16.
    发明专利
    未知

    公开(公告)号:DE3867389D1

    公开(公告)日:1992-02-13

    申请号:DE3867389

    申请日:1988-08-26

    Applicant: BASF AG

    Abstract: Prodn. of bifunctional anionic polymerisation initiators (I) is carried out by dimerising an alkenyl-aromatic cpd. of formula (II: Ar-CH=C(R1)(R2) (II); Ar = an aromatic hydrocarbyl gp., opt. contg. N and opt. substd. by alkyl gps. or other gps. inert towards alkali-organic cpds.; R1 = linear or branched alkyl, cycloalkyl, alkenyl or aralkyl, in which at least the C atom adjacent to the double bond is satd. and aliphatic; R2 = H or as R1; or R1 + R2 = a cycloaliphatic ring; with alkali metals (III) under inert gas atmos. in the presence of ether(s) (IV) and/or tert. amine(s) (V) and opt. inert aliphatic, alicyclic or aromatic solvent (VI) at -20 to +70 deg. C.

    18.
    发明专利
    未知

    公开(公告)号:DE3711920A1

    公开(公告)日:1988-10-27

    申请号:DE3711920

    申请日:1987-04-08

    Applicant: BASF AG

    Abstract: Oligomeric polyfunctional initiators for anionic polymerization of dienes and/or alkenylaromatics are prepared by a process in which a mixture of dialkenylaromatics and alkenylaromatics in a molar ratio of from 1:4 to 1:100, in an inert solvent, is run, at from 25 DEG to 100 DEG C., continuously or in small portions, with thorough mixing, into an initially taken mixture which contains from 1.2 to 3.0 molar equivalents, based on the dialkenylaromatics, of one or more organolithium compounds and an inert solvent, and is polymerized completely. The resulting oligomeric initiators are used for the preparation of unfunctionalized or functionalized polymers or block copolymers from dienes and/or alkenylaromatics, and the functionalized polymers thus prepared are used as prepolymers for other resins.

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