Kawasaki, Japan
Kawasaki, Japan

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Patent
The Yokohama Rubber Company | Date: 2016-05-18

Provided is a curable resin composition that can provide a cured product having good transparency and being capable of suppressing occurrence of spots. This curable resin composition contains a silicon-containing compound (A) having a silanol group and an aryl group, a silicon-containing compound (B) having at least two silicon atom-bonded hydrogen atoms and at least one aryl group in one molecule, a branched-chain organopolysiloxane (C) having an alkenyl group and an aryl group, and a hydrosilylation reaction catalyst (D).


An elastomer composition, having an excellent flexibility and low temperature durability, a method for producing the same and a pneumatic tire using the same are provided. An elastomer composition (C) comprising a matrix of a thermoplastic resin (A), in which a dispersed phase of an elastomer component (B) is finely dispersed to form an island-in-sea structure, wherein volume ratios of the thermoplastic resin (A) and the elastomer component (B) satisfy the following formula (I): d/m>d/m (I) wherein d and d, respectively, indicate a volume ratio and a melt viscosity of the elastomer component (B), and m and m, respectively, indicate a volume ratio and a melt viscosity of the thermoplastic resin (A)), a method for producing the same and a pneumatic tire using the same.


Patent
The Yokohama Rubber Co. | Date: 2016-06-01

A process for producing a thermoplastic resin composition in which the continuous phase comprises an ethylene/vinyl alcohol copolymer (A) and a polyamide resin (B) and the dispersed phase comprises an acid-modified polyolefin elastomer (C), the process being characterized by comprising: step (I) in which an ethylene/vinyl alcohol copolymer (A) and an acid-modified polyolefin elastomer (C) are kneaded to form a mixture in which the acid-modified polyolefin elastomer (C) has been dispersed in the ethylene/vinyl alcohol copolymer (A); step (II) in which a polyamide resin (B) is subsequently added to the mixture obtained in step (I), and the resultant mixture is further kneaded; and step (III) in which a terminal-blocking agent (D) for the polyamide resin (B) is subsequently added to the mixture obtained in step (II) in an amount of 0.1-5 parts by mass per 100 parts by mass of the polyamide resin (B), and the resultant mixture is melt-kneaded at a temperature not lower than the melting point of the polyamide resin (B).


Patent
The Yokohama Rubber Co. | Date: 2016-12-14

To provide a pneumatic tire by which uneven wear resistance can be increased and the formation of cracks and/or fractures in the ribs can be effectively prevented. This pneumatic tire comprises a tread portion, sidewall portions, and bead portions, wherein the tread portion includes five main grooves extending in the tire circumferential direction that partition six rows of ribs, a plurality of first sipes is formed in each edge portion of center ribs, intermediate ribs, and shoulder ribs, a plurality of first narrow grooves is formed in each of the center ribs and the intermediate ribs so as to form a connection between the main grooves, a plurality of second narrow grooves is formed in each of the center ribs and the intermediate ribs so as to connect the first narrow grooves, an interval Pg_(1) of the first narrow groove is from 20 mm to 60 mm, an interval Ps_(1) of the first sipe is from 15% to 45% of the interval Pg_(1) of the first narrow groove, a ratio Wa/TDW of a width Wa of the center ribs to a tread portion development width TDW is from 0.08 to 0.18, a ratio Wb/TDW of a width Wb of the intermediate ribs to the tread portion development width TDW is from 0.08 to 0.18, and a ratio Wc/Wa of a width Wc of the shoulder ribs to the width Wa of the center ribs is from 1.20 to 1.30.


Patent
The Yokohama Rubber Co. | Date: 2016-02-17

Provided are a marine hose and an airbag device for a marine hose able to prevent sinking of a marine hose line to the bottom of a body of water due to a decrease over time in buoyancy, while preventing an increase in diameter and decrease in flexibility of a main hose body. An airbag device 8 including a water pressure sensor 9, a folded bag float 10 attached to the outer surface of the marine hose 1, and an inflation device 11 for introducing air into the bag float 10, is used, wherein the water pressure sensor 9 activates the inflation device 11 to inflate the folded bag float 10 when the water pressure sensor 9 detects that a preset water pressure value has been reached, the buoyancy provided by the inflated bag float 10 preventing further sinking of the marine hose 1.


Patent
The Yokohama Rubber Company | Date: 2016-08-10

Provided is an aircraft interior panel material and a manufacturing method thereof whereby requirements of cost reduction, strength, rigidity, flame retardancy, weight reduction are satisfied and environmental impact is reduced. The aircraft interior panel material (10A) includes a core member (12), and surface members (14) attached to both surfaces of the core member (12). The core member (12) includes a plate member (12A) composed of balsa wood and having a rectangular shape and uniform thickness. Both surfaces of the plate member (12A) in the thickness direction are flat surfaces. Balsa wood is a light weight natural material whereby environmental impact can be reduced. Both surfaces of the plate member (12A) in the thickness direction are impregnated with flame retardant (18), which reduces the flammability of the balsa wood. Impregnation of the plate member (12A) with the flame retardant (18) may be performed by: spraying the flame retardant (18); by immersing the plate member (12A) in the flame retardant (18); or upon the plate member (12A) being immersed in the flame retardant (18), by applying a pressure larger than the pressure at the depth where the plate member (12A) is immersed or cycles thereof to the plate member (12A).


Patent
The Yokohama Rubber Co. | Date: 2016-08-31

An object of the present invention is to have high strength in the region around a tank port in a cylinder, reduce component cost, increase work efficiency, and reduce weight. A tank port (18) includes a reinforcing sheet (28), an inner member (30), and an outer member (32). The reinforcing sheet (28) is attached around a through-hole (1202) on the outer peripheral surface of a cylinder (12). The inner member (30) includes an inner fitting plate portion (3004) attached to the inner peripheral surface of the cylinder (12) and an inner cylindrical portion (3002) inserted into the through-hole (1202). The outer member (32) includes an outer cylindrical portion (3202) attached to the outer peripheral surface of the inner cylindrical portion (3002) protruding from an opening (2802) and an outer fitting plate portion (3204) attached around the opening (2802) of the reinforcing sheet (28). The entire periphery of the through-hole (1202) of the cylinder (12) is reinforced by being disposed between the inner fitting plate portion (3004) and the reinforcing sheet (28).


Patent
The Yokohama Rubber Company | Date: 2016-10-05

The present invention provides a sealing material composition which can produce a sealing material having a high durability against UV, heat and humidity as well as having excellent adhesive strength, and a composite glass. A sealing material composition of the present invention comprises: (A) a polymer having two or more thiol groups in a molecule at not less than 10 mass% and not more than 50 mass%; (B) an epoxy-silane coupling agent at not less than 0.05 mass% and not more than 5 mass %; (C) an amino-silane coupling agent at not less than 0.05 mass% and not more than 5 mass%; and (D) a metal oxide at not less than 1 mass% and not more than 10 mass%.


Patent
The Yokohama Rubber Co. | Date: 2016-06-08

A thermoplastic resin composition including a matrix phase and a dispersion phase, the thermoplastic resin composition characterized in that the matrix phase includes (A1) at least one type of polyamide resin having a melting point of 170-210C, (A2) at least one type of polyamide resin having a melting point of 210-265C, and (B) at least one type of ethylene-vinyl alcohol copolymer, the dispersion phase includes (C) at least one type of acid-modified elastomer, the amount of the acid-modified elastomer (C) is 100-240 parts by mass with respect to a total of 100 parts by mass of the polyamide resins (A1) and (A2) and the ethylene-vinyl alcohol copolymer (B), the amount of the polyamide resin (A2) is 20-40 mass% based on the total mass of the polyamide resin (A1), the polyamide resin (A2), and the ethylene-vinyl alcohol copolymer (B), and the total amount of the polyamide resin (A1) and the polyamide resin (A2) is 35-70 mass% based on the total mass of the polyamide resin (A1), the polyamide resin (A2), and the ethylene-vinyl alcohol copolymer (B).


Patent
The Yokohama Rubber Co. | Date: 2016-06-01

Provided is a stud pin fitted into a pneumatic tire that maintains the performance on ice of the pneumatic tire and that does not easily fall out. Also provided is a pneumatic tire fitted with the stud pin. The stud pin fitted into a tread portion of a pneumatic tire comprises a buried base portion extending in a direction, the buried base portion securing the stud pin in the tread portion by being pressed by a side surface of the stud pin installation hole upon the stud pin being embedded in the stud pin installation hole, and a tip portion connected to an end portion of the buried base portion in the extending direction, the tip portion protruding past the tread portion and coming into contact with a road surface upon the buried base portion being embedded in the stud pin installation hole. The tip portion comprises a tip end surface perpendicular to the extending direction of the buried base portion, and a connection portion of the tip portion with the buried base portion has a cross-sectional area in a plane orthogonal to the extending direction of the buried base portion greater than an area of the tip end surface. The stud pin is fitted into the tread portion of the pneumatic tire.

Loading The Yokohama Rubber Co. collaborators
Loading The Yokohama Rubber Co. collaborators