Compacted absorbent polymers the production thereof and the use of the same
The present invention relates to compacted superabsorbers, producible in that a mixture, at least comprising synthetic particulate superabsorber, is subjected to a specific contact force or to a pressure, processes for producing such superabsorbers, composites produced from superabsorbers of this type and the use of such superabsorbers.
1 . A compacted superabsorber, comprising a composition at least comprising a synthetic particulate superabsorber an inorganic binding agent subjected to a specific contact force of at least about 3 kN/cm or a pressure of at least about 3 kN/cm 2 , wherein more than about 5% of the particles used have a particle size of about 250 μm or less.
2 . The compacted superabsorber according to claim 1 , wherein the inorganic binding agent in the form of an aqueous solution is mixed with the superabsorber before the compacting.
3 . The compacted superabsorber according to claim 1 , wherein the inorganic binding agent is an inorganic salt of a polyvalent cation.
4 . The compacted superabsorber according to claim 3 , wherein the inorganic salt is used in the form of an aqueous solution, in which the inorganic salt comprises in a concentration of about 20 to about 70 wt. %.
5 . The compacted superabsorber according to claim 3 , wherein the inorganic binding agent comprises an aqueous solution of Al 2 (SO 4 ) 3 .18 H 2 O.
6 . The compacted superabsorber according to claim 1 , wherein more than about 35% of the particles used have a particle size of about 150 μm or less.
7 . The compacted superabsorber according to claim 1 , wherein the composition has a water content of at least about 1 wt. %.
8 . The compacted superabsorber according to claim 1 , wherein the particulate superabsorber is a post-crosslinked superabsorber.
9 . A process for producing compacted superabsorbers, the process comprising providing a composition at least comprising synthetic particulate superabsorber and an inorganic binding agent; and compacting the composition to a specific contact force of at least about 3 kN/cm or a pressure of at least about 3 kN/cm 2 , wherein more than about 5% of the particles used have a particle size of about 250 μm or less.
10 . The process according to claim 9 , wherein the inorganic binding agent in the form of an aqueous solution is mixed with the superabsorber before the compacting.
11 . The process according to claim 9 , wherein the inorganic binding agent is an inorganic salt of a polyvalent cation.
12 . The process according to claim 11 , wherein the inorganic salt is used in the form of an aqueous solution, in which the inorganic salt is comprised in a concentration of about 20 to about 70 wt. %.
13 . The process according to claim 11 , wherein the inorganic binding agent comprises an aqueous solution of Al 2 (SO 4 ) 3 .18 H 2 O.
14 . The process according to claim 9 , wherein more than about 35% of the particles used have a particle size of less than about 150 μm.
15 . The process according to claim 9 , wherein the particles before the compacting are mixed with at least about 1 wt. % water, based on the weight of the total particles used for compacting.
16 . The process according to claim 9 , wherein the particulate superabsorber is a post-crosslinked superabsorber.
17 . A process for producing a composite, the process comprising contacting a compacted superabsorber according to of claim 1 with a substrate.
18 . A composite produced by the process according to claim 17 .
19 . The compacted superabsorber according to claim 1 comprising at least one of a foam, a formed body, a fibre, a sheet, a film, a cable, a sealing material, a liquid-absorbing hygiene article, a carrier for a plant, a fungus growth-regulating agent, a packaging material, a soil additive, and a building material.
20 . A use of a compacted superabsorber according to claim 1 , the use comprising at least one of a foam, a formed body, a fibre, a sheet, a film, a cable, a sealing material, a liquid-absorbing hygene article, a carrier for a plant, a fungus growth-regulating agent, a packaging materials, a soil additive and building material.
21 . The compacted superabsorber according to claim 2 , wherein the inorganic binding agent is an inorganic salt of a polyvalent cation.
22 . The compacted superabsorber according to claim 21 , wherein the inorganic salt is used in the form of an aqueous solution, in which the inorganic salt is comprised in a concentration of about 20 to about 70 wt. %.
23 . The compacted superabsorber according to claim 4 , wherein the inorganic binding agent comprises an aqueous solution of Al 2 (SO 4 ) 3 .18 H 2 O.
24 . The compacted superabsorber according to claim 21 , wherein the inorganic binding agent comprising an aqueous solution of Al 2 (SO 4 ) 3 .18 H 2 O.
25 . The compacted superabsorber according to claim 22 , wherein the inorganic binding agent an aqueous solution of Al 2 (SO 4 ) 3 .18 H 2 O.
26 . The compacted superabsorber according to claim 2 , wherein more than about 35% of the particles used have a particle size of about 150 μm or less.
27 . The compacted superabsorber according to claim 3 , wherein more than about 35% of the particles used have a particle size of about 150 μm or less.
28 . The compacted superabsorber according to claim 4 , wherein more than about 35% of the particles used have a particle size of about 150 μm or less.
29 . The compacted superabsorber according to claim 5 , wherein more than about 35% of the particles used have a particle size of about 150 μm or less.
30 . The compacted superabsorber according to claim 3 , wherein the composition has a water content of at least about 1 wt. %.
31 . The compacted superabsorber according to claim 5 , wherein the composition has a water content of at least about 1 wt. %.
32 . The compacted superabsorber according to claim 6 , wherein the composition has a water content of at least about 1 wt. %.
33 . The compacted superabsorber according to claim 3 , wherein the particulate superabsorber is a post-crosslinked superabsorber.
