US3954680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized electroconductive polymers
Assignee: ChampionX LLC
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Filing: 1974-05-06
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Granted: 1976-05-04
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Expires: 1994-05-06
Abstract
Abstract A method of promoting alkaline viscosity stability in polymers formed from a secondary amine, an epihalohydrin and an amount of a crosslinking agent such as a primary amine or ammonia which would cause gelation, comprising reacting said polymer with a tertiary amine; a preferred polymer is formed of epichlorohydrin, dimethylamine and ammonia stabilized with trimethylamine.
Inventors
- 👤 Roger H. Jansma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:40
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/02; C08G73/0206; C08G73/0213; C08G73/022
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
57 words
A polymer of a secondary amine and a monomer containing at least one vicinal expoxide function and at least one alkyl halide function with an overdose of crosslinking agent, and stabilized with a tertiary amine reactive with said alkyl halide function, said cross-linking agent being selected from the group consisting of primary amines, ammonia and mixtures thereof.
Claim 2
Dependent Claim
57 words
A polymer of a secondary amine and a monomer containing at least one vicinal expoxide function and at least one alkyl halide function with an overdose of crosslinking agent, and stabilized with a tertiary amine reactive with said alkyl halide function, said cross-linking agent being selected from the group consisting of primary amines, ammonia and mixtures thereof.
Claim 3
Dependent Claim
12 words
A polymer as in claim 1 wherein said monomer is an epihalohydrin.
Claim 4
Dependent Claim
27 words
A polymer as in claim 1 wherein the secondary amine is dimethylamine, the monomer is epichlorohydrin, the crosslinking agent is ammonia, and the tertiary amine is trimethylamine.
Claim 5
Independent Claim
67 words
A method of promoting alkaline viscosity stability in a polymer of a secondary amine and a monomer containing at least one vicinal epoxide function and at least one alkyl halide function and an overdose of crosslinking agent, comprising reacting said polymer with a tertiary amine reactive with said alkyl halide function, said crosslinking agent being selected from the group consisting of primary amines, ammonia and mixtures thereof.
Claim 6
Independent Claim
67 words
A method of promoting alkaline viscosity stability in a polymer of a secondary amine and a monomer containing at least one vicinal epoxide function and at least one alkyl halide function and an overdose of crosslinking agent, comprising reacting said polymer with a tertiary amine reactive with said alkyl halide function, said crosslinking agent being selected from the group consisting of primary amines, ammonia and mixtures thereof.
Claim 7
Dependent Claim
17 words
A method as in claim 3 wherein the tertiary amine is added about simultaneously with a base.
Claim 8
Dependent Claim
38 words
A method as in claim 4 wherein the tertiary amine is added after the base has caused a viscosity build up in said polymer but before the viscosity build up has proceeded too far to avoid gel formation.
Claim 9
Dependent Claim
12 words
A method as in claim 3 wherein said monomer is an epihalohydrin.
Claim 10
Dependent Claim
27 words
A method as in claim 7 wherein said secondary amine is dimethylamine, said monomer is epichlorohydrin, said crosslinking agent is ammonia and said tertiary amine is trimethylamine.
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) | 1979-05-04 | 1979-11-03 | 1980-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-04 | 1983-11-03 | 1984-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-04 | 1987-11-03 | 1988-05-04 | $7700.00 | Window Closed / Lapsed |