Boron-free anti-sagging additive for gypsum building materials
AssigneeKnauf Gips KG
InventorsBernd PIETSCHMANN, Michael STEINBAUER, David WEIGAND, Verena KOHLER, Juliane KÖHLER
Life of this patent
Estimating the term…
Abstract
The invention concerns an anti-sagging additive for producing shaped gypsum articles. The additive is boron-free and comprises L-tartaric acid and/or L-tartrates and a pH-enhancing compound.
Claims14
An anti-sagging additive for producing shaped gypsum articles, comprising L-tartaric acid and/or L-tartrates and a pH-enhancing compound but no boron-containing compounds.
4-5. (canceled)
A shaped gypsum article produced at least from a slurry formed from calcined gypsum, water, and an anti-sagging additive, wherein the anti-sagging additive comprises L-tartaric acid and/or L-tartrates and a pH-enhancing compound but no boron compounds.
A method for producing a shaped gypsum articles comprising steps of mixing of calcined gypsum with water and an additive, wherein the additive comprises L-tartaric acid and/or L-tartrates and a pH-enhancing compound, and forming the shaped gypsum article.
Dependencies are inferred from the claim text.