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| Number | Title | Issue Date |
| 7393467 | Wholly aromatic liquid-crystalline polyester and method for preparing the same Provided is a liquid-crystalline polyester with good properties obtainable by subjecting a prepolymer consisting of the repeating units represented by formulae (I), (II), (III) and (IV): to heat treatment in a substantially... | 07/01/2008 |
| 7355071 | Method for preparing 2,6-naphthalene dicarboxylic acid Disclosed is an improved method for preparing 2,6-naphthalene dicarboxylic acid from di-lower alkyl 2,6-naphthalene dicarboxylate, which is characterized in that hydrolyzing di-lower alkyl 2,6-naphthalene dicarboxylate in a specified amount of water in the presence ... | 04/08/2008 |
| 7335318 | Method for manufacturing wholly aromatic liquid-crystalline polyester resin The present invention provides a method for manufacturing a wholly aromatic liquid-crystalline polyester resin comprising the steps of: 1) acylating the hydroxy group of major monomer components selected from the group consisting o... | 02/26/2008 |
| 7304182 | Crystalline parahydroxybenzoic acid anhydride and process for preparing the same The present invention provides a process for preparing crystalline parahydroxybenzoic acid anhydride, comprising the step of precipitating and isolating parahydroxybenzoic acid in an aqueous solvent at a temperature equal to or above the transition temperature of pa... | 12/04/2007 |
| 7238769 | Method for joining liquid-crystalline polyester resin composition parts and jointed article made of liquid-crystalline polyester resin composition The present invention provides a method for joining liquid-crystalline polyester resin composition parts, characterized in that the melting point of the liquid crystalline polyester resin measured by differential scanning calorimeter is 190-250° C. and that the par... | 07/03/2007 |
| 7179401 | Thermotropic liquid-crystalline polymer A thermotropic liquid crystalline polymer, which is obtainable by copolymerizing a trifunctional hydroxynaphthalene carboxylic acid represented by the general formula (I) and/or reactive derivative thereof with other polymerizing monomer(s) | 02/20/2007 |
| 7169523 | Charge controllers The present invention provides a safe charge control agent which exhibits an excellent negative chargeability and excellent dispersibility in and compatibility with binder resins, and is even applicable for col or toners. Specifically, the charge control agent consi... | 01/30/2007 |
| 7102028 | Method for producing 3,5-di-tert-butyl-4-hydroxybenzoic acid The present invention provides a method for producing 3,5-di-tert-butyl-4-hydroxybenzoic acid comprising: (1) providing 2,6-di-tert-butylphenol which may contain up to 0.5% by weight of 3,3′,5,5′-tetra-tert-butyl-4,4′-dihydroxybiphenyl; | 09/05/2006 |
| 7074536 | Alkylenebisnaphtol derivative and charge control agent which consists of the same The present invention provides an alkylenebisnaphthol derivative represented by formula [I]: and a salt thereof. The compound of the present invention has an excellent triboelectric charge property and useful as ... | 07/11/2006 |
| 7030261 | Method for preparing 2-hydroxy-6-ureidocarbonyl naphthalene derivative Disclosed is a method for preparing a 2-hydroxy-6-ureidocarbonyl naphthalene derivative. The method comprises the step of reacting 2-hydroxy-6-aminocarbonyl naphthalene and a isocyanate in an organic solvent at a temperature of 90–200° C. According to the present... | 04/18/2006 |
| 6984712 | Liquid-crystal polyester resin The present invention provides a liquid-crystalline polyester resin which comprises monomer units derived from 2-hydroxy-3-naphthoic acid and/or 2-hydroxynaphthalene-3,6-dicarboxylic acid in an amount of 1-5000 mmol % based on the total monomer components of the res... | 01/10/2006 |
| 6891072 | Process for production of dimers or aromatic monohydroxyl compounds The present invention provides a method for preparing dimer of a monohydroxy aromatic compound. In the method of the present invention, oxidative coupling reaction of a monohydroxy aromatic compound represented by formula [I]: Ar—OH [I] | 05/10/2005 |
| 6863737 | Crystalline mixture solid containing maltitol and preparation therefor A crystalline mixture solid containing maltitol having an oil absorptivity of 0.1 to 6.9 wt % and a bulk density of 0.60 to 0.75 g/cc when it is ground and classified to ensure that at least 70 wt % of the obtained particles should have a particle size of 16 to 50 m... | 03/08/2005 |
