Conjugated Diene Hydrocarbon Monomer Patents (Class 524/571)
  • Patent number: 5227425
    Abstract: A sulfur-vulcanizable rubber composition obtained by thermomechanical worg of a conjugated diene compound and an aromatic vinyl compound prepared by solution polymerization in a hydrocarbon solvent having a total content of aromatic vinyl compound of between 5% and 50% and a glass transition temperature (Tg) of between 0.degree. C. and -80.degree. C. with 30 to 150 parts by weight per 100 parts by weight of elastomer of a silica having a BET surface area of between 100 and 250 m.sup.2 /g, a CTAB surface area of between 100 and 250 m.sup.2 /g, an oil absorption measured in DBP of between 150 and 250 ml/100 g, and an average projected area of the aggregates greater than 8500 nm.sup.2 before use and between 7000 and 8400 nm.sup.2 after thermomechanical mixing as well as the additives conventionally employed, with the exception of the sulfur vulcanization system, comprising at least one heat step reaching a temperature of between 130.degree. C. and 180.degree. C.
    Type: Grant
    Filed: February 20, 1992
    Date of Patent: July 13, 1993
    Assignee: Compagnie Generale des Etablissements Michelin-Michelin & Cie
    Inventor: Roland Rauline
  • Patent number: 5223568
    Abstract: A forming process for producing a hard shaped molded article that includes subjecting a moldable thermosetting composition to a high temperature cure condition at a temperature greater than about 250.degree. C. and less than the decomposition temperature of the composition to form a crosslinked polymeric network. In particular, the invention features a forming process for producing a hard shaped molded article that includes the steps of(a) providing a moldable thermosetting composition that includes 1) a polybutadiene or polyisoprene resin which is a liquid at room temperature and which has a molecular weight less than 5,000 and a large number of pendent vinyl groups and 2) a solid butadiene- or isoprene-containing polymer (e.g, a thermoplastic elastomer);(b) forming the composition into a shape; and(c) curing the composition to produce the article including subjecting the composition to a high temperature cure condition at a temperature greater than about 250.degree. C.
    Type: Grant
    Filed: May 9, 1989
    Date of Patent: June 29, 1993
    Assignee: Rogers Corporation
    Inventors: Vincent R. Landi, J. Mark Mersereau, Walter A. Robbins
  • Patent number: 5218056
    Abstract: A polyisoprene elastomer has a polyisoprene content with an average molecular weight in the range of 15,000 to 70,000 and preferably 25,000 to 50,000. This has been cross-linked with an unsaturated aromatic compound and cured with a sulfur or peroxide curing system. The elastomer has an extremely low compression set (0 to 5%) and an extremely low durometer (Shore A, 0 to 20). The elastomer is lightweight, soft, flexible and durable and its properties make its shock-absorbing and shock-attenuating characteristics unique. It is therefore highly suitable for insole and/or midsole components in footwear.
    Type: Grant
    Filed: January 23, 1991
    Date of Patent: June 8, 1993
    Assignee: Banpan Research Laboratory, Ltd.
    Inventors: Kiartchai Santiyanont, Narong Chokwatana, Jariya Boonjawat
  • Patent number: 5214102
    Abstract: A method of producing fluorinated elastomeric articles having reduced coefficients of friction, improved wear life and improved resistance to fluid permeability. A thermoplastic elastomeric article is exposed to gaseous fluorine in a reactor vessel under reaction conditions sufficient to create a fluorinated material on the external portions of the elastomeric article, which fluorinated material extends inwardly into the matrix of the article, without promoting degradation of the tensile properties of the article.
    Type: Grant
    Filed: December 5, 1991
    Date of Patent: May 25, 1993
    Assignee: William S. Shamban
    Inventors: Ronald E. Zielinski, Mark J. Seabury
  • Patent number: 5202363
    Abstract: A reinforcing agent for vulcanizable rubber compounds comprises an anhydrous metal salt of an .alpha.,.beta.-ethylenically unsaturated carboxylic acid having a crystalline structure consisting essentially of plates and fibers. Vulcanizable rubber compounds containing such reinforcing agents have improved physical properties over rubber compounds containing conventional metal carboxylic acid salts. Methods for the preparation of such anhydrous metal salts and methods for the reinforcement of vulcanizable rubber compounds therewith are also provided.
    Type: Grant
    Filed: April 16, 1990
    Date of Patent: April 13, 1993
    Assignees: Bridgestone/Firestone, Inc., Bridgestone Corporation
    Inventors: Arthur E. Oberster, Takatsugu Hashimoto
  • Patent number: 5171632
    Abstract: Shaped articles such as fibers, films, tapes, rods and the like are fabricated from composites of nonconducting, flexible chain carrier polymers and conductive, conjugated polymers. The shaped, composite articles are electrically conductive and also display excellent mechanical properties, i.e., with respect to tensile strength, elongation at break, and the like. Methods of preparing the novel composite articles are disclosed as well.
