Fluoroalkyl silanes are a class of compounds useful for various industrial purposes. For example, fluoroalkyl silanes which have hydrolysable groups (called hydrolysable fluoroalkyl silanes), are compounds useful as surface treatment agents which provide durable hydrophobic and oleophobic coatings. In general, hydrolysable fluoroalkyl silanes can be represented with the following formula: (RO—)
3
Si—R
T
wherein R is H or an alkyl; and R
T
is a monovalent organic compound terminated by a perfluoroalkyl group. When used to coat a surface, the (RO—)
3
moiety reacts (via hydrolysis) with various chemical groups of the surface (e.g., hydroxyl, amine, or other reactive groups) thereby bonding the fluoroalkyl silane to the surface The R
T
moiety comprises a divalent organic linking group which links the silicon atom to a terminal group rich in fluorine atoms whose unique electronic properties impart desirable hydrophobic and oleophobic properties in a surface coating. Modification of the R
T
moiety is useful in the engineering of fluoroalkyl silanes. The present invention provides for fluoroalkyl silanes having R
T
moieties which have not been heretofore considered.
The present invention is directed to a fluorosilane represented by (L)
3
-Si—(CH
2
)
n
—(Z
1
)
a
—[C(X
1
)]
x
—(Z
2
)
l
-Q
1
-R
f
where each n is independently an integer from 1 to 12; L is independently chosen from a hydrolysable or non-hydrolysable monovalent group; R
f
is chosen from a C
2
-C
12
perfluoroalkyl provided that: i) one fluorine atom of the perfluoroalkyl can be optionally replaced by hydrogen, and/or ii) the perfluoroalkyl can be optionally interrupted by at least one oxygen, methylene, or ethylene; Q
1
is chosen from the group consisting of a C
2
-C
12
hydrocarbylene optionally interrupted by at least one divalent organic group; X
1
is chosen from O or S; —Z
2
is —NH— and Z
1
is from the group consisting of —O—, and —S—; each R
1
is independently chosen from hydrogen, phenyl, or a monovalent C
1
-C
8
alkyl optionally terminated by —C
6
H
5
, preferably H or CH
3
.
A fluoropolymer composition comprising monomers copolymerized in the following percentages by weight:
(a) from about 20% to about 95% of a fluoroalkyl monomer, or mixture of monomers,
(b) from about 5% to about 80% of at least one of:
(i) an alkyl (meth)acrylate monomer having a linear, branched or cyclic alkyl group of from about 6 to about 18 carbons; or
(ii) one or more ionizable water solvatable monomers; and
(c) from about 0.05% to about 2% non-fluorinated polymerizable nanoparticles.
A composition comprising a polymer prepared by: reacting (a) at least one diisocyanate, polyisocyanate, or mixture thereof, having isocyanate groups, and (b) at least one fluorinated compound selected from the formula (I):
R
f
1
-L-X (I)
wherein
R
f
1
is a monovalent, partially or fully fluorinated, linear or branched, alkyl radical having 2 to 100 carbon atoms; optionally interrupted by 1 to 50 oxygen atoms; wherein the ratio of carbon atoms to oxygen atoms is at least 2:1 and no oxygen atoms are bonded to each other;
L is a bond or a linear or branched divalent linking group having 1 15 to 20 carbon atoms, said linking group optionally interrupted by 1 to 4 hetero-radicals selected from the group consisting or —O—, —NR—, —S—, —SO—, —SO
2
—, —N(R)C(O)— wherein R is H or C
1
-C
6
alkyl, and said linking group optionally substituted with CH
2
Cl;
X is an isocyanate-reactive group selected from the group consisting of —OH, —N(R)H, and —SH wherein R is H or C
1
-C
6
alkyl;
and thereafter reacting with (c) water and (d) an isocyanate-reactive non-fluorinated particulate component.