摘要:
Disclosed is a synthetic lubricating oil comprising an α-olefin (co)polymer defined by the following features (i) to (v):
(i) said (co)polymer contains constituent units derived from (a) at least one monomer selected from α-olefins of 8 to 20 carbon atoms in amounts of 90 to 100% by mol and contains constituent units derived from (b) ethylene in amounts of 0 to 10% by mol, (ii) the dynamic viscosity at 100°C is in the range of 8 to 500 mm 2 /s, (iii) the number-average molecular weight (Mn), as measured by gel permeation chromatography, is in the range of 500 to 15,000, (iv) said (co)polymer satisfies the following formulas (I) and (II):
A ≤ 24.0×Exp(-0.0239×K) (I)
B ≤ 0.0775×K (II)
wherein A is a content (%) of a (co)polymer having a molecular weight, as measured by gel permeation chromatography, of not more than 1,000, B is a content (%) of a (co)polymer having a molecular weight of not less than 20,000, and K is a dynamic viscosity (mm 2 /s) at 100°C, and (v) the molecular weight distribution (Mw/Mn) is in the range of 1.1 to 1.8.
Also disclosed is a lubricating oil composition comprising the above-mentioned synthetic lubricating oil and a low-viscosity base oil. The synthetic lubricating oil and the lubricating oil composition have high thermal oxidation stability and are excellent in viscosity index, low-temperature viscosity properties and shear stability.
摘要:
The present disclosure relates to the bridged metallocene compounds of formula [I], wherein wherein R 1 to R 14 , Y,M,Q and j are as defined in claim 1, compositions thereof and its use as catalyst for the polymerisation of ethylene and alfa-olefins.
摘要:
A process for preparing a low molecular weight olefin (co) polymer having a narrow molecular weight distribution with the high productivity, by polymerizing or copolymerizing an olefin in the presence of an olefin polymerizing catalyst comprising (A) a Group 4 transition metal compound represented by the following general formula (1), and (B) at least one compound selected from (B-1) an organometallic compound, (B-2) an organoaluminum compound, (B-3) an organoaluminum oxy-compound, and (B-4) a compound which reacts with the Group 4 transition metal compound (A) to form an ion pair, and a novel Group 4 transition metal compound suitable as an olefin polymerizing catalyst component;
(R: hydrogen, hydrocarbon group, or silicon-containing group, M: Ti, Zr or Hf, Y: Group 14 atom, Q: halogen, hydrocarbon group, neutral conjugated or non-conjugated diene, anionic ligand, or neutral ligand which can be coordinated with lone electron pair, n: 2 to 4, j: 1 to 4).
摘要:
A process for preparing a low molecular weight olefin (co) polymer having a narrow molecular weight distribution with the high productivity, by polymerizing or copolymerizing an olefin in the presence of an olefin polymerizing catalyst comprising (A) a Group 4 transition metal compound represented by the following general formula (1), and (B) at least one compound selected from (B-1) an organometallic compound, (B-2) an organoaluminum compound, (B-3) an organoaluminum oxy-compound, and (B-4) a compound which reacts with the Group 4 transition metal compound (A) to form an ion pair, and a novel Group 4 transition metal compound suitable as an olefin polymerizing catalyst component;
(R: hydrogen, hydrocarbon group, or silicon-containing group, M: Ti, Zr or Hf, Y: Group 14 atom, Q: halogen, hydrocarbon group, neutral conjugated or non-conjugated diene, anionic ligand, or neutral ligand which can be coordinated with lone electron pair, n: 2 to 4, j: 1 to 4).
摘要:
A process for preparing a low molecular weight olefin (co)polymer having a narrow molecular weight distribution with the high productivity, by polymerizing or copolymerizing an olefin in the presence of an olefin polymerizing catalyst comprising (A) a Group 4 transition metal compound represented bythe following general formula (1), and (B) at least one compound selected from (B-1) an organometallic compound, (B-2) an organoaluminum compound, (B-3) anorganoaluminum oxy-compound, and (B-4) a compound which reacts with the Group 4 transition metal compound (A) to form an ion pair, and a novel Group 4 transition metal compound suitable as an olefin polymerizing catalyst component; (R: hydrogen, hydrocarbon group, or silicon-containing group, M: Ti, Zr or Hf, Y: Group 14 atom, Q: halogen, hydrocarbon group, neutral conjugated or non-conjugated diene, anionic ligand, or neutral ligand which can be coordinated with lone electron pair, n: 2 to 4, j : 1 to 4).