Abstract: A vulcanizable nitrile rubber composition comprising 100 parts by weight of a nitrile rubber, 0.1 to 20 parts by weight of a metal silicate and 0.1 to 10 parts by weight of a vulcanizing agent. Vulcanization of this vulcanizable rubber composition gives a vulcanizate exhibiting enhanced heating aging resistance when it is kept in a hot air atmosphere, especially at a high temperature.

Abstract: According to the present invention, there is provided a low dielectric loss tangent resin composition containing a crosslinking component having a weight average molecular weight of not more than 1,000 and a plurality of styrene groups and represented by the formula [1], wherein R is a hydrocarbon skeleton which may have a substituent, R1 is hydrogen, methyl or ethyl, m is an integer of 1-4 and n is an integer of 2 or more, and further containing at least one member selected from a high polymer having a weight average molecular weight of not less than 5,000 and a filler, which resin composition can give a cured product having a good flexibility, high tensile strength and low dielectric constant and dielectric loss tangent.

Abstract: A seal ring with a sliding surface, which is obtained by molding a molding powder or granulated powder of non-melt-moldable modified polytetrafluoroethylene containing 0.01 to 1% by weight of a perfluorovinylether unit represented by the formula (I): —CF2—CF(—O—X)—??(I) wherein X represents a perfluoroalkyl group having 1 to 6 carbon atoms or a perfluoroalkoxyalkyl group having 2 to 9 carbon atoms, the modified polytetrafluoroethylene having a heat of crystallization of 18 to 25J/g measured by a differential scanning calorimeter.

Abstract: The present invention provides a fluoropolymer that is melt-processible and thermoplastic and that has a melting point between 100° C. and 320° C. The fluoropolymer is derived from (a) one or more gaseous fluorinated monomers, (b) one or more modifiers selected from (i) olefins having a bromine or iodine atom bonded to a carbon of the double bond of the olefin, (ii) olefins corresponding to formula (I): Xa2C?CXa—Rf—Br??(I) wherein each Xa independently represents hydrogen, fluorine, bromine, chlorine or iodine, Rf is a perfluoroalkylene group, typically having 1 to 8 carbon atoms, a perfluorooxyalkylene group or a perfluoropolyether group and (iii) mixtures thereof; and (c) optionally one or more comonomers selected from non-gaseous fluorinated monomers and non-fluorinated monomers. The resulting fluoropolymer has long chain branches. The invention further provides a method for making these polymers.

Abstract: According to one aspect of the invention, a structure and method for providing improved thermal conductivity of a thermal interface material (TIM) made of phase changed polymer matrix and a fusible filler material is disclosed. The TIM may also have a non-fusible filler material and a percentage of a non-phase change polymer added to the phase change polymer matrix. The TIM, used to mate and conduct heat between two or more components, can be highly filled systems in a polymeric matrix where the fillers are thermally more conductive than the polymer matrix.

Abstract: Non-stick coatings for use on a flexible substrate include a fluoropolymer, an acrylic polymer, and a polyol and/or diol. The ratio of acrylic polymer to polyol and/or diol is between about 90:10 and about 10:90 by weight, preferably about 50:50. The ratio of acrylic polymer and polyol or diol to fluoropolymer is preferably about 100:60 by weight.

Abstract: A composition and method for making a fluoroelastomer is disclosed. The composition comprises a fluoroelastomer containing chlorine and an organic compound containing at least an hydride function. The hydride function has the formula MH where M is Si, Ge, Sn or Pb.

Abstract: A crosslinkable fluororubber composition comprising (A) a liquid perfluoro compound having alkenyl groups and a divalent perfluorolakylene or perfluoropolyether structure, (B) a reinforcing filler, (C) a surface treating agent having a fluoroalkyl or fluoropolyalkyl ether group and a silanol group, (D) an addition reactive compound having hydrosilyl groups, and (E) a hydrosilyl or peroxide crosslinker is prepared by mixing components (A) to (C) to form a liquid or paste composition, adding component (D) thereto to form a millable composition, and mixing component (E) therewith. The composition is effectively roll workable and cures into products having excellent physical properties.

Abstract: The present invention is aimed to provide polyether polymers capable of improving an ion conductivity around room temperature as well as ion conductible polymer compositions and electrochemical devices using the same. The above objectives are achieved by using polyether polymers characterized by having the structure unit represented by the formula (1) and the structure unit represented by the formula (2) and/or the structure unit represented by the formula (3), and having polymerizable and/or non-polymerizable functional groups at each end of the molecular chains.

Abstract: Functional fluoro-monomers are polymerized with an organoborane initiator to yield functional fluoro-polymers and copolymers including functional polymers prepared from monomers having allylic protons, Si—H groups, and olefinic groups.

Abstract: A novel fluoropolymer which can be an optical resin material having a low refractive index and excellent heat resistance, and a novel fluorinated diene compound having two unsaturated bonds, capable of presenting such a fluoropolymer, are presented. Further, by virtue of the low refractive index and excellent heat resistance, the polymer presents a high performance optical transmitter and a plastic optical fiber. A fluorinated diene compound represented by CF2?CFCF(ORf)CF2OCF?CF2 (wherein Rf is a perfluoroalkyl group such as a trifluoromethyl group), and a fluoropolymer thereof. Further, an optical transmitter made by using such a fluoropolymer, and a plastic optical fiber having a core comprising such a fluoropolymer and a fluorinated low molecular weight compound contained therein as a refractive index-increasing agent.

