US4558079A
Expired / Lapsed
US
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Tape joint cement composition
Assignee: Aqualon Co
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Filing: 1984-12-24
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Granted: 1985-12-10
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Expires: 2004-12-24
Abstract
Abstract Tape joint cement compositions suitable for use with wallboard are disclosed wherein at least one hydroxypropylhydroxyethylcellulose having specified substitution levels is employed as the water retention aid and thickener. Blends of hydroxypropylhydroxyethylcellulose with (a) at least one cellulose ether, such as, hydroxyethylcellulose, hydroxypropylcellulose, methylcellulose, methylhydroxyethylcellulose, and methylhydroxypropylcellulose or (b) a hydroxyalkylguar, such as hydroxypropylguar and hydroxyethylguar are also disclosed.
Inventors
- 👤 Armand J. Desmarais
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:12
CPC Classifications
C; C04; C04B; C04B26/00; C04B26/02; C04B26/04; C09; C09D; C09D5/00; C09D5/34; C09K; C09K3/00; C09K3/10; C09K3/1006; C09K3/1015
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
83 words
In joint cement composition having limestone; mica; a clay selected from the group consisting of attapulgite, bentonite, montmorillonite and mixtures thereof; a thickener, and a resinous binder as its principal ingredients, the improvement which comprises using from about 0.2% to about 2.0%, by weight based on the dry ingredients, of at least one hydroxypropylhydroxyethylcellulose having a hydroxyethyl substitution from about 0.5 to about 4.0 M.S. and a hydroxypropyl substitution greater than 0.36 to about 1.5 M.S. as a water retention aid and thickener.
Claim 2
Dependent Claim
83 words
In joint cement composition having limestone; mica; a clay selected from the group consisting of attapulgite, bentonite, montmorillonite and mixtures thereof; a thickener, and a resinous binder as its principal ingredients, the improvement which comprises using from about 0.2% to about 2.0%, by weight based on the dry ingredients, of at least one hydroxypropylhydroxyethylcellulose having a hydroxyethyl substitution from about 0.5 to about 4.0 M.S. and a hydroxypropyl substitution greater than 0.36 to about 1.5 M.S. as a water retention aid and thickener.
Claim 3
Dependent Claim
16 words
The composition of claim 1 wherein the hydroxypropylhydroxyethylcellulose has a hydroxypropyl substitution greater than 0.6 M.S.
Claim 4
Dependent Claim
28 words
The composition of claim 2 wherein the hydroxypropylhydroxyethylcellulose has a hydroxyethyl M.S. from about 0.8 to about 1.8 and a hydroxypropyl M.S. from about 0.8 to about 1.5.
Claim 5
Dependent Claim
19 words
The composition of claim 1 wherein the hydroxypropylhydroxyethylcellulose is present at a concentration from about 0.5% to about 1.0%.
Claim 6
Dependent Claim
112 words
In joint cement composition having limestone; mica; a clay selected from the group consisting of attapulgite, bentonite, montmorillonite and mixtures thereof; a thickener; and a resinous binder as its principal ingredients, the improvement which comprises using from about 0.2% to about 2.0%, by weight based on the dry ingredients, of a mixture of (a) at least one hydroxypropylhydroxyethylcellulose having a hydroxyethyl substitution from about 0.5 to about 4.0 M.S. and a hydroxypropyl substitution greater than 0.36 to about 1.5 M.S., and (b) a cellulose ether, having a total M.S. from about 1.5 to about 4.0 and, optionally, a D.S. from about 0.4 to about 2.0, as a water retention aid and thickener.
Claim 7
Dependent Claim
112 words
In joint cement composition having limestone; mica; a clay selected from the group consisting of attapulgite, bentonite, montmorillonite and mixtures thereof; a thickener; and a resinous binder as its principal ingredients, the improvement which comprises using from about 0.2% to about 2.0%, by weight based on the dry ingredients, of a mixture of (a) at least one hydroxypropylhydroxyethylcellulose having a hydroxyethyl substitution from about 0.5 to about 4.0 M.S. and a hydroxypropyl substitution greater than 0.36 to about 1.5 M.S., and (b) a cellulose ether, having a total M.S. from about 1.5 to about 4.0 and, optionally, a D.S. from about 0.4 to about 2.0, as a water retention aid and thickener.
