Process for preparing polketones with boron containing anion from substituted salicylic acid and boric acid
US5187258A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 22, 1990 |
| Grant date | Feb 16, 1993 |
| Priority date | — |
| Expiry date | Mar 22, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G67/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An improved process for preparing linear interpolymers of olefin(s) (e.g. ethylene) and carbon monoxide (Polyketones) is provided. The process comprises polymerizing the olefin(s) with carbon monoxide in the presence of a palladium catalyst derived from a palladium source, a bidentate amine, phosphine, arsine or stibine of formula (R.sup.1).sub.2 M--R.sup.2 --M(R.sup.1).sub.2 where the M atoms are selected from N, P, As or Sb, the R.sup.1 groups are e.g. C.sub.1 to C.sub.4 alkyl or phenyl and R.sup.2 is e.g. (CH.sub.2).sub.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 palladium catalyst leads to high polymer yields than e.g. when unsubstituted salicylic acid is employed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.