Process for producing methyl methacrylate polymers

Details Process for producing methyl methacrylate polymers Process for producing methyl methacrylate polymers

1975-02-04

1976-07-06

Holler, Alan

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

Synthetic resins

Removing and recycling removed material from an ongoing...

260 895A, 260 895S, C08F 202, C08F 628, C08F 2014, C08F 2018

Patent

active

039680592

ABSTRACT:
A process of producing methyl methacrylate polymers is provided wherein the monomer are polymerized by a bulk polymerization procedure at 150.degree. to 180.degree.C with a conversion of 50 to 80% and the volatiles predominantly comprised of the unreacted monomer, separated from the polymer product, are cyclically reused as a part of the monomer feed for polymerization. In such a monomer feed cycle system, oligomers are substantially removed from the volatiles and then the volatiles are blended with a virgin monomer feed for polymerization, the content in the volatiles of impurities having boiling points of lower than 200.degree.C at normal pressure is maintained within the range of 5 to 20% by weight.

REFERENCES:
patent: 2714101 (1955-07-01), Amos et al.
patent: 3234303 (1966-02-01), Bild et al.
patent: 3637545 (1972-01-01), Fivel
patent: 3806556 (1974-04-01), Paleologo et al.
patent: 3821330 (1974-06-01), Free
patent: 3900453 (1975-08-01), Shimada et al.

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