US4519843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified polyalkylenepolyamines
Assignee: Dow Chemical Co
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Filing: 1984-08-08
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Granted: 1985-05-28
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Expires: 2004-08-08
Abstract
Abstract An aqueous hydraulic cement slurry is disclosed which comprises water, a hydraulic cement, a surfactant and, as a fluid loss additive, epihalohydrin derivatives of polyalkylenepolyamines.
Inventors
- 👤 Stephen B. Willis
- 👤 Pamela J. Boyce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:55
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/24; C04B24/28
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
169 words
In aqueous hydraulic cement slurry compositions comprising water, hydraulic cement, surfactant and polyalkylenepolyamine fluid loss additive; the improvement which comprises employing as said fluid loss additive, at least one composition prepared by reacting (A) at least one alkylenediamine or polyalkylenepolyamine composition having an average molecular weight of from about 60 to about 500; with (B) (1) at least one epihalohydrin, dihalohydrin or mixture thereof; or (2) a mixture of (a) at least one epihalohydrin, dihalohydrin or mixture thereof; and (b) at least one alkylene dihalide, and (C) optionally, one or more adducts of (1) at least one epihalohydrin, dihalohydrin or mixture thereof; and (2) at least one alkylenediamine or polyalkylenepolyamine having an average molecular weight of from about 60 to about 500 or a mixture thereof; wherein components (A), (B) and (C) are employed in quantities which provide a non-gelled polyamine which gives a fluid loss of less than 60 ml, preferably less than about 45 according to the API RP 10B fluid loss test described in the examples.
Claim 2
Dependent Claim
169 words
In aqueous hydraulic cement slurry compositions comprising water, hydraulic cement, surfactant and polyalkylenepolyamine fluid loss additive; the improvement which comprises employing as said fluid loss additive, at least one composition prepared by reacting (A) at least one alkylenediamine or polyalkylenepolyamine composition having an average molecular weight of from about 60 to about 500; with (B) (1) at least one epihalohydrin, dihalohydrin or mixture thereof; or (2) a mixture of (a) at least one epihalohydrin, dihalohydrin or mixture thereof; and (b) at least one alkylene dihalide, and (C) optionally, one or more adducts of (1) at least one epihalohydrin, dihalohydrin or mixture thereof; and (2) at least one alkylenediamine or polyalkylenepolyamine having an average molecular weight of from about 60 to about 500 or a mixture thereof; wherein components (A), (B) and (C) are employed in quantities which provide a non-gelled polyamine which gives a fluid loss of less than 60 ml, preferably less than about 45 according to the API RP 10B fluid loss test described in the examples.
Claim 3
Dependent Claim
96 words
An aqueous cement slurry composition of claim 1 wherein (i) component (A) has an average molecular weight of from about 150 to about 350; (ii) components (B-1) or (B-2-a) or (C-1) is epichlorohydrin; (iii) components (B-2-b) is ethylene dichloride; (iv) components (A), (B) and (C) are employed in quantities which provide a non-gelled polyamine which gives a fluid loss of less than about 45 ml according to the API RP 10B fluid loss test described in the examples and the viscosity of a solution containing 35% active material is from about 300 to about 10,000 cps.
Claim 4
Dependent Claim
23 words
A composition of claim 1 wherein the viscosity of a solution containing 35% active material is from about 300 to about 10000 cps.
Claim 5
Dependent Claim
23 words
A composition of claim 2 wherein the viscosity of a solution containing 35% active material is from about 2000 to about 4000 cps.
Claim 6
Dependent Claim
22 words
A composition of claim 3 wherein the viscosity of a solution containing 35% active material is from about 2000 to about 4000.
Claim 7
Dependent Claim
149 words
A modified alkylenediamine or polyalkylenepolyamine composition comprising the product resulting from reacting (A) at least one alkylenediamine or polyalkylenepolyamine composition having an average molecular weight of from about 60 to about 500; with (B) (1) at least one epihalohydrin , dihalohydrin or mixture thereof; or (2) a mixture of (a) at least one epihalohydrin, dihalohydrin or mixture thereof; and (b) at least one alkylene dihalide, and (C) optionally, one or more adducts of (1) at least one epihalohydrin, dihalohydrin or mixture thereof; and (2) at least one alkylenediamine or polyalkylenepolyamine having an average molecular weight of from about 60 to about 500 or a mixture thereof; wherein components (A), (B) and (C) are employed in quantities which provide a non-gelled polyamine which gives a fluid loss of less than 60 ml, preferably less than about 45 according to the API RP 10B fluid loss test described in the examples.
Claim 8
Dependent Claim
149 words
A modified alkylenediamine or polyalkylenepolyamine composition comprising the product resulting from reacting (A) at least one alkylenediamine or polyalkylenepolyamine composition having an average molecular weight of from about 60 to about 500; with (B) (1) at least one epihalohydrin , dihalohydrin or mixture thereof; or (2) a mixture of (a) at least one epihalohydrin, dihalohydrin or mixture thereof; and (b) at least one alkylene dihalide, and (C) optionally, one or more adducts of (1) at least one epihalohydrin, dihalohydrin or mixture thereof; and (2) at least one alkylenediamine or polyalkylenepolyamine having an average molecular weight of from about 60 to about 500 or a mixture thereof; wherein components (A), (B) and (C) are employed in quantities which provide a non-gelled polyamine which gives a fluid loss of less than 60 ml, preferably less than about 45 according to the API RP 10B fluid loss test described in the examples.
Claim 9
Dependent Claim
93 words
A composition of claim 6 wherein (i) component (A) has an average molecular weight of from about 150 to about 350; (ii) components (B-1) or (B-2-a) or (C-1) is epichlorohydrin; (iii) components (B-2-b) is ethylene dichloride; (iv) components (A), (B) and (C) are employed in quantities which provide a non-gelled polyamine which gives a fluid loss of less than about 45 ml according to the API RP 10B fluid loss test described in the examples and the viscosity of a solution containing 35% active material is from about 300 to about 10,000 cps.
Claim 10
Dependent Claim
23 words
A composition of claim 6 wherein the viscosity of a solution containing 35% active material is from about 300 to about 10000 cps.
Claim 11
Dependent Claim
23 words
A composition of claim 7 wherein the viscosity of a solution containing 35% active material is from about 2000 to about 4000 cps.
Claim 12
Dependent Claim
22 words
A composition of claim 8 wherein the viscosity of a solution containing 35% active material is from about 2000 to about 4000.
References Cited (Backward Citations)
US3210308A
Cited
US3491049A
Cited
US3511314A
Cited
US3988279A
Cited
US4260700A
Cited
US4191820A
Cited
US4328142A
Cited
US4401472A
Cited
US4482667A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-27 | 1988-11-26 | 1989-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-27 | 1992-11-26 | 1993-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-27 | 1996-11-26 | 1997-05-28 | $7700.00 | Window Closed / Lapsed |