| 摘要 |
PROBLEM TO BE SOLVED: To obtain and to develop a curing agent composition of unsaturated polyester putty and FRP, excellent in storage stability. SOLUTION: A curing agent composition remarkably improved in storage stability and the like can be obtained by combination of an ester compound represented by the following formula I or phosphonic acid represented by the following formula II alone or together with the curing agent, respectively. Formula I:R1-CO-O-R2 Formula II:H2O3P-X(-PO3H2)n (In formula I, R1 is a 1-6C alkyl, and R2 is a 2-20C alkyl in the total carbon number containing at least one ether bond. In formula II, X is a crosslinking group which means a 1-20C crosslinking group not containing different atoms or containing 1-5 different atoms in the crosslinking chain, and (n) is an integer of 1-10.
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