The invention relates to a casting investment compound for the preparation of investment compound models and casting moulds for alloy parts, especially in dental technology, using the MgO-SiO2-P2O5 ceramic system. The invention relates also to investment compound models and casting moulds consisting of the investment casting compound described and to a method of preventing efflorescence of investment compound models and casting moulds consisting of an investment casting compound. To avoid efflorescences (formation of sodium phosphate) it is proposed to add 0.01 to 10 % by mass of a water-soluble acid or acids or of at least one solid organic carboxylic acid having 2 to 10 carbon atoms, soluble in water and/or a C1-C4-alcohol.
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机译：本发明涉及一种使用MgO-SiO 2 -P 2 O 5陶瓷体系制备用于合金零件尤其是牙科技术的熔模化合物模型和铸模的熔模化合物。本发明还涉及由所述熔模铸造化合物组成的熔模化合物模型和铸模，以及涉及一种防止熔模化合物模型的风化的方法和由熔模铸造化合物组成的铸模。为了避免风化（形成磷酸钠），建议添加0.01至10质量％的一种或多种水溶性酸或至少一种可溶于水和/或碳原子的具有2至10个碳原子的固体有机羧酸。 C1-C4醇。
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