Patent US4746365A successfully refreshed from Google Patents.
US4746365A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Utilization of latexes with hydraulic cement and gypsum compositions
Assignee: Construction Products Research Inc
•
Filing: 1987-02-02
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Granted: 1988-05-24
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Expires: 2007-02-02
Abstract
Abstract This invention relates to improved aluminous cement/gypsum compositions that contain polymer latex emulsions or compounds to produce self-curing, crack-free, fast-setting, high early strength, high bonding, water resistant, durable, cementitious mixtures for finishing, coating, plastering, stucco, rigid insulation protection, topping, resurfacing, patching, motaring, tile grouting, concrete, and the like. In addition, this invention discloses a method for improving the properties and performance of aluminous cement/gypsum compositions by adding certain types, amounts and/or combinations of polymer latex emulsions or compounds with or without the addition of wet expansion and drying shrinkage inhibitors.
Inventors
- 👤 Warner K. Babcock
- 👤 David A. Ruefenacht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:06
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/06; C04B24/00; C04B24/24; C04B24/26; C04B2111/00; C04B2111/34; C04B2111/346
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
79 words
A method for reducing the wet expansion and drying shrinkage of an aluminous cement which comprises adding thereto: (a) gypsum in an amount above about 5 to about 55 percent by weight based on the amount of the aluminous cement to reduce drying shrinkage; and (b) a first polymer latex emulsion such that the percent polymer solids based on the amount of the aluminous cement and gypsum is about 1 to 25 percent by weight to reduce wet expansion.
Claim 2
Independent Claim
79 words
A method for reducing the wet expansion and drying shrinkage of an aluminous cement which comprises adding thereto: (a) gypsum in an amount above about 5 to about 55 percent by weight based on the amount of the aluminous cement to reduce drying shrinkage; and (b) a first polymer latex emulsion such that the percent polymer solids based on the amount of the aluminous cement and gypsum is about 1 to 25 percent by weight to reduce wet expansion.
Claim 3
Dependent Claim
18 words
The method according to claim 1 wherein the amount of gypsum ranges from about 50 to 40 percent.
Claim 4
Dependent Claim
23 words
The method according to claim 1 where the amount of solids of first polymer latex emulsion ranges from 2 to 15 weight percent.
Claim 5
Dependent Claim
48 words
The method according to claim 1 which further comprises adding a second polymer latex emulsion such that the percent polymer solids of the second emulsion based on the amount of the aluminous cement and gypsum is about 1 to 25 percent by weight to further reduce drying shrinkage.
Claim 6
Dependent Claim
25 words
The method according to claim 4 wherein the amount of solids of the second polymer latex emulsion ranges from about 2 to 15 weight percent.
Claim 7
Independent Claim
78 words
A method for reducing the drying shrinkage of an aluminous cement which comprises adding thereto: (a) gypsum in an amount of above about 5 to about 55 percent by weight based on the amount of the aluminous cement to reduce drying shrinkage; and (b) a first polymer latex emulsion such that the percent polymer solids based on the amount of the aluminous cement and gypsum is about 1 to 25 percent by weight to further reduce drying shrinkage.
Claim 8
Independent Claim
78 words
A method for reducing the drying shrinkage of an aluminous cement which comprises adding thereto: (a) gypsum in an amount of above about 5 to about 55 percent by weight based on the amount of the aluminous cement to reduce drying shrinkage; and (b) a first polymer latex emulsion such that the percent polymer solids based on the amount of the aluminous cement and gypsum is about 1 to 25 percent by weight to further reduce drying shrinkage.
Claim 9
Dependent Claim
18 words
The method according to claim 6 wherein the amount of gypsum ranges from about 5 to 40 percent.
Claim 10
Dependent Claim
24 words
The method according to claim 6 wherein the amount of solids of the polymer latex emulsion ranges from about 2 to 15 weight percent.
Claim 11
Dependent Claim
47 words
The method according to claim 6 which further comprises adding a second polymer latex emulsion such that the percent of solids of the second emulsion based on the amount of the aluminous cement and gypsum is about 1 to 25 percent by weight to reduce wet expansion.
