US3692092A
Expired / Lapsed
US
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Paper containing a polyethylenimine-fatty acid epichlorohydrin product
Assignee: Dow Chemical Co
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Filing: 1971-04-01
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Granted: 1972-09-19
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Expires: 1991-04-01
Abstract
Abstract An improved polyethylenimine adduct for cellulosic products is prepared by condensing polyethylenimine with 0.05-0.4 mole of a C12-C22 fatty acid and thereafter capping the residual free amino groups by reaction in aqueous solution at 0*-50*C. with epichlorohydrin. The resulting product is an effective softener, sizing agent, and wet strength additive for paper and other cellulosic products with superior color stability and increased resistance to yellowing.
Inventors
- 👤 Juan Longoria
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:44
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/61; C; C08; C08G; C08G59/00; C08G59/02; C08G59/10; C08G73/00; C08G73/02; C08G73/0206; C08G73/0213; C08G73/022; D06M13/00; D06M13/322; D06M13/385; D06M13/402; D06M13/405; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/54; D21H17/55
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
19 words
The cellulosic product of claim 1 where the water-soluble polyethylenimine has an average molecular weight of about 500-5, 000.
Claim 2
Dependent Claim
13 words
The cellulosic product of claim 1 where the fatty acid is lauric acid.
Claim 3
Dependent Claim
13 words
The cellulosic product of claim 1 where the fatty acid is stearic acid.
Claim 4
Dependent Claim
13 words
The cellulosic product of claim 1 where the fatty acid is oleic acid.
Claim 5
Dependent Claim
13 words
The cellulosic product of claim 1 where the fatty acid is tall oil.
Claim 6
Dependent Claim
21 words
The cellulosic product of claim 2 containing about 0.5-2.5 weight percent of the polyethylenimine-fatty acid-epichlorohydrin condensation product as a sizing agent.
Claim 7
Dependent Claim
21 words
The cellulosic product of claim 2 containing about 0.1-2.0 weight percent of the polyethylenimine-fatty acid-epichlorohydrin condensation product as a softening agent.
References Cited (Backward Citations)
US2601597A
Cited
US2882185A
Cited
US2969302A
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US2926116A
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NL6612293A
Cited
US3313736A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |