US4792360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Workable cement composition of low water content containing a hydroxyalkyl (meth)acrylate polymer
Assignee: Dow Chemical Co
•
Filing: 1987-06-30
•
Granted: 1988-12-20
•
Expires: 2007-06-30
Abstract
Abstract Cement compositions having better and longer lasting workability have been made by adding to said compositions a polymer or copolymer of a hydroxyalkyl(meth)acrylate, e.g. hydroxyethyl acrylate or methacrylate. Further improvement is achieved by adding a water reducer, e.g. sulfonated polystyrene, and an antifoam agent, e.g. a polyalkylenepolyol.
Inventors
- 👤 Richard A. Pierce
- 👤 Tipton T. Masterson
- 👤 David A. Grilli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:12
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/24; C04B24/26; C04B24/2641; C04B24/16; C04B28/00; C04B28/02; C04B2111/00; C04B2111/00474; C04B2111/00482; C04B2111/00525
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
27 words
A cement composition having improved workability comprising cement and a polymer of a hydroxyalkyl (meth)acrylate or a copolymer thereof with another hydroxyalkyl (meth)acrylate or with sulfoethyl methacrylate.
Claim 2
Dependent Claim
27 words
A cement composition having improved workability comprising cement and a polymer of a hydroxyalkyl (meth)acrylate or a copolymer thereof with another hydroxyalkyl (meth)acrylate or with sulfoethyl methacrylate.
Claim 3
Dependent Claim
13 words
The composition of claim 1 wherein the hydroxyalkyl group contains 2-4 carbon atoms.
Claim 4
Dependent Claim
22 words
The composition of claim 2 wherein the polymer or copolymer has a molecular weight (Mw) of from about 2,000 to about 150,000.
Claim 5
Dependent Claim
22 words
The composition of claim 3 wherein the polymer or copolymer has a molecular weight (Mw) of from about 3,000 to about 50,000.
Claim 6
Dependent Claim
22 words
The composition of claim 4 wherein the polymer or copolymer has a molecular weight (Mw) of from about 4,000 to about 10,000.
Claim 7
Dependent Claim
31 words
The composition of claim 1 wherein the polymer or copolymer is present in an amount of from about 0.01 to about 1.0 percent based on the weight of the dry cement.
Claim 8
Dependent Claim
30 words
The composition of claim 6 wherein the polymer or copolymer is present in an amount of from about 0.1 to about 0.5 based on the weight of the dry cement.
Claim 9
Dependent Claim
28 words
The composition of claim 3 wherein the polymer is present in an amount of from about 0.1 to about 0.5 based on the weight of the dry cement.
Claim 10
Dependent Claim
13 words
The composition of claim 3 wherein the cement composition contains an antifoam agent.
Claim 11
Dependent Claim
15 words
The composition of claim 9 wherein the antifoam agent is a polyetherpolyol or a polysiloxane.
Claim 12
Dependent Claim
12 words
The composition of claim 10 wherein the polyetherpolyol is a glycerol derivative.
Claim 13
Dependent Claim
15 words
The composition of claim 11 wherein the polyetherpolyol has a molecular weight (Mw) about 5,000.
Claim 14
Dependent Claim
14 words
The composition of claim 3 wherein the cement composition contains a water reducing agent.
Claim 15
Dependent Claim
18 words
The composition of claim 13 wherein the water reducing agent is a polymer or a copolymer of styrene.
Claim 16
Dependent Claim
13 words
The composition of claim 14 wherein the polymer is a homopolymer of styrene.
Claim 17
Dependent Claim
16 words
The composition of claim 14 wherein the copolymer is a copolymer of styrene and maleic anhydride.
Claim 18
Dependent Claim
15 words
The composition of claim 14 wherein the copolymer is a copolymer of styrene and α-methylstyrene.
Claim 19
Dependent Claim
18 words
The composition of claim 2 wherein the composition contains both an antifoam agent and a water reducing agent.
Claim 20
Dependent Claim
14 words
The composition of claim 18 wherein the polymer is a polymer of hydroxyethyl acrylate.
Claim 21
Dependent Claim
24 words
A cement composition having improved workability comprising cement, an antifoam agent, a water reducing agent and a copolymer of hydroxyethyl acrylate and 2-sulfoethyl methacrylate.
Claim 22
Dependent Claim
24 words
A cement composition having improved workability comprising cement, an antifoam agent, a water reducing agent and a copolymer of hydroxyethyl acrylate and 2-sulfoethyl methacrylate.
Claim 23
Dependent Claim
20 words
The composition of claim 19 wherein the antifoam is a polyetherpolyol and the water reducing agent is a sulfonated polystyrene.
Claim 24
Dependent Claim
20 words
The composition of claim 20 wherein the antifoam is a polyetherpolyol and the water reducing agent is a sulfonated polystyrene.
Claim 25
Dependent Claim
29 words
A process for improving the workability of a cement composition comprising adding to said cement composition a polymer of a hydroxyalkyl (meth)acrylate or copolymer thereof with another hydroxyalkyl (meth)acrylate.
Claim 26
Dependent Claim
29 words
A process for improving the workability of a cement composition comprising adding to said cement composition a polymer of a hydroxyalkyl (meth)acrylate or copolymer thereof with another hydroxyalkyl (meth)acrylate.
Claim 27
Dependent Claim
14 words
The process of claim 23 wherein the polymer is a polymer of hydroxyethyl acrylate.
Claim 28
Dependent Claim
24 words
A process for improving the workability of a cement composition comprising adding to said cement composition a copolymer of hydroxyethyl acrylate and 2-sulfoethyl methacrylate.
Claim 29
Dependent Claim
24 words
A process for improving the workability of a cement composition comprising adding to said cement composition a copolymer of hydroxyethyl acrylate and 2-sulfoethyl methacrylate.
Claim 30
Dependent Claim
17 words
The process of claim 23 wherein an antifoam agent and a water reducing agent are also added.
References Cited (Backward Citations)
US4473406A
Cited
US4524163A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-12-20 | 1992-06-20 | 1992-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-20 | 1996-06-20 | 1996-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-20 | 2000-06-20 | 2000-12-20 | $7700.00 | Window Closed / Lapsed |