Lion Specialty Chemicals Co., Ltd.

Ken Yamada

Takaaki Kano

Hiroyuki Izumoto

Minako Matoba

Rieko Oba

The invention provides a soil improvement agent composition which contains (A) a fatty acid polyoxyalkylene alkyl ether represented by formula (1): RCO (EO)m (PO)n OR(1) wherein Ris a straight-chain or branched hydrocarbon group having 13 to 21 carbon atoms, EO represents ethylene oxide, m is a number of 2 to 10, PO represents propylene oxide, n is a number of 1 to 4, and Ris a hydrocarbon group having 1 to 3 carbon atoms; and (B) a polyoxyalkylene alkyl ether represented by formula (2): RO (EO)x (PO)y H (2) wherein Ris a straight-chain or branched hydrocarbon group having 8 to 14 carbon atoms, EO represents ethylene oxide, x is a number of 7 to 12, PO represents propylene oxide, and y is a number of 0 to 3.

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Tokyo, Japan

Ken Yamada