摘要:
A ferroelectric liquid crystal element has a ferroelectric liquid crystal with an orientation state represented by .theta. .theta..sub.a >.theta./2.
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 liquid crystal composition, comprising: at least one optically active mesomorphic compound having an asymmetric carbon atom to which a fluorine atom is directly bonded.
摘要:
A ferroelectric liquid crystal element has a ferroelectric liquid crystal with an orientation state represented by .theta. .theta..sub.a >.theta./2.
摘要:
A liquid crystal device includes: a pair of substrates disposed spaced apart from each other, a liquid crystal disposed between the substrates and a plurality of adhesive members bonding the substrates. The adhesive members are dispersed along the inner surfaces of the substrates at a rate of 100 members/mm.sup.2 or less with an average adhesion area per member of 1.25.times.10.sup.-3 mm.sup.2 or less so as to satisfy the relationship of:S.sub.A /S.sub.B =2.5.times.10.sup.-2 -1.0%,wherein S.sub.A denotes the total area of adhesion given by the adhesive members and S.sub.B denotes the area of display given by the liquid crystal device. Spacer members may be further disposed between the substrates. The spacer members may preferably be in the form of rods having a length in the range of 1 to 25 .mu.m.
摘要:
The present invention provides a liquid crystal material disposed between said pair of substrates, wherein at least one of said substrates is provided with a film comprising a polyimide compound having in its polyimide main-chain structural unit at least one alkyl side chain containing an alkyl chain moiety having a length of 2 to 10 carbon atoms.
摘要:
A ferroelectric liquid crystal device is by disposing between a pair of substrates a ferroelectric liquid crystal composition showing a phase transition series of isotropic.fwdarw.chiral nematic phase (N.sup.*).fwdarw.chiral smectic C phase on temperature decrease. The alignment state of the liquid crystal is improved by forming alignment control films of mutually different materials on the pair of substrates. The alignment state is improved especially when the liquid crystal composition is formulated to show a helical pitch in N.sup.* phase which exceeds three times the spacing between the pair of substrates.
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:
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 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.