Patent ID: 8017697

Claim:
A method of preparing a thermoplastic composition, comprising: oxidatively copolymerizing a monohydric phenol and a hydroxyaryl-terminated polysiloxane to form a thermoplastic composition; wherein the oxidative copolymerization is initiated in the presence of at least 50 weight percent of the hydroxyaryl-terminated polysiloxane and less than or equal to 50 weight percent of the monohydric phenol; wherein the oxidative copolymerization is conducted with a reaction time greater than or equal to 110 minutes; wherein the hydroxyaryl-terminated polysiloxane comprises, on average, 35 to 80 siloxane repeating units; wherein the hydroxyaryl-terminated polysiloxane constitutes 1 to 8 weight percent of the combined weight of the monohydric phenol and the hydroxyaryl-terminated polysiloxane; and wherein the thermoplastic composition incorporates greater than 80 weight percent of the hydroxyaryl-terminated polysiloxane into the poly(arylene ether)-polysiloxane block copolymer.