| 摘要 |
An improved process for preparing linear interpolymers of olefin(s) (eg ethylene) and carbon monoxide (Polyketones) is provided. The process comprises polymerising the olefin(s) with carbon monoxide in the presence of a palladuim catalyst derived from a palladuim source, a bidentate amine, phosphine, arsine or stibine of formula (R<1>)2M -R<2> -M(R<1>)2 where the M atoms are selected from N, P, As or Sb, the R<1> groups are eg C1 to C4 alkyl or phenyl and R<2> is eg -(CH2)-a where a = 2 to 10, and a anion prepared by reacting in a 2:1 molar ratio and substituted salicylic acid and boric acid. The salicylic acid is preferably 4- or 5- substituted with methyl, Cl or Br. Using this particular palladuim catalyst leads to high polymer yields than eg when unsubstituted salicylic acid is employed. |
