Patent US4923905A successfully refreshed from Google Patents.
US4923905A
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Light curable dental composition
Assignee: NOF Corp
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Filing: 1988-02-26
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Granted: 1990-05-08
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Expires: 2008-02-26
Abstract
Abstract A light curable dental composition is provided. The composition comprises an ethylenic unsaturated compound and a light polymerization initiator. The light polymerization initiator is a combination of an α-diketone and a polyperoxy ester containing a benzophenone group and represented by the general formula (I) of: ##STR1## wherein R 1 and R 1 ' represent a tertiary alkyl group or a tertiary aralkyl group and R 2 and R 2 ' represent a hydrogen atom, a tertiary alkoxy group or a tertiary aralkyloxy group.
Inventors
- 👤 Eiichi Masuhara
- 👤 Yoshinori Kadoma
- 👤 Takeo Matsumoto
- 👤 Takeshi Komai
- 👤 Eiichi Yamada
- 👤 Osamu Nakachi
- 👤 Godo Irukayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:43
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/46; C08F2/48; C08F2/50; A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887; Y; Y10; Y10S; Y10S522/00; Y10S522/908
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
213 words
A light curable dental paste comprising an ethylenic unsaturated compound and a light polymerization initiator, said light polymerization initiator comprising a combination of an α-diketone and a tetraperoxy ester containing a benzophenone group and represented by the following general formula (I) of: ##STR5## wherein R 1 and R' 1 each represents the same or different group and stands for a tertiary alkyl group having 4 to 8 carbon atoms or a tertiary aralkyl group having 9 to 12 carbon atoms and R 2 and R' 2 each represents the same or different atom or group and stands for a tertiary alkoxy group having 4 to 8 carbon atoms or a tertiary aralkyloxy group having 9 to 12 carbon atoms, said dental paste further comprising fine particles of an inorganic filler and a high polymer surface active agent, said high polymer surface active agent being a copolymer which is prepared by copolymerizing an unsaturated monomer represented by the following general formual (II) of: ##STR6## wherein R 1 is a hydrogen atom or a methyl group, R 2 is an alkyl group having 1 to 4 carbon atoms or a phenyl group, and n is an integer of 1 to 15; with an unsaturated ester copolymerizable with said monomer represented by the general formula (II).
Claim 2
Dependent Claim
213 words
A light curable dental paste comprising an ethylenic unsaturated compound and a light polymerization initiator, said light polymerization initiator comprising a combination of an α-diketone and a tetraperoxy ester containing a benzophenone group and represented by the following general formula (I) of: ##STR5## wherein R 1 and R' 1 each represents the same or different group and stands for a tertiary alkyl group having 4 to 8 carbon atoms or a tertiary aralkyl group having 9 to 12 carbon atoms and R 2 and R' 2 each represents the same or different atom or group and stands for a tertiary alkoxy group having 4 to 8 carbon atoms or a tertiary aralkyloxy group having 9 to 12 carbon atoms, said dental paste further comprising fine particles of an inorganic filler and a high polymer surface active agent, said high polymer surface active agent being a copolymer which is prepared by copolymerizing an unsaturated monomer represented by the following general formual (II) of: ##STR6## wherein R 1 is a hydrogen atom or a methyl group, R 2 is an alkyl group having 1 to 4 carbon atoms or a phenyl group, and n is an integer of 1 to 15; with an unsaturated ester copolymerizable with said monomer represented by the general formula (II).
Claim 3
Dependent Claim
34 words
A composition as claimed in claim 1, wherein 0.01 to 10 parts, by weight, of said tetraperoxy ester containing a benzophenone group is added to 100 parts, by weight, of said ethylenic unsaturated compound.
Claim 4
Dependent Claim
29 words
A composition as claimed in claim 1, wherein 0.01 to 10 parts, by weight, of said α-diketone is added to 100 parts, by weight, of said ethylenic unsaturated compound.
Claim 5
Dependent Claim
18 words
A composition as claimed in claim 1, wherein said ethylenic unsaturated compound is a derivative of methacrylic acid.
