Light-cured liquid resin for three-dimensional molding

A liquid resin, three-dimensional technology, applied in the field of materials, can solve problems such as large shrinkage, limiting the development of 3D printing accuracy and applications, and smaller gaps between molecules, achieving reduced shrinkage, improved mechanical strength, and wide application performance Effect

Inactive Publication Date: 2019-05-21
深圳锐沣科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The 3D printing photocurable resin of the existing acrylate system, due to the photocuring process, the acrylate monomer is converted from a small molecule to a macromolecular polymer, and the process of opening and connecting the double bond leads to a smaller gap between the molecules, resulting in severe shrinkage. There is a defect of large shrinkage during the polymerization process, which greatly limits the precision and application development of 3D printing

Method used

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  • Light-cured liquid resin for three-dimensional molding
  • Light-cured liquid resin for three-dimensional molding
  • Light-cured liquid resin for three-dimensional molding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Put each component material into the material barrel according to the following mass percentage ratio and mix:

[0020] The first urethane acrylate, with a content of 70%, is an aliphatic urethane acrylate with a functionality of 2 and a number average molecular weight Mn of 3000g / mol;

[0021] 10% of the second urethane acrylate, which is an aromatic urethane acrylate with a functionality of 3 and a number average molecular weight Mn of molecular weight 100000g / mol;

[0022] Crosslinker monomer, DPHA 1%,

[0023] Reactive diluent, ACMO 10%;

[0024] Tackifying resin SIS 5%, its molecular weight Mw is 100000g / mol;

[0025] Photoinitiator, TPO 5%.

[0026] Then, it was fully stirred under the condition of avoiding light, and stood still for 24 hours to finally obtain a photocurable liquid resin for three-dimensional stereoforming.

Embodiment 2

[0028] Put each component material into the material barrel according to the following mass percentage ratio and mix:

[0029] 10% of the first urethane acrylate is an aliphatic urethane acrylate with a functionality of 2 and a number average molecular weight Mn of 100000g / mol,

[0030] The second urethane acrylate 50%, which is an aromatic urethane acrylate with a functionality of 6 and a number average molecular weight Mn of 3000g / mol,

[0031] Crosslinker monomer DPHA, 10%,

[0032] Reactive diluents, including: ACMO 20%, IBOA 10%,

[0033] Photoinitiators, including: TPO 0.5%, EDB 0.5%.

[0034] Then, it was fully stirred under the condition of avoiding light, and stood still for 24 hours to finally obtain a photocurable liquid resin for three-dimensional stereoforming.

Embodiment 3

[0036] Put each component material into the material barrel according to the following mass percentage ratio and mix:

[0037] The first urethane acrylate 30%, which is an aliphatic urethane acrylate with a functionality of 2 and a number average molecular weight Mn of 5000 g / mol,

[0038] The second urethane acrylate 10%, it is aliphatic urethane acrylate, functionality is 5, number average molecular weight Mn is 8000g / mol,

[0039] Crosslinker Monomer TMPTA 40%,

[0040] Reactive diluent HEMA 14.75%,

[0041] Photoinitiators, including: TPO 5%, 819 0.25%.

[0042] Then, it was fully stirred under the condition of avoiding light, and stood still for 24 hours to finally obtain a photocurable liquid resin for three-dimensional stereoforming.

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Abstract

The invention discloses light-cured liquid resin for three-dimensional molding. The light-cured liquid resin for three-dimensional molding is prepared from the following components in percent by mass:10-70% of first polyurethane acrylate with the degree of functionality being 2, 10-50% of second polyurethane acrylate with the degree of functionality being 3-6, 1-40% of a crosslinking agent monomer, 10-50% of an active diluent, 0-10% of tackifying resin and 0.1-5% of a photoinitiator. The speed of a reaction process of the light-cured liquid resin is controlled by using a lot of high molecularweight polyurethane acrylate resin and the low content small molecular diluent. The high molecular weight polyurethane acrylate polymer is long in side chain and the steric hindrance of the side chain reduces influence of shrinkage in a polymerization process greatly, so that the shrinkage rate of the polyurethane acrylate system resin in the polymerization process is reduced obviously. In addition, according to the high content polyurethane acrylate contained in the acrylate system, the mechanical strength of the acrylate resin is improved greatly, and the light-cured liquid resin has wide application performance.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a photocurable liquid resin for three-dimensional stereoforming. Background technique [0002] 3D printing technology is an emerging technology that uses computer-aided design data to build three-dimensional objects layer by layer. The materials used for molding include liquid resin, powder or other materials, and the liquid resin includes light-curing materials. [0003] However, the existing photocurable liquid resins are generally composed of prepolymers, photosensitive monomers, photoinitiators, auxiliary agents, etc. form a solid state. The 3D printing photocurable resin of the existing acrylate system, due to the photocuring process, the acrylate monomer is converted from a small molecule to a macromolecular polymer, and the process of opening and connecting the double bond leads to a smaller gap between the molecules, resulting in severe shrinkage. There is a defect of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/00C08F222/14C08F226/06C08F222/20C08F220/58C08F220/18C08F220/20C08F2/48
Inventor 林志峰冯玉林邓伟平苏梅
Owner 深圳锐沣科技有限公司
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