A kind of 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 3D printing material consists of 40-90 parts of hard monomers, 10-60 parts of soft monomers, 5-10 parts of carboxyl-containing monomers, 1 ~3 parts of emulsifier, 0.2~1 part of initiator to make acrylic emulsion, and then mix and grind the acrylic emulsion and inorganic compound powder. In the present invention, the polyacrylate resin emulsion is adsorbed in inorganic compound powders such as calcium sulfate, so as to obtain a 3D printing material having both the high structural strength of the inorganic compound and the high flexibility of the organic polymer; the 3D printing material of the present invention is used to print The finished solid product not only has relatively good mechanical strength and mechanical properties, but also has good flexibility, and has a very broad application prospect; in the production and printing process of 3D printing materials, water is used as the reaction medium and bonding solution respectively, zero VOC emissions are not only green and environmentally friendly, but also safe to operate, in line with today's demands for low-carbon environmental protection.

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, Chinese invention patent CN 201310420778.3 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 CN 201410458299.5 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 CN 201310091047.9 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 and The 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 be widely used