| 摘要 |
<p>The compsn contain a hydraulic cement (Portland, chalk or calcium sulphate based) with a low density aggregate in fibrous or fine particle form, water and an organic polyisocyanate with a polyhydroxypolyether. The aggregate consists of expanded polystyrene or polyurethane, sawdust, vermiculite, asbestos, glass and cotton fibres etc. and has density is not >2 g/cm3. The compsns are fast setting, of lighter wt. and more durable than the high density products described in BE 732602.</p> |
