Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1978-04-24
1979-08-14
Wong, Jr., Harry
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
526 65, 526331, C08F21002, C08L 2304
Patent
active
041644891
ABSTRACT:
This invention relates to an improved continuous process for producing vinyl acetate-ethylene copolymer emulsions. The improvement for continuous polymerization of vinyl acetate and ethylene comprises continuously charging a reaction mixture containing vinyl acetate and ethylene to a polymerization vessel, conducting an initial polymerization of the vinyl acetate and ethylene in the presence of a seed latex under ethylene pressure and continuously removing the thus formed latex from the initial polymerization vessel at an unreacted vinyl acetate monomer content from 5-20% by weight of the latex and then effecting a post polymerization of the unreacted vinyl acetate at an ethylene pressure of not more than about 300 psia until the unreacted vinyl acetate in the latex is less than 1% by weight.
REFERENCES:
patent: 2200429 (1940-05-01), Perrin et al.
patent: 2703794 (1955-03-01), Roedel
patent: 3325460 (1967-06-01), Schellenberg et al.
patent: 3534009 (1970-10-01), Beresniewicz
patent: 3708388 (1973-01-01), Lindemann et al.
patent: 4035329 (1977-07-01), Wiest et al.
Daniels Wiley E.
Lenney William E.
Air Products and Chemicals Inc.
Brewer Russell L.
Innis E. Eugene
Moyerman Barry
Wong, Jr. Harry
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