Abstract: A heat-sensitive recording material wherein a color-forming layer comprising a coupling substance which is usually colorless or light-colored and a developer which gives rise to color in the coupling substance upon heating further contains, as a sensitizer, a tetrahydronaphthalene compound of the following general formula (I): ##STR1## wherein X represents an alkylene group, --O--CO--O--, --O--CO-- or --O--R'.sub.n Y--, n represents 1 or 2, Y represents --O-- or --S--, R' represents an alkylene group, and R represents a phenyl, alkylphenyl or tetrahydronaphthyl group.

Abstract: The present invention provides a stabilized polyolefin resin composition having improved resistances to oxidation and to weather which is prepared by adding (a) a phenol antioxidant, (b) a sulfur antioxidant, (c) a hindered amine light stabilizer and (d) an aliphatic monocarboxylate of a metal belonging to the group Ia or IIb to a polyolefin resin containing an inorganic filler.

Abstract: A tolane compound represented by the following general formula (I) which can elevate the anisotropy (.DELTA.n) of the refractive index of a liquid crystal composition: ##STR1## wherein R represents an alkynyl or an alkadienyl group having 3 to 18 carbon atoms, and R' represents an alkyl or an alkoxy group having 1 to 18 carbon atoms.

Abstract: A substituted acridine derivative represented by ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7 and R.sub.8 are independently hydrogen atoms, alkyl groups, substituted alkyl groups, aryl groups, substituted aryl groups, halogen atoms, or alkoxy groups, and Z.sub.1 is a six-membered heteroaromatic group which has one or two nitrogen atoms in its ring and may have an alkyl substituent having 1 to 8 carbon atoms, or a quinolyl group; and a photopolymerizable composition comprising 0.01 to 10 parts by weight of said derivative, 100 parts by weight of a photopolymerizable compound having a boiling point of 100.degree. C. or higher at atmospheric pressure and at least one kind of ethylenic unsaturated group, and 0 to 400 parts by weight of a thermoplastic organic polymer.

Abstract: An optically active bisaryl compound represented by the general formula (I): ##STR1## wherein Ar.sub.1 and Ar.sub.2 represent each a phenyl, naphthyl, biphenyl or pyrimidylphenyl group optionally substituted with an alkyl, alkoxy, cyano or cycloalkyl group or a halogen atom, and * represents an asymmetric carbon atom,which can give a cholesteric phase of a short helical pitch when added to nematic liquid crystals useful as a component of a liquid crystal mixture for a display device.

Abstract: A synthetic resin composition stabilized particularly against the deterioration caused by the action of heat and light, which comprises 100 parts by weight of a synthetic resin, 0.001 to 10 parts by weight of a cyclic phosphite compound represented by the following general formula (I) and 0.001 to 10 parts by weight of a hindered amine compound having a group represented by the following general formula (II) in its molecule: ##STR1## wherein R.sub.1 stands for a tert-butyl or tert-amyl group; R.sub.2 stands for a C.sub.1.about.9 alkyl group; R.sub.3 stands for a hydrogen atom or a C.sub.1.about.4 alkyl group and R.sub.4 stands for a C.sub.1.about.30 alkyl group.

Abstract: An optically active ester compound useful as a component of a ferroelectric liquid crystal composition is represented by the following formula: ##STR1## wherein R is C.sub.1-18 alkyl or C.sub.1-18 alkoxyl; R' is C.sub.1-18 alkyl or C.sub.

Abstract: A cyclic phosphonite compound having the following formula (I) is disclosed and useful as a stabilizer for a synthetic resin. ##STR1## in which R1 is an alkyl, phenyl or an alkylphenyl, R2 is hydrogen or an alkyl, R3 is an alkyl, R4 is hydrogen or methyl and R1 and R2 may form an alkylene by linking each other.

Abstract: A process is provided for improving the resistance to deterioration when exposed to weather and the adherence to other materials of polypropylene, particularly in the form of moldings, which comprises subjecting a surface of polypropylene to the action of activated oxygen gas at a temperature below about 100.degree. C. in the presence of an N-alkyl or N-acyl 2,2,6,6-tetramethyl piperidyl compound for a time sufficient to improve such weather resistance and adherence.

Abstract: A process is provided for improving the resistance to deterioration when exposed to weather and the adherence to other materials of polypropylene, particularly in the form of moldings, which comprises subjecting a surface of polypropylene to the action of activated oxygen gas at a temperature below about 100.degree. C. in the presence of an N-alkyl or N-acyl 2,2,6,6-tetramethyl piperidyl compound for a time sufficient to improve such weather resistance and adherence.

