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Dental composition

A composition and dental technology, applied in the direction of dentistry, dental preparations, dental prostheses, etc., can solve the problems of undisclosed dental compositions, etc., and achieve the effects of improving polymerization efficiency, increasing curing speed, and high efficiency

Inactive Publication Date: 2016-11-09
DENTSPLY DETREY GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no disclosure of dental compositions or any compositions comprising particulate fillers and / or solvents

Method used

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Experimental program
Comparison scheme
Effect test

no. 2 approach

[0069] According to a second embodiment, X is Si and X' is Ge according to the following formula (IV):

[0070] R 1 R 2 R 3 Si(CO)GeR 4 R 5 R 6

[0071] (IV)

[0072] In formulas (I), (II), (III) and (IV), R 1 , R 2 , R 3 , R 4 , R 5 and R 6 The moieties may be the same or different and independently represent hydrocarbon groups having 1 to 20 carbon atoms, preferably 2 to 8 carbon atoms and more preferably 2 to 6 carbon atoms.

[0073] The hydrocarbon group may be an alkyl group, cycloalkyl group, cycloalkylalkyl group, aralkyl group or aryl group.

[0074] Alkyl group can be straight chain or branched C 1-20 Alkyl group, usually C 1-8 Alkyl group. C 1-6 Examples of alkyl groups may include linear or branched chain alkyl groups having 1 to 6 carbon atoms, preferably 1 to 4 carbon atoms, such as methyl, ethyl, n-propyl, isopropyl, n- Butyl, isobutyl, sec-butyl, tert-butyl, n-pentyl, isopentyl and n-hexyl.

[0075] The cycloalkyl group may be a C3-20 cycloalkyl...

specific example

[0085]

[0086] A preferred group of compounds are symmetrical compounds of formula (I), wherein X and X' represent Ge, R 1 = R 4 , R 2 = R 5 , and R 3 = R 6 , and R 1 , R 2 , R 3 , which may be the same or different, independently represent a C1-6 alkyl group or a phenyl group.

[0087] A further preferred group of compounds are symmetrical compounds of formula (I), wherein X and X' are Si, R 1 = R 4 , R 2 = R 5 , and R 3 = R 6 , and R 1 , R 2 , R 3 , which may be the same or different, independently represent a C1-6 alkyl group or a phenyl group.

[0088] Specific examples of the compound of formula (I) include bis(triphenylgermyl)methanone, bis(triethylgermyl)methanone and bis(trimethylgermyl)methanone.

[0089] Compounds of formula (I) may be known compounds which may be prepared according to published procedures. Alternatively, compounds of formula (I) can be prepared according to the following scheme (Johannesen R et al., J. Chem. Soc. Perkin Trans. ...

Embodiment 1

[0126]

[0127] Preparation of Di(germyl)ketone (DGK)

[0128] The procedure for the synthesis of DGK (Scheme 1 ) given in [Macromol. Rapid Commun. 2010, 31, 473-478] was used. To a solution of triphenylgermanium hydride (1 g, 3.28 mmol) in dry THF (3 mL) was added n-BuLi (2.5M in hexane, 1.31 mL, 3.28 mmol) at -23°C. After 15 min at -23 °C, ethyl formate (in CaH 2 freshly distilled, 0.58 mL, 1.64 mmol), the reaction mixture was allowed to warm at room temperature over 15 minutes, then quenched with aqueous hydrochloric acid (1M). The organic phase was separated and the aqueous phase was extracted three times with diethyl ether. The combined organic phases were dried over sodium sulfate, filtered and concentrated to obtain a white powder. crude reaction mixture 1 H NMR analysis showed a bis(triphenylgermyl)methanol / bis(triphenylgermyl)methyl formate ratio of 3:7. The latter was dissolved in dry THF (13 mL) and cooled to 0°C. Then add LiAlH all at once 4 (0.17 g, 4.37...

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Abstract

Photocurable dental composition comprising (a) one or more radical-polymerizable monomers, and (b) 0.1 to 7.0 percent by weight based on the total weight of radical polymerizable monomers in the composition of a compound of the following formula (I): R1R2R3X(CO)X'R4R5R6 (I) wherein X and X' which may be the same or different, independently represent Si or Ge, R1, R2, R3, R4, R5, and R6, which may be the same or different, independently represent a hydrocarbon group having 1 to 20 carbon atoms, whereby any two hydrocarbon groups of R1, R2, R3, R4, R5, and R6 may be bonded to each other and form together with either X, X' or the moiety X(CO)X' to which they are attached a 3 to 12- membered heterocyclic ring, whereby any of the hydrocarbon group or the heterocyclic ring may contain one or more keto groups other than the keto group of the X(CO)X' moiety, or be substituted by on or more groups selected from halogen atoms, a cyano group, an amino group or a hydroxy group, and in case the hydrocarbon group or the heterocyclic ring contains an alkylene chain or an alkenylene chain, one or more carbon atoms in the alkylene chain or alkenylene chain may be replaced by an oxygen atom, a sulfur atom, an amide group, an ester group, a urethane group or an NH group.

Description

field of invention [0001] The present invention relates to a dental composition containing a specific photoinitiator compound useful for initiating free radical polymerization of free radically polymerizable monomers contained in a photocurable dental composition. The invention also relates to the use of said photoinitiator for the preparation of photocurable dental compositions. [0002] The dental composition of the present invention has increased polymerization efficiency and curing speed, so that the mechanical properties of the cured dental composition can be improved. Background of the invention [0003] Dental restorations generally involve photocurable dental compositions containing free radically polymerizable resins. Photocuring of dental compositions involves photoinitiator systems that generate free radicals upon exposure to visible light. Free radicals can generally be generated in either of two ways: [0004] (1) The photoinitiator compound undergoes excitat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K6/00
CPCA61K6/62
Inventor 约阿基姆·E·克莱马克西米利安·迈尔J·拉勒韦J·P·福西尔F·莫莱-萨瓦里
Owner DENTSPLY DETREY GMBH
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