Water-based hydraulic fluids
    1.
    发明授权
    Water-based hydraulic fluids 失效
    水性液压油

    公开(公告)号:US4469611A

    公开(公告)日:1984-09-04

    申请号:US438546

    申请日:1982-11-01

    IPC分类号: C10M173/02 C10M3/04 C10M3/12

    摘要: Substantially oil-free aqueous industrial fluids possess superior lubricating and wear preventing characteristics and are useful as hydraulic fluids and metalworking compositions. Fluids of the invention comprise (1) an aqueous liquid and (2) a water-soluble synthetic addition copolymer of (a) an ethylenically unsaturated polyalkyleneoxy containing monomer, (b) an ethylenically unsaturated water-soluble monomer and, optionally, (c) an ethylenically unsaturated water-insoluble monomer.The industrial fluids exhibit good Newtonian behavior and mechanical stability at higher shear.

    摘要翻译: 基本上无油的含水工业液体具有优异的润滑和防磨损特性,可用作液压油和金属加工组合物。 本发明的流体包括(1)水性液体和(2)(a)含烯键式不饱和聚亚烷基氧基单体的水溶性合成加成共聚物,(b)烯键式不饱和水溶性单体和任选地(c) 烯属不饱和的水不溶性单体。 工业液体在较高剪切力下表现出良好的牛顿行为和机械稳定性。

    Pharmaceutical capsules from improved thermogelling methyl cellulose
ethers
    5.
    发明授权
    Pharmaceutical capsules from improved thermogelling methyl cellulose ethers 失效
    改进的THERMOGELLING甲基纤维素酯的药物胶囊

    公开(公告)号:US4001211A

    公开(公告)日:1977-01-04

    申请号:US618549

    申请日:1975-10-01

    申请人: Nitis Sarkar

    发明人: Nitis Sarkar

    CPC分类号: A61K9/4816 Y10S264/37

    摘要: Improved thermogelling methyl cellulose ether compositions for use in preparing pharmaceutical capsules by the pin dip coating process are prepared by blending the properties of water soluble methyl and C.sub.2 -C.sub.3 hydroxyalkyl cellulose ethers to achieve an essentially Newtonian dip coating solution and a rapid high thermal gel yield strength. These properties require a cellulose ether with a relatively narrow molecular weight distribution. Blends of low viscosity methyl cellulose and hydroxypropylmethyl cellulose provide particularly suitable dip solution properties, gel yield strength, and capsule dissolution rates.