US4758612A
Expired / Lapsed
US
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Cement-forming compositions
Assignee: BTG International Ltd
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Filing: 1986-10-21
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Granted: 1988-07-19
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Expires: 2006-10-21
Abstract
Abstract A hardenable composition which comprises (i) a poly(carboxylic acid) or precursor thereof (as herein defined); (ii) a particulate ion-leachable silicate, aluminosilicate or metal oxide reactable with (i) in the presence of water to set to a hardened composition; and (iii) a compound comprising at least one phosphorus-carbon or phosphorus-boron covalent bond, in an amount effective in service to extend the working time of the composition.
Inventors
- 👤 Alan D. Wilson
- 👤 Havard J. Prosser
- 👤 David M. Groffman
- 👤 Gary S. Sayers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:28
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/28; A; A61; A61K; A61K6/00; A61K6/30; A61K6/50; A61K6/54; A61K6/80; A61K6/884; A61K6/887; A61K6/889; C04B2111/00; C04B2111/00474; C04B2111/00836
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
66 words
A hardenable composition which comprises (i) a poly(carboxylic acid) or precursor thereof (as herein defined); (ii) a particulate ion-leachable silicate, aluminosilicate or metal oxide reactable with (i) in the presence of water to set to a hardened composition; and (iii) boron phosphate or a compound comprising at least one phosphorus-carbon covalent bond, in an amount effective in service to extend the working time of the composition.
Claim 2
Dependent Claim
66 words
A hardenable composition which comprises (i) a poly(carboxylic acid) or precursor thereof (as herein defined); (ii) a particulate ion-leachable silicate, aluminosilicate or metal oxide reactable with (i) in the presence of water to set to a hardened composition; and (iii) boron phosphate or a compound comprising at least one phosphorus-carbon covalent bond, in an amount effective in service to extend the working time of the composition.
Claim 3
Dependent Claim
31 words
A hardenable composition according to claim 1 wherein (i) comprises an acrylic acid homopolyer or copolymer acid with one or more aconitic, fumaric, itaconic, maleic, mesaconic, methacrylic, muconic or tiglic acid.
Claim 4
Dependent Claim
12 words
A hardenable composition according to claim 1 wherein (ii) comprises zinc oxide.
Claim 5
Dependent Claim
14 words
A hardenable composition according to claim 1 wherein (ii) comprises a (fluoro)aluminosilicate glass powder.
Claim 6
Dependent Claim
76 words
A hardenable composition according to claim 4 wherein the glass has a composition within the following system: (a) CaO--Al 2 O 3 --SiO 2 ; (b) CaO--Al 2 O 3 --SiO 2 --CaF 2 ; (c) CaF 2 --Al 2 O 3 --SiO 2 ; (d) CaF 2 --Al 2 O 3 --SiO 2 --AlPO 4 ; or (e) CaF 2 --Al 2 O 3 --SiO 2 --AlPO 4 AlF 3 --Na 3 AlF 6 .
Claim 7
Dependent Claim
14 words
A hardenable composition according to claim 1 wherein (iii) comprises a polybasic phosphonic acid.
Claim 8
Dependent Claim
16 words
A hardenable composition according to claim 6 wherein (iii) also comprises at least one amino group.
Claim 9
Dependent Claim
16 words
A hardenable composition according to claim 7 wherein the amino group is a tertiary amino group.
Claim 10
Dependent Claim
17 words
A hardenable composition according to claim 1 wherein (iii) is soluble in an aqueous solution of (i).
Claim 11
Dependent Claim
20 words
A hardenable composition according to claim 1 which further comprises a complexing agent soluble in an aqueous solution of (i).
Claim 12
Dependent Claim
15 words
A hardenable composition according to claim 10 wherein the complexing agent comprises a fluoride ligand.
Claim 13
Dependent Claim
15 words
A hardenable composition according to claim 10 wherein the complexing agent comprises a chelating agent.
Claim 14
Dependent Claim
17 words
A hardenable composition according to claim 12 wherein the chelating agent comprises a plurality of carboxyl groups.
Claim 15
Dependent Claim
19 words
A hardenable composition according to claim 13 wherein the chelating agent comprises aconitic, itaconic, maleic, mellitic or tricarballylic acid.
Claim 16
Dependent Claim
18 words
A hardenable composition according to claim 12 wherein the chelating agent also comprises at least one hydroxyl group.
Claim 17
Dependent Claim
17 words
A hardenable composition according to claim 15 wherein the chelating agent comprises citric, malic or tartaric acid.
Claim 18
Dependent Claim
16 words
A hardenable composition according to claim 12 wherein the chelating agent comprises a multivalent metal chelate.
Claim 19
Dependent Claim
20 words
A hardenable composition according to claim 17 wherein the chelating agent comprises a beta-diketone metal chelate or an EDTA chelate.
Claim 20
Dependent Claim
22 words
A hardenable composition according to claim 1 wherein (iii) is present in an amount of up to 20% by weight of (i).
Claim 21
Dependent Claim
22 words
A hardenable composition according to claim 1 wherein (iii) is present in an amount of up to 10% by weight of (i).
Claim 22
Dependent Claim
35 words
A hardenable composition according to any of claim 1 comprising a dry mixture of the poly(carboxylic acid) or precursor thereof (i) in particulate form; particulate ion-leachable silicate, (fluoro)aluminosilicate or metal oxide (ii); and compound (iii).
Claim 23
Dependent Claim
21 words
A hardenable composition according to claim 1 supplied as a two-component pack, one of which components may comprise an aqueous medium.
Claim 24
Dependent Claim
12 words
A hardenable composition according to claim 1 supplied as a sheet material.
Claim 25
Dependent Claim
61 words
A mixture suitable for use in preparing the hardenable composition of claim 1, which comprises compound (iii) as defined in claim 1 and (a) a complexing agent soluble in an aqueous solution of a poly(carboxylic acid) or precursor thereof (as herein defined) or (b) said poly(carboxylic acid) or said precursor or (c) said particulate component (ii) as defined in claim 1.
Claim 26
Dependent Claim
26 words
A process for preparing a hardened mass of a poly(carboxylate) cement, which comprises mixing water with components (i), (ii) and (iii) as defined in claim 1.
Claim 27
Dependent Claim
39 words
A process for preparing a hardened mass of a poly(carboxylate) cement, which comprises mixing water with components (i), (ii) and (iii) as defined in claim 1 and with a complexing agent soluble in an aqueous solution of component (i).
Claim 28
Dependent Claim
14 words
A hardened mass of a poly(carboxylate) cement prepared by the process of claim 26.
Claim 29
Dependent Claim
14 words
A hardened mass of a poly(carboxylate) cement prepared by the process of claim 25.
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) | 1991-07-19 | 1992-01-18 | 1992-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-19 | 1996-01-18 | 1996-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-19 | 2000-01-18 | 2000-07-19 | $7700.00 | Window Closed / Lapsed |