US4167393A
Expired / Lapsed
US
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Method for binding a water-soluble direct dye to paper
Assignee: Dow Chemical Co
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Filing: 1978-08-21
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Granted: 1979-09-11
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Expires: 1998-08-21
Abstract
Abstract The method of binding a water-soluble, direct dye to paper is improved by using as a binder the reaction product of a polyalkylene polyamine and a quaternary ammonium salt. For example, the direct dye Intralite® Yellow 2RLSW manufactured by Crompton & Knowles bound to paper toweling by the reaction product of a polyethylenimine having a number average molecular weight of about 40,000 and 3-chloro-2-hydroxypropyl trimethylammonium chloride demonstrates improved bleed resistance under alkaline conditions than when bound to similar paper toweling by conventional binders, such as polyethylenimine or other cationic, nitrogen-containing polymers.
Inventors
- 👤 Anthony M. de Roo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:18
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/02; C09D11/10; C09D11/102
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
100 words
In a method of binding a water-soluble, direct dye to paper using a binder, the improvement wherein the binder is the reaction product of a polyalkylene polyamine having a number average molecular weight of at least about 10,000 and between about 0.1 and about 0.75 equivalent weights of a quaternary ammonium salt of the formula ##STR6## wherein R"-R IV are hydrocarbyl radicals of 1 to 3 carbon atoms, R V is a substituted hydrocarbyl of 3 to 5 carbon atoms with the substituents being a halogen and a hydroxyl group on adjacent carbon atoms, and Aθ is a neutralizing anion.
Claim 2
Dependent Claim
100 words
In a method of binding a water-soluble, direct dye to paper using a binder, the improvement wherein the binder is the reaction product of a polyalkylene polyamine having a number average molecular weight of at least about 10,000 and between about 0.1 and about 0.75 equivalent weights of a quaternary ammonium salt of the formula ##STR6## wherein R"-R IV are hydrocarbyl radicals of 1 to 3 carbon atoms, R V is a substituted hydrocarbyl of 3 to 5 carbon atoms with the substituents being a halogen and a hydroxyl group on adjacent carbon atoms, and Aθ is a neutralizing anion.
Claim 3
Dependent Claim
20 words
The method of claim 1 wherein the number average molecular weight of the polyalkylene polyamine is at least about 20,000.
Claim 4
Dependent Claim
22 words
The method of claim 1 wherein the number average molecular weight of the polyalkylene polyamine is between about 40,000 and about 60,000.
Claim 5
Dependent Claim
11 words
The method of claim 3 wherein the polyalkylene polyamine is branched.
Claim 6
Dependent Claim
20 words
The method of claim 4 wherein the polyalkylene polyamine is the reaction product of ethylene diamine oligomers and ethylene dichloride.
Claim 7
Dependent Claim
14 words
The method of claim 5 wherein the quaternary ammonium salt is 3-chloro-2-hydroxypropyl trimethylammonium chloride.
Claim 8
Dependent Claim
26 words
The method of claim 6 wherein the polyalkylene polyamine and quaternary ammonium salt are contacted at a temperature between about 20° C. and about 80° C.
Claim 9
Dependent Claim
25 words
The method of claim 7 wherein between about 0.25 and about 0.75 equivalent weights of the quaternary ammonium salt is reacted with the polyalkylene polyamine.
References Cited (Backward Citations)
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US3141728A
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US3372129A
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US3479215A
Cited
US3778225A
Cited
US3728214A
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US3969283A
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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) | 1982-09-10 | 1983-03-12 | 1983-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-10 | 1987-03-12 | 1987-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-10 | 1991-03-12 | 1991-09-11 | $7700.00 | Window Closed / Lapsed |