Antifouling composition, treatment device, treatment method, and treated article

A surface-treating agent for treating a glass base material having a Si—H bond on a surface of the glass base material, comprising a fluorine-containing compound having a carbon-carbon unsaturated bond at its molecular terminal and a fluorine-containing oil which is one or more compounds of the formula (3):

• Rf1—(OC4F8)a′—(OC3F6)b′—(OC2F4)c′—(OCF2)d′—RF2 (3)
• wherein:
• Rf1 is an alkyl group having 1-16 carbon atoms which may be substituted by one or more fluorine atoms;
• Rf2 is an alkyl group having 1-16 carbon atoms which may be substituted by one or more fluorine atoms, a fluorine atom or a hydrogen atom;
• a′, b′, c′ and d′ are the repeating number of each of four repeating units of perfluoro(poly)ether which constitute a main backbone of the polymer, and are each independently an integer of 0 or more and 300 or less, the sum of a′, b′, c′ and d′ is 1 or more, and the occurrence order of the respective repeating units in parentheses with the subscript a′, b′, c′ and d′ is not limited in the formula,
• wherein the fluorine-containing compound having a carbon-carbon unsaturated bond at its molecular terminal is at least one compound of any of the following formulae (A1), (A2), (B2), (C1), (C2), (D1) and (D2):
• wherein:
• A is each independently at each occurrence —CH═CH2 or —C≡CH;
• Y is a single bond;
• Rf is each independently an alkyl group having 1-16 carbon atoms which may be substituted by one or more fluorine atoms;
• PFPE is each independently —(OC4F8)a—(OC3F6)b—(OC2F4)c—(OCF2)d—, wherein a, b, c and d are each independently an integer of 0 or more and 200 or less, the sum of a, b, c and d is 1 or more, and the occurrence order of the respective repeating units in parentheses with the subscript a, b, c or d is not limited in the formula;
• R11 is each independently a hydrogen atom or a halogen atom;
• R12 is each independently at each occurrence a hydrogen atom or a lower alkyl group;
• X1 is each independently a single bond or a 2-10 valent organic group;
• X2 is each independently at each occurrence a single bond or a divalent organic group;
• t is each independently an integer of 1-10;
• α is each independently an integer of 1-9;
• α′ is each independently an integer of 1-9;
• X3 is each independently selected from the group consisting of:
• —(CH2)2—Si(CH3)2—(CH2)2—
• —CONH—(CH2)3—,
• —CON(CH3)—(CH2)3—,
• —CON(Ph)-(CH2)3— (wherein Ph is a phenyl group),
• —CONH—(CH2)6—,
• —CON(CH3)—(CH2)6—,
• —CON(Ph)-(CH2)6— (wherein Ph is a phenyl group),
• —CONH—(CH2)2NH(CH2)3—,
• —CONH—(CH2)6NH(CH2)3—,
• —CH2O—CONH—(CH2)3—,
• —CH2O—CONH—(CH2)6—,
• —S—(CH2)3—,
• —(CH2)2S(CH2)3—,
• —C(O)O—(CH2)3—,
• —C(O)O—(CH2)6—,
• —CH2—O—(CH2)3—Si(CH3)2—(CH2)2—Si(CH3)2—(CH2)2—,
• —CH2—O—(CH2)3—Si(CH3)2—(CH2)2—Si(CH3)2—CH(CH3)—,
• —CH2—O—(CH2)3—Si(CH3)2—(CH2)2—Si(CH3)2—(CH2)3—,
• —CH2—O—(CH2)3—Si(CH3)2—(CH2)2—Si(CH3)2—CH(CH3)—CH2—,
• β is 1;
• X4 is each independently a single bond or a 2-10 valent organic group;
• γ is each independently an integer of 1-9;
• γ′ is each independently an integer of 1-9;
• Ra is each independently at each occurrence —Z—SiR71pR72qR73rR74s;
• Z is each independently at each occurrence an oxygen atom or a divalent organic group;
• R71 is each independently at each occurrence Ra′;
• Ra′ has the same definition as that of Ra;
• in Ra, the number of Si atoms which are straightly linked via the Z group is up to five;
• R72 is each independently at each occurrence —X5—Y-A;
• X5 is each independently at each occurrence a single bond or a divalent organic group;
• R73 is each independently at each occurrence a hydroxyl group or a hydrolyzable group;
• R74 is each independently at each occurrence a hydrogen atom or a lower alkyl group;
• p is each independently at each occurrence an integer of 0-3;
• q is each independently at each occurrence an integer of 0-3;
• r is each independently at each occurrence an integer of 0-3;
• s is each independently at each occurrence an integer of 0-3;
• with the proviso that (p+q+r+s) is 3;
• Rb is each independently at each occurrence —X5—Y-A;
• Rc is each independently at each occurrence a hydroxyl group or a hydrolyzable group;
• Rd is each independently at each occurrence a hydrogen atom or a lower alkyl group;
• k is each independently at each occurrence an integer of 0-3;
• l is each independently at each occurrence an integer of 0-3;
• m is each independently at each occurrence an integer of 0-3;
• n is each independently at each occurrence an integer of 0-3;
• with the proviso that (k+l+m+n) is 3, and there is at least one the Y-A group in —(SiRakRblRcmRdn)r;
• X6 is each independently a single bond or a 2-10 valent organic group;
• δ is each independently an integer of 1-9;
• δ′ is each independently an integer of 1-9;
• R91 is a fluorine atom, —CHF2 or —CF3;
• and
• Rf′ is a perfluoroalkylene group having 1-20 carbon atoms, and
• the fluorine-containing compound can bind to the glass base material by a Si—C bond.