Polymerization co-inhibitors for vinyl aromatic compounds

Details Polymerization co-inhibitors for vinyl aromatic compounds Polymerization co-inhibitors for vinyl aromatic compounds

1983-01-10

1984-08-21

Nucker, Christine M.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

526 83, 526 84, 526 85, C09K 1526, C08F 238

Patent

active

044669046

ABSTRACT:
A compound and a process for utilizing the compound to prevent the polymerization of vinyl aromatic compounds, such as styrene, during heating. The compound includes effective amounts of phenothiazine, 4-tert-butylcatechol and 2,6-dinitro-p-cresol respectively, as a polymerization inhibitor system in the presence of oxygen resulting in a less viscous polymer tar and in the effective inhibition of polymerization to temperatures as high as 150.degree. C.

REFERENCES:
patent: 1950438 (1934-02-01), Carothers et al.
patent: 2225471 (1940-12-01), Foord
patent: 2576009 (1951-11-01), Goertz et al.
patent: 3265659 (1966-08-01), Kobayashi et al.
patent: 4343956 (1982-08-01), Jackisch
Murphy et al., Industrial & Engineering Chemistry, vol. 42 (1950), pp. 2479-2489.

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