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公开(公告)号:US4540777A
公开(公告)日:1985-09-10
申请号:US591404
申请日:1984-03-20
IPC分类号: C08L101/00 , C08B31/00 , C08B31/12 , C08L3/04 , C08L23/00 , D06M13/02 , D06M13/51 , D06M13/513 , D06M15/11 , D06M101/00 , D06M101/02 , D06M101/06 , D06M101/08 , D21H17/28 , C08L3/00
摘要: The present invention is in the modification of starch by silanes and is performed by bringing the starch into intimate contact with the hydrolyzates of the silanes in the presence of alkali aluminates or alkali hydroxides. Preferably this is done in the aqueous solution of the silane hydrolyzate, in which case the additives can be used either in aqueous solution or in solid form. The aluminate or alkali hydroxide is present at least in such an amount that 0.4 mol of aluminate will be present for each mole of silane. The modification is possible not only with alkyl alkoxysilanes, but also with organofunctional alkoxysilanes. The starch modified with the silanes has better practical properties than corresponding unmodified starch and can be used, for example, for the hydrophobation and oleophobation of cellulosic material.
摘要翻译: 本发明是通过硅烷改性淀粉,并且通过在碱金属铝酸盐或碱金属氢氧化物的存在下使淀粉与硅烷的水解产物紧密接触来进行。 优选地,这在硅烷水解物的水溶液中进行,在这种情况下,添加剂可以以水溶液或固体形式使用。 铝酸盐或碱金属氢氧化物至少以每摩尔硅烷0.4摩尔铝酸盐的量存在。 不仅可以使用烷基烷氧基硅烷,而且还可以与有机官能团的烷氧基硅烷进行改性。 用硅烷改性的淀粉具有比相应的未改性淀粉更好的实用性能,可用于例如纤维素材料的疏水化和疏水作用。
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公开(公告)号:US4490526A
公开(公告)日:1984-12-25
申请号:US606709
申请日:1984-05-03
CPC分类号: C08B31/00
摘要: A method for the modification of starch by silanes wherein the starch and silane are contacted in an organic solvent in the presence of a metallic acid ester of a metal of groups IVB or VB of the Periodic Table of the elements. The resulting suspension is stirred. The subsequently separated starch exhibits better working characteristics than the corresponding unmodified starch.
摘要翻译: 通过硅烷改性淀粉的方法,其中淀粉和硅烷在元素周期表的IVB或VB族金属的金属酸酯存在下在有机溶剂中接触。 搅拌所得悬浮液。 随后分离的淀粉表现出比相应的未改性淀粉更好的加工特性。
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公开(公告)号:US4649220A
公开(公告)日:1987-03-10
申请号:US759920
申请日:1985-07-26
IPC分类号: C07C41/16 , C07D301/27 , C07B43/04 , C07C85/04
CPC分类号: C07C209/12 , C07D213/74 , C07D303/36
摘要: Disclosed is a process for the performance of organic reactions in the liquid phase wherein silicone oils are used as the reaction medium. These silicone oils have no functional groups, are liquid at room temperature and have viscosities between 40 and 20,000 cs. at 25.degree. C. The obtained reaction products are very pure and generally do not require additional purifying operations.
摘要翻译: 公开了一种在液相中进行有机反应的方法,其中使用硅油作为反应介质。 这些硅油没有官能团,在室温下为液体,粘度为40至20,000cs。 所得反应产物非常纯,通常不需要额外的纯化操作。
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