Preparation of low-shrinkage Bis-GMA-base-free hyperbranched polyamine-ester flowing resin for dental restoration
A hyperbranched polymer-based dental technology, applied in the field of preparation of dental restorative materials, can solve the problems of increased polymerization shrinkage rate of total content and no further exploration, and achieves reduced polymerization shrinkage rate, excellent fluidity, and ease of clinical use. effect of operation
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Embodiment 1
[0048] The preparation method of low-shrinkage non-Bis-GMA-based dental restoration hyperbranched polyurethane-ester fluid resin, the specific process is as follows:
[0049] (1) Preparation of silanized inorganic filler:
[0050] The inorganic filler is prepared by surface modification treatment. The specific method of surface modification treatment is: add 50g inorganic filler to 600mL cyclohexane, stir and react in an oil bath at 40°C for 20min, then add 5.5mL n-propylamine and 3.3 mLγ-(methacryloyloxy)propyltrimethyloxysilane was stirred and reacted at 70°C for 20 minutes. During the reaction, the stirring speed was kept at 650r / min; Rinse with ethanol several times, filter, and then dry in a vacuum oven at 60°C for 24 hours to obtain silanized inorganic fillers;
[0051] Wherein, the inorganic filler is a mixture of micron silica (particle diameter is 1 μm) and nano silica (particle diameter is 20nm) with a weight ratio of 3:1;
[0052] (2) Preparation of modified hyper...
Embodiment 2
[0063] The preparation method of low-shrinkage non-Bis-GMA-based dental restoration hyperbranched polyurethane-ester fluid resin, the specific process is as follows:
[0064] (1) Preparation of silanized inorganic filler:
[0065] The inorganic filler is prepared by surface modification treatment. The specific method of surface modification treatment is: add 50g inorganic filler to 600mL cyclohexane, stir and react in an oil bath at 40°C for 20min, then add 5.5mL n-propylamine and 3.3 mLγ-(methacryloyloxy)propyltrimethyloxysilane was stirred and reacted at 70°C for 20 minutes. During the reaction, the stirring speed was kept at 650r / min; Rinse with ethanol several times, filter, and then dry in a vacuum oven at 60°C for 24 hours to obtain silanized inorganic fillers;
[0066] Wherein, the inorganic filler is a mixture of micron silica (particle diameter is 1 μm) and nano silica (particle diameter is 20nm) with a weight ratio of 3:1;
[0067] (2) Preparation of modified hyperbr...
Embodiment 3
[0083] The preparation method of low-shrinkage non-Bis-GMA-based dental restoration hyperbranched polyurethane-ester fluid resin, the specific process is as follows:
[0084] (1) Preparation of silanized inorganic filler:
[0085] The inorganic filler is prepared by surface modification treatment. The specific method of surface modification treatment is: add 50g inorganic filler to 600mL cyclohexane, stir and react in an oil bath at 30°C for 20min, then add 5.5mL n-propylamine and 3.3 mL of vinyltriethoxysilane was stirred and reacted at 60°C for 30min. During the reaction, the stirring speed was kept at 650r / min; Drying in a vacuum oven at 60°C for 24 hours to obtain a silanized inorganic filler;
[0086] Wherein, the inorganic filler is a mixture of micron silica (particle diameter is 2 μm) and nano silica (particle diameter is 60nm) with a weight ratio of 4:1;
[0087] (2) Preparation of modified hyperbranched polyamine-ester:
[0088] (1) Mix pentaerythritol, N,N-dihydr...
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