    Type: Grant
    Filed: January 24, 1990
    Date of Patent: December 15, 1992
    Assignee: Regents of the University of California
    Inventors: Alan J. Heeger, Paul Smith, Shizuo Tokito, Jeffrey D. Moulton, Shizuo Tokito
  • Patent number: 5109055
    Abstract: A rubber composition comprising a base rubber, carbon black and a dinitrodiamine compound represented by the formula [I], ##STR1## wherein X is a divalent aliphatic, alicyclic or aromatic group which may contain halogen or oxygen in the group, R.sup.1 is hydrogen or an aliphatic, alicyclic or aromatic group, provided that two nitrogen atoms linking through X may further link through R.sup.1 when both X and R.sup.1 are the aliphatic groups, and R.sup.2 and R.sup.3 independently of one another are each hydrogen or an alkyl of 1 to 12 carbon atoms, provided that R.sup.2 and R.sup.3 may conjointly form a ring,is improved in its scorching without deterioration in its dynamic properties by incorporating thereto the following components (A) or (B):(A) N-(cyclohexylthio)phthalimide and a bismaleimide compound, or(B) 2,3,5,6-tetrachloro-1,4-benzoquinone.
    Type: Grant
    Filed: July 5, 1990
    Date of Patent: April 28, 1992
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Hideo Nagasaki, Naoki Inui, Shinichi Yachigo
  • Patent number: 5109038
    Abstract: Polymer particles which carry, implanted on their surface, amphiphilic molecules carrying ion-forming or reactive groups, and dispersions thereof, which may be prepared by contacting a latex of particles of a polymer having a glass transition temperature Tg greater than about 40.degree. C., with an amphophilic compound having an HLB greater than or equal to 10 and a molecular weight greater than or equal to 400. The contacting is carried out at a temperature within the glass transition zone of the polymer, until enmeshing of the polymer chains and of the hydrophobic blocks of the amphiphilic compound has been achieved. The hydrophilic block of the amphiphilic compound carries at least one ion-forming or reactive group. The particles and their dispersions are useful in biological applications.
    Type: Grant
    Filed: June 5, 1990
    Date of Patent: April 28, 1992
    Assignee: Rhone-Poulenc Chimie
    Inventors: Bernard Chauvel, Jean-Claude Daniel, Christian Pusineri
  • Patent number: 5109081
    Abstract: A continuous thermal polymerization process for the manufacture of cyclic hydrocarbon resins. The molecular weight of polymerized cyclic hydrocarbon resins is controlled with selected process temperatures for the feed, selected times in the reactor, and recycle of thermal polymerized product.
    Type: Grant
    Filed: December 28, 1990
    Date of Patent: April 28, 1992
    Assignee: Exxon Chemical Patents, Inc.
    Inventors: Richard B. Pannell, Gerhardt E. Wissler
  • Patent number: 5098949
    Abstract: Disclosed is a novel curing system which is not associated with decomposition or production of low molecular materials. The curing system employs an aqueous composition which comprises (a) a compound having in one molecule at least two carbonylcyclic urea groups represented by the following formula (1) ##STR1## [wherein n is an integer of 0 to 5, X which may be the same or different and represents oxygen atom, a sulfur atom or --NR.sub.1 -- in which R.sub.1 is a hydrogen atom, an alkyl, hydroxyalkyl or alkylene group having 1 to 5 carbon atoms.] and (b) a basic resin which has a functional group reactive with an isocyanate group and is water soluble or water dispersible by neutralizing.
    Type: Grant
    Filed: December 29, 1989
    Date of Patent: March 24, 1992
    Assignee: Nippon Paint Co., Ltd.
    Inventors: Hiroyuki Sakamoto, Kenshiro Tobinaga, Noriyuki Tsuboniwa, Satoshi Urano, Yasuyuki Tsuchiya, Hirotoshi Umemoto
  • Patent number: 5096973
    Abstract: An unsaturated, elastomeric ABC block copolymer comprised of the monomer units of 40 to 80% of 1,3-butadiene, 5 to 40% of isoprene and 2 to 30% of styrene, said copolymer comprising i) 40 to 75% of block A which contains styrene and butadiene units or isoprene and butadiene units with a content of distributed vinyl or isopropenyl groups of less than 15%, iia) up to 25% of a block B which contains styrene and butadiene units or isoprene and butadiene units with a vinyl or isopropenyl content of more than 70%, or iib) up to 25% of a block B' which contains styrene, isoprene and optionally butadiene units with a content of homogeneously distributed isopropenyl or vinyl groups of less than 15%, and iii) 20 to 55% of a block C which contains styrene and isoprene units and optionally butadiene units with an isopropenyl or vinyl content of more than 70%.
