Electronic device

A mobile phone or a smartphone comprising a surface-treating layer formed on at least a part of a surface thereof, wherein the mobile phone or the smartphone is an electronic device that is driven by a battery, and the surface-treating layer is formed of a fluoro (poly) ether group-containing silane compound represented by any of the following formulae (B1), (B2), (C1), or (C2):

• wherein:
• PFPE is each independently at each occurrence
• a group represented by the formula:
• —(OC6F12)a—(OC5F10)b—(OC4F8)c—(OC3XF6)d—(OC2F4)e—(OCF2)f—
• and having at least one branched structure,
• wherein a, b, c, d, e, and f are each independently an integer of 0 or more and 200 or less, and the sum of a, b, c, d, e, and f is at least 1, and the occurrence order of the respective repeating units in parentheses with a, b, c, d, e, or f is arbitrary in the formula, and XF is each independently at each occurrence a hydrogen atom, a fluorine atom, or a chlorine atom,
• or
• a group represented by the formula:
• —(R16—R17)j1—
• wherein R16 is OCF2 or OC2F4;
• R17 is a group selected from OC2F4, OC3XF6, OC4F8, OC5F10, and OC6F12, or is a combination of two or three groups independently selected from these groups;
• j1 is an integer of 2 to 100;
• and
• XF is each independently at each occurrence a hydrogen atom, a fluorine atom, or a chlorine atom;
• Rf each independently at each occurrence represents an alkyl group having 1 to 16 carbon atoms which is optionally substituted by one or more fluorine atoms;
• X3 each independently at each occurrence represents —(R31)p′—(Xa)q′—R32—, —X10—CON(R34)—X11—, —X10—(OR35)n4—X11—, or a C1-6 alkylene group;
• R31 represents a single bond, —(CH2)s′— which is optionally substituted by one or more fluorine atoms, or an o-, m-, or p-phenylene group;
• s′ is an integer of 1 to 20;
• Xa is —(Xb)l′—;
• Xb each independently at each occurrence represents a group selected from the group consisting of —O—, —(OR35)n4—, —S—, an o-, m-, or p-phenylene group, —C(O)O—, —Si(R33)2—, (Si(R33)2O)m′—Si(R33)2—, —CON(R34)—, —O—CON(R34)—, —N(R34)—, and —(CH2)n′—;
• R33 each independently at each occurrence represents a phenyl group, a C1-6 alkyl group, or a C1-6 alkoxy group;
• R34 each independently at each occurrence represents a hydrogen atom, a phenyl group, or a C1-6 alkyl group;
• R35 is each independently at each occurrence a C1-6 alkylene group;
• n4 is each independently at each occurrence an integer of 1 to 5;
• m′ is each independently at each occurrence an integer of 1 to 100;
• n′ is each independently at each occurrence an integer of 1 to 20;
• l′ is an integer of 1 to 10;
• p′ is 0 or 1;
• q′ is 0 or 1;
• at least one of p′ and q′ is 1, and the occurrence order of the respective repeating units in parentheses with p′ or q′ is arbitrary in the formula;
• R32 represents a single bond, —(CH2)t′— or an o-, m-, or p-phenylene group;
• t′ is an integer of 1 to 20;
• X10 is a single bond or a divalent organic group;
• X11 is a single bond, an oxygen atom, or a divalent organic group;
• R34 is a hydrogen atom, a phenyl group, or a C1-6 alkyl group;
• R35 is each independently at each occurrence a C1-6 alkylene group;
• n4 is an integer of 1 to 5;
• β and β′ are 1;
• Ra each independently at each occurrence represents —Z3—SiR71p1R72q1R73r1;
• Z3 each independently at each occurrence represents an oxygen atom or a divalent organic group;
• R71 each independently at each occurrence represents Ra′;
• Ra′ is as defined for Ra;
• in Ra, the number of Si atoms which are linearly linked via the Z3 group is up to five;
• R72 each independently at each occurrence represents a hydroxyl group or a hydrolyzable group;
• R73 each independently at each occurrence represents a hydrogen atom or a lower alkyl group;
• p1 is 0;
• q1 is each independently at each occurrence an integer of 1 to 3;
• r1 is each independently at each occurrence an integer of 0 to 2;
• in each (—Z3—SiR71p1R72q1R73r1), the sum of p1, q1, and r1 is 3;
• Rb each independently at each occurrence represents a hydroxyl group or a hydrolyzable group;
• Rc each independently at each occurrence represents a hydrogen atom or a lower alkyl group;
• k1 is 3;
• l1 and m1 are 0;
• X5 is a divalent group represented by the following formula:
• —(R31)p′—(Xa)q′—
• wherein:
• R31 represents a single bond, —(CH2)s′— which is optionally substituted by one or more fluorine atoms, or an o-, m-, or p-phenylene group,
• s′ is an integer of 1 to 20,
• Xa represents —(Xb)l′—,
• Xb each independently at each occurrence represents a group selected from the group consisting of —O—, —(OR35)n4—, —S—, an o-, m-, or p-phenylene group, —C(O)O—, —Si(R33)2—, —(Si(R33)2O)m′—Si(R33)2—, —CON(R34)—, —O—CON(R34)—, —N(R34)—, and —(CH2)n′—,
• R33 each independently at each occurrence represents a phenyl group, a C1-6 alkyl group, or a C1-6 alkoxy group,
• R34 each independently at each occurrence represents a hydrogen atom, a phenyl group, or a C1-6 alkyl group,
• R35 is each independently at each occurrence a C1-6 alkylene group,
• n4 is each independently at each occurrence an integer of 1 to 5,
• m′ is each independently at each occurrence an integer of 1 to 100,
• n′ is each independently at each occurrence an integer of 1 to 20,
• l′ is an integer of 1 to 10,
• p′ is 0 or 1,
• q′ is 0 or 1, and
• at least one of p′ and q′ is 1, and the occurrence order of the respective repeating units in parentheses with p′ or q′ is arbitrary in the formula;
• γ and γ′ are 1;
• Rd each independently at each occurrence represents —Z4—CR81p2R82q2R83r2;
• Z4 each independently at each occurrence represents an oxygen atom or a divalent organic group;
• R81 each independently at each occurrence represents Rd′;
• Rd′ is as defined for Rd;
• in Rd, the number of C atoms which are linearly linked via the Z4 group is up to five;
• R82 each independently at each occurrence represents —Y—SiR85n2R863-n2;
• Y each independently at each occurrence represents a divalent organic group;
• R85 each independently at each occurrence represents a hydroxyl group or a hydrolyzable group;
• R86 each independently at each occurrence represents a hydrogen atom or a lower alkyl group;
• n2 independently represents an integer of 1 to 3 for each (—Y—SiR85n2R863-n2) unit;
• R83 each independently at each occurrence represents a hydrogen atom, a hydroxyl group, or a lower alkyl group;
• p2 is each independently at each occurrence an integer of 0 to 3;
• q2 is each independently at each occurrence an integer of 0 to 3;
• r2 is each independently at each occurrence an integer of 0 to 3;
• in each (—Z4—CR81p2R82q2R83r2), the sum of p2, q2, and r2 is 3;
• Re each independently at each occurrence represents —Y—SiR85n2R863-n2;
• Rf each independently at each occurrence represents a hydrogen atom, a hydroxyl group, or a lower alkyl group;
• k2 is 0;
• l2 is 3;
• m2 is 0;
• and
• in the formulae (C1) and (C2), there is at least one group represented by —Y—SiR85.