Chrome steel alloy
    1.
    发明授权
    Chrome steel alloy 失效
    铬钢合金

    公开(公告)号:US06770243B2

    公开(公告)日:2004-08-03

    申请号:US10181299

    申请日:2002-07-17

    IPC分类号: C22C3822

    摘要: A chromium steel alloy having 0.4 to 0.75% of carbon, 0.4 to 1.6% of manganese, 12 to 19% of chromium, up to 0.2% of nickel, up to 0.7% of silicon, 0.5 to 1.5% of molybdenum, up to 1.5% of tungsten, 0.05 to 0.3% of vanadium and (% Ti/% Nb), 0.02 to 0.15% of sulfur, up to 0.1% of nitrogen and up to 0.008% of boron, remainder iron including smelting-related impurities. This steel alloy is distinguished by good processability, resistance to corrosion, resistance to abrasion, a high resistance to heat up to 300° C. and above, and a high rigidity.

    摘要翻译: 具有0.4〜0.75%的碳,0.4〜1.6%的锰,12〜19%的铬,至多0.2%的镍,至多0.7%的硅,0.5〜1.5%的钼,至多1.5的铬钢合金 的钨,0.05〜0.3%的钒和(%Ti /%Nb),0.02〜0.15%的硫,至多0.1%的氮和至多0.008%的硼,余量为包括冶炼相关杂质的铁。 该钢合金的加工性,耐腐蚀性,耐磨性,耐高达300℃以上的高耐热性和高刚性的特点。

    Copolymers containing perfluoroalkyl groups
    4.
    发明授权
    Copolymers containing perfluoroalkyl groups 失效
    含全氟烷基的共聚物

    公开(公告)号:US4100340A

    公开(公告)日:1978-07-11

    申请号:US773537

    申请日:1977-03-02

    摘要: Copolymers of(A) perfluoroalkylethyl acrylate C.sub.n F.sub.2n+1 CH.sub.2 CH.sub.2 OCOCH.dbd.CH.sub.2(b) higher alkyl acrylate C.sub.m H.sub.2m+1 OCOCH.dbd.CH.sub.2(c) vinylidene chloride CH.sub.2 .dbd.CCl.sub.2(D) acroylbutylurethane CH.sub.2 .dbd.CH--CONHCOOC.sub.4 H.sub.9 at the weight ratio of 1(A) : 0.22-0.39(B) : 0.45-0.85(C) : 0.01-0.15(D) n being 6, 8, 10, 12 or 14 and m being a number from 10 to 16.They are prepared by conventional methods for preparing copolymers and are used as oil - and water repellents for porous materials, especially textile materials.

    摘要翻译: (A)丙烯酸全氟烷基乙酯的共聚物CnF2n + 1CH2CH2OCOCH = CH2(B)丙烯酸高级烷基酯CmH2m + 1OCOCH = CH2(C)偏二氯乙烯CH2 = CCl2(D)丙烯酰基丁基氨基甲酸酯CH2 = CH-CONHCOOC4H9,重量比为1(A) 0.22-0.39(B):0.45-0.85(℃):0.01-0.15(D)n为6,8,10,12或14,m为10至16的数。