| 6849742 | Binaphthol derivative and process for producing the same The present invention provides a binaphthol compound represented by formula [1]: and a salt thereof. The binaphthol compound of the present invention is useful for manufacturing antiseptic compounds or chiral catalysts... | 02/01/2005 |
| 6802989 | Liquid crystal polyester resin A liquid crystal polyester resin comprising 1 to 500 mmol % of a recurring unit derived from 4-hydroxyisophthalic acid and/or salicylic acid as a comonomer and 10 to 5,000 ppm in terms of an alkali metal of an alkali metal compound. This resin has excellent colorabi... | 10/12/2004 |
| 6755991 | Aromatic dicarboxylic acid composition and liquid crystalline polyester resin made from the same An aromatic dicarboxylic acid composition, essentially consisting of (a) at least one aromatic dicarboxylic acid; (b) 1-3000 ppm of at least one compound selected from the group consisting of 6-formyl-2-naphthoic acid, 6-methoxycarbonyl-2-naphthoic acid and trimelli... | 06/29/2004 |
| 6755914 | Crystalline mixture solid composition and preparation thereof A crystalline mixture solid composition comprising α-D-glucopyranosyl-1,1-mannitol (GPM), α-D-glucopyranosyl-1,6-sorbitol (GPS-6) and a small amount of α-D-glucopyranosyl-1,1-sorbitol (GPS-1) and a production process therefor. The above crystalline mixture solid ... | 06/29/2004 |
| 6746541 | Crystalline mixture solid composition and process for preparation thereof A crystalline mixture solid composition which has almost no hygroscopicity, is easy to handle and dissolve and hardly worn by abrasion, and comprises α-D-glucopyranosyl-1,1-mannitol and α-D-glucopyranosyl-1,6-sorbitol and may further comprise ... | 06/08/2004 |
| 6673962 | Granule of parahydroxybenzoic acid or parahydroxybenzoic ester and process for producing the same Granular product of parahydroxybenzoic acid or its ester which exhibits well suppressed dusting and caking tendency and a process for preparing the product are provided. The granular product of parahydroxybenzoic acid or its ester according to the instant... | 01/06/2004 |
| 6664341 | Liquid-crystal polyester resin composition A liquid crystal polyester resin composition which suppresses the formation of a blister caused by a heat treatment at a high temperature and has excellent moldability. This composition comprises (A) a liquid crystal polyester comprising at least two arom... | 12/16/2003 |
| 6656386 | Wholly aromatic heat-stable liquid crystalline polyester resin composition with improved melt flowability A wholly aromatic liquid crystalline polyester resin composition comprising about 97-60 parts by weight of a wholly aromatic polyester resin (A) having melting peak determined by DSC equal to or higher than 310° C.; and about 3-40 parts by weight of a wh... | 12/02/2003 |
| 6639092 | Metal salt of binaphthol derivative and method for preparing the same Novel metal salts of binaphthol derivative are provided. The metal salts of the present invention are those represented by the formula of either (1) or (2): ##STR1## The present invention also provides a method for preparing the same from the corresp... | 10/28/2003 |
| 6562998 | Granules of 2-hydroxynaphthalene-3-carboxylic acid and method for preparing the same Granular product of 2-hydroxynaphthalene-3-carboxylic acid with well-suppressed dusting tendency, and process for preparing the same is provided. Granular product of 2-hydroxynaphthalene-3-carboxylic acid having an average particle size of 150 μm or more... | 05/13/2003 |
| 6548703 | Toning agent A toning agent for an azo pigment, an azo pigment with a modified tone, and process for preparing the same are provide. 2-hydroxynaphthalene-3,6-dicarboxylic acid or a derivative thereof is admixed with a primary coupler component for an azo pigment and t... | 04/15/2003 |
| 6451109 | Columnar crystals of 6-hydroxy-2-naphthoic acid and process for manufacturing the same A process for manufacturing columnar crystals of 6-hydroxy-2-naphthoic acid comprising the steps of, dissolving crude 6-hydroxy-2-naphthoic acid product in an aqueous solvent, adding crystalline 3-hydroxy-2,7-naphthoic acid or columnar crystals as seed cr... | 09/17/2002 |
| 6451988 | Naphthol derivatives Novel naphthol derivatives, and various azo compounds and metal complexes prepared by using the derivatives are provided. The instant invention provides naphthol derivatives represented by general formula (1); ##STR1## wherein at least one of Y1 | 09/17/2002 |
