MODIFIED SUPERABSORBENT POLYMER CONTAINING A FERTILIZER
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United States of America Patent
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app pub date -
Jan 30, 2015
filing date -
Jan 30, 2014
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Abstract
A modified superabsorbent polymer (SAP) comprises a SAP matrix and urea in the form of crystals that is integrated into the SAP matrix. The SAP matrix and the urea are interpenetrated. A method for producing the modified SAP may comprise a) preparing a mixture comprising at least one urea solution and at least one SAP, b) swelling the SAP in the mixture, c) crystallizing the urea in the mixture obtained upon completion of step b), d) recovering the modified SAP in the mixture, and e) optionally, forming the modified SAP recovered at step d).
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International Classification(s)
- C05G:MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DI....
- C09K:MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED ....
- C08J:WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTE....
- C05C:NITROGENOUS FERTILISERS
- A61F:FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES....
- B01J:CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS, CO....
- A01G:HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, ....
- C08K:USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUB....
- A01C:PLANTING; SOWING; FERTILISING
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