Abstract: A 3,6-diphenylcarbazole compound, which has a specific formula and realizes an organic electroluminescent device having high durability and high luminous efficiency. An electroluminescent device which includes an anode; a cathode which faces the anode; and at least one layer including a luminescent layer, optionally a hole transporting layer and an electron transporting layer, which is located between the anode and the cathode, wherein the at least one layer includes the 3,6-diphenylcarbazole compound.

Abstract: a thermosensitive recording material comprising a thermosensitive layer provided on a substrate, and the thermosensitive layer comprises as main ingredients a leuco dye and a developer to make colored state of said leuco dye when heated, wherein the developer is an oligomer composition obtained from the reaction of a polyvalent isocyanate compound represented by following Formula (I) with an aromatic amine represented by following Formula (II)); where X represents a try- or more- valent group, a represents an integer numeral of 3 or more, b and c represent respectively integer numerals in the range of 0 to 5 and they satisfy a relation of b+c=1 to 5, Z represents hydrogen atom, alkyl group, allyl group or aryl group, and the aryl group may include condensed ling structure thereof, and d represents an integer numeral in the range of 0 to 4.

Abstract: A thermosensitive recording material comprising a thermosensitive layer provided on a substrate, and the thermosensitive layer comprises as main ingredients a leuco dye and a developer to make colored state of said leuco dye when heated, wherein the developer is an oligomer composition obtained from the reaction of a polyvalent isocyanate compound represented by following Formula (I) with an aromatic amine represented by following Formula (II); X(NCO)a??Formula (I) where X represents a try- or more-valent group, a represents an integer numeral of 3 or more, b and c represent respectively integer numerals in the range of 0 to 5 and they satisfy a relation of b+c=1 to 5, Z represents hydrogen atom, alkyl group, allyl group or aryl group, and the aryl group may include condensed ling structure thereof, and d represents an integer numeral in the range of 0 to 4.

Abstract: a thermosensitive recording material comprising a thermosensitive layer provided on a substrate, and the thermosensitive layer comprises as main ingredients a leuco dye and a developer to make colored state of said leuco dye when heated, wherein the developer is an oligomer composition obtained from the reaction of a polyvalent isocyanate compound represented by following Formula (I) with an aromatic amine represented by following Formula (II);

Abstract: An aryl amine polymer is provided which contains a specific repeat unit, its use in preparing an organic semiconductor material which contains the aryl amine polymer and an additional specific compound and in the preparation of organic light emitting devices (OLED), organic thin film transistors (TFT) and so on, along with an organic TFT including a substrate, an organic semiconductor layer which contains the organic semiconductor material and is located overlying the substrate, an electrode pair of a source electrode and a drain electrode; and a third electrode.

Abstract: A light-permeable thermosensitive recording material having a light permeable support and a thermosensitive recording layer formed thereon and including a leuco dye, a color developer for the leuco dye, and a binder resin, wherein the developer is a compound represented by the following formula (1): wherein R1 represents an alkyl group having 4-16 carbon atoms or an aminoalkyl group having 4-16 carbon atoms.

Abstract: An erasable recording material including a substrate, and an erasable recording layer which is formed overlying the substrate and in which image information is repeatedly recorded and erased, and optionally includes an undercoat layer formed between the substrate and the recording layer, a protective layer formed overlying the recording layer and an intermediate layer formed between the recording layer and the protective layer, wherein the erasable recording material further includes one or more markers which are used for inputting image information additionally written on the recording material. An information recording system and method are also provided in which additional information written on the erasable recording material, in which image information is previously recorded, is incorporated to the previously recorded image information.