    Type: Grant
    Filed: October 1, 1990
    Date of Patent: March 17, 1992
    Assignee: Huels Aktiengesellschaft
    Inventors: Christoph Herrmann, Walter Hellermann, Hans-Bernd Fuchs, Karl-Heinz Nordsiek, Juergen Wolpers
  • Patent number: 5096943
    Abstract: A method for incorporating metal salts of .alpha.,.beta.-ethylenically unsaturated carboxylic acids into polymers and improving the cured physical properties of vulcanizable rubber compositions based on such polymers. The method includes the steps of preparing a polymer cement in a suitable organic solvent, forming a suspension of the metal salt of an .alpha.,.beta.-ethylenically unsaturated carboxylic acid in a suitable aliphatic hydrocarbon solvent miscible with the organic solvent, mixing the polymer cement and the suspension together and thereafter removing the solvents to provide the metal salt uniformly dispersed within the polymer.
    Type: Grant
    Filed: April 16, 1990
    Date of Patent: March 17, 1992
    Assignees: Bridgestone/Firestone, Inc., Bridgestone Corporation
    Inventors: Takatsugu Hashimoto, David M. Roggeman, Arthur E. Oberster, Jung W. Kang
  • Patent number: 5039725
    Abstract: The inventive rubber composition comprises (a) an EPM or EPDM rubber, (b) an organopolysiloxane, (c) a finely divided silica filler and (d) a polyoxyethylene glycol having a specified average molecular weight, this last component being the characteristic ingredient. By virtue of the unique formulation, the rubber composition is outstandingly free from the troubles that the surface of a metal mold, in which the rubber composition is repeatedly molded and vulcanized with heating to give vulcanized rubber articles, becomes stained so as to necessitate frequent cleaning works for continuing the molding process so that a great improvement can be obtained in the productivity in the manufacture of rubber articles.
    Type: Grant
    Filed: January 26, 1990
    Date of Patent: August 13, 1991
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Tsutomu Nakamura, Takeshi Fukuda
  • Patent number: 5037872
    Abstract: There is described the use of substituted N-trichloromethyl thiodicarboximides in combination with N,N'-substituted bis-(2,4-diamino-s-triazin-6-yl)-oligosulfides in vulcanizable rubber mixtures in order to improve the vulcanization characteristics and such rubber mixtures.
    Type: Grant
    Filed: February 21, 1989
    Date of Patent: August 6, 1991
    Assignee: Federal Republic of Germany
    Inventors: Werner Schwarze, Siegfried Wolff, Horst Lambertz
  • Patent number: 5030695
    Abstract: Ziegler-Natta catalyzed polymer chains are end capped with at least one functional group-containing unit which is otherwise essentially absent from said polymer chain. The chains can be grafted to form graft copolymers and star copolymers. The compositions are useful as oil additives and in general purpose elastomer as well as thermoplastic polymer compositions.
    Type: Grant
    Filed: September 12, 1988
    Date of Patent: July 9, 1991
    Assignee: Exxon Research & Engineering Company
    Inventors: Charles Cozewith, Shiaw Ju, Gary W. Verstrate
  • Patent number: 5026756
    Abstract: An adhesive composition comprising a polymer, a tackifier, and a plasticizing amount in the range of 5-40% by weight, 1,4-cyclohexane dimethanol dibenzoate.
    Type: Grant
    Filed: August 3, 1988
    Date of Patent: June 25, 1991
    Assignee: Velsicol Chemical Corporation
    Inventor: William D. Arendt
  • Patent number: 5013785
    Abstract: In the present invention, a polymer having a number average molecular weight (Mn) of from 200 to 40,000 and a glass transition point of from -75.degree. C. to +10.degree. C. which is obtained by the cationic polymerization of a branched alpha-olenin is used as a tackifier (a tacky producer) for a hot melt adhesive or a pressure-sensitive adhesive. An adhesive composition containing the polymer described above as a tackifier has excellent heat resistance, hue, weather resistance, and the like and has such excellent characteristics that its odor is weak.
    Type: Grant
    Filed: August 8, 1988
    Date of Patent: May 7, 1991
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventor: Kinya Mizui
  • Patent number: 5008343
    Abstract: A block-free polymer is prepared by anionically polymerizing at least two compounds selected from the groups consisting of butadiene, isoprene and styrene in an inert organic solvent in the presence of an organolithium compound as a catalyst and a cocatalyst of a glycol dialkyl ether: ##STR1## wherein R.sub.3 is hydrogen, methyl or ethyl, R.sub.1 and R.sub.2 are alkyl groups of different numbers of carbon atoms selected from the group consisting of methyl, ethyl, n-propyl, isopropyl, n-butyl, iso-butyl, sec-butyl and t-butyl, and the total number of carbon atoms in the alkyl group ranges from 5 to 7.
    Type: Grant
    Filed: February 20, 1990
    Date of Patent: April 16, 1991
    Assignee: Huels Aktiengesellschaft
    Inventors: Walter Hellermann, Christoph Herrmann, Hans-Bernd Fuchs, Karl-Heinz Nordsiek, Jurgen Wolpers
  • Patent number: 4981730
    Abstract: In accordance with the present invention, there is provided an aqueous and low VOC composition which is particularly useful as a coating composition for non-porous substrates. The aqueous compositions comprise(A) at least one water-dispersible or emulsifiable olefin polymer;(B) at least one non-ionic surfactant;(C) at least one anionic surfactant;(D) at least one volatile organic liquid; and(E) water.Preferably, the aqueous compositions are in the form of oil-in-water emulsions. The invention also relates to a process of preparing the low VOC oil-in-water emulsions, and to the use of such coating compositions as adherent primer coatings for substrates, and in particular, non-porous substrates.
    Type: Grant
    Filed: May 19, 1989
    Date of Patent: January 1, 1991
    Assignee: Man-Gill Chemical Company
    Inventor: Richard R. Zaleski
  • Patent number: 4981900
    Abstract: The invention relates to EPDM rubber seals for use in hydraulic cylinders such as the cylinders of automotive brake and clutch systems. Using an EPDM rubber composition carefully formulated so as to be good in kneadability, rubber seals having good resistance to yielding or loss of resiliency by fatigue as well as sufficient strength and elongation are obtained. Essential components of the rubber composition are 100 parts by weight of EPDM coplymer rubber, 30-80 parts by weight of carbon black and 1-5 parts by weight of a peroxide as cross-linking agent. It is important to use an EPDM copolymer in which the distribution of ethylene is uneven such that the content of ethylene is highest in a fraction highest in molecular weight and is lowest in another fraction lowest in molecular weight. The difference in ethylene content between these two fractions of the copolymer should be more than 5 wt % and not more than 9 wt %.
    Type: Grant
    Filed: October 17, 1988
    Date of Patent: January 1, 1991
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Hiroshi Sugawara
  • Patent number: 4977204
    Abstract: A non-aqueous shade enhancing agent composition comprises (a) a copolymer obtained by graft-polymerizing a main chain polymer being substantially insoluble in a non-aqueous solvent having a solubility parameter in the range of 6.5 t0 10.0 with a branch polymer being soluble in said solvent at a weight ratio of the main chain polymer to the branch polymer in the range between 90/10 and 10/90 and (b) a specific quaternary ammonium salt.
    Type: Grant
    Filed: October 20, 1988
    Date of Patent: December 11, 1990
    Assignee: Kao Corporation
    Inventors: Tsutomu Nebashi, Kazuo Iguchi, Moriyasu Murata
  • Patent number: 4968469
    Abstract: Molded articles such as gaskets for container caps are made from a thermoplastic composition at high speed, for instance above 100 per minute, by continuously cutting a continuous supply of molten thermoplastic composition into molten pieces and transferring the molten pieces to a molding position at which they are molded into the gaskets or other desired articles, and the composition includes a melt-release material that continuously replenishes a melt-release layer on the surfaces by which the molten composition is cut and transferred to the molding position.
    Type: Grant
    Filed: February 16, 1990
    Date of Patent: November 6, 1990
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Steven A. C. White
  • Patent number: 4968728
    Abstract: A family of novel and unique synthetic alkali metal alumino-silicates (SAMS) are produced by the hydrothermal reaction between kaolin clay and alkali metal silicates. The integrated composition of the SAMS products is a unique entity having an overall composition ofxM.sub.2 O:Al.sub.2 O.sub.3 :ySiO.sub.2 :zH.sub.2 Owhere x is the number of moles of alkali metal oxide and is an integer from 0.01 to 2.0, M is an alkali metal, y is the number of moles of SiO.sub.2 in the unique SAMS composition, and z is the number of moles of bound water and is an integer ranging from 1.0 to 5.0. The composition essentially comprises altered kaolin clay platelets with an integral rim or protuberance of essentially amorphous alkali metal silicate-kaolin reaction product. The unique SAMS compositions are structured materials in which the structure can be controlled, and are therefore useful as functional fillers, as TiO.sub.
    Type: Grant
    Filed: January 19, 1989
    Date of Patent: November 6, 1990
    Assignee: J.M. Huber Corporation
    Inventor: Satish K. Wason
  • Patent number: 4966952
    Abstract: A novel process for providing a thermoplastic polymer having novel thermal characteristics including the critical step of masticating the polymer, either continuously or discontinuously, until the melt index of the polymer is substantially increased.
    Type: Grant
    Filed: December 29, 1987
    Date of Patent: October 30, 1990
    Assignee: The Hygenic Corporation
    Inventor: John Riaza
  • Patent number: 4959406
    Abstract: Plastic containing small amounts of titanium dioxide and, if appropriate, carbon black and an additive which reduces the tracking resistance, for the production of laser-writable mouldings.
    Type: Grant
    Filed: February 6, 1989
    Date of Patent: September 25, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Eckard Foltin, Hans-Werner Depcik, Karl Huff, Alfred Pischtschan, Mehmet C. Yesildag, Reiner Erkelenz
  • Patent number: 4952622
    Abstract: Polymer particles which carry, implanted on their surface, amphiphilic molecules carrying ion-forming or reactive groups, and dispersions thereof, which may be prepared by contacting a latex of particles of a polymer having a glass transition temperature Tg greater than about 40.degree. C., with an amphiphilic compound having an HLB greater than or equal to 10 and a molecular weight greater than or equal to 400. The contacting is carried out at a temperature within the glass transition zone of the polymer, until enmeshing of the polymer chains and of the hydrophobic blocks of the amphiphilic compound has been achieved. The hydrophilic block of the amphiphilic compound carries at least one ion-forming or reactive group. The particles and their dispersions are useful in biological applications.
    Type: Grant
    Filed: May 6, 1988
    Date of Patent: August 28, 1990
    Assignee: Rhone Poulenc Chimie
    Inventors: Bernard Chauvel, Jean-Claude Daniel, Christian Pusineri
  • Patent number: 4929662
    Abstract: Polymer particles possessing, implanted on their surface, amphiphilic molecules carrying ion-forming or reactive groups, and dispersions thereof, prepared by diffusing, into a previously prepared aqueous seeding dispersion of polymer particles, an organosoluble polymerization initiator, swelling the particles of the dispersion thus obtained by introducing a monomer composition comprising at least one monomer and at least one amphiphilic compound, and polymerizing the monomer composition.
    Type: Grant
    Filed: May 6, 1988
    Date of Patent: May 29, 1990
    Assignee: Rhone-Poulenc Chimie
    Inventors: Roger Hogenmuller, Bernard Chauvel, Jean-Claude Daniel
  • Patent number: 4923918
    Abstract: A process for producing a modified propylene polymer composition is disclosed, which comprises melt-kneading a propylene polymer having a considerable titanium or vanadium content as a catalyst residue and having incorporated therein a phenolic antioxidant in the presence of a radical generator in combination with a specific amount of a zinc salt of a carboxylic acid. The resulting modified propylene polymer composition exhibits freedom from coloring as well as improved moldability.
    Type: Grant
    Filed: June 8, 1988
    Date of Patent: May 8, 1990
    Assignee: Chisso Corporation
    Inventors: Nobutoshi Komori, Hirokazu Nakazima
  • Patent number: 4912151
    Abstract: A method for manufacturing pourable pulverulent rubber-filler mixtures starting from rubber solutions is disclosed. In this method, the filler is dispersed in an organic solvent and then mixed with a rubber solution to obtain a stable rubber-containing filler dispersion. The dispersion is then introduced into hot water containing a dispersed filler and subjected to high shear forces, causing the organic solvent to simultaneously be largely distilled off. After the rubber-containing filler dispersion has been completely added, an aqueous filler dispersion is added, water is removed from the precipitated rubber-filler mixture, and the product mixture is dried under constant agitation.
    Type: Grant
    Filed: January 30, 1989
    Date of Patent: March 27, 1990
    Assignee: Huels Aktiengesellschaft
    Inventor: Ralf Tappe
  • Patent number: 4895884
    Abstract: There is disclosed the use of microencapsulated antidegradants in rubber and a process for the production of microencapsulated antidegradants. More specifically, this invention is directed to the cellulose acetate microencapsulation of para-phenylene diamine based antiozonants at wall to core ratios greater than 1:1 but less than 4:1. The microcapsules preferably have a particle diameter of less than 50 microns. The microencapsulated antidegradant prepared and used according to this invention provides long term protection to rubber articles that are subject to ozone and oxygen attack.
    Type: Grant
    Filed: October 6, 1987
    Date of Patent: January 23, 1990
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: David A. Benko, Larry R. Evans, James G. Gillick, Walter H. Waddell, Barbara A. Metz, Benjamin F. Benton, Gordon E. Pickett, William R. Krumm
  • Patent number: 4882407
    Abstract: A novel process for providing a thermoplastic polymer having unique thermal characteristics including the step of cooling the polymer during extended mastication until the melt index of the polymer is substantially increased.
