Pre-blend composition, and method of making joint compound using same
AssigneeNational Gypsum Properties, LLC
InventorsAmba Ayambem, Richard E. Smith, Salvatore Taravella
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Abstract
A pre-blend composition for preparation of joint compound including water, a cellulose ether thickener, and about 19% or less by weight of a salt selected from the group consisting of potassium carbonate, potassium sulfate, sodium acetate, and mixtures thereof, wherein the composition is essentially free of alumina, is disclosed.
Claims37
A pre-blend composition for preparation of joint compound, comprising:
- a cellulose ether thickener;
- and
- a salt selected from the group consisting of potassium sulfate, sodium acetate, and mixtures thereof in an amount suitable to suspend the cellulose ether thickener;
- wherein said composition is essentially free of alumina, and the salt is present at a concentration of up to about 19% by weight of the composition.
A pre-blend composition for preparation of joint compound, comprising
- water;
- a cellulose ether thickener;
- and
- a salt selected from the group consisting of potassium sulfate, sodium acetate, and mixtures thereof;
- wherein the weight ratio of cellulose ether thickener to salt is at least about 0.75 to 1 and said composition is essentially free of alumina.
A composition for preparation of joint compound, the composition comprising water, methyl hydroxypropyl cellulose, attapulgite clay, a binder, a glycol, and about 4% by weight to about 19% by weight of a salt selected from the group consisting of potassium sulfate, potassium carbonate, sodium acetate, and mixtures thereof.
A method of preparing a pre-blend composition for preparation of joint compound comprising the steps of:
- a) preparing a mixture of water and a salt selected from the group consisting of potassium sulfate, potassium carbonate, sodium acetate, and mixtures thereof in an amount suitable to suspend the cellulose ether thickener;
- followed by
- b) adding a cellulose ether to the mixture of step a) to form a pre-blend composition, wherein said salt is present at a concentration of up to about 19% by weight of the composition, and said pre-blend composition is essentially free of alumina.
Dependencies are inferred from the claim text.