Claims
- 1. A method of preparing an absorbent article coated with a substantially dry water swellable polyelectrolyte which comprises
- a. applying a coating on a relatively thin article wherein the coating comprises
- 1. a solution of a carboxylic synthetic polyelectrolyte wherein the solution consists of water, lower alcohols, or mixtures thereof and about 5 to about 60% by weight of a carboxylic polyelectrolyte, and
- 2.
- 2. at least about 0.1% by weight based on the polyelectrolyte of a crosslinking agent reactive with carboxylate groups,
- B. heating said coated article to a temperature greater than about
- 30.degree. C. to crosslink said polyelectrolyte. 2. The method of claim 1 wherein the article is a natural or a synthetic fibrous substrate.
- 3. The method of claim 1 wherein the article is a synthetic film.
- 4. The method of claim 1 wherein the article is a foamed polymer.
- 5. The coated article produced by the method of claim 1.
- 6. The coated article produced by the method of claim 2.
- 7. The coated article produced by the method of claim 3.
- 8. The Coated article produced by the method of claim 4.
- 9. A method as set forth in claim 1 wherein the crosslinking agent is present in the range from 0.1 - 10% by weight.
- 10. A method as set forth in claim 1 wherein the carboxylic polyelectrolyte consists of a terpolymer of ethyl acrylate, sodium acrylate, and sodium methacrylate with 50 mole percent being ethyl acrylate.
- 11. A method as set forth in claim 1 wherein the carboxylic polyelectrolyte consists of polysodium acrylate.
- 12. A method as set forth in claim 1 wherein the carboxylic polyelectrolyte consists of poly(isobutylenecodisodium maleate).
- 13. A method as set forth in claim 1 wherein the crosslinking agent is the diglycidyl ether of polypropylene glycol.
- 14. The method as set forth in claim 1 wherein said crosslinking agent is selected from polyhaloalkanols, sulfonium zwitterions, haloepoxyalkanes, polyglycidyl ethers, and mixtures thereof.
- 15. The method as set forth in claim 1 wherein the crosslinking agent is a polyglycidyl ether.
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a divisional application of Ser. No. 468,794 filed May 9, 1974 now U.S. Pat No. 3,985,663, patented Sept. 14, 1976, which is a continuation-in-part of Ser. No. 371,909, filed June 20, 1973 which is now abandoned.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
3245933 |
Muskat |
Apr 1966 |
|
3467604 |
Michaels |
Sep 1969 |
|
Divisions (1)
|
Number |
Date |
Country |
Parent |
468794 |
May 1974 |
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Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
371909 |
Jun 1973 |
|