Patent ID: 6287483
Filing Date: 2001-09-11
Classification: C07B,C07C,C09K

Abstract:
A method for stabilizing a polymerizable ethylenically unsaturated organic compound from premature polymerization, comprising:adding to the unsaturated organic compound an effective amount for premature polymerization inhibition, of a polymerization inhibitor including at least one compound having the formula: ##STR7##wherein X is --H, --OH, --O.cndot., --NO.sub.2, or --CH.sub.3,R.sup.1, R.sup.2, R.sup.4 and R.sup.5 are the same or different and each is selected from the group consisting of hydrogen, an aliphatic moiety having from 1 to about 20 carbon atoms, aryl, alkaryl or aralkyl having from 6 to about 12 carbon atoms, alicyclic and heterocyclic, or R.sup.1 and R.sup.2 together or R4 and R.sup.5 together form part of an alicyclic or heterocyclic moiety having from about 4 to about 10 ring members,R.sup.3 is hydrogen or an aliphatic moiety having from 1 to about 20 carbon atoms, and z is 0 or 1 and where z is 1, Y is O bonded to N in the form of an N.fwdarw.O moiety,wherein the unsaturated organic compound is selected from the group consisting of styrene, methylstyrene, divinylbenzene, butadiene, isoprene, vinyl chloride, chloroprene, vinylidene chloride, vinylidene fluoride, vinyl fluoride, acrylic acid, methacrylic acid, crotonic acid, vinyl acetate, methyl methacrylate, ethyl acrylate, methyl acrylate, 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, ethylene bismethacrylate, trimethylolpropane triacrylate, acrylated epoxy resin, polyethylene glycol diacrylate, acrylamide, N,N-dimethylacrylamide, methylene-bisacrylamide, N-vinylpyrrolidone, acrylonitrile, methyl vinyl ether, vinyl pyridine, diethyl vinylphosphonate and sodium styrenesulfonate.