摘要:
A viscosity modifier for lubricating oils or an additive composition for lubricating oils, which is excellent in oil-thickening properties and can provide lubricating oil compositions excellent in low-temperature characteristics and handleability at low temperatures; and lubricating oil compositions excellent in low-temperature characteristics and handleability at low temperatures. The viscosity modifier comprises an ethylene/α-olefin copolymer (B) which comprises (i) a structural unit derived from ethylene, (ii) a structural unit derived from an α-olefin having 3 to 19 carbon atoms, and (iii) a structural unit derived from a higher α-olefin having 4 to 20 carbon atoms whose carbon number is by one or more larger than that of the α-olefin having the unit (ii) which has the following properties of (1) and (2): (1) the contents of units (i), (ii) and (iii) are 25-49 mol %, 15-55 mol %, and 9-40 mol % respectively (with the proviso that the total of the units (i), (ii) , and (iii) is 100 mol %) and (2) the intrinsic viscosity [η] is 0.5 to 5.0 dl/g.
摘要:
A viscosity modifier for lubricating oils or an additive composition for lubricating oils, which is excellent in oil-thickening properties and can provide lubricating oil compositions excellent in low-temperature characteristics and handleability at low temperatures; and lubricating oil compositions excellent in low-temperature characteristics and handleability at low temperatures. The viscosity modifier comprises an ethylene/α-olefin copolymer (B) which comprises (i) a structural unit derived from ethylene, (ii) a structural unit derived from an α-olefin having 3 to 19 carbon atoms, and (iii) a structural unit derived from a higher α-olefin having 4 to 20 carbon atoms whose carbon number is by one or more larger than that of the α-olefin having the unit (ii) which has the following properties of (1) and (2): (1) the contents of units (i), (ii) and (iii) are 25-49 mol %, 15-55 mol %, and 9-40 mol % respectively (with the proviso that the total of the units (i), (ii), and (iii) is 100 mol %) and (2) the intrinsic viscosity [η] is 0.5 to 5.0 dl/g.
摘要:
A lubricating oil composition for a power transmission system, which is excellent in both of low-temperature viscosity property and shear stability, is provided. The viscosity modifier of a lubricating oil for a power transmission system according to the present invention comprises an ethylene/α-olefin copolymer (B) having the properties: (B1) an ethylene content in the range of 70 to 85% by mol, (B2) an intrinsic viscosity [η] in the range of 0.2 to 1.0 dl/g, (B3) Mw/Mn not more than 2.4, and (B4) a melting point, as measured by DSC, not higher than 60° C., or no melting point observed.
摘要:
A lubricating oil composition for a power transmission system, which is excellent in both of low-temperature viscosity property and shear stability, is provided. The viscosity modifier of a lubricating oil for a power transmission system according to the present invention comprises an ethylene/α-olefin copolymer (B) having the properties: (B1) an ethylene content in the range of 70 to 85% by mol, (B2) an intrinsic viscosity [η] in the range of 0.2 to 1.0 dl/g, (B3) Mw/Mn not more than 2.4, and (B4) a melting point, as measured by DSC, not higher than 60° C., or no melting point observed.
摘要:
The present invention is a polyolefin polymer containing vinyl groups at both ends thereof, and a composition and a molded product containing the polymer, wherein the polymer contains a constitutional unit derived from at least one selected from the group consisting of ethylene (a), an α-olefin (b) having 3 to 20 carbon atoms, and a cyclic olefin (c), and (1) a ratio of terminal vinylation is 70% or more relative to all of both ends of molecular chains, and (2) an intrinsic viscosity [η] is in the range of 0.01 to 10 dl/g as measured in a decalin solution at 135° C. The polymer of the present invention may be molded by a LIM molding, an injection molding, a transfer molding, a compression molding, and the like, and is excellent in acid resistance, gas permeation resistance, hydrolysis resistance, and dynamic fatigue resistance. From the polymer, a thermoplastic resin composition and a crosslinkable resin composition, and a crosslinked composition having excellent mechanical characteristics are obtained.
摘要:
The present invention is a polyolefin polymer containing vinyl groups at both ends thereof, and a composition and a molded product containing the polymer, wherein the polymer contains a constitutional unit derived from at least one selected from the group consisting of ethylene (a), an α-olefin (b) having 3 to 20 carbon atoms, and a cyclic olefin (c), and (1) a ratio of terminal vinylation is 70% or more relative to all of both ends of molecular chains, and (2) an intrinsic viscosity [η] is in the range of 0.01 to 10 dl/g as measured in a decalin solution at 135° C. The polymer of the present invention may be molded by a LIM molding, an injection molding, a transfer molding, a compression molding, and the like, and is excellent in acid resistance, gas permeation resistance, hydrolysis resistance, and dynamic fatigue resistance. From the polymer, a thermoplastic resin composition and a crosslinkable resin composition, and a crosslinked composition having excellent mechanical characteristics are obtained.
摘要:
The present invention provides a lubricating oil composition having excellent low temperature viscosity properties suitable for engine oils for automobiles and industries, gear oils, shock absorber oils, hydraulic fluids and it also provides a lubricating oil for internal-combustion engines formed from the composition. The lubricating oil composition comprises; a lubricating oil base (A) having a kinematic viscosity at 100° C. of 1 to 50 mm2/s and a viscosity index of not less than 80, an ethylene•propylene copolymer (B) having the following properties (B1) to (B4) such that (B1) the ethylene content is from 30 to 75% by weight, (B2) the intrinsic viscosity [η] is from 1.3 to 2.0 dl/g, (B3) the Mw/Mn is not more than 2.4 and (B4) the melting point as measured with DSC is not higher than 30° C., and optionally a pour point depressant (C).
摘要:
The present invention provides a lubricating oil composition having excellent low temperature viscosity properties suitable for engine oils for automobiles and industries, gear oils, shock absorber oils, hydraulic fluids and it also provides a lubricating oil for internal-combustion engines formed from the composition.The lubricating oil composition comprises; a lubricating oil base (A) having a kinematic viscosity at 100° C. of 1 to 50 mm2/s and a viscosity index of not less than 80, an ethylene•propylene copolymer (B) having the following properties (B1) to (B4) such that (B1) the ethylene content is from 30 to 75% by weight, (B2) the intrinsic viscosity [η] is from 1.3 to 2.0 dl/g, (B3) the Mw/Mn is not more than 2.4 and (B4) the melting point as measured with DSC is not higher than 30° C., and optionally a pour point depressant (C).
摘要:
An electrical conductive member includes: an electrical conductive structure including: a substrate; an electrical conductive carbon layer provided on at least one surface of the substrate and containing electrical conductive carbon; and a middle layer interposed between the substrate and the electrical conductive carbon layer. An intensity ratio R (ID/IG) of a D-band peak intensity (ID) to a G-band peak intensity (IG) measured by a Raman scattering spectroscopic analysis in the electrical conductive carbon layer is between 1.4 and 1.9.
摘要:
Embodiments of the invention are directed to a method of controlling a mover device The method includes generating a moving force from a moving force generating unit to move a processing base with respect to a movable base, thereby moving the processing base with respect to a fixed base as a result of the movement of the processing base with respect to the movable base; moving the movable base on the fixed base in the opposite direction to the moving direction of the processing base by virtue of a reaction force caused by the moving force generated from the moving force generating unit to move the processing base, so that the movable base moves in the opposite direction to the moving direction of the processing base on the fixed base. The method further includes controlling the moving velocity of the processing base with respect to the fixed base.