Patent US4401472A successfully refreshed from Google Patents.
US4401472A
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Hydraulic cement mixes and processes for improving hydraulic cement mixes
Assignee: Sandoz AG
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Filing: 1982-02-26
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Granted: 1983-08-30
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Expires: 2002-02-26
Abstract
Abstract A hydraulic cement mix including hydraulic cement, aggregate, sufficient water to effect hydraulic setting of the cement, and an additive comprising a poly(hydroxyalkylated)polyethyleneamine or a poly(hydroxyethyl)polyethyleneimine or mixtures of each or both, the additive being present in an amount sufficient to increase the compressive strength of the hardened mix. Generally, the additive is present in a total amount of up to about 1.0% by weight based upon the weight of the cement, usually in an amount of between about 0.01% and about 0.25% by weight based upon the weight of the cement, preferably in an amount in the range of about 0.02% to about 0.07% by weight.
Inventors
- 👤 Arthur H. Gerber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:25
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/12; C04B24/24; C04B24/28; C04B24/32
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
68 words
A hydraulic cement mix comprising a hydraulic cement, aggregate in an amount of up to 80% by weight based upon the total weight of said cement mix, sufficient water to effect hydraulic setting of the cement, and an additive comprising a poly(hydroxyalkylated)polyethyleneamine or a poly(hydroxyalkylated)polyethyleneimine or mixtures of each or both, said additive being present in an amount sufficient to increase the compressive strength of the hardened mix.
Claim 2
Dependent Claim
68 words
A hydraulic cement mix comprising a hydraulic cement, aggregate in an amount of up to 80% by weight based upon the total weight of said cement mix, sufficient water to effect hydraulic setting of the cement, and an additive comprising a poly(hydroxyalkylated)polyethyleneamine or a poly(hydroxyalkylated)polyethyleneimine or mixtures of each or both, said additive being present in an amount sufficient to increase the compressive strength of the hardened mix.
Claim 3
Dependent Claim
16 words
A hydraulic cement mix in accordance with claim 1, wherein said hydraulic cement comprises portland cement.
Claim 4
Dependent Claim
30 words
A hydraulic cement mix in accordance with claim 1, wherein said additive is present in an amount of up to 1.0% by weight based upon the weight of the cement.
Claim 5
Dependent Claim
33 words
A hydraulic cement mix in accordance with claim 1, wherein said additive is present in an amount of between about 0.005% and about 0.25% by weight based upon the weight of the cement.
Claim 6
Dependent Claim
33 words
A hydraulic cement mix in accordance with claim 1, wherein said additive is present in an amount of between about 0.02% and about 0.07% by weight based upon the weight of the cement.
Claim 7
Dependent Claim
14 words
A hydraulic cement mix in accordance with claim 1, wherein said additive comprises tetra(hydroxyethyl)ethylenediamine.
Claim 8
Dependent Claim
14 words
A hydraulic cement mix in accordance with claim 1, wherein said additive comprises N,N'-di(hydroxyethyl)ethylenediamine.
Claim 9
Dependent Claim
14 words
A hydraulic cement mix in accordance with claim 1, wherein said additive comprises penta(hydroxyethyl)diethylenetriamine.
Claim 10
Dependent Claim
64 words
A hydraulic cement mix in accordance with claim 1, wherein the additive is poly(hydroxyalkylated)polyethyleneamine having the following formula: ##STR2## wherein X is 1, 2 or 3 and R is selected from hydrogen, 2-hydroxyethyl, and 2-hydroxypropyl, each R can be the same or different, and at least 40% of the R groups are hydroxyalkyl, with no more than 40% of the R groups being hydroxypropyl.
Claim 11
Dependent Claim
15 words
A hydraulic cement mix in accordance with claim 9, wherein X is 1 or 2.
Claim 12
Dependent Claim
27 words
A hydraulic cement mix in accordance with claim 1, wherein the additive is selected from the group consisting of tetra(hydroxyethyl)ethylenediamine, N,N,N'-tri-(hydroxyethyl)ethylenediamine, N,N,N'-tri-(hydroxyethyl)diethylenetriamine, penta-(hydroxyethyl)diethylenetriamine, N,N'-di-(hydroxyethyl)ethylenediamine, N,N'-bis(2-hydroxypropyl)diethylenetriamine and bis-(2-hydroxypropyl)-tri(hydroxyethyl)diethylenetriamine.
Claim 13
Dependent Claim
14 words
A hydraulic cement mix in accordance with claim 1, wherein the additive is poly(hydroxyethyl)polyethyleneimine.
Claim 14
Dependent Claim
24 words
A hydraulic cement mix in accordance with claim 1, wherein said aggregate is present in an amount of from 20% to 80% by weight.
Claim 15
Dependent Claim
74 words
A process for increasing the compressive strength of hardened hydraulic cement mixes which include hydraulic cement, aggregate in an amount of up to 80% by weight based upon the total weight of said cement mix, and sufficient water to effect hydraulic setting of the cement, comprising incorporating an additive comprising a poly(hydroxyalkylated)polyethyleneamine or a poly(hydroxyalkylated)polyethyleneimine or mixtures of each or both in an amount sufficient to increase the compressive strength of said cement mix.
Claim 16
Dependent Claim
74 words
A process for increasing the compressive strength of hardened hydraulic cement mixes which include hydraulic cement, aggregate in an amount of up to 80% by weight based upon the total weight of said cement mix, and sufficient water to effect hydraulic setting of the cement, comprising incorporating an additive comprising a poly(hydroxyalkylated)polyethyleneamine or a poly(hydroxyalkylated)polyethyleneimine or mixtures of each or both in an amount sufficient to increase the compressive strength of said cement mix.
Claim 17
Dependent Claim
14 words
A process in accordance with claim 14, wherein said hydraulic cement comprises portland cement.
Claim 18
Dependent Claim
29 words
A process in accordance with claim 14, wherein the said additive is present in an amount of up to 1.0% by weight based upon the weight of the cement.
Claim 19
Dependent Claim
31 words
A process in accordance with claim 14, wherein the said additive is present in an amount of between about 0.01% and 0.5% by weight based upon the weight of the cement.
Claim 20
Dependent Claim
31 words
A process in accordance with claim 14, wherein the said additive is present in an amount of between about 0.01% and 0.1% by weight based upon the weight of the cement.
Claim 21
Dependent Claim
29 words
A process in accordance with claim 14, wherein said additive is present in an amount of between 0.02% and 0.07% by weight based upon the weight of the cement.
Claim 22
Dependent Claim
12 words
A process in accordance with claim 14, wherein said additive comprises tetra(hydroxyethyl)ethylenediamine.
Claim 23
Dependent Claim
12 words
A process in accordance with claim 14, wherein said additive comprises N,N'-di(hydroxyethyl)ethylenediamine.
Claim 24
Dependent Claim
12 words
A process in accordance with claim 14, wherein said additive comprises penta(hydroxyethyl)diethylenetriamine.
Claim 25
Dependent Claim
62 words
A process in accordance with claim 14, wherein the additive is poly(hydroxyalkylated)polyethyleneamine having the following formula: ##STR3## wherein X is 1, 2 or 3 and R is selected from hydrogen, 2-hydroxyethyl, and 2-hydroxypropyl, each R can be the same or different, and at least 40% of the R groups are hydroxyalkyl, with no more than 40% of the R groups being hydroxypropyl.
Claim 26
Dependent Claim
13 words
A process in accordance with claim 23, wherein X is 1 or 2.
Claim 27
Dependent Claim
25 words
A process in accordance with claim 14, wherein the additive is selected from the group consisting of tetra(hydroxyethyl)ethylenediamine, N,N,N'-tri-(hydroxyethyl)ethylenediamine, N,N,N'-tri-(hydroxyethyl)diethylenetriamine, penta-(hydroxyethyl)diethylenetriamine, N,N'-di(hydroxyethyl)ethylenediamine, N,N'-bis-(2-hydroxypropyl)diethylenetriamine, and bis-(2-hydroxypropyl)tri(hydroxyethyl)diethylenetriamine.
Claim 28
Dependent Claim
12 words
A process in accordance with claim 14, wherein the additive is poly(hydroxyethyl)polyethyleneimine.
Claim 29
Dependent Claim
22 words
A process in accordance with claim 14, wherein said aggregate is present in an amount of from 20% to 80% by weight.
References Cited (Backward Citations)
US3674522A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-29 | 1987-02-28 | 1987-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-29 | 1991-02-28 | 1991-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-29 | 1995-02-28 | 1995-08-30 | $7700.00 | Window Closed / Lapsed |