Abstract: Acridine compounds such as 1,4-butylene-bis-.beta.-(acridin-9-yl)acrylate, or the like are high in light sensitivity and suitable as a photopolymerization initiator.

Abstract: The present invention discloses an optically active pyrimidine compound represented by the following general formula: ##STR1## wherein, n is 3 to 5; X is hydrogen atom or chlorine atom; when X is hydrogen atom, R.sub.1 is normal alkyl having from 1 to 12 carbon atoms and when X is chlorine atom, R.sub.1 is hydrogen atom or normal alkyl having from 1 to 12 carbon atoms; R.sub.2 is normal alkyl having from 1 to 18 carbon atoms; and C* represents an asymmetric carbon atom.

Abstract: An optically active compound useful as a component of a ferroelectric liquid crystal composition represented by the following general formula (I) and a ferroelectric liquid crystal composition containing the same: ##STR1## wherein R stands for a C.sub.1.about.18 alkyl group; R' stands for a C.sub.1.about.18 alkyl group which may be substituted or an aryl group; X stands for ##STR2## or --O-- and an asterisk refers to an optically active carbon atom.

Abstract: A heat-sensitive recording material wherein 1,2-bis(3,4-dimethylphenyl)ethane is contained as a sensitizer in a color-forming layer comprising a usually colorless or light-colored coupling substance and a developer which causes coloring of the coupling substance upon heating.

Abstract: An optically active ester of the formula ##STR1## wherein p is 0 or 1, q is 1 or 2, r is 1 or 2, q+r is 3, and s is 0 or 1. R.sub.1 and R.sub.2 in the above formula are each independently selected from the group consisting of C.sub.6-18 straight chain alkyl and an optically active group of the formula ##STR2## and in which m is 2 to 5, n is 1 or 2, X is hydrogen or chlorine, R.sub.3 is hydrogen or C.sub.1-11 straight chain alkyl, and C.sup.* represents a chiral carbon atom, with the proviso that when n is 1 and X is hydrogen, R.sub.3 is C.sub.1-11 straight chain alkyl. When q is 2 and r is 1 and R.sub.1 is C.sub.6-18 straight chain alkyl, p is 1; on the other hand, when q is 1 and r is 2 and R.sub.2 is an optically active group of the above formula, s is 1. One of R.sub.1 and R.sub.2 is an optically active group of the above formula, and the other of R.sub.1 and R.sub.2 is C.sub.6-18 straight chain alkyl.

Abstract: A stabilized synthetic resin composition obtained by adding (1) 0.01 to 5 parts by weight of at least one monopiperidine compound represented by the following general formula (I): ##STR1## wherein R.sub.1 represents an alkyl group, an oxyl group or an acyl group, andR.sub.2 represents an aliphatic monoacyl group carrying 12 to 30 carbon atoms,and (2) 0.001 to 5 parts by weight of at least one polypiperidine compound having two or more tetramethylpiperidine groups represented by the following general formula (II) per molecule: ##STR2## to 100 parts by weight of a synthetic resin.

Abstract: Polyvinyl chloride resin stabilizer compositions are provided, comprising a 2,2,6,6-tetramethyl piperidinyl compound and an ammonium or metal perchlorate; and also stabilized polyvinyl chloride resin compositions containing such stabilizers, and optionally including a plasticizer, and particularly as molded articles with polyurethane foam backing.

Abstract: A polymer composition comprises a polymer blend comprising a polyester and a polycarbonate or another polymer blend comprising alpha-methylstyrene-modified ABS resin and at least one polymer selected from a polycarbonate, a saturated polyester, polyphenylene ether, a polyamide and a polyacetal and an organic phosphite compound having the formula (I): ##STR1## in which R is an alkyl having 1 to 9 carbon atoms.

Abstract: The present invention discloses an optically active cyanobiphenyl compound represented by the following general formula: ##STR1## wherein, R is ##STR2## X is hydrogen atom or chlorine atom: when X is hydrogen atom, R.sub.1 is normal alkyl having from 1 to 11 carbon atoms and when X is chlorine atom, R.sub.1 is hydrogen atom or normal alkyl having from 1 to 11 carbon atoms; n is 3 to 5; Y is --CH.sub.2 --or --CO--; and * represents an asymmetric carbon atom.

Abstract: An optical recording material having excellent light stability, shelf stability and solubility in a solvent comprises, as an indispensable constituent, a compound of the following general formula: ##STR1## wherein R represents a cycloalkyl group having 3 to 12 carbon atoms, X.sup.- represents a halide anion, a perchlorate anion or a quencher anion, rings A and B each represent a benzene or naphthalene ring which may be substituted with a halogen atom, and n represents 1 to 4.