| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject composition capable of exhibiting excellent storage stability and further exhibiting good curability at normal temperature without deteriorating curing characteristics when a curing agent is added thereto by making phenylphosphonic acids and an N-oxyl compound exist together in a resin composition. SOLUTION: This composition comprises (A) a radically curable resin (preferably an unsaturated polyester resin, a vinyl ester resin or the like) and (B) a metal compound having redox actions (e.g. a metal salt of an aliphatic carboxylic acid) and consists essentially of (C) phenylphosphonic acids (preferably phenylphosphonic acid, a phenylphosphonic acid ester or the like) and (D) an N-oxyl compound (e.g. 4-hydroxy-2,2,6,6-tetramethylpiperidin-1-oxyl). Furthermore, the contents of the components based on the whole resin composition are preferably 10-500 ppm of the component C expressed in terms of weight ratio and preferably 10-1,000 ppm of the component D expressed in terms of the weight ratio.
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