Patent US4191820A successfully refreshed from Google Patents.
US4191820A
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Process for preparing polyalkylene polyamine polyethers
Assignee: BASF Corp
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Filing: 1978-01-03
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Granted: 1980-03-04
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Expires: 1998-01-03
Abstract
Abstract Non-gelled polyalkylenepolyamine polyethers are prepared by the reaction of ethylenediamine and polyepichlorohydrin in the presence of an organic solvent. The solvent enables the reactants to be present at less than a 3:1 ratio of polyamine per chlorine atom.
Inventors
- 👤 William K. Langdon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:10
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/54; C08; C08G; C08G73/00; C08G73/02; C08G73/024; D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/54
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
53 words
A method for preparing a water-soluble amine-derived polyether, comprising: reacting ethylenediamine with a halogen-containing polymer of an epihalohydrin in the presence of an organic solvent at a temperature ranging from about 120° C. to about 200° C., and wherein the ratio of moles of ethylenediamine per available halogen atom is less than 3:1.
Claim 2
Independent Claim
53 words
A method for preparing a water-soluble amine-derived polyether, comprising: reacting ethylenediamine with a halogen-containing polymer of an epihalohydrin in the presence of an organic solvent at a temperature ranging from about 120° C. to about 200° C., and wherein the ratio of moles of ethylenediamine per available halogen atom is less than 3:1.
Claim 3
Dependent Claim
21 words
The method of claim 1 wherein the reaction proceeds at a temperature of from about 120° C. to about 180° C.
Claim 4
Dependent Claim
23 words
The method of claim 1 wherein the solvent is selected from the group consisting of glycols, glycol ethers, aromatic hydrocarbons and mixtures thereof.
Claim 5
Dependent Claim
10 words
The method of claim 1 wherein: the epihalohydrin is epichlorohydrin.
Claim 6
Dependent Claim
11 words
The method of claim 1 wherein: the solvent is propylene glycol.
Claim 7
Dependent Claim
16 words
The method of claim 1 wherein: the epihalohydrin is epichlorohydrin and the solvent is propylene glycol.
Claim 8
Dependent Claim
35 words
The method of claim 1 wherein the polyether corresponds to the formula: ##STR3## and wherein Y is either an amine or polyamine function and n is an integer ranging from about one to about thirty.
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) | 1983-03-04 | 1983-09-03 | 1984-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-04 | 1987-09-03 | 1988-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-04 | 1991-09-03 | 1992-03-04 | $7700.00 | Window Closed / Lapsed |