Transparent film

A transparent film having a polysiloxane backbone,

• wherein the transparent film has a structure (a) in which a fluorine-containing group having a perfluoroalkyl group or a perfluoropolyether group on the free end side thereof is bonded to a silicon atom of the polysiloxane backbone,
• the fluorine-containing group having the perfluoroalkyl group on the free end side thereof is a group represented by the following formula (3-1) or (4-1),
• in the formula (3-1),
• Rf represents a fluorine atom or an alkyl group which has 1 to 20 carbon atoms and is substituted with one or more fluorine atoms,
• Rf2 each independently represents a fluorine atom or an alkyl group which has 1 to 20 carbon atoms and is substituted with one or more fluorine atoms, R3 each independently represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms,
• D each independently represents —O—, —COO—, —OCO—, —NR—, —NRCO—, or —CONR—, wherein R represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a fluorine-containing alkyl group having 1 to 4 carbon atoms,
• a2, c2, d2, and e2 are each independently an integer of not less than 0 and not more than 600, and the sum total of a2, b2, c2, d2, and e2 is 13 or more,
• b2 is not less than 20 and not more than 600,
• in the formula (4-1),
• Rf represents a fluorine atom or an alkyl group which has 1 to 20 carbon atoms and is substituted with one or more fluorine atoms,
• Rf3 each independently represents a fluorine atom or an alkyl group which has 1 to 20 carbon atoms and is substituted with one or more fluorine atoms, R5 each independently represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms,
• G each independently represents —O—, —COO—, —OCO—, —NR—, —NRCO—, or —CONR—, wherein R represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a fluorine-containing alkyl group having 1 to 4 carbon atoms,
• Y each independently represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms,
• Z represents a hydrogen atom or a halogen atom,
• a3, c3, d3, and e3 are each independently an integer of not less than 0 and not more than 600, and the sum total of a3, b3, c3, d3, and e3 is 13 or more,
• b3 is not less than 20 and not more than 600,
• h3 is an integer of not less than 0 and not more than 2,
• q is an integer of not less than 1 and not more than 10,
• the fluorine-containing groups are bonded to some silicon atoms of the polysiloxane backbone in the structure (a),
• the transparent film has a structure (b) in which carbon fluoride-containing groups or hydrolysable silane oligomer residue are bonded to some of the remaining silicon atoms of the polysiloxane backbone,
• the molecular length of the structure (b) is shorter than the molecular length of the structure (a), and
• the transparent film has a slip rate of 0.2 mm/s or more for a 120 μl waterdrop on an 8° incline.