This invention relates to hydrogenfluorides of aminosilanols and their use. The hydrogenfluorides of aminosilanols are formed by the reaction of an aqueous solution of a fluorinated acid, preferably, hydrofluoric acid, with an aminoalkoxysilane. The hydrogenfluorides of aminosilanols are particularly useful in foundry binders, most particularly no-bake and cold-box phenolic urethane foundry binders.

Questa invenzione riguarda i hydrogenfluorides dei aminosilanols e del loro uso. I hydrogenfluorides dei aminosilanols sono costituiti preferibilmente dalla reazione di una soluzione acquosa di un acido fluorato, acido fluoridrico, con un aminoalkoxysilane. I hydrogenfluorides dei aminosilanols sono particolarmente utili nei raccoglitori della fonderia, il piĆ¹ specialmente nessun-cuociono e nei raccoglitori fenolici della fonderia dell'uretano della freddo-scatola.

 
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< Method of and apparatus for automatically controlling operation of a continuous casting plant

< Direct-current arc furnace comprising a centric charging shaft for producing steel and a method therefor

> Iron castings with compacted or spheroidal graphite produced by determining coefficients from cooling curves and adjusting the content of structure modifying agents in the melt

> Method of controlling the output voltage of a furnace

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