WATER-ABSORBING POLYMER STRUCTURES WITH IMPROVED ABSORPTION PROPERTIES
First Claim
Patent Images
1. A process for the production of water-absorbing polymer structures, comprising the following steps:
- I providing an untreated water-absorbing polymer structure (Pu) having a retention determined according to the test method “
Determination of the Retention”
described herein from about 40 to about 50 g/g; and
II bringing into contact of the water-absorbing, untreated polymer structure (Pu) with a permeability-increasing agent.
5 Assignments
0 Petitions
Accused Products
Abstract
The present invention relates to a process for production of water-absorbing polymer structures comprising the process steps:
- I. providing an untreated, water-absorbing polymer structure (Pu) with a retention determined according to the test method described herein of at least about 35 g/g; and
- II. bringing into contact of this water-absorbing untreated polymer structure (Pu) with a permeability-increasing agent.
The invention further relates to the water-absorbing polymer structures obtainable by this process, water-absorbing polymer structures, a composite, a process for production of a composite, a composite obtainable by this process, chemical products comprising water-absorbing polymer structures or a composite as well as the use of water-absorbing polymer structures or of the composite in chemical products.
46 Citations
19 Claims
-
1. A process for the production of water-absorbing polymer structures, comprising the following steps:
-
I providing an untreated water-absorbing polymer structure (Pu) having a retention determined according to the test method “
Determination of the Retention”
described herein from about 40 to about 50 g/g; andII bringing into contact of the water-absorbing, untreated polymer structure (Pu) with a permeability-increasing agent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 11, 12)
-
-
10. A water-absorbing polymer structure having the following properties:
-
a a retention determined according to the herein-described test method of at least 32 g/g; and b a Time-dependent Absorption Against a Pressure (TAAP at 0.3 psi) determined according to the test method described herein of 20 g/cm2, (TAAP;
Time-dependent Absorption Against Pressure at 0.3 psi) selected from the group consisting of;b1 50% of the maximum absorption of the polymer structure within about 20 minutes and b2 90% of the maximum absorption of the polymer structure within about 40 minutes. - View Dependent Claims (13, 14, 15, 16, 17, 18)
-
-
19-20. -20. (canceled)
Specification