3D printing photosensitive resin based on DLP type photocuring and preparation method thereof
A 3D printing and photosensitive resin technology, applied in the direction of additive processing, etc., can solve the problems of low printing accuracy, insufficient toughness, and high printing cost
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[0044] In order to obtain the above-mentioned 3D printing photosensitive resin, the present invention also provides a related preparation method, which includes the following steps:
[0045] Prepare modified prepolymer matrix resin;
[0046] Preparation of modified nano silicon dioxide;
[0047] Add the modified nano-silica to the active diluent, and mix it with a high-speed ultrasonic disperser for 0.5h at room temperature to prepare a mixed diluent, store it away from light, and store it for later use;
[0048] Preparation of light-curing 3D printing photosensitive resin: at room temperature, add the modified prepolymer matrix resin, photoinitiator, mixed diluent, and additives to the round bottom flask in sequence according to the mass ratio, and stir with an electric stirrer for 1h-1.5 h to mix evenly, pour it into a container and seal it, then place it in an ultrasonic cleaner and vibrate for 0.5h-1h, take it out and let it stand for defoaming, and then you can get a lig...
Embodiment 1
[0059] The preparation process of the DLP-based light-curing 3D printing photosensitive resin in this embodiment is as follows:
[0060] At room temperature, weigh 35 parts of modified polyurethane acrylate, 5 parts of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, 59.5 parts of modified nano-silica and Mixture of reactive diluents (30 parts of trimethylolpropane triacrylate, 24.5 parts of tripropylene glycol diacrylate and 5 parts of modified nano-silica), 0.45 parts of diethylhydroxylamine, 0.05 parts of Deqian Add the 432 leveling agent to the round bottom flask in turn, stir with an electric mixer for 1 hour until the mixture is uniform, pour it into the container and seal it, then place it in an ultrasonic cleaner and shake it for 0.5 hours, take it out and let it stand for defoaming, and then the photocuring product can be obtained. 3D printing photosensitive resin.
Embodiment 2
[0062] The preparation process of the DLP-based light-curing 3D printing photosensitive resin in this embodiment is as follows:
[0063] At room temperature, weigh 40 parts of modified polyurethane acrylate, 6 parts of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, 53.4 parts of modified nano-silica and A mixture of reactive diluents (containing 20 parts of pentaerythritol triacrylate, 29.4 parts of tripropylene glycol diacrylate and 4 parts of modified nano-silica), 0.55 parts of diethylhydroxylamine, and 0.05 parts of TEGO410 leveling agent were added in sequence The round-bottomed flask was stirred with an electric stirrer for 1 hour until it was evenly mixed, poured into a container and sealed, then placed in an ultrasonic cleaner and vibrated for 0.5 hours, and then left to defoam after taking it out to obtain the photocurable 3D printing photosensitive resin.
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