Abstract:
A rubber/short fiber master batch obtained by stirring and mixing an aqueous dispersion of short fibers having an average diameter of less than 0.5 μm and a rubber latex, followed by removing the water from the mixture and a practical production method of the same and a pneumatic tire using the master batch.
Abstract:
A pneumatic tire having an air permeation preventive layer comprising (A) a thin film of at least one aliphatic polyamide resin wherein at least part of the amide groups thereof are modified with alkoxyalkyl groups, (B) a thin film obtained from the curing a liquid composition containing (i) a multi component copolymer polyamide resin, (ii) a curable resin, and (iii) a curing agent for curing the curable resin, (C) a thin film obtained by coating and cross-linking a polymer composition containing (i) at least-one aliphatic polyamide resin wherein at least part of the amide groups thereof are modified with alkoxyalkyl groups and/or groups having curable unsaturated bonds and (ii) at least one cross-linking agent and/or curable resin other than an acid, or (D) a thin film of a vinylidene chloride-acrylonitrile copolymer obtained by copolymerizing 5 to 50 molar % of acrylonitrile.
Abstract:
A pneumatic tire having an air permeation preventive layer comprising (A) a thin film of at least one aliphatic polyamide resin wherein at least part of the amide groups thereof are modified with alkoxyalkyl groups, (B) a thin film obtained from the curing a liquid composition containing (i) a multi component copolymer polyamide resin, (ii) a curable resin, and (iii) a curing agent for curing the curable resin, (C) a thin film obtained by coating and cross-linking a polymer composition containing (i) at least one aliphatic polyamide resin wherein at least part of the amide groups thereof are modified with alkoxyalkyl groups and/or groups having curable unsaturated bonds and (ii) at least one cross-linking agent and/or curable resin other than an acid, or (D) a thin film of a vinylidene chloride-acrylonitrile copolymer obtained by copolymerizing 5 to 50 molar % of acrylonitrile.
Abstract:
A self-seal tire according to the present invention has a puncture sealing layer located all over a tire inner wall surface from one shoulder portion to the other shoulder portion of a pneumatic tire. The puncture sealing layer comprises at least one band-shape seal layer, which includes a band-shape sponge layer and a bonding layer, the band-shape sponge layer being impregnated with an adhesive so that it is exposed on a tier wall surface side face of the band-shape sponge layer and spaced apart from a tire counter wall surface side face thereof, and the bonding layer being made of adhesive and provided on the tire wall surface side face. The band-shape seal layer is bonded through the bonding layer on the tire inner wall surface with the band-shape seal layer being wound in a circumferential direction of the tire.
Abstract:
A UV-curable resin composition, which comprises blending urethane acrylate with tris(2-acryloxyethyl)isocyanurate, or with tris(2-acryloxyethyl)isocyanurate and with diacrylate, which composition has a low viscosity and a good drawing workability before curing and cures rapidly by ultraviolet radiation to give cured products having a high elastic modulus, a high elongation and a low water-absorption.
Abstract:
Provided is a run-flat support for pneumatic tire, which support is improved in durability while still achieving a lightweight. A run-flat support 1 is constituted of an annular shell 2, and elastic rings 3. In a lateral cross section of the annular shell 2, the annular shell 2 has: an outer circumferential side formed in a plurality of convex support potions 2a each bulging outward, and a concave linking portion 2b linking the convex supporting portions 2a; and a pair of right and left leg portions 2c extending radially inward respectively from the supporting portions 2a on the corresponding sides in a bifurcating manner. The elastic rings are mounted respectively on ends of both leg portions of the annular shell 2. The body of the annular shell 2 is formed of metal or ceramics, and a fiber reinforced resin layer 4 is attached at least to an inner circumferential surface of the linking portion 2b, the fiber reinforced resin layer 4 including reinforcing long fibers which arranged to intersect with the circumferential direction.
Abstract:
A thermoplastic elastomer composition produced from a thermoplastic resin and rubber and having a dispersion phase formed of a rubber composition at least part of which is dynamically crosslinked in the continuous phase of the thermoplastic resin, insulating glass using the thermoplastic elastomer composition as a sealing material and spacer, a process for producing the insulating glass using a sealing material made from the thermoplastic elastomer composition, comprising the steps of inserting the leading end of a charging nozzle into a space between the peripheral portions of a plurality of glass sheets, discharging the sealing material from the leading end of the nozzle body at a predetermined rate, and moving the glass sheets or the nozzle body relative to each other to charge the sealing material made from the thermoplastic elastomer composition into the space between the peripheral portions of the glass sheets, and a nozzle used in this process.
Abstract:
A polymer composition for a tire having an air permeation coefficient of 25.times.10.sup.-12 cc.multidot.cm/cm.sup.2 .multidot.sec.multidot.cmHg (at 30.degree. C.) or less and a Young's modulus of 1 to 500 MPa, including (A) at least 10% by weight, based on the weight of the total polymer component, of at least one thermoplastic resin having an air permeation coefficient of not more than 25.times.10.sup.-12 cc.multidot.cm/cm.sup.2 .multidot.sec.multidot.cmHg (at 30.degree. C.) and a Young's modulus of more than 500 MPa and (B) at least 10% by weight, based on the total weight of the polymer component, of at least one elastomer component having an air permeation coefficient of more than 25.times.10.sup.-12 cc.multidot.cm/cm.sup.2 .multidot.sec.multidot.cmHg (at 30.degree. C.) and a Young's modulus of not more than 500 MPa, wherein the total amount (A)+(B) of the component (A) and the component (B) is not less than 30% by weight based on the weight of the total polymer component, and a pneumatic tire obtained therefrom.
Abstract:
A self-sealing tire according to the present invention includes a pneumatic tire and a puncture sealing layer disposed over a whole tire inner wall surface from one shoulder portion to the other shoulder portion of the pneumatic tire. The puncture sealing layer comprises an annular sponge layer which is impregnated with an adhesive so as to be exposed on a radially outer surface side thereof, and a bonding layer of an adhesive which is provided on a radially outer surface of the sponge layer and is adhered to the tire inner wall surface. The sponge layer is provided in a compressed state. The puncture sealing layer is press attached to the tire inner wall surface by a recovery force of the compressed sponge layer.
Abstract:
A pneumatic tire having an air permeation preventive layer comprising a low permeability thermoplastic elastomer composition comprising a thermoplastic elastomer having a thermoplastic resin composition as a continuous phase and a rubber composition as a dispersed phase, in which a barrier resin composition is contained, which low permeability thermoplastic elastomer composition has a phase structure in which the barrier resin composition is dispersed in the form of a flat state in the thermoplastic elastomer, is abundant in flexibility, is superior in gas permeation preventive property, and enables the tire to be reduced in weight.