Hydrogenfluorides of aminosilanols and their use

Details Hydrogenfluorides of aminosilanols and their use Hydrogenfluorides of aminosilanols and their use

B - Operations, Transporting

22

C

B22C 1/22 (2006.01) B22C 9/00 (2006.01) C07F 7/04 (2006.01) C07F 7/08 (2006.01) C07F 7/10 (2006.01) C08G 18/54 (2006.01) C08J 3/00 (2006.01) C08K 5/54 (2006.01) C08L 75/00 (2006.01)

Patent

CA 2446729

This invention relates to hydrogenfluorides of aminosilanols and their use. The hydrogenfluorides of aminosilanols are formed by 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.

La présente invention concerne des hydrofluorures d'aminosilanols et leur utilisation. Pour obtenir ces hydrofluorures d'aminosilanols on fait réagir avec un aminoalcoxysilane une solution aqueuse d'un acide fluoré, de préférence l'acide fluorhydrique. Les hydrofluorures d'aminosilanols conviennent particulièrement dans les liants de fonderie, plus particulièrement les liants de fonderie à l'urétane phénolique pour moulage à froid et moulage en boîte froide.

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