Stabilization of unsaturated carboxylic acid esters with mixtures of polyalkyleneamines and arylenediamines
AssigneeMonsanto Company
InventorGene Ray Wilder
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Abstract
A method of inhibiting polymerization of unsaturated carboxylic acid esters and improved unsaturated carboxylic acid ester compositions are described. The method comprises, and the compositions are prepared by, incorporating into the ester composition a combination comprising polyalkyleneamine and arylenediamine of the formula ##STR1## in which X is hydrogen, chloro, trichloromethyl, trifluoromethyl, nitro, lower alkyl, lower alkoxy or phenoxy, R is hydrogen or alkyl, and R.sub.1 is alkyl or phenyl or R and R.sub.1 together with the nitrogen atom is a heterocycle selected from the group consisting of pyrrolidinyl, 2,5-dimethyl pyrrolidinyl, piperidino and hexahydro-1H-azepin-1-yl.
Claims14
An inhibitor composition comprising polyalkyleneamine which is an acyclic aliphatic compound having amino groups attached through alkylene of 1-10 carbon atoms and arylenediamine of the formula ##STR3## in which X is hydrogen, chloro, trichloromethyl, trifluoromethyl, nitro, lower alkyl, lower alkoxy, or phenoxy, R is hydrogen or alkyl, R.sub.1 is alkyl or phenyl, or R and R.sub.1 together with the nitrogen atom is a heterocyclic radical selected from the group consisting of pyrrolidinyl, 2,5-dimethylpyrrolidinyl, piperidino and hexahydro-1H-azepin-1-yl in which the polyalkyleneamine is 10-90 parts by weight and the arylenediamine is 10-90 parts by weight per 100 parts by weight of the inhibitor composition.
Dependencies are inferred from the claim text.