US4250112A
Expired / Lapsed
US
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Polyalkylenepolyamines containing quaternary dialkylammonium groups
Assignee: Bayer AG
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Filing: 1979-05-08
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Granted: 1981-02-10
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Expires: 1999-05-08
Abstract
Abstract Water-soluble polyalkylenepolyamines which are not self-crosslinking and contain quaternary dialkylammonium groups, and which are obtained by reaction of polyalkylenepolyamines of the general formula <IMAGE> in which R denotes hydrogen or methyl, y denotes the number 0 or 1 and the y's may be identical or different and x denotes a number from 2 to 15, with bifunctional compounds of the general formula <IMAGE> in which z denotes a number from 1 to 6 and R1 and R2 denote lower alkyl or lower hydroxyalkyl, are suitable for use as auxiliaries in the manufacture of paper.
Inventors
- 👤 Wilfried Lobach
- 👤 Wolfgang Lehmann
- 👤 Friedhelm Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:35
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/54; C; C08; C08G; C08G73/00; C08G73/02; C08G73/0206; Y; Y10; Y10S; Y10S210/00; Y10S210/928
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
127 words
Water-soluble polyalkylenepolyamines which are not self-crosslinking and contain quaternary dialkylammonium groups, and are obtained by reaction in an aqueous medium at temperatures of 0° to 100° C., at a total concentration of 10 to 60%, and at pH values above 6 of polyalkylenepolyamines of the general formula ##STR7## in which R denotes hydrogen or methyl, y denotes the number 0 or 1 and the y's may be identical or different and x denotes a number from 2 to 15, with bifunctional compounds of the general formula ##STR8## in which z denotes an integer from 1 to 6 and R 1 and R 2 denote lower alkyl or lower hydroxylalkyl, 0.1 to 0.5 mol of the bifunctional compound being employed per mol of basic nitrogen of the polyalkylenepolyamine.
Claim 2
Dependent Claim
127 words
Water-soluble polyalkylenepolyamines which are not self-crosslinking and contain quaternary dialkylammonium groups, and are obtained by reaction in an aqueous medium at temperatures of 0° to 100° C., at a total concentration of 10 to 60%, and at pH values above 6 of polyalkylenepolyamines of the general formula ##STR7## in which R denotes hydrogen or methyl, y denotes the number 0 or 1 and the y's may be identical or different and x denotes a number from 2 to 15, with bifunctional compounds of the general formula ##STR8## in which z denotes an integer from 1 to 6 and R 1 and R 2 denote lower alkyl or lower hydroxylalkyl, 0.1 to 0.5 mol of the bifunctional compound being employed per mol of basic nitrogen of the polyalkylenepolyamine.
Claim 3
Dependent Claim
30 words
Water-soluble polyalkylenepolyamines according to claim 1, characterised in that the polyalkylenepolyamines employed are the mixtures obtained on reaction of 1 mol of 1,2-dichloroethane with 6 to 30 mols of ammonia.
Claim 4
Dependent Claim
44 words
Water-soluble polyalkylenepolyamines according to claim 1, characterised in that the aqueous solutions of the reaction products of 1 mol of HCl, z mols of dialkylamine and (z+1) mols of epichlorohydrin, wherein z can denote from 1 to 6, are employed as the bifunctional compound.
Claim 5
Dependent Claim
15 words
Water-soluble polyalkylenepolyamines according to claim 3, characterised in that dimethylamine is employed as the dialkylamine.
Claim 6
Dependent Claim
29 words
Water-soluble polyalkylenepolyamines according to claim 1, characterised in that in the form of 10% strength aqueous solutions they have a viscosity of at least 30 mPas at 25° C.
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) | 1984-02-10 | 1984-08-11 | 1985-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-10 | 1988-08-11 | 1989-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-10 | 1992-08-11 | 1993-02-10 | $7700.00 | Window Closed / Lapsed |