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Low-shrinkage photosensitive resin for 3D printing and preparation method of resin

A photosensitive resin and 3D printing technology, which is applied in the field of additive manufacturing, can solve the problems of reducing the shrinkage rate of photocuring resin and difficult to release stress, and achieve the effects of preventing color paste precipitation, fast reaction speed and excellent flexibility

Inactive Publication Date: 2019-12-03
映维(苏州)数字科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The light-curing reaction is completed in an instant, because the stress caused by curing shrinkage is difficult to release, which will cause warpage, so reducing the shrinkage of light-curing resins is an urgent problem to be solved

Method used

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  • Low-shrinkage photosensitive resin for 3D printing and preparation method of resin

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A 3D printing low-shrinkage photosensitive resin, comprising the following raw materials in parts by weight:

[0025] 50 parts of monofunctional polyurethane acrylic acid, 20 parts of isocecyl acrylate, 3 parts of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, 0.3 parts of leveling agent, 0.3 parts of dispersant, 0.3 parts of defoamer, 0.3 parts of polymerization inhibitor, 0.3 parts of adhesion promoter, 0.3 parts of white UV color paste and 10 parts of fumed silica.

[0026] A preparation method of said 3D printing low-shrinkage photosensitive resin, comprising the steps of:

[0027] (1) Add the monofunctional urethane acrylic acid, isocecyl acrylate and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide into a stirring vessel by weight and stir at 57°C for 30min, then reduce Stirring speed is 1000r / min, obtains the first mixture;

[0028] (2) Add the leveling agent of described 0.3 part in the first mixture, the dispersant of 0.3 part, the defoamer of 0.3 part, the po...

Embodiment 2

[0033] A 3D printing low-shrinkage photosensitive resin, comprising the following raw materials in parts by weight:

[0034] 10 parts of difunctional polyurethane acrylic acid, 5 parts of tricyclodecane dimethanol diacrylate, 5 parts of acryloyl morpholine, 1 part of phenylbis(2,4,6-trimethyl, benzoyl) phosphine oxide, 0.1 part of leveling agent, 0.1 part of dispersant, 0.1 part of defoamer, 0.1 part of polymerization inhibitor, 0.1 part of adhesion promoter, 0.1 part of red UV color paste, 0.1 part of black UV color paste, nano 1 part of iron oxide yellow and 1 part of 5000 mesh talcum powder.

[0035] A preparation method of said 3D printing low-shrinkage photosensitive resin, comprising the steps of:

[0036] (1) Difunctional polyurethane acrylic acid, tricyclodecane dimethanol diacrylate, acryloyl morpholine and phenyl bis (2,4,6-trimethyl, benzoyl) phosphine oxide Add it into a stirring container and stir at 60°C for 20 minutes, reduce the stirring speed to 800r / min, an...

Embodiment 3

[0042] A 3D printing low-shrinkage photosensitive resin, comprising the following raw materials in parts by weight:

[0043] 40 parts of monofunctional polyurethane acrylic acid, 40 parts of difunctional polyurethane acrylic acid, 20 parts of acryloyl morpholine, 20 parts of isobornyl acrylate, 2 parts of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide , 3 parts of phenylbis(2,4,6-trimethyl, benzoyl) phosphine oxide, 0.5 part of leveling agent, 0.5 part of dispersant, 0.5 part of defoamer, 0.5 part of polymerization inhibitor, adhesion promotion 0.5 parts of UV color paste, 0.5 parts of red UV color paste, 0.5 parts of black UV color paste, 10 parts of nano iron oxide yellow and 10 parts of 5000 mesh talcum powder.

[0044] A preparation method of said 3D printing low-shrinkage photosensitive resin, comprising the steps of:

[0045] (1) The monofunctional polyurethane acrylic acid of described weight part, difunctional polyurethane acrylic acid, acryloyl morpholine, isobornyl ...

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Abstract

The invention discloses low-shrinkage photosensitive resin for 3D printing and a preparation method of the resin. The low-shrinkage photosensitive resin for the 3D printing includes the following rawmaterials in parts by weight: 10-80 parts of a low-shrinkage oligomer, 10-40 parts of a reactive diluent, 1-5 parts of a photoinitiator, 0.1-2.5 parts of an auxiliary agent, 0.1-0.5 part of color paste and 1-20 parts of a filler. The low-shrinkage photosensitive resin provided by the invention is filled with a monofunctional monomer, the oligomer and fumed silica, so that the shrinkage of the material is very low; silicon dioxide, iron oxide yellow powder and talc powder are adopted as fillers, so that the polarity of the monofunctional monomer and the oligomer can be reduced; and the silicondioxide and the talc powder can effectively increase the viscosity of the system to increase the stability of the system, and effectively avoid precipitation or flooding and floating of the color paste.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing, in particular to a 3D printing low-shrinkage photosensitive resin and a preparation method thereof. Background technique [0002] Additive Manufacturing (AM), also known as 3D printing, is to process digital model files layer by layer through software and CNC system-specific materials according to the principle of calculus in accordance with laser sintering, melt extrusion, light curing, inkjet, etc. Build up the technology that finally took shape. [0003] Photocuring is a reaction method in which monomers or prepolymers with reactive functional groups are cross-linked and formed by absorbing light energy through photoinitiators. The photocuring reaction is completed instantaneously, because the stress caused by curing shrinkage is difficult to be released, which