Triple-cured material for dlp-type 3D printing and its preparation method and application

Abstract

The invention discloses a triple curing material for DLP (Digital Light Processing) type 3D printing. The material is prepared from the following components in parts by weight: 5-10 parts of 2-hydroxy-3-phenoxypropyl acrylate, 2-6 parts of fatty acid modified epoxy diacrylate, 20-40 parts of bis((3,4-epoxycyclohexyl)methyl)adipate, 15-25 parts of hexafunctional aliphatic series modified urethane acrylate, 10-15 parts of bifunctional oxetane, 1-3 parts of a rubber structure modifier for epoxy resin, 2-10 parts of fumed silica, 2-10 parts of nano aluminum oxide, 20-40 parts of moisture curing type acrylic resin and 2-10 parts of 1,4-butanediol diglycidyl ether. When the triple curing material is applied to dental 3D printing, step-by-step efficient curing can be realized, and a high-ductility, high-strength and low-cost dental ceramic-like material can be prepared.

Description

technical field [0001] The invention belongs to the technical field of 3D printing materials, and in particular relates to a DLP type 3D printing triple curing material and a preparation method thereof, as well as the application of the material in dental 3D printing. Background technique [0002] With the development of the industrial 4.0 high-tech strategic plan and the continuous improvement of people's living standards, there are more and more demands for personalized customization, and at the same time, 3D printing technology has been born and developed rapidly. At present, in foreign countries, especially in the United States, due to the high cost, long time, and poor patient experience of traditional dental implant methods, the comfort and accuracy of dental implants are low, and data cannot be stored and transmitted, which has driven the application of 3D printing technology in dentistry. The use of 3D technology to print teeth, bridges, braces, and splints is in ful...

AI Technical Summary

Problems solved by technology

The above-mentioned SLA-type 3D printing usually requires ultraviolet light intensity energy in the range of 200-600mw / cm 2 , while dental-related 3D printing is mainly based on DLP (digital projection molding), and the intensity and energy of ultraviolet light are between 8 and 20mw / cm 2 , which limits the application of existing domestic printing materials in dentistry

[0004] Chinese patent CN105462134A "Multiple curing and enhanced 3D printing material and its manufacturing method" discloses a 3D printing material that can simultaneously undergo three curing reactions of UV light / moisture / cation, and can be rapidly prototyped at one time, but this material does not It is suitable for DLP 3D printing in dentistry. For example: the unique ultraviolet light conditions of DLP 3D printing cannot achieve efficient free radical and cationic curing at the same time; DLP 3D printing is sensitive to humidity because the laser is very high. Excessive humidity will greatly reduce the laser Therefore, the operating environment is required to strictly control the humidity to be less than 30% (that is, dry conditions), and the patent uses silane as a moisture-curing resin, which requires a relatively humid (usually humidity greater than 80%) operating environment, which obviously cannot be applied to DLP. In addition, the patent also uses special processes such as ethanol distillation, ultrasonic vibration, heating activation and grinding, which takes a long time (6 hours), has potential safety hazards, and requires high equipment requirements and costs, which is not suitable for industrial production

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