| 摘要 |
<p>A foamed material, which is adapting under pressure to the shape of parts, particularly of parts of the human body, but which on pressure relief again returns to a vast extent and after a certain restoring time into the original shape, consists of the following constituents: (a) substantially saturated liquid hydrocarbons; (b) unsaturated liquid hydrocarbons, preferably polybutadiene; (c) a reactive agent, preferably polyisocyanate, with which the unsaturated liquid hydrocarbons are reacted; (d) a cross-linking agent, for example ethylene hexane diol; (e) hollow microspheres, the thin shell of which consists of vinylidene chloride copolymer and the interior of which contains a gas. The production of such a foamed material is preferably such that the substantially saturated liquid hydrocarbons and the unsaturated hydrocarbons are intermixed, noting that particles consisting of a vinylidene chloride copolymer and containing an inflating agent are added to this mixture or to a constituent of this mixture, and noting that the mixture is, prior or after this addition, heated to a temperature between 92 DEG C. and 165 DEG C. and preferably 105 DEG C., so that hollow microspheres are formed in situ, and that subsequently the cross-linking agent is added and that finally, after optionally adding a catalyst, the mixture is combined with the reactive agent and intensely mixed, whereupon the mixture is filled into a mold and allowed to react.</p> |
