Mortar of inorganic binder and formaldehyde condensation product of sulfonated aromatic ether, imine or sulfone
AssigneeBayer Aktiengesellschaft
InventorKurt Schaupp
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Abstract
A mortar comprising an inorganic binder such as anhydrite, gypsum or cement is rendered more flowable and processible by incorporating therein a condensation product of formaldehyde with a sulfonated aromatic ether, imine or sulfone, e.g. preferably about 0.3 to 2% by weight of the binder of the condensation product of formaldehyde with sulfonated ditolyl ether. There may also be present an auxiliary such as FeSO.sub.4 . 7 H.sub.2 O, Al.sub.2 (SO.sub.4).sub.3. 18 H.sub.2 O or KA1(SO.sub.4).sub.2, as well as an additive such as a plasticizer, hardening accelerator, retarder, air-entraining agent, thickener, activator or anti-foam agent, and/or an aggregate such as sand, gravel, perlite, pumice or foamed plastic beads.
Claims7
A mortar comprising an inorganic binder and about 0.05 to 10% of its weight of a condensation product of formaldehyde with a compound of the formula ##SPC4##
- wherein
- R.sub.1 and R.sub.2 each independently is hydrogen, an alkyl radical with 1 to 6 carbon atoms or --NR'R";
- R' and R" each independently is hydrogen or an alkyl radical with 1 to 6 carbon atoms;
- A is --O--, --NR'-- or --SO.sub.2 --;
- M is hydrogen, an alkali metal or an equivalent of an alkaline earth or earth metal;
- m and n each independently is an integer from 1 to 5;
- and
- p is an integer from 0 to 4;
- the compound having at least one hydrogen atom capable of condensation with formaldehyde which can either be attached to a carbon atom of an aromatic ring or, where an NR'R"-- substituent is present in the molecule, to nitrogen.
Dependencies are inferred from the claim text.