Methods for inhibiting vinyl aromatic monomer polymerization

Details Methods for inhibiting vinyl aromatic monomer polymerization Methods for inhibiting vinyl aromatic monomer polymerization

1994-08-24

1995-08-29

Pal, Asok

Chemistry of hydrocarbon compounds

Product blend, e.g., composition, etc., or blending process...

With nonhydrocarbon additive

585 3, 585 4, C07C 720

Patent

active

054462207

ABSTRACT:
Methods for inhibiting the polymerization of vinyl aromatic monomers in oxygen-free processing systems are disclosed. These methods comprise adding from 1 to about 10,000 parts per million parts monomer of a combination of a dinitrophenol compound, a hydroxylamine compound and a phenylenediamine compound. Preferably, 2-sec-butyl-4,6-dinitrophenol or 4,6-dinitro-o-cresol are used in combination with bis-(hydroxypropyl)hydroxylamine and N,N' -di-sec-butyl-p-phenylenediamine.

REFERENCES:
patent: 4105506 (1977-12-01), Watson et al.
patent: 4466905 (1987-08-01), Butler et al.
patent: 4720566 (1988-01-01), Martin
patent: 4774374 (1988-09-01), Abruscato et al.
patent: 5245760 (1993-10-01), Winter et al.

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