Focusing on the middle portion of the above formula, y, G5, G6 are as follows:
G5 represent monovalent moieties which can independently be the same or
different selected from the group consisting of alkyl, aryl, alkaryl, alkoxy,
alkylamino, fluoroalkyl, hydrogen, and -ZSA; A represents a vinyl polymeric
segment consisting essentially of polymerized free radically polymerizable
monomer, and Z is a divalent linking group. Useful divalent linking groups Z
include but are not limited to the following: C1 to C10 alkylene, alkarylene,
arylene, and alkoxyalkylene. Preferably, Z is selected from the group consisting
of methylene and propylene for reasons of commercial availability. (Kumar ‘958,
p. 8, lines 21-34).
G6 represents monovalent moieties which can independently be the same or
different selected from the group consisting of alkyl, aryl, alkaryl, alkoxy,
alkylamino, fluoroalkyl, hydrogen, and -ZSA. . . (Kumar ‘958, p. 8, lines 35-38).
y is an integer of 5 or greater; preferably, y is an integer ranging from about 10
to about 270 in order to provide the silicone segment with a molecular weight
ranging from about 750 to about 20,000. Most preferably, y is an integer
ranging from about 40 to about 270 . . . (Kumar ‘958, p. 10, lines 10-15
emphasis added).
Additionally, the Kumar ‘958 application states that preferred polymers of the invention
include the reaction product of 35 to 95 weight percent “hard” monomers, 0 to 25 weight percent
“soft” monomers, and 5 to 40 weight percent mercapto-functional silicone compounds of the
following formula (B):
wherein the mole ratio of m/n is 9-49; and
Y is selected from C1-10 alkylene and alkarylene having at least 10 carbons, wherein the
bracketed groups may be randomly distributed throughout the compound, said compound
having a total number average molecular weight of 350-20,000.
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Last modified: November 3, 2007