| 摘要 |
A method and composition for forming a thin film of evaporation retarding agent upon a water surface by applying to the water, solid macroscopic particles of a saturated, aliphatic, interface-active hydrocarbon in solid solution with a spreading agent, e.g., a polyethylene glycol, that is soluble in both water and the hydrocarbon. Preferably, the particles are admixed with solid macroscopic particles of a filler material capable of generating a gas upon contact with water and compacted into a tablet, pellet or other solid unitary form for application to a water surface.
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