Claim 8
Dependent Claim
16 words
The composition of claim 5 wherein the hydroxypropylhydroxyethylcellulose has a hydroxypropyl substitution greater than 0.6 M.S.
Claim 9
Dependent Claim
28 words
The composition of claim 6 wherein the hydroxypropylhydroxyethylcellulose has a hydroxyethyl M.S. from about 0.8 to about 1.8 and a hydroxypropyl M.S. from about 0.8 to about 1.5.
Claim 10
Dependent Claim
22 words
The composition of claim 5 wherein the cellulose ether is selected from the group consisting of hydroxyethylcellulose, hydroxypropylcellulose, methylcellulose, methylhydroxyethylcellulose and methylhydroxypropylcellulose.
Claim 11
Dependent Claim
108 words
In joint cement composition having limestone; mica; a clay selected from the group consisting of attapulgite, bentonite, montmorillonite and mixtures thereof; a thickener, and a resinous binder as its principal ingredients, the improvement which comprises using from about 0.2% to about 2.0%, by weight based on the dry ingredients, of a mixture of (a) at least one hydroxypropylhydroxyethylcellulose having a hydroxyethyl substitution from about 0.5 to about 4.0 M.S. and a hydroxypropyl substitution greater than 0.36 to about 1.5 M.S. and (b) a hydroxyalkylguar selected from the group consisting of hydroxypropylguar and hydroxyethylguar having an M.S. from about 0.1 to 1.2 as a water retention aid and thickener.
Claim 12
Dependent Claim
108 words
In joint cement composition having limestone; mica; a clay selected from the group consisting of attapulgite, bentonite, montmorillonite and mixtures thereof; a thickener, and a resinous binder as its principal ingredients, the improvement which comprises using from about 0.2% to about 2.0%, by weight based on the dry ingredients, of a mixture of (a) at least one hydroxypropylhydroxyethylcellulose having a hydroxyethyl substitution from about 0.5 to about 4.0 M.S. and a hydroxypropyl substitution greater than 0.36 to about 1.5 M.S. and (b) a hydroxyalkylguar selected from the group consisting of hydroxypropylguar and hydroxyethylguar having an M.S. from about 0.1 to 1.2 as a water retention aid and thickener.
Claim 13
Dependent Claim
16 words
The composition of claim 9 wherein the hydroxypropylhydroxyethylcellulose has a hydroxypropyl substitution greater than 0.6 M.S.
Claim 14
Dependent Claim
28 words
The composition of claim 10 wherein the hydroxypropylhydroxyethylcellulose has a hydroxyethyl M.S. from about 0.8 to about 1.8 and a hydroxypropyl M.S. from about 0.8 to about 1.5.
Claim 15
Dependent Claim
21 words
The composition of claim 9 wherein the hydroxyalkylguar is a hydroxypropylguar having a hydroxypropyl M.S. from about 0.1 to about 0.5.
Claim 16
Dependent Claim
26 words
The composition of claim 1 wherein said dry ingredients are mixed with sufficient water to produce a viscosity of about 400 to about 640 Brabender units.
Claim 17
Dependent Claim
26 words
The composition of claim 9 wherein said dry ingredients are mixed with sufficient water to produce a viscosity of about 400 to about 640 Brabender units.
Claim 18
Dependent Claim
26 words
The composition of claim 5 wherein said dry ingredients are mixed with sufficient water to produce a viscosity of about 400 to about 640 Brabender units.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-09 | 1989-06-10 | 1989-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-09 | 1993-06-10 | 1993-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-09 | 1997-06-10 | 1997-12-10 | $7700.00 | Window Closed / Lapsed |