Patent US3691241A successfully refreshed from Google Patents.
US3691241A
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Preparation of polymers and telomers using complexes of organomagnesiums with certain hydrides as catalysts
Assignee: Lithium Corp of America Inc
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Filing: 1970-08-24
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Granted: 1972-09-12
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Expires: 1990-08-24
Abstract
Abstract Preparation of polymers of conjugated dienes, such as those of 1,3-butadiene; and of telomers, such as those of benzene or toluene with 1,3-butadiene; utilizing, as a catalyst, complexes of organomagnesiums with (i) alkali metal hydrides or (ii) tetraalkylammonium hydrides, as, for example, complexes of disec-butylmagnesiums with potassium hydride or tetramethylammonium chloride.
Inventors
- 👤 Conrad W Kamienski
- 👤 Joseph H Merkley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:50
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/72; C08; C08F; C08F36/00; C08F36/02; C08F36/04; C07C2531/00; C07C2531/02; C07C2531/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
53 words
The method of claim 1, in which said complex corresponds to the formula MnMgR1R2Hn where M is an alkali metal selected from the group of sodium, potassium, lithium and cesium, R1 and R2 are the same or different C4-C15 alkyl, cycloalkyl, carbocyclic aryl and carbocyclic aralkyl, and n is 1, 2 and 3.
Claim 2
Dependent Claim
23 words
The method of claim 2, in which M is potassium, R1 and R2 are each C4-C5 alkyl, and n is 1 or 2.
Claim 3
Dependent Claim
13 words
The method of claim 3, in which R1 and R2 are each s-butyl.
Claim 4
Dependent Claim
14 words
The method of claim 4, in which the complex corresponds to the formula KMg(s-Bu)2H.
Claim 5
Dependent Claim
14 words
The method of claim 1, in which the complex corresponds to the formula NaMg(s-Bu)2H.s-Bu2Mg.
Claim 6
Dependent Claim
38 words
The method of claim 1, in which said catalyst is a complex corresponding to the formula MnMgR1R2Hn where M is tetraalkylammonium, R1 and R2 are the same or different C4-C5 alkyl, and n is 1, 2 or 3.
Claim 7
Dependent Claim
33 words
The method of claim 1, in which the telogen is toluene and the taxogen is 1,3-butadiene. 9 The method of claim 4, in which the telogen is toluene and the taxogen is 1,3-butadiene.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |