Leather tanning with oligourethanes
    6.
    发明授权
    Leather tanning with oligourethanes 失效
    皮革鞣制与低聚氨酯

    公开(公告)号:US4106897A

    公开(公告)日:1978-08-15

    申请号:US718489

    申请日:1976-08-30

    IPC分类号: C14C3/18

    CPC分类号: C14C3/18

    摘要: This invention is concerned with a method of tanning or retanning leather or pelts by treating them with an aqueous liquor containing water-soluble oligourethanes having ionic groups. The oligourethanes have a molecular weight of from 300 to 20,000 and they may be methylolated. The oligourethanes may be water-soluble owing to their ionic groups or they may contain hydrophilic segments to aid in their solubility in the aqueous liquor. The liquor may also contain up to an equal amount of formaldehyde or compounds which split off formaldehyde.

    摘要翻译: 本发明涉及通过用含有具有离子基团的水溶性低聚氨酯的含水液体处理皮革或毛皮来鞣制或复鞣的方法。 低聚氨酯的分子量为300至20,000,它们可以是羟甲基化的。 寡聚氨酯由于其离子基团而可能是水溶性的,或者它们可以含有亲水链段以帮助其在含水液体中的溶解度。 该液体还可含有相等量的甲醛或分解甲醛的化合物。