US5034470A
Expired / Lapsed
US
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Process for the preparation of epoxidized synthetic cis-1,4-polyisoprene
Assignee: Goodyear Tire and Rubber Co
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Filing: 1990-09-04
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Granted: 1991-07-23
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Expires: 2010-09-04
Abstract
Abstract The present invention relates to a process for the preparation of epoxidized synthetic cis-1,4-polyisoprene. The process involves reacting the synthetic cis-1,4-polyisoprene in a C 5 -C 7 aliphatic hydrocarbon with tertiary butyl hydroperoxide in the presence of a molybdenum catalyst at a reaction temperature ranging from about 20° C. to about 100° C. The molybdenum catalyst is prepared by reacting together under a N 2 atmosphere molybdenum pentachloride with a carboxylic acid of the formula: CH.sub.3 (CH.sub.2).sub.n COOH wherein n is an integer ranging from 8 to 28. The molar ratio of molybdenum pentachloride to the carboxylic acid ranges from about 1:1 to 1:3.
Inventors
- 👤 Joseph F. Geiser
- 👤 Dane K. Parker
- 👤 Richard G. Bauer
- 👤 Kenneth F. Castner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:27
CPC Classifications
C; C07; C07F; C07F11/00; C07F11/005; C08; C08C; C08C19/00; C08C19/04; C08C19/06
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
101 words
A process for the preparation of epoxidized synthetic polyisoprene comprising reacting synthetic cis- 1,4-polyisoprene in a C 5 --C 7 aliphatic hydrocarbon with tertiary butyl hydroperoxide in the presence of a molybdenum containing catalyst at a reaction temperature ranging from about 20° C. to about 100° C. wherein said catalyst is prepared by reacting under a N 2 atmosphere molybdenum pentachloride with a carboxylic acid of the formula: CH.sub.3 (CH.sub.2).sub.n COOH wherein n is an integer ranging from about 8 to about 28 and the molar ratio of said molybdenum pentachloride to said carboxylic acid ranges from about 1:1 to 1:3.
Claim 2
Dependent Claim
101 words
A process for the preparation of epoxidized synthetic polyisoprene comprising reacting synthetic cis- 1,4-polyisoprene in a C 5 --C 7 aliphatic hydrocarbon with tertiary butyl hydroperoxide in the presence of a molybdenum containing catalyst at a reaction temperature ranging from about 20° C. to about 100° C. wherein said catalyst is prepared by reacting under a N 2 atmosphere molybdenum pentachloride with a carboxylic acid of the formula: CH.sub.3 (CH.sub.2).sub.n COOH wherein n is an integer ranging from about 8 to about 28 and the molar ratio of said molybdenum pentachloride to said carboxylic acid ranges from about 1:1 to 1:3.
Claim 3
Dependent Claim
11 words
The process of claim 1 wherein n is 10 to 16.
Claim 4
Dependent Claim
15 words
The process of claim 1 wherein said C 5 -C 7 aliphatic hydrocarbon is hexane.
Claim 5
Dependent Claim
17 words
The process of claim 1 wherein the tertiary butyl hydroperoxide ranges from about 70% to 100 purity.
Claim 6
Dependent Claim
15 words
The process of claim 4 wherein the tertiary butyl hydroperoxide has a purity of 90%.
Claim 7
Dependent Claim
21 words
The process of claim 1 wherein said molar ratio of molybdenum pentachloride to carboxylic acid ranges from about 1:1.25 to 1:2.
Claim 8
Dependent Claim
27 words
The process of claim 1 wherein the amount of molybdenum containing catalyst ranges from about 0.01 to about 0.25 mole percent of the unsaturation in the polyisoprene.
Claim 9
Dependent Claim
18 words
The process of claim 1 wherein the reaction temperature ranges from about 55° C. to about 70° C.
Claim 10
Dependent Claim
32 words
The process of claim 1 wherein said polyisoprene is dissolved in said C 5 -C 7 aliphatic hydrocarbon in an amount ranging from about 5% by weight to about 18% by weight/vol.
Claim 11
Dependent Claim
32 words
The process of claim 9 wherein said polyisoprene is dissolved in said C 5 -C 7 aliphatic hydrocarbon in an amount ranging from about 7% by weight to about 10% by weight/vol.
References Cited (Backward Citations)
US4157346A
Cited
EP0159619A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-22 | 1995-01-21 | 1995-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-22 | 1999-01-21 | 1999-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-22 | 2003-01-21 | 2003-07-23 | $7700.00 | Window Closed / Lapsed |