Methods for inhibiting vinyl aromatic monomer polymerization

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

1994-06-30

1996-02-06

Cross, E. Rollins

Chemistry of hydrocarbon compounds

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

With nonhydrocarbon additive

585 4, 585 24, C07C 720

Patent

active

054897203

ABSTRACT:
An improved method for inhibiting the polymerization of vinyl aromatic monomer with a hydroxylamine compound is disclosed. The improvement provides for adding a catalytic amount of a phenylenediamine compound to the vinyl aromatic system while replacing any phenylenediamine compound lost as a result of physical removal from the system via the waste stream.

REFERENCES:
patent: 2965685 (1960-12-01), Campbell
patent: 4061545 (1977-12-01), Watson et al.
patent: 4466905 (1984-08-01), Butler et al.
patent: 4720566 (1988-01-01), Martin
patent: 4774374 (1988-09-01), Abruscato et al.
patent: 4929778 (1990-05-01), Roling

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