| 摘要 |
To provide a crosslinkable fluorinated aromatic prepolymer which is capable of forming a cured product having high transparency, a low relative permittivity, high heat resistance, low birefringence and high flexibility, and its uses. A crosslinkable fluorinated aromatic prepolymer which is obtained by subjecting a compound (Y-1) having a polymerizable double bond (A) and/or a phenolic hydroxyl group and a compound (Y-2) having a polymerizable double bond (A) and a fluorinated aromatic ring, to a condensation reaction in the presence of a HF-removing agent, with a fluorinated aromatic compound (B) represented by the following formula (1): (wherein n is an integer of from 0 to 3, each of a and b which are independent of each other, is an integer of from 0 to 3, and each of Rf<SUP>1 </SUP>and Rf<SUP>2 </SUP>is a fluorinated alkyl group having at most 8 carbon atoms), and a compound (C) having at least 3 phenolic hydroxyl groups, the respective phenolic hydroxyl groups not being present in the same aromatic ring, and which has polymerizable double bonds (A) and ether bonds and has a number average molecular weight of from 1x10<SUP>3 </SUP>to 5x10<SUP>5</SUP>.
|
