Hydrophobic-hydrophilic switchable polymers for use in agriculture

摘要

Providing a composition comprising a polymer selected from the group consisting of urethanes, urea ureas, thiocarbamates and mixtures thereof, wherein the polymer comprises hydrophobic segments and hydrophilic segments; and A method of controlling water retention of soil material used in agriculture comprising applying on top of the soil material used in to form a polymer film thereon, wherein the hydrophobic segment and the hydrophilic segment are provided Together bring about a reversible hydrophobic-hydrophilic switch in response to water, whereby the film surface is in contact with the film surface from a relatively hydrophobic state in dry conditions It switches to a relatively hydrophilic state in response to the presence of water.