Process for impermeabilising porous or pervious masonry, concrete and other stony materials

摘要

410,479. Proofing permeable materials. NAAMLOOZE VENNOOTSCHAP DE BATAAFSCHE PETROLEUM MAATSCHAPPIJ, 30, Carel van Bylandtlaan, The Hague. Oct. 10, 1932, No. 11454/34. Convention date, Oct. 28, 1931. Divided on 409,760. [Class 140.] Masonry, concrete and other stony materials are rendered impermeable to water and air by impregnating them with stabilized aqueous dispersions of bituminous substances and causing or allowing the dispersions to coagulate in the material. The dispersions used are those described in Specification 409,760.