Method of polymerizing acrylonitrile with certain acidic monomer

Details Method of polymerizing acrylonitrile with certain acidic monomer Method of polymerizing acrylonitrile with certain acidic monomer

1975-05-14

1979-07-31

Hoke, V. P.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 87, 526240, 526304, 526334, 526342, C08F22046

Patent

active

041630890

ABSTRACT:
The process of continuously polymerizing acrylonitrile and other non-acidic mono-olefinic monomers with small amounts of certain acidic mono-olefinic monomers copolymerizable with acrylonitrile wherein the acrylonitrile and other non-acidic mono-olefinic monomers are continuously charged to a reactor and the acidic monomer is fed to the reactor in increments and in cycles, with a tall amount in a given cycle of 0.5 to 5 weight percent of the acidic monomer, based on total monomer weight fed in the cycle, being fed to the reactor during each cycle. Each cycle is made up of two time periods, with at least 65 percent of the acidic monomer being fed during the first time period and up to 35 percent being fed during the second time period. Preferably, all of the acidic monomer is fed to the reactor in the first time period. The first time period of the cycle is 5 to 25 percent of the second time period and the sum of first and second time periods, or cycle time, is about 15 to 25 percent of the reactor dwell time.

REFERENCES:
patent: 3002956 (1961-10-01), Perri
patent: 3033833 (1962-05-01), Le Fevre et al.
patent: 3256252 (1966-06-01), Kruckenberg et al.
patent: 3310535 (1967-03-01), Mazzolini et al.
patent: 3426104 (1969-02-01), Masson
patent: 3547899 (1970-12-01), Arlt et al.

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