| 摘要 |
It has been found that non-chlorinated pentafluoropropane blowing agents may be used alone or in combination with water in a method of making flexible integral skin foams. For example, foams prepared using 1,1,1,3,3-pentafluoropropane (HFA-245fa ) alone or in combination with water exhibit physical characteristics such as resi stance to abrasion and cracking on flex comparable to conventional chlorinated fluorocarbo n blown foams. The method of the the present invention produce foams which are suitable for use in many applications including, for example, shoe soles.
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