used to manufacture sterilizable articles including food packaging and medical articles.Type: GrantFiled: December 18, 1997Date of Patent: November 30, 1999Assignee: Montell North America Inc.Inventor: Teresa A. Pierson
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Patent number: 5990212Abstract: The aqueous compositions for rendering absorbent materials oil-repellent and water-repellent consist essentially of(A) an organosilicon compound,(A1) a C.sub.1 -C.sub.20 -alkyl-C.sub.1 -C.sub.6 -alkoxysilane,(A2) an organopolysiloxane containing C.sub.1 -C.sub.6 -alkoxy groups and optionally groups selected from hydroxyl groups and C.sub.1 -C.sub.30 hydrocarbon groups which optionally contain basic nitrogen, or mixtures of (A1) and (A2),(B) an organofluorine compound consisting of fluorine and carbon atoms and optionally chlorine, hydrogen, oxygen sulfur, silicon, phosphorus and/ or nitrogen atoms, and containing CF bonds,(C) a surfactant and(D) water.Type: GrantFiled: July 7, 1997Date of Patent: November 23, 1999Assignee: Wacker-Chemie GmbHInventors: Rudolf Hager, Elke Eberharter
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Patent number: 5985371Abstract: The invention provides a primer composition comprising (I) an organoalkoxysilane or siloxane, (II) an organohydrogensiloxane having an SiH group and an alkoxysilyl group, and (III) an organic titanate. Also provided is a primer composition comprising (A) an alkenyl-containing organopolysiloxane, (B) an organopolysiloxane, (C) an organoalkoxysilane or siloxane, (D) an organohydrogensiloxane having an SiH group and an alkoxysilyl group, (E) a platinum catalyst, (F) an organic titanate, and (G) an organic peroxide. The primer compositions have sufficient adhesion to join thermoset silicone rubber to various substrates.Type: GrantFiled: December 4, 1997Date of Patent: November 16, 1999Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Kazutoshi Fujioka, Takashi Kondou
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Patent number: 5985954Abstract: An epoxy resin composition for sealing a photo-semiconductor element, comprising(A) an epoxy resin,(B) a curing agent and(C) a polyether-modified silicone oil which is represented by the following general formula (1) ##STR1## wherein m, n and a are each independently a number of 1 or more, b is 0 or a positive number, and R is an alkyl group of 1 to 6 carbon atoms or H,and has a weight average molecular weight of 1,000 to 100,000, a silicone unit content {[(m+n+2)/(m+n+2+a+b+1)].times.100} of 10 to 60% and a polyether unit content {[(a+b+1)/(m+n+2+a+b+1)].times.100} of 40 to 90%and a photo-semiconductor device produced by sealing a photo-semiconductor element with the epoxy resin composition.Type: GrantFiled: December 2, 1997Date of Patent: November 16, 1999Assignee: Htiachi Chemical Company, Ltd.Inventors: Satoru Tsuchida, Masahiko Osaka
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Patent number: 5977226Abstract: A vacuum dispensable silicone composition comprising (A) a polydiorganosiloxane containing an average of at least two silicon-bonded alkenyl groups per molecule; (B) an organopolysiloxane resin consisting essentially of (a) R.sup.3.sub.2 (CH.sub.2 .dbd.CH)SiO.sub.1/2 siloxane units, (b) R.sup.3.sub.3 SiO.sub.1/2 siloxane units, and (c) SiO.sub.4/2 siloxane units wherein each R.sup.3 is independently selected from the group consisting of monovalent hydrocarbon and monovalent halogenated hydrocarbon groups free of aliphatic unsaturation, the mole ratio of the combination of (a) and (b) units to (c) units is from 0.6 to 1.Type: GrantFiled: May 4, 1998Date of Patent: November 2, 1999Assignee: Dow Corning CorporationInventors: Stanton James Dent, Edward Joseph Benson, Ann Walstrom Norris, Yeong Joo Lee
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Patent number: 5973044Abstract: This invention relates to organosilicon compositions useful as adhesion promoters for curable organopolysiloxanes, said organosilicon compositions being formed by reacting (A) a polyhydric alcohol, (B) an organosiloxane containing at least one organofunctional group and one hydroxyl or hydrolyzable group per molecule and (C) a silane containing at least three hydrolyzable groups per molecule.Type: GrantFiled: August 28, 1998Date of Patent: October 26, 1999Assignee: Dow Corning CorporationInventors: Michael Andrew Lutz, Michael James Owen, Susan Victoria Perz
