Easy to clean coating

Patent metadata

Field	Value
Publication number	US-2022010170-A1
Application number	US-201917293665-A
Country	US
Kind code	A1
Filing date	Nov 11, 2019
Priority date	Nov 13, 2018
Publication date	Jan 13, 2022
Grant date	—

Abstract

The present invention relates to a process for preparing a thin film on a substrate in which a first precursor composition (FPC) and a second precursor composition (SPC) are combined, a thin layer of the combined first precursor composition (FPC) and second precursor composition (SPC) is formed on a substrate and the thin layer is cured, an article comprising said thin layer, a composition comprising said first precursor composition (FPC) and said second precursor composition (SPC), a kit-of-parts comprising said first precursor composition (FPC) and said second precursor composition (SPC) in two vessels and the use of said composition or kit-of-parts for preparing a thin film on a substrate and for preparing an optical or electrical coating.

First claim

1 .- 16 . (canceled)

17 . Process for preparing a thin film on a substrate, the process comprising the steps of
a) preparing a first precursor composition (FPC) in a first vessel, the preparation comprising the following steps:
a1) providing one or more metal or metalloid compound(s) according to the following formula (I)
M 1 (OR 1 ) n R 2 m   (I)

 wherein  M 1 is a metal or metalloid with a valence z  R 1 is each independently selected from a C 1 to C 10 organyl or organoheteryl group;  R 2 is each independently selected from a C 1 to C 20 organyl, organoheteryl, fluorinated organyl or fluorinated organoheteryl group  n is 1 to z  m is z−1 to 0  n+m is z
a2) at least partial hydrolysation of the M 1 (OR 1 )-moieties and polymerizing the one or more metal or metalloid compound according to formula (I);
b) preparing a second precursor composition (SPC) in a second vessel, the preparation comprising the following steps:
b1) providing a fluoropolyether silane comprising hydrolysable groups (PFS);
c) combining the first precursor composition (FPC) with the second precursor composition (SPC); d) forming a thin layer on the substrate; e) optionally partially or completely removing solvent, if present, after step d); f) curing the intermediate product obtained in step e), if present, or step d), if step e) is not present thereby obtaining a thin film.

18 . The process according to claim 17 , wherein the one or more metal or metalloid compound(s) according to formula (I) is/are free from fluorine.

19 . The process according to claim 17 , wherein one or more of the one or more metal or metalloid compound(s) according to formula (I) comprise at least one fluorine atom in the R 2 residue of formula (I).

20 . The process according to claim 17 , wherein the thickness of the thin film after step f) is 15.0 to 120 nm.

21 . The process according to claim 17 , wherein, in case solvents are present, the amount of fluorine-containing solvents based on the total weight of the solvents present is equal or less than 75 wt. %.

22 . The process according to claim 17 , wherein in step c) the weight ratio between the solids contents of the first precursor composition (FPC) and the solids content of the second precursor composition (SPC) is between 100:1.0 to 0.5:1.0.

23 . The process according to claim 17 , wherein M 1 is selected from Si, Ge, Sb, Ti, Zr, Al, Sn, W, Se, Cr, Ag or Ni.

24 . The process according to claim 17 , wherein step d) is effected by dip coating, slot coating, combined slot+spin coating, spin coating, spray coating, ink-jet printing, curtain coating, roller coating, roll-to-roll coating, screen printing or using a bar, a brush or by rubbing.

25 . The process according to claim 17 , wherein the fluoropolyether silane comprising hydrolysable groups (PFS) is selected from compounds according to the following formula (III)
R 5 —R F -Q-Si(OR 3 ) o R 4 p   (III)
wherein R F is a fluoropolyether group; Q is a divalent linking group; R 3 is each independently selected from a C 1 to C 10 organyl or organoheteryl group; R 4 is each independently selected from a C 1 to C 20 organyl or organoheteryl group o is 1, 2 or 3 p is 0, 1 or 2 o+p is 3 R 5 is H, C x F 2x+1 with x being 1 to 10 or -Q-Si(OR 3 ) o R 4 p , with Q, R 3 , R 4 , o and p as defined above, whereby in each occurrence Q, R 3 , R 4 , o and p being present may be the same or different.

26 . The process according to claim 17 , wherein in step a2) a compound according to the following formula (II) is present
R 7′ t′ (OR 6′ ) s′ M 2− Y-M 2′ (OR 6 ) s R 7 t   (II)
wherein M 2 , M 2′ are the same or different and are each independently selected from a metal or metalloid with a valence x; Y is a divalent linking group; R 6 , R 6′ are the same or different and are each independently selected from a C 1 to C 10 organyl or organoheteryl group; R 7 , R 7′ are the same or different and are each independently selected from a C 1 to C 20 organyl or organoheteryl group; s, s′ are the same or different and are each independently selected from 1 to x−1; t, t′ are the same or different and are each independently selected from is x−2 to 0; s+t is x−1; and s′+t′ is x−1.

27 . An article comprising the thin film obtainable by the process according to claim 17 .

28 . The article of claim 27 , being an optically or electrically coated article.

29 . A composition comprising a first precursor composition (FPC) and a second precursor composition (SPC), the first precursor composition (FPC) being a polymerized metal or metalloid compound according to formula (I)
M 1 (OR 1 ) n R 2 m   (I)
wherein M 1 is a metal or metalloid with a valence z R 1 is each independently selected from a C 1 to C 10 organyl or organoheteryl group; R 2 is each independently selected from a C 1 to C 20 organyl, organoheteryl, fluorinated organyl or fluorinated organoheteryl group n is 1 to z−1 m is 1 to z−1 n+m is z whereby the polymerization is effected by at least partial hydrolysation of the M 1 (OR 1 )-moieties; the second precursor composition (SPC) being obtainable by
b1) providing a fluoropolyether silane comprising hydrolysable groups (PFS).

30 . A kit-of-parts comprising a first precursor composition (FPC) in a first vessel and a second precursor composition (SPC) in a second vessel, the first precursor composition (FPC) being a polymerized metal or metalloid compound according to formula (I)
M 1 (OR 1 ) n R 2 m   (I)
wherein M 1 is a metal or metalloid with a valence z R 1 is each independently selected from a C 1 to C 10 organyl, organoheteryl, fluorinated organyl or fluorinated organoheteryl group; R 2 is each independently selected from a C 1 to C 20 organyl or organoheteryl group n is 1 to z−1 m is 1 to z−1 n+m is z whereby the polymerization is effected by at least partial hydrolysation of the M 1 (OR 1 )-moieties; the second precursor composition (SPC) being obtainable by
b1) providing a fluoropolyether silane comprising hydrolysable groups (PFS).

31 . Use of the composition according to claim 29 or the kit-of-parts according to claim 30 for preparing a thin film on a substrate.

32 . Use of the composition according to claim 29 or the kit-of-parts according to claim 30 for preparing an optical or electrical coating.

Assignees

• Basf Se

Inventors

• Zhou Mi
• Pschirer Neil Gregory
• Tang Hsin Tsao
• Chen Ying Jung
• Pirinen Sami
• Karkkainen Ari
• Hannu-Kuure Milja
• Maekimartti Oskari

Classifications

• B05D2203/35

  Glass · CPC title

• C08G65/336

  containing silicon · CPC title

• C09D5/00

  Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced {(electrically insulating plastics, resins or waxes H01B3/30)}; Filling pastes · CPC title

• B05D3/065

  After-treatment · CPC title

• B05D5/00 Primary

  Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures · CPC title