| 主权项 |
1. A method of producing a water-repellent and oil-repellent composition,
the method comprising: producing an incompletely condensed product P1 containing a fluorine-containing alkoxy silane unit derived from a fluorine-containing alkoxy silane compound represented by formula (1) in an alcohol-based solvent; and producing a condensed product P2 by further condensing the incompletely condensed product P1 with an alkoxy silane compound represented by formula (2) in the alcohol-based solvent:
Rf—Yq-Ap-Z—SiX3 (1), wherein, in the formula (1): Rf represents a perfluoroalkyl group having 1 to 6 carbon atoms; Y represents an alkanediyl group represented by —(CH2)m—, m represents an integer of 1 to 4, and q represents 0 or 1; A represents a linking group represented by —CO—O—, —O—CO—, —O—, —S—, —CO—S—, —CONH—, —NHCO—, —NHCO—O—, —O—CONH—, or —NHCONH—, and p represents 0 or 1, provided that when p represents 0, q represents 0; Z represents an alkanediyl group represented by —(CH2)n—, and n represents an integer of 1 to 20; and each X independently represents an alkoxy group represented by —OCrH2r+1, and r represents an integer of 1 to 4;
R—SiX3 (2), wherein, in the formula (2): R represents an alkyl group having 1 to 6 carbon atoms; and each X independently represents an alkoxy group represented by —OCrH2r+1, and r represents an integer of 1 to 4. |
