Antistatic Compositions Patents (Class 524/910)
  • Patent number: 5346959
    Abstract: An antistatic agent for thermoplastic polymers is provided wherein the antistatic agent is comprised of a functionalized alkylene oxide polymer and optionally a minor amount of an alkali or alkaline earth metal salt capable of complexing with the functionalized alkylene oxide polymer and wherein the thermoplastic polymers include styrenic polymers such as ABS; blends of an ABS copolymer and a styrene-maleic anhydride copolymer; or nylon 6.
    Type: Grant
    Filed: July 21, 1993
    Date of Patent: September 13, 1994
    Assignee: Monsanto Company
    Inventors: Goman (Gomez) Peter M., Kishore Udipi, Lionel R. Stebbins
  • Patent number: 5342889
    Abstract: The present invention relates to electrostatic dissipative polymeric compositions comprising an effective amount of a chain extended polymer and a matrix polymer or matrix polymer blend. The chain extended polymer of the subject invention has electrostatic dissipative properties and is formed from low molecular weight polyethers which are reacted with a chain extender to furnish a useful additive.
    Type: Grant
    Filed: July 10, 1991
    Date of Patent: August 30, 1994
    Assignee: The B. F. Goodrich Company
    Inventors: Francis R. Sullivan, Elaine A. Mertzel, Edmond G. Kolycheck
  • Patent number: 5334636
    Abstract: There is provided a polymer composition comprising,A) a polyphenylene ether resin and,B) optionally a styrene resin and,C) optionally impact strength improving amount of one or more of impact strength improving polymer(s) and,D) from about 5 parts to about 20 parts by weight of at least one mineral filler selected from the group consisting of talc, mica, and wollastonite based on 100 parts by weight of the total of the polymers, A) the polyphenylene ether resin, B) the styrene resin, and C) the impact strength improving polymer and,E) from about 5 parts to about 40 parts by weight of a carbon black based on the total of the polymers, A) the polyphenylene ether resin, B) the styrene resin, and C) the impact strength improving polymer and,F) optionally plasticizing amount of one or more of plasticizer(s),characterized in that the surface resistivity of the composition is lower than about 10.sup.10 ohm.
    Type: Grant
    Filed: March 26, 1992
    Date of Patent: August 2, 1994
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Takeshi Fujii, Manabu Ishikawa
  • Patent number: 5334635
    Abstract: Antistatic thermoplastic styrenic compositions comprising high molecular weight polyethylene oxide and a lithium salt and ethylene glycol, diethylene glycol or triethylene glycol, characterized by their possession of a balance of mechanical properties, gloss and antistatic behavior.
    Type: Grant
    Filed: December 18, 1992
    Date of Patent: August 2, 1994
    Assignee: Monsanto Company
    Inventor: Kishore Udipi
  • Patent number: 5298558
    Abstract: The present invention relates to electrostatic dissipative impact modified polymeric compositions comprising an effective amount of a chain extended block copolymer, polyvinyl halide and no more than 10 weight parts of a polymeric impact modifier per 100 weight parts of polyvinyl chloride. The chain extended block copolymer is formed from reacting a di-functional polyether with a chain extender which is a condensate selected from the group consisting of polyundecanolactam, polydodecanolactam, poly(11-aminoundecanoic acid) and (12-aminododecanoic acid).
    Type: Grant
    Filed: June 2, 1992
    Date of Patent: March 29, 1994
    Assignee: The Geon Company
    Inventors: Francis R. Sullivan, Elaine A. Mertzel, Craig L. Shoemaker
  • Patent number: 5270367
    Abstract: A permanent antistatic resin composition comprising a styrene/lactone block copolymer and an antistatic agent with excellent heat resistance, transparency and permanent antistatic properties is disclosed.
