http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-2632959-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_95c89084d61fd47ae93470ca7c96f184 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2333-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2300-14 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J20-267 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F6-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F6-008 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J3-245 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J3-24 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F2-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J3-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F20-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61L15-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61L15-60 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F6-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J3-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J3-24 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61L15-60 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61L15-22 |
| filingDate | 2011-10-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e694648ba6a9e7b7fa4620dc2edaee87 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c464e79ac474d2a15445b863f346b088 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_fd9dbabcf0c8e16cae568f2339019f3b http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4aabe29aa6a494110fc0d8699ce39e4d |
| publicationDate | 2013-09-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-2632959-A1 |
| titleOfInvention | Method for producing improved absorbing polymers by means of cryogenic grinding |
| abstract | The invention relates to a method for producing a water-absorbing polymer, comprising the following steps: (i) mixing (a1) 0.1 to 99.99 wt.%, preferably 20 to 98.99 wt.%, and particularly preferably 30 to 98.95 wt.% of polymerized, ethylenically unsaturated, acid-group-containing monomers or the salts thereof, or polymerized, ethylenically unsaturated monomers containing a protonated or quarternized nitrogen, or the mixtures thereof, wherein mixtures containing at least ethylenically unsaturated, acid-group-containing monomers, preferably acrylic acid, are particularly preferred, optionally partially neutralized, (a2) 0 to 70 wt.%, preferably 1 to 60 wt.%, and particularly preferably 1 to 40 wt.% of polymerized, ethylenically unsaturated monomers that can be copolymerized with (a1), (a3) 0.001 to 10 wt.%, preferably 0.01 to 7 wt.%, and particularly preferably 0.05 to 5 wt.% of one or more cross-linking agents, (a4) 0 to 30 wt.%, preferably 1 to 20 wt.%, and particularly preferably 5 to 10 wt.% of water-soluble polymers, and (a5) 0 to 20 wt.%, preferably 0.01 to 7 wt.%, and particularly preferably 0.05 to 5 wt.% of one or more auxiliary substances, wherein the sum of the weights (a1) to (a5) is 100 wt.%; (ii) radically polymerizing, with cross-linking, so as to form a water-insoluble, aqueous untreated hydrogel polymer; (iii) coarsely comminuting the untreated hydrogel polymer into pieces having a diameter in the range of 0.1 mm to 5.0 cm; (iv) cooling the pre-comminuted untreated hydrogel polymer and grinding the cooled untreated hydrogel polymer; (v) drying the comminuted untreated hydrogel polymer after grinding at a temperature in the range of 85ºC to 260ºC and sifting the dried pieces in the range of 150 µm to 850 µm; (vi) post-crosslinking the hydrogel polymer; and (vii) drying and packaging the water-absorbing polymer. The invention further relates to the use thereof. |
| priorityDate | 2010-10-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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