IP Library › Granted Patent US 7,261,772
Granted Patent B1
US 7,261,772 · App. 11/581,930 · Granted Aug 28, 2007

Gypsum composition

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Quick Facts
Patent No.
US 7,261,772
App. No.
11/581,930
Granted
Aug 28, 2007
Kind
B1
Abstract

A gypsum composition comprising water, stucco, clay, an amine compound, a polyoxyalkylene, and a comb-branched copolymer is disclosed. The gypsum composition has improved fluidity. A method for preparing the gypsum composition is also disclosed. The method comprises mixing the components to form a slurry, casting the slurry into a product, and drying the product.

Claims (12)

1. A gypsum composition comprising water, stucco, clay, a polyoxyalkylene, an amine compound, and a comb-branched copolymer.

2. The composition of claim 1 , wherein the clay is present in an amount within the range of about 0.01% to about 10% of the total weight of the gypsum composition.

3. The composition of claim 1 , wherein the clay is present in an amount within the range of about 0.05% to about 5% of the total weight of the gypsum composition.

4. The composition of claim 1 , wherein the polyoxyalkylene is present in an amount within the range of about 0.01% to about 4% of the total weight of the gypsum composition.

5. The composition of claim 1 , wherein the polyoxyalkylene is present in an amount within the range of about 0.1% to about 1% of the total weight of the gypsum composition.

6. The composition of claim 1 , wherein the amine compound is present in an amount within the range of about 0.01% to about 4% of the total weight of the gypsum composition.

7. The composition of claim 1 , wherein the amine compound is present in an amount within the range of about 0.1% to about 1% of the total weight of the gypsum composition.

8. The composition of claim 1 , wherein the amine compound is selected from the group consisting of aliphatic amines, quaternary amines, an alkoxylated amines, amine oxides, and mixtures thereof.

9. The composition of claim 1 , wherein the comb-branched copolymer is present in an amount within the range of about 0.005% to about 1% of the total weight of the gypsum composition.

10. The composition of claim 1 , wherein the comb-branched copolymer is present in an amount within the range of about 0.025% to about 0.5% of the total weight of the gypsum composition.

11. The composition of claim 1 , wherein the polyether macromonomer is an acrylate or methacrylate of a propylene oxide and ethylene oxide copolymer.

12. The composition of claim 1 , wherein the comb-branched copolymer is at least partially neutralized.

Assignments (7)
RELEASE OF SECURITY INTEREST Recorded May 5, 2010
From: CITIBANK, N.A., AS COLLATERAL AGENT
To: LYONDELL CHEMICAL TECHNOLOGY, L.P.; EQUISTAR CHEMICALS, LP
Reel/Frame 024337/0705 →
RELEASE OF SECURITY INTEREST Recorded May 5, 2010
From: CITIBANK, N.A., AS COLLATERAL AGENT
To: LYONDELL CHEMICAL TECHNOLOGY, L.P.; EQUISTAR CHEMICALS, LP
Reel/Frame 024337/0856 →
CORRECTIVE ASSIGNMENT TO CORRECT PATENT NUMBER 6,214,598 ERRONEOUSLY RECORDED AT REEL 021590, FRAME 0234. Recorded Oct 17, 2008
From: LYONDELL CHEMICAL TECHNOLOGY, LP.
To: COATEX SAS
Reel/Frame 021691/0913 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 25, 2008
From: LYONDELL CHEMICAL TECHNOLOGY, L.P.
To: COATEX SAS
Reel/Frame 021590/0234 →
PARTIAL RELEASE OF LYONDELL CHEMICAL TECHNOLOGY, L.P. PATENT SECURITY AGREEMENT Recorded May 23, 2008
From: CITIBANK, N.A., AS COLLATERAL AGENT
To: LYONDELL CHEMICAL TECHNOLOGY, L.P.
Reel/Frame 020995/0187 →
GRANT OF SECURITY INTEREST IN UNITED STATES PATENTS AND PATENT APPLICATIONS Recorded Mar 26, 2008
From: BASELL POLYOLEFINE GMBH; ARCO CHEMICAL TECHNOLOGY L.P.; ARCO CHEMICAL TECHNOLOGY, INC.; ATLANTIC RICHFIELD COMPANY; BASELL NORTH AMERICA, INC.; EQUISTAR CHEMICALS. LP.; LYONDELL CHEMICAL COMPANY; LYONDELL CHEMICAL TECHNOLOGY, L.P.; LYONDELL PETROCHEMICAL COMPANY; NATIONAL DISTILLERS AND CHEMICAL CORPORATION; OCCIDENTAL CHEMICAL CORPORATION; OLIN CORPORATION; QUANTUM CHEMICAL CORPORATION; BASELL POLYOLEFIN GMBH
To: CITIBANK, N.A., AS COLLATERAL AGENT
Reel/Frame 020704/0562 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 17, 2006
From: SCHWARTZ, STEVEN A.; LEE, SALLIE J.; LIOTTA JR., FRANK J.; ARRELL, ROBERT M.
To: LYONDELL CHEMICAL TECHNOLOGY, L.P.
Reel/Frame 018428/0697 →