    Type: Grant
    Filed: March 30, 1992
    Date of Patent: December 14, 1993
    Assignee: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Makoto Nakazawa, Tetuji Noda
  • Patent number: 5237009
    Abstract: Disclosed is a composition for dissipating an electrostatic charge in a polymer matrix. The composition includes an oxirane copolymer wherein said copolymer is prepared from ethylene oxide and either a heterocyclic monomer or a vinyl type monomer. The polymer matrix is either a plastic or an elastomer. In a further embodiment, a third constituent of non ESD polymer or non ESD filler is utilized in the composition to further enhance the electrostatic dissipating performance, and optionally also toughness of the composition.
    Type: Grant
    Filed: April 24, 1991
    Date of Patent: August 17, 1993
    Assignee: The B. F. Goodrich Company
    Inventor: Biing-lin Lee
  • Patent number: 5223563
    Abstract: Thermoplastic polymer compositions comprise a polyphenylene ether resin, s styrene resin and a hygroscopic salt in an amount sufficient to provide the compositions with antistatic properties. Preferably, the hygroscopic salt comprises lithium chloride and is included in an amount of from about 0.5 to about 5 parts by weight per hundred parts by weight resins.
    Type: Grant
    Filed: October 20, 1989
    Date of Patent: June 29, 1993
    Assignee: General Electric Company
    Inventor: Robert J. Axelrod
  • Patent number: 5216046
    Abstract: Antistatic polymer blend compositions comprise an ABS graft copolymer, a copolymer of an epihalohydrin and a copolymerizable monomer having an oxirane group, and a surfactant.
    Type: Grant
    Filed: February 27, 1992
    Date of Patent: June 1, 1993
    Assignee: General Electric Company
    Inventor: Stanley J. Kozmiski
  • Patent number: 5198521
    Abstract: A water reaction synthesis with polyoxyethylene diol, diisocyanate and dibutyltin bis lauryl mercaptide produces a high molecular weight thermoplastic polyurethane-urea linear polymer with surface resistivity 10.sup.11 -10.sup.6 ohm/sq. Thermoplastic and/or elastomeric antistatic compositions containing other melt processable polymers and/or filler, and the polymer exhibit permanent protection. Antistatic protection can be increased when the polymer complexes with a metal salt such as lithium chloride, or lithium acetate. The composition is useful in the manufacture of antistatic floor coverings and textile texturing and drafting elements such as cots and aprons.
    Type: Grant
    Filed: October 29, 1991
    Date of Patent: March 30, 1993
    Assignee: Armstrong World Industries, Inc.
    Inventors: Wendell A. Ehrhart, Nowaf Halout, Kenneth K. Ko, David A. Smith
  • Patent number: 5182338
    Abstract: The present invention is directed to the use of an epihalohydrin/ethylene oxide copolymer to impart antistatic properties to polyolefins, such as polypropylene.
    Type: Grant
    Filed: November 22, 1991
    Date of Patent: January 26, 1993
    Assignee: General Electric Company
    Inventor: Satish K. Gaggar
  • Patent number: 5164447
    Abstract: Polymer blend compositions comprises a polyvinyl halide polymer, an antistatic agent and a poly(alkylmethacrylate). Suitable antistatic agents comprise copolymers of epichlorohydrin and ethylene oxide. The poly(alkyl methacrylate) is included in the compositions in an amount effective to enhance the antistatic properties of the compositions.
    Type: Grant
    Filed: April 29, 1991
    Date of Patent: November 17, 1992
    Assignee: General Electric Company
    Inventors: Satish K. Gaggar, Deborah M. Burks, Larry C. Stover
  • Patent number: 5149724
    Abstract: The composition includes a polyglycerol monoester and an ethoxylated sorbitan ester incorporated into polyvinyl chloride or polyolefin thin films. The film composition has enhanced anti-static, anti-fogging and dynamic heat stability properties.
    Type: Grant
    Filed: October 23, 1989
    Date of Patent: September 22, 1992
    Assignee: Lonza Inc.
    Inventors: Timothy E. Fahey, Julia A. Falter
  • Patent number: 5140056
    Abstract: The invention relates to the use of salts of sulfosuccinic acid esters as internal antistatic agents, take-off and winding aids for transparent cast films of polycarbonates, to a process for the production of cast polycarbonate films and to the cast polycarbonate films themselves containing salts of sulfosuccinic acids and also to the use of the new cast polycarbonate films in the electrical field and optical field.
