Special polyvinyl alcohol butyral resin for 3D printing and preparation method thereof
A polyvinyl butyral resin and 3D printing technology, which is applied in the field of 3D printing, can solve the problems of reducing the mechanical properties and optical transparency of materials, affecting the mechanical properties of 3D printing products, and increasing the risk of compatibility. Conducive to wire processing, excellent mechanical properties, and the effect of reducing content
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Embodiment 1
[0035]With 80g degree of polymerization 600, polyvinyl alcohol (PVA) that alcoholysis degree is 99% is dissolved into 8% aqueous solution, and 16g concentration is 30% hydrochloric acid and 0.1g emulsifier maleic anhydride di-sec-octyl sulfonate Sodium acid was added into the solution, stirred evenly, and the temperature of the above-mentioned PVA solution was lowered to 5°C. Under the condition of stirring, 40 g of butyraldehyde was slowly added into the reaction solution within 30 minutes, kept warm for 40 minutes, and the temperature was slowly raised to 60° C. within 5 hours, and the temperature was maintained for 120 minutes to carry out the reaction. After the reaction is finished, lye is added to neutralize the reaction solution until the pH value is 4 and maintained for 30 minutes. Wash the above reaction product with deionized water at 50°C for 3 times, then with deionized water at room temperature for 2 times, adjust the pH value to 11 with lye, and keep it for 30 mi...
Embodiment 2
[0037] With 50g degree of polymerization 1000, alcoholysis degree is 98% polyvinyl alcohol (PVA) and 50g polymerization degree 500, alcoholysis degree is 97% polyvinyl alcohol mixes, dissolves and becomes 10% aqueous solution, and 14.3g concentration is 35% hydrochloric acid and 0.3 g of emulsifier maleic anhydride di-sec-octyl sodium sulfonate were added to the solution, stirred evenly, and the temperature of the above-mentioned PVA solution was lowered to 10° C. Under the condition of stirring, 45g of butyraldehyde was slowly added in the reaction solution within 30 minutes, kept warm for 30 minutes, and the temperature was slowly raised to 70° C. within 3 hours, and the temperature was maintained for 80 minutes to carry out the reaction. After the reaction is finished, lye is added to neutralize the reaction solution until the pH value is 3 and kept for 40 minutes. The above reaction product was washed 4 times with deionized water at 55°C, then washed 3 times with normal te...
Embodiment 3
[0039] With 150g degree of polymerization 300, polyvinyl alcohol (PVA) that alcoholysis degree is 98% is dissolved into 15% aqueous solution, and 50g concentration is 30% hydrochloric acid and 0.5g emulsifier maleic anhydride di-sec-octyl sulfonate Sodium acid was added into the solution, stirred evenly, and the temperature of the above-mentioned PVA solution was lowered to 20°C. Under the condition of stirring, 60g of butyraldehyde was slowly added into the reaction solution within 30 minutes, kept warm for 30 minutes, and the temperature was slowly raised to 80° C. within 5 hours, and the temperature was maintained for 20 minutes to carry out the reaction. After the reaction is finished, lye is added to neutralize the reaction solution until the pH value is 5 and kept for 30 minutes. Wash the above reaction product with deionized water at 60°C for 3 times, then with deionized water at room temperature for 3 times, adjust the pH value to 11 with lye, and keep it for 40 minute...
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