申请人:Asahi Glass Company, Limited
公开号:EP1897897A1
公开(公告)日:2008-03-12
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 Rf1 and Rf2 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 1×103 to 5×105.
提供一种可交联的含氟芳香族预聚物,它能够形成具有高透明度、低相对介电常数、高耐热性、低双折射和高柔韧性的固化产品及其用途。
一种可交联的含氟芳香族预聚物,它是将具有可聚合双键(A)和/或酚羟基的化合物 (Y-1)和具有可聚合双键(A)和含氟芳香环的化合物(Y-2)与下式(1)表示的含氟芳香族化合物 (B)在氢氟酸去除剂存在下进行缩合反应而得到的:
(其中 n 为 0 至 3 的整数,a 和 b 互不相关,均为 0 至 3 的整数,Rf1 和 Rf2 均为最多具有 8 个碳原子的氟化烷基),以及至少具有 3 个酚羟基的化合物(C),各酚羟基不存在于同一芳香环中,该化合物具有可聚合双键(A)和醚键,平均分子量为 1×103 至 5×105。