    Type: Grant
    Filed: February 21, 1990
    Date of Patent: August 18, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Volker Wiskamp, Dittmar Nerger, Bernhard Schulte, Werner Waldenrath
  • Patent number: 5100943
    Abstract: A permanent antistatic resin composition which comprises 100 parts by weight of a block copolymer and from 0.1 to 2.0 parts by weight of an antistatic agent, said block copolymer comprising polymer blocks of a vinyl aromatic compound, polymer blocks of a conjugated diene compound and polymer blocks of a lactone compound, wherein the content of the vinyl aromatic compound is from 10 to 100% by weight and the content of the conjugated diene compound is from 0 to 90% by weight, provided that the sum of the vinyl aromatic compound and the conjugated diene compound is from 30 to 99% by weight, and the content of the lactone compound is from 1 to 70% by weight.
    Type: Grant
    Filed: November 28, 1990
    Date of Patent: March 31, 1992
    Assignee: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Makoto Katoh, Tetuji Noda
  • Patent number: 5098939
    Abstract: Diethanolamine and triglyceride are reacted to produce a reaction mixture comprising diethanol amide of monocarboxylic acid and hydroxy-functional glyceride. The reaction mixture is useful as an antistatic composition for formulating with polymers, especially polyolefins.
    Type: Grant
    Filed: March 23, 1990
    Date of Patent: March 24, 1992
    Assignee: PPG Industries, Inc.
    Inventors: Kenneth J. Sienkowski, Paritosh M. Chakrabarti
  • Patent number: 5086106
    Abstract: A methacrylic resin cast plate having an excellent antistatic property comprises (A) 100 weight parts of a polymer comprising 50 to 100 weight % of methyl methacrylate units and 0 to 50 weight % of copolymerizable monomer units and (B) 0.1 to 20 weight parts of a polymer comprising 20 to 100 weight % of units derived from a monomer having a quaternary ammonium base, which is represented by the formula (I): ##STR1## wherein R.sub.1 is H or CH.sub.3, R.sub.2 through R.sub.4 are H or (Cl-9)alkyl which may have a substituent, m is from 1 to 10 and X.sup.- is an anion of a quaternizing agent,and 0 to 80 weight % of copolymerizable monomer units. The cast plate is obtained by polymerizing methyl methacrylate, a monomer mixture comprising at least 50 weight % of methyl methacrylate and up to 50 weight % of a copolymerizable monomer or a partial polymerization product thereof in the presence of the polymer (B).
    Type: Grant
    Filed: October 17, 1989
    Date of Patent: February 4, 1992
    Assignee: Mitsubishi Rayon Company Ltd.
    Inventors: Kiyotaka Azegami, Suehiro Tayama, Naoki Yamamoto, Akira Yanagase, Hiroki Hatakeyama
  • Patent number: 5077330
    Abstract: A water reaction synthesis with polyoxyethylene diol, diisocyanate and dibutyltin bis lauryl mercaptide produces a high molecular weight thermoplastic polyurethane-urea linear polymer with surface resistivity 10.sup.11 -10.sup.6 ohm/sq. Thermoplastic and/or elastomeric antistatic compositions containing other melt processable polymers and/or filler, and the polymer exhibit permanent protection. Antistatic protection can be increased when the polymer complexes with a metal salt such as lithium chloride, or lithium acetate.
    Type: Grant
    Filed: May 4, 1990
    Date of Patent: December 31, 1991
    Assignee: Armstrong World Industries, Inc.
    Inventors: Wendell A. Ehrhart, Nowaf Halout, Kenneth K. Ko, David A. Smith
  • Patent number: 5071899
    Abstract: Disclosed is an anti-stat which is effective in polyvinyl chloride polymeric parts to dissipate charge phenomena occurring at a surface thereof. The anti-stat comprises an ethoxylated fat-forming alcohol and a dibasic acid-capped fat-forming alcohol which is incorporated in an effective amount in the polyvinyl chloride polymeric material.
