Highly transparent and high-strength silica gel for cardiovascular model and preparation method thereof
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A high-strength silicone, cardiovascular technology, applied in the field of silicone materials, can solve the problems of high transparency, poor tear resistance, and unusability
Active Publication Date: 2022-02-11
上海璞临医疗科技有限公司
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[0004] Among the existing silicone products on the market, potting rubber products have high transparency but poor tear strength, mold silicone products have high mechanical properties but poor transparency, and high-temperature vulcanized silicone rubber products have good Excellent transparency and mechanical properties, but the curing process requires extremely high temperatures, so it cannot be used for 3D printing molds that are not resistant to high temperatures
At present, there is no silicone product that has the characteristics of high transparency, high mechanical properties, and low-temperature curing
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Embodiment 1
[0035] Embodiment 1: A high-transparency, high-strength silica gel for a cardiovascular model, comprising the following components in parts by weight:
[0036] 80 parts of hydroxyl-terminated polyphenylsiloxane;
[0044] Such as figure 1 As shown, it is prepared by the following steps:
[0045] Step 1: Add phenyl silicone oil, methyl tributylketoxime silane, leveling agent, organotin catalyst, and chain extender into the star-shaped stirred tank. The internal pressure of the stirred tank is negative pressure 0.2MPa. Stir evenly at a high speed;
[0046] Step 2, adding hydroxyl-terminated polyphenylsiloxane and dihydroxypolydimethylsiloxane to the star-shaped stirred tank to disperse ...
Embodiment 2
[0050] Embodiment 2: A high-transparency, high-strength silica gel for a cardiovascular model, which differs from Embodiment 1 in that it includes the following components in parts by weight:
[0051] 85 parts of hydroxyl-terminated polyphenylsiloxane;
[0053] 18 parts of methyl tributylketoxime silane;
[0054] 25 parts of dihydroxypolydimethylsiloxane;
[0055] Leveling agent 1.5 parts;
[0056] 2.5 parts of organotin catalyst;
[0057] 4 parts of chain extender;
[0058] 9 parts of fumed silica.
Embodiment 3
[0059] Embodiment 3: A high-transparency, high-strength silica gel for a cardiovascular model, which differs from Embodiment 1 in that it includes the following components in parts by weight:
[0060] 90 parts of hydroxyl-terminated polyphenylsiloxane;
[0061] 30 parts of phenyl silicone oil;
[0062] 20 parts of methyl tributyl ketoxime silane;
[0063] 30 parts of dihydroxypolydimethylsiloxane;
[0064] Leveling agent 2 parts;
[0065] 2 parts of organotin catalyst;
[0066] 3 parts of chain extender;
[0067] 8 parts of fumed silica.
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Abstract
The invention discloses a high-transparency and high-strength silica gel for a cardiovascular model and a preparation method thereof, relates to the technical field of silica gel materials, and solves the problem that the silica gel sold on the market cannot simultaneously take into account the properties of room temperature curing, high transparency, and high strength. Wherein, the high-transparency high-strength silica gel includes the following components in parts by weight: 80-100 parts of hydroxyl-terminated polyphenylsiloxane; 20-40 parts of phenyl silicone oil; 15-25 parts of methyl tributylketoximosilane; 20-40 parts of dihydroxy polydimethylsiloxane; 1-3 parts of leveling agent; 1-3 parts of organic tin catalyst; 1-5 parts of chain extender; 5-10 parts of fumed silica. In the present invention, the light transmittance of the silica gel reaches 98% by adding high-refractive index phenyl silicone oil and fumed silica with a particle size below 100 nm; the silica gel in the present invention can be cured at room temperature, and has high tensile strength, Advantages of high tear strength, low temperature curing and high light transmittance.
Description
technical field [0001] The invention relates to the technical field of silica gel materials, more specifically, it relates to a high-transparency, high-strength silica gel for cardiovascular models and a preparation method thereof. Background technique [0002] Interventional surgery is an emerging and highly difficult operation, and doctors need a long period of study and training to master it. During the training process, a model that simulates the human blood vessel environment is needed to perform the operation. Human blood vessels have complex multi-level branches, all of which are hollow and curved at angles, and the thinnest part is only about 1mm in diameter. Traditional injection molding and blow molding processes cannot restore this special structure due to the limitations of molds. [0003] In order for the doctor to see the position of the catheter during the surgical training process, the material used for the vascular model must have good transparency. In orde...
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