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US 10,766,848 B2Granted
Use of polymerization inhibitor compositions
AssigneeRhodia Operations
InventorsChristelle Chretien, Karel Vits, Lars Fischer, Yan Shi
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AssigneeRhodia Operations
InventorsChristelle Chretien, Karel Vits, Lars Fischer, Yan Shi
Estimating the term…
The present invention relates to the use of at least two phenol derivatives jointly with at least one ancillary polymerization inhibitor which is different from these two phenol derivatives and particularly is selected from phenol derivatives, amine derivatives, thiazine derivatives, nitroso compounds, N-oxyl derivatives, metal salts, quinone derivatives, and mixtures thereof, to inhibit the polymerization of ethylenically unsaturated monomers comprising at least one heteroatom, it being also possible for a dispersant to be incorporated. The present invention also relates to a corresponding polymerization-inhibiting composition and to the corresponding process for preparing ethylenically unsaturated monomers comprising at least one heteroatom, and particularly acrylic monomers.
A method for inhibiting polymerization of ethylenically unsaturated monomers that comprise at least one heteroatom, comprising manufacturing, purifying, storing, and/or transporting such monomers in the presence of at least two phenol derivatives and at least one ancillary polymerization inhibitor which is different from the two phenol derivatives, wherein the two phenol derivatives are para-methoxyphenol and pyrocatechol and the at least one ancillary polymerization inhibitor comprises hydroquinone and phenothiazine as a mixture.
Dependencies are inferred from the claim text.