Nitroxide hydroxylamine and phenylenediamine combinations as polymerization inhibitors for ethylenically unsaturated monomer processes
AssigneeEcolab USA Inc.
InventorDavid Youdong Tong
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Abstract
Polymerization inhibitor compositions are provided. The polymerization inhibitor compositions may include at least one hydroxylamine of a nitroxide and at least one phenylenediamine. Methods of inhibiting the unwanted polymerization of monomers are also provided. The methods include adding the presently disclosed polymerization inhibitor compositions to a fluid containing the monomers. The monomers may be ethylenically unsaturated monomers, such as acrylic acid, methacrylic acid, acrylonitrile, methacrylonitrile, acrolein, methacrolein, acrylate, methacrylate, acrylamide, methacrylamide, vinyl acetate, butadiene, ethylene, propylene, and styrene.
Claims8
A method of inhibiting polymerization of an ethylenically unsaturated monomer comprising:
- providing a fluid comprising an ethylenically unsaturated monomer;
- adding an effective amount of a polymerization inhibitor composition to the fluid, wherein the polymerization inhibitor composition comprises an effective amount of a 2,2,6,6-tetramethyl piperidinol and an effective amount of at least one phenylenediamine;
- and
- inhibiting polymerization of the ethylenically unsaturated monomer.
Dependencies are inferred from the claim text.