Pullulan aminoalkyl ether
    7.
    发明授权
    Pullulan aminoalkyl ether 失效
    支链淀粉氨基烷基醚

    公开(公告)号:US4167623A

    公开(公告)日:1979-09-11

    申请号:US848033

    申请日:1977-11-03

    IPC分类号: C08B37/00 C07H15/04

    CPC分类号: C08B37/0018

    摘要: 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.

    摘要翻译: 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。

    Method for producing a .gamma.-lactone
    8.
    发明授权
    Method for producing a .gamma.-lactone 失效
    制备{65-内酯的方法

    公开(公告)号:US4083855A

    公开(公告)日:1978-04-11

    申请号:US765780

    申请日:1977-02-04

    CPC分类号: C07D307/33 C07C49/227

    摘要: A method for producing a 3,3-dimethyl-4-(2,2-dihalogenovinyl)-4-hydroxybutyric-1,4-lactone of the formula, ##STR1## wherein X is a halogen atom, which comprises reacting a 1,1,1-trihalogeno-4-methyl-3-pentene-2-ol of the formula, ##STR2## wherein X is a halogen atom, or a 1,1,1-trihalogeno-4-methyl-4-pentene-2-ol of the formula, ##STR3## wherein X is a halogen atom, or the mixture of the both compounds with vinylidene chloride of the formula, ##STR4## IN SULFURIC ACID.

    摘要翻译: 制备下式的3,3-二甲基-4-(2,2-二卤代乙酰基)-4-羟基丁酰-1,4-内酯的方法,其中X是卤素原子,其包括使1, 1,1-三卤代-4-甲基-3-戊烯-2-醇,其中X是卤素原子,或1,1,1-三卤代-4-甲基-4-戊烯-2 - 醇,其中X是卤素原子,或者这两种化合物与下式的偏二氯乙烯的混合物:在硫酸中。

    Process for producing semipermeable membrane
    10.
    发明授权
    Process for producing semipermeable membrane 失效
    半透膜生产工艺

    公开(公告)号:US4511711A

    公开(公告)日:1985-04-16

    申请号:US463243

    申请日:1983-02-02

    摘要: A process for producing a semipermeable membrane having a high flux, excellent in solute rejection and useful for reverse osmosis, ultrafiltration and the like which comprises dipping a semipermeable membrane of acrylonitrile polymer containing 40-100% by mole of acrylonitrile in a solution of an amine and/or an alkali, or casting a solution of said polymer containing an amine and/or an alkali to prepare a semipermeable membrane, and optionally, treating the semipermeable membrane thus obtained with plasma.

    摘要翻译: 一种制备具有高通量,优异的溶质排斥性和可用于反渗透,超滤等的半透膜的方法,其包括将含有40-100摩尔%丙烯腈的丙烯腈聚合物的半透膜浸入胺溶液中 和/或碱,或者浇铸含有胺和/或碱的所述聚合物的溶液以制备半透膜,并且任选地用等离子体处理由此获得的半透膜。