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Composite resin with low contraction stress containing dimethacrylate with long oxyalkyl chain for dental department and preparation method of composite resin

A technology of acrylate and composite resin, which is applied in dental preparations, dentistry, and dental prostheses. It can solve the problems of bad smell, limited application, poor mechanical properties, etc., and achieve the reduction of polymerization volume shrinkage and shrinkage stress. Polymerization High reactivity and excellent mechanical properties

Active Publication Date: 2018-09-28
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, small molecular mercapto groups usually have an unpleasant smell, and the mechanical properties of mercapto-vinyl resins are inferior to those of methacrylate resins, thus limiting their application in dental restoration materials.

Method used

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  • Composite resin with low contraction stress containing dimethacrylate with long oxyalkyl chain for dental department and preparation method of composite resin
  • Composite resin with low contraction stress containing dimethacrylate with long oxyalkyl chain for dental department and preparation method of composite resin
  • Composite resin with low contraction stress containing dimethacrylate with long oxyalkyl chain for dental department and preparation method of composite resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A4CH 3 Synthesis

[0033] Add 6.92g of polypropylene glycol dioxirane methyl ether (n=4) and 4.50g of methacrylic acid, 0.11g of N,N-dimethylbenzylamine, 0.02g in a round bottom flask equipped with a magnet The hydroquinone was refluxed and stirred at 100°C for 3 hours, cooled to room temperature, and then the reaction product was purified by acid-base washing.

[0034] The product was characterized by infrared and NMR:

[0035] 1 H-NMR (400MHz, CCl 3 D): δ6.07(s), δ5.52(s), δ4.95(s), δ4.14-3.37(m), δ1.88(s), δ1.06(m).

[0036] FT-IR: ν(cm -1 ) 3442, 2973, 2933, 2878, 1724, 1636, 1451, 1380, 1157, 745.

Embodiment 2

[0038] A9CH 3 Synthesis

[0039] Add 13.14g of polypropylene glycol dioxirane methyl ether (n=9) and 6.00g of methacrylic acid, 0.38g of N,N-dimethylbenzylamine, 0.19g in a round bottom flask equipped with a magnet The hydroquinone was refluxed and stirred at 60°C for 24 hours, cooled to room temperature, and then the reaction product was purified by acid-base washing.

[0040] The product was characterized by infrared and NMR:

[0041] 1 H-NMR (400MHz, CCl 3 D): δ6.06(s), δ5.51(s), δ4.94(s), δ4.13-3.41(m), δ1.88(s), δ1.06(m).

[0042] FT-IR: ν(cm -1 ) 3454, 2969, 2928, 2873, 1714, 1633, 1449, 1377, 1171, 745.

Embodiment 3

[0045] A low shrinkage stress dental composite resin containing long alkoxy chain bis(meth)acrylate, wherein the mass percentage of each component is: bisphenol A dimethacrylate glycidyl ether ester 12.325%, A4CH 3 6.1625%, triethylene glycol dimethacrylate 6.1625%, camphorquinone 0.175%, dimethylaminoethyl methacrylate 0.175%, silicon dioxide 75%, in the preparation process, bisphenol A dimethacrylate Glycidyl ether ester, A4CH 3and triethylene glycol dimethacrylate are mixed uniformly to prepare a resin matrix, and then the resin matrix is ​​mixed with camphorquinone and dimethylaminoethyl methacrylate to prepare a resin matrix and a photoinitiator mixture, and finally the mixture is mixed with Silica is mixed uniformly to prepare composite resin. This embodiment and comparative example photocured product performance are as follows:

[0046]

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Abstract

The invention discloses composite resin with low contraction stress containing dimethacrylate with a long oxyalkyl chain for the dental department and a preparation method of the composite resin. Thecomposite resin comprises 20-50 weight parts of a mixture containing methacrylate resin matrix and a light initiating system, and 50-80 weight parts of an inorganic filler. In the mixture containing the methacrylate resin matrix and the light initiating system, the weight of the methacrylate resin matrix accounts for 96%-99.4% of that of the mixture, and the weight of the light initiating system accounts for 0.6%-4% of that of the mixture. The composite resin with low contraction stress containing dimethacrylate with the long oxyalkyl chain for the dental department has relatively low system contraction rate and contraction stress, and the phenomenon of repair failure caused by marginal microleakage, repairing body falling and the like due to polymerization contraction and contraction stress when the composite resin is used for repairing the dental cavity can be reduced.

Description

technical field [0001] The invention belongs to the field of materials for dental restoration, and in particular relates to a low-shrinkage stress dental composite resin containing long alkoxy chain bis(meth)acrylate and a preparation method thereof. Background technique [0002] Dental caries is a common bacterial dental disease with high incidence and wide distribution. If it is not treated in time, it will develop into pulpitis and periapical periodontitis, which will seriously affect the health of patients. And effective treatment. At present, the main method for treating dental caries is filling treatment, that is, the carious tissue is firstly removed to prepare a cavity, and after the cavity is sterilized, the filling material is used for filling and repairing. [0003] Monomers containing methacrylate structure are indispensable organic components of light-curing dental restoration materials. At present, commercial dental methacrylate-based composite resins usually...

Claims

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Application Information

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IPC IPC(8): A61K6/083A61K6/00
CPCA61K6/75A61K6/76A61K6/77A61K6/887C08L33/08C08L33/10
Inventor 何经纬刘芳罗淑珍
Owner SOUTH CHINA UNIV OF TECH
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