A MORTAR CONTAINING A CONERNATION PRODUCT OF FORMALDEHYDE,AN ALKALI METAL SALT OF SULPHUROUS OR PYROS.ACAD AND A CYCLOALKANONE

摘要

A mortar comprising an inorganic binder such as anhydrite, gypsum or cement is rendered more flowable and processible by incorporating therein a sulfonic acid group-containing formaldehyde condensation product with a cycloalkanone, e.g. preferably about 0.05 to 5% by weight of the binder of the condensation product of sodium sulfite, formaldehyde and cyclohexanone. There may also be present an auxiliary such as FeSO4,7 H2O,Al2(SO4)3.18 H2O or KAl(SO4)2, as well as an additive such as a plasticizer, hardening accelerator, retarder, air-entraining agent, thickener, activator, anti-foam agent or synthetic resin dispersion, and/or an aggregate such as sand, silica, perlite, pumice or foamed plastic beads.