Abstract: PTFE pellets with good bulk density, homogeneity, and flowability properties may be obtained by: (1) wetting a PTFE powder with a solvent, to obtain a wetted PTFE powder; (2) forming the wetted PTFE powder into agglomerated pellets of PTFE; and (3) drying the agglomerated pellets of PTFE pellets, in which the drying of the agglomerated pellets of PTFE is carried out in a fluidized bed drier. The PTFE pellets so obtained may be used to prepare molded articles of PTFE.

Abstract: An organically modified layered clay ionically bonded with an organic compound having an ammonium group and an amino group, an organic polymer composition containing the same and an organic polymer capable of reacting with the amino group, and an inner liner using the same.

Abstract: A process aid masterbatch comprising a) 0.05 to 25 weight percent fluoropolymer; b) 0.2 to 10 weight percent of an organic soap selected from the group consisting of carboxylic acids having from 6 to 34 carbon atoms; salts thereof; hydrocarbon sulfonates having from 6 to 34 carbon atoms; and salts thereof; c) at least 5 weight percent mineral particulate; and d) a non-fluorinated melt-processable polymer improves the extrusion processability of non-fluorinated melt-processable polymers.

Abstract: Provided is a curable coating composition comprising a reactive compound having one or more structures of the formula: wherein X is a primary carbamate group, Y is a hydroxy or halide group, n is an integer of 2 or more, n? is an integer of 1 or more, and R0, R1, R2, R3, R4 and R5 may be H or a group selected from alkyl groups, aliphatic groups, cycloaliphatic groups, aromatic groups and mixtures thereof, with the provisos that at least one R1 or R2 group is selected from the group consisting of aliphatic groups, cycloaliphatic groups, aromatic groups, and mixtures thereof, and in substantially all structures primary carbamate group X is attached to a carbon atom having a lower degree of substitution than a carbon atom to which functional group Y is attached.

Abstract: The present invention relates to tires suitable for bearing heavy loads, and to the use of a rubber composition to form the treads of such tires which delays the appearance of irregular wear on the treads of such tires during travel. The invention applies to tires for motor vehicles, such as heavy vehicles, construction vehicles or aircraft. The rubber composition comprises: an elastomeric matrix comprising majoritarily at least one diene elastomer having at one or more of its chain ends a functional group which is active for coupling to a reinforcing white filler, a reinforcing filler comprising at least 50% by weight a reinforcing white filler, and a reinforcing white filler/functionalized diene elastomer bonding agent. The present invention relates to tires suitable for bearing heavy loads, and to the use of the rubber composition to delay the appearance of irregular wear on the treads of such tires during travel.

Abstract: Water-continuous emulsion of curable elastomeric polymers are disclosed having a solids content of greater than 75%, an average particle size less than 5 ?m, and having sufficient stability to produce a stable lower solids emulsion upon dilution with water comprising; a curable elastomeric polymer, surfactant, internal cure additive, water, optional plasticizer, and optional low molecular weight acid. The water-continuous emulsions of curable elastomeric polymers can be prepared by; (I) forming a premix comprising an elastomeric polymer, surfactant, and internal cure additive, and (II) adding water to the premix with mixing to form a water continuous emulsion of the curable elastomeric polymer having a solids content of greater than 75%, an average particle size less than 5 ?m, and having sufficient stability to produce a stable lower solids emulsion upon dilution with water.

Abstract: Provided is an aqueous water- and oil-repellent dispersion free of an organic solvent and having durable water- and oil-repellency and excellent storage stability. The aqueous water- and oil-repellent dispersion is produced by emulsifying a perfluoroalkyl group-containing (meth)acrylate copolymer with the use of an ionic surfactant and/or a nonionic surfactant having less than 8 mol of added ethylene oxide per one hydrophobic group so that an average particle diameter is at most 100 nm and an integrating sphere turbidity is at most 20 (kaolin); adding, before the polymerization, a surfactant having at least 8 mol of added ethylene oxide per one hydrophobic group and a protective colloid; and conducting the polymerization.

Abstract: A resin varnish for printing ink is produced by condensing phenol and formaldehyde in an ink solvent to obtain an ink solvent solution of resole initial condensate, after which the resole initial condensate and a rosin ester containing 30-60 wt % non-aromatic conjugate resin acid and 20-60 wt % aromatic resin acid are reacted at 100-250° C. in a system containing ink solvent or in a system containing ink solvent and drying oil. A high-viscosity, high-molecular-weight ink resin is produced efficiently by reacting, with resole initial condensate in ink solvent, a rosin ester containing specified contents by percentage of conjugate acid and aromatic resin acid. The resin varnish obtained has very few decomposition components and nonuniformly gelled components, so it also is suitable for screen printing ink and letterpress printing ink, in addition to offset printing ink.

Abstract: A fullerene-based proton conductor including a proton conductive functional group connected to the fullerene by an at least partially fluorinated spacer molecule. Also, a polymer including at least two of the proton conductors that are connected by a linking molecule. Further, an electrochemical device employing the polymer as a proton exchange membrane, whereby the device is able to achieve a self-humidifying characteristic.