Patent US5676678A successfully refreshed from Google Patents.
US4347174A
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Cement compositions
Assignee: Kuraray Co Ltd
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Filing: 1981-04-21
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Granted: 1982-08-31
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Expires: 2001-04-21
Abstract
Abstract A cement composition which comprises a filler, a binder to be used in admixture with the filler, and a curing agent for polymerizing the binder, which is characterized by that the binder comprises, based on the total weight of the binder, 20-100% by weight of (A) a free-radical polymerizable monomer of the following formula: <IMAGE> wherein R is a hydrogen atom or a methyl group and X is an organic residue having 1-48 carbon atoms, and 0-80% by weight of (B) a mono-, di- or tri-functional free-radical polymerizable monomer which is copolymerizable with the above monomer (A) is disclosed. By using the above binder, the filler is firmly bonded with each other and gives a cured product having high compressive strength and abrasion resistance. The cement composition is especially useful as dental restorative materials.
Inventors
- 👤 Yoshinori Nagase
- 👤 Kyoichiro Shibatani
- 👤 Junichi Yamauchi
- 👤 Ikuo Omura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:08
CPC Classifications
C; C04; C04B; C04B26/00; C04B26/02; C04B26/04; A; A61; A61K; A61K6/00; A61K6/30; A61K6/80; A61K6/884; A61K6/887; A61K6/891; A61K6/893; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/34; C08F20/36; Y; Y10; Y10S; Y10S522/00; Y10S522/908
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
102 words
In a cement composition which comprises (a) a filler, (b) a binder to be used in admixture with the filler, and (c) a curing agent for polymerizing the binder, the cement composition which is characterized by that said binder comprises, based on the total weight of the binder, 20-100% by weight of (A) a free-radical polymerizable monomer of the following formula: ##STR19## wherein R is a hydrogen atom or a methyl group and X is an organic residue having 1-48 carbon atoms, and 0-80% by weight of (B) a mono-, di- or tri-functional free-radical polymerizable monomer which is copolymerizable with monomer (A).
Claim 2
Dependent Claim
102 words
In a cement composition which comprises (a) a filler, (b) a binder to be used in admixture with the filler, and (c) a curing agent for polymerizing the binder, the cement composition which is characterized by that said binder comprises, based on the total weight of the binder, 20-100% by weight of (A) a free-radical polymerizable monomer of the following formula: ##STR19## wherein R is a hydrogen atom or a methyl group and X is an organic residue having 1-48 carbon atoms, and 0-80% by weight of (B) a mono-, di- or tri-functional free-radical polymerizable monomer which is copolymerizable with monomer (A).
Claim 3
Dependent Claim
27 words
The cement composition according to claim 1 in which X is an aliphatic, aromatic or alicyclic hydrocarbon residue the backbone of which may be interrupted by oxygen.
Claim 4
Dependent Claim
18 words
The cement composition according to claim 2 in which X is an alkylene group having 6-20 carbon atoms.
Claim 5
Dependent Claim
12 words
The cement composition according to claim 3 in which X is ##STR20##
Claim 6
Dependent Claim
16 words
The cement composition according to claim 3 in which X is --(CH 2 ) 6 --.
Claim 7
Dependent Claim
36 words
The cement composition according to claim 1 in which the monomer (B) is a monomer of the formula: ##STR21## wherein Y is an organic residue having 1-50 carbon atoms, and m is 1, 2 or 3.
Claim 8
Dependent Claim
23 words
The cement composition according to claim 6 in which m is 1, and Y is an aliphatic hydrocarbon residue having 1-4 carbon atoms.
Claim 9
Dependent Claim
15 words
The cement composition according to claim 7 in which the monomer (B) is methyl methacrylate.
Claim 10
Dependent Claim
22 words
The cement composition according to claim 6 in which m is 2, and Y is an alkylene group having 2-8 carbon atoms.
Claim 11
Dependent Claim
16 words
The cement composition according to claim 9 in which the monomer (B) is neopentyl glycol dimethacrylate.
Claim 12
Dependent Claim
32 words
The cement composition according to claim 6 in which m is 2, and Y is CH 2 CH 2 (OCH 2 CH 2 ) n wherein n is an integer of 0-13.
Claim 13
Dependent Claim
16 words
The cement composition according to claim 11 in which the monomer (B) is triethylene glycol dimethacrylate.
Claim 14
Dependent Claim
26 words
The cement composition according to claim 6 in which m is 2, and Y is a residue of a bisphenol A derivative having 15-25 carbon atoms.
Claim 15
Dependent Claim
14 words
The cement composition according to claim 13 in which the monomer (B) is 2,2'-bis[p-(γ-methacryloxy-β-hydroxypropoxy)-phenyl]propane.
Claim 16
Dependent Claim
22 words
The cement composition according to claim 6 in which m is 2 and Y is ##STR22## wherein p is 1 or 2.
Claim 17
Dependent Claim
14 words
The cement composition according to claim 15 in which the monomer (B) is 1,2-bis[3-(meth)acryloxy-2-hydroxypropyl]-ethane.
