摘要:
The invention provides compositions of chloroprene rubbers having improved vibration-damping properties under low temperature conditions without deterioration of mechanical properties, permanent compression set and tension fatigue in the final product. The chloroprene rubbers of the invention contain a xanthogen-modified chloroprene rubber and/or a mercaptan-modified chloroprene rubber in an amount of 100 parts by mass, a carbon black having an average particle diameter of 70 mn to 600 mn and a DBP oil absorption (as determined by Absorption A method of JIS-K6221) of 15 ml/100 g in an amount of 15 to 150 parts by mass, and a plasticizer represented by the chemical formula R1COO—(CH2)8—COOR2 wherein R1 and R2 each represent an alkyl group having 1 to 7 carbons.
摘要:
Desired is a technology for improving the vibration-damping properties of a chloroprene rubber under low-temperature environment without deterioration of the mechanical properties, permanent compression set, and tension fatigue.Provided is a chloroprene rubber composition, comprising a chloroprene rubber at least containing a xanthogen-modified chloroprene rubber and/or a mercaptan-modified chloroprene rubber in an amount of 100 parts by mass, a carbon black having a number-average particle diameter of 70 nm to 600 nm and a DBP oil absorption, as determined by the Oil Absorption A method of JIS-K6221, of 15 ml/100 g to 60 ml/100 g in an amount of 15 to 150 parts by mass, and a plasticizer represented by the following Chemical Formula (1) in an amount of 3 to 30 parts by mass: [C.1] R1COO—(CH2)8—COOR2 (1) (wherein, R1 and R2 each represent an alkyl group having a carbon number of 1 to 7).
摘要:
To provide a chloroprene rubber composition with which a vulcanized rubber having further improved heat resistance without impairing mechanical properties, the compression set and the tension fatigue can be obtained, and a rubber member for an automobile, a hose, a rubber molded article and a rubber vibration insulator comprising the vulcanized rubber.A chloroprene rubber composition, which comprises 100 parts by mass of at least one chloroprene rubber selected from the group consisting of a xanthogen-modified chloroprene rubber and a mercaptan-modified chloroprene rubber, and from 15 to 200 parts by mass of carbon black having a number average particle size of from 70 nm to 600 nm and having a DBP oil absorption of from 15 ml/100 g to 60 ml/100 g by oil absorption method A of JIS K6221.
摘要:
To provide a chloroprene rubber composition with which a vulcanized rubber having further improved heat resistance without impairing mechanical properties, the compression set and the tension fatigue can be obtained, and a rubber member for an automobile, a hose, a rubber molded article and a rubber vibration insulator comprising the vulcanized rubber.A chloroprene rubber composition, which comprises 100 parts by mass of at least one chloroprene rubber selected from the group consisting of a xanthogen-modified chloroprene rubber and a mercaptan-modified chloroprene rubber, and from 15 to 200 parts by mass of carbon black having a number average particle size of from 70 nm to 600 nm and having a DBP oil absorption of from 15 ml/100 g to 60 ml/100 g by oil absorption method A of JIS K6221.
摘要:
When there is a short circuit failure between the gate and emitter of a main switching element such as an IGBT, the temperature of a turn-on gate resistor or turn-off gate resistor is detected by a thermistor, and a drive circuit is protected by turning off a turn-on gate drive switching element or a turn-off gate drive switching element. Furthermore, instead of detecting the temperature of the turn-on gate resistor or turn-off gate resistor, a thermistor is connected in series with the turn-on gate drive switching element or turn-off gate drive switching element, the resistance change corresponding to a change in temperature of the thermistor is detected, and the drive circuit is protected by turning off the turn-on gate drive switching element or turn-off gate drive switching element.
摘要:
Provided is a sulfur-modified chloroprene elastomer composition superior both in viscosity stability during storage and scorching resistance during processing and a blend and vulcanized article thereof. A sulfur-modified chloroprene elastomer composition, containing a thiuram compound in an amount of 1 to 2.5 mass % and having an organic acid content, as determined in accordance with JIS K6237, of 1.5 to 15 mass %, an ash content, as determined in accordance with JIS K6228, of 0.03 to 0.2 mass %, and a mass ratio of the organic acid content to the ash content (organic acid content/ash content) of 50 to 500, as they are so regulated by modification of the blending amount of the emulsifier.
摘要:
The present invention provides an acrylic rubber composition and its vulcanized product, having good vulcanization characteristics and an excellent balance between processability, mechanical properties of rubber and compression set.The acrylic rubber composition comprises a carboxyl group-containing acrylic rubber, a diazabicycloalkene compound, a polyamine compound, and a tertiary amine compound represented by the following formula (1): where each of R1, R2 and R3 is independently a substituent having at least one saturated aliphatic hydrocarbon or unsaturated aliphatic hydrocarbon having a linear structure, a branched structure or a cyclic structure, or benzyl group.
摘要:
In a multifunction product, it is determined whether a detachable expansion board for realizing an electronic watermark function has been mounted. When the expansion board has been mounted, a display concerning the electronic watermark function is automatically displayed on an operation panel of the multifunction product.
摘要:
An image-area separation apparatus includes a SIMD processor performing a SIMD process for performing an image-area separation process and an image-area separation mechanism for performing an image-separation operation according to the SIMD process performed by the SIMD processor. The image-area separating apparatus performs an image-area separation operation to separate character images from figure images by means of software while the SIMD-typed processor achieves a high-speed image data processing.
摘要:
An ethylene-acrylic copolymer rubber composition, which comprises (A) a carboxyl group-containing ethylene-acrylic copolymer rubber, (B) at least one monoamine compound selected from the group consisting of a primary amine, a secondary amine and a tertiary amine, (C) a guanidine type compound, and (D) at least one of an aromatic diamine compound expressed by the following structural formula (1), H2N—Ph-M-Ph—NH2: structural formula (1) wherein M is O, S, SO2, CONH, or O—R—O in which R is Ph, Ph—Ph, Ph—SO2—Ph, (CH2)m, (CH2)C(CH3)2(CH2), or Ph—C(CX3)2—Ph, and m=3–5, X=H or F and Ph=benzene ring.