CURABLE WATER-SWELLING WATERSTOP MATERIAL, WATERSTOP STEEL SHEET PILE, WATERSTOP STEEL SHEET PILE PRODUCTION METHOD, AND WATER-STOPPING METHOD
World Intellectual Property Organization Patent
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Abstract
Provided is a curable water-swelling waterstop material, which is friendly to the environment and to workers, has excellent adhesiveness to metal, and has sufficient swelling rate and swollen body membrane strength; also provided are a waterstop steel sheet pile, a waterstop steel sheet pile production method, and a water-stopping method. This curable water-swelling water-stop material contains 0.3 to 25 parts by mass of an aminosilane coupling agent (C), 20 to 250 parts by mass of a water-absorbing resin (D), and 0 to 160 parts by mass of an extender pigment (E), with respect to 100 parts by mass of a resin ingredient comprising 40 to 100 parts by mass of a curable resin (A) having a hydrolysable alkoxysilyl group represented by '-X-CH2-SiR1Y(OR2)3-Y', and 0 to 60 parts by mass of polyether polyol (B). (In the formula, X represents a bonding functional group wherein a heteroatom having an unshared electron pair is bonded to a methylene group bonded to the silicon atom contained in the hydrolysable silicon group, each of R1 and R2 represents an alkyl group having 1 to 3 carbons, and Y represents 0, 1 or 2.)
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