摘要:
A polyester polymer comprising repeating units (I), or repeating units (I) and (II), and having a reduced viscosity (.eta..sub.sp /c) of 0.2 to 10.0 dl/g, measured at 20.degree. C. as a 0.5 g/dl solution dissolved in methylene chloride is prepared by allowing a dihydric phenol (III), or dihydric phenols (III) and (IV), to react with a carbonate precursor or a dibasic acid. An electrophotographic photoreceptor which comprises an electroconductive substrate and a photosensitive layer disposed on the electroconductive substrate and containing the polyester polymer as a charge transporting material or a binder resin. ##STR1## wherein, W is --O-- or single bond, X is a divalent group which is derived from a dihydric phenol containing a hydrazine structure, each of R.sup.25 and R.sup.26 is a halogen atom, an alkyl group, a cycloalkyl group or an aryl group, each of m and n is an integer of 0 to 4, Y is single bond, --O--, --S--, --SO--, --SO.sub.2 --, --CR.sup.27 R.sup.28 --, a 1,1-cycloalkylene group or an .alpha.,.omega.-alkylene group.
摘要:
A polyester polymer comprising repeating units (I), or repeating units (I) and (II), and having a reduced viscosity (.eta. sp/c) of 0.2 to 10.0 dl/g, measured at 20.degree. C. as a 0.5 g/dl solution dissolved in methylene chloride is prepared by allowing a dihydric phenol (III), or dihydric phenols (III) and (IV), to react with a carbonate precursor or a dibasic acid. An electrophotographic photoreceptor which comprises an electroconductive substrate and a photosensitive layer disposed on the electroconductive substrate and containing the polyester polymer as a charge transporting material or a binder resin. ##STR1## wherein, W is --O-- or single bond, X is a divalent group which is derived from a dihydric phenol containing a hydrazine structure, each of R.sup.25 and R.sup.26 is a halogen atom, an alkyl group, a cycloalkyl group or an aryl group, each of m and n is an integer of 0 to 4, Y is single bond, --O--, --S--, --SO--, --SO.sub.2 --, --CR.sup.27 R.sup.28 --, a 1,1-cycloalkylene group or an .alpha.,.omega.-alkylene group.
摘要:
A polycarbonate and a method of preparing the polycarbonate which comprises a repeating unit represented by the following general formula ##STR1## wherein each of R.sup.1 and R.sup.2 respectively is a halogen atom, an alkyl group, a cycloalkyl group or an aryl group, each of a and b is an integer of 0 to 4, and X is a single bond, --O--, --CO--, --S--, --SO--, --SO.sub.2 --, --CR.sup.3 R.sup.4 --, a 1,1-cycloalkylidene group or an .alpha.,.omega.-alkylene group, and end groups represented by the following general formulas ##STR2## wherein, R.sup.5 is a perfluoroalkyl group or substituted perfluoroalkyl group of 1 to 30 carbon atoms, Y is --CH.sub.2 --, e is an integer of 0 to 6, Z is --O--, --CO--, --OCO--, --S--, --SO--, --SO.sub.2 -- or --NHCO--, f is 0 or 1, R.sup.6 is a halogen atom, an alkyl group, a cycloalkyl group or an aryl group, and each of c and d is an integer satisfying c+d.ltoreq.5, c=1 to 5 and d=0 to 4, and an electrophotographic photoreceptor the photosensitive layer of which contains the polycarbonate of the specific structure as a component. The electrophotographic photoreceptor is produced by using a coating liquid which contains the polycarbonate and does not get cloudy (gel), and is practically useful since it maintains excellent mechanical strength, such as high plate wear, and excellent electrophotographic properties for a long period.
摘要翻译:PCT No.PCT / JP93 / 00267 Sec。 371日期:1993年10月13日 102(e)1993年10月13日PCT 1993年3月3日PCT公布。 公开号WO93 / 18081 日期:1993年9月16日。聚碳酸酯和制备聚碳酸酯的方法,其包含由下列通式(I)表示的重复单元,其中R1和R2各自为卤素原子,烷基, 环烷基或芳基,a和b各自为0〜4的整数,X为单键,-O - , - CO - , - S - , - SO - , - SO 2 - , - CR 3 R 4 - (III),(IV)表示的端基,其中,R 1,R 2,R 3, R5为1〜30个碳原子的全氟烷基或取代全氟烷基,Y为-CH2-,e为0〜6的整数,Z为-O-,-CO-,-OCO-,-S-, - SO - , - SO 2 - 或-NHCO-,f为0或1,R6为卤素原子,烷基,环烷基或芳基,c和d分别为满足c + = 5,c = 1〜5,d = 0〜4,以及电子照相感光体,其感光层含有 具体结构的聚碳酸酯作为组分。 电子照相感光体通过使用含有聚碳酸酯的涂布液而不发生浑浊(凝胶)而制造,并且实际上是有用的,因为它保持了优异的机械强度,例如高的板磨损和长时间的优异的电子照相特性。
摘要:
A polycarbonate containing repeating units (1) represented by the general formula (1), a polycarbonate molding produced by molding the polycarbonate, and an electrophotographic photoreceptor having a photosensitive layer which has a surface layer containing the polycarbonate: ##STR1## wherein R is an aliphatic unsaturation-free monovalent hydrocarbon group, R.sup.1 is a halogen atom, an alkyl group, an alkoxy group or an aryl group, X is an alkylene group or an alkyleneoxyalkylene group, X' is an alkylene group of 2 or more carbon atoms, an alkyleneoxyalkylene group or oxygen atom, a is an integer of 0 to 4, na is 0 or 1, nb is 1 or 2, nc is 1 or 2, provided na+nb+nc=3, n1, n2, n3 and n4 are 0 or an integer of 1 or more, provided n1+n2+n3+n4 is an integer of 0 to 450.
摘要:
A polycarbonate resin having crosslinking groups selected from among the functional groups mentioned above in the side chains, ends or main chain; a crosslinked polycarbonate resin made from the above resin through crosslinking; and an electrophotographic photoreceptor containing such a resin in its photosensitive layer. In said groups, h is an integer of 0 to 4, R.sup.7 and R.sup.8 are each hydrogen, alkyl or aryl; X', Y' and Z' are each a single bond, --O--, --CO--, --S--, --SO--, --SO.sub.2 -- or alkylene; R.sup.20 and R.sup.21 are each hydrogen, alkyl, cycloalkyl or aryl; R.sup.19 and R.sup.22 are each hydrogen, alkyl, cycloalkyl or aryl; R.sup.23 and R.sup.24 are each hydrogen, halogeno, alkyl, cycloalkyl, alkoxy or aryl; the sum of p and q is an integer of 1 or above; R.sup.25, R.sup.26, R.sup.27 and R.sup.28 are each hydrogen, halogeno, alkyl, alkyloxy, alkylthio, cycloalkyl, aryl, aryloxy or arylthio; n1 and n2 are each 0 or 1; R is halogeno, alkyl, alkyloxy, alkylthio, cycloalkyl, aryl, aryloxy or arylthio; and n3 and n4 are each an integer of 0 to 4.
摘要翻译:PCT No.PCT / JP96 / 03543 Sec。 371日期1998年6月2日 102(e)1998年6月2日PCT 1996年12月4日PCT PCT。 出版物WO97 / 20878 日期:1997年12月12日在侧链,末端或主链中具有选自上述官能团的交联基团的聚碳酸酯树脂; 通过交联由上述树脂制成的交联聚碳酸酯树脂; 以及在其感光层中含有这种树脂的电子照相感光体。 在所述基团中,h为0至4的整数,R 7和R 8各自为氢,烷基或芳基; X',Y'和Z'各自为单键,-O - , - CO - , - S - , - SO - , - SO 2 - 或亚烷基; R 20和R 21各自为氢,烷基,环烷基或芳基; R 19和R 22各自为氢,烷基,环烷基或芳基; R 23和R 24各自为氢,卤代,烷基,环烷基,烷氧基或芳基; p和q之和为1以上的整数, R25,R26,R27和R28各自为氢,卤代,烷基,烷氧基,烷硫基,环烷基,芳基,芳氧基或芳硫基; n1和n2各自为0或1; R是卤代,烷基,烷氧基,烷硫基,环烷基,芳基,芳氧基或芳硫基; n3和n4分别为0〜4的整数。
摘要:
A resin material for optical instruments comprising a polycarbonate having the repeating units represented by the following general formula: ##STR1## wherein X represents ##STR2## has an extremely small birefringence particularly to oblique-incident lights.
摘要:
A semiconductor device with a capacitor structure for improving area utilization comprises a plurality of electrically conductive layers and a plurality of dielectric layers. The dielectric layers and the electrically conductive layers are alternately superposed one over another, and the electrically conductive layers are alternately electrically connected.
摘要:
An organic electroluminescence device having a high brightness, a high luminescence efficiency and a long service life. The organic electroluminescence device including two opposing electrodes and having disposed therebetween a polycarbonate polymer containing a styrylamine skeleton or a diarylvinylene arylene skeleton as a repeating unit.
摘要:
A polycarbonate polymer containing repeating units represented by the following general formula ##STR1## wherein: X is selected from single bond, ##STR2## wherein: R.sup.1 and R.sup.2 are each independently selected from hydrogen atom; alkyl radical of 1 to 6 carbon atoms; cycloalkyl radical of 5 to 6 carbon atoms; ##STR3## wherein p is an integer having a value of from 0 to 3; phenyl radicals substituted at para position by a substituent selected from alkoxy radicals of 1 to 5 carbon atoms, phenoxy radicals, or halogen radicals; or p-biphenylyl radical, --CH.sub.2).sub.q wherein q is an integer having a value of from 2 to 10; or ##STR4## wherein r is an integer having a value of from 4 to 8, and having a reduced viscosity [.eta.sp/c] of at least 0.2 dl/g as measured in methylene chloride at a concentration of 0.5 g/dl at 20.degree. C.Such polycarbonates exhibit excellent optical properties such as high birefringence, and are useful as materials for optical devices.Also, a process for preparing the polycarbonates and novel dihydric phenols which can be used as materials for the polycarbonates are disclosed.
摘要:
A disc changer for sequentially playing back a plurality of discs such as compact discs has a circular tray rotatably mounted on a base for supporting a plurality of discs replacably mounted on a horizontal surface. A drive mechanism rotates the tray and stops the tray to position one of the discs in a playback position. A recorded signal is reproduced from the disc in the playback position by a pickup. The pickup is vertically moved and stopped in a predetermined vertical position by a lifting/lowering mechanism. A pickup cover is disposed over the tray in covering relation to the pickup and the disc in the playback position. The disc changer also has a dust cover hinged to the base, for covering at least the tray, the dust cover having a transparent window extending over the tray.