Method for the modification of starch in an aqueous medium
    11.
    发明授权
    Method for the modification of starch in an aqueous medium 失效
    在水性介质中改性淀粉的方法

    公开(公告)号:US4540777A

    公开(公告)日:1985-09-10

    申请号:US591404

    申请日:1984-03-20

    CPC分类号: D21H17/28 C08B31/00

    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。

    Aqueous solution of mixtures of silicon-organic compounds
    13.
    发明授权
    Aqueous solution of mixtures of silicon-organic compounds 失效
    硅 - 有机化合物混合物的水溶液

    公开(公告)号:US4195141A

    公开(公告)日:1980-03-25

    申请号:US814807

    申请日:1977-07-11

    摘要: An aqueous solution of a mixture of silicon-organic compounds comprising:A. A silane of the general formula: ##STR1## wherein a is 1 or 2, b is 0, 1 or 2, and a +b is equal to or less than 3, p is 0 or 1, and R represents an alkylene moiety of 1 to 8 carbon atoms or arylene moiety, R' represents an alkyl moiety, X represents a hydrolizable moiety and Y represents a functional group or the CH.sub.3 or the CH.sub.2 .dbd.CH moiety, andB. A copolymer having the recurrent unit of the general formula: ##STR2## wherein R" represents OH and/or [O].sup.- [NH.sub.4 ].sup.+ and/or [O].sup.- [Me].sup.+ where Me is an alkali or alkaline earth metal and Z can represent a moiety of the formula: ##STR3## wherein R"' represents an alkyl moiety. Also disclosed are new copolymers having the recurrent unit ##STR4## wherein at least one of the Z moieties is a moiety having the formula ##STR5## wherein R"' represents an alkyl moiety. Also disclosed are the use of the aqueous solutions as coating agents for metals, inorganic oxidic and inorganic sulfidic materials. There is also disclosed the use of such aqueous solutions of silicon organic compounds as adhesivizing agents especially for securing inorganic oxidic materials to polymers.

    摘要翻译: 硅 - 有机化合物的混合物的水溶液,其包含:A.具有以下通式的硅烷:其中a为1或2,b为0,1或2,a + b等于或小于 3,p为0或1,R为1〜8个碳原子的亚烷基部分或亚芳基部分,R'为烷基部分,X为可水解部分,Y为官能团,Y为CH 2或CH 2 = CH 部分和B.具有以下通式的复发单元的共聚物:其中R“表示OH和/或[O] - [NH 4] +和/或[O] - [Me] +,其中Me为 碱金属或碱土金属,Z可以表示下式的部分:其中R“表示烷基部分。 还公开了具有复发单元“IMAGE”的新共聚物,其中至少一个Z部分是具有式“IMAGE”的部分,其中R“表示烷基部分。 还公开了水溶液作为金属,无机氧化物和无机硫化物材料的涂层剂的用途。 还公开了这种硅有机化合物的水溶液作为粘合剂的用途,特别是将无机氧化物材料固定在聚合物上。