| http://www.w3.org/ns/prov#value | - Preferred R6 groups include such groups as alkylene and hydroxy alkylene disubstituted bisphenol-A or bisphenol-F ethers, especially the brominated forms of bisphenol-A and -F. Suitable R6 groups include those according to the formula (III) wherein Q is ???C(CH3)2???, ???CH2???, ???C(O)???, ???S(O)???, or ???S(O)2???; Y is C1-C6 alkyl or hydroxy substituted C1-C6 alkyl; i is 1 to 10; t is 0, 1, 2,
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