Abstract: A sandwich molding comprising:a core layer covered by the skin layersaid skin layer comprising either an olefin-based thermoplastic elastomer or a styrene-based thermoplastic elastomer,said core layer comprising either a mixture comprising at least a crystalline polypropylene resin and an ethylene-.alpha.-olefin copolymer or a mixture comprising at least a crystalline polypropylene resin and a styrene-based elastomer.

Abstract: A orifice passage for introducing excessive resin into a disposal tab forming cavity is provided at one end of a main cavity in a mold for sandwich molding. The section of the orifice passage is thinner in the central portion than in the opposite sides thereof. A thermoplastic elastomer for forming an outer layer of the molding is injected into the main cavity and then talc-containing polypropylene for forming the core of the molding is injected. The flow rate of the resins flowing through the orifice passage at this time becomes substantially uniform over the entirety of the section. Therefore, the talc-containing polypropylene sufficiently extends toward the opposite sides of the main cavity.

Abstract: The present invention provides a portable power source comprising a fuel cell generating electricity using hydrogen as fuel, a hydrogen storage unit filled with hydrogen absorbing alloy for supplying hydrogen to the fuel cell, a case enclosing the fuel cell and hydrogen storage unit, and a lid for sealing a part of the case when the portable power source is not in use, wherein the lid seals a surface of the case on which at least one air inlet for taking in the air necessary for the fuel cell to generate electricity and a reactant gas outlet for exhausting reactant gas produced by the generation of electricity are formed.

Abstract: Molding a hollow shaped body which has a skin made of a synthetic resin and a hollow portion therein by a mold block provided with a mold cavity in the shape of the hollow shaped body, a tub into which an excess amount of the synthetic resin can flow and a small flow path communicating between the mold cavity and the tub. The process includes forming the skin of the hollow shaped body by injecting a molten synthetic resin into the mold cavity to fill up the cavity. Thereafter, a gas is introduced into the injected synthetic resin to thereby form the hollow portion. The gas injection forces a part of the synthetic resin out of the mold cavity and into the tub through the small flow path.

Abstract: A mold for making a double layer molded product, such as a molded product of sandwich construction or a hollow molded product having a dam within the mold cavity adjacent its gate. The dam projects in a direction transverse to that in which the inner-forming material is injected, and a gap is defined between the dam and the walls of the cavity. With this configuration, the core thickness of the molded product of sandwich construction, or the skin thickness of the hollow molded product, are made uniform.

Abstract: 2-phenylpyridine derivatives represented by the general formula: ##STR1## wherein when Y is R--, Z is one of R--, RO--, ##STR2## when Y is RO--, Z is one of straight chain pentyl, ##STR3## and when Y is one of Z is one of R--, RO-- and --CN; when Y is --CN, Z is one of RO--, ##STR4## and R is a straight chain alkyl group from 1 to 12 carbon atoms, are disclosed. The 2-phenylpyridine derivatives in accordance with the invention are particularly well-suited for use in nematic liquid crystal compositions for reducing the steepness and response time of the liquid crystal compositions in a liquid crystal display device.

Abstract: 2-phenylpyridine derivatives having the general formula: ##STR1## wherein Y is ##STR2## and Z is a straight chain alkyl group having from 1 to 16 carbon atoms, ##STR3## R' is a straight chain alkyl group having from 2 to 12 carbon atoms, R.sup.2 is a straight chain alkyl group having from 1 to 12 carbon atoms, n is an integer from 1 to 10 and * is an asymmetric carbon are provided. The derivatives are stable, have low viscosity, excellent electro-optical response properties and broaden the ferroelectric temperature range when added to ferroelectric liquid crystal compositions.

Abstract: 2-phenylpyridine derivatives represented by the general formula: ##STR1## wherein when Y is R--, Z is one of R--, RO--, ##STR2## when Y is RO--, Z is one of straight chain pentyl, ##STR3## and --CN; and when Y is one of ##STR4## Z is one of R--, RO-- and --CN; when Y is --CN, Z is one of RO--, ##STR5## and R is a straight chain alkyl group from 1 to 12 carbon atoms, are disclosed. The 2-phenylpyridine derivatives in accordance with the invention are particularly well-suited for use in nematic liquid crystal compositions for reducing the steepness and response time of the liquid crystal compositions in a liquid crystal display device.

Abstract: Asymmetric trans-4,4'-dialkyl-ONN-azoxybenzenes having the general formula: ##STR1## wherein R.sub.1 and R.sub.2 are straight-chain alkyl groups having from 1 to 10 carbon atoms and R.sub.1 .noteq.R.sub.2 are provided. The azoxybenzene compounds are prepared by condensing corresponding P-alkylaniline ##STR2## and P-alkylnitrobenzene ##STR3## placing the reaction mixture into ammonium chloride and hydrolyzing to yield the asymmetrical azoxybenzene compound, corresponding asymmetrical azobenzene compound and asymmetric azobenzene compound. The asymmetric azoxy compound is then separated from the mixture by column chromotography and recrystallization. The asymmetric azoxybenzene compounds have a wide range of nematic liquid crystal temperature and are particularly well suited for liquid crystal compositions for use in matrix-addressing driving systems.