Patent ID: 6900346

Claim:
A method for the decomposition of a Michael type adduct of acrylic acid and/or acrylic ester, characterized by causing a Michael type adduct of acrylic acid and/or acrylic ester represented by the following formula [I] or [II] to react in the presence of an N-oxyl compound thereby decomposing said Michael type adduct into acrylic acid and/or acrylic ester and/or alcohol in the range of 130° C. to 180° C. CH 2 ═CHCOO—(—X—COO) n —R 1 [I] (wherein n denotes an integer of 1-5, R 1 denotes a hydrogen atom or an alkyl group, and —X— denotes —CH 2 CH 2 — or —CH(CH 3 )—, providing that the plurality of —X— may be identical or not identical when n is not less than 2 R 2 —O—(—X—COO) tn —R 3 [II] (wherein m denotes an integer of 1-5, R 2 and R 3 independently denote a hydrogen atom or an alkyl group, and —X— denotes —CH 2 CH 2 — or —CH(CH 3 )—, providing that the plurality of —X— may be identical or not identical when m is not less than 2.