Crosslinked, porous polymers for controlled delivery of...

Details Crosslinked, porous polymers for controlled delivery of... Crosslinked, porous polymers for controlled delivery of...

A - Human Necessities

01

N

71/47

A01N 25/10 (2006.01) C08F 290/06 (2006.01)

Patent

CA 1263816

Crosslinked, porous polymers for controlled delivery of agricultural ingredients Abstract of the disclosure A controlled-release, delivery composition which comprises (A) a crosslinked copolymer, capable of swelling in ethanol to give a swollen copolymer containing at least 40 % by weight of ethonal, and capable of swelling in water to give a swollen copolymer containing no more than 20 % by weight of water, where the swelling ratio (% ethanol: % water) is 2:1 to 22:1, which comprises the copoly- merization product of (a) 50 to 99 % by weight of said copolymer of a water-insoluble monoolefinic monomer or (a) with 0 to 45 % weight of total monomers of a water-soluble monoolefinic monomer, with (b) 50 to 1 % by weight, but not more than 20 mol % of a divinyl or polyvinyl crosslinking agent; and (B) an effective amount of an active agricultural ingredient is useful for the controlled and prolonged release of siad ingredient.

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