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    • 101. 发明授权
    • Cyanoethylpullulan
    • 氰基乙基
    • US4322524A
    • 1982-03-30
    • US168269
    • 1980-07-10
    • Yoshiro OndaHiroaki MutoHiroshi Suzuki
    • Yoshiro OndaHiroaki MutoHiroshi Suzuki
    • C08B37/00
    • C08B37/0018
    • The present invention provides a novel compound cyanoethylpullulan which is a cyanoethylation product of pullulan. Pullulan is readily cyanoethylated by the reaction with acrylonitrile in the presence of an alkali catalyst such as sodium hydroxide.The cyanoethylpullulan having a degree of cyanoethylation of at least 50% has various unique properties in the heat resistance, solubility in organic solvents, film-forming property, adhesive bonding to metals and the like in comparison with related cyanoethylated products such as cyanoethylcellulose and cyanoethylated polyvinyl alcohol.
    • 本发明提供了作为支链淀粉的氰乙基化产物的新型化合物氰乙基普兰兰。 在碱性催化剂如氢氧化钠的存在下,通过与丙烯腈的反应,将支链淀粉容易地氰乙基化。 具有至少50%氰基乙基化度的氰乙基普兰兰与相关的氰乙基纤维素和氰乙基化聚乙烯吡咯烷酮相关的氰乙基化产物相比具有各种独特的耐热性,在有机溶剂中的溶解性,成膜性,与金属的粘合性等 醇。
    • 102. 发明授权
    • Pullulan aminoalkyl ether
    • 支链淀粉氨基烷基醚
    • US4167623A
    • 1979-09-11
    • US848033
    • 1977-11-03
    • Fumio FujitaKosuke FukamiMasanori Fujimoto
    • Fumio FujitaKosuke FukamiMasanori Fujimoto
    • C08B37/00C07H15/04
    • C08B37/0018
    • Pullulan aminoalkyl ether is obtained by reacting pullulan with an aminoalkylating agent in a solvent in the presence of an alkali. This ether may be used as a cationic polymer of considerable utility in industries. For instance, when used in a paper coating material, it gives desirable effects on gloss, RI dry pick, and RI wet pick and, furthermore, as compared with pullulan, markedly improves physical properties of the coated paper such as tearing strength, tensile strength and wrinkle recovery; it improves also retention of loading materials such as clay and calcium carbonate.
    • 支链淀粉氨基烷基醚通过在碱存在下在溶剂中将支链淀粉与氨基烷基化试剂反应得到。 该醚可用作工业中相当实用的阳离子聚合物。 例如,当在纸张涂布材料中使用时,其对光泽度,RI干性接枝和RI湿腻子具有期望的效果,此外,与支链淀粉相比,显着改善涂布纸的物理性能如撕裂强度,拉伸强度 和皱纹恢复; 它还改善了载体材料如粘土和碳酸钙的保留。
    • 104. 发明授权
    • Diester crosslinked polyglucan hydrogels and reticulated sponges thereof
    • 二酯交联聚葡聚糖水凝胶及其网状海绵
    • US4002173A
    • 1977-01-11
    • US568030
    • 1975-04-14
    • James H. ManningJohn H. Stark
    • James H. ManningJohn H. Stark
    • A61L15/64A61K31/715A61L15/60A61P7/04B01J20/24C08B33/00C08B33/02C08B37/00C08B37/02F23L3/00
    • C08B37/0021A61L15/425A61L15/60C08B33/02C08B37/0018A61L2400/04
    • Novel hydrogel compositions of diester crosslinked polyglucans and a process for their preparation are provided. Amylose, dextran, and pullulan succinates and glutarates when crosslinked as described were found to not only have use as general fluid sorbants but also to have exceptional hemostatic activity, adherence to a wound, and bioabsorption without causing undue irritation of the tissue or toxic effects. Reticulated hydrogel sponges made of the crosslinked diesters which are particularly useful as general fluid sorbants, and those of amylose succinate and amylose glutarate are most excellent bioabsorbable hemostatic agents. The sponges are made by lyophilizing water-soluble salts of the mono- or half-esters, such as water-soluble salts of amylose succinate or amylose glutarate, under process conditions of the invention in the presence of a reticulating agent which causes a controlled melting of the salt solution as it nears the dry state during the lyophilizing step. The resulting reticulated, porous, open-celled sponge is then crosslinked by heating the sponge under dehydrating conditions to form diester-crosslinks. The sponge is highly porous, is moderately strong, and has the ability to retain up to 40 times its weight of isotonic saline. When neutralized with physiologically acceptable salts, the sponge has exceptional hemostatic activity, adherence to bleeding tissue, and bioabsorption without causing substantial irritation of the tissue or toxic effects.The invention also comprises a process of providing hemostasis at the site of a wound, employing the diester cross-linked polyglucan hydrogels or reticulated sponges thereof.
    • 提供了二酯交联聚葡聚糖的新型水凝胶组合物及其制备方法。 发现当如上所述交联时,直链淀粉,葡聚糖和支链淀粉琥珀酸酯和戊二酸酯不仅可以用作普通流体吸着剂,而且具有特殊的止血活性,对伤口的粘附和生物吸收,而不会对组织造成不适当的刺激或毒性作用。 特别可用作一般液体吸附剂的交联二酯制成的网状水凝胶海绵,以及直链淀粉琥珀酸酯和直链淀粉戊二酸酯的网状水凝胶海绵是最优异的生物可吸收止血剂。 海绵通过在本发明的工艺条件下,在引起受控熔化的网状剂的存在下,将单酯或半酯的水溶性盐如琥珀酸直链淀粉的水溶性盐或直链淀粉戊二酸盐的水溶性盐冻干, 的盐溶液,因为其在冻干步骤期间接近干燥状态。 然后通过在脱水条件下加热海绵将形成的网状多孔的开孔海绵交联,形成二酯交联。 海绵是高度多孔的,中等强度,并且具有保留高达40倍重量的等渗盐水的能力。 当用生理上可接受的盐中和时,海绵具有特殊的止血活性,对出血组织的粘附和生物吸收,而不会对组织产生显着的刺激或毒性作用。