A kind of preparation method of dual curing resin for 3D printing

Abstract

The invention belongs to the field of 3D printing consumables, and particularly relates to a preparation method of dual cured resin for 3D printing. The preparation method specifically comprises the steps of: (1) enabling flax oil, soya oil fatty acid, pentaerythritol, phthalic anhydride and fatty oil (acid) to react in presence of 8%wt xylene as reflux solvent to prepare dry oil alkyd resin; (2) enabling HEA(hydroxyethyl acrylate) and IPDI( isophorone diisocyanate) to react in presence of 0.1-0.8%wt polymerization inhibitor(MEHQ) and 0.1%wt T-12 catalyst to prepare a half addition product(HEA-IPDI-NCO) containing HEA at one end and NCO group at the other end; and (3) enabling the dry oil alkyd resin prepared in the step (1) and the half addition product (HEA-IPDI-NCO) prepared in the step (2) to react to obtain the dual cured resin for 3D printing. The dual cured resin for 3D printing prepared by the method disclosed by the invention has two curing modes, i.e. UV curing and oxidation curing, has the characteristics of low viscosity, low energy, fast curing and big adhesive force, and has better wetting property with pigment.

Description

technical field [0001] The invention relates to the field of preparation of consumables for 3D printing, in particular to a method for preparing a dual-curing resin for 3D printing. Background technique [0002] 3D printing materials are similar to inkjet printing materials, which are combined with nozzle technology and material properties. With the continuous improvement of nozzle technology, the materials that can be printed are becoming more and more extensive, including metal materials, inorganic non-metal materials, and polymer materials. No matter what kind of spray material, it is required to be compatible with the nozzle, so choosing the right material is the key to the problem. The existing 3D printing materials in the domestic market are mainly thermoplastic materials in the direction of polymer materials, mainly involving polylactic acid-polyglycolic acid copolymers, poly-L-lactic acid, ABS, nylon, etc. Among them, polylactic acid-polyglycolic acid copolymer, po...

AI Technical Summary

Problems solved by technology

[0003] Photosensitive materials used for 3D printing, produce shrinkage stress during the curing process, resulting in poor interlayer adhesion

At the same time, due to the effect of oxygen inhibition, the photosensitive resin cannot be completely cured under low energy, and eventually the surface is sticky and cannot be molded.

There are also printing materials prepared by photothermal re-curing mechanism, which require additional heating devices, consume energy, and the product has poor workability and poor storage stability.