| 摘要 |
There is disclosed a non-flammable rigid foam on the basis of phenolic resin and furane resin, containing aluminum hydroxide and further components as a filler system. The weight ratio of resin substance:filler substance is at least 1:2.5 and up to 1:3.2 and the bulk density is from 50 kg/m3 to 450 kg/m3. The resin compound is the reaction product obtained by the reaction with one another of 50-62 weight parts resolic resin 0-15 weight parts furanic resin 25-40 weight parts furfuryl alcohol 0.5-1.5 weight parts foam stabilizer including 14-17 parts by weight per 100 parts by weight of resin component+filler substance of a curing agent mixture composed of 40-50 weight parts phosphoric acid 12-17 weight parts boron hydrofluoric acid 6-7 weight parts p-toluene sulfonic acid or p-phenol sulfonic acid and 32-35 weight parts water, wherein the filler system is composed of: 40-50 weight parts aluminum hydroxide; 10-20 weight parts boric acid; 7-25 weight parts cryolite; 1-3 weight parts copper-II oxide; and 2-5 weight parts sodium tetraborate or a filler component selected from the group consisting of zinc borate, magnesium hydroxide, zinc hydroxide and mixtures thereof, the ratio of borate or said filler component:boric acid being 1:5.
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