| 摘要 |
<p>Asbestos-free heat-settable sealant material suitable for application to pipework for the conveyance of hot gas, comprising a plastic matrix of heat-resistant inorganic particles admixed with an aqueous solution or dispersion of binder substance which is essentially organic, said aqueous solution or dispersion containing a humectant to reduce the rate of water loss from the matrix during storage at ambient temperature and thus to preserve plasticity therein, said plastic matrix enclosing cellulose fibres which act as reinforcement for the matrix during heat-setting of the material. The cellulosic fibres may be in the form of a felt, or they may be used as discrete fibres. The binder may be sodium silicate or aluminium orthophosphate. The humectant may be ethylene glycol. The compositions may be used for the temporary repair and/or patching of pipework containing hot gases, e.g. exhaust systems.</p> |
