Patent US5028638A successfully refreshed from Google Patents.
US5028638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hybrid plastic filling material
Assignee: Bayer AG
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Filing: 1990-01-22
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Granted: 1991-07-02
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Expires: 2010-01-22
Abstract
Abstract In a dental composite containing a polymerizable (meth)acrylic compound, photoinitiator, accelerator, inorganic filler and conventional auxiliaries, the improvement wherein the composite by weight comprises about (a) 10-50% of at least one monomer which contains at least 2 polymerizable (meth)acrylic acid groups, (b) 5-80% of a glass or a glass ceramic which has an average particle size of between about 0.1 and 10 μm and has been post-treated with γ-methacryloxypropyltrimethoxysilane up to a carbon content of between about 0.5 and 2.5% by weight, (c) 2-10% of a surface-treated microfiller and (d) 0.1-5% of a photoactivator consisting of a mixture of camphorquinone and p-dialkylaminobenzenesulphonamide. The composition has a long pot life and good surface color when cured.
Inventors
- 👤 Renate Heid
- 👤 Jens Winkel
- 👤 Heiko Herold
- 👤 Peter Schwabe
- 👤 Werner Finger
- 👤 Wolfgang Podszun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:50
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887; Y; Y10; Y10S; Y10S522/00; Y10S522/908
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
121 words
In a dental composite containing a polymerizable (meth)acrylic compound, photoinitiator, accelerator, inorganic filler and conventional auxiliaries, the improvement wherein the composite by weight consisting essentially of about (a) 10-50% of at least one monomer selected from the group comprising triethylene glycol dimethacrylate, tetraethylene glycol dimethacrylate, 1,12-dodecanediol dimethacrylate, 1,6-hexanediol dimethacrylate, diethylene glycol dimethacrylate, 2,2-bis(p-(2'-hydroxy-3'-methacryloyloxypropoxy) phenyl)propane, 2,2-bis(p-(2'-methacryloyloxyethyoxy)phenyl)propane, trimethylolpropane tri(meth)acrylate, bis-(meth)acryloyloxymethyl)tricyclo-[5.2.1.0 2 .6 ] decane, 1,3-di((meth) acryloyloxypropyl)-1,1,3,3-tretramethyl-disiloxane and 1,3-bis(3-(meth)acryloyloxyethylcarbamoyloxypropyl)-1,1,3,3-tetramethyldisiloxane, (b) 5-80% of a glass or a glass ceramic which has an average particle size of between about 0.1 and 10 um and has been post-treated with y-methacryloxypropyltrimethoxysilane up to a carbon content of between about 0.5 and 2.5% by weight, and (c) 0.1-5% of a photoactivator consisting of a mixture of camphorquinone and p-dialkylaminobenzenesulphonamide.
Claim 2
Dependent Claim
121 words
In a dental composite containing a polymerizable (meth)acrylic compound, photoinitiator, accelerator, inorganic filler and conventional auxiliaries, the improvement wherein the composite by weight consisting essentially of about (a) 10-50% of at least one monomer selected from the group comprising triethylene glycol dimethacrylate, tetraethylene glycol dimethacrylate, 1,12-dodecanediol dimethacrylate, 1,6-hexanediol dimethacrylate, diethylene glycol dimethacrylate, 2,2-bis(p-(2'-hydroxy-3'-methacryloyloxypropoxy) phenyl)propane, 2,2-bis(p-(2'-methacryloyloxyethyoxy)phenyl)propane, trimethylolpropane tri(meth)acrylate, bis-(meth)acryloyloxymethyl)tricyclo-[5.2.1.0 2 .6 ] decane, 1,3-di((meth) acryloyloxypropyl)-1,1,3,3-tretramethyl-disiloxane and 1,3-bis(3-(meth)acryloyloxyethylcarbamoyloxypropyl)-1,1,3,3-tetramethyldisiloxane, (b) 5-80% of a glass or a glass ceramic which has an average particle size of between about 0.1 and 10 um and has been post-treated with y-methacryloxypropyltrimethoxysilane up to a carbon content of between about 0.5 and 2.5% by weight, and (c) 0.1-5% of a photoactivator consisting of a mixture of camphorquinone and p-dialkylaminobenzenesulphonamide.
Claim 3
Dependent Claim
104 words
A dental composite according to claim 1, by weight consisting essentially of about (a) 10-30% of at least one monomer selected from the group comprising triethylene glycol dimethacrylate, tetraethylene glycol dimethacrylate, 1,12-dodecanediol dimethacrylate, 1,6-hexanediol dimethyacrylate, diethylene glycol dimethacrylate, 2,2bis(p-(2'-hydroxy-3'-methacryloyloxypropoxy)phenyl)propane, 2,2-bis(p-(2'-methacryloyloxyethoxy)phenyl)propane, trimethylolpropane tri(meth)acrylate, bis-(meth)acryloyloxymethyl)-tricyclo-[5.2.1.0 2 .6 ]decane, 1,3-di((meth)acryloyloxypropyl)-1,1,3,3-tretramethyldisiloxane and 1,3-bis(3-(meth)acryloyloxyethylcarbamoyloxypropyl)-1,1,3,3-tetramethyldisiloxane, (b) 40-75% of a glass or a glass ceramic which has an average particle size of between about 0.1 and 10 um and has been post-treated with y-methacryloxypropyltrimethoxysilane up to a carbon content of between about 0.5 and 2.5% by weight, and (c) 0.1-5% of a photoactivator consisting of a mixture of camphorquinone and p-dialkylaminobenzenesulphonamide.
References Cited (Backward Citations)
US4089763A
Cited
EP0060911A1
Cited
EP0073995A1
Cited
US4437836A
Cited
US4544359A
Cited
EP0166009A1
Cited
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