| abstract |
A monomer composition stabilized against premature polymerization in the presence of water, consisting of: (A) an ethylenically unsaturated monomer, which is an unsaturated acid, an unsaturated amide, an unsaturated nitrile, an unsaturated ether, a vinylpyridine, a vinyl phosphonate of diethyl or sodium styrenesulfonate, and (B) an effective stabilizing amount of a compound of formula II in which R2 is alkyl of 3 to 5 carbon atoms interrupted by -COO- or by -CO, or R2 is -CH2 (OCH2CH2 ) pOCH3, in which p is a number from 1 to 4; or R 2 is -NHR 3, wherein R 3 is alkyl of 1 to 4 carbon atoms. |