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A kind of stereolithography rapid prototyping photosensitive resin and its preparation method and application

A photosensitive resin and stereolithography technology, which is applied in the direction of photosensitive materials for opto-mechanical equipment, etc., can solve the problems of limited heat resistance, no high-precision and high heat resistance stereolithography rapid prototyping materials, etc. The effect of good performance, small warpage deformation and high precision

Inactive Publication Date: 2011-12-28
GUANGZHOU MECHANICAL ENG RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is pointed out in the paper that the precision of parts made of this photosensitive resin is high, and the warpage and deformation of parts are basically eliminated, but the heat resistance of parts made of this photosensitive resin is limited.
At present, there is no report on the preparation method of high-precision, high-heat-resistant stereolithography rapid prototyping materials in China

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1. In a 5000 ml glass three-neck flask equipped with a stirrer and a condenser, add 450 grams of 3,4-epoxycyclohexylcarboxylate-3′,4′-epoxycyclohexylmethyl ester, 4,5-cyclo Oxyhexane-1,2-dicarboxylic acid diglycidyl ester 1500 grams, bisphenol A epoxy acrylate 240 grams, pentaerythritol triacrylate 240 grams, trimethylolpropane triacrylate 300 grams, benzoin dimethyl ether 90 gram, 180 grams of triaryl sulfonium hexafluorophosphate.

[0036] 2. Heat and stir until it becomes a transparent light yellow uniform liquid, which is a prepared photosensitive resin. Using the prepared photosensitive resin as a material, some test pieces were made using the SLA-3500 stereolithography equipment produced by 3D Systems.

[0037] 3. The test pieces were then post-cured for 90 minutes in a UV oven with a power of 500 milliwatts. According to the standard test methods of ASTM D2240, ASTM D790, ASTM D638 and ASTM D648, the Shore hardness is 89D, the tensile strength is 33MPa, the ten...

Embodiment 2

[0039] 1. In a 5000 ml glass three-neck flask equipped with a stirrer and a condenser, add 1650 grams of 3,4-epoxycyclohexylcarboxylate-3′,4′-epoxycyclohexylmethyl ester, o-cresol aldehyde epoxy Resin 200g, Trimethylolpropane Triglycidyl Ether 100g, Bisphenol A Epoxy Acrylate 240g, Pentaerythritol Triacrylate 270g, Trimethylolpropane Triacrylate 300g, Benzoin Dimethyl Ether 120g , 120 grams of iodonium diaryl hexafluoroantimonate.

[0040] 2. Heat and stir until it becomes a transparent light yellow uniform liquid, which is a prepared photosensitive resin. Using the prepared photosensitive resin as a material, some test pieces were made using the SLA-3500 stereolithography equipment produced by 3D Systems.

[0041] 3. The test pieces were then post-cured for 90 minutes in a UV oven with a power of 500 milliwatts. According to the standard test methods of ASTM D2240, ASTM D790, ASTM D638 and ASTM D648, the Shore hardness is 91D, the tensile strength is 31MPa, the tensile modu...

Embodiment 3

[0043] 1. Add 1200 grams of novolac epoxy resin, 950 grams of trimethylolpropane triglycidyl ether, 250 grams of bisphenol A epoxy acrylate, and 250 grams of bisphenol A epoxy acrylate in a 5000 ml glass three-necked flask equipped with a stirrer and a condenser tube. 190 grams of polypentaerythritol monohydroxypentaacrylate, 210 grams of trimethylolpropane triacrylate, 75 grams of benzoin dimethyl ether, and 125 grams of sulfonium triaryl hexafluoroarsenate.

[0044] 2. Heat and stir until it becomes a transparent light yellow uniform liquid, which is a prepared photosensitive resin. Using the prepared photosensitive resin as a material, some test pieces were made using the SLA-3500 stereolithography equipment produced by 3D Systems.

[0045] 3. The test pieces were then post-cured for 90 minutes in a UV oven with a power of 500 milliwatts. According to the standard test methods of ASTM D2240, ASTM D790, ASTM D638 and ASTM D648, the Shore hardness is 87D, the tensile strengt...

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Abstract

The invention provides a stereolithography rapid prototyping photosensitive resin, a preparation method and application thereof. It mainly includes the following raw material components in mass ratio: 30-80% epoxy resin; 10-35% acrylate; 1.0-5.0% free radical initiator; 1.0-8.0% cationic initiator; %. The raw material components are mixed according to the stated mass ratio; then heated and stirred until it becomes a transparent light yellow uniform liquid, and the photosensitive resin is obtained. After the photosensitive resin is formed by stereolithography, the formed parts have high precision and good heat resistance. The higher the precision of the formed parts, the smaller the size error of the parts produced by the three-dimensional modeling of stereolithography, and the smaller the amount of warping deformation, which improves the forming accuracy. The heat resistance of the formed parts is good, and the formed parts can be used in high temperature occasions, such as the manufacture of plastic casings for automobile lights.

Description

technical field [0001] The invention belongs to the field of rapid prototyping and manufacturing, and in particular relates to a stereolithography rapid prototyping photosensitive resin and a preparation method and application thereof. Background technique [0002] The basic working principle of rapid prototyping technology is discrete / accumulation. First, convert the physical model of the part into a computer model through CAD modeling or a 3D digitizer, then convert the CAD model into an STL (Stereolithography) file format, and use layered software to discretize the computer 3D solid model in the Z direction to form a series of A thin sheet with a certain thickness, the laser beam (or other energy flow) selectively solidifies or bonds a certain area under the control of the computer, thereby forming a layer that constitutes the entity of the part, so that a prototype (three-dimensional) is formed layer by layer. solid parts). [0003] So far, more than 10 mature rapid pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03F7/004
Inventor 刘海涛钟汉荣薛纪东
Owner GUANGZHOU MECHANICAL ENG RES INST