| 摘要 |
1,214,720. Fog dispersal. DOW CHEMICAL CO. 20 Nov., 1968 [20 Nov., 1967], No. 55179/68. Heading A1X. A method of fog dispersal comprises contacting a mass of suspended atmospheric particles with a polymer in particulate form, the polymer having a molecular weight of at least 30,000. The polymer may have a charge which is opposite or different in magnitude from the suspended particles. The polymer may be watersoluble or water swellable and delivered in the form of dust or aqueous mist of average particle diameter 10-300 microns. The preferred polymers are: alkylenimine polymers, partially hydrolyzed acrylamide polymers, styrene sulphonate polymers and polyalkylene polyamines. The polymers may be polyelectrolytes, or non-ionic. They can also be hydrophilic. |
