US4056510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amine-modified polyethers
Assignee: Dow Chemical Co
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Filing: 1975-01-23
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Granted: 1977-11-01
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Expires: 1995-01-23
Abstract
Abstract Water-soluble amine-modified polyethers are made by reacting an excess of alkylene polyamine such as ethylenediamine or diethylenetriamine with a halogen-containing polyether prepared by Reacting with a poly epoxide: A. a halogen-containing alkylene oxide monomer, or B. a mixture thereof with a non-halogen-containing alkylene oxide monomer, wherein said mixture contains at least about 50 mole percent of said halogen-containing monomer. These amine modified polyethers may be additionally crosslinked by reacting with a difunctional compound, e.g. ethylene dichloride, to an extent which does not appreciably affect its solubility in water. The products are useful as drainage aids in paper pulp slurries and as flocculants.
Inventors
- 👤 Richard H. Symm
- 👤 Byford D. Sheffield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:15
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/22; C08G65/24; C08G65/26; C08G65/32; C08G65/329; C08G65/333; C08G65/33303; C08G65/33306
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
60 words
A water-soluble amine-modified polyether made by reacting an excess of an alkylene polyamine with a halogen-containing polyether prepared by reacting with 0.1 to 10 mole percent of a poly-1,2-epoxide: a. a halogen-containing alkylene oxide monomer, or b. a mixture thereof with a non-halogen-containing alkylene oxide monomer, wherein said mixture contains at least about 50 mole percent of said halogen-containing monomer.
Claim 2
Dependent Claim
60 words
A water-soluble amine-modified polyether made by reacting an excess of an alkylene polyamine with a halogen-containing polyether prepared by reacting with 0.1 to 10 mole percent of a poly-1,2-epoxide: a. a halogen-containing alkylene oxide monomer, or b. a mixture thereof with a non-halogen-containing alkylene oxide monomer, wherein said mixture contains at least about 50 mole percent of said halogen-containing monomer.
Claim 3
Dependent Claim
13 words
The product of claim 1 wherein the halogen-containing alkylene oxide monomer is epichlorohydrin.
Claim 4
Dependent Claim
11 words
The product of claim 1 wherein the alkylene polyamine is ethylenediamine.
Claim 5
Dependent Claim
14 words
The product of claim 2 wherein the non-halogen-containing alkylene oxide monomer is ethylene oxide.
Claim 6
Dependent Claim
13 words
The product of claim 1 wherein the polyepoxide is an aryl glycidyl ether.
Claim 7
Dependent Claim
17 words
The product of claim 5 wherein the aryl glycidyl ether is the diglycidyl ether of bisphenol A.
Claim 8
Dependent Claim
34 words
A water-soluble amine-modified polyether made by reacting an excess of ethylene diamine with a halogen containing polyether prepared by reacting epichlorohydrin with 0.1 to 10 mole percent of the diglycidyl ether of bisphenol A.
Claim 9
Dependent Claim
34 words
A water-soluble amine-modified polyether made by reacting an excess of ethylene diamine with a halogen containing polyether prepared by reacting epichlorohydrin with 0.1 to 10 mole percent of the diglycidyl ether of bisphenol A.
Claim 10
Dependent Claim
20 words
The product of claim 7 wherein there is employed at least 2 moles of ethylene diamine per atom of chlorine.
Claim 11
Dependent Claim
37 words
The product of claim 8 which has been additionally crosslinked by reacting it with a difunctional crosslinking agent in sufficient amount to obtain a significant increase in viscosity but not sufficient to obtain substantial insolubility in water.
Claim 12
Dependent Claim
13 words
The product of claim 9 wherein the difunctional crosslinking agent is ethylene dichloride.
Claim 13
Dependent Claim
13 words
The product of claim 9 wherein the difunctional crosslinking agent is a diepoxide.
Claim 14
Dependent Claim
15 words
The product of claim 11 wherein the diepoxide is the diglycidyl ether of bisphenol A.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-31 | 1981-05-02 | 1981-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-31 | 1985-05-02 | 1985-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-31 | 1989-05-02 | 1989-11-01 | $7700.00 | Window Closed / Lapsed |