PROCEDIMIENTO PARA LA PREPARACION DE UNA MASILLA ENDURECI- BLE CON ACIDOS, QUE PROPORCIONA UNIONES RESISTENTES A LOS ALCALIS.

摘要

A cement composition yielding alkaline-resistant bonds consisting of a mixture of a) a solution of at least one partially etherified methylol phenol and at least one partially etherified methylol alkylphenol in a solvent, the methylol phenol components having at least two positions reactive with formaldehyde and being free of alkaline catalysts used in their preparation, with b) a cement powder containing an acid catalyst, an acid-hardened, alkali-resistant cement obtained therefrom by curing and the process of their preparations.