摘要:
Novel perfluoropolyether derivatives are described which are obtained from perfluoropolyethers having a carboxyl group at one or both ends and monoamines or diamines. The derivative is useful as a lubricant owing to its significantly improved lubricity. The lubricity is shown under severe high or low temperature and humidity conditions over a long term. The derivative is especially useful as a lubricant for magnetic recording mediums of the coating and metal thin film types.
摘要:
A lubricant contains ester compound made of perfluoropolyether and long chain alkyl carboxylic acid or alcohol. The perfluoropolyether has hydroxyl or carboxyl group at its end. The ester compound is admixed with long chain alkyl amine of from 0.01 to 100 in mole ratio. The long chain alkyl may be partially fluorined or perfluoro alkyl. At least one of phosphoric ester, phosphorous ester and long chain carboxylate ester can be further admixed. A magnetic recording medium can be coated by the lubricant.
摘要:
Novel perfluoropolyether derivatives are described which are obtained from perfluoropolyethers having a carboxyl group at one or both ends and monoamines or diamines. The derivative is useful as a lubricant owing to its significantly improved lubricity. The lubricity is shown under severe high or low temperature and humidity conditions over a long term. The derivative is especially useful as a lubricant for magnetic recording mediums of the coating and metal thin film types.
摘要:
Disclosed is a solar cell module in which a reduction in the adhesive strength of the sealing resin used is suppressed even after use in a severe environment for a long period of time, in which corrosion of an electrode is prevented, and which has favorable flame resistance. The solar cell module uses, as the sealing resin, a blended polymer of a thermoplastic ester polyol polyurethane resin including an ester-based polyol unit and a thermoplastic ether polyol polyurethane resin including an ether-based polyol unit. The blending mass ratio of the thermoplastic ester polyol polyurethane resin to the thermoplastic ether polyol polyurethane resin in the blended polymer is 10:90 to 50:50. The thermoplastic ether polyol polyurethane resin includes a polyurethane resin A having flame resistance and a polyurethane resin B having lower flame resistance but higher adhesion properties than the polyurethane resin A.
摘要:
A liquid crystal cell is formed by a pair of substrates each provided with an electrode and disposed spaced apart from each other, spacers and particulate adhesives respectively dispersed between the substrates and a liquid crystal, particularly a ferroelectric liquid crystal, sandwiched between the substrates. The particulate adhesives are dispersed with a non-uniform distribution over the cell extension so as to minimize initial zigzag or serrate alignment defects.
摘要:
A ferroelectric liquid crystal element comprises a ferroelectric liquid crystal and a pair of substantially parallel substrates having opposite surfaces between which the ferroelectric liquid crystal is sealed. The substrates are provided with electrodes to which voltages are applied, and are subjected to one axis orientation treatment so as to orient the ferroelectric liquid crystal. The ferroelectric liquid crystal has an orientation state represented by the following condition: &thgr; &thgr;a>{fraction (&thgr;/2)}.
摘要:
A ferroelectric liquid crystal device comprises a pair of opposite electrodes and a ferroelectric liquid crystal disposed between the electrodes. At least one of the opposite electrodes is coated with an insulating film having a thickness of 200 .ANG. or larger. The ferroelectric liquid crystal has a capacitance C.sub.LC measured in (nF/cm.sup.2) and a spontaneous polarization PS measured in (nC/cm.sup.2) and the insulating film has a capacitance Ci measured in (nF/cm.sup.2) wherein the magnitudes of C.sub.LC, Ps, and Ci satisfy the relationship ofCi.gtoreq.7.multidot.Ps-C.sub.LC.
摘要:
A solar cell module includes a glass substrate, a first sealing resin layer, a solar cell connected to a tab wire, a second sealing resin layer, and a protective sheet, which are laminated. The second sealing resin layer is formed from a blend polymer of a thermoplastic polyurethane resin having an ester-type polyol unit and a thermoplastic polyurethane resin having an ether-type polyol unit. The blend ratio of the thermoplastic polyurethane resin having the ester-type polyol unit to the thermoplastic polyurethane resin having the ether-type polyol unit in the blend polymer is 20:80 to 50:50 by mass.
摘要:
A magnetic recording medium having a thin magnetic metal film formed by vapor deposition under an atmosphere of an introduced oxygen gas. The thickness of the surface oxide film having the degree of oxidation of 50% or higher is maintained so as to be not higher than 5% of the total film thickness of the thin magnetic metal film. The magnetic recording medium is affected to a lesser extent by the surface oxide layer such that it is superior in magnetic properties, such as coercivity, and in electromagnetic properties.
摘要:
A liquid crystal device includes a pair of substrates with a orientation controlling film being provided on at least one of the substrates through a base layer, and a ferroelectric smectic liquid crystal which is disposed between the substrates. The orientation controlling film has a uniaxial orientation processing axis. The ferroelectric smectic liquid crystal generates two different stable orientation states at high and low temperatures regions within the temperature range achieving the ferroelectric smectic phase. The ferroelectric smectic liquid crystal is in one of the two stable orientation states which is generated at the low temperature region when the liquid crystal in the other stable orientation state generated at the high temperature region cools. Where d is the thickness of the orientation controlling film and S is the average surface roughness of the base layer, d and S have the relation expressed by0.ltoreq.S/d
摘要翻译:液晶装置包括:一对基板,其具有通过基底层在至少一个基板上设置的取向控制膜,以及设置在基板之间的铁电体相液晶。 取向控制膜具有单轴取向处理轴。 铁电层状液晶在实现铁电近晶相的温度范围内的高温和低温区产生两种不同的稳定取向状态。 当在高温区域产生的另一个稳定取向状态的液晶冷却时,铁电体系液晶处于在低温区域产生的两种稳定取向状态之一。 其中d是取向控制膜的厚度,S是基层的平均表面粗糙度,d和S具有由0 S / d <0.70表示的关系。