| 摘要 |
<p>A method for preparing a high resilient flexible polyurethane foam, in slabstocks and moulding, wherein a modified or not high reactive polyether-polyol, having an average molecular weight from 3,000 to 10,000 and an average functionality not larger than 4 with an amount of at least 50 % hydroxyl groups, is brought into reaction with organic polyisocyanates in the presence of a "cross-linker/extender", a catalyst and a chemical and physical blowing means and eventually in the presence of a relatively weak foam stabilizer, whereby the physical blowing means comprises methylformate.</p> |