| 6409812 | AZO compounds and process for producing the same A diamide type azo compound represented by the general formula (I): ##STR1## which is derived from 2-hydroxy-3,6-dicarboxylic acid and at least one of the amide moieties in the compound is an aliphatic amide moiety, various use of the same and process for... | 06/25/2002 |
| 6403827 | Crystal of 2-hydroxynaphthalene-3-carboxylic acid and process for the preparation thereof The present invention provides crystalline 2-hydroxynaphthalene-3-carboxylic acid (BON) characterized in that the average particle size is equal to or more than 157 μm and the proportion of the particles of which particle size is less than 74 μm is... | 06/11/2002 |
| 6388045 | Liquid-crystalline polymer Provided is a liquid crystalline polymer which is obtained by copolymerizing at least one polyfunctional aromatic monomer selected from the group consisting of the compounds represented by the formulae (I), (II) and (III) below with at least one polymeriz... | 05/14/2002 |
| 6284924 | Compounds A novel compound represented by the general formula (1) ##STR1## or salts thereof. The compound is useful as a structural component of polymers such as polyesters and polyamides. The compound wherein Y1, Y2, Y3, and/or Y | 09/04/2001 |
| 6252104 | Naphthol derivatives and process for producing the same A naphthol derivative represented by the general formula (I), [wherein Y and Y' indicate --(CONH)n --X or --COR; X is a phenyl group, a naphthyl group, an anthraquinonyl group, a benzimidazolonyl group or a carbazolyl group; R is a hydroxyl gro... | 06/26/2001 |
| 6239263 | Water-soluble azo compounds and process for the preparation thereof Novel water-soluble azo compounds useful as raw materials for preparing dyes excellent in dyeing properties and fastness and prepared from a coupler consisting of 2-hydroxynaphthalene-3,6-dicarboxylic acid or an ester thereof or an amide derivative of the... | 05/29/2001 |
| 6194608 | Process for separating and purifying alkali metal salts of hydroxynaphthalenecarboxylic acids The present invention provides a process for separating and purifying alkali metal salts of hydroxynaphthalenecarboxylic acids, in which alkali metal salt(s) of hydroxynaphthalenecarboxylic acid(s) are separated and purified from a mixture of alkali metal... | 02/27/2001 |
| 6133475 | Process for producing 2-hydroxynaphthalene-3,6-dicarboxylic acid The present invention relates to a process for preparing 2-hydroxynaphthalene-3,6-dicarboxylic acid which comprises reacting potassium 2-naphtholate and carbon dioxide at a temperature 290° C. or higher under a pressure 30 kg/cm2 (G) or higher... | 10/17/2000 |
| 6084101 | Naphtol derivative and process for producing the same The present invention relates to a novel 2-hydroxy-naphthalene-3,6-dicarboxylic acid derivative. The compound is useful as a raw material for dyes, pigments, photosensitive materials and the like.... | 07/04/2000 |
| 6072042 | Bis(aminocarbonylnaphthol) derivative The present invention provides a bis (aminocarbonylnaphthol) derivative which is useful as a raw material for novel azo pigments by bisamidation of each one carboxyl group of two 2-hydroxynaphthalene-3,6-dicarboxylic acids using an aliphatic or aromatic d... | 06/06/2000 |
| 6020470 | Water-soluble azo compounds and process for producing the same The present invention provides novel water-soluble azo compounds derived from 2-hydroxynaphthalene-3,6-dicarboxylic acid or derivatives thereof and diazonium salts having sulfo group(s). These compounds are useful as raw materials for dyes having excellen... | 02/01/2000 |
| 6005085 | Condensed azo compounds and process for preparing the same The present invention provides novel condensed azo compounds using bisamide compounds of 2-hydroxynaphthalene-3,6-dicarboxylic acid, amide, or ester as the couplers, which have excellent properties such as excellent water resistance, chemical resistance, ... | 12/21/1999 |
| 5973126 | Azo compounds and process for producing the same A monoazo compound synthesized using 2-hydroxynaphthalene-3,6-dicarboxylic acid (or salt thereof), an amide, an ureide or an ester thereof as a coupler is novel, and is superior in water resistance, chemical resistance and solvent resistance. The present ... | 10/26/1999 |
| 5965715 | Bisazo compounds and process for the preparation thereof The invention provides novel bisazo compounds which is obtained by coupling two molecules of a 2-hydroxynaphthalene-3,6-dicarboxylic acid derivative and a compound having two diazo groups in its molecule, as well as a process for producing the same. The p... | 10/12/1999 |
