Ketone bisulfites as reducing agent for free radical polymerizat

Details Ketone bisulfites as reducing agent for free radical polymerizat Ketone bisulfites as reducing agent for free radical polymerizat

1981-10-23

1982-11-23

Schofer, Joseph L.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

526 94, 523410, 524808, 524813, 524832, C08L 2302

Patent

active

043606326

ABSTRACT:
This invention relates to an improvement in a process for producing a latex containing dispersed polymer. The improvement in the process for polymerizing a reaction mixture of vinyl monomer, stabilizer, oxidizing agent and reducing agent comprises using a water-soluble ketone bisulfite as the reducing agent, either alone or with other reducing agents, the ketone having from 3 to 8 carbon atoms in the structure. During the polymerization, the ketone bisulfite is maintained in stoichiometric excess of the oxidizing agent. Vinyl acetate-ethylene copolymers are some of the preferred polymer systems produced.

REFERENCES:
patent: 2383055 (1945-08-01), Fryling
patent: 2560694 (1951-07-01), Howard, Jr.
patent: 2716107 (1955-08-01), Brown
patent: 3637626 (1972-01-01), Mazzolini et al.
patent: 3700456 (1972-10-01), Smith
patent: 4035329 (1977-07-01), Wiest et al.
patent: 4094849 (1978-06-01), Oyamada et al.

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