US3885985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Additive for improving hydraulic cement compositions
Assignee: WR Grace and Co
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Filing: 1974-04-01
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Granted: 1975-05-27
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Expires: 1994-04-01
Abstract
Abstract An additive for imparting water repellancy to, and retarding the set of hydraulic cement compositions (e.g., Portland cement compositions such as masonry cements) is described which is an aqueous oil-in-water emulsion containing water, a waterinsoluble, water-repelling acid component (e.g. tall oil), an emulsifier (e.g. a salt of such acid), and a setting timeretarding agent (e.g. sucrose). The additive is ideally dispersible in water and preferably contains an air-entraining agent as an additional optional component. Intergrinding the emulsified additive with the cement component is the preferred manner of incorporating the additive in the cement composition.
Inventors
- 👤 Frank G Serafin
- 👤 Robert W Previte
- 👤 Robert F Stierli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:14
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
98 words
AN ADDITIVE FOR HYDRAULIC CEMENT COMPOSITIONS WHICH ADDITIVE IS READILY DISPERSIBLE IN WATER AND COMPRISES AN OIL-INWATER EMULSION IN WHICH THE SOLIDS PORTION IS COMPRISED OF A MAJOR PROPORTION OF A WATER-INSOLUBLE, WATER-REPELLING ACID COMPONENT SELECTED FROM THE GROUP CONSISTING OF FATTY ACIDS, ROSIN ACIDS AND MIXTURES THEREOF, FROM ABOUT 3 TO ABOUT 30 PERCENT BY WEIGHT OF A SET-RETARDING COMPONENT FOR SAID HYDRAULIC CEMENT, AND AT LEAST ABOUT 0.5 PERCENT BY WEIGHT OF AN EMULSIFIER FORMED BY REACTING SAID ACID COMPONENT WITH A BASE CAPABLE OF FORMING A SALT THEREOF, WHICH SALT WILL MAINTAIN A STABLE EMULSION.
Claim 2
Dependent Claim
98 words
AN ADDITIVE FOR HYDRAULIC CEMENT COMPOSITIONS WHICH ADDITIVE IS READILY DISPERSIBLE IN WATER AND COMPRISES AN OIL-INWATER EMULSION IN WHICH THE SOLIDS PORTION IS COMPRISED OF A MAJOR PROPORTION OF A WATER-INSOLUBLE, WATER-REPELLING ACID COMPONENT SELECTED FROM THE GROUP CONSISTING OF FATTY ACIDS, ROSIN ACIDS AND MIXTURES THEREOF, FROM ABOUT 3 TO ABOUT 30 PERCENT BY WEIGHT OF A SET-RETARDING COMPONENT FOR SAID HYDRAULIC CEMENT, AND AT LEAST ABOUT 0.5 PERCENT BY WEIGHT OF AN EMULSIFIER FORMED BY REACTING SAID ACID COMPONENT WITH A BASE CAPABLE OF FORMING A SALT THEREOF, WHICH SALT WILL MAINTAIN A STABLE EMULSION.
Claim 3
Dependent Claim
19 words
The additive of claim 1 wherein said retarding component is a retarder of the setting time of Portland cement.
Claim 4
Dependent Claim
14 words
The additive of claim 1 wherein said acid component is derived from tall oil.
Claim 5
Dependent Claim
22 words
The additive of claim 1 containing as an additional component other than the components recited, an air-entraining agent for said cement composition.
Claim 6
Dependent Claim
108 words
An additive for Portland cement compositions, which additive is readily dispersible in water and comprises an oil-in-water emulsion containing at least about 25 percent by weight of water and a solids portion comprised of a major proportion of a water-insoluble, water-repelling acid component selected from the group consisting of fatty acids, rosin acids and mixtures thereof, from about 3 to about 30 percent by weight of solids of a water-soluble, set-retarding component for said cement, and at least about 0.5 percent by weight of an emulsifier formed by reacting said acid component with a base capable of forming a salt thereof, which salt will maintain a stable emulsion.
Claim 7
Dependent Claim
108 words
An additive for Portland cement compositions, which additive is readily dispersible in water and comprises an oil-in-water emulsion containing at least about 25 percent by weight of water and a solids portion comprised of a major proportion of a water-insoluble, water-repelling acid component selected from the group consisting of fatty acids, rosin acids and mixtures thereof, from about 3 to about 30 percent by weight of solids of a water-soluble, set-retarding component for said cement, and at least about 0.5 percent by weight of an emulsifier formed by reacting said acid component with a base capable of forming a salt thereof, which salt will maintain a stable emulsion.
Claim 8
Dependent Claim
13 words
The additive of claim 5 wherein said salt is an alkali metal salt.
Claim 9
Dependent Claim
12 words
The additive of claim 5 wherein said set-retarding agent is a carbohydrate.
Claim 10
Dependent Claim
99 words
An additive for Portland cement compositions, which additive is readily dispersible in water and comprises an oil-in-water emulsion containing at least about 25 percent by weight of water and a solids portion containing from about 60 to about 95 percent by weight of tall oil acid, from about 3 to about 35 percent by weight of a retarder of the setting time of said cement, at least about 0.5 percent by weight of a salt of said acid as an emulsifier, and from about 1 to about 5 percent by weight of an air-entraining agent for said cement composition.
Claim 11
Dependent Claim
99 words
An additive for Portland cement compositions, which additive is readily dispersible in water and comprises an oil-in-water emulsion containing at least about 25 percent by weight of water and a solids portion containing from about 60 to about 95 percent by weight of tall oil acid, from about 3 to about 35 percent by weight of a retarder of the setting time of said cement, at least about 0.5 percent by weight of a salt of said acid as an emulsifier, and from about 1 to about 5 percent by weight of an air-entraining agent for said cement composition.
Claim 12
Dependent Claim
16 words
The additive of claim 8 wherein said air-entraining agent is a condensation product of ethylene oxide.
Claim 13
Dependent Claim
23 words
The additive of claim 8 wherein said retarder is a carbohydrate and said emulsifier is formed by reacting said acid with sodium hydroxide.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |