Polyacrylate-based 3D printing material and preparation method thereof

Abstract

The invention discloses a polyacrylate-based 3D printing material and a preparation method thereof. The preparation method of the 3D printing material comprises the following steps: preparing an acrylic emulsion from 40-90 parts of a hard monomer, 10-60 parts of a soft monomer, 5-10 parts of a carboxyl group-containing monomer, 1-3 parts of an emulsifier and 0.2-1 part of an initiator, mixing the acrylic emulsion with inorganic compound powder, and grinding the obtained mixture. The polyacrylate resin emulsion is adsorbed to calcium sulfate and other inorganic compound powder, so the 3D printing material combining the high structural strength of the inorganic compound with the high flexibility of an organic polymer is prepared; a solid product printed by adopting the 3D printing material has good mechanical strength and mechanical performances, good flexibility and extremely wide application prospect; and water is used as a reaction medium and a bonding solution in the production and printing processes of the 3D printing material, so zero discharge of VOCs, environmental protection and safe operation are realized, and current low carbon and environmental protection demands are met.

Description

technical field [0001] The invention relates to a 3D printing material and a preparation method thereof, in particular to a polyacrylate-based 3D printing material and a preparation method thereof. Background technique [0002] 3D printing technology is based on digital model files, and uses bondable materials such as powdered metal or plastic to manufacture entities by layer-by-layer printing. As a revolutionary manufacturing technology in the new century, 3D printing technology has gradually been widely used in the fields of automobile, aerospace, education, civil engineering, biomedicine and so on. [0003] However, the current 3D printing technology is also facing many problems. Among them, the lack of 3D printing materials is one of the biggest bottlenecks restricting the development of 3D printing technology. At present, 3D printing materials based on gypsum, photosensitive resin, and plastic are mainly used. They have defects such as poor printing accuracy, insuffic...

AI Technical Summary

Problems solved by technology

At present, 3D printing materials based on gypsum, photosensitive resin, and plastic are mainly used. They have defects such as poor printing accuracy, insufficient strength of solid finished products, slow printing speed, and high manufacturing costs, which are difficult to meet modern industrial applications.

[0004] For example, the Chinese invention patent CN201310420778.3 discloses a 3D printing material based on edible wax. The mechanical strength of the finished product printed by it is very poor, and it is not suitable for industrial use at all.

Chinese invention patent CN201410458299.5 discloses an inorganic powder 3D printing material. Although the mechanical strength of the solid finished product printed by printing is good, the flexibility is extremely poor, and the printing speed is slow, so it is difficult to obtain practical application

Chinese invention patent CN201310091047.9 discloses a polyurethane acrylate prepolymer 3D printing material cured by photopolymerization. Although the physical finished product made by it has excellent flexibility, its mechanical strength is poor, and the manufacturing process of related resins The printing and printing control process is quite complicated, the manufacturing cost is high, and many volatile chemical raw materials with certain toxicity are required, so this material is almost difficult to popularize.