    Type: Grant
    Filed: February 2, 1990
    Date of Patent: December 10, 1991
    Assignee: Sherex Chemical Company, Inc.
    Inventor: Don S. Wozniak
  • Patent number: 5037875
    Abstract: The dissipation of static electricity from film of ethylene/carboxylic acid copolymer is improved by the incorporation of a combination of antistatic compounds therein, viz sorbitan monooleate and certain alkyl phenol poly(ethylene oxides).
    Type: Grant
    Filed: January 2, 1991
    Date of Patent: August 6, 1991
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: James R. deGaravilla
  • Patent number: 5025922
    Abstract: Disclosed is a thermoplastic polymeric composition having antistatic characteristics and a method to make same. The composition comprises a thermoplastic polymer in admixture with an antistatic agent. In one embodiment the polymer is nylon 12 and the agent is N-butyl benzenesulfonamide. Also disclosed is the antistatic polymeric composition in a film, which is useful for packaging static sensitive devices such as electronic circuit boards, or for packaging devices that must be protected from static electricity such as devices in a medical operating room where explosive oxygen and/or ether are present.
    Type: Grant
    Filed: June 9, 1989
    Date of Patent: June 25, 1991
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Marvin R. Havens, Joseph R. Lovin
  • Patent number: 5010139
    Abstract: An antistatic polymeric composition consisting of at least one antistatic additive of an ethylene oxide copolymer in the range of from about 3% to about 30% by weight and being a solid, nonionic material and having a dilution solution viscosity of greater than 0.25 g/ml and preferably having an average molecular weight greater than 20,000; and a polymeric material in the range from about 70% to about 97% by weight. The ethylene oxide copolymer comprises ethylene oxide in the range of from about 5% to about 95% by weight and at least 1 comonomer selected the group consisting of cyclic ethers, cyclic acetals, and cyclic esters, in the range of from about 95% to about 5% by weight. The polymeric material can be any thermoplastic, thermoplastic elastomer, or elastomer including ABS, ASA, polyamides, PBT, PET, PETG, PMMA, PUR, PVC, CPVC, PC, POM, POP, SMA, and SAN.
    Type: Grant
    Filed: June 14, 1989
    Date of Patent: April 23, 1991
    Assignee: The B. F. Goodrich Company
    Inventor: Simon H. P. Yu
  • Patent number: 4944998
    Abstract: A surface covering product having static dissipative electrical properties comprises a consolidated agglomeration of individual chips of polymeric material and wherein at least a portion of said individual chips contain an antistatic agent. A second portion of individual chips contain no antistatic agent or a reduced amount of antistatic agent.
    Type: Grant
    Filed: January 26, 1989
    Date of Patent: July 31, 1990
    Assignee: Armstrong World Industries, Inc.
    Inventors: Kenneth K. Ko, Jesse D. Miller, Jr., Wayne R. Shelly, Susan M. Von Stetten
  • Patent number: 4933233
    Abstract: A fire retardant antistatic coating and coated substrate. The coating includes a mixture of a radiation curable halogenated prepolymer, an effective amount of a quarternary ammonium compound antistatic agent and an effective amount of an antimony pentoxide flame retardant agent. A coated substrate having a substrate film material coated with the above coating is included. A method for making a fire resistant and antistatic film which includes the steps of: (a) providing a substrate film; (b) preparing the coating by mixing a radiation curable prepolymer with an effective amount of a quarternary ammonium antistatic compound and an effective amount of an antimony pentoxide fire retardant compound; (c) the coating is then applied to the film material; and (d) the coating is contacted with electron radiation in an amount sufficient to cure the coating.
    Type: Grant
    Filed: April 29, 1988
    Date of Patent: June 12, 1990
    Assignee: Metallized Products, Inc.
    Inventor: Allen H. Keough
  • Patent number: 4926526
    Abstract: A reusable closure is described which comprises an elongate member molded from a plastics material having memory. The member is formed with a reduced thickness live hinge line extending along its length and leg portions defined on opposite sides of the live hinge line which can be urged towards and away from each other between locked and released positions. An upstanding ear extending along the length of each leg portion has a locking portion adapted to releasably snap into locking engagement with a corresponding locking portion on the other ear in the locked position. Rounded areas join each ear to its respective leg portion. A packaging and storage system using such closures is described, and methods of making such closures by extrusion or injection molding are disclosed.
    Type: Grant
    Filed: January 13, 1986
    Date of Patent: May 22, 1990
    Inventors: Christine C. Brown, Dennis G. Brown
  • Patent number: 4911999
    Abstract: An improved electrostatic master is disclosed that contains a thiourea or thioamide electrostatic decay additive in a photopolymerizable composition of an ethylenically unsaturated monomer, an organic polymeric binder, and a photoinitiator system.
    Type: Grant
    Filed: December 13, 1988
    Date of Patent: March 27, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Carolyn C. Legere
  • Patent number: 4912142
    Abstract: This invention is an antistatic thermoplastic, phase-segregated polyurethane containing, as an antistatic additive an effective amount of a monovalent metal tetraphenylboron salt, in the substantial absence of a fatty acid salt, a C.sub.6 -C.sub.30 carboxylic acid ester or phosphate ester compound.Suprisingly, it has been found that, with this particular type of polyurethane, tetraphenylboron salts are very effective antistatic additives even in the absence of enhancer compounds as were previously employed. Accordingly, the antistatic polyurethane is useful for applications such as electronics components and packaging, and other applications where static dissipative ability is needed or desirable.
    Type: Grant
    Filed: November 16, 1988
    Date of Patent: March 27, 1990
    Assignee: The Dow Chemical Company
    Inventors: Robbert M. Vermeulen, Donald M. Maschmeyer
  • Patent number: 4906681
    Abstract: Disclosed is an anti-stat which is effective in polyvinyl chloride polymeric parts to dissipate charge phenomena occurring at a surface thereof. The anti-stat comprises an ethoxylated fat-forming alcohol and a dibasic acid-capped fat-forming alcohol which is incorporated in an effective amount in the polyvinyl chloride polymeric material.
    Type: Grant
    Filed: June 29, 1989
    Date of Patent: March 6, 1990
    Assignee: Sherex Chemical Company, Inc.
    Inventor: Don S. Wozniak
  • Patent number: 4899521
    Abstract: Disclosed is a film having antistatic characteristics and a method to make the film. The film comprises a blend of polyether block amide copolymer with an aromatic sulfonamide antistatic agent.
    Type: Grant
    Filed: September 28, 1987
    Date of Patent: February 13, 1990
    Assignee: W. R. Grace & Co. - Conn.
    Inventor: Marvin R. Havens
  • Patent number: 4898771
    Abstract: Disclosed is a thermoplastic polymeric composition having antistatic characteristics and a method to make same. The composition comprises a thermoplastic polymer in admixture with an antistatic agent. In one embodiment the polymer is polyethylene and the agent is a mixture of polyethoxylated cetyl alcohol and glyceryl monostearate. Also disclosed is the antistatic polymeric composition in a film, which is useful for packaging static sensitive devices such as electronic circuit boards, or for packaging devices that must be protected from static electricity such as devices in a medical operating room where explosive oxygen and/or ether are present.
    Type: Grant
    Filed: September 21, 1988
    Date of Patent: February 6, 1990
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Marvin R. Havens
  • Patent number: 4888134
    Abstract: A conductive foam having a surface resistance of not more than 9.9.times.10.sup.10 ohms as measured by DIN 53,345 may be prepared by incorporating into the base compound at least about 5 parts by dry weight per 100 parts by weight of polymer of a dispersion of carbon black stabilized by a soap predominantly of the same type as that compatible with the process used to set the foam; and processing the compound in a conventional manner.
    Type: Grant
    Filed: July 19, 1988
    Date of Patent: December 19, 1989
    Assignee: BASF Aktiengesellschaft
    Inventors: Jean-Pierre Kleitz, Piere H. A. Mertzeisen
  • Patent number: 4882894
    Abstract: Disclosed is a thermoplastic polymeric composition having antistatic characteristics and a method to make same. The composition comprises a thermoplastic polymer in admixture with an antistatic agent. In one embodiment the polymer is nylon 12 and the agent is N-butyl benzenesulfonamide. Also disclosed is the antistatic polymeric composition in a film, which is useful for packaging static sensitive devices such as electronic circuit boards, or for packaging devices that must be protected from static electricity such as devices in a medical operating room where explosive oxygen and/or ether are present.
    Type: Grant
    Filed: October 14, 1986
    Date of Patent: November 28, 1989
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Marvin R. Havens, Joseph R. Lovin
  • Patent number: 4875581
    Abstract: The invention features a static dissipative elastomeric outer coating for an electronic package composite. The coating is characterized by its superior abrasion resistant and electrical properties. The coating chemically bonds with the conductive layer and has superior static dissipative qualities characterized by a surface resistivity in the range of between 10.sup.5 and 10.sup.11 ohms per square.
    Type: Grant
    Filed: March 19, 1985
    Date of Patent: October 24, 1989
    Assignees: Robert B. Ray, Robert A. Neal
    Inventors: Robert Ray, Robert A. Neal, John R. Jaran, Tim Parker
  • Patent number: 4826912
    Abstract: A surface covering product having static dissipative electrical properties is shown, which surface covering product comprises a consolidated agglomeration of individual chips of polymeric material and wherein at least a portion of said individual chips contain an antistatic agent.
    Type: Grant
    Filed: July 29, 1987
    Date of Patent: May 2, 1989
    Assignee: Armstrong World Industries, Inc.
    Inventors: Kenneth K. Ko, Jesse D. Miller, Jr., Wayne R. Shelly, Susan M. Von Stetten
  • Patent number: 4818437
    Abstract: Improved compositions are disclosed which are useful in providing a conductive layer of coating on a surface to provide protection against harmful electrostatic discharges. Also disclosed are compositions useful in absorbing and dissipating mechanical and electromagnetic energy and preventing electrostatic build-up; these compositions also provide electromagnetic compatability. The compositions contain elemental carbon and a polymeric matrix or binder. The improvement comprises employing a unique ground calcined, coal-based coke which approaches graphite in terms of its performance as a conductive additive or pigment but which does not possess the disadvantages associated with the use of graphite.The unique coke employed in the compositions and methods of the present invention has a level of graphitic structure which approaches that of a true graphite. This level of graphitization can be most easily recognized by utilizing x-ray powder diffraction. More specifically, when the value of E.sub.
    Type: Grant
    Filed: July 19, 1985
    Date of Patent: April 4, 1989
    Assignee: Acheson Industries, Inc.
    Inventor: Robert E. Wiley
  • Patent number: 4775716
    Abstract: An antistatic thermoplastic composition is provided which comprises about 80% or more by weight of a thermoplastic resin component which includes an ABS graft copolymer; and about 20% or less by weight of an epihalohydrin copolymer of an epihalohydrin and an oxirane-containing comonomer, wherein the ratio by weight of said epihalohydrin to said comonomer is less than 13:7.
    Type: Grant
    Filed: May 12, 1986
    Date of Patent: October 4, 1988
    Assignee: Borg-Warner Chemicals, Inc.
    Inventors: George Kipouras, Alan R. Federl
  • Patent number: 4764428
    Abstract: A pelletizing antistatic agent composition and a method of forming same are provided. The composition includes a predominantly C.sub.18 alkyl ethoxylated primary amine component and a metal stearate type of component, preferably together with an antioxidant. The resulting composition is formed into a plurality of pellets and functions as an antistatic agent in plastics of various types, such as food packaging polyolefin materials.
    Type: Grant
    Filed: May 29, 1987
    Date of Patent: August 16, 1988
    Assignee: Witco Chemical Corporation
    Inventor: Stewart E. Gloyer
  • Patent number: 4687801
    Abstract: A resin composition which consists essentially of a thermoplastic resin, in which are included an alkali metal salt, and at least one kind of substances selected from the group consisting of vinylidene fluoride resin and dipolar aprotic solvents.
    Type: Grant
    Filed: September 17, 1985
    Date of Patent: August 18, 1987
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Tetsuo Mitani, Fumiaki Baba, Katsuyoshi Iisaka
  • Patent number: 4661547
    Abstract: An antistatic material containing a base material which is rubber and/or polyvinyl cloride resin, to which are added a cationic quaternary ammonium salt and polyethylene glycol, and optionally aluminum hydroxide or calcium carbonate. The antistatic material has a low electric resistance and excellent thermal stability, and can be colored in any color.
    Type: Grant
    Filed: November 8, 1985
    Date of Patent: April 28, 1987
    Assignee: Nippon Rubber Co., Ltd.
    Inventors: Masasuke Harada, Kouji Tsukamoto, Tomohiro Etou
  • Patent number: 4645717
    Abstract: A treating solution for use in impregnating a paper sheet material useful in the preparation of electrically conductive high-pressure thermoset laminates, which treating solution comprises in combination: an aqueous resin solution which includes a heat-curable thermosetting formaldehyde-type resin; and, an electrically conductive amount of a quaternary ammonium compound sufficient to impart an electrical resistivity of about 10.sup.10 ohms per square inch or less to the impregnated thermoset paper sheet material.
    Type: Grant
    Filed: February 4, 1986
    Date of Patent: February 24, 1987
    Assignee: Charleswater Products, Inc.
    Inventor: George R. Berbeco
  • Patent number: 4629585
    Abstract: A foamable antistatic polymer composition is provided comprising a thermoplastic polymer, an elastomeric polymer, conductive carbon black having BET surface area of at least 500 m.sup.2 /g and an amount of a blowing agent effective to expand said composition.
    Type: Grant
    Filed: June 27, 1984
    Date of Patent: December 16, 1986
    Assignee: Uniroyal Plastics Company, Inc.
    Inventors: Wendell J. McCracken, Roger C. Schmidt
  • Patent number: 4617325
    Abstract: An antistatic agent for polymers, particularly polyurethanes is disclosed comprising an ionizable metal salt and an enhancer comprising a phosphate ester.
    Type: Grant
    Filed: July 2, 1985
    Date of Patent: October 14, 1986
    Assignee: The Dow Chemical Company
    Inventors: Thomas M. Knobel, Earl E. Kennedy, Mary A. Walker
  • Patent number: 4614675
    Abstract: A composition for treating a solid material to give it antimicrobic, hydrophilic and antistatic properties comprises siloxane compound which has one or more alkoxysilylalkyl groups and one or more polyoxyalkylene groups and a silane having antimicrobial properties. In a preferred embodiment the composition is used to treat fibers and fiber-containing materials. The composition can further contain a curing agent for the siloxane. Emulsion compositions are particularly useful.
    Type: Grant
    Filed: December 20, 1985
    Date of Patent: September 30, 1986
    Assignee: Toray Silicone Co., Ltd.
    Inventors: Isao Ona, Masaru Ozaki
  • Patent number: 4613520
    Abstract: Described are coating compositions having improved antistatic properties and particularly magnetic coating compositions suitable for magnetic recording media. The compositions comprise at least one film-forming synthetic resin and, based on coating solids, from about 0.2 to about 10% of an alkali, alkaline earth, ammonium or amine salt of a perfluoroalkyl sulfonic acid or carboxylic acid.
    Type: Grant
    Filed: January 25, 1985
    Date of Patent: September 23, 1986
    Assignee: Hercules Incorporated
    Inventor: Sunil P. Dasgupta
  • Patent number: 4579902
    Abstract: The present invention provides a permanently antistatic, injection moldable thermoplastic composition comprising a polybutylene terephthalate resin having an intrinsic viscosity in the range of about 0.7 to about 1.4 deciliters per gram measured in ortho-chlorophenol at 25.degree. C., an antistatic dopant comprising an electron acceptor compound, an electron donor compound, and polytetrafluoroethlene, and less than about 10 percent by weight based on the total weight of the molding composition of carbon fibers having lengths between about 0.1 and about 1.0 inch. Such a molding composition exhibits a volume resistivity of less than 1.times.10.sup.8 ohm-cm, exceptional low wear performance, excellent mechanical properties, and ease of manufacture.
