Patent US4259117A successfully refreshed from Google Patents.
US4259117A
Expired / Lapsed
US
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Dental filling material
Assignee: Kuraray Co Ltd
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Filing: 1978-08-25
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Granted: 1981-03-31
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Expires: 1998-08-25
Abstract
Abstract A dental filling agent is provided, which contains a phosphoric or phosphonic acid ester compound containing at least one polymerizable functional group and either a group of the formula <IMAGE> or a group of the formula <IMAGE> or a high molecular weight compound obtainable by polymerizing the compound either alone or as a comonomer unit. This agent has a high bonding affinity for the tooth and enjoys prolonged stability in wet environments.
Inventors
- 👤 Junichi Yamauchi
- 👤 Eiichi Masuhara
- 👤 Nobuo Nakabayashi
- 👤 Kyoichiro Shibatani
- 👤 Tooru Wada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:13
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/091; A; A61; A61K; A61K6/00; A61K6/70; A61K6/71; A61K6/76; A61L; A61L24/00; A61L24/04; A61L24/06; A61L27/00; A61L27/14; A61L27/16; Y; Y10; Y10S; Y10S528/00; Y10S528/92
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
181 words
A dental filling material of improved affinity for the tooth, consisting essentially of: (1) an acrylic or methacrylic acid ester compound, (2) a curing agent and (3) a dentally acceptable filler as a mixed material in combination with a phosphoric and/or phosphonic acid ester compound selected from the group consisting of compounds of formulas (A), (B), (C), (D), (E) and (F) in an amount of 2 to 50 weight percent based on said acrylic or methacrylic acid ester compound, said formulas being: ##STR34## wherein Ra, Ra', Ra" and Ra'" are hydrogen or methyl; Rb, Rb', Rb" and Rb"' are ##STR35## wherein m is an integer of 1 to 5 or ##STR36## wherein l is an integer of 1 to 3; Y is a hydrocarbon residue containing 1 to 30 carbon atoms, which residue may be substituted by hydroxyl, alkoxy or halogen; Rc and Rc' are X or OX where X is a hydrocarbon residue containing 1 to 30 carbon atoms, which may be substituted by hydroxyl, halogen, amino or carboxyl; ##STR37## where Z has the same meaning as X, and ##STR38##
Claim 2
Dependent Claim
181 words
A dental filling material of improved affinity for the tooth, consisting essentially of: (1) an acrylic or methacrylic acid ester compound, (2) a curing agent and (3) a dentally acceptable filler as a mixed material in combination with a phosphoric and/or phosphonic acid ester compound selected from the group consisting of compounds of formulas (A), (B), (C), (D), (E) and (F) in an amount of 2 to 50 weight percent based on said acrylic or methacrylic acid ester compound, said formulas being: ##STR34## wherein Ra, Ra', Ra" and Ra'" are hydrogen or methyl; Rb, Rb', Rb" and Rb"' are ##STR35## wherein m is an integer of 1 to 5 or ##STR36## wherein l is an integer of 1 to 3; Y is a hydrocarbon residue containing 1 to 30 carbon atoms, which residue may be substituted by hydroxyl, alkoxy or halogen; Rc and Rc' are X or OX where X is a hydrocarbon residue containing 1 to 30 carbon atoms, which may be substituted by hydroxyl, halogen, amino or carboxyl; ##STR37## where Z has the same meaning as X, and ##STR38##
Claim 3
Dependent Claim
36 words
The dental filing material of claim 1, wherein said phosphoric or phosphonic acid ester compound is a compound having formula (G) or (H): ##STR39## wherein Ra, Ra', Rb and Rb' are as defined in claim 1.
Claim 4
Dependent Claim
18 words
The dental filling material of claim 1, wherein said phosphoric acid ester compound is 2-methacryloxyethyl phenyl phosphoric acid.
Claim 5
Dependent Claim
18 words
The dental filling material of claim 1, wherein said phosphonic acid ester compound is 2-methacryloxyethyl phenyl phosphonic acid.
Claim 6
Dependent Claim
17 words
The dental filling material of claim 2, wherein said phosphoric acid ester compound is bis-(2-methacryloxyethyl) acid phosphate.
Claim 7
Dependent Claim
36 words
The dental filling material of claim 1, 2, 3, 4 or 5, wherein said acrylic or methacrylic acid ester compound is present in an amount of 10 to 50 weight % based on said mixed material.
Claim 8
Dependent Claim
47 words
The dental filling material of claim 6, wherein said methacrylic acid ester compound is selected from the group consisting of bisphenol-A diglycidyl methacrylate, bisphenol-A dimethacrylate, 2,2'-bis(4-methacryloxyethoxyphenyl) propane, 2,2'-bis(4-methacryloxypropoxyphenyl) propane, xylene glycol dimethacrylate, neopentyl glycol dimethacrylate, ethylene glycol dimethacrylate, diethylene glycol dimethacrylate, triethylene glycol dimethacrylate, and trimethylolpropane trimethacrylate.
Claim 9
Dependent Claim
23 words
The dental filling material of claim 1, 2, 3, 4 or 5, wherein said curing agent is one which cures at room temperature.
Claim 10
Dependent Claim
20 words
The dental filling material of claim 1, 2, 3, 4, or 5, wherein said curing agent is an ultraviolet sensitizer.
Claim 11
Dependent Claim
33 words
The dental filling material of claim 1, 2, 3, 4 or 5, wherein said filler is selected from the group consisting of silica powder, aluminum oxide powder and quartz powder which are silinated.
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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) | 1984-03-30 | 1984-09-29 | 1985-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-30 | 1988-09-29 | 1989-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-30 | 1992-09-29 | 1993-03-31 | $7700.00 | Window Closed / Lapsed |