子分类：
| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 181 | Helichromic-smectic liquid crystal compositions and display cells | US436030 | 1982-10-22 | US4514045A | 1985-04-30 | William A. Huffman; Harvey A. Brown |
| A composition for use in thermally-addressable liquid crystal display devices, comprising a smectic liquid crystal material and a helichromic compound possessing both a chromophoric moiety and an optically-active moiety. The helichromic compound is a circularly dichroic dye capable of propagating incident visible light in a circularly polarized manner so that all polarizations of the incident light are absorbed. The composition comprising the helichromic compound can be utilized in thermally-addressable liquid crystal display devices to provide a display which operates at lower voltages, with faster response times, and higher contrast ratios. | ||||||
| 182 | Disazo electrophotographic light-sensitive media | US238281 | 1981-02-25 | US4359515A | 1982-11-16 | Kazuharu Katagiri; Katsunori Watanabe; Shigeto Ohta; Shozo Ishikawa; Makoto Kitahara |
| An electrophotographic light-sensitive medium comprising a light-sensitive layer containing a dis-azo compound represented by Formula (1) ##STR1## wherein A represents a single chemical bond, a divalent hydrocarbon group containing a conjugated double bond, a divalent hydrocarbon group containing a nitrogen atom in a conjugated double bond, or a divalent heterocyclic group which may be condensed with a benzene ring or substituted and forms a conjugated double bond system in combination with the adjacent azomethine groups, and B and B', which may be the same or different, each represents a coupler having aromatic properties. | ||||||
| 183 | Production of pigments | US203940 | 1980-11-04 | US4341701A | 1982-07-27 | David T. Pechey; John H. Coy |
| A process for producing monoazo or disazo pigments, which process comprises:(a) adding to a solution of a diazonium and/or tetrazonium salt of an aromatic or heterocyclic amine a solution or suspension containing 0.1-50% by weight of the theoretically required total weight of one or more coupling components, and(b) using the product from step (a) as an additive in the production of a monoazo pigment, a disazo pigment or a mixture of monoazo and disazo pigments.Compared with products produced by conventional methods, the pigments produced in the manner described above have a greater coloring strength, improved transparency, improved flow properties, and a higher degree of dispersibility. | ||||||
| 184 | Disazo and polyazo dyestuffs | US950178 | 1978-10-10 | US4254025A | 1981-03-03 | Erich Kramer |
| New disazo and polyazo dyestuffs which, in the form of the free acid, correspond to the general formula ##STR1## wherein K, R, m and n have the meaning indicated in the description,the use of these dyestuffs for dyeing and printing cellulose fibre materials and leather, and concentrated solutions containing azo dyestuffs according to formula (I). | ||||||
| 185 | Continuous azo coupling process | US11049 | 1979-02-09 | US4252718A | 1981-02-24 | John H. Atherton; Ian Hodgkinson |
| A process for the preparation of an aqueous slurry of a water-insoluble azo compound which comprises continuously mixing together, in a reaction zone from which the slurry is continuously removed, a first stream containing a diazonium compound resulting from the diazotization of a heterocyclic or weakly basic benzenoid amine in an acid medium, hereinafter referred to as the diazo component, and a second stream containing a compound capable of coupling with the diazo component under the conditions existing in the reaction zone to form a water-insoluble azo compound hereinafter referred to as the coupling component. | ||||||
| 186 | Trisazo pigments containing two barbituric acid coupling components | US706369 | 1976-07-19 | US4093613A | 1978-06-06 | Stefan Hari; Armand Roueche |
| Azo pigments of the formula ##STR1## in which R.sub.1 and R.sub.2 denote H atoms, alkyl groups with 1-6 C atoms or aryl radicals, Y denotes an O or S atom or an imino group, Z denotes an O atom or an imino group and Y.sub.1 -Y.sub.4 denote H or halogen atoms, alkyl or alkoxy groups containing 1-4 C atoms, or nitro, trifluoromethyl or alkoxycarbonyl groups containing 2-4 C atoms are valuable pigments coloring plastics, melts, spinning solutions, lacquers paints and printing inks in yellow to red shades of high tinctorial strength and excellent fastness properties. | ||||||
| 187 | Heterocyclic containing disazo compounds | US408769 | 1973-10-23 | US3931142A | 1976-01-06 | John Lenoir; Paul Tschopp; Hansrolf Loeffel; DE Montmollin: Rene |
| Polyazo dyestuffs of the formulaA--N=N--M--D--M'--N=N--A'wherein A and A' each represents a 2(8)-amino-8(2)-hydroxynaphthalene radical further substituted with a sulphonic acid group, M and M' each represents a substituted 1,4- or 1,3-phenylene radical and D represents an organic radical bonded in the manner of an amide to M and M', said dyestuffs containing at least two sulphonic acid groups in the molecule, as well as photographic material containing in at least one layer a polyazo dyestuff of the above formula are described. | ||||||
| 188 | Photographic silver halide elements containing tetrakisazo dyes | US3542555D | 1967-09-15 | US3542555A | 1970-11-24 | CHECHAK JONAS J |
| 189 | Disazo dyestuffs containing the phenylazo-phenyl-azo-phenyl moiety | US3451991D | 1965-06-16 | US3451991A | 1969-06-24 | KLEINER HELMUT |
| 190 | Process for the production of black dyeings on cellulose fabrics | US40295264 | 1964-10-09 | US3301629A | 1967-01-31 | BERNHARD KRAMER; GERD HENES |
| 191 | Quaternary salts of triazene azo dyestuffs | US29947763 | 1963-08-02 | US3290280A | 1966-12-06 | JACQUES VOLTZ; WERNER BOSSARD |
| 192 | Copper complex compounds of trisazo dyestuffs | US79367259 | 1959-02-17 | US3030351A | 1962-04-17 | ALBERT DEMAGISTRI; HANS ISCHER; WALTER WEHRLI |
| 193 | Metallisable azo dyestuffs | US54408255 | 1955-10-31 | US2861066A | 1958-11-18 | FRANCIS ANDREW HERBERT; CHARLES BOYD HAROLD; RONALD DAVIES ROBERT |
| 194 | Tris and polyazo dyes from tetrazotized 0:0' dihydroxybenzidine | US43251642 | 1942-02-26 | US2428130A | 1947-09-30 | FRITZ STRAUB; JAKOB BRASSEL; PETER PIETH |
| 195 | Polyazo compounds and material colored therewith | US27572039 | 1939-05-25 | US2216446A | 1940-10-01 | MCNALLY JAMES G; DICKEY JOSEPH B |
| 196 | Polyazo dyestuffs | US22624738 | 1938-08-23 | US2190750A | 1940-02-20 | PAUL ZERVAS |
| 197 | Azo dyes | US19197438 | 1938-02-23 | US2155685A | 1939-04-25 | ROSSANDER SWANIE S |
| 198 | Polyazo dyestuffs | US10714936 | 1936-10-23 | US2116206A | 1938-05-03 | HANS KRZIKALLA; BERND EISTERT |
| 199 | Azo dye | US46506430 | 1930-06-30 | US1904820A | 1933-04-18 | RAINALD BRIGHTMAN |
| 200 | Compounds having an affinity for cotton and being diazotizable on the fiber | US34065429 | 1929-02-16 | US1823743A | 1931-09-15 | GEORG KALISCHER; WERNER LANGE |
QQ群二维码
意见反馈
意见反馈