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Patent number: 5969045Abstract: The present invention relates to thermoplastic polymer compounds comprising a blend of a chlorinated polyvinyl chloride and an impact modifier containing a polyorganosiloxane and polyalkyl(meth)acrylate. The novel thermoplastic compound has improved stability and toughness and exhibits a low rate of heat release.Type: GrantFiled: May 20, 1997Date of Patent: October 19, 1999Assignee: The B.F. Goodrich CompanyInventors: Theodore Joseph Schmitz, David Lee Milenius, Thomas Henry Forsyth, Arthur Leonard Backman, Girish Trikamlal Dalal
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Patent number: 5962563Abstract: The surface free energy of a polymer blend where a base polymer contains an additive having a different surface free energy than that of the base polymer can be controlled over a wide range of additive surface concentrations by appropriate choice of the mold surface free energy during fabrication. A high surface concentration of additive relative to a low bulk concentration can be achieved, leading to improved biocompatibility without loss of optical clarity.Type: GrantFiled: November 12, 1996Date of Patent: October 5, 1999Assignee: COBE Cardiovascular Operating Co., Inc.Inventors: Lloyd Forrestal, Marc Voorhees
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Patent number: 5959004Abstract: White-pigmented polymers (particularly polyolefins such as polyethylene) containing white pigments treated with at least one silane or a mixture of at least one silane and at least one polysiloxane are disclosed to improve processibility in compounding and improve performance properties such as lacing resistance in a polymeric matrix.Type: GrantFiled: March 3, 1997Date of Patent: September 28, 1999Assignee: E. I. du Pont de Nemours and CompanyInventors: Patricia Ann Tooley, Dwight Alan Holtzen, Joseph Anthony Musiano
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Patent number: 5948842Abstract: The present invention provides a rubber composition comprising natural rubber and/or diene synthetic rubbers, silica in an amount of 10 to 85 parts by weight per 100 parts by weight of the rubber, a specific silane coupling agent, i.e., a bis-(alkoxysilylalkyl) polysulfide having a polysulfide structure in which the distribution of sulfur is specified, in an amount of 1 to 20% by weight of the amount of silica, and provides a pneumatic tire manufactured by using the rubber composition. The pneumatic tire has excellent low heat buildup property, low rolling resistance, and reinforcing property.Type: GrantFiled: August 25, 1997Date of Patent: September 7, 1999Assignee: Bridgestone CorporationInventors: Shunji Araki, Kazuhiro Yanagisawa
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Patent number: 5948832Abstract: Provided are a resin composition improved in utilization of active compound by controlling the bleeding of the active compound low in vaporizability and a molded product obtained from the resin composition. The resin composition comprises 100 parts by weight of a resin, 0.01-200 parts by weight of an active compound and 0.1-100 parts by weight of a vaporizable plasticizer having a vapor pressure of 0.001 mmHg or higher at 20.degree. C., and the vapor pressure (P1) of the vaporizable plasticizer at 20.degree. C. and the vapor pressure (P2) of the active compound at 20.degree. C. satisfy the formula: P1/P2.gtoreq.2.Type: GrantFiled: July 9, 1996Date of Patent: September 7, 1999Assignee: Sumitomo Chemical Company, LimitedInventors: Tatsuhiro Nagamatsu, Hiroki Nakata, Takanori Kume, Tadashi Sakurai
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Patent number: 5936027Abstract: A jet ink composition for use with textiles which comprises a pigment dispersed with an ethyl cellulose resin, a silicone resin, a phenolic resin, and at least one non-aqueous solvent in which the pigment dispersion, silicone resin, and phenolic resin are dissolved. The printed images formed therefrom are readable even when applied to darkly-dyed textiles.Type: GrantFiled: December 19, 1995Date of Patent: August 10, 1999Assignee: Videojet Systems International, Inc.Inventors: Peter Zahrobsky, Bruce Lent
