http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-2997051-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/C08F222-102 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2333-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08K5-0008 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F220-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J3-245 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01J20-261 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L33-14 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F120-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L33-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K3-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F20-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F220-06 |
| filingDate | 2014-04-29-04:00^^<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_ba23264c3a5b8b74115fdaac57f8cc17 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_114640a26ebe2edf9e49c7651973dc35 |
| publicationDate | 2016-03-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-2997051-A1 |
| titleOfInvention | Superabsorbent polymers with rapid absorption properties and process for producing same |
| abstract | The present invention relates to a process for producing a water-absorbing polymer, comprising the steps of (i) mixing (α1) from 0.1 to 99.999% by weight, preferably from 20 to 98.99% by weight and particularly preferably from 30 to 98.95% by weight, of polymerizable, ethylenically unsaturated monomers containing acid groups, or salts of said monomers, or polymerizable, ethylenically unsaturated monomers including a protonated or quaternized nitrogen, or a mixture of these, where particular preference is given to mixtures at least including ethylenically unsaturated monomers containing acid groups, preferably acrylic acid, (α2) from 0 to 70% by weight, preferably from 1 to 60% by weight and particularly preferably from 1 to 40% by weight, of polymerized, ethylenically unsaturated monomers copolymerizable with (α1), (α3) from 0.001 to 10% by weight, preferably from 0.01 to 7% by weight and particularly preferably from 0.05 to 5% by weight, of one or more crosslinking agents, (α4) from 0 to 30% by weight, preferably from 1 to 20% by weight and particularly preferably from 5 to 10% by weight, of water-soluble polymers, and (α5) from 0 to 20% by weight, preferably from 0.01 to 7% by weight and particularly preferably from 0.05 to 5% by weight, of one or more auxiliaries, where the total of the quantities by weight of (α1) to (α5) is 100% by weight, (ii) free-radical polymerization with crosslinking, in order to form a water-insoluble, aqueous untreated hydrogel polymer, (iii) drying of the hydrogel polymer, (iv) grinding and isolation by sieving of the water-absorbing polymer, (v) surface post-crosslinking of the ground and sieved hydrogel polymer and (vi) drying and finishing of the water-absorbing polymer, where the following are added to the aqueous free-radical polymerization: from 0.01 to 5% by weight, preferably from 0.02 to 2% by weight and particularly preferably from 0.07 to 1% by weight, of a blowing agent with particle size from 10 μm to 900 μm, based on the hydrogel polymer, optionally from 0.01 to 5% by weight, preferably from 0.02 to 2% by weight and particularly preferably from 0.07 to 1% by weight, of at least one surfactant from the group of the non-ionic, ionic or amphoteric surfactants, and in the steps (ii) to (iv) or before the step (v) also at least one acidic compound, process for producing a hydrogel polymer, the product of the process, and the use. |
| priorityDate | 2013-05-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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