Patent ID: 6881811
Filing Date: 2005-04-19
Classification: C08G,H01L,H05K

Abstract:
1. A fluorinated aromatic polymer which contains two or more crosslinkable functional groups (A) per molecule and has a number average molecular weight of from 1×10 3 to 5×10 5 and an ether linkage and which is produced from a branched fluorinated aromatic compound (B) represented by the following formula 1 by at least one method selected from the group consisting of the following methods {circle around (1)}, {circle around (2)} and {circle around (3)}: wherein each of m and n which are independent of each other, is an integer of from 1 to 4, each of p, q and r which are independent of one another, is 0 or an integer of from 1 to 5, and each of a, b and c which are independent of one another, is 0 or an integer of from 1 to 3, provided that 2≦m+n≦5; {circle around (1)} a method in which a branched fluorinated aromatic compound (B) represented by the above formula 1 and a compound (Y1) having a crosslinkable functional group (A) and at least one phenolic hydroxyl group, are subjected to a condensation reaction in the presence of a HF-removing agent; {circle around (2)} a method in which the fluorinated aromatic compound (B), a compound (Y1) having a crosslinkable functional group (A) and at least one phenolic hydroxyl group, and a compound (Y2) having no crosslinkable functional group and two or more phenolic hydroxyl groups, are subjected to a condensation reaction in the presence of a HF-removing agent; {circle around (3)} a method in which the fluorinated aromatic compound (B), an aromatic compound (Z) having a crosslinkable functional group (A) and having a fluorinated substituent on the aromatic ring, and a compound (Y2) having no crosslinkable functional group and two or more phenolic hydroxyl groups, are subjected to a condensation reaction in the presence of a HF-removing agent.