Japan Synthetic Rubber Co., Ltd.

Teizo Kotani

Kozo Arai

Yasuhiko Takemura

Hiroji Enyo

Toshio Miyabayashi

Masaki Nagata

Shiomi Fukui

Kazuo Suzuki

Takashi Inoue

Minoru Tanaka

Toshio Teramoto

Shuichi Matsumoto

Katsutoshi Igarashi

Yoshio Matsumura

Noriaki Ijuin

Masaaki Watanabe

Masaki Nagato

Naoshi Yasuta

Toshio Mizushima

A process for treating an acetylene polymer or a doped acetylene polymer, which comprises plasma-polymerizing a gasifiable organic compound under plasma-excitation under reduced pressure, thereby forming a polymer film on the solid surface of an acetylene polymer or a doped acetylene polymer placed in said polymerization reaction system. This process can prevent the acetylene polymer or doped acetylene polymer from being deteriorated owing to oxidation.

Process for treating acetylene polymer or doped acetylene polymer

A heat-aging-resistant rubbery polymer composition comprising a rubbery polymer, at least one compound selected from the group consisting of diphenylamine derivatives and phenol derivatives as an age resister for said rubbery polymer, and polyalkylene ether glycol having an average molecular weight of 100-5,000, and optionally a compound represented by the formula, ##STR1## in which R is alkyl having 10 to 20 carbon atoms. Preferably, said at least one compound selected from the group consisting of diphenylamine derivatives and phenol derivatives is chemically linked to said rubbery polymer as a part of the molecular chain. Said rubbery polymer composition is unexpectedly superior in heat-aging-resistance to a composition consisting only of said rubbery polymer and said age resister or a composition consisting only of said rubbery polymer and said polyalkylene ether glycol.

Heat-aging-resistant rubber composition

A rubbery polymer composition comprising (A) a copolymer consisting of 45 to 79% by weight of butadiene, 20 to 55% by weight of acrylonitrile and 0.1 to 10% by weight of at least one compound selected from the group consisting of amide compounds having the formula (I) shown below and imide compounds having the formula (II) shown below, and (B) a vinyl chloride polymer, the weight proportion of said (A) to said (B) being 95-40 to 5-60. Said composition is resistant to ozone and oil, and moreover, is excellent in heat aging resistance and sour gasoline resistance when used in an oil, in a solvent or in the atmosphere at a high temperature: ##STR1## wherein R.sub.1 and R.sub.2 individually represent hydrogen, chlorine, bromine, or alkyl having 1 to 12 carbon atoms; R.sub.3 represents hydrogen, or alkyl having 1 to 4 carbon atoms; and R.sub.4 represents hydrogen, alkyl having 1 to 4 carbon atoms, or aryl having 6 to 12 carbon atoms, ##STR2## wherein R.sub.1, R.sub.2 and R.sub.3 are as defined above, and two R's may be the same or different.

Rubbery polymer blends with anilino phenyl units

By reacting a diene polymer having nitrile groups with an anti-deteriorating agent having at least one polar group selected from the group consisting of amino group and imino group in the presence of a catalyst, a diene rubber can be obtained in which said anti-deteriorating agent is chemically combined to the nitrile groups. Said rubber per se has resistance to deterioration and, at the same time, acts as an anti-deteriorating agent for other diene rubbers. The chemically combined anti-deteriorating agent is not extractable with solvent, so that said rubber has a stable resistance to deterioration and a stable anti-deteriorating action on other diene rubbers.

Diene rubber having anti-deteriorating function and process for

An instant-setting adhesive composition comprising a 2-cyanoacrylate and at least one 1,1-disubstituted diene, the amount of said 1,1-disubstituted diene exceeding 50% by weight based on the total weight of both components. This composition is useful in the same fields as those where conventional 2-cyanoacrylate adhesives have been used, and is excellent in impact resistance, peel resistance, heat resistance and water resistance.