Abstract: A thermosensitive recording material comprising a thermosensitive layer provided on a substrate, and the thermosensitive layer comprises as main ingredients a leuco dye and a developer to make colored state of said leuco dye when heated, wherein the developer is an oligomer composition obtained from the reaction of a polyvalent isocyanate compound represented by following Formula (I) with an aromatic amine represented by following Formula (II); 1

Abstract: An erasable recording material including a substrate, and an erasable recording layer which is formed overlying the substrate and in which image information is repeatedly recorded and erased, and optionally includes an undercoat layer formed between the substrate and the recording layer, a protective layer formed overlying the recording layer and an intermediate layer formed between the recording layer and the protective layer, wherein the erasable recording material further includes one or more markers which are used for inputting image information additionally written on the recording material. An information recording system and method are also provided in which additional information written on the erasable recording material, in which image information is previously recorded, is incorporated to the previously recorded image information.

Abstract: A light-permeable thermosensitive recording material having a light permeable support and a thermosensitive recording layer formed thereon and including a leuco dye, a color developer for the leuco dye, and a binder resin, wherein the developer is a compound represented by the following formula (1): 1

Abstract: A reversible thermosensitive coloring composition including an electron donating coloring agent and an electron accepting color developer, wherein the composition achieves a colored state when heated at a temperature not lower than a coloring temperature and then cooled at a cooling speed (a), and the composition in the colored state achieves a non-colored state when heated at a temperature lower than the coloring temperature and not lower than an erasing temperature, or when heated at a temperature not lower than the coloring temperature and then cooled relatively slowly compared to the cooling speed (a), and wherein the electron accepting color developer includes a phenolic compound having the following formula (1): wherein n is an integer of from 1 to 3; m is an integer of from 1 to 20; r is 0 or an integer of from 1 to 3; X and Y independently represent a divalent group including a hetero atom; R1 represents a hydrocarbon group having from 1 to 20 carbon atoms; and R2 represents a hydroc

Abstract: A reversible thermosensitive coloring composition including an electron donating coloring agent and an electron accepting color developer, wherein the composition achieves a colored state when heated at a temperature not lower than a coloring temperature and then cooled at a cooling speed (a), and the composition in the colored state achieves a non-colored state when heated at a temperature lower than the coloring temperature and not lower than an erasing temperature, or when heated at a temperature not lower than the coloring temperature and then cooled relatively slowly compared to the cooling speed (a), and wherein the electron accepting color developer includes a phenolic compound having the following formula (1): wherein n is an integer of from 1 to 3; m is an integer of from 1 to 20; r is 0 or an integer of from 1 to 3; X and Y independently represent a divalent group including a hetero atom; R1 represents a hydrocarbon group having from 1 to 20 carbon atoms; and R2 represents a hydroc

Abstract: A reversible thermosensitive recording medium includes a reversible thermosensitive recording layer including a matrix resin and an organic low-molecular-weight material dispersed in the matrix resin, of which transparency is reversibly changeable depending upon the temperature thereof, and having (1) a transparentizing upper-limit temperature of 125° C. or more, (2) a temperature difference of 20° C. or less between said transparentizing upper-limit temperature and an opaqueness initiation lower-limit temperature, and (3) a transparentizing initiation temperature of less than 95° C., and a method of recording and erasing images, using the recording medium, a method of producing the recording medium, and the application thereof a card, a label, writable or rewritable disk cartridge, disk and tape cassette are proposed.

Abstract: An erasable recording material including a substrate, and an erasable recording layer which is formed overlying the substrate and in which image information is repeatedly recorded and erased, and optionally includes an undercoat layer formed between the substrate and the recording layer, a protective layer formed overlying the recording layer and an intermediate layer formed between the recording layer and the protective layer, wherein the erasable recording material further includes one or more markers which are used for inputting image information additionally written on the recording material. An information recording system and method are also provided in which additional information written on the erasable recording material, in which image information is previously recorded, is incorporated to the previously recorded image information.

Abstract: A reversible thermosensitive recording medium has a support, and a reversible thermosensitive recording layer formed thereon containing a reversible thermosensitive coloring composition of an electron-donating coloring compound and an electron-accepting compound, capable of reversibly assuming a color-developed state or a decolorized state, and a decolorization accelerating agent of formula (I): wherein p is an integer of 0 to 3; q and r are each independently an integer of 1 to 3; X1, X2, and X3 are each a bivalent hetero-atom-containing group; R1, R2, and R3 are each a hydrocarbon group with 1 to 22 carbon atoms, provided that at least one of R1, R2 or R3 is an aliphatic hydrocarbon group having 8 or more carbon atoms; and R4 is a hydrogen atom, hydroxyl group or an aliphatic hydrocarbon group having 1 to 8 carbon atoms. The above recording medium is used as an image display medium in an image display apparatus, and as a rewritable paper.

Abstract: A reversible thermosensitive recording medium is capable of assuming a first color in a first temperature range which is above room temperature, having a first color assuming initiation temperature and a first color assuming upper-limit temperature, and assuming a second color when heated to a second temperature range which is above the first temperature range and then cooled, having a second color assuming lower-limit temperature, (a) the first color assuming upper-limit temperature being 125° C. or more, (b) the difference between the first color assuming upper-limit temperature and the second color assuming lower-limit temperature being 20° C. or less, and (c) the first color assuming initiation temperature being 95° C. or more, and a method of recording and erasing images, using the recording medium, a method of producing the recording medium, and the application thereof a card, a label, writable or rewritable disk cartridge, disk and tape cassette are proposed.

Abstract: A reversible thermosensitive coloring composition including an electron donating coloring agent and an electron accepting color developer, wherein the composition achieves a colored state when heated at a temperature not lower than a coloring temperature and then cooled at a cooling speed (a), and the composition in the colored state achieves a non-colored state when heated at a temperature lower than the coloring temperature and not lower than an erasing temperature, or when heated at a temperature not lower than the coloring temperature and then cooled relatively slowly compared to the cooling speed (a), and wherein the electron accepting color developer includes a phenolic compound having the following formula (1): 1

Abstract: A reversible thermosensitive coloring composition including an electron donating coloring agent and an electron accepting color developer, wherein the composition achieves a colored state when heated at a temperature not lower than a coloring temperature and then cooled at a cooling speed (a), and the composition in the colored state achieves a non-colored state when heated at a temperature lower than the coloring temperature and not lower than an erasing temperature, or when heated at a temperature not lower than the coloring temperature and then cooled relatively slowly compared to the cooling speed (a), and wherein the electron accepting color developer includes a phenolic compound having the following formula (1): 1

Abstract: A reversible thermosensitive recording material which includes a recording layer including an electron donating coloring agent and an electron accepting coloring developer and in which an image is reversibly formed and erased by appropriately heating and cooling the recording layer, wherein the recording layer further includes an erasure promoter including one or more secondary amide group having the following formulas (1), (2) or (3): wherein each of R1, R2, R3, R4 and R5 independently represents a hydrocarbon group which is optionally substituted and which may be saturated or unsaturated, and wherein R1 and R2 are optionally combined to form a ring which may include one or more of a nitrogen atom, an oxygen atom and a sulfur atom. Alternatively, the erasure promoter may include two or more secondary amide groups having formula (1), (2) or (3).

Abstract: A reversible thermosensitive coloring composition including an electron donating coloring agent and an electron accepting color developer, wherein the composition achieves a colored state when heated at a temperature not lower than a coloring temperature and then cooled at a cooling speed (a), and the composition in the colored state achieves a non-colored state when heated at a temperature lower than the coloring temperature and not lower than an erasing temperature, or when heated at a temperature not lower than the coloring temperature and then cooled relatively slowly compared to the cooling speed (a), and wherein the electron accepting color developer includes a phenolic compound having the following formula (1): wherein n is an integer of from 1 to 3; m is an integer of from 1 to 20; r is 0 or an integer of from 1 to 3; X and Y independently represent a divalent group including a hetero atom; R1 represents a hydrocarbon group having from 1 to 20 carbon atoms; and R2 represents a hydroc