Claim 6
Dependent Claim
39 words
A composition as claimed in claim 4, wherein said derivative of methacrylic acid is selected from the group consisting of triethyleneglycol dimethacrylate, hexamethyleneglycol dimethacrylate, 2,2-bis[4-(3-methacryloxy-2-hydroxypropoxy)phenyl]propane, di-2-methacryloxyethyl-2,2,4-trimethylhexamethylene dicarbamate, 1,2-bis(3-methacryloxy-2-hydroxypropoxy)ethane, tetramethylolmethane trimethacrylate, 2,2-bis(4-methacryloxyethoxyphenyl)propane, polypropyleneglycol dimethacrylate, methyl methacrylate, 2,2-bis(4-methacryloxypolyethoxyphenyl)propane and mixtures thereof.
Claim 7
Dependent Claim
31 words
A composition as claimed in claim 1, wherein said tetraperoxy ester containing a benzophenone group is selected from the group consisting of 3,3',4,4'-tetra-(t-butylperoxycarbonyl)benzophenone, 3,3',4,4'-tetra-(t-amylperoxycarbonyl)benzophenone, 3,3',4,4'-tetra-(t-hexylperoxycarbonyl)benzophenone, 3,3',4,4'-tetra-(t-octylperoxycarbonyl)benzophenone, 3,3',4,4'-tetra-(cumylperoxycarbonyl)benzophenone, 3,3',4,4'-tetra-(p-isopropylcumylperoxycarbonyl)benzophenone, and mixtures thereof.
Claim 8
Dependent Claim
27 words
A composition as claimed in claim 1, wherein said α-diketone is an α-diketone having a peak absorption at a wavelength of from 400 nm to 700 nm.
Claim 9
Dependent Claim
24 words
A composition as claimed in claim 7, wherein said α-diketone is selected from the group consisting of acenaphthenequinone, 9,10-phenanthrenequinone, camphorquinone, β-naphthoquinone and mixtures thereof.
Claim 10
Dependent Claim
15 words
A composition as claimed in claim 1, further comprising fine particles of an inorganic filler.
Claim 11
Dependent Claim
33 words
A composition as claimed in claim 9, wherein said inorganic filler is selected from the group consisting of apatite, soda-lime glass, quartz, silica, borosilicate glass, alumina, barium oxide, zirconium glass and mixtures thereof.
Claim 12
Dependent Claim
49 words
A composition as claimed in claim 9, wherein said inorganic filler comprises silica and said silica has an average particle size of from 1 to 100 millimicrons and is treated to be hydrophobic with a treating agent selected from the group consisting of dimethyldichlorosilane, hexamethyldisilazane, octyltrimethoxysilane and silicone oils.
Claim 13
Dependent Claim
43 words
A composition as claimed in claim 1, comprising 30 to 80 parts, by weight, of said ethylenic unsaturated compound, 10 to 50 parts, by weight, of said fine particles of said inorganic filler and 0.1 to 20 parts, by weight, of said copolymer.
Claim 14
Dependent Claim
51 words
A composition as claimed in claim 1, wherein said unsaturated monomer represented by the general formula (II) is selected from the group consisting of methoxyethyl acrylate, methoxyethyl methacrylate, methoxydiethyleneglycol acrylate, methoxydiethyleneglycol methacrylate, methoxytetraethyleneglycol acrylate, methoxytetraethyleneglycol methacrylate, isobutoxypolyethyleneglycol acrylate, isobutoxypolyethyleneglycol methacrylate, methoxypolyethyleneglycol acrylate, methoxypolyethyleneglycol methacrylate, phenoxypolyethyleneglycol acrylate, phenoxypolyethyleneglycol methacrylate and mixtures thereof.
Claim 15
Dependent Claim
35 words
A composition as claimed in claim 1, wherein said unsaturated ester copolymerizable with said monomer represented by the general forumla (II) is selected from the group consisting of acrylic esters, methacrylic esters and mixtures thereof.
Claim 16
Dependent Claim
44 words
A composition as claimed in claim 14, wherein said unsaturated ester copolymerizable with said monomer represented by the general formula (II) is selected from the group consisting of methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, butyl acrylate, butyl methacrylate and mixtures thereof. 02
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