Process for the solid phase polymerization of acrylonitrile from

Details Process for the solid phase polymerization of acrylonitrile from Process for the solid phase polymerization of acrylonitrile from

1990-09-14

1992-08-04

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526341, 526342, 526220, 526225, 525242, 525255, 525259, 525261, C08F 234

Patent

active

051359979

ABSTRACT:
This invention relates to a process for the radical homo-or copolymerization of acrylonitrile with one or more copolymerizable monomers under reaction conditions such that the monomers are present predominantly in a gaseous form of an adsorbed form and polymerization of the monomers, which are presumably adsorbed, takes place in the solid phase (solvent-free polymerization) and results in pulverulent PAN-(co)polymers. The process is preferably carried out in the presence of small quantities of a mediator substance such as dimethylformamide which does not alter the pulverulent consistency of the PAN-polymers but leads considerably more rapidly and with much improved yields to freshly formed polyacrylonitrile polymers.

REFERENCES:
patent: 2961432 (1960-11-01), Fikentscher
patent: 3787365 (1974-01-01), Melacini

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