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US 5,856,562 AGranted
Method for inhibiting polymerization of (meth) acrylic acid or esters thereof
AssigneeMitsubishi Chemical Corporation
InventorsNorioki Mine, Tooru Segi
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Abstract
In a method for inhibiting the polymerization of (meth)acrylic acid or esters thereof, the improvement comprising using as a polymerization inhibitor a N-oxyl compound represented by the general formula (1): ##STR1## wherein X represents CH.sub.2, CHOH, C=O, CHCOCH.sub.3 or CHNHCOCH.sub.2, in combination with phosphine compound or a cobalt compound.
Claims8
In a method for inhibiting the polymerization of (meth)acrylic acid or esters thereof, the improvement comprising using as a polymerization inhibitor an N-oxyl compound represented by the general formula (1):
- ##STR4## wherein X represents CH.sub.2, CHOH, C=O, CHCOCH.sub.3 or CHNHCOCH.sub.3, in combination with a phosphine compound or a cobalt compound.
Dependencies are inferred from the claim text.