N-oxyl radicals
AssigneeBASF SE
InventorsSusanne Brinkmann-Rengel, Sylke Haremza, Heinz Friedrich Sutoris, David Christie, Roman Benedikt Raether, Jizhuang Cao
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Abstract
The present invention provides a process for the free radical polymerization of one or more ethylenically unsaturated monomers, said process comprising polymerizing one or more ethylenically unsaturated monomers in the presence of one or more N-oxyl radicals of formula II, wherein X is S, NR5, O, SO or SO2, R5 is C1-C20-alkyl or C5-C8-cycloalkyl and R3 and R4 independently of one another, are C1-C4-alkyl, phenyl, naphthyl or an aromatic five-membered ring, or R3 and R4 together are —(CH2)o— and p and o, independently of one another, are an integer from 2 to 7.
Claims14
A process for the free radical polymerization of one or more ethylenically unsaturated monomers, said process comprising polymerizing one or more ethylenically unsaturated monomers in the presence of one or more N-oxyl radicals of formula II,
- wherein
- X is S, NR5, O, SO or SO2,
- R5 is C1-C20-alkyl or C5-C8-cycloalkyl and
- R3 and R4 independently of one another, are C1-C4-alkyl, phenyl, naphthyl or an aromatic five-membered ring, or R3 and R4 together are —(CH2)o— and p and o, independently
- of one another, are an integer from 2 to 7.
Dependencies are inferred from the claim text.