| 摘要 |
A method to produce a rigid polyurethane foam includes emulsifying a nucleating agent by mixing the nucleating agent with a polyol and a foam stabilizer, preparing a polyol mixture by mixing water, a catalyst, and a blowing agent at one of: before the emulsifying, during the emulsifying and after the emulsifying, and reacting the polyol mixture with a polyisocyanate.
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