US4714727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous emulsion coating for individual fibers of a cellulosic sheet providing improved wet strength
Assignee: HB Fuller Licensing and Financing Inc
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Filing: 1984-07-25
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Granted: 1987-12-22
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Expires: 2004-07-25
Abstract
Abstract A basic aqueous emulsion composition that can be used as a treatment for cellulosic sheets or articles made of cellulosic fibers to provide improved water resistance by forming a discrete coating on the individual fibers that make up the sheet while not substantially limiting the compatibility of the treated sheet with aqueous glues, dyes or inks comprising a major proportion of water, a mixture of wax and rosin, an emulsion stabilizer and a chelating agent.
Inventors
- 👤 Robert M. Hume, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:30
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; D; D21; D21H; D21H17/00; D21H17/60; D21H17/62; C08J2393/00; C08J2393/04
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
132 words
A basic emulsion composition, that can provide water resistance to a cellulosic sheet while preserving its affinity with aqueous compositions, which comprises in an emulsion: (a) a major proportion of water; (b) an effective water resistance providing amount comprising about 0.02 to 15 wt-% based upon the total emulsion composition of a mixture of a wax compound and a rosin compound; (c) an effective amount comprising about 0.01 to 5 wt-% based upon the total emulsion composition of an emulsion stabilizer comprising the reaction product of a relatively strong basic component and a relatively weak acidic component; and (d) an effective amount comprising about 0.01 to 10 wt-% of the total emulsion composition of a chelating agent resulting in the chelation of ionic species in the water and in the cellulosic sheet.
Claim 2
Dependent Claim
132 words
A basic emulsion composition, that can provide water resistance to a cellulosic sheet while preserving its affinity with aqueous compositions, which comprises in an emulsion: (a) a major proportion of water; (b) an effective water resistance providing amount comprising about 0.02 to 15 wt-% based upon the total emulsion composition of a mixture of a wax compound and a rosin compound; (c) an effective amount comprising about 0.01 to 5 wt-% based upon the total emulsion composition of an emulsion stabilizer comprising the reaction product of a relatively strong basic component and a relatively weak acidic component; and (d) an effective amount comprising about 0.01 to 10 wt-% of the total emulsion composition of a chelating agent resulting in the chelation of ionic species in the water and in the cellulosic sheet.
Claim 3
Dependent Claim
14 words
The emulsion composition of claim 1 wherein the wax compound is a paraffin wax.
Claim 4
Dependent Claim
18 words
The emulsion composition of claim 1 wherein the rosin compound comprises a hydrogenated or partially hydrogenated wood rosin.
Claim 5
Dependent Claim
33 words
The emulsion composition of claim 1 wherein the emulsion has a pH greater than 8 and the relatively strong basic component of the emulsion stabilizer is ammonia, monoethanolamine, diethanolamine, triethanolamine, or mixtures thereof.
Claim 6
Dependent Claim
33 words
The emulsion composition of claim 1 wherein the relatively weak acidic component of the emulsion stabilizer comprises a C 8-24 fatty acid, an addition polymer having pendent carboxylic acid groups, or mixtures thereof.
Claim 7
Dependent Claim
18 words
The emulsion composition of claim 1 wherein the chelating agent is ethylenediamine tetraacetic acid or a salt thereof.
Claim 8
Dependent Claim
15 words
The emulsion composition of claim 1 wherein the basic emulsion additionally comprises a protective colloid.
Claim 9
Dependent Claim
13 words
The emulsion composition of claim 7 wherein the protective colloid is polyvinyl alcohol.
Claim 10
Dependent Claim
19 words
The emulsion composition of claim 1 which additionally comprises an antifoam agent, a preservative, a dye, or mixtures thereof.
Claim 11
Dependent Claim
14 words
The emulsion composition of claim 4 having a pH of about 8 to 10.
Claim 12
Dependent Claim
16 words
The emulsion composition of claim 1 having a density of 8 pounds per gallon or greater.
Claim 13
Dependent Claim
16 words
The emulsion composition of claim 1 wherein the emulsion contains about 0.01 to 10 wt-% solids.
Claim 14
Dependent Claim
35 words
The emulsion composition of claim 1 wherein the emulsion also contains an effective strength enhancing amount of an addition polymer selected from the group consisting of styrene-butadiene-styrene copolymers, acrylamide polymers, methylmethacrylate polymers, and mixtures thereof.
Claim 15
Dependent Claim
38 words
The emulsion composition of claim 1 wherein the wax compound is a petroleum wax compound, and the chelating agent is selected from the group consisting of ethylenediamine tetracetic acid, its salts, citric acid, its salts, and mixtures thereof.
Claim 16
Dependent Claim
70 words
The composition of claim 1 wherein the wax compound is a petroleum wax compound, the emulsion stabilizer comprises the reaction product of i) ammonia, monethanolamine, diethanolamine, triethanolamine, or mixtures thereof, and (ii) a C 8-24 fatty acid, an addition polymer having pendent carboxylic acid groups, or mixtures thereof, and the chelating agent comprises citric acid, a salt of citric acid, ethylenediacetic acid, a salt of ethylenediacetic acid, or mixtures thereof.
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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) | 1990-12-21 | 1991-06-22 | 1991-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-21 | 1995-06-22 | 1995-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-21 | 1999-06-22 | 1999-12-22 | $7700.00 | Window Closed / Lapsed |