    Type: Grant
    Filed: April 18, 1988
    Date of Patent: November 21, 1989
    Assignee: The Hygenic Corporation
    Inventor: John Riazi
  • Patent number: 4871590
    Abstract: A thixotropic hot-melt adhesive contains reactive silane groups and is still viscous and plastically moldable after cooling. It contains a mixture ofat least one thermoplastic material, andat least one thixotropic agent,wherein silane groups are contained either in the thermoplastic material itself or in at least one added silane-based binder.
    Type: Grant
    Filed: November 6, 1987
    Date of Patent: October 3, 1989
    Assignee: Sika AG, vorm. Kaspar Winkler & Co.
    Inventors: Peter W. Merz, Lutz-Dieter Zabel
  • Patent number: 4868023
    Abstract: An article having a surface comprising an olefin polymer is marked with indicia using an ink comprising a binder capable of substantially complete cure at a temperature of about 100.degree. to 300.degree. C. for less than about 10 minutes and then heated to cure the binder. The indicia are permanent, e.g. are resistant to being rubbed off and are solvent resistant. Heat-recoverable marker sleeves having such permanent indicia are particularly useful for marking wires, e.g. in aircraft harnessing.
    Type: Grant
    Filed: October 2, 1987
    Date of Patent: September 19, 1989
    Assignee: Raychem Corporation
    Inventors: David Ryan, Lawrence D. Schwartz, Philip Wallis, Kenneth M. Winterstein
  • Patent number: 4851469
    Abstract: Rubber compositions are disclosed which are capable of exhibiting superior adhesion and high water resistance in bonding rubbers to brass and to organic fiber cords and also to different rubbers. Such bonding characteristics can be obtained by the use of specified amounts of a selected class of organic sulfur-containing compounds combined with sulfur-curable rubbers, silica, resorcin donors and methylene donors. Hoses are also disclosed which have these compositions applied as adhesive layers.
    Type: Grant
    Filed: November 16, 1988
    Date of Patent: July 25, 1989
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventor: Tomoji Saitoh
  • Patent number: 4840988
    Abstract: This invention is a rubber composition for a tire tread of 100 parts by weight (pbw) diene system rubber to which are added x pbw of carbon black and y pbw of softening agent. The softening agent contains z pbw of liquid polymer. The amounts of x, y and z are described by the inequalities (5/8)x-20.ltoreq.y.ltoreq.x and (y/5)+5.ltoreq.z. The liquid polymer has a flow points of 20.degree. C. or below. The rubber composition provided here gives a tire tread with improved performance in terms of grade climbing ability, braking and standing start, on ice as well as on snow. Besides, the service life of the rubber is prolonged, and tread performance deterioration is reduced to a minimum.
    Type: Grant
    Filed: February 16, 1988
    Date of Patent: June 20, 1989
    Assignee: Toyo Tire & Rubber Co., Ltd.
    Inventors: Rinichi Nakayama, Yasunori Yoshida, Satoshi Iwama
  • Patent number: 4826638
    Abstract: The invention relates to the use of a fraction of hardened particles of an elastomer material of limited particle sizes between 0.1 and 1 mm, preferably between 0.3 and 0.7 mm. The order of magnitude of the admixture to every 100 parts of unhardened elastomer material lies at 5 to 60 parts, preferably 20 to 40 parts. The admixture of the particles to the elastomer material is effected before the elastomer material hardens and is done to produce a defined, non-smooth surface in end products made of elastomers.
    Type: Grant
    Filed: July 14, 1987
    Date of Patent: May 2, 1989
    Assignee: Rehau AG+Co.
    Inventor: Siegfried Hopperdietzel
  • Patent number: 4820751
    Abstract: A rubber composition for tires having improved heat build-up and high temperature reinforcibility comprises specified amounts of particular surface-treated carbon black, silica and particular silane coupling agent based on 100 parts by weight of rubber ingredient.
    Type: Grant
    Filed: April 25, 1988
    Date of Patent: April 11, 1989
    Assignee: Bridgestone Corporation
    Inventors: Michitaka Takeshita, Uchu Mukai, Toshio Sugawara
  • Patent number: 4818778
    Abstract: A process is disclosed for stabilization of natural rubber against oxidative degradation by incorporating therein phenolic derivatives of 3-hydroxymethyl-5-hydroxymethylthio-1,3,4-thiadiazolidine-2-thione and stabilized rubber compositions thereof.
    Type: Grant
    Filed: December 7, 1987
    Date of Patent: April 4, 1989
    Assignee: R. T. Vanderbilt Company, Inc.
    Inventor: Lester A. Doe, Jr.
  • Patent number: 4788008
    Abstract: A latex copolymer composition is produced having good flame retardancy. The copolymer is typically made from vinylidene chloride monomers, conjugated diene monomers, vinyl substituted aromatic monomers, and functional monomers such as unsaturated mono or dicarboxylic acids. Through the use of flame retardant agents such as halogenated waxes, metallic salts, and the like, the pliability or softness, as well as the strength of the copolymer composition, can be controlled. Flexibilizing agents can optionally be utilized to abate cracking, especially after heat aging. The composition can optionally be pigmented. The flame retardant latex composition can be utilized as coatings on various substrates such as mats, fibers, and the like.
    Type: Grant
    Filed: April 6, 1987
    Date of Patent: November 29, 1988
    Assignee: GenCorp Inc.
    Inventor: Terry C. Neubert
  • Patent number: 4788231
    Abstract: A process for preparing a pourable powdered rubber containing filler, comprising preparing a blend by mixing a portion of said filler to be incorporated in said rubber product with 0.1 to 6.5 phr of a water-soluble salt of a Group IIa, IIb, IIIa or VIII metal of the Periodic Table and a rubber latex or aqueous emulsion of a rubber solution, adjusting the pH of the blend to a pH ranging from 3.2 to 8.6 by addition of an acid, adding the remaining amount of filler to the pH adjusted blend, separating the rubber containing filler from the aqueous phase of the blend, and drying the powdered rubber product obtained.
    Type: Grant
    Filed: April 5, 1988
    Date of Patent: November 29, 1988
    Assignee: Huls Aktiengesellschaft
    Inventors: Hans-Jurgen Smigerski, Uwe Ernst
  • Patent number: 4786677
    Abstract: A rubber composition comprising 35 to 100 parts by weight of a carbon black per 100 parts by weight of a rubber component, the carbon black having a nitrogen adsorption specific surface area (N.sub.2 SA) within a range of 70 to 185 m.sup.2 /g and an aggregate characteristic which shows a first and a second modal diameters in the aggregate equivalent Stokes diameter distribution and has a difference between the two modal diameters L (nm) to be calculated from the following equation (1) which satisfies the following formula (2):L=Dst.sub.2 -Dst.sub.1 (1)20.ltoreq.L.ltoreq.110-0.3 (N.sub.2 SA) (2)wherein Dst.sub.1 and Dst.sub.2 respectively denote the first modal diameter (nm) and the second modal diameter (nm) in the aggregate equivalent Stokes diameter distribution detetermined by a centrifugal classification method.
    Type: Grant
    Filed: December 2, 1987
    Date of Patent: November 22, 1988
    Assignee: The Tokai Carbon Co., Ltd.
    Inventors: Kiyonari Nakai, Masahiko Mito
  • Patent number: 4781781
    Abstract: A solid flexible polymeric material is formed by solidifying a water-based latex which contains an inorganic filler. The filler is sand and this may be stabilized in the latex with xanthan gum. The solid material may be a foamed or non-foamed layer which may be used as integral carpet backing, as carpet underlay, or as an adhesive for bonding a reinforcing fabric to the back of carpeting.
    Type: Grant
    Filed: August 27, 1987
    Date of Patent: November 1, 1988
    Inventor: Gerald Hallworth
  • Patent number: 4777204
    Abstract: A resin composition is suitable for molding to a gear and comprises 30 to 98 percent by weight of a resin being capable of the anisotropic phase in the molten state and the melt processing and 2 to 70 percent by weight of fibers such as metal fibers, carbon fibers, glass fibers, inorganic fibers, synthetic fibers and mineral fibers.
    Type: Grant
    Filed: June 22, 1987
    Date of Patent: October 11, 1988
    Assignee: Polyplastics Co., Ltd.
    Inventors: Yukio Ikenaga, Katsuhiko Takahashi, Kenji Hijikata, Toshio Kanoe, Tsuneyoshi Okada
  • Patent number: 4753976
    Abstract: The rubber composition without formulating a carbon black filler has a remarkably low Mooney viscosity and still is capable of giving a rubber vulcanizate having excellent mechanical properties. The rubber composition comprises, in addition to natural rubber or a diene-based synthetic rubber and a non-carbon inorganic filler, a specific poly(dialkoxysiloxane) terminated at each molecular chain end with a polysulfide linkage-containing group of the formula (RO).sub.3 Si--R.sup.1 --S.sub.x -- R.sup.1 --bonded to the terminal silicon atom, in which R is an alkyl group, e.g. methyl and ethyl, R.sup.1 is a divalent hydrocarbon group, e.g. --CH.sub.2 CH.sub.2 CH.sub.2 13 , and x is a positive integer of 2 to 6 or, typically, 4.
