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    • 14. 发明授权
    • Polymerization process for drag reducing substances
    • 减阻剂聚合工艺
    • US4433123A
    • 1984-02-21
    • US262870
    • 1981-05-12
    • Mark P. Mack
    • Mark P. Mack
    • C08F10/00C08F4/64
    • C08F10/00
    • A method is provided for the production of ultrahigh molecular weight drag reducing substances and the like comprising:(a) preparing under an inert atmosphere a catalyst comprising: p1 (1) titanium halide of the general formula TiX.sub.m wherein m=2.5 to 4.0;(2) a co-catalyst of the formula AlR.sub.n X.sub.3-n where R is a hydrocarbon radical, X is a halogen or hydrogen and n is 2 or 3;(3) a phosphorous compound of the formula PR.sub.1 R.sub.2 R.sub.3 or P(OR.sub.1) (OR.sub.2) (OR.sub.3) where R.sub.1, R.sub.2, and R.sub.3 are, independently, aryl, alkyl, aralkyl, or alkaryl, containing from 1 to 12 carbon atoms and placing the catalyst in contact with;(b) alpha-monoolefinic hydrocarbons from C.sub.2 -C.sub.30 under suitable temperature conditions to provide a hydrocarbon soluble ultrahigh molecular weight polymer, then ceasing polymerization at a polymer content level of 20% by weight or less, based on the total reaction mixture.
    • 提供了一种生产超高分子量减阻物质等的方法,包括:(a)在惰性气氛下制备催化剂,该催化剂包含:p1(1)通式TiXm的卤化钛,其中m = 2.5至4.0; (2)式AlRnX3-n的助催化剂,其中R是烃基,X是卤素或氢,n是2或3; (3)通式为PR1R2R3或P(OR1)(OR2)(OR3)的磷化合物,其中R 1,R 2和R 3独立地为含有1至12个碳原子的芳基,烷基,芳烷基或烷芳基, 催化剂接触; (b)在合适的温度条件下从C2-C30得到的α-单烯烃,以提供烃溶性超高分子量聚合物,然后基于总反应混合物停止聚合物含量为20重量%以下的聚合。