Submicron High Molecular Weight Aqueous Ethylene Polymer Latices and process of producing the same

摘要

1,181,448. Ethylene polymer latices. NATIONAL DISTILLERS & CHEMICAL CORP. 19 Dec., 1967 [20 Dec., 1966], No. 57648/67. Heading C3P. Stable film-forming aqueous ethylene polymer latices containing particles of ethylene polymer of submicron size are prepared by a process which comprises homogeneously dispersing in water the polymer and at least 0À5, preferably 2 to 25, parts by weight per 100 parts of polymer of an emulsifier in the presence of at least 10, preferably 10 to 100, parts by weight per 100 parts of polymer of a volatile water-insoluble inert organic liquid that is soluble in the ethylene polymer above the softening temperature thereof and under a pressure sufficient to maintain the water and organic liquid in the liquid phase. The emulsifier may be a water-soluble polyoxyalkylene non-ionic emulsifier. The polymer may be polyethylene or a copolymer of ethylene with up to 75% of a higher olefin, acrylonitrile, vinyl chloride, vinyl acetate, styrene or vinyl toluene. The organic liquid may be decalin, ethyl cyclohexane, octane, decane, dodecane, tetradecane, xylene, ethyl benzene, cumene, methyl cyclohexene, tetralin, toluene, mesitylene, dibutyl ether of diethylene glycol, dibutyl ketone, phenyl ether or a chlorinated hydrocarbon. Examples describe the making of polyethylene latices using ethylene oxide/ propylene oxide block copolymer emulsifiers and mineral spirits, xylene, butyl ether, hexyl ether, ethyl cyclohexane, decalin, octane, decane, C 12-14 n-paraffins, benzene, toluene, mesitylene, ethyl benzene, cumene, methyl cyclohexene, tetralin, phenyl ether, phenetole dibutyl ketone and dibutyl ether of diethylene glycol.