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US3627745A
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Termination of diene polymerization
Assignee: Phillips Petroleum Co
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Filing: 1970-06-29
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Granted: 1971-12-14
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Expires: 1990-06-29
Abstract
Abstract A method of terminating the polymerization of monomers in which polymerization there is formed a metal-terminated polymer by introducing into the reaction mixture a lactone.
Inventors
- 👤 Heary L Hsieh
- 👤 Francis X Mueller Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:29
CPC Classifications
C; C08; C08F; C08F297/00; C08F297/02; C08C; C08C19/00; C08C19/30; C08C19/42; C08C19/44
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
32 words
The method of claim 1 in which said lactone is introduced into said reaction mixture in an amount from about 0.02 to about 1 part by weight per 100 parts of monomer.
Claim 2
Dependent Claim
12 words
The method of claim 1 in which said lactone is epsilon -caprolactone.
Claim 3
Dependent Claim
32 words
The method of claim 3 in which said lactone is introduced into said reaction mixture in an amount from about 0.2 to about 0.6 parts by weight per 100 parts of monomer.
References Cited (Backward Citations)
US3193590A
Cited
US3281383A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-13 | 1975-06-14 | 1975-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-13 | 1979-06-14 | 1979-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-13 | 1983-06-14 | 1983-12-14 | $7700.00 | Window Closed / Lapsed |