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US 9,957,209 B2Granted
Use of quinone methides as antipolymerants for vinylic monomers
AssigneeEcolab USA Inc.
InventorsJonathan Masere, Ramon Colorado, Jr.
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Abstract
The present invention generally relates to compounds and methods for inhibiting the radical polymerization of unsaturated compounds, particularly vinyl monomers. More particularly, it relates to the use of cinnamyl quinone methides to inhibit the polymerization of unsaturated hydrocarbon compounds (e.g., vinyl monomers) soluble in organic solvents, particularly hydrocarbon streams.
Claims20
A method for inhibiting polymerization of a compound comprising an unsaturated carbon-carbon bond, the method comprising contacting said compound with an effective amount of a substituted quinone methide compound of Formula 1:
- wherein R1 and R2 are independently hydrogen, C4-C18 alkyl, C5-C12 cycloalkyl, aryl, C7-C15 arylalkyl, or C7-C15 alkylaryl;
- and
- R3 is hydrogen, C1-C18 alkyl, C5-C12 cycloalkyl, C5-C12 heterocycloalkyl, aryl, C7-C15 arylalkyl, or C7-C15 alkylaryl;
- and
- wherein the substituted quinone methide compound of Formula 1 inhibits polymerization of the compound comprising an unsaturated carbon-carbon bond.
2 more elements
Dependencies are inferred from the claim text.