    Type: Grant
    Filed: December 5, 1984
    Date of Patent: April 1, 1986
    Assignee: Celanese Corporation
    Inventor: David P. O'Brien
  • Patent number: 4559380
    Abstract: A polyacetal composition which comprises polyacetal, an aliphatic ester of a polyhydric alcohol having a hydroxy group, polyethylene glycol, and an organometallic salt, wherein the organometallic salt is present in an amount of from 0.01 to 5 percent by weight based on the total composition.
    Type: Grant
    Filed: April 8, 1985
    Date of Patent: December 17, 1985
    Assignee: Polyplastics Company, Ltd.
    Inventors: Takuzo Kasuga, Yukio Ikenaga, Masami Yamawaki, Keizo Tanimura
  • Patent number: 4526952
    Abstract: Antistatic and/or electrically conductive thermoplastic polyurethanes contain carbon black whose surface area determined by the BET method is from 600 to 1200 m.sup.2 /g, have a dibutylphthalate absorption number of 300 to 450 cm.sup.3 /100 g, a pour density of less than 250 kg/m.sup.3, and an average particle size less than 50 nm.Incorporation of the carbon black into the thermoplastic polyurethane produced by the continuous sheet method takes place at temperatures under the primary melt peak for the crystalline rigid segments, measured by means of differential calorimetry, preferably in an extruder.The products are suitable for preparing films for flat heating elements, antistatic hoses, cables, and profiles.
    Type: Grant
    Filed: June 14, 1984
    Date of Patent: July 2, 1985
    Assignee: BASF Aktiengesellschaft
    Inventors: Gerhard Zeitler, Gerhard Bittner, Knud Faehndrich, Hans M. Rombrecht
  • Patent number: 4504431
    Abstract: This application discloses a process of making electrically conductive fiber glass articles whereby carbon black is mixed with the resin to provide the desired value of electrical conductivity. A large amount of titanium dioxide is added to counteract the black color resulting from the carbon black addition. The resulting paste is added to fiber glass and the resin is cured thus resulting in a light gray or other gray tones. It is important that the carbon black, titanium and resin be thoroughly mixed to disperse the carbon and other pigments, and the mixing may be accomplished by means of a high intensity mixer or ball mill.
    Type: Grant
    Filed: November 2, 1983
    Date of Patent: March 12, 1985
    Assignee: Molded Fiber Glass Companies
    Inventors: Robert E. Mollman, Ralph Silva
  • Patent number: 4450249
    Abstract: The present invention relates to polycarbonate articles and films characterized by their antistatic properties comprising polycarbonate resin and alkali, or alkali earth, salts of specific aromatic sulfonic acids, specific aromatic phosphonic acids or aromatic partial phosphoric acid esters.
    Type: Grant
    Filed: August 19, 1982
    Date of Patent: May 22, 1984
    Assignee: Bayer Aktiengesellschaft
    Inventors: Manfred Schmidt, Joachim Wank, Eckart Reese, Dieter Freitag, Klaus Wangermann, Wolfgang Cohnen
  • Patent number: 4438059
    Abstract: This application discloses a process of making electrically conductive fiber glass articles whereby carbon black is mixed with the resin to provide the desired value of electrical conductivity. A large amount of titanium dioxide is added to counteract the black color resulting from the carbon black addition. The resulting paste is added to fiber glass and the resin is cured thus resulting in a light gray or other gray tones. It is important that the carbon black, titanium and resin be thoroughly mixed to disperse the carbon and other pigments, and the mixing may be accomplished by means of a high intensity mixer or ball mill.
    Type: Grant
    Filed: September 22, 1982
    Date of Patent: March 20, 1984
    Assignee: Molded Fiber Glass Companies
    Inventors: Robert E. Mollman, Ralph Silva