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US4083729A
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Hydraulic cement composition
Assignee: Astellas Pharma Inc
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Filing: 1977-02-02
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Granted: 1978-04-11
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Expires: 1997-02-02
Abstract
Abstract An improved hydraulic cement composition having an almost constant air content, which is incorporated with an organic phosphoric acid ester of the formula <IMAGE> Wherein R1 is a group of the formula: R4-O-(CH2CH2O)n- wherein R4 is an alkyl having 4 to 18 carbon atoms, an alkenyl having 4 to 18 carbon atoms or an aryl substituted with an alkyl having 4 to 18 carbon atoms and n means an average addition molar number of ethylene oxide and is an integer of 0 to 15 in average, and R2 and R3 are the same or different and are each hydroxy or a group of the formula: R4-O-(CH2CH2O)n- wherein R4 and n are as defined above, or a salt thereof with an inorganic or organic base, as an air entraining agent, optionally together with a dispersing agent and an accelerator.
Inventors
- 👤 Senri Yamada
- 👤 Kanji Nagasawa
- 👤 Tokiaki Mori
- 👤 Masaru Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:59
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/003
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
114 words
A hydraulic cement composition which contains an organic phosphoric acid ester of the formula: ##STR11## wherein R 1 is a group of the formula: R 4 --O--(CH 2 CH 2 O) n -- wherein R 4 is alkenyl having 4 to 18 carbon atoms or aryl substituted with an alkyl group having 4 to 18 carbon atoms and n is an average addition molar number of ethylene oxide of 5 to 14, R 2 and R 3 are the same or different and are each hydroxy or a group of the formula: R 4 --O--(CH 2 CH 2 O) n -- wherein R 4 and n are as defined above, or a salt thereof.
Claim 2
Dependent Claim
114 words
A hydraulic cement composition which contains an organic phosphoric acid ester of the formula: ##STR11## wherein R 1 is a group of the formula: R 4 --O--(CH 2 CH 2 O) n -- wherein R 4 is alkenyl having 4 to 18 carbon atoms or aryl substituted with an alkyl group having 4 to 18 carbon atoms and n is an average addition molar number of ethylene oxide of 5 to 14, R 2 and R 3 are the same or different and are each hydroxy or a group of the formula: R 4 --O--(CH 2 CH 2 O) n -- wherein R 4 and n are as defined above, or a salt thereof.
Claim 3
Dependent Claim
40 words
The hydraulic cement composition of claim 1, wherein said organic phosphoric acid ester is in the form of a salt thereof with an inorganic or organic base selected from the group consisting of sodium, potassium, magnesium, ammonium, monoethanolamine and hexylamine.
Claim 4
Dependent Claim
33 words
The hydraulic cement composition of claim 1, wherein the organic phosphoric acid ester is incorporated in an amount of 0.0001 to 2% by weight based on the weight of cement in the composition.
Claim 5
Dependent Claim
32 words
The hydraulic cement composition of claim 1, wherein said organic phosphoric acid ester is incorporated together with a dispersing agent selected from the group consisting of gluconic acid, sodium gluconate and glucono-δ-lactone.
Claim 6
Dependent Claim
25 words
The hydraulic cement composition of claim 1, wherein said organic phosphoric acid ester is a mixture of a monoester and a diester and/or a triester.
Claim 7
Dependent Claim
109 words
A hydraulic cement composition, which contains an organic phosphoric acid ester of the formula: ##STR12## wherein R 1 is a group of the formula: R 4 --O--(CH 2 CH 2 O) n --, wherein R 4 is an aryl group substituted with an alkyl group having 4 to 18 carbon atoms and n is an average addition molar number of ethylene oxide of 5 to 14, and R 2 and R 3 are the same or different and are each hydroxy or a group of the formula: R 4 --O--(CH 2 CH 2 O) n --, wherein R 4 and n are as defined above, or a salt thereof.
Claim 8
Dependent Claim
109 words
A hydraulic cement composition, which contains an organic phosphoric acid ester of the formula: ##STR12## wherein R 1 is a group of the formula: R 4 --O--(CH 2 CH 2 O) n --, wherein R 4 is an aryl group substituted with an alkyl group having 4 to 18 carbon atoms and n is an average addition molar number of ethylene oxide of 5 to 14, and R 2 and R 3 are the same or different and are each hydroxy or a group of the formula: R 4 --O--(CH 2 CH 2 O) n --, wherein R 4 and n are as defined above, or a salt thereof.
Claim 9
Dependent Claim
40 words
The hydraulic cement composition of claim 6, wherein said organic phosphoric acid ester is in the form of a salt thereof with an inorganic or organic base selected from the group consisting of sodium, potassium, magnesium, ammonium, monoethanolamine and hexylamine.
Claim 10
Dependent Claim
35 words
The hydraulic cement composition of claim 6, wherein said organic phosphoric acid ester is incorporated in an amount of 0.0001 to 2% by weight on the basis of the weight of cement in the composition.
Claim 11
Dependent Claim
32 words
The hydraulic cement composition of claim 6, wherein said organic phosphoric acid ester is incorporated together with a dispersing agent selected from the group consisting of gluconic acid, sodium gluconate and glucono-δ-lactone.
Claim 12
Dependent Claim
25 words
The hydraulic cement composition of claim 6, wherein said organic phosphoric acid ester is a mixture of a monoester and a diester and/or a triester.
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) | 1981-04-10 | 1981-10-10 | 1982-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-10 | 1985-10-10 | 1986-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-10 | 1989-10-10 | 1990-04-11 | $7700.00 | Window Closed / Lapsed |