High molecular weight copolyamides containing quinazoline dione units
    5.
    发明授权
    High molecular weight copolyamides containing quinazoline dione units 失效
    含有喹唑啉二酮单元的高分子量共聚酰胺

    公开(公告)号:US3991015A

    公开(公告)日:1976-11-09

    申请号:US466842

    申请日:1974-05-03

    IPC分类号: C08G69/32 C08G69/26 C08G69/40

    CPC分类号: C08G69/32

    摘要: High molecular weight aromatic copolyamides which contain a small proportion of structural units having 2,3-(1H,3H)-quinazoline dione rings are disclosed. The presence of quinazolinedione ring units in the copolyamide results in an increased moisture absorption capacity. By using small amounts of quinazoline dione units, the good physical properties of the corresponding quinazoline dione-free polyamide are substantially retained while the moisture absorption is significantly increased. Larger amounts of quinazoline dione units than contemplated (15 mol percent and more) do not improve the moisture absorption further and adversely affect the physical properties. The copolyamides are useful in textile applications in which the improved moisture absorption serves to make clothing prepared from such textiles more comfortable.

    摘要翻译: 公开了含有少量具有2,3-(1H,3H) - 喹唑啉二酮环的结构单元的高分子量芳族共聚酰胺。 共聚酰胺中喹唑啉二酮环单元的存在导致增加的吸湿能力。 通过使用少量的喹唑啉二酮单元,相应的喹唑啉二酮类聚酰胺的良好的物理性质基本保持,同时吸湿显着增加。 比预期的更大量的喹唑啉二酮单元(15摩尔%以上)不会进一步改善吸湿性并且不利地影响物理性能。 共聚酰胺可用于纺织应用中,其中改善的吸湿性用于使由这种纺织品制备的衣物更舒适。

    Process of using a semi-permeable membrane of acrylonitrile copolymers
    9.
    发明授权
    Process of using a semi-permeable membrane of acrylonitrile copolymers 失效
    使用丙烯腈共聚物半透膜的方法

    公开(公告)号:US4252652A

    公开(公告)日:1981-02-24

    申请号:US74822

    申请日:1979-09-12

    CPC分类号: C08F220/44 B01D71/42

    摘要: A disulphimide group-containing acrylonitrile copolymer semi-permeable membrane which comprises:(A) from 99 to 50% by weight of acrylonitrile units;(B) from 1 to 50% by weight of units of an acrylonitrile-copolymerizable ethylenically unsaturated monomer containing one or two disulphimide groups; and(C) from 0 to 30% by weight of units of one or more other acrylonitrile-copolymerizable olefinically unsaturated monomer, the sum of the percentages amounts to 100.The semi-permeable membranes may be used in reverse osmosis and ultrafiltration.

    摘要翻译: 一种含二酰亚胺基的丙烯腈共聚物半透膜,其包含:(A)99至50重量%的丙烯腈单元; (B)1至50重量%的含有一个或两个二硫酰亚胺基团的丙烯腈可共聚的烯键式不饱和单体单元; 和(C)0至30重量%的一种或多种其它丙烯腈可共聚的烯属不饱和单体的单元,百分比总和为100.半透膜可用于反渗透和超滤。