Claim 12
Dependent Claim
24 words
The method according to claim 9 wherein the amount of solids of the second polymer emulsion ranges from about 2 to 5 weight percent.
Claim 13
Independent Claim
74 words
A method for reducing the wet expansion of a cementitious composition comprising aluminous cement in an amount of 60 to 95 weight percent and gypsum in an amount of 5 to 40 weight percent, which method comprises adding thereto a first polymer latex emulsion such that the percent polymer solids based on the amount of aluminous cement and gypsum in the cementitious composition is about 1 to 25 weight percent to inhibit wet expansion.
Claim 14
Independent Claim
74 words
A method for reducing the wet expansion of a cementitious composition comprising aluminous cement in an amount of 60 to 95 weight percent and gypsum in an amount of 5 to 40 weight percent, which method comprises adding thereto a first polymer latex emulsion such that the percent polymer solids based on the amount of aluminous cement and gypsum in the cementitious composition is about 1 to 25 weight percent to inhibit wet expansion.
Claim 15
Dependent Claim
24 words
The method according to claim 11 wherein the amount of solids of first polymer latex emulsion ranges from about 2 to 15 weight percent.
Claim 16
Dependent Claim
31 words
The method according to claim 11 which further comprises adding a lithium salt in an amount of about 0.01 to 0.5 weight percent based on the weight of the cementitious composition.
Claim 17
Dependent Claim
22 words
The method according to claim 13 wherein the lithium salt is lithium carbonate, lithium citrate, lithium hydroxide, lithium acetate, or mixtures thereof.
Claim 18
Dependent Claim
36 words
The method according to claim 11 which further comprises adding thereto Portland cement in an amount of about 0.1 to 25 percent by weight based on the weight of the cementitious composition to reduce drying shrinkage.
Claim 19
Dependent Claim
35 words
The method according to claim 11 which further comprises adding aluminum sulfate in an amount of about 0.1 to 15 percent by weight based on the weight of the cementitious composition to reduce drying shrinkage.
Claim 20
Dependent Claim
47 words
The method according to claim 11 which further comprises adding a second polymer latex emulsion such that the percent polymer solids of the second emulsion based on the amount of the aluminous cement and gypsum is about 1 to 25 percent by weight to reduce drying shrinkage.
Claim 21
Dependent Claim
24 words
The method according to claim 17 wherein the amount of solids of the second polymer latex emulsion ranges from about 2 to15 weight percent.
Claim 22
Independent Claim
76 words
A method for reducing the drying shrinkage of a cementitious composition comprising aluminous cement in an amount of about 60 to 95 weight percent and gypsum in an amound of about 5 to 40 weight percent, which method comprises adding a first polymer latex emulsion such that the percent polymer solids based on the amount of aluminous cement and gypsum in the cementitious composition is about 1 to 25 weight percent to reduce the drying shrinkage.
Claim 23
Independent Claim
76 words
A method for reducing the drying shrinkage of a cementitious composition comprising aluminous cement in an amount of about 60 to 95 weight percent and gypsum in an amound of about 5 to 40 weight percent, which method comprises adding a first polymer latex emulsion such that the percent polymer solids based on the amount of aluminous cement and gypsum in the cementitious composition is about 1 to 25 weight percent to reduce the drying shrinkage.
Claim 24
Dependent Claim
24 words
The method according to claim 19 wherein the amount of solids of first polymer latex emulsion ranges from about 2 to 15 weight percent.
Claim 25
Dependent Claim
36 words
The method according to claim 19 which further comprises adding thereto Portland cement in an amount of about 0.1 to 25 percent by weight based on the weight of the cementitious composition to reduce drying shrinkage.
Claim 26
Dependent Claim
31 words
The method according to claim 19 which further comprises adding a lithium salt in an amount of about 0.01 to 0.5 weight percent based on the weight of the cementitious composition.
Claim 27
Dependent Claim
35 words
The method according to claim 19 which further comprises adding aluminum sulfate in an amount of about 0.1 to 15 percent by weight based on the weight of the cementitious composition to reduce drying shrinkage.
