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    • 3. 发明授权
    • Seismic exploration
    • 地震勘探
    • US3956730A
    • 1976-05-11
    • US469873
    • 1974-05-14
    • Maurice Barbier
    • Maurice Barbier
    • G01V1/00G01V1/13
    • G01V1/005
    • A method of seismic exploration employing a plurality of emission sources and at least one receiver, arranged in a common plane, in which the sources emit signals into the medium to be explored, which are received after reflection by the receiver, the emission times anda received signals being recorded and correlated to yield required information, and in which the relative emission times of the pulse sources is determined by a predetermined program. Apparatus for carrying out this method is also proposed.
    • 一种采用多个发射源和至少一个接收器的地震勘探方法,其布置在公共平面中,其中源将信号发射到待接收的反射后被接收的介质中,发射时间和接收的 信号被记录和相关以产生所需信息,并且其中脉冲源的相对发射时间由预定程序确定。 还提出了用于执行该方法的装置。
    • 4. 发明授权
    • Method for copolymerizing monomers of different types and polymer blends
contain the copolymer
    • 用于共聚不同类型的单体和聚合物共混物的方法包含共聚物
    • US3949016A
    • 1976-04-06
    • US499537
    • 1974-08-22
    • Elias AgouriPhilippe MornetClaude ParlantJacques Rideau
    • Elias AgouriPhilippe MornetClaude ParlantJacques Rideau
    • C08F210/00C08F295/00C08L23/06
    • C08F295/00C08F210/00Y10S260/32
    • The present invention describes a process of producing block copolymers from monomers of different types by polymerization in two successive steps. The first step consists in polymerizing monomers of a first type by means of coordinated anionic catalysts comprising organo-metallic compounds of a metal of the Group IA, IIA, IIIA, or mixtures thereof of Mendeleev's Periodic Table of Elements, associated with a transition metal compound of Group IV to VIII and the second step comprises polymerizing a second type of monomer in the presence of the polymer formed in the first step and in the presence of free radical catalysts, wherein 0.01 to 100 moles of an adjuvant per mole of transition metal compound is added to the reaction medium of the first step and this adjuvant consists of a compound MY.sub.n in which M is selected from the group consisting of boron and Group IIB metals of Mendeleev's Periodic Classification of the Elements, n is the valency of M, and Y represents a member selected from the group consisting of a monovalent hydrocarbyl group, hydrogen and a halogen atom. The block copolymers thus formed can be used in preparing blends with other polymers.
    • 本发明描述了通过在两个连续步骤中聚合制备不同类型的单体的嵌段共聚物的方法。 第一步是通过配位的阴离子催化剂聚合第一类单体,所述配位阴离子催化剂包含与过渡金属化合物相关的元素周期表IA,IIA,IIIA族金属的有机金属化合物或其混合物 的第IV至VIII族,第二步包括在第一步中形成的聚合物存在下和在自由基催化剂存在下聚合第二类型的单体,其中每摩尔过渡金属化合物为0.01至100摩尔的佐剂 加入到第一步的反应介质中,该助剂由化合物MYn组成,其中M选自Mendeleev氏元素周期分类的硼和IIB族金属,n为M的化合价,Y为 表示选自一价烃基,氢和卤素原子的成员。 如此形成的嵌段共聚物可用于制备与其它聚合物的共混物。