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1.发明公开
公开(公告)号：EP0147634A2
公开(公告)日：1985-07-10
申请号：EP84114195.5
申请日：1984-11-23
发明人： Kamide, Kenji , Okajima, Kunihiko
摘要： Described is a cellulose dope which is an aqueous alkali solution containing substantially at least 3% by weight of cellulose having a degree of polymerization of at least 100, wherein in the 13 C-NMR spectrum of the cellulose, the C 4 -position carbon peak is found at a magnetic field higher by at least 7 ppm than the magnetic field of the C 4 -position carbon peak of solid cellulose attributed to the strong intramolecular hydrogen bond. This dope is prepared by maintaining a mixture comprising 100 weight parts of cellulose, which may have any crystal form, and 10 to 1000 weight parts of a hydrogen bond-cleaving solution at 100°C to 350°C under a pressure of 10 to 250 atmospheres, promptly exposing the mixture to the ambient atmosphere, mixing the resulting cellulose with an aqueous alkali solution maintained at a temperature not higher than 50°C, and then stirring the mixture at a temperature not higher than 10°C to dissolve the cellulose in the aqueous alkali solution. The dope may be used for the manufacture of a shaped article or for coating.
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2.发明授权
公开(公告)号：EP0147634B2
公开(公告)日：1996-06-26
申请号：EP84114195.5
申请日：1984-11-23
发明人： Kamide, Kenji , Okajima, Kunihiko
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3.发明公开Cellulose sulfate salt having anti-coagulating action and process for preparing same 失效纤维素硫酸酯具有抗凝血活性和其制备方法的盐。
公开(公告)号：EP0053473A1
公开(公告)日：1982-06-09
申请号：EP81305569.6
申请日：1981-11-25
CPC分类号： C08B5/14
摘要： A cellulose sulfate salt having a heparinic action is provided, which satisfies requirements of 0.8 ≦ "F" ≦ 2.6, "f 2 " ≧ "f 3 " and "f 2 " ≧ "f 6 " wherein "f 2 ", "f 3 " and "f 6 " stand for probability of substitution of atoms H in the OH groups bonded to the C 2 , C 3 and C 6 positions of the glucopyranose ring unit by sulfuric acid radicals, respectively, and "F" stands for the total substitution degree which is the sum of "f 2 ", "f 3 " and "f s ". The cellulose sulfate salt is prepared by reacting a cellulose having a crystal form I with an S0 3 /amine or S0 3 /amide complex in an amount of 2 to 4 mole equivalents per glucose unit of the cellulose at -10°C to 40°C to form a gelatinous product; adding water to the gelatinous product in an amount 0.1 to 5 times the amount of the starting cellulose used for the reaction; treating the mixture at a high temperature to relatively reduce the values of "«f 6 " and "f 3 " among the values of "f 2 ", "f 3 " and "f 6 "; neutralizing, precipitating and drying the so obtained crude cellulose sulfate; dissolving the crude cellulose sulfate in water again; treating the solution with an adsorbent; and subjecting the treated cellulose sulfate to precipitation, drying, re-dissolution, dialysis, precipitation and then drying.
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4.发明授权
公开(公告)号：EP0147634B1
公开(公告)日：1991-08-07
申请号：EP84114195.5
申请日：1984-11-23
发明人： Kamide, Kenji , Okajima, Kunihiko
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5.发明公开
公开(公告)号：EP0147634A3
公开(公告)日：1986-11-20
申请号：EP84114195
申请日：1984-11-23
发明人： Kamide, Kenji , Okajima, Kunihiko
摘要： Described is a cellulose dope which is an aqueous alkali solution containing substantially at least 3% by weight of cellulose having a degree of polymerization of at least 100, wherein in the 13 C-NMR spectrum of the cellulose, the C 4 -position carbon peak is found at a magnetic field higher by at least 7 ppm than the magnetic field of the C 4 -position carbon peak of solid cellulose attributed to the strong intramolecular hydrogen bond. This dope is prepared by maintaining a mixture comprising 100 weight parts of cellulose, which may have any crystal form, and 10 to 1000 weight parts of a hydrogen bond-cleaving solution at 100°C to 350°C under a pressure of 10 to 250 atmospheres, promptly exposing the mixture to the ambient atmosphere, mixing the resulting cellulose with an aqueous alkali solution maintained at a temperature not higher than 50°C, and then stirring the mixture at a temperature not higher than 10°C to dissolve the cellulose in the aqueous alkali solution. The dope may be used for the manufacture of a shaped article or for coating.
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6.发明授权Cellulose sulfate salt having anti-coagulating action and process for preparing same 失效具有抗凝血作用的纤维素硫酸盐及其制备方法
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