摘要:
A polypropylene composite film having a propylene/1-butene random copolymer which has 60 to 90 mol % of propylene units and 10 to 40 mol % of 1-butene units and has a triad isotacticity of not less than 85% and not more than 97.5%, a molecular weight distribution of from 1 to 3, an intrinsic viscosity of from 0.1 to 12 dl/g, a melting point of from 40 to 75° C. and a crystallization rate at 45° C. of 10 minutes or less, and satisfying the following relation, 146 exp (−0.022M)≧Tm ≧125 exp (−0.032M), and an olefin catalyst for preparation thereof.
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:
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:
A silicon-containing olefin copolymer is provided which comprises (a) a constituent unit derived from —CH2—CH2— such as ethylene, (b) a constituent unit derived from —CH2—CHR— where R is a hydrocarbon group of 1 to 18 carbon atoms, and (c) a constituent unit containing a specific silicon-containing group. A silicon-containing olefin copolymer is also provided which is obtainable by co-polymerizing ethylene, an a-olefin of 3 to 20 carbon atoms and a specific silicon-containing ethylene monomer.
摘要:
A method of controlling a mover device that includes: a fixed base; a movable base that is moveable in a linear direction with respect to the fixed base; a processing base that is movable in a linear direction with respect to the movable base, the linear direction being in parallel with the linear moving direction of the movable base; and a moving force generating unit that is provided between the processing base and the movable base, and forms a main moving unit in cooperation with the processing base and the movable base, includes the steps of: generating a moving force from the moving force generating unit to move the processing base with respect to the movable base, thereby moving the processing base with respect to the 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; and controlling the moving velocity of the processing base with respect to the fixed base.
摘要:
A humidifier which comprises an inner case of the shape of a cylinder having a bottom, an outer case of cylinderical shape arranged to be concentric with the inner case, and a plurality of hollow fiber membranes being placed in the space between the two cases and formed into a hollow fiber membrane bundle of a cylindrical shape, wherein fluid pathways are provided which connect from the interior part to the exterior part of the hollow fiber membrane bundle. The humidifier allows all of the hollow fiber membranes to take part in humidification effectively, and thus exhibits improved efficiency in humidification.
摘要:
The first silicon-containing olefin copolymer of the present invention comprises (a) a constituent unit derived from —CH2—CH2—, (b) a constituent unit derived from —CH2—CHR— [R is a hydrocarbon group of 1 to 18 carbon atoms], and (c) a constituent unit containing a specific silicon-containing group, and has a molar ratio [(a)/(b)] of the constituent units (a) to the constituent units (b) of from 99/1 to 30/70, a content of the constituent unit (c) of from 0.1 to 10 mol % based on 100 mol % of the total amounts of the constituent units (a), (b) and (c), and a branching index of not less than 0.70. The second silicon-containing olefin copolymer of the present invention is obtainable by copolymerizing ethylene, an α-olefin of 3 to 20 carbon atoms and a specific silicon-containing ethylene monomer, and has a molar ratio of ethylene to α-olefin of from 99/1 to 30/70, an intrinsic viscosity, as measured in decalin at 135° C., of from 0.1 to 10 dl/g, a content of the ethylene monomer of from 0.1 to 10 mol % based on 100 mol % of the total amounts of ethylene, α-olefin and the ethylene monomer. These copolymers may be cross-linked and then submitted to use, and have a high cross-linking rate, excellent productivity, heat ageing properties, weathering resistance. They, further, can provide a rubber composition capable of preparing molded articles having excellent properties such as scratch resistance, resistance to compression set, electric properties and strength. They furthermore can provide sealing materials, potting materials, coating materials and adhesives made from the composition and also provide cross-linked articles of the composition.
摘要:
The present invention provides new acylsulfonamide derivatives such as 4-(3-trifluoromethyl)phenylethynyl-N-(2-(5-ketohexanoylamino)sulfonylphenyl)benzamide, 4-(3-trifluoromethyl)phenylethynyl-N-(2-(2-propyloxyacetylamino)sulfonylphenyl)benzamide or analogues thereof. These acylsulfonamide derivatives have a hypoglycemic effect equal to or superior to the effects of the conventional hypoglycemic agents and they are free from the side effects unlike the glitazone compounds.
摘要:
An olefin thermoplastic elastomer composition comprises a crystalline polyolefin resin (A) and an ethylene/&agr;-olefin/nonconjugated polyene copolymer rubber (B), and optionally a softener (C) and/or an inorganic filler (D), in a specific ratio. The copolymer rubber (B) is prepared by the use of a metallocene catalyst and comprises ethylene, an &agr;-olefin of 3 to 20 carbon atoms and a nonconjugated polyene. This composition ca provide molded products of more excellent tensile strength, elongation at break, elastomeric properties (elongation set, permanent compression set, etc.), heat resistance and low-temperature properties than the conventional non-crosslinked olefin thermoplastic elastomers, even if the composition is in the non-crosslinked form. The composition in the partially or completely crosslinked form can provided molded products of more excellent low-temperature properties, tensile strength, elongation at break and elastomeric properties than the conventional vulcanized rubbers.
摘要:
The present invention is intended to obtain a viscosity modifier for a lubricating oil, by the use of which a lubricating oil composition of excellent low-temperature properties can be obtained, and to obtain a lubricating oil composition of excellent low-temperature properties containing the viscosity modifier. The viscosity modifier for a lubricating oil comprises an ethylene/propylene copolymer (A) having the properties: the density is in the range of 857 to 882 kg/m3, Mw is in the range of 80,000 to 400,000, Mw/Mn is not more than 2.3, and the density (D (kg/m3)) and the melting point (Tm (° C.)) satisfy the relation Tm≦1.247×D−1037; or comprises an ethylene/propylene copolymer (B) having the properties: the ethylene content is in the range of 70 to 79 wt %, Mw is not less than 80,000 and less than 250,000, Mw/Mn is not more than 2.3, Tm is in the range of 15 to 60° C., and the ethylene content (E (wt %)) and the melting point (Tm (° C.)) satisfy the relation 3.44×E−206≧Tm; or comprises an ethylene/propylene copolymer (C) having the properties: the ethylene content is in the range of 70 to 79 wt %, Mw is in the range of 250,000 to 400,000, Mw/Mn is not more than 2.3, Tm is in the range of 15 to 60° C., and the ethylene content (E (wt %)) and the melting point (Tm (° C.)) satisfy the relation 3.44×E−204≧Tm. The lubricating oil composition comprises the ethylene/propylene copolymer (A) (B) or (C), a lubricating oil base (D), and if necessary, a pour point depressant.