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Patent number: 5910525Abstract: A silicone rubber composition that cures into a highly flame-retardant silicone rubber with excellent electrical insulation characteristics and that does so without sacrificing mechanical strength. The silicone rubber composition comprises:(A) polyorganosiloxane described by average formula R.sub.a SiO.sub.(4-a)/, where R denotes substituted and unsubstituted monovalent hydrocarbon groups and a is a number from 1.95 to 2.05 and having at least 2 silicon-bonded alkenyl groups in each molecule;(B) microparticulate silica;(C) the reaction mixture of(a) a platinum compound and(b) a compound containing a carbon-carbon double bond and a carbon-carbon triple bond;(D) curing agent, and optionally(E) a triazole compound.Type: GrantFiled: July 17, 1997Date of Patent: June 8, 1999Assignee: Dow Corning Toray Silicone Co., Ltd.Inventors: Takao Matsushita, Osamu Takuman
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Patent number: 5902845Abstract: A rubber-modified styrenic resin composition comprising 100 parts by weight of a rubber-modified styrenic resin (A) having 10 to 40% by weight of the content of a soft component particle and a mean particle diameter of the said particle of 0.1 to 1.2 .mu.m, and 1 to 30 parts by weight of fine particles having a mean particle diameter of 0.1 to 5 .mu.m and not having a glass transition temperature between -130 to 90.degree. C.A rubber-modified styrenic resin composition having superior plane impact strength, rigidity and gloss, and its molded article are provided.Type: GrantFiled: March 1, 1996Date of Patent: May 11, 1999Assignee: Sumitomo Chemical Company, LimitedInventors: Shuji Yoshimi, Hayato Kihara, Takahiro Ishii
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Patent number: 5895713Abstract: A method for treating an outdoor article, wherein a surface treating agent comprising a medium (B) containing a tetraalkoxysilane or a silane compound having a silanol group obtained by hydrolyzing an oligomer of such a tetraalkoxy silane (A), wherein the content of (A) is from 0.01 to 100 parts by weight per 100 parts by weight of (B), is used, and a thin film is formed by treating a hydrophobic synthetic resin coating film surface of the outdoor article with such a surface treating agent. It is thereby possible to prevent formation of a streak soils which are likely to form at a portion where rain water collects and runs down, such as below a window frame of a building.Type: GrantFiled: March 13, 1995Date of Patent: April 20, 1999Assignee: Asahi Glass Company Ltd.Inventors: Nobuyuki Miyazaki, Shun-ichi Kodama, Takashi Takayanagi, Bunji Uchino
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Patent number: 5889081Abstract: This invention provides: (1) a hinder composition for friction materials, characterized in that it comprises a thermosetting resin and a specific organic silicon compound having phenyl groups, and (2) a friction material having as a binder composition shown in the above item (1). When used for manufacturing friction materials in the brakes and clutches for various kinds of vehicles such as automobiles, it can remarkably improve the facing and abrasion resistances of the friction material.Type: GrantFiled: January 17, 1996Date of Patent: March 30, 1999Assignee: Osaka Gas Company LimitedInventors: Hiroya Kakegawa, Tokugen Yasuda, Xiangsheng Wang
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Patent number: 5889090Abstract: White-pigmented polymers (particularly, polyolefins such as polyethylene) containing white pigments treated with at least one silane or a mixture of at least one silane and at least one polysiloxane are disclosed to improve processibility in compounding and improve performance properties such as lacing resistance in a polymeric matrix.Type: GrantFiled: May 15, 1997Date of Patent: March 30, 1999Assignee: E. I. duPont deNemours & CompanyInventors: Patricia Ann Tooley, Dwight Alan Holtzen, Joseph Anthony Musiano
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Patent number: 5889086Abstract: A water repellent for automobile window glass includes dimethyl polyorganosiloxane, an inorganic acid, a water-type solvent, and at least one member selected from the group consisting of alkyl group-containing polyorganosiloxanes each having a specific structure, fluorine resins each having a specific structure, and paraffin waxes.Type: GrantFiled: June 23, 1997Date of Patent: March 30, 1999Assignee: Taiho Industries Co., Ltd.Inventors: Takashi Ushijima, Seigo Shinohara
