Low-cost, effective phosphate-based lime bucking inhibitor
AssigneeKnauf Gips KG
InventorsScott Cimaglio, Sriram K. Valluri
Life of this patent
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Abstract
A dry construction plaster composition made with at least stucco in an amount from about 25 to about 99 wt %; hydrated lime in an amount from about 0.5 to about 75 wt %; a phosphate-based lime bucking inhibitor in an amount from about 0.01 to about 1 wt %; and a setting reaction controlling agent, wherein the setting reaction controlling agent comprises a set accelerator, a set inhibitor, or any combination thereof is provided. Methods for preparing construction plaster slurries and pastes with reduced lime bucking and methods for finishing a substrate are also provided.
Claims14
A dry construction plaster composition comprising:
- stucco in an amount from about 25 to about 99 wt %;
- hydrated lime in an amount from about 5 to about 50 wt %;
- a phosphate-based lime bucking inhibitor in an amount from about 0.01 to about 1 wt %;
- and
- a setting reaction controlling agent, wherein the setting reaction controlling agent comprises a combination of a set accelerator and a set inhibitor;
- wherein the set accelerator comprises calcium sulfate anhydrate, calcium sulfate dihydrate, calcium sulfate dihydrate co-ground with sugar, sodium or any mixture thereof;
- and
- wherein the set inhibitor comprises diethylenetriaminepenta-acetate, pentasodium diethylenetriaminepenta-acetate, potassium bitartrate, citric acid or salt, maleic acid or salt, succinic acid or salt, tartaric acid or salt, or any combination thereof.
Dependencies are inferred from the claim text.