Patent US4906298A successfully refreshed from Google Patents.
US4906298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic cement composition
Assignee: Zeon Corp
•
Filing: 1988-08-02
•
Granted: 1990-03-06
•
Expires: 2008-08-02
Abstract
Abstract A hydraulic cement composition comprising hydraulic cement and a copolymer of 60 to 85 mol % of an alpha,beta-unsaturated dicarboxylic acid and 40 to 15 mol % of an olefin or a water-soluble salt thereof, said copolymer having a number average molecular weight of 300 to 10,000 and containing not more than 10% by weight of a high-molecular-weight polymer having a molecular weight of at least 20,000.
Inventors
- 👤 Tadao Natsuume
- 👤 Hiromitsu Kadono
- 👤 Yoshiaki Miki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:19
CPC Classifications
C; C04; C04B; C04B24/00; C04B24/24; C04B24/26; C04B24/2664
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
91 words
A hydraulic cement composition comprising hydraulic cement and a water soluble copolymer selected from the group consisting of (1) water soluble copolymer and (2) water soluble salts of copolymers, said copolymer having more than 60 up to 85 mole % of an alpha, beta-unsaturated dicarboxylic acid and less than 40 down to 15 mole % of an olefin, and said copolymer having a number average molecular weight of 300 to 10,000 and containing not more than 10% by weight of a high-molecular-weight polymer having a molecular weight of at least 20,000.
Claim 2
Dependent Claim
91 words
A hydraulic cement composition comprising hydraulic cement and a water soluble copolymer selected from the group consisting of (1) water soluble copolymer and (2) water soluble salts of copolymers, said copolymer having more than 60 up to 85 mole % of an alpha, beta-unsaturated dicarboxylic acid and less than 40 down to 15 mole % of an olefin, and said copolymer having a number average molecular weight of 300 to 10,000 and containing not more than 10% by weight of a high-molecular-weight polymer having a molecular weight of at least 20,000.
Claim 3
Dependent Claim
30 words
The composition of claim 1 wherein the proportion of the copolymer or its water-soluble salt is from 0.01 to 3% by weight based on the weight of the hydraulic cement.
Claim 4
Dependent Claim
30 words
The composition of claim 2 wherein the water-soluble salt is an alkaline metal salt, an alkaline earth metal salt, an ammonium salt, an amine salt or a combination of these.
Claim 5
Dependent Claim
28 words
The composition of claim 2 wherein the water-soluble salt is a combination of 1 equivalent of an alkali metal and 0.05 to 1 equivalent of a calcium salt.
Claim 6
Dependent Claim
26 words
The composition of claim 1 wherein the copolymer has a weight average molecular weight (Mw)/number average molecular weight (Mn) ratio (Mw/Mn) of not more than 2.0.
Claim 7
Dependent Claim
14 words
The composition of claim 1 wherein the olefin has 2 to 10 carbon atoms.
Claim 8
Dependent Claim
22 words
The composition of claim 6 wherein the olefin is an aliphatic olefin or a cycloolefin each having 4 to 6 carbon atoms.
Claim 9
Dependent Claim
31 words
The composition of claim 1 wherein the copolymer is composed of 65 to 80 mole % of the alpha, beta-unsaturated dicarboxylic acid and 35 to 20 mole % of the olefin.
Claim 10
Dependent Claim
24 words
The composition of claim 1 which further comprises an aromatic sulfonic acid salt-type admixture, a melaminesulfonic acid/formaldehyde condensate-type admixture, and/or a ligninsulfonic acid-type admixture.
Claim 11
Dependent Claim
31 words
The composition of claim 9 wherein the proportion of the additional admixture is 5 to 95% based on the total weight of the copolymer or its water-soluble salt and the admixture.
Claim 12
Dependent Claim
26 words
The hydraulic cement composition of claim 1 wherein the dicarboxylic acid is at least one of maleic acid, itaconic acid, citraconic acid and the anhydrides thereof.
Claim 13
Dependent Claim
16 words
The hydraulic cement composition of claim 1 wherein the dicarboxylic acid is maleic acid or anhydride.
Claim 14
Dependent Claim
19 words
The hydraulic cement composition of claim 1 wherein the olefin is C 5 aliphatic olefin or C 5 cycloolefin.
Claim 15
Dependent Claim
27 words
The hydraulic cement composition of claim 1 wherein the copolymer or its water soluble salt is present in an amount of 0.05 to 1 percent by weight.
Claim 16
Dependent Claim
20 words
The hydaulic cement composition of claim 1 wherein said copolymer has a number average molecular weight of 1,000 to 8,000.
Claim 17
Dependent Claim
84 words
A hydraulic cement composition comprising hydraulic cement and 0.05 to 1% by weight of a water soluble copolymer of 65 to 80 mole percent of maleic anhydride or acid and 35 to 20 mole percent of a C 5 aliphatic olefin or C 5 cycloolefin or water soluble salt thereof, said copolymer having a number average molecular weight of 1000 to 8000 and containing not more than 10% by weight of a high molecular weight polymer having a molecular weight of at least 20,000.
Claim 18
Dependent Claim
84 words
A hydraulic cement composition comprising hydraulic cement and 0.05 to 1% by weight of a water soluble copolymer of 65 to 80 mole percent of maleic anhydride or acid and 35 to 20 mole percent of a C 5 aliphatic olefin or C 5 cycloolefin or water soluble salt thereof, said copolymer having a number average molecular weight of 1000 to 8000 and containing not more than 10% by weight of a high molecular weight polymer having a molecular weight of at least 20,000.
Claim 19
Dependent Claim
77 words
A hydraulic cement composition comprising hydraulic cement and a water soluble salt of a copolymer having more than 60 up to 85 mole percent of an alpha, beta-unsaturated dicarboxylic acid and less than 40 down to 15 mole percent of an olefin, said copolymer having a number average molecular weight of 300 to 10,000 and containing not more than 10 percent by weight of a high molecular weight polymer having a molecular weight of at least 20,000.
Claim 20
Dependent Claim
77 words
A hydraulic cement composition comprising hydraulic cement and a water soluble salt of a copolymer having more than 60 up to 85 mole percent of an alpha, beta-unsaturated dicarboxylic acid and less than 40 down to 15 mole percent of an olefin, said copolymer having a number average molecular weight of 300 to 10,000 and containing not more than 10 percent by weight of a high molecular weight polymer having a molecular weight of at least 20,000.
Claim 21
Dependent Claim
22 words
The hydraulic cement composition of claim 17 wherein the olefin is an aliphatic olefin or a cycloolefin each having 4-6 carbon atoms.
Claim 22
Dependent Claim
29 words
The hydraulic cement composition of claim 17 wherein the copolymer is composed of 65-80 moles percent of the alpha, beta-unsaturated dicarboxylic acid and 35-20 moles percent of the olefin.
Claim 23
Dependent Claim
20 words
The hydraulic cement composition of claim 17 wherein said copolymer has a number average molecular weight of 1,000 to 8,000.
Claim 24
Dependent Claim
26 words
The hydraulic cement composition of claim 17 wherein the dicarboxylic acid is at least one of maleic acid, itaconic acid, citraconic acid and the anhydrides thereof.
Claim 25
Dependent Claim
16 words
The hydraulic cement composition of claim 17 wherein the dicarboxylic acid is maleic acid or anhydride.
Claim 26
Dependent Claim
22 words
The hydraulic cement composition of claim 17 wherein said copolymer is present in an amount of 0.05 to 1 percent by weight.
Claim 27
Dependent Claim
93 words
A hydraulic cement admixture composed of a water soluble copolymer selected from the group consisting of (1) water soluble copolymer and (2) water soluble salts of copolymers, said copolymer having more than 60 up to 85 mole percent of an alpha, beta-unsaturated dicarboxylic acid and less than 40 down to 15 mole percent of an olefin, and said copolymer having a number average molecular weight of from 300 to 10,000 and containing not more than 10 percent by weight of a high molecular weight polymer having a molecular weight of at least 20,000.
Claim 28
Dependent Claim
93 words
A hydraulic cement admixture composed of a water soluble copolymer selected from the group consisting of (1) water soluble copolymer and (2) water soluble salts of copolymers, said copolymer having more than 60 up to 85 mole percent of an alpha, beta-unsaturated dicarboxylic acid and less than 40 down to 15 mole percent of an olefin, and said copolymer having a number average molecular weight of from 300 to 10,000 and containing not more than 10 percent by weight of a high molecular weight polymer having a molecular weight of at least 20,000.
Claim 29
Dependent Claim
21 words
The hydraulic cement admixture of claim 24 wherein the said copolymer has a number average molecular weight of 1,000 to 8,000.
References Cited (Backward Citations)
US4015993A
Cited
US4042407A
Cited
US4125410A
Cited
JPS58135168A
Cited
JPS6016850A
Cited
JPS6016851A
Cited
US4586960A
Cited
JPS6042265A
Cited
US4746365A
Cited
US4792360A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-03-05 | 1993-09-04 | 1994-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-05 | 1997-09-04 | 1998-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-05 | 2001-09-04 | 2002-03-06 | $7700.00 | Window Closed / Lapsed |