CPC C08G 77/385 (2013.01) [C08G 77/08 (2013.01); C09D 183/08 (2013.01); C07F 7/081 (2013.01); C07F 7/0836 (2013.01)] | 17 Claims |
1. A poly(fluoroalkyl-functional siloxane) oligomer having the general formula (I):
T1aT2bT3c (I)
wherein
T1 is independently RF-Q-SiX2O1/2;
T2 is independently RF-Q-SiXO2/2;
T3 is independently RF-Q-SiO3/2;
each RF is independently CnF(2n+1) group where n is from 1 to 16;
each Q is independently a divalent linear or branched alkylene group containing from 1 to 6 carbon atoms or a divalent linear or branched alkylene group containing from 1 to 6 carbon atoms and an oxygen atom to form an ether group or an oxo group and amino group to form an amidoalkylene group;
each X is independently a hydroxy group or a hydrolyzable group; and
where the oligomer of formula (I) is selected from:
(a) a branched poly(fluoroalkyl-functional siloxane) oligomer wherein a is equal to 2+c, b is form 1 to 10, and c is from 1 to 10;
(b) a monocyclic poly(fluoroalkyl-functional siloxane) oligomer wherein a is an integer from 1 to 10, b is an integer from 1 to 10, and c is equal to a; or
(c) a polycyclic poly(fluoroalkyl-functional siloxane) oligomer of the formula (IV):
wherein
each RF is CnF(2n+1) group where n is from 1 to 16;
Q in formula (IV) is a divalent linear or branched alkylene group containing from 1 to 6 carbon atoms;
X in formula (IV) is independently a hydroxy group or an alkoxy group containing 1 to 6 carbon atoms; and
j is an integer from 1 to 5, k is an integer from 0 to 5, and l is an integer from 0 to 5, with the proviso that the sum of j+k+l is from 2 to 10;
with the provisos that
(i) a half oxygen atom bonded to one silicon atom in a T1, T2, or T3 unit is paired with a half oxygen atom bonded to a different silicon atom in a T1, T2, or T3 unit to form a Si—O—Si bond; and
(ii) the sum of a+b+c is from 5 to 32.
|