Instant-setting adhesive composition

A pressure sensitive conductor consists essentially of (I) an electrically insulating rubber (excluding addition reaction type liquid silicone rubber), (II) 25 to 50% by volume of electrically conductive metal particles (preferably 40 to 200.mu. in particle size) and (III) 5 to 20% by volume of carbon black, and having a JIS A hardness of at least 40. Said conductor may optionally contain (IV) 0.1 to 5% by volume of a mono-, di- or trialkyl titanate. This pressure sensitive conductor has high mechanical strength, a rapid electrical response to deformations, a low hysteresis of the electrical resistance variation on application and release of pressure, and minimized change of the pressure-resistivity curve under repeated deformations.

Pressure sensitive conductor

A pressure sensitive conductor comprising an elastomer containing from 3 to 40% by volume of electrically conductive magnetic particles, which particles are dispersed in the elastomer so that high-sensitivity pressure sensitive conductor portions and insulator portions or low-sensitivity pressure sensitive conductor portions are both present therein. A method of manufacturing the pressure sensitive conductor comprises forming a sheet of a mixture containing electrically conductive magnetic particles in an elastomer, and subjecting the sheet to the action of magnetic fields before or during cross linking, thereby allowing the conductive magnetic particles to be uniformly dispersed in the sheet in a selected pattern.

Pressure sensitive conductor and method of manufacturing the same

Polymers or copolymers of norbornene derivatives can be produced by contacting in the presence or absence of an inert solvent at least one norbornene derivative substituted by at least one polar group selected from the group consisting of ester, ether, nitrile, amide, imide, acid anhydride, halogen, and silyl, or by at least one substituent having one of said polar groups; or a combination of said norbornene derivative with at least one member selected from the group consisting of cycloalkenes having no polar substituent and polymers having olefinic carbon-to-carbon double bonds; with a catalyst consisting essentially of (a) at least one coordination compound of W or Mo, the oxidation number of which is 2, 1 or 0, (b) at least one titanium tetrahalide and, if necessary, (c) at least one compound selected from the group consisting of componds having an electron-accepting .pi. bond, N-halogen-substituted cyclic acid imides, sulfides, sulfoxides and phosphines. The above-mentioned catalyst is more active, cheaper, and easier to handle than the conventional catalysts containing organoaluminum compounds.

Method for chain-opening polymerization of norbornene derivatives

A homopolymer or copolymer having extremely high weight-average molecular weight of about 3,000,000 to about 50,000,000 with a narrow molecular weight distribution is prepared by emulsion polymerization of at least one monomer of an aromatic alkenyl compound such as styrene, an .alpha.,.beta.-unsaturated carboxylic acid ester such as methyl methacrylate, or a conjugated diolefin such as butadiene or isoprene using an initiator consisting of (a) at least one peroxide of dialkyl peroxides and peroxy esters, and (b) at least one reducing agent such as alkyl primary amines, alkyl tertiary amines, polyalkylenepolyamines, alkylamino alcohols, and the like at a temperature of 0.degree. to 70.degree. C.

Process for preparing polymers having high molecular weight

A pressure sensitive conductor which is made by mixing a silicone rubber, electrically conductive metal particles, and at least one compound selected from the group consisting of monoalkyl, dialkyl, and trialkyl titanate compounds, molding, and curing the same. Where a monoalkyl titanate compound is used, filler-containing silicone rubber may preferably be used.

A method of measurement of relaxation phenomena, in which input signals representing a relaxation phenomenon are recorded at equal intervals for logarithmic values of time. A measuring device for relaxation phenomena which comprises a logarithmic time pulse oscillator for producing pulse signals at equal intervals for logarithmic values of time, and a recorder for recording input signals representing a relaxation phenomenon converted into an electrical quantity, which operates to perform recording each time a pulse signal is produced.

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Yokohama, Japan

Teizo Kotani