Polymeric compositions useful as plant growing media additives

Details Polymeric compositions useful as plant growing media additives Polymeric compositions useful as plant growing media additives

C - Chemistry, Metallurgy

09

K

402/404, 71/53,

C09K 17/00 (2006.01) A01G 31/00 (2006.01) C05G 3/00 (2006.01) C09K 17/16 (2006.01) C09K 17/22 (2006.01)

Patent

CA 1216997

Abstract Superabsorbent gel compositions useful as plant growing media additives are prepared from a copolymer of acrylamide and acrylic acid salt in a molar ratio of 70:30 to 95:5, cross-linked such that less than 30% by weight of the dry polymer is water-soluble and the gel can absorb releasably at least 15 times its own weight of water. The gel composition is therefore tailored to the needs of an agricultural/horticultural context because it has long-term stability in natural soil, low solubility that would otherwise lead to poor soil properties, and good water absorbency. Preferred gel compositions in foam form are described.

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