Ultraviolet-cured silicone rubber for DIW (direct ink writing) 3D (three-dimensional) printing and preparation method thereof
A technology for curing silicone rubber and ultraviolet light, applied in the direction of additive processing, etc., can solve the problems of reducing the high and low temperature resistance of silicone rubber, expensive photosensitive platinum catalyst, and difficult to achieve mechanical properties, etc. Precision controllability, low toxicity effect
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[0042] Example 1:
[0043] The preparation method of UV-curable silicone rubber for DIW 3D printing, the steps are as follows:
[0044] Take 30 g of vinyl-terminated polydimethylsiloxane with a viscosity of 20,000 mpas, 1.5 g of side-chain mercaptopropyl polysiloxane, 10 g of fumed silica H2000, and 3 g of hydroxyl-terminated polysiloxane with a viscosity of 2,000 mPa.s. 5 g of methyl MQ silicone resin and 0.1 g of diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide (TPO) were mixed at 25° C. for 30 minutes to obtain ultraviolet light-cured silicone rubber.
Example Embodiment
[0045] Example 2:
[0046] The preparation method of UV-curable silicone rubber for DIW 3D printing, the steps are as follows:
[0047] Take 30 g of vinyl-terminated polydimethylsiloxane with a viscosity of 20,000 mpas, 1.5 g of side-chain mercaptopropyl polysiloxane, 8 g of fumed silica H2000, 3 g of diatomaceous earth, and an ether group-containing polysiloxane with a viscosity of 2000 mPa.s. 2 g of siloxane, 5 g of methyl MQ silicone resin, 0.1 g of diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide (TPO), mixed at 25° C. for 30 minutes to obtain UV-curable silicone rubber.
Example Embodiment
[0048] Example 3:
[0049] The preparation method of UV-curable silicone rubber for DIW 3D printing, the steps are as follows:
[0050] Take 40g of vinyl-terminated polydimethylsiloxane with viscosity of 25000mpas, 1.5g of side chain mercaptopropyl polysiloxane, 10g of fumed silica, 7g of vinyl MQ silicone resin, and epoxy-containing epoxy resin with viscosity of 2000mPa.s 3 g of base polysiloxane and 0.1 g of benzoin dimethyl ether were mixed at 25° C. for 30 minutes to obtain a UV-curable silicone rubber.
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