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US 4,906,754 AGranted
Nickel catalysts for copolymerization of ethylene
AssigneeE. I. Du Pont de Nemours and Company
InventorUlrich Klabunde
Life of this patent
Estimating the term…
Abstract
Preparation of ethylene copolymers from ethylene and polar and/or non-polar comonomers in the presence of selected nickel-containing catalysts.
Claims8
The dinickel compound of the formula ##STR37## wherein:
- R.sup.3 and each R.sup.4, independently, is H or C.sub.1-20 hydrocarbyl;
- X.sup.1 is O or S;
- E.sup.1 is P, As or Sb;
- and
- each of R.sup.5 and R.sup.6, independently, is H, C.sub.1-20 hydrocarbyl or a functional group selected from --CO.sub.2 R.sup.2, --CO.sub.2 M, --C(O)N(R.sup.1).sub.2, --C(O)R.sup.2, --SO.sub.2 R.sup.2, --CN, [--NHR.sup.2,][--N(R.sup.2).sub.2,]--Si(OR.sup.1).sub.3-x (R.sup.1).sub.x, --OSi(OR.sup.1).sub.3-x R.sup.1).sub.x, --SO.sub.3 M, wherein M is alkali or alkaline earth metal, ammonium, quaternary ammonium, phosphonium or arsonium, [y is 0, 1 or 2,]each R.sup.1, independently, is H or C.sub.1-20 hydrocarbyl, each R.sup.2, independently, is C.sub.1-20 hydrocarbyl and x is 0 or an integer of 1 to 3 or R.sup.5 and R.sup.6 , taken together, is a substituted or unsubstituted C.sub.5-8 alicyclic, C.sub.5-8 heterocyclic or C.sub.6-14 aromatic ring, the heteroatom of the heterocyclic ring being selected from O, N and S.
2 more elements
The dinickel compound of the formula ##STR41## wherein:
- R.sup.3 is H, methyl or phenyl and each R.sup.4 is H, methyl or phenyl,
- X.sup.1 is O,
- E.sup.1 is P,
- each of R.sup.5 and R.sup.6 is H, methyl or phenyl
1 more element
Process for the preparation of the nickel compound of claim 3, the process comprising contacting and reacting:
- (1) the mixture comprising:
- (i) one or more zero-valent olefin-nickel compounds or .pi.-allyl nickel compounds, or a nickel(I) or nickel(II) compound capable of forming said compounds in the presence of a reducing agent;
- and
- (ii) the phosphorane of the formula
- (R.sup.4).sub.3 P.dbd.C(R.sup.5)C(O)R.sup.6
- wherein:
- R.sup.4, R.sup.5 and R.sup.6 are defined as in claim 7, with the proviso that at least one R.sup.4 is aryl or substituted aryl;
- and
- (2) ligand L.sup.1, wherein L.sup.1 is defined as in claim 3,
- at a molar ratio of nickel compound to phosphorane of about 1:1 to about 1:10, and at a molar ratio of L.sup.1 to nickel compound of at least 1:1, in a solvent, at a temperature within the range of about 0.degree. C. to about 150.degree. C, for about 1 minute to about 72 hours.
7 more elements
The nickel compound of the formula ##STR42## wherein:
- R.sup.3 is H, methyl or phenyl,
- R.sup.4 is H, methyl or phenyl,
- R.sup.5 is H, methyl, phenyl or -SQ.sub.3 Na,
- R.sup.6 is H, methyl or phenyl,
- X.sup.1 is 0,
- E.sup.1 is P,
- L.sup.1 is pyridine or -picoline or R.sup.3 and L.sup.1 taken together is ##STR43## wherein:
- R" is H, hydrocarbyl or oxyhydrocarbyl or N(R.sup.2).sub.2 where each R.sup.2 independently is C.sub.1-20 hydrocarbyl.
5 more elements
Dependencies are inferred from the claim text.