34 . The compacted superabsorber according to claim 5 , wherein the particulate superabsorber is a post-crosslinked superabsorber.
35 . The compacted superabsorber according to claim 6 , wherein the particulate superabsorber is a post-crosslinked superabsorber.
36 . The compacted superabsorber according to claim 7 , wherein the particulate superabsorber is a post-crosslinked superabsorber.
37 . The process according to claim 10 , wherein the inorganic binding agent is an inorganic salt of a polyvalent cation.
38 . The process according to claim 37 , wherein the inorganic salt is used in the form of an aqueous solution, in which the inorganic salt is comprised in a concentration of about 20 to about 70 wt. %.
39 . The process according to claim 12 , wherein the inorganic binding agent comprises an aqueous solution of Al 2 (SO 4 ) 3 .18 H 2 O.
40 . The process according to claim 11 , wherein more than about 35% of the particles used have a particle size of less than about 150 μm.
41 . The process according to claim 12 , wherein more than about 35% of the particles used have a particle size of less than about 150 μm.
42 . The process according to claim 13 , wherein more than about 35% of the particles used have a particle size of less than about 150 μm.
43 . The process according to claim 11 , wherein the particles before the compacting are mixed with at least about 1 wt. % water, based on the weight of the total particles used for compacting.
44 . The process according to claim 12 , wherein the particles before the compacting are mixed with at least about 1 wt. % water, based on the weight of the total particles used for compacting.
45 . The process according to claim 13 , wherein the particles before the compacting are mixed with at least about 1 wt. % water, based on the weight of the total particles used for compacting.
46 . The process according to claim 14 , wherein the particles before the compacting are mixed with at least about 1 wt. % water, based on the weight of the total particles used for compacting.
47 . The process according to claim 12 , wherein the particulate superabsorber is a post-crosslinked superabsorber.
48 . The process according to claim 14 , wherein the particulate superabsorber is a post-crosslinked superabsorber.
49 . The process according to claim 15 , wherein the particulate superabsorber is a post-crosslinked superabsorber.
50 . A process for producing a composite, the process comprising contacting a compacted superabsorber according to claims 2 with a substrate.
51 . A composite produced by the process according to claim 50 .
52 . A process for producing a composite, the process comprising contacting a compacted superabsorber according to claims 3 with a substrate.
53 . A composite produced by the process according to claim 52 .
54 . A process for producing a composite, the process comprising contacting a compacted superabsorber according to claims 4 with a substrate.
55 . A composite produced by the process according to claim 54 .
56 . A process for producing a composite, the process comprising contacting a compacted superabsorber according to claims 5 with a substrate.
57 . A composite produced by the process according to claim 56 .
58 . A process for producing a composite, the process comprising contacting a compacted superabsorber according to claims 6 with a substrate.
59 . A composite produced by the process according to claim 58 .
60 . A process for producing a composite, the process comprising contacting a compacted superabsorber according to claims 7 with a substrate.
61 . A composite produced by the process according to claim 60 .
62 . A process for producing a composite, the process comprising contacting a compacted superabsorber according to claims 8 with a substrate.
63 . A composite produced by the process according to claim 62 .
64 . The compacted superabsorber according to claim 2 comprising at least one of a foam, a formed body, a fibre, a sheet, a film, a cable, a sealing material, a liquid-absorbing hygiene article, a carrier for a plant, a fungus growth-regulating agent, a packaging materials, a soil additives and building material.
65 . The compacted superabsorber according to claim 3 comprising at least one of a foam, a formed body, a fibre, a sheet, a film, a cable, a sealing material, a liquid-absorbing hygiene article, a carrier for a plant, a fungus growth-regulating agent, a packaging materials, a soil additives and building material.
66 . The compacted superabsorber according to claim 4 comprising at least one of a foam, a formed body, a fibre, a sheet, a film, a cable, a sealing material, a liquid-absorbing hygiene article, a carrier for a plant, a fungus growth-regulating agent, a packaging materials, a soil additives and building material.
67 . The compacted superabsorber according to claim 5 comprising at least one of a foam, a formed body, a fibre, a sheet, a film, a cable, a sealing material, a liquid-absorbing hygiene article, a carrier for a plant, a fungus growth-regulating agent, a packaging materials, a soil additives and building material.
68 . The compacted superabsorber according to claim 6 comprising at least one of a foam, a formed body, a fibre, a sheet, a film, a cable, a sealing material, a liquid-absorbing hygiene article, a carrier for a plant, a fungus growth-regulating agent, a packaging materials, a soil additives and building material.
69 . The compacted superabsorber according to claim 7 comprising at least one of a foam, a formed body, a fibre, a sheet, a film, a cable, a sealing material, a liquid-absorbing hygiene article, a carrier for a plant, a fungus growth-regulating agent, a packaging materials, a soil additives and building material.
70 . The compacted superabsorber according to claim 8 comprising at least one of a foam, a formed body, a fibre, a sheet, a film, a cable, a sealing material, a liquid-absorbing hygiene article, a carrier for a plant, a fungus growth-regulating agent, a packaging materials, a soil additives and building material.
71 . A use of a composite according to claim 17 , the use comprising at least one of a foam, a formed body, a fibre, a sheet, a film, a cable, a sealing material, a liquid-absorbing hygiene article, a carrier for a plant, a fungus growth-regulating agent, a packaging materials, a soil additive and building material.