Patent ID: 8519080
Filing Date: 2013-08-27
Classification: C08F,C08G,C09D,G03F

Abstract:
1. A crosslinkable prepolymer comprising a polyaryl ether structure on a main chain thereof, wherein the crosslinkable prepolymer further comprises a crosslinkable functional group and a side chain represented by formula (I): where R f is a C 3-50 fluorinated alkyl group that may comprise an oxygen atom forming an ether bond, the main chain has a halogen-substituted aromatic ring having some or all of hydrogen atoms bonded to an aromatic ring substituted by halogen atoms, the side chain represented by the formula (I) is bonded to the halogen-substituted aromatic ring, the crosslinkable prepolymer is obtained by reacting a precursor (P21) with an alcohol (Q) in a presence of a hydrogen fluoride scavenger, the precursor (P21) is obtained by performing a condensation reaction in a presence of a hydrogen fluoride scavenger, the condensation reaction comprises a reaction of at least one of a compound (Y-1) and a compound (Y-2), a fluorinated aromatic compound (B), and a compound (C), the compound (Y-1) has a crosslinkable functional group and a phenolic hydroxyl group, the compound (Y-2) has a crosslinkable functional group and an aromatic ring substituted by fluorine atoms reactive with a phenolic hydroxyl group, the fluorinated aromatic compound (B) is represented by formula (1): where n is an integer of from 0 to 2, each of a and b which are independent of each other is an integer of from 0 to 3, each of Rf 1 and Rf 2 which are independent of each other is a fluorinated alkyl group having at most 8 carbon atoms, provided that when multiple Rf 1 and Rf 2 are present, they may be the same or different, and F in the aromatic ring represents that hydrogen atoms bonded to the aromatic ring are all substituted by fluorine atoms, the compound (C) has at least 3 phenolic hydroxyl groups, the alcohol (Q) is represented by formula (II): where R f is a C 3-50 fluorinated alkyl group which may comprise an oxygen atom forming an ether bond, and the crosslinkable functional group is included in an amount of from 0.1 to 4 mmol per gram of the crosslinkable prepolymer.