    Type: Grant
    Filed: August 22, 1986
    Date of Patent: June 28, 1988
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Hiroshi Yoshioka, Ichiro Ono, Hitoshi Uehara
  • Patent number: 4737542
    Abstract: An improved vulcanizing composition including sulfur and a dispersing agent which is useful for improving the dispersibility of sulphur used in vulcanizing rubber including an effective amount of rubber in combination with a rubber processing oil. A method for preparation of the improved vulcanizing composition includes combining a rubber processing oil and an effective amount of rubber to produce a dispersing agent containing about 0.1-30% rubber by total weight of the dispersing agent, and mixing the dispersing agent and sulphur, optionally in the presence of a solvent which is subsequently removed, to produce an improved vulcanizing compound.
    Type: Grant
    Filed: November 7, 1986
    Date of Patent: April 12, 1988
    Assignee: Sanshin Kagaku Kogyo Co., Ltd.
    Inventors: Tatsuo Kifune, Takeharu Ito
  • Patent number: 4722954
    Abstract: A solid flexible polymeric material is formed by solidifying a water-based latex which contains an inorganic filler. The filler is sand and this may be stabilized in the latex with xanthan gum. The solid material may be a formed or non-foamed layer which may be used as integral carpet backing, as carpet underlay, or as an adhesive for bonding a reinforcing fabric to the back of carpeting.
    Type: Grant
    Filed: February 12, 1986
    Date of Patent: February 2, 1988
    Inventor: Gerald Hallworth
  • Patent number: 4721740
    Abstract: A dispersion improved carbon black compounded rubber composition comprises a rubber component and a reinforcing carbon black in an amount of from 30 to 150 parts by weight with respect to 100 parts by weight of the rubber component. The rubber component is selected from a group consisting of a natural rubber, synthetic isoprene rubber and a mixture thereof, or a blend of this rubber component with a diene base synthetic rubber other than this rubber component. The reinforcing carbon black has a specific surface area of from 70 to 200 m.sup.2 /g when measured by a nitrogen adsorption method and a DBP value of from 80 to 130 ml/100 g, and is obtained by introducing mainly phenolic hydroxide groups into the surface of the carbon black through plasma treatment at low temperatures or by introducing carboxyl groups and the phenolic hydroxide groups thereinto through plasma treating at low temperatures and neutralizing the thus introduced acid groups.
    Type: Grant
    Filed: July 8, 1986
    Date of Patent: January 26, 1988
    Assignee: Bridgestone Corporation
    Inventors: Michitaka Takeshita, Mitsuo Kiboku, Seishiro Ito, Tatsuhiko Ihara
  • Patent number: 4720514
    Abstract: Resinous pigment concentrates comprising at least one pigment and a dispersing additive of a naphthenic extender oil and/or a phosphate ester blended with a major portion of a resinous polymer containing a significant proportion of at least one polymerized conjugated diene monomer, when used for coloring resinous polymers as described, are effective in reducing such defects in finished articles as gels and surface blemishes.
    Type: Grant
    Filed: February 13, 1986
    Date of Patent: January 19, 1988
    Assignee: Phillips Petroleum Company
    Inventor: Donald G. Needham
  • Patent number: 4701492
    Abstract: Elastomer/filler interface agents for filled vulcanizable matrices, e.g., natural or synthetic rubber, comprise the amido reaction products of tetraethylene pentamine ("TEPA") with amide-forming organosulfur compounds.
    Type: Grant
    Filed: October 15, 1985
    Date of Patent: October 20, 1987
    Assignee: Rhone-Poulenc Chimie de Base
    Inventors: Joel Le Ludec, Jean Machurat, Jean-Claude Morawski, Gerard Soula
  • Patent number: 4678830
    Abstract: A rubber composition composed of natural rubber alone or a blend rubber consisting of natural rubber and not more than 50% by weight of at least one kind of a diene base synthetic rubber, and containing carbon black satisfying the following relations in an amount from 35 to 55 parts by weight with respect to 100 parts of the rubber component:(a) Nitrogen adsorption specific surface area (N.sub.2 SA) is from 115 to 135 m.sup.2 /g.(b) The strength (.DELTA.DBP) of the agglomerates defined by the following formula is not more than 18 ml/100 g..DELTA.DBP(ml/100 g)=DBP-24M4DBP(c) An oil adsorption at 24M4DBP is from 95 to 110 ml/100 g.(d) A ratio of the nitrogen adsorbing specific surface area (N.sub.2 SA) (m.sup.2 /g) to iodine adsorbing specific surface area (IA) (mg/g) is from 1.05 to 1.20.
    Type: Grant
    Filed: February 4, 1986
    Date of Patent: July 7, 1987
    Assignee: Bridgestone Corporation
    Inventors: Susumu Sato, Keizo Okamoto