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

Inactive Publication Date: 2018-08-24
ZHEJIANG DECENT PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the above applications, PVB resins are all improved by adding auxiliary resins to improve their processing performance, and the addition of a large amount of auxiliary resins reduces the mechanical properties and optical transparency of the material, and increases the risk of compatibility
At the same time, a large amount of solvents or plasticizers are also added to the above applications to improve the use or processing performance. Due to the high temperature during the 3D printing process, the volatilization of solvents and plasticizers will produce odor and smoke, which is harmful to the production and processing environment and 3D printing. The environment of the printing process has a greater impact, and the addition of solvents and plasticizers to the product will also affect the mechanical properties and environmental impact resistance of 3D printed products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

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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Abstract

The invention belongs to the technical field of 3D printing, and relates to special polyvinyl alcohol butyral resin for 3D printing. The viscosity of the resin in an ethanol solution at a concentration of 10 percent is 40 to 250 Pa.s; the residual butyraldehyde content is less than or equal to 10 ppm, and the residual diethylhexenal content is less than or equal to 1,000 ppm. The invention furtherprovides a preparation method of the polyvinyl alcohol butyral resin. The preparation method comprises the following steps: dissolving polyvinyl alcohol which has a polymerization degree of 300 to 1,000 and an alcoholysis degree of 90 to 99 percent and is used as a raw material, and generating condensation reaction with aldehyde under the catalysis of acid, thereby obtaining polyvinyl alcohol butyral resin powder through neutralization reaction, washing and drying. When the special polyvinyl alcohol butyral resin for 3D printing provided by the invention is applied, no auxiliary resin is required to be added, and no solvent or plasticizer is needed; in a process of producing a 3D printing wire and a 3D printing process, no exhaust gas and odor are generated; and in addition, the product is relatively high in mechanical property and environmental aging resistance.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and relates to a special polyvinyl butyral resin for 3D printing and a preparation method thereof. Background technique [0002] Since the invention of 3D printer by Charles Hull in 1984, 3D printing technology and technology have developed rapidly. Three Industrial Revolutions" and gradually applied to military, medical, food, aerospace and many other fields. [0003] 3D printing technologies mainly include laser cladding (LCF), stereolithography (SLA), fused deposition modeling (FDM), selective laser sintering (SLS) and three-dimensional printing (3DP). The commonly used 3D printing materials can be divided into three categories: metal materials, polymer materials and inorganic non-metal materials. Among them, the materials with the largest amount, the widest application range and the most molding methods are polymer materials, which mainly include polymer wires. , photosensitive resin an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/28C08F16/06B33Y70/00
CPCB33Y70/00C08F8/28C08F16/06
Inventor 卢志高莫国军王博葛希谢怀玉王验
Owner ZHEJIANG DECENT PLASTIC
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