Methyl acrylate (MA)-methyl methacrylate (MMA) copolymer-base denture base material as well as preparation method and application thereof

A technology of methyl methacrylate and methyl acrylate, applied in the field of prosthodontics, can solve problems such as unsatisfactory effects, and achieve the effects of improved residual monomer content, good application prospects, and improved solubility

Inactive Publication Date: 2011-05-25
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In recent years, in the field of modification of PMMA matrix materials, the method of adding SiO2, TiO2 and other nanoparticles to the PMMA matrix for compounding and using montmorillonite for intercalation compounding can significantly enhance certain properties of the matrix. In particular, the strength of the material has been significantly improved, but the effect in improving its toughness and impact strength is not very satisfactory

Method used

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  • Methyl acrylate (MA)-methyl methacrylate (MMA) copolymer-base denture base material as well as preparation method and application thereof
  • Methyl acrylate (MA)-methyl methacrylate (MMA) copolymer-base denture base material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Mix 1wt% of MA and 99wt% of MMA monomers and add them to a three-necked flask (the total amount of monomers is 60mL), and at the same time add 1.8g of hydroxyethyl cellulose (HEC) and 0.074g to 170ml of deionized water Sodium dodecylbenzene sulfonate (SDBS), after initial stirring, pour it into a three-necked flask and continue stirring at low speed. Pass N 2 After 40 minutes of protection, the temperature was increased to 90°C, and the inert atmosphere was kept continuously, and 0.4 g of initiator BPO was added to initiate polymerization. After 9 hours of reaction, the reaction system was cooled and filtered, and the filtered product was washed repeatedly. Vacuum drying to constant weight to obtain the corresponding crude copolymerized product, and then dissolve the crude copolymerized product P (MMA-co-MA) in n-butanol at 50-80°C and cool to -20°C to precipitate PMMA homopolymer. Filter, wash, add methanol to the filtrate with stirring until methanol / total alcohol...

Embodiment 2

[0027] (1) Mix 1.5wt% of MA and 98.5wt% of MMA monomers and add them to a three-necked flask (the total amount of monomers is 50mL), and at the same time add 1.8g of hydroxyethyl cellulose (HEC) and 250ml of deionized water 0.074g sodium dodecylbenzene sulfonate (SDBS), pour it into a three-neck flask after initial stirring, and continue stirring at low speed. After 40 minutes of argon protection, the temperature was increased to 90° C., and an inert atmosphere was continuously maintained, and 0.4 g of initiator azobisisobutyronitrile was added to initiate polymerization. After reacting for 5 hours, the reaction system was cooled and filtered, and the filtered product was washed repeatedly. Vacuum drying to constant weight to obtain the corresponding crude copolymerized product, and then dissolve the crude copolymerized product P (MMA-co-MA) in n-butanol at 50-80°C and cool to -20°C to precipitate PMMA homopolymer. Filter, wash, add methanol to the filtrate with stirring until...

Embodiment 3

[0031] (1) Mix 3wt% of MA and 97wt% of MMA monomers and add them to a three-necked flask (the total amount of monomers is 50mL), and at the same time add 1.8g of calcium hydroxyphosphate and 0.074g of dodecyl sulfuric acid to 200ml of deionized water Sodium, after initial stirring, pour it into a three-necked flask and continue stirring at low speed. After 40 minutes of helium protection, the temperature was raised to 90°C, and the inert atmosphere was continuously maintained, and 0.4 g of initiator azobisisoheptonitrile was added to initiate polymerization. After reacting for 3 hours, the reaction system was cooled and filtered, and the filtered product was washed repeatedly. Vacuum drying to constant weight to obtain the corresponding crude copolymerized product, and then dissolve the crude copolymerized product P (MMA-co-MA) in n-butanol at 50-80°C and cool to -20°C to precipitate PMMA homopolymer. Filter, wash, add methanol to the filtrate with stirring until methanol / tota...

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Abstract

The invention discloses a methyl acrylate (MA)-methyl methacrylate (MMA) copolymer-base denture base material as well as a preparation method and application thereof. The preparation method comprises the following steps: toughening a first monomer-MMA by a second monomer-MA; copolymerizing the two monomers in a suspension polymerization manner, wherein the MA monomer and the MMA monomer form an oil phase, the amount of the MA monomer is 1-10wt% of the mass of the oil phase, and the amount of the MMA monomer is 90-99wt% of the mass of the oil phase; evenly mixing the obtained copolymerization product with the heat-cured liquid for denture acrylic; and finally heating for curing. The MA-MMA copolymer-base denture base material is applied to the field of a denture base material; and compared with a purer PMMA (polymethylmethacrylate) material, the denture base material has the advantages of greatly improved bending strength, greatly improved impact strength and slightly improved tensile strength, thus successfully solving the problems of the PMMA denture base material in mechanical strength and particularly in impact strength.

Description

Technical field [0001] The present invention belongs to the field of dental prosthetics. More specifically, it relates to a denture base material made of copolymerized and toughened polymethyl methacrylate (PMMA), particularly using PMMA as the matrix and methyl acrylate (MA) as the first Two-monomer copolymerization toughened denture base material and its preparation method and application. Background technique [0002] With the advancement of society and the improvement of living standards, people's requirements for aesthetic restoration are becoming stronger and higher and higher for oral materials. At the same time, the persistence of teeth has changed the spectrum of oral diseases. According to calculations, the incidence of dental caries in our country is 37%, with an average of 2.47 dental caries per person. Based on a population of 1.2 billion, there are nearly 500 million dental caries in the country, and the total number of dental caries is more than 1 billion. Among a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K6/083C08F220/14C08F2/18
Inventor 郑俊萍王雷胡玉美苏强
Owner TIANJIN UNIV
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