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    • 4. 发明授权
    • Process for the preparation of cyclic esters
    • 环酯的制备方法
    • US6107496A
    • 2000-08-22
    • US261132
    • 1999-03-03
    • Clemens OsterholtJosef MetzGuenther Koehler
    • Clemens OsterholtJosef MetzGuenther Koehler
    • C07B61/00C07D321/00C07D323/04C07D407/00
    • C07D321/00Y02P20/582
    • A process for the preparation of cyclic esters of the general formula: ##STR1## in which m is an integer from 6-14 and n is an integer from 2-6, which comprises heating a dicarboxylic acid bis(glycol) ester of the general formula:HO--(CH.sub.2).sub.n --O--CO--(CH.sub.2).sub.m --CO--O--(CH.sub.2).sub.n --OH, formula IIin which m and n are as defined above,(b) optionally, up to 100% by weight, based on the weight of ester II, of esters of the general formula:H[O--(CH.sub.2).sub.n --O--CO--(CH.sub.2).sub.m --CO--].sub.x --O--(CH.sub.2).sub.n --OH, formula IIIH[O--(CH.sub.2).sub.n --O--CO--(CH.sub.2).sub.m CO--]X--OH and/orformula IVHO--CO--(CH.sub.2).sub.m --CO--[--O--(CH.sub.2).sub.n O--CO--(CH.sub.2).sub.m --CO--].sub.x --OH, formula Vin which m and n are as defined previously and x is an integer >1, and(c) a glycol of the general formula:HO--(CH.sub.2).sub.n --OH, formula VIin which n has the same numerical value as in formula I-V,(d) an inert high-boiling reaction medium, and(e) a catalyst.
    • 一种制备通式的环酯的方法:其中m是6-14的整数,n是2-6的整数,其包括加热通式为HO的二羧酸双(二醇)酯 - (CH 2)n O-CO-(CH 2)m -CO-O-(CH 2)n -OH,其中m和n如上所定义的式IIin,(b)任选地,至多100重量% 酯II的通式为H [O-(CH 2)n O-CO-(CH 2)m -CO-] x O - (CH 2)n -OH的酯,式IIIH [O-(CH 2)n O- CO-(CH 2)m CO-] X-OH和/或式IVHO-CO-(CH 2)m -CO- [-O-(CH 2)n O-CO-(CH 2)m -CO-] x-OH,式Vin 其中m和n如前定义,x是> 1的整数,和(c)通式为HO-(CH 2)n -OH的二醇,其中n具有与式IV相同的数值, (d)惰性高沸点反应介质,和(e)催化剂。
    • 10. 发明授权
    • Counterrecoil blocking device
    • 反卷取阻挡装置
    • US4955281A
    • 1990-09-11
    • US390393
    • 1989-08-07
    • Josef MetzHans Hulsewis
    • Josef MetzHans Hulsewis
    • F41A25/02
    • F41A25/02
    • A gun includes a barrel arranged to execute a recoil and a counterrecoil after a shot is fired; a trunnion about which the barrel is pivotal in a vertical plane to assume an index position and firing positions situated at an angle to the index position; a case ejector for ejecting a case from the barrel during counterrecoil; and a counterrecoil blocking device for interrupting the counterrecoil as long as the barrel is in a firing position other than the index position and for allowing the counterrecoil to resume when the barrel assumes the index position, whereby case ejection by the case ejector is effected in the index position.
    • 一把枪包括一个枪管,用于在射击后被执行反冲和反卷取; 耳轴,所述筒在所述耳轴处于垂直平面中枢转以呈现与所述指示位置成一定角度的折索位置和触发位置; 用于在反卷盘期间从壳体中弹出壳体的壳体喷射器; 以及用于中断反卷盘的反卷取阻挡装置,只要桶处于除索引位置以外的点火位置,并且当筒体呈现折痕位置时允许反卷盘恢复,由此通过壳体喷射器进行壳体喷射 指数位置