摘要:
The invention describes a method for producing reactive plastics molded bodies with a high proportion of coarse-grained filler, in which the coarse-grained filler is heated to an elevated temperature before being fed into the mold.
摘要:
Molded polyurea foam parts having densities of from 200 to 600 kg/m.sup.3 and a compact skin are made by reacting a polyisocyanate component with a polyamine component in a closed mold at an isocyanate index of from 70 to 130. The polyamine component generally includes (1) an aminopolyether having a molecular weight of from 1800 to 12,000 and 2 to 3 isocyanate reactive groups of which at least 90% are aromatically bound primary and/or secondary amino groups, (2) an aromatic diamine, (3) a foaming agent and optionally (4) known auxiliaries and additives. The polyisocyanate component includes any aromatic di- and/or poly-isocyanate. Parts produced by this process have excellent mechanical properties and a well-defined solid skin.
摘要翻译:通过使多异氰酸酯组分与多胺组分在封闭模具中以70至130的异氰酸酯指数反应制备密度为200至600kg / m 3的模制聚脲泡沫部件和紧密表皮。多胺组分通常包括(1 )分子量为1800〜12,000的氨基聚醚和2〜3个异氰酸酯反应性基团,其中至少90%是芳族结合的伯和/或仲氨基,(2)芳族二胺,(3)发泡剂和 (4)已知的助剂和添加剂。 多异氰酸酯组分包括任何芳族二 - 和/或多异氰酸酯。 通过该方法生产的部件具有优异的机械性能和明确的固体皮肤。