摘要:
A method for producing a carbonaceous material including the step of contacting a carbon material with a polymer having in the molecule thereof one or more reactive group(s) selected from aziridine group, oxazoline group, N-hydroxyalkylamido group, epoxy group, thioepoxy group, isocyanato group, hydroxyl group, amino group, vinyl group, acryl group or methacryl group, and an alkoxycarbonyl group represented by the formula (I) R 1 R 2 R 3 C-O-CO- wherein R 1 , R 2 and R 3 are the same or different groups and denote a hydrogen atom, or a specific organic residue.
摘要:
The present invention provides a novel liquid crystalline polyester comprising structural units represented by the following general formulae A, B, C and D : or and where X and Y are each independently H, Cl, Br or an alkyl group having 1 to 4 carbon atoms, the molar ratio of A/B is in the range from 49/1 to 20/30 and that of C/D is in the range from 10/40 to 45/5.
摘要:
A catalyst component for use in the polymerization or copolymerization of olefin(s) is obtained by contacting the following components (1) to (4) with one another: (1) a compound of the general formula Me¹R¹p(OR²)qX¹4-p-q where R¹ is a hydrocarbon radical having 1 to 24 carbon atoms, X¹ is a halogen atom, Me¹ is Zr, Ti or Hf, and n is 0 ≦ n ≦ 4; (2) a compound of the general formula Me²R³m(OR⁴)nX²z-m-n where R² is a hydrocarbon radical having 1 to 24 carbon atoms, X² is a halogen atom, Me² is an element from Groups I to III in the Periodic Table, z is the valence of Me² and m is 0 ≦ m ≦ z; (3) an organocyclic compound having two or more conjugated double bonds; and (4) a modified organoaluminum compound containing Al-O-Al bond and with at least one branched-chain alkyl group being attached to aluminum atom.
摘要:
Lubricating oil compositions favorably used for food processing machines are disclosed. The oil compositions exhibit highly improved oxidation stability, wear resistance and rust prevention. Raw materials quite harmless to human bodies can be used in the production of said lubricating oil composition which comprises (I) as the base oil, a saturated aliphatic acid glyceride represented by the following general formula wherein R1, R2 and R3 are each a straight-chain alkyl group and (II) as an essential component, an aliphatic acid in an amount of 0.001 to 5% by weight, based on the total composition.
摘要:
A polyethylene article such as film or fiber having high strength and high elastic modulus is produced by orienting an ultra-high molecular weight polyethylene having an intrinsic viscosity at 135°C in decalin of 5 to 50 dl/g, said ultra-high molecular weight polyethyelene being prepared by homo- or copolymerizing ethylene in the presence of a catalyst system and hydrogen, said catalyst system comprising (1) a solid catalyst component containing at least magnesium and one or both of titanium and vanadium, (2) an organometallic compound and (3) a compound represented by the following general formula [I] : where R 1 , R 2 , R 3 and R 4 are each hydrogen or a hydrocarbon residue, with the proviso that any two of R 1 , R 2 , R 3 and R 4 may conjointly form a cyclic hydrocarbon residue.