A kind of polyurethane photosensitive resin for clinical customized medical equipment and its preparation and application
A photosensitive resin and medical device technology, applied in the direction of additive processing, etc., can solve the problems of weak molecular chain interaction, unsatisfactory resin mechanical strength, unfavorable industrial production, etc., and achieve excellent hydrolysis resistance, step operation, and composition Effects with few types
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Embodiment 1
[0037] (1) Under the condition of nitrogen protection, 51.05g of propylene carbonate (Aladdin reagent) was added to a 250ml four-necked flask with a condensing device, the temperature was raised to 120°C, and 46.82g of Isophor Ketodiamine (Aladdin reagent) was added into the four-neck flask, and after the addition was completed, it was incubated at 120°C for 8 hours to obtain a transparent viscous product, which was poured out of the four-necked flask while it was hot. Weigh 70g of the product in a 500ml beaker and dissolve it with 100ml of methylene chloride to obtain a colorless transparent liquid, add 300ml of n-hexane to extract the product from methylene chloride to obtain a milky white viscous liquid, and remove the n-hexane by rotary evaporation at 60°C. Obtain non-isocyanate polyurethane prepolymer (NIPU), propylene carbonate (PC), isophorone diamine (IPDA) and the infrared contrast figure of the product non-isocyanate polyurethane prepolymer after the two reaction fig...
Embodiment 2
[0041] (1) Under the condition of nitrogen protection, 102.09g of propylene carbonate (Aladdin reagent) was added to a 500ml four-necked flask with a condensing device, the temperature was raised to 120°C, and 93.64g of Isophoronediamine (Aladdin reagent) was added into the four-necked flask, and after the addition was completed, it was incubated at 120°C for 8 hours to obtain a transparent viscous product, which was poured out of the four-necked flask while it was hot. Weigh 80g of the product in a 500ml beaker and dissolve it with 100ml of dichloromethane to obtain a colorless transparent liquid, then extract the product from the dichloromethane with 300ml of n-hexane to obtain a milky white viscous liquid, and remove the n-hexane by rotary evaporation at 60°C , to obtain non-isocyanate polyurethane prepolymer.
[0042] (2) Take 60g of the above-mentioned non-isocyanate polyurethane prepolymer in a 500ml three-necked flask, dissolve it with 150ml of dehydrated methylene chlo...
Embodiment 3
[0045] (1) Under the condition of nitrogen protection, 153.16g of propylene carbonate (Aladdin reagent) was added to a 500ml four-necked flask with a condensing device, the temperature was raised to 120°C, and 140.46g of Isophor Ketodiamine (Aladdin reagent) was added into the four-neck flask, and after the addition was completed, it was incubated at 120°C for 8 hours to obtain a transparent viscous product, which was poured out of the four-necked flask while it was hot. Weigh 80g of the product in a 500ml beaker and dissolve it with 100ml of dichloromethane to obtain a colorless transparent liquid, then extract the product from the dichloromethane with 300ml of n-hexane to obtain a milky white viscous liquid, and remove the n-hexane by rotary evaporation at 60°C , to obtain non-isocyanate polyurethane prepolymer.
[0046] (2) Take 60g of the above-mentioned non-isocyanate polyurethane prepolymer in a 500ml three-necked flask, dissolve it with 150ml of dehydrated methylene chl...
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