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US3969386A Expired / Lapsed US ⏱️ 0.0 years remaining

Organo-metallic compounds

Assignee: Imperial Chemical Industries Ltd
•
Filing: 1975-02-12
•
Granted: 1976-07-13
•
Expires: 1995-02-12
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Abstract

Abstract Organometallic compounds of the general formula LrM(CH2SiR1R2R3)m (1) where M is a transition metal of Groups IIIA to VIA of the Periodic Table of Elements, m is an integer from 1 to the prevailing valency of the metal M, Lr represents the sum of any other incidental ligands attached to the metal M, r being 0 or an integer, and R1, R2 and R3 represent substituted or unsubstituted hydrocarbyl groups or hydrogen atoms, at least one of said groups having the general formula WHERE N IS AN INTEGER FROM 1 TO 5 AND Y is a group capable of donating electrons to the metal M are useful as catalysts for olefin polymerization. The compounds may be used as catalysts alone or when supported upon a matrix for example of alumina. Particularly useful compounds are those in which the transition metal M has a valency lower than the maximum valency for that metal.

Inventors

  • 👤 Denis George Harold Ballard
  • 👤 Adrian Walter Parkins
  • 👤 Peter Anthony Robinson
  • 👤 Samuel Dimewere Ibekwe
  • 👤 Michael Franz Lappert
  • 👤 Ronald Pearce

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-31 04:14
CPC Classifications
C; C07; C07F; C07F11/00; C07F5/00; C07F7/00; C07F7/02; C07F7/08; C07F7/0803; C07F7/0896; C07F7/28; C07F9/00; C08; C08F; C08F10/00; C08F110/00; C08F110/02; C08F110/04; C08F110/06

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 80 words
An organometallic compound of the formula M(CH.sub.2 SiR.sup.1 R.sup.2 R.sup.3).sub.m where M is selected from transition metals of Groups IIIA to VIA of the Periodic Table of Elements, m is the prevailing valency of the metal M, said prevailing valency being 2, 3 or 4, and R 1 , R 2 and R 3 are selected from hydrogen, alkyl, alkenyl, benzyl and alkoxyphenyl, at least one of R 1 , R 2 and R 3 being alkenyl, benzyl or alkoxyphenyl.
Claim 2
Dependent Claim 80 words
An organometallic compound of the formula M(CH.sub.2 SiR.sup.1 R.sup.2 R.sup.3).sub.m where M is selected from transition metals of Groups IIIA to VIA of the Periodic Table of Elements, m is the prevailing valency of the metal M, said prevailing valency being 2, 3 or 4, and R 1 , R 2 and R 3 are selected from hydrogen, alkyl, alkenyl, benzyl and alkoxyphenyl, at least one of R 1 , R 2 and R 3 being alkenyl, benzyl or alkoxyphenyl.
Claim 3
Dependent Claim 44 words
A compound as claimed in claim 1 in which at least one of said groups R 1 R 2 and R 3 is selected from allyl, benzyl and o-methoxy-phenyl groups and any remaining R 1 , R 2 and R 3 groups are methyl.
Claim 4
Dependent Claim 16 words
A compound as claimed in claim 1 wherein the alkenyl contains up to 4 carbon atoms.
Claim 5
Dependent Claim 19 words
Compounds as claimed in claim 1 in which said transition metal M is selected from titanium, vanadium and chromium.

References Cited (Backward Citations)

US3813423A Cited
US3763197A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1979-07-13 1980-01-12 1980-07-13 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1983-07-13 1984-01-12 1984-07-13 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1987-07-13 1988-01-12 1988-07-13 $7700.00 Window Closed / Lapsed

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