Methods for inhibiting ethylenically unsaturated monomers

Details Methods for inhibiting ethylenically unsaturated monomers Methods for inhibiting ethylenically unsaturated monomers

1994-01-14

1995-05-16

McFarlane, Anthony

Chemistry of hydrocarbon compounds

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

With nonhydrocarbon additive

585 5, 585601, C07C 720

Patent

active

054162580

ABSTRACT:
Methods and compositions are provided for inhibiting the polymerization of butadiene-containing streams during elevated temperature processing thereof or during storage or shipment of monomer containing product. The composition comprises a combination of (a) a phenylenediamine compound having at least one N--H bond and (b) a hydroxytoluene compound. The methods comprise adding from about 1-250 ppm of the combination to the monomer medium, per one million parts of medium.

REFERENCES:
patent: 4929778 (1990-05-01), Roling
patent: 5043504 (1991-08-01), Bedell
patent: 5345030 (1994-09-01), Sun et al.
Taimr & Pospisil,l "An Investigation of the Synergism between N-isopropyl-N'-phenyl-1, 4-phenylenediamine and 2,6-dialkylphenols," Antioxidants and Stabilizers, 98 (1984), pp. 181-188.
Taimr & Pospisil, "A Cooperative Effect between Antioxidants N-isopropyl-N'-phenyl-1,4-phenylene diamine and 2,6-di-tert-butylphenol," Polymer Degradation and Stability, 8 (1984), pp. 23-35.

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