| 摘要 |
Novel polyurethane resin foam compositions are provided which are only water-blown and require no halocarbon blowing agents, yet suffer no degradation in physical properties. The formulations include a hydrated salt system containing at least two hydrated salts that release water at a temperature above 80 DEG C. By using at least an acidic salt and a basic salt, the pH of the salt system may be balanced. A preferred hydrated salt system is a combination of borax (sodium tetraborate decahydrate) and alum (aluminum potassium sulfate dodecahydrate). |