Claim 28
Dependent Claim
46 words
The method according to claim 19 which further comprises adding a second polymer latex emulsion such that the percent polymer solids of the second emulsion based on the amount of hydraulic cement and gypsum is about 1 to 25 percent by weight to reduce drying shrinkage.
Claim 29
Independent Claim
80 words
A method for reducing the wet expansion and drying shrinkage of a cementitious composition comprising aluminous cement which comprises adding thereto: (a) gypsum in an amount of about 5 to 40 percent by weight based on the amount of aluminous cement to reduce drying shrinkage; and (b) a first polymer latex emulsion such that the percent polymer solids based on the amount of the aluminous cement and gypsum is about 2 to 15 percent by weight to reduce wet expansion.
Claim 30
Independent Claim
80 words
A method for reducing the wet expansion and drying shrinkage of a cementitious composition comprising aluminous cement which comprises adding thereto: (a) gypsum in an amount of about 5 to 40 percent by weight based on the amount of aluminous cement to reduce drying shrinkage; and (b) a first polymer latex emulsion such that the percent polymer solids based on the amount of the aluminous cement and gypsum is about 2 to 15 percent by weight to reduce wet expansion.
Claim 31
Dependent Claim
20 words
The method according to claim 23 wherein the amount of gypsum ranges from about 10 to 25 percent by weight.
Claim 32
Dependent Claim
47 words
The method according to claim 25 which further comprises adding a second polymer latex emulsion such that the percent polymer solids of the second emulsion, based on the amount of aluminous cement and gypsum, is about 2 to 15 percent by weight to further reduce drying shrinkage.
Claim 33
Dependent Claim
24 words
The method according to claim 25 wherein the amount of solids of first polymer latex emulsion ranges from about 5 to 10 weight percent.
Claim 34
Dependent Claim
25 words
The method according to claim 27 wherein the amount of solids of the second polymer latex emulsion ranges from about 5 to 10 weight percent.
Claim 35
Dependent Claim
31 words
The method according to claim 25 which further comprises adding a lithium salt in an amount of about 0.01 to 0.5 weight percent based on the weight of the cementitious composition.
Claim 36
Dependent Claim
22 words
The method according to claim 30 wherein the lithium salt is lithium carbonate, lithium citrate, lithium hydroxide, lithium acetate, or mixtures thereof.
Claim 37
Dependent Claim
36 words
The method according to claim 25 which further comprises adding thereto Portland cement in an amount of about 1 to 20 percent by weight based on the weight of the cementitious composition to reduce drying shrinkage.
Claim 38
Dependent Claim
35 words
The method according to claim 25 which further comprises adding aluminum sulfate in an amount of about 0.1 to 15 percent by weight based on the weight of the cementitious composition to reduce drying shrinkage.
Claim 39
Independent Claim
77 words
A method for reducing the drying shrinkage of an aluminous cement which comprises adding thereto: (a) gypsum in an amount of above about 10 to about 25 percent by weight based on the amount of the aluminous cement to reduce drying shrinkage; and (b) a polymer latex emulsion such that the percent polymer solids based on the amount of the aluminous cement and gypsum is about 2 to 15 percent by weight to further reduce drying shrinkage.
Claim 40
Independent Claim
77 words
A method for reducing the drying shrinkage of an aluminous cement which comprises adding thereto: (a) gypsum in an amount of above about 10 to about 25 percent by weight based on the amount of the aluminous cement to reduce drying shrinkage; and (b) a polymer latex emulsion such that the percent polymer solids based on the amount of the aluminous cement and gypsum is about 2 to 15 percent by weight to further reduce drying shrinkage.
Claim 41
Dependent Claim
24 words
The method according to claim 34 wherein the amount of solids of the polymer latex emulsion ranges from about 5 to 10 weight percent.
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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) | 1991-05-24 | 1991-11-23 | 1992-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-24 | 1995-11-23 | 1996-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-24 | 1999-11-23 | 2000-05-24 | $7700.00 | Window Closed / Lapsed |