Patent US5267191A successfully refreshed from Google Patents.
Patent US4254255A successfully refreshed from Google Patents.
US4254255A
Expired / Lapsed
US
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Aqueous reaction of polyamine with alkylene dihalide in presence of emulsifier
Assignee: Bayer AG
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Filing: 1979-01-19
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Granted: 1981-03-03
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Expires: 1999-01-19
Abstract
Abstract Water-soluble condensation products which are not self-crosslinking and are prepared from polyacidic amines and compounds which are polyfunctional towards amino groups, in an aqueous medium at temperatures from 0° to 120° C. and pH values above 6 in the presence of emulsifiers are used in the production of paper.
Inventors
- 👤 Wilfried Lobach
- 👤 Wolfgang Lehmann
- 👤 Friedhelm Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:42
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/54; C; C08; C08G; C08G73/00; C08G73/02; C08G73/0206; C08G73/028
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
76 words
A process for the preparation of a water-soluble condensation produce which is not self-crosslinking, comprising reacting a polyamine selected from the group consisting of a polyalkylenepolyamine, a reaction product of a dicarboxylic acid and excess polyalkylenepolyamine and a reaction product of a dicarboxylic acid, aminocarboxylic acid or lactam thereof and excess polyalkylenepolyamine, with an alkylene dihalide in an aqueous medium at 0° to 120° C. and a pH above 6 in the presence of an emulsifier.
Claim 2
Dependent Claim
76 words
A process for the preparation of a water-soluble condensation produce which is not self-crosslinking, comprising reacting a polyamine selected from the group consisting of a polyalkylenepolyamine, a reaction product of a dicarboxylic acid and excess polyalkylenepolyamine and a reaction product of a dicarboxylic acid, aminocarboxylic acid or lactam thereof and excess polyalkylenepolyamine, with an alkylene dihalide in an aqueous medium at 0° to 120° C. and a pH above 6 in the presence of an emulsifier.
Claim 3
Dependent Claim
13 words
A process according to claim 1 in which the polyamine is a polyalkylenepolyamine.
Claim 4
Dependent Claim
13 words
A process according to claim 1, in which the polyamine contains amide groups.
Claim 5
Dependent Claim
20 words
A process according to claim 1, in which the polyamine comprises a mixture of polyalkylenepolyamines and polyamines containing amide groups.
Claim 6
Dependent Claim
13 words
A process according to claim 1, in which the alkylene dihalide is 1,2-dichloroethane.
Claim 7
Dependent Claim
12 words
A process according to claim 1, in which the emulsifier is non-ionic.
Claim 8
Dependent Claim
22 words
A process according to claim 1, in which the emulsifier is an oxyethylation product of a fatty alcohol or unsaturated fatty acid.
Claim 9
Dependent Claim
29 words
A process according to claim 1, in which the emulsifier is present in 0.08 to 0.01% relative to the weight of a 22.5% strength solution of the condensation products.
References Cited (Backward Citations)
GB775721A
Cited
US2969302A
Cited
US3125552A
Cited
US3239491A
Cited
GB1035296A
Cited
US3972939A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-02 | 1984-09-01 | 1985-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-02 | 1988-09-01 | 1989-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-02 | 1992-09-01 | 1993-03-03 | $7700.00 | Window Closed / Lapsed |