摘要:
The oil comprises as a base oil carbonic acid ester(s) prepd. from a source of carbonic acid moieties and the following alcoholic components: (A) a monohydric alcohol, (B) a dihydric alcohol, and (C) a neopentyl type polyol having 5-7C and 3-4 OH gps. or its dimer or trimer.
摘要:
A process for preparing a taxane compound is disclosed. The process comprises providing culture cells originating from a plant belonging to Taxus species, culturing the cells in a medium to which an aromatic amino acid or an aromatic carboxylic acid, or both, are added, and collecting a plant component having the taxane structure from the cultured material. The prodcutivity of taxane compounds, which possesses anti-cancer activity, is greatly promoted by the process.
摘要:
A lubricating oil composition comprises an alkylnaphthalene which has one or two alkyl groups each having from 8 to 30 carbon atoms, and at least one member selected from benzo(b)thiophene and derivatives thereof, and naphthalenethiol and derivatives thereof. The composition has good oxidative stability.
摘要:
According to the present invention there is provided a negative zinc electrode for an alkaline storage battery, comprising an electrode using zinc as an active material and a polymer layer which is substantially in direct contact with the electrode, the polymer layer containing at least a polymer having a crosslinked structure, and there is also provided an alkaline storage battery using such negative zinc electrode and in which the occurrence of dendrite and shape change is suppressed.
摘要:
A negative zinc electrode for an alkaline storage battery capable of suppressing the occurrence of dendrite and shape change is provided. The negative zinc electrode comprises an electrode using zinc as an active material and a polymer layer formed substantially in direct contact with the electrode, the polymer layer comprising a polymer having an oxygen permeability constant of not less than 1 x 10⁻¹⁰ cm³ (STP) cm⁻¹s⁻¹cmHg⁻¹. Examples of such polymer include a polymer selected from the group consisting of polydimethylsiloxanes, polyorganosiloxanes, polyvinyltriorganosiloxanes, polyalkylsulfones, poly(4-methylpentene-1), poly(2,6-dimethylphenylene oxide) and low-density polyethylene, or is said polymer with at least one functional group introduced therein.
摘要:
Silicon-containing organic compounds useful as starting materials of functional polymer materials, as well as a process for preparing the same, are provided. The silicon-containing organic compounds are represented by the following general formula:
where R¹ is a π conjugated type divalent organic group having 2 to 30 carbon atoms, R² is a hydrocarbon group having 1 to 30 carbon atoms, X¹ is a halogen atom, m and n satisfy the conditions of 1 ≦ m ≦ 2 and n ≧ 2, respectively. A compound of the above general formula is prepared by reacting an organometallic compound of the following general formula:
M¹ - R¹ - M²
where M¹ and M² are each a metal selected from Group 1, 2 and 12 metals in the Periodic Table, with a silane compound of the following general formula:
where R² is a hydrocarbon group having 1 to 30 carbon atoms, X¹, X² and X³ are each a halogen atom.
摘要:
A compensator for a liquid crystal display device is made by applying a solution containing a liquid crystalline polymer onto an orientation substrate, then allowing the liquid crystalline polymer to be oriented, and thereafter transferring the resulting layer of the liquid crystalline polymer on the orientation substrate onto a light transmitting substrate, said solution containing the liquid crystalline polymer having incorporated therein 0.01% to 10% by weight of a surface active agent relative to the liquid crystalline polymer.