REMOVAL OF UNREACTED DIISOCYANATE MONOMER FROM POLYURETHANE PREPOLYMERS
摘要
A process for reducing the amount of residual organic diisocyanate monomer in a polyurethane prepolymer reaction product mixture which comprises distilling the polyurethane prepolymer reaction product mixture in the presence of a combination of at least one inert first solvent with a boiling point below the boiling point of the residual organic diisocyanate monomer and at least one inert second solvent with a boiling point above the boiling point of the residual organic diisocyanate monomer, at a temperature which exceeds the vaporization temperature of the residual organic diisocyanate monomer and which is below the decomposition temperature of the polyurethane prepolymer.
申请公布号
WO9746603(A1)
申请公布日期
1997.12.11
申请号
WO1997US07909
申请日期
1997.05.09
申请人
UNIROYAL CHEMICAL COMPANY, INC.
发明人
ROSENBERG, RONALD, OWEN;SINGH, AJAIB;MAUPIN, CHRISTOPHER, JAMES;LOMBARDO, BRIAN, SCOTT