Photosensitive resin for laser 3D printing and preparation method thereof

A photosensitive resin and 3D printing technology, applied in the direction of additive processing, etc., can solve the problems of affecting the mechanical strength of printed parts, shrinkage and deformation of printed parts, large shrinkage deformation, etc., and achieve the effects of small shrinkage deformation, improved quality, and simple operation

Active Publication Date: 2018-02-16
惠展电子材料(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional photosensitive resins have large shrinkage and deformation after curing, and the difference in high temperature resistance leads to volume shrinkage and deformation of printed parts, which seriously affects the final mechanical strength of printed parts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. In a 5000 ml glass three-necked flask equipped with a stirrer and a condenser, add 600 grams of tris(2-hydroxyethyl)isocyanurate triacrylate, 3,3-[oxybismethylene]- 600 grams of bis﹝3-ethyl﹞oxetane, 630 grams of bisphenol A epoxy resin, 900 grams of alicyclic epoxy resin, 90 grams of 1-hydroxycyclohexyl benzophenone, triarylsulfonium six 120 grams of fluoroantimonate, 60 grams of 3-methacryloxypropyl trimethoxy silicon.

[0024] 2. Heat to 50°C and stir for 60 minutes to make it a light yellow transparent and uniform liquid. This liquid is a prepared photosensitive resin, and its critical exposure amount E is measured. C 17.5mj / cm 2 .

[0025] 3. Use the Lite300 SLA3D printer produced by Union Thai to make the test piece, and then cure it in a UV box with a power of 500 mW for 90 minutes. The measured TG value is 128°C, and the warpage factor CF (6) of the test piece is 0.01 , CF (11) = 0.03, the tensile strength of the test piece is 28.5MPa, the elongation at bre...

Embodiment 2

[0027] 1. In a 5000 ml glass three-necked flask equipped with a stirrer and a condenser, add 600 grams of tricyclodecane dimethanol diacrylate, 3,3-[oxybismethylene]-bis[3-ethyl ﹞Oxetane 600 grams, bisphenol A epoxy resin 630 grams, alicyclic epoxy resin 900 grams, 1-hydroxycyclohexyl benzophenone 90 grams, triarylsulfonium hexafluoroantimonate 120 grams , 60 grams of 3-methacryloxypropyltrimethoxysilane.

[0028] 2. Heat to 50°C and stir for 60 minutes to make it a light yellow transparent and uniform liquid. This liquid is a prepared photosensitive resin, and its critical exposure amount E is measured. C 18mj / cm 2 .

[0029] 3. Use the Lite300 SLA3D printer produced by Union Thai to make the test piece, and then cure it in a UV box with a power of 500 mW for 90 minutes. The measured TG value is 115°C, and the warpage factor CF (6) of the test piece is 0.01 , CF (11) = 0.02, the tensile strength of the test piece is 26.3MPa, the elongation at break is 4.8% and the impact s...

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PUM

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Abstract

The invention discloses a photosensitive resin for laser 3D printing and a preparation method thereof. The photosensitive resin comprises the following raw materials in parts by weight: 10-40 parts ofacrylic ester with high TG value, 10-65 parts of an epoxy resin, 5-30 parts of a trimethylene oxide compound, 1-10 parts of a cationic photopolymerization initiator, 1-10 parts of a free radical typephotopolymerization initiator and 1-5 parts of a silane coupling agent. The preparation method comprises the following steps: mixing the raw materials according to the weight part ratio, and then heating and stirring at 20-80 DEG C for 30-150 minutes to enable the raw materials to become faint yellow transparent liquid. The photosensitive resin overcomes the defects of a traditional laser 3D printing medium, and has the characteristics of high temperature resistance and small shrinkage deformation, the forming effect of the print parts is guaranteed, and the quality of the print parts is effectively improved; the method is simple to operate and the photosensitive resin is convenient to prepare.

Description

technical field [0001] The invention relates to a photosensitive resin for laser 3D printing and a preparation method thereof. Background technique [0002] Laser 3D printing can print three-dimensional objects continuously and rapidly, and most of them use special wax, photosensitive resin, powdered metal or plastic and other bondable materials as the printing material medium. The photosensitive resin is usually composed of two parts, namely photoinitiator and resin, and the resin is composed of prepolymer, diluent and a small amount of auxiliary agent. When the photoinitiator in the photosensitive resin is irradiated by a specific light source to absorb energy, free radicals or cations will be generated, and the free radicals or cations will activate the monomers and active oligomers, resulting in a crosslinking reaction to generate a polymer cured product. Traditional photosensitive resins have large shrinkage and deformation after curing, and the difference in high temp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/10C08F222/22C08F222/14C08F2/48C08K5/5435C08K5/5425B33Y70/00
CPCC08F2/48C08F283/10C08K5/5425C08K5/5435B33Y70/00C08F222/102C08F222/22
Inventor 熊杰
Owner 惠展电子材料(上海)有限公司
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