Masonry-treating agent
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EXAMPLE 1
[0079] Into a 200 cc four-necked flask equipped with a stirrer, an inert gas inlet, a condenser and a thermometer, 13.0 g of CF3CF2CF2CF2CH2CH2OCOCCl═CH2, 6.5 g of stearyl acrylate, 0.5 g of γ-methacryloxypropyltrimethoxysilane (SZ6030 manufactured by Dow Corning Toray Co., Ltd.) and 113.3 g of tetrachlorohexafluorobutane (S-316 manufactured by Daikin Industries, Ltd.) were charged and heated to 60° C. A solution of t-butyl peroxypivalate (1.5 g) (PERBUTYL PV manufactured by NOF Corp.) in trichloroethane (7.3 g) was added and the polymerization reaction was conducted with stirring at 60° C. for at least 12 hours. A gas chromatography revealed that a polymerization reaction conversion was at least 97%. The resultant polymer solution was diluted with butyl acetate to give a treatment liquid having a solid content of 3%.
[0080] A surface of each of polished natural granite (mined in China, and purchased from Nittai Kogyo Kabushiki-Kaisha) and limestone (purchased from Inax Co...
Example
COMPARATIVE EXAMPLE 1
[0081] The polymerization reaction was conducted to give a polymer solution in the same procedure as in Example 1 except that CF3CF2CF2CF2CH2CH2OCOCCl═CH2 was changed to CF3CF2CF2CF2CH2CH2OCOCH═CH2. In the same manner as in Example 1, the polymer solution was diluted with butyl acetate to adjust the solid concentration to 3%, the treatment was conducted and the soil resistance test was conducted. The results are shown in Table 1 and Table 2.
Example
COMPARATIVE EXAMPLE 2
[0082] Into a 200 cc four-necked flask equipped with a stirrer, an inert gas inlet, a condenser and a thermometer, 13.0 g of CF3CF2CF2CF2CH2CH2OCOCCl═CH2, 7.0 g of stearyl acrylate and 113.3 g of tetrachlorohexafluorobutane (S-316 manufactured by Daikin Industries, Ltd.) were charged and heated to 60° C. A solution of t-butyl peroxypivalate (1.5 g) (PERBLTYL PV manufactured by NOF Corp.) in trichloroethane (7.3 g) was added and the polymerization reaction was conducted with stirring at 60° C. for at least 12 hours. A gas chromatography revealed that a polymerization reaction conversion was at least 97%. In the same manner as in Example 1, the polymer solution was diluted with butyl acetate to adjust the solid concentration to 3%, the treatment was conducted and the soil resistance test was conducted. The results are shown in Table 1 and Table 2.
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