Patent ID: 6340734
Filing Date: 2002-01-22
Classification: G03F,Y10S

Abstract:
A method of synthesizing a silsesquioxane polymer, said method comprising the steps of:a) forming a functionalized phenylalkyl silicon-containing compound, wherein: i) the functionalized phenylalkyl compound possesses a protected hydroxyl moiety and a trihydroxysilane containing moiety on the alkyl moiety; ii) the alkyl moiety comprises a branched C2-alkyl group; and iii) the protected hydroxyl moiety is selected from the group consisting of R5â€”COOâ€”, R6â€”Oâ€”, R6â€”Oâ€”COOâ€”, and other protected moieties that may be selectively converted to form hydroxyphenylalkyl, wherein R5 is selected from the group consisting of H, alkyl, aryl, and combinations thereof and R6 is selected from the group consisting of alkyl, aryl, silyl, and combinations thereof; b) polymerizing the resulting functionalized phenylalkyl compound to form a silsesquioxane polymer having functional groups; and c) hydrolyzing at least a portion of said functional groups of the silsesquioxane polymer of step (b) to produce a silsesquioxane polymer that is aqueous base soluble.