Patent US4658110A successfully refreshed from Google Patents.
US3850651A
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US
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Cementing compositions and concretes and mortars derived therefrom
Assignee: Imperial Chemical Industries Ltd
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Filing: 1973-03-20
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Granted: 1974-11-26
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Expires: 1993-03-20
Abstract
Abstract Concretes and mortars having improved mechanical properties and resistance to chemicals are obtained by incorporating vinyl polymers or copolymers into cementing compositions and effecting curing (after a period of initial setting) at an elevated temperature.
Inventors
- 👤 F Duncan
- 👤 R Chappell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:31
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/24; C04B24/26; C04B24/2641; C04B28/00; C04B28/02
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
78 words
A METHOD OF PREPARATION OF A CONCRETE OR MORTAR WHICH COMPRISES CURING A CEMENT COMPOSITION COMPRISING: I. AN INORGANIC CEMENT; AND II. AN AQUEOUS DISPERSION OF A COPOLYMER DERIVED FROM (A) ONE OR MORE ALKYL ACRYLATES AND OR ALKYL METHACRYLATES HAVING FROM 1 TO 8 CARBON ATOMS IN THE ALKYL GROUP AND (B) AN ETHYLRNICALLY-UNSATURATED CARBOXYLIC ACID COPOLYMERIZABLE THEREWITH, THE SAID CURING BEING EFFECTED, AFTER A PERIOD OF INITIAL SETTING AT AN ELEVATED TEMPERATURE OF AT LEAST 40*C.
Claim 2
Independent Claim
78 words
A METHOD OF PREPARATION OF A CONCRETE OR MORTAR WHICH COMPRISES CURING A CEMENT COMPOSITION COMPRISING: I. AN INORGANIC CEMENT; AND II. AN AQUEOUS DISPERSION OF A COPOLYMER DERIVED FROM (A) ONE OR MORE ALKYL ACRYLATES AND OR ALKYL METHACRYLATES HAVING FROM 1 TO 8 CARBON ATOMS IN THE ALKYL GROUP AND (B) AN ETHYLRNICALLY-UNSATURATED CARBOXYLIC ACID COPOLYMERIZABLE THEREWITH, THE SAID CURING BEING EFFECTED, AFTER A PERIOD OF INITIAL SETTING AT AN ELEVATED TEMPERATURE OF AT LEAST 40*C.
Claim 3
Dependent Claim
14 words
A method according to claim 1 wherein the curing temperature is at least 50*C.
Claim 4
Dependent Claim
17 words
A method according to claim 2 wherein the curing temperature is in the range 50*C to 200*C.
Claim 5
Dependent Claim
17 words
A method according to claim 3 wherein the curing temperature is in the range 70*C to 160*C.
Claim 6
Dependent Claim
14 words
A method according to claim 2 wherein the curing temperature is at least 90*C.
Claim 7
Dependent Claim
19 words
A method according to claim 1 wherein the curing period at the elevated temperature is at least 12 hours.
Claim 8
Dependent Claim
17 words
A method according to claim 1 wherein the period of initial setting is at least 12 hours.
Claim 9
Dependent Claim
17 words
A method as claimed in claim 1 wHerein the initial setting is effected at substantially ambient temperature.
Claim 10
Dependent Claim
13 words
A method according to claim 1 wherein the alkyl methacrylate is methyl methacrylate.
Claim 11
Dependent Claim
29 words
A method according to claim 1 employing both an alkyl acrylate and an alkyl methacrylate wherein the alkyl acrylate is 2-ethylhexyl acrylate and the alkyl methacrylate is methyl methacrylate.
Claim 12
Dependent Claim
17 words
A method according to claim 1 wherein the ethylenically-unsaturated carboxylic acid is acrylic acid or methacrylic acid.
Claim 13
Dependent Claim
20 words
A method according to claim 1 wherein there is employed a copolymer of methyl methacrylate, 2-ethylhexyl acrylate and acrylic acid.
Claim 14
Dependent Claim
18 words
A method according to claim 1 wherein the copolymer has a glass transition temperature of at least 10*C.
Claim 15
Dependent Claim
18 words
A method according to claim 13 wherein the copolymer has a glass transition temperature of at least 20*C.
Claim 16
Dependent Claim
33 words
A method according to claim 1 wherein the proportion of copolymer (calculated on a dry basis) is from 5 percent to 50 percent by weight of the inorganic cement component of the composition.
Claim 17
Dependent Claim
22 words
A method according to claim 15 wherein the proportion of copolymer is from 15 percent to 35 percent of the cement component.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |