- CRYSTAL POLYMORPH OF 9,9-BIS(6-HYDROXY-2-NAPHTHYL)FLUORENE AND METHOD FOR PRODUCING THE SAME
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PROBLEM TO BE SOLVED: To provide a novel polymorph of BNF (crystal polymorph) that has an excellent heat stability or storage stability in a high temperature environment, and to provide a method for producing the same. SOLUTION: By crystallizing BNF from a mixed solvent of aromatic hydrocarbons and at least one solvent selected from phenols and ketones, a crystalline polymorph δ having diffraction peaks at diffraction angles 2θ=9.6±0.2°, 20.6±0.2° and 21.3±0.2° in powder X-ray diffraction pattern is obtained. The crystalline polymorph δ may also have diffraction peaks at at least one angle selected from diffraction angles 2θ=9.2±0.2°, 9.8±0.2°, 17.1±0.2°, 23.3±0.2° and 23.8±0.2°. SELECTED DRAWING: Figure 7 COPYRIGHT: (C)2021,JPO&INPIT
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Paragraph 0053-0055
(2020/10/30)
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- Preparation of 9,9-bis(6-hydroxynaphthalene-2-yl) fluorene crystal without complex residual solvent
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The invention discloses a 9,9-bis(6-hydroxynaphthalene-2-yl) fluorene crystal without complex residual solvent and is obtained through beating a low-boiling-point chlorine-containing solvent and carrying out vacuum drying treatment. The thermal gravimetric analysis (TGA) spectrum shows that no complex residual solvent exists, and the melting endothermic peak on the differential scanning calorimeter (DSC) spectrum is 260-266 DEG C. The characteristic 2-theta values of the X-ray powder diffraction (XRPD) analysis are as follows: 8.3+/-0.20 (48), 9.7+/-0.20 (50), 17.3+/-0.20 (74), 19.3+/-0.20 (100), 19.7+/-0.20 (72), 20.0+/-0.20 (61), 22.6+/-0.20 (48) and 26.9+/-0.20 (32). The crystal without complex residual solvent has the advantages that when materials of polycarbonate, polyester, polyimide and the like are prepared by adopting a solvent-free polycondensation process, the release and dissipation of residual toxic and harmful solvents are prevented, the air environment is prevented frombeing polluted, and the quality performance of polymer materials is not seriously influenced by the release of encapsulated solvent in the reaction.
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Paragraph 0017-0020
(2018/10/11)
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- 9,9-double (6-hydroxynaphthalene-2-yl) fluorene solvent compound crystal and its preparation
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The invention discloses a solvate crystal of 9,9-bis(6-hydroxy naphthalene-2-group) fluorene and preparation thereof. A solvate crystal prepared from the 9,9-bis(6-hydroxy naphthalene-2-group) fluorene and acetonitrile is a solvate crystal I of the 9,9-bis(6-hydroxy naphthalene-2-group) fluorene, and a solvate crystal prepared from the 9,9-bis(6-hydroxy naphthalene-2-group) fluorene and ethyl acetate is a solvate crystal II of the 9,9-bis(6-hydroxy naphthalene-2-group) fluorene. The solvate crystal I and solvate crystal II of the 9,9-bis(6-hydroxy naphthalene-2-group) fluorene, which is prepared through the invention achieve the maximum melting endothermic peaks of 261-266 DEG C and the stacking density of 0.4 g/mL after being desolvated, is basically unchanged in color and purity after being preserved at 40 DEG C for three months due to high heat stability and has the advantages of high stacking density, good flowability and easiness for loaded material transfer.
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Paragraph 0021; 0022
(2017/01/12)
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- 6, 6-(9-fluorenylidene)-di (2-naphthol) and its manufacturing method of crystal polymorph
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PROBLEM TO BE SOLVED: To provide a novel crystalline polymorph of 6,6-(9-fluorenylidene)-di(2-naphthol) excellent in ease of handling and ease of work. SOLUTION: In the crystalline polymorph of 6,6-(9-fluorenylidene)-di(2-naphthol), (1) a crystalline polymorph α having diffraction peaks at 16.78°, 19.18°, and 19.58°; and (2) a crystalline polymorph β having diffraction peaks at 17.84°, 19.92°, and 22.92° in the powder X-ray diffraction pattern have high bulk density and excellent sliding properties and improves ease of handling and ease of work. COPYRIGHT: (C)2013,JPO&INPIT
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Paragraph 0048; 0049; 0050
(2016/12/22)
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