首页>
外国专利>
Method for producing low compression strain and high air flow rate MDI viscoelastic polyurethane foam
Method for producing low compression strain and high air flow rate MDI viscoelastic polyurethane foam
展开▼
机译:低压缩应变,高空气流量的mdi粘弹性聚氨酯泡沫的生产方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
A reaction system comprising an organic polyisocyanate and an isocyanate reactive component for preparation of a viscoelastic polyurethane foam is provided. The isocyanate reactive component comprises (i) from 10 to 50% by weight of one or more low equivalent weight propylene oxide rich (PO-rich) polyols having a combined number average equivalent weight from 200 to 500, (ii) from 45 to 95% by weight of one or more ethylene oxide (EO-rich) polyols having a combined number average equivalent weight from 200 to 800 and an ethylene oxide content from 40% to 65% by weight of the total mass of the EO-rich polyol and at least one of (iii) from 10 to 30% by weight of one or more high equivalent weight PO-rich polyols having a number average equivalent weight from 800 to 2,000 or (iv) from 10 to 40% by weight of one or more propylene oxide co-polymer polyols containing styrene-acrylonitrile.
展开▼