摘要:
A random copolymer comprises recurring units each having the formula of; ##STR1## wherein R.sup.1 to R.sup.10 stand for a hydrogen atom or an alkyl group with or without R.sup.5 being bonded to R.sup.6 or R.sup.10 via an alkylene group having 1 to 3 carbon atoms. The random copolymer contains 50 to 90 mol % of ethylene. The random copolymer has an intrinsic viscosity [.eta.] of 0.3 to 10 dl/g measured in Decalin.RTM., i.e., decahydronphthalene at 30.degree. C.
摘要:
The present invention provides a high-density fuel oil which is suitable for rockets and jet engines and which mainly comprises a tetracyclo (7. 3. 1. O.sup.2,7. 1.sup.7,11) tetradecane derivative represented by the general formula: ##STR1## wherein each of m and n is 0, 1 or 2, and the sum of m and n is 2 or less.
摘要:
A process for producing oxazolone derivatives, usable as important starting materials for medicines and pesticides, of the following general formula (III) by reacting a compound of the general formula (I) with a compound of the general formula (II) in the presence of an aliphatic tertiary amine: ##STR1## wherein Ar represents an aromatic hydrocarbon residue, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each represent a hydrogen atom, a halogen atom or an organic residue, R.sup.5 represents a hydrocarbon residue and X represents a halogen atom.
摘要:
A method for preparing a norbornene structure compound comprises hydrogenating a compound represented by the formula of ##STR1## wherein l, m and n are integers of 0.ltoreq.l.ltoreq.3, 0.ltoreq.m.ltoreq.8 and 1.ltoreq.n.ltoreq.3, respectively, and each of R.sup.1 to R.sup.6 is a hydrogen atom or a hydrocarbon residue having 1 to 3 carbon atoms with or without R.sup.6 forming a ring with R.sup.4 or R.sup.5, in the presence of a Ziegler type catalyst containing in combination a compound of a transition metal of Groups IV to VI of the periodic table and an organometallic compound of Groups I to III of the periodic table, to thereby convert the compound of the formula (1) into a compound represented by the following formula of ##STR2## wherein l, m and n are the same as above.
摘要:
A recording medium having a base and a recording layer provided on said base, said recording layer consisting essentially of a thermotropic cholesteric liquid crystalline glutamate copolymer represented by the following general formula: ##STR1## wherein R.sub.1 is an alkyl, cycloalkyl, aryl or arylalkyl group having not more than 10 carbon atoms, R.sub.2 is an alkyl, cycloalkyl, aryl or arylalkyl group having 6 to 30 carbon atoms, provided R.sub.1 and R.sub.2 are not the same, and m and n are in the relation of 50.ltoreq.m+n.ltoreq.2,000, m/n=80.about.10/20.about.90.
摘要翻译:一种记录介质,其具有设置在所述基底上的基底和记录层,所述记录层基本上由以下通式表示的热致变性胆固醇液晶谷氨酸共聚物组成:其中R1是烷基,环烷基,芳基或芳基烷基 具有不超过10个碳原子,R 2是具有6至30个碳原子的烷基,环烷基,芳基或芳烷基,其中R1和R2不相同,并且m和n的关系为50 + n = 2,000,m / n = 80差分10/20差分90。
摘要:
In an IC card in which an IC module constituted by a terminal plate 1 having a connection terminal pattern(3), arranged on a surface of an insulating substrate (2), for external power supply, signal connection, and grounding, an IC chip (4) mounted on the rear surface of the terminal plate 1 and electrically coupled to the connection terminal pattern (3), a sealing member (5) for the IC chip, and a reinforcing member (6) for reinforcing the sealing member (5) is mounted on a card base, the reinforcing member (6) consists of a conduction material, and integrally constituted by a ring portion (7) for covering the outer periphery of the sealing member (5) and a flange portion (8), having almost the same shape as that of the outer periphery of the terminal plate (1), for covering the rear surface of the insulating substrate (2). Therefore, an IC card which is strong to damage caused by disconnection of a bonding wire due to peeling between the insulating substrate and the sealing member caused by external force can be provided at low cost.
摘要:
A rewritable or repeatedly employable recording medium having a base and a recording layer film provided on said base, characterized in that said recording layer film is formed by a thermotropic cholesteric liquid crystal polyester.
摘要:
A solid state watch module construction including a plastic substrate and an electro-optical display cell directly mounted on the substrate. The substrate has an integrated circuit chip on one side thereof, and a plurality of printed circuit leads connected to electrical terminals of the integrated circuit chip. The electro-optical display cell has a plurality of electric terminals formed in rows in alignment with terminal ends of said printed circuit leads. The electro-optical display cell is bonded to the one side of the substrate and the electric terminals of the display cell are bonded to the terminal ends of the printed circuit leads.
摘要:
A nonlinear optical material having a high nonlinear optical constant useful for frequency doubler of laser beam which comprises a chiral smectic C liquid crystalline polyester consisting essentially of the structural units having the general formulae (A), (B) and (C); ##STR1## Wherein X is a structural unit selected from the group consisting of ##STR2## Wherein Y is a group having at least one optically active carbon and the total carbon number of Y is 3-12. ##STR3## wherein n is an integer of 2-10.
摘要:
A cholesteric liquid crystal polyester comprising the following structural units (A), (B) and (C): ##STR1## wherein Ar.sup.1 and Ar.sup.2 represent each independently a divalent aromatic hydrocarbon group having 6 to 20 carbon atoms, of which one or more hydrogen atoms may be substituted by one or more halogen atoms, alkyl or alkoxy groups having 1 to 4 carbon atoms, provided that at least 60 mol % of Ar.sup.1 in the polymer is constituted by at least one group selected from 1,4-phenyl group, 2,6-naphthyl group and 4,4'-biphenyl group.