发明授权
US5182311A Blowing agent-containing polymeric MDI compositions 失效
含发泡剂的聚合MDI组合物

Blowing agent-containing polymeric MDI compositions
摘要:
Mixtures of medium viscosity polymeric MDI and HCFC-22 have unexpectedly low vapor pressure, rendering such mixtures suitable for the preparation of polyurethane and polyisocyanate foams.
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