US3887643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diene-lactam block copolymers
Assignee: Phillips Petroleum Co
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Filing: 1973-04-27
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Granted: 1975-06-03
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Expires: 1993-04-27
Abstract
Abstract Diene-lactam block polymers are produced from a metal salt of a lactam, a halogen-substituted isocyanate, a lithium-containing polymer and a lactam.
Inventors
- 👤 Charles M Selman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:50
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/30; C08C19/42; C08C19/44; C07; C07D; C07D201/00; C07D201/14; C07F; C07F1/00; C07F1/005; C08G; C08G69/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
33 words
A METHOD OF PRODUCING A DIENE-LACTAM COPOLYMER WHICH COMPRISES: A. REACTING A METAL SALT OF A LACTAM WITH A HALOGENSUBSTITUTED ISOCYANATE TO PRODUCE A FIRST REACTION PRODUCT, SAID METAL SALT HAVING THE FORMULA
Claim 2
Independent Claim
33 words
A METHOD OF PRODUCING A DIENE-LACTAM COPOLYMER WHICH COMPRISES: A. REACTING A METAL SALT OF A LACTAM WITH A HALOGENSUBSTITUTED ISOCYANATE TO PRODUCE A FIRST REACTION PRODUCT, SAID METAL SALT HAVING THE FORMULA
Claim 3
Independent Claim
33 words
A method of producing a diene-lactam copolymer which comprises: a. reacting a metal salt of a lactam with a halogen-substituted isocyanate to produce a first reaction product, said metal salt having the formula
Claim 4
Independent Claim
33 words
A method of producing a diene-lactam copolymer which comprises: a. reacting a metal salt of a lactam with a halogen-substituted isocyanate to produce a first reaction product, said metal salt having the formula
Claim 5
Dependent Claim
38 words
The method of claim 1 in which the quantity of said lithium-containing polymer reacted with said first reaction product is sufficient to provide an amount of lithium equivalents equal to the halogen equivalents in said first reaction product.
Claim 6
Dependent Claim
18 words
The method of claim 1 in which said lithium-containing polymer is a lithium-containing copolymer of styrene and 1,3-butadiene.
Claim 7
Dependent Claim
64 words
The method of claim 1 in which said metal salt of a lactam is an alkali metal salt and said metal salt of said lactam is reacted with said halogen-substituted isocyanate in equimolar quantities in the presence of an inert hydrocarbon at a temperature within the range of from about 20* to about 200*C for a period of about 1 to about 60 minutes.
Claim 8
Dependent Claim
46 words
The method of claim 1 in which said metal salt of a lactam is the sodium salt of 2-oxohexamethyleneimine, said halogen-substituted isocyanate is 4-chlorophenylisocyanate and said lithium-containing polymer is the reaction product of the copolymerization of styrene and 1,3-butadiene in the presence of a butyllithium initiator.
Claim 9
Dependent Claim
12 words
A diene-lactam copolymer produced in accordance with the method of claim 1.
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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |