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    • 4. 发明授权
    • Water based mold release compositions for making molded polyurethane foam
    • 用于制造模塑聚氨酯泡沫的水基脱模组合物
    • US5028366A
    • 1991-07-02
    • US142970
    • 1988-01-12
    • Mark E. HarakalGeorge J. WasilczykGary D. AndrewZdizslaw MakusMichael Scarpati
    • Mark E. HarakalGeorge J. WasilczykGary D. AndrewZdizslaw MakusMichael Scarpati
    • B29C33/60
    • B29C33/60
    • A method for preparing a polyurethane foam article in a mold by applying to a mold surface a water-based mold release composition which includes a release effective system which is in a solid (hardened) state at the mold pour temperature and a liquid state at the demold temperature, pouring a polyurethane foam composition into the mold, curing the foam composition and demolding the foam article. The use of such release effective system in the aqueous mold release composition provides for a reduction in surface defects of the polyurethane foam article.Also disclosed is the incorporation of a poly(siloxane-glycol) surfactant having a cloud point ranging from 25.degree.-50.degree. C. into a water-based mold release composition including an aqueous emulsion or dispersion of at least one release effective substance and desirably at least one emulsifying agent provides for improved surface quality of the foam product.
    • 一种通过向模具表面施加水性脱模组合物来制备聚氨酯泡沫塑料制品的方法,所述水性脱模组合物包括在模具浇注温度处于固体(硬化)状态的释放有效系统和在 脱模温度,将聚氨酯泡沫组合物倒入模具中,固化泡沫组合物并脱模泡沫制品。 在水性脱模组合物中使用这种释放有效系统提供了聚氨酯泡沫制品的表面缺陷的减少。 还公开了将具有25℃-50℃的浊点的聚(硅氧烷 - 二醇)表面活性剂掺入包含至少一种释放有效物质的水性乳液或分散体的水性脱模组合物中, 至少一种乳化剂提供改善泡沫产品的表面质量。