Claim 18
Dependent Claim
27 words
The cement composition according to claim 1 in which the binder comprises 20-95% by weight of the monomer (A) and 80-5% by weight of the monomer (B).
Claim 19
Dependent Claim
134 words
In a dental filling material which comprises 60-85% by weight of (a) a silane treated inorganic filler, 40-15% by weight of (b) a binder to be used in admixture with the inorganic filler, the %'s being based on the combined weight of the inorganic filler and the binder, and (c) a curing agent for polymerizing the binder, the dental filling material which is characterized by that the binder comprises, based on the total weight of the binder, 20-100% by weight of (A) a free-radical polymerizable monomer of the following formula: ##STR23## wherein R is a hydrogen atom or a methyl group and X is an organic residue having 1-48 carbon atoms, and 0-80% by weight of (B) a mono-, di- or tri-functional free radical polymerizable monomer which is copolymerizable with the above monomer (A).
Claim 20
Dependent Claim
134 words
In a dental filling material which comprises 60-85% by weight of (a) a silane treated inorganic filler, 40-15% by weight of (b) a binder to be used in admixture with the inorganic filler, the %'s being based on the combined weight of the inorganic filler and the binder, and (c) a curing agent for polymerizing the binder, the dental filling material which is characterized by that the binder comprises, based on the total weight of the binder, 20-100% by weight of (A) a free-radical polymerizable monomer of the following formula: ##STR23## wherein R is a hydrogen atom or a methyl group and X is an organic residue having 1-48 carbon atoms, and 0-80% by weight of (B) a mono-, di- or tri-functional free radical polymerizable monomer which is copolymerizable with the above monomer (A).
Claim 21
Dependent Claim
28 words
The dental filling material according to claim 18 in which X is an aliphatic, aromatic or alicyclic hydrocarbon residue the backbone of which may be interrupted by oxygen.
Claim 22
Dependent Claim
19 words
The dental filling material according to claim 19 in which X is an alkylene group having 6-20 carbon atoms.
Claim 23
Dependent Claim
13 words
The dental filling material according to claim 20 in which X is ##STR24##
Claim 24
Dependent Claim
15 words
The dental filling material according to claim 20 X is --(CH 2 ) 6 --.
Claim 25
Dependent Claim
37 words
The dental filling material according to claim 18 in which the monomer (B) is a monomer of the formula: ##STR25## wherein Y is an organic residue having 1-50 carbon atoms, and m is 1, 2 or 3.
Claim 26
Dependent Claim
24 words
The dental filling material according to claim 23 in which m is 1, and Y is an aliphatic hydrocarbon residue having 1-4 carbon atoms.
Claim 27
Dependent Claim
16 words
The dental filling material according to claim 24 in which the monomer (B) is methyl methacrylate.
Claim 28
Dependent Claim
23 words
The dental filling material according to claim 23 in which m is 2, and Y is an alkylene group having 2-8 carbon atoms.
Claim 29
Dependent Claim
17 words
The dental filling material according to claim 26 in which the monomer (B) is neopentyl glycol dimethacrylate.
Claim 30
Dependent Claim
33 words
The dental filling material according to claim 23 in which m is 2, and Y is CH 2 CH 2 (OCH 2 CH 2 ) n wherein n is an integer of 0-13.
Claim 31
Dependent Claim
17 words
The dental filling material according to claim 28 in which the monomer (B) is triethylene glycol dimethacrylate.
Claim 32
Dependent Claim
27 words
The dental filling material according to claim 23 in which m is 2, and Y is a residue of a bisphenol A derivative having 15-25 carbon atoms.
Claim 33
Dependent Claim
15 words
The dental filling material according to claim 30 in which the monomer (B) is 2,2'-bis[p-(γ-methacryloxy-β-hydroxypropoxy)phenyl]propane.
Claim 34
Dependent Claim
23 words
The dental filling material according to claim 23 in which m is 2, and Y is ##STR26## wherein p is 1 or 2.
Claim 35
Dependent Claim
15 words
The dental filling material according to claim 32 in which the monomer (B) is 1,2-bis[3-(meth)acryloxy-2-hydroxypropoxy]ethane.
Claim 36
Dependent Claim
28 words
The dental filling material according to claim 18 in which the binder comprises 20-95% by weight of the monomer (A) and 80-5% by weight of the monomer (B).
References Cited (Backward Citations)
US3066112A
Cited
US3926906A
Cited
US3721644A
Cited
US3751399A
Cited
US3845009A
Cited
US3862920A
Cited
US4098918A
Cited
US3907865A
Cited
US3931678A
Cited
US4258164A
Cited
US4259117A
Cited
US4259075A
Cited
US4182035A
Cited
US4065627A
Cited
US4222780A
Cited
US4177563A
Cited
US4302381A
Cited
US4279833A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-30 | 1986-03-01 | 1986-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-30 | 1990-03-01 | 1990-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-30 | 1994-03-01 | 1994-08-31 | $7700.00 | Window Closed / Lapsed |