Constant boiling ternary compositions and the process for using such compositions in the preparation of polyurethane foam

摘要

Constant boiling and essentially constant boiling compositions comprising from about 99 - 72 weight percent trichlorofluoromethane, from about 0.5 - 15 weight percent isopentane and from about 0.5 - 13 weight percent methylene chloride are novel compositions which are particularly useful as blowing agents in the preparation of polyurethane foams.