US4606773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emulsification of alkenyl succinic anhydride sizing agents
Assignee: Ecolab USA Inc
•
Filing: 1984-12-10
•
Granted: 1986-08-19
•
Expires: 2004-12-10
Abstract
Abstract Emulsion of alkenyl succinic anhydride sizing agents are prepared using a cationic water-soluble polymer and a cationic starch as an emulsifier.
Inventors
- 👤 Robert W. Novak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:55
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/41; D21H17/44; D21H17/03; D21H17/05; D21H17/14; D21H17/15; D21H17/21; D21H17/24; D21H17/28; D21H17/29
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
62 words
In a method for emulsification of alkenyl succinic anhydride type paper sizing wherein a water-soluble polymer is used as an emulsification aid, the improvement comprising using as the water-soluble polymer a cationically modified polymer having a molecular weight ranging between 20,000-750,000 in conjunction with a water-soluble cationic starch, and wherein the cationic starch to polymer weight ratio is between 75:25 to 25:75.
Claim 2
Dependent Claim
62 words
In a method for emulsification of alkenyl succinic anhydride type paper sizing wherein a water-soluble polymer is used as an emulsification aid, the improvement comprising using as the water-soluble polymer a cationically modified polymer having a molecular weight ranging between 20,000-750,000 in conjunction with a water-soluble cationic starch, and wherein the cationic starch to polymer weight ratio is between 75:25 to 25:75.
Claim 3
Dependent Claim
14 words
The improvement of claim 1 wherein the cationic starch is a cationic potato starch.
Claim 4
Dependent Claim
14 words
The improvement of claim 1 wherein the cationic starch is a cationic corn starch.
Claim 5
Dependent Claim
56 words
An alkenyl succinic anhydride emulsion containing: 40-99.9 percent by weight water 0.01-40 percent by weight ASA 0.01-10 percent by weight of a water-soluble cationically modified polymer having a molecular weight ranging between 20,000-750,000, and 0.01-10 percent by weight of a cationic starch, and wherein the cationic starch to polymer weight ratio is between 75:25 to 25:75.
Claim 6
Dependent Claim
56 words
An alkenyl succinic anhydride emulsion containing: 40-99.9 percent by weight water 0.01-40 percent by weight ASA 0.01-10 percent by weight of a water-soluble cationically modified polymer having a molecular weight ranging between 20,000-750,000, and 0.01-10 percent by weight of a cationic starch, and wherein the cationic starch to polymer weight ratio is between 75:25 to 25:75.
Claim 7
Dependent Claim
13 words
The emulsion of claim 4 wherein the starch is a cationic potato starch.
Claim 8
Dependent Claim
13 words
The emulsion of claim 4 wherein the starch is a cationic corn starch.
Claim 9
Independent Claim
74 words
A method of forming an emulsion of an alkenyl succinic anhdyride in water which comprises dispersing from 0.01-40 weight percent of alkenyl succinic anhydride in water and adding to such suspension from 0.01-7.5 weight percent of an aqueous solution containing from 25:75 to 75:25 by weight of a cationic starch and cationic water-soluble polymer having a molecular weight between 20,000-750,000 so as to provide from 0.010-10 weight percent of the polymer in the emulsion.
Claim 10
Independent Claim
74 words
A method of forming an emulsion of an alkenyl succinic anhdyride in water which comprises dispersing from 0.01-40 weight percent of alkenyl succinic anhydride in water and adding to such suspension from 0.01-7.5 weight percent of an aqueous solution containing from 25:75 to 75:25 by weight of a cationic starch and cationic water-soluble polymer having a molecular weight between 20,000-750,000 so as to provide from 0.010-10 weight percent of the polymer in the emulsion.
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) | 1989-08-18 | 1990-02-17 | 1990-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-18 | 1994-02-17 | 1994-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-18 | 1998-02-17 | 1998-08-19 | $7700.00 | Window Closed / Lapsed |