Patent ID: 6235865
Filing Date: 2001-05-22
Classification: B01J,C07F,C08G,C08K

Abstract:
A phosphonium borate compound of the following general formula (1): ##STR22##wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4, which may be the same or different, each are a monovalent organic group having an aromatic ring or a monovalent aliphatic group, at least one of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 which are bonded to phosphorus atom and at least one of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 which are bonded to boron atom are each an organic group derived by releasing a proton from a proton donor selected from the group consisting of an aromatic carboxylic acid having at least one carboxyl group in a molecule, an aromatic carboxylic acid having at least one acid anhydride group and at least one carboxyl group in a molecule, a phenol compound having at least one phenolic hydroxyl group in a molecule, an aromatic compound having at least one carboxyl group and at least one phenolic hydroxyl group in a molecule, and an aliphatic carboxylic acid having at least one carboxyl group in a molecule.