Claims
- 1. A process for producing a water-absorbing agent, comprising the step of heating in the presence of a surface-crosslinking agent a water-absorbent resin having an absorption capacity of 40 (g/g) or more and an amount of an eluting component of 1 part by weight or less per 100 parts by weight of the water-absorbent resin.
- 2. A process according to claim 1, wherein the water-absorbent resin is beforehand treated with a hydrophilic solution.
- 3. A process according to claim 1, further comprising the step of treating under heat the water-absorbent resin with first and second surface-crosslinking agents.
- 4. A process according to claim 3, wherein the first surface-crosslinking agent has a solubility parameter between 12.5 and 15.0.
- 5. A process according to claim 3, wherein the second surface-crosslinking agent has a solubility parameter less than 12.5.
- 6. A process according to claim 3, wherein the first surface-crosslinking agent has a solubility parameter between 12.5 and 15.0 and wherein the second surface-crosslinking agent has a solubility parameter less than 12.5.
- 7. A process according to claim 3, wherein the first surface-crosslinking agent has a solubility parameter between 12.5 and 15.0 and can react with a carboxyl group.
- 8. A process according to claim 3, wherein the second surface-crosslinking agent has a solubility parameter less than 12.5 and can react with a carboxyl group.
- 9. A process according to claim 3, wherein the first surface-crosslinking agent has a solubility parameter between 12.5 and 15.0, wherein the second surface-crosslinking agent has a solubility parameter less than 12.5, and wherein each of the first and second crosslinking agents can react with a carboxyl group.
Priority Claims (2)
Number |
Date |
Country |
Kind |
8-271950 |
Oct 1996 |
JPX |
|
9-011762 |
Jan 1997 |
JPX |
|
Parent Case Info
This application is a divisional application of U.S. patent application Ser. No. 08/947,094 filed Oct. 8, 1997.
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Divisions (1)
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Number |
Date |
Country |
Parent |
947094 |
Oct 1997 |
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