Surface treatment composition and process
AssigneeE. I. Du Pont de Nemours and Company
InventorsDidier Juhue, Maria Jose Lina, Anne Claire Gayon, Jean-Marc Corpart
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Abstract
The invention relates to a composition comprising a compound having formula (I): Rf—B—Ro-Z and a compound having formula (II) and/or the reaction product thereof. The invention is suitable for treating surfaces, in particular, transparent substrates. 1
Claims22
1) A composition comprising a compound of formula (I):
- RfB—Ro-Z (I)
- in which:
- Rf represents a perfluorinated alkyl radical with a straight or branched chain comprising 1 to 20 carbon atoms;
- B represents a bivalent group which may comprise 1 to 3 atoms of oxygen, sulfur and/or nitrogen;
- Ro represents 1 to 100, preferably 5 to 20 oxyalkylene groups connected to the group B via a carbon atom;
- and
- Z is a hydrogen atom or, when b carries a hydroxyl group, a linear or branched chain alkyl group comprising 1 to 6 carbon atoms;
- and a compound of formula (II):
- 7
- in which:
- m is a whole number from 0 to 10;
- R represents, each independently from the other, a linear or branched alkyl group comprising 1 to 6 carbon atoms;
- p is a whole number from 0 to 2;
- A represents, each independently from the other, a halogen, or an alkoxy group comprising 1 to 6 carbon atoms;
- and
- Y represents a group comprising an isocyanate, epoxy, carboxylic acid or alcohol function, Y can also represent Si(Rp)(A)3-p when m is different from zero, and a group A when m is equal to zero;
- and/or their reaction product.
2) Composition according to the preceding claim, in which Rf in formula (I) comprises 6 to 16 carbon atoms.
3) Composition according to the preceding claims, in which Ro in formula (I) represents 5 to 20 oxyalkylene groups, preferably oxyethylene or oxypropylene groups.
4) Composition according to the preceding claims, in which m in formula (II) is a number from 0 to 3.
5) Composition according to the preceding claims, in which Y in formula (II) comprises an isocyanate or epoxy function.
6) Composition according to the preceding claims, in which A in formula (II) represents a methoxy, ethoxy, propyloxy, and/or isopropyloxy group.
7) Composition according to the preceding claims, in which p is 0.
8) Composition according to the preceding claims, comprising 1 to 50%, and in particular 10 to 40% by weight of the compounds of formula (I) and (II) and/or of their reaction product.
9) Composition according to the preceding claims, comprising in addition a solvent chosen among water, the alcohols and their mixtures.
10) Composition according to the preceding claim comprising 0.05 to 5%, in particular 0.1 to 2% by weight of active material.
11) Composition according to the preceding claims in the form of an aqueous emulsion.
12) Process for preparing a composition according to any of the preceding claims comprising the step of:
- (a) dissolving a compound for formula (I) and a compound of formula (II) in an appropriate anhydrous solvent.
13) Process according to the preceding claim, comprising the following additional step
- (b) addition of a solvent chosen among water, the alcohols or their mixtures.
14) Process according to the preceding claim, comprising the following additional steps:
- (c) emulsification of the solution obtained in step (b), if necessary in the presence of a surface active agent or a water soluble polymer;
- and if necessary,
- (d) separation of the anhydrous solvent.
15) Compound of formula (III)
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- in which Rf, B, Ro, m, A and p are as defined above and Q is a carbamate, ester, alkoxysilane or ether function.
16) Compound according to the preceding claim in which Q is a carbamate or ether function.
17) Process for preparing a compound of formula (III) by reaction of the alcohol function in a compound of formula (I) with the group Y in a the compound of formula (II), if necessary in the presence of a catalyst.
19) Process according to the preceding claim which comprises an additional step of:
- (ii) thermal treatment of the substrate obtained in step (i) at a temperature comprised between 50 and 200° C. for a period of time comprised between 1 second and 24 hours.
Dependencies are inferred from the claim text.