US5227413A
Expired / Lapsed
US
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Cements from β-dicarbonyl polymers
Assignee: 3M Co
•
Filing: 1992-02-27
•
Granted: 1993-07-13
•
Expires: 2012-02-27
Abstract
Abstract The invention provides novel ionomer polymers and cements comprising β-dicarbonyl groups. The invention has particular utility as filling materials for restoring teeth and for cementing inlays and crowns into place in the tooth, providing a base or a lining in a tooth cavity, and as adhesives or sealants. The invention provides ionomer cement systems that achieve increased resistance to water absorption and solubility.
Inventors
- 👤 Sumita B. Mitra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:36
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/50; A61K6/20; A61K6/30; A61K6/80; A61K6/884; A61K6/887; A61K6/889
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
37 words
A system for forming a cement, comprising (a) a polymer comprising one or more pendent β-dicarbonyl groups, capable of undergoing a setting reaction in the presence of water and a reactive powder, and (b) a reactive powder.
Claim 2
Independent Claim
37 words
A system for forming a cement, comprising (a) a polymer comprising one or more pendent β-dicarbonyl groups, capable of undergoing a setting reaction in the presence of water and a reactive powder, and (b) a reactive powder.
Claim 3
Dependent Claim
22 words
A cement system according to claim 1, wherein said polymer further contains one or more polymerizable groups capable of crosslinking said polymer.
Claim 4
Dependent Claim
28 words
A cement system according to claim 1, wherein said one or more β-dicarbonyl groups are selected from the group consisting of β-ketoester groups, β-diester groups, and β-diketone groups.
Claim 5
Dependent Claim
17 words
A cement system according to claim 1, wherein said one or more β-dicarbonyl groups are β-ketoester groups.
Claim 6
Dependent Claim
33 words
A cement system according to claim 1, wherein said polymer further comprises an ionic group which is also capable of undergoing a setting reaction in the presence of water and a reactive powder.
Claim 7
Dependent Claim
16 words
A cement system according to claim 5, wherein said ionic group is an alkenoic acid group.
Claim 8
Dependent Claim
30 words
A cement system according to claim 1, further comprising (c) a polyalkenoic acid which is capable of undergoing a setting reaction in the presence of water and a reactive powder.
Claim 9
Dependent Claim
23 words
A cement system according to claim 1, further comprising water, present in a form that does not prematurely begin to set the system.
Claim 10
Dependent Claim
36 words
A cement system according to claim 8, wherein said water is present in the form of an aqueous solution of said polymer, and said powder is provided as a separate component for mixing with said solution.
Claim 11
Dependent Claim
34 words
A cement system according to claim 8, wherein said polymer and said reactive powder are present as an anhydrous mixture and said water is provided as a separate component for mixing with said mixture.
Claim 12
Dependent Claim
26 words
A cement system according to claim 8, wherein said polymer and said reactive powder are each separately present as viscous pastes for mixing with each other.
Claim 13
Dependent Claim
19 words
A cement system according to claim 2, further comprising polymerization initiator which is capable of initiating the crosslinking reaction.
Claim 14
Dependent Claim
16 words
A cement system according to claim 12, wherein said polymerization initiator is a visible-light-induced polymerization initiator.
Claim 15
Dependent Claim
23 words
A cement system according to claim 1, further comprising a cosolvent which is capable of forming a homogeneous aqueous solution with said polymer.
Claim 16
Dependent Claim
14 words
A cement system according to claim 14, wherein said cosolvent is a copolymerizable cosolvent.
Claim 17
Dependent Claim
11 words
A cement system according to claim 15, further comprising polymerization initiator.
Claim 18
Dependent Claim
12 words
A cement system according to claim 1, further comprising a protonic acid.
Claim 19
Independent Claim
57 words
A method for adhering to or coating hard tissue, comprising the steps of: (a) applying to said hard tissue a cement comprising: (i) a polymer comprising one or more pendent β-dicarbonyl groups, capable of undergoing a setting reaction in the presence of water and a reactive powder, and (ii) a reactive powder, and (b) hardening said cement.
Claim 20
Independent Claim
57 words
A method for adhering to or coating hard tissue, comprising the steps of: (a) applying to said hard tissue a cement comprising: (i) a polymer comprising one or more pendent β-dicarbonyl groups, capable of undergoing a setting reaction in the presence of water and a reactive powder, and (ii) a reactive powder, and (b) hardening said cement.
Claim 21
Dependent Claim
21 words
A method according to claim 18, wherein said polymer further comprises one or more polymerizable groups capable of crosslinking said polymer.
Claim 22
Dependent Claim
16 words
A method according to claim 18, wherein said one or more β-dicarbonyl groups are β-ketoester groups.
Claim 23
Dependent Claim
32 words
A method according to claim 18, wherein said polymer further comprises an ionic group which is also capable of undergoing a setting reaction in the presence of water and a reactive powder.
Claim 24
Dependent Claim
31 words
A method according to claim 18, wherein said cement further comprises a polyalkenoic acid which is capable of undergoing a setting reaction in the presence of water and a reactive powder.
Claim 25
Dependent Claim
25 words
A method according to claim 18, wherein said cement further comprises water, present in a form that does not prematurely begin to set the system.
Claim 26
Dependent Claim
21 words
A method according to claim 19, wherein said cement further comprises polymerization initiator which is capable of initiating the crosslinking reaction.
Claim 27
Dependent Claim
25 words
A method according to claim 18, wherein said cement further comprises a cosolvent which is capable of forming a homogeneous aqueous solution with said polymer.
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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) | 1996-07-12 | 1997-01-11 | 1997-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-12 | 2001-01-11 | 2001-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-12 | 2005-01-11 | 2005-07-13 | $7700.00 | Window Closed / Lapsed |