Patent US3673166A successfully refreshed from Google Patents.
US3673166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1,2-dialkoxybenzenes as ramdomizer for copolymerizations
Assignee: Phillips Petroleum Co
•
Filing: 1970-12-28
•
Granted: 1972-06-27
•
Expires: 1990-12-28
Abstract
Abstract A method for copolymerizing monomeric materials using organolithium compounds as initiators in which 1,2dialkoxybenzene is introduced into the reaction in a quantity sufficient to produce random copolymers.
Inventors
- 👤 William J Trepka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:15
CPC Classifications
C; C08; C08F; C08F236/00; C08F236/02; C08F236/04; C08F236/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
20 words
The process as defined in claim 1 in which said 1,2-dialkoxybenzene is introduced into said contact in its unreacted form.
Claim 2
Dependent Claim
27 words
The process as defined in claim 1 in whicH said 1,2-dialkoxybenzene is introduced into said contact as the reaction product of said 1,2-dialkoxybenzene and said organolithium compound.
Claim 3
Dependent Claim
36 words
The process as defined in claim 1 in which said 1,2-dialkoxybenzene is introduced into said contact in an amount from about 0.05 to about 1.5 parts by weight per 100 parts by weight of said monomers.
Claim 4
Dependent Claim
34 words
The process as defined in claim 3 in which said reaction product is produced by reacting from about 0.75 to about 2 moles of said organolithium compound with about 1 mole of said 1,2-dialkoxybenzene.
Claim 5
Dependent Claim
44 words
The process as defined in claim 1 in which butadiene and styrene are polymerized in contact with butyllithium and 1,2-dimethoxybenzene, said 1,2-dimethoxybenzene being present in an amount from about 0.069 to about 1.38 parts by weight per 100 parts by weight of said monomers.
Claim 6
Dependent Claim
44 words
The process as defined in claim 2 in which butadiene and styrene are polymerized in contact with butyllithium and 1,2-diethoxybenzene, said 1,2-diethoxybenzene being present in an amount from about 0.03 to about 0.66 parts by weight per 100 parts by weight of said monomers.
Claim 7
Dependent Claim
45 words
The process as defined in claim 3 in which butadiene and styrene are polymerized in contact with butyllithium and 1,2-dimethoxybenzene, said 1,2-dimethoxybenzene being introduced into said reaction as the reaction product of from about 0.75 to about 2 moles of butyllithium per mole of 1,2-dimethoxybenzene.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |