Patent ID: 6733698
Filing Date: 2004-05-11
Classification: B32B,C07F,C08G,H05K,Y10T

Abstract:
A mixture of hydroxyarylphosphine oxides comprising:(a) a mono(hydroxyaryl)phosphine oxide of the formula: â€ƒwherein R1 is a divalent, substituted or unsubstituted arylene moiety and R2 is a monovalent, substituted or unsubstituted aryl moiety or is an alkyl moiety or is an aralkyl moiety; and (b) a bis(hydroxyaryl)phosphine oxide of the formula: â€ƒwherein R1 and R2 are defined as above; and (c) a tris(hydroxyaryl)phosphine oxide of the formula: â€ƒwherein R1 is defined as above; and (d) optionally containing minor amounts of a pentavalent phosphine oxide of the formula: â€ƒwherein R2 is defined as above.