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Patent number: 5872164Abstract: A process is provided for preparing a resin composition for coloring which comprises the steps of a phase replacement and dehydration of a pigment (a); water (b); a thermoplastic resin (c), an aqueous dispersion or solution of a thermoplastic resin (d) or an aqueous compound (e) in a twin screw extruder. Also, there is provided a resin composition for coloring prepared by such a process. It is possible to efficiently manufacture a resin composition for coloring (master batch) which has excellent pigment dispersibility and which is capable of uniform coloring without causing color unevenness.Type: GrantFiled: September 19, 1997Date of Patent: February 16, 1999Assignee: Toyo Ink Manufacturing Co., Ltd.Inventors: Masashi Koide, Yasuaki Machida, Junichi Suzuki
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Patent number: 5863966Abstract: Radiation-curing printing inks which comprise organopolysiloxanes of the general formula ##STR1## in which R.sup.1 =an alkyl radical having 1 to 8 carbon atoms,R.sup.2 =a group of the formula--CH.sub.2 --CH.sub.2 --C(O)O--R--(OC(O)--CH.dbd.CH.sub.2).sub.x-1and/or--CH.dbd.CH--C(O)O--R--(OC(O)--CH.dbd.CH.sub.2).sub.x-1in which x is an integer and is at least 2, and R is a hydrocarbon radical which optionally has alkoxy groups,R.sup.3 =R.sup.1 or R.sup.2,n=30 to 150,m=0 to 3, preferably 0,in quantities of from 0.01 to 3% by weight, based on the ink formulation.Type: GrantFiled: September 6, 1996Date of Patent: January 26, 1999Assignee: Th. Goldschmidt AGInventors: Thomas Ebbrecht, Georg Feldmann-Krane, Peter Lersch, Stefan Silber
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Patent number: 5861448Abstract: A platinum curing organosiloxane composition having improved hysteresis characteristics when cured. The composition requires the presence of a diorganovinylsiloxy terminated polydiorganosiloxane having a viscosity within a range of about 20 Pa.multidot.s to 200 Pa.multidot.s at 25.degree. C. and containing essentially no ethylenically unsaturated hydrocarbon radicals bonded to non-terminal silicon atoms and a diorganovinylsiloxy terminated polydiorganosiloxane having a viscosity within a range of about 0.1 Pa.multidot.s to 200 Pa.multidot.s at 25.degree. C., where from 1 to 5 percent of the non-terminal repeating units of the siloxane comprise a vinyl radical. In addition, the present composition comprises 10 to 30 weight percent of a reinforcing silica filler that has been treated with hexamethyldisilazane and 1,1,3,3-tetramethyl-1,3-divinyldisilazane, and an organohydrogensiloxane resin crosslinker comprising greater than 5 silicon-bonded hydrogen atoms per molecule.Type: GrantFiled: January 31, 1997Date of Patent: January 19, 1999Assignee: Dow Corning CorporationInventors: Phillip Joseph Griffith, Chu Yat Ho, Diane Marie Kosal
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Patent number: 5859094Abstract: A platinum group-metal curing liquid silicone rubber compositions having improved physical properties such as tear and heat-aging, especially at durometers below about 35 and above about 65. The present inventors have unexpectedly discovered that the addition of diorganohydrogensiloxy end-blocked polydiorganosiloxanes and triorganosiloxy end-blocked polydiorganosiloxanes having a viscosity greater than about 10 Pa.cndot.s at 25.degree. C. to liquid silicone rubber compositions can provide for the described improved properties.Type: GrantFiled: September 3, 1996Date of Patent: January 12, 1999Assignee: Dow Corning CorporationInventors: Lori Jean Conway, Phillip Joseph Griffith, Jary David Jensen, Peter Lamont
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Patent number: 5854336Abstract: A process is provided for preparing a silicone elastomer composition for cosmetic products which includes the steps of feeding the silicone elastomer composition comprising a silicone rubber in a carrier fluid into a reactor, mixing the composition in the reactor, delivering the composition from the reactor into a high pressure pump, pumping the fluid into a device for reducing particles of rubber into smaller sizes and recirculating the resultant size reduced particles back to the reactor. The device for reducing particle size is preferably a high pressure fed homogenizer, most advantageously a sonolator.Type: GrantFiled: March 20, 1997Date of Patent: December 29, 1998Assignee: Chesebrough-Pond's USA Co., Division of Conopco, Inc.Inventors: Peter Anthony Divone, Sr., Brian John Dobkowski, Michael Charles Cheney, Salvador Pliego, Walter Anthony Biercevicz, Kenneth Paul Manzari
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Patent number: 5854308Abstract: Water-based pigmented ink formulations are disclosed including a water soluble or water dispersible silicone-containing polymer additive comprising a vinyl silicone polymer. The additive significantly reduces kogation, mudcracking, and banding in some or all of the pigmented ink formulations.Type: GrantFiled: February 29, 1996Date of Patent: December 29, 1998Assignee: Minnesota Mining And Manufacturing CompanyInventors: Richard J. Kuo, Smarajit Mitra, Charles E. Boyer, III, Daniel B. Pendergrass, Jr.
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Patent number: 5844051Abstract: The invention relates to a coating composition intended to be applied to a surface of a high-molecular-weight elastic body. The coating composition includes 100 parts by weight of a mixture of a polyisocyanate and a compound containing therein at least two active hydrogen atoms which are capable of reacting with the polyisocyanate to prepare a polyurethane, and 0.5-100 parts by weight of a diorganopolysiloxane having an average degree of polymerization from 6,000 to 10,000. The coating composition provides a coating film which is superior in durability. Furthermore, this coating film does not generate an uncomfortable noise even when a glass plate wet with water slides on the coating film.Type: GrantFiled: April 25, 1996Date of Patent: December 1, 1998Assignee: Kinugawa Rubber Ind. Co., Ltd.Inventors: Tetsuo Onzuka, Yoshihiro Itoh
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Patent number: 5844031Abstract: A method of dispersing silicone compositions in organic thermoplastic materials is disclosed. The novel compositions produced by the method of the invention have a fine and relatively uniform dispersion or organosilicone in an organic thermoplastic. An organosilicone resin (A) and a predominantly linear silicone fluid (B) are first blended to substantial homogeneity to form an organosilicone alloy therefrom. The organosilicone alloy exhibits thermoplastic behavior and has a temperature-dependent complex viscosity .eta.*.sub.Si (T) associated therewith. Likewise the organic thermoplastic materials have a temperature-dependent complex viscosity, .eta.*.sub.OTP (T), associated therewith. The organic thermoplastic and the organosilicone alloy are thereafter mixed at a predetermined mixing temperature, T.sub.m, and a predetermined shear strain rate. The organic thermoplastic material and the organosilicone alloy are both in a flowable state at T.sub.m. The value of T.sub.m is selected to be about .+-.30.degree. C.Type: GrantFiled: August 28, 1996Date of Patent: December 1, 1998Assignee: Dow Corning CorporationInventors: Wei Chen, Hongxi Zhang, Kevin Edward Lupton, David Joseph Romenesko, Randall Gene Schmidt
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Patent number: 5844038Abstract: 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: GrantFiled: January 27, 1997Date of Patent: December 1, 1998Assignee: Dow Corning S. A.Inventors: Dominique Culot, Patrick Deglasse, Sesto Di Marco, Jean Iker
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Patent number: 5811473Abstract: A primer activator composition useful in cleaning and activating metallic surfaces in preparation for use with an anaerobic adhesive. The composition contains a non-combustible, non-ozone depleting, liquid polyfluoroalkane having at least one carbon-hydrogen bond, preferably a C.sub.4-10 dihydro- or trihydro-polyfluoroalkane; an alkanol which is capable of forming an azeotropic mixture with the polyfluoroalkane, preferably a C.sub.1-6 alkanol, such as n-butanol; a transition metal compound, preferably a copper compound; and optionally, an amine co-activator.Type: GrantFiled: April 2, 1996Date of Patent: September 22, 1998Assignee: Loctite CorporationInventors: Jennifer M. Ramos, Richard D. Rich
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Patent number: 5807914Abstract: The present invention relates to a glass fiber-reinforced polycarbonate resin composition comprising:(A) 70 to 92% by weight of an aromatic polycarbonate resin;(B) 1 to 20% by weight of an aromatic polycarbonate oligomer;(C) 3 to 20% by weight of a glass fiber comprising a short glass fiber having a fiber length of not more than 140 .mu.m and a long glass fiber having a fiber length of more than 140 .mu.m; and(D) 0.5 to 15% by weight of a composite rubber-based graft copolymer,halogen content in said resin composition being not more than 0.5% by weight based on total weight of said resin composition.Type: GrantFiled: March 27, 1997Date of Patent: September 15, 1998Assignee: Mitsubishi Engineering-Plastics CorporationInventors: Naoto Obayashi, Tooru Watanabe, Hiroyoshi Maruyama
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Patent number: 5804633Abstract: Permanent aqueous marker inks are provided which include surfactant, a pigment, a film-forming polymer, and water. The surfactant may be a combination of a hydrocarbon, preferably an alkylphenol ethyoxylate and a fluorocarbon, or it may be a silicone.Type: GrantFiled: June 5, 1995Date of Patent: September 8, 1998Assignee: The Gillette CompanyInventors: Rachel M. Loftin, Kimberly Borelli Sanborn
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Patent number: 5804620Abstract: An embrittlement-resistant polymer composition, including: (a) a visbroken polymer composition comprising a crystalline, random copolymer of propylene and either ethylene or C.sub.4 -C.sub.10 1-olefins, and (b) an amount of polymethyl propyl 3-oxy-?4-(2,2,6,6-tetramethyl)piperidinyl! siloxane which is effective to improve the radiation resistance of the composition. Optional components include an acid neutralizing agent, and a sorbitol-based clarifier compound. The composition may be used to manufacture medical articles and food packaging material which must be sterilized, either by irradiation or by autoclaving.Type: GrantFiled: June 18, 1996Date of Patent: September 8, 1998Assignee: Montell North America Inc.Inventor: Stephen E. Amos
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Patent number: 5801214Abstract: A composition for retaining dentures in the mouth of a denture wearer including 5-8% w/w of an hydrophilic gelling agent, 2-7% w/w of a thickening agent, 5-20% w/w of ail agent that imparts water resistance to the composition, 0.2-5% w/w of humectant(s) and the balance being water, the composition being formable into a viscous hydrophobic film in use. A method of retaining dentures in the mouth of a denture wearer by applying to the denture or the mouth tissue the composition and placing the denture into position in the mouth in a manner such that the composition substantially forms a seal between the mouth tissue and the denture to thereby assist in the retention of the denture.Type: GrantFiled: June 14, 1996Date of Patent: September 1, 1998Assignee: Confi-Dent Pty LimitedInventors: John Alexander Staton, Luke Thomas
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Patent number: 5780538Abstract: The present invention relates to a silica reinforced rubber composition and to pneumatic tires having treads comprised of the silica reinforced rubber compositions.The silica reinforced rubber composition comprises at least one elastomer, silica, a silica coupler, a hydrophobating agent and, optionally, carbon black.Type: GrantFiled: March 11, 1996Date of Patent: July 14, 1998Assignee: The GoodYear Tire & Rubber CompanyInventors: Martin Paul Cohen, Raymond Benjamin Roennau, Cheryl Ann Losey
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Patent number: 5760116Abstract: A composition comprising the hydrosilylation addition product of a linear alkenyl functionalized polyorganosiloxane and an M.sup.H Q resin and a low molecular weight silicone when subjected to shearing provides for components in personal care formulations that have improved spreadability and substance.Type: GrantFiled: September 5, 1996Date of Patent: June 2, 1998Assignee: General Electric CompanyInventors: John A. Kilgour, Virginia Van Valkenburgh Powell
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Patent number: 5753370Abstract: An artificial snowseed in the form of granules of a super water-absorbing polymer already coated with a fluorine-containing material and/or a silicone oil. The granules can retain the original spherical form after absorption of water without sticking to each other. Further the present invention provides a method for making artificial snow comprising freezing the above artificial snowseed after absorption of water.Type: GrantFiled: February 26, 1996Date of Patent: May 19, 1998Assignees: Osaka Organic Chemical Industry Co., Ltd., Snova Corp.Inventors: Taiji Kambayashi, Hideyuki Mekata, Hiroaki Umezu, Hiroshi Matsunaga
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Patent number: 5753735Abstract: A composition comprising a particulate dispersion of from 50% to 98.9% by weight of a siloxane-polyoxyalkylene copolymer surfactant, from 1% to 49.9% by weight of a nonionic organic surfactant other than the siloxane-polyoxyalkylene copolymer surfactant and from 0.1% to 25% by weight, based on the total weight of the composition, of a particulate material having a particle size of less than 20 microns, is described. A method of preparing such a composition, and polyurethane and polyisocyanurate foams containing such a composition are also described. The nonionic organic surfactant is preferably an ethoxylated nonylphenol. The particulate material is preferably a hydrophobic precipitated silica. The composition of the invention is useful as an additive in the preparation of rigid polyurethane and polyisocyanurate foams.Type: GrantFiled: June 16, 1997Date of Patent: May 19, 1998Assignee: BASF CorporationInventors: Michael O. Okoroafor, William H. McDonald, Alan E. Wang
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Patent number: 5753734Abstract: What is disclosed is a new composition for forming coating water repellent films with a very smooth water-repellent surface. The composition imparts an attractive appearance to the coating film and assures that less time is needed for water to descent down a substrate.Type: GrantFiled: December 16, 1996Date of Patent: May 19, 1998Assignee: Dow Corning Asia, Ltd.Inventor: Teruhito Maruyama
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Patent number: 5746814Abstract: Disclosed is a curl preventing/minimizing fluid composition containing a hydrophilic solvent, a polymeric binder, a water soluble/dispersible paper desizing agent, a water soluble/dispersible paper anticurl agent, a defoamer, a biocide, an antistatic agent, a lightfastness promoting agent, and a filler.Type: GrantFiled: May 7, 1997Date of Patent: May 5, 1998Assignee: Xerox CorporationInventors: Shadi L. Malhotra, Diane M. Foley
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Patent number: 5733963Abstract: The present invention relates to a rubber composition containing silica reinforcement and to pneumatic tires having treads comprised of such rubber composition.A rubber composition comprises at least one elastomer, silica, carbon black and a silica coupler comprised of 3,3'-tetrathiodipropanol polysulfide mixture.Type: GrantFiled: February 20, 1996Date of Patent: March 31, 1998Assignee: The Goodyear Tire & Rubber CompanyInventors: Paul Harry Sandstrom, Lawson Gibson Wideman
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Patent number: 5733538Abstract: A hemocompatible surface-modifying additive is provided for modifying polyurethane or polyurethane urea substrates. The additive has a polyurethane or polyurethane urea hard block or an alternative block which is miscible with the poly(urethane) or poly(urethane-urea) base polymer, a polysiloxane hydrophobic soft block, an optional hydrophilic spacer and a peptide selected from the group consisting of Arg-Gly-Asp, X-Arg-Gly-Asp, Arg-Gly-Asp-X and X-Arg-Gly-Asp-X', wherein X and X' are amino acids.Type: GrantFiled: June 7, 1995Date of Patent: March 31, 1998Assignee: Thoratec Laboratories, Inc.Inventor: Judy S. Riffle
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Patent number: 5731376Abstract: Filled polymer compositions based on polypropylene block copolymer, particularly medium and medium to high impact grades, and a plate like filler such as talc, have improved visual scratch resistance by the inclusion of a polyorganosiloxane, particularly a polyalkylsiloxane such as polydimethylsiloxane. Silicone oils having viscosities of about 30,000 cSt are especially useful. Further benefits are obtained by the further inclusion of a fatty acid amide and/or by the use of passivated filler, particularly by the inclusion of an epoxy resin.Type: GrantFiled: October 24, 1995Date of Patent: March 24, 1998Assignee: Imperial Chemical Industries PLCInventor: John Russell Grasmeder
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Patent number: 5728765Abstract: The invention is based on the surprising and unexpected finding that the impact performance of a thermoplastic composition containing aromatic polycarbonate resin and glass fibers is improved upon incorporation therewith of a particular silicone rubber powder. The silicone rubber powder, added at a level of about 0.5 to 4 percent, relative to the weight of the composition, is characterized in that it contains a mixture of (a) a polydiorganosiloxane and (b) silica, said glass fibers being of the type which do not, per se, adhere to the polycarbonate matrix in which they are incorporated.Type: GrantFiled: August 10, 1995Date of Patent: March 17, 1998Assignee: Bayer CorporationInventors: James Y. J. Chung, Nelson R. Lazear
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Patent number: 5721301Abstract: A coating solution is made from an ingredient solute comprised of silicone oil and polymethacrylicacidalkyl, a basic solvent selected from a group consisting of turpentine oil, heptane, n-decane, tetrachloroethane, 2-butanone, 1.4 dioxane, ethoxyethanol and toluene, and a buffer solvent selected from a group consisting of methanol, aceticacidalkyl and tetrachloromethane. The buffer solvent is added to a mixture of the ingredient solute and the basic solvent so that both of the silicone oil and the polymethacrylicacidalkyl can be perfectly dissolved to form a uniform and clear solution.Type: GrantFiled: April 19, 1996Date of Patent: February 24, 1998Inventor: Bin Takigawa
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Patent number: 5719220Abstract: A highly filled, curable composition comprising (A) an addition polymerizable organic liquid which on curing forms a solid polymer, (B) 20 to 80% by volume of a finely divided particulate inorganic filler having a weight average particle size of less than 50 microns but not having a BET surface area of more than 30 m.sup.2 .multidot.cm.sup.-3, and (C) 0.05 to 0.5% by weight of a polydimethylsiloxane and molded composite articles produced therefrom are disclosed. Such articles exhibit improved resilience to thermal shock.Type: GrantFiled: October 4, 1996Date of Patent: February 17, 1998Assignee: Imperial Chemical Industries PLCInventor: Neil Kirtley
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Patent number: 5708067Abstract: There is disclosed a heat resistant organopolysiloxane composition comprising:(A) 100 parts by weight of an organopolysiloxane having a viscosity of 100 to 1,000,000 centistokes at 25.degree. C.;(B) 0.001 to 10 parts by weight of a reaction product of an alkali metal silanolate compound with cerium chloride or a cerium carboxylate; and(C) a diorganopolysiloxane having silicon-bonded hydrogen groups only at its molecular chain terminals, component (C) being present in a quantity sufficient to provide 1 to 10,000 parts per million of silicon-bonded hydrogen based on the total weight of said composition.Type: GrantFiled: December 26, 1996Date of Patent: January 13, 1998Assignee: Dow Corning Toray Silicone Co., Ltd.Inventors: Shoji Akamatsu, Haruhiko Furukawa, Toshinori Watanabe
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Patent number: 5708084Abstract: There is disclosed a polyolefin composition which can be extruded at relatively high rates to provide extrudate having improved hydrophobicity, said composition comprising (A) 100 parts by weight of a thermoplastic resin; and (B) at least 1 part by weight of an interactive diorganopolysiloxane process aid, said diorganopolysiloxane having a number average molecular weight of at least 10,000.Type: GrantFiled: August 28, 1996Date of Patent: January 13, 1998Assignee: Dow Corning CorporationInventors: Dale Earl Hauenstein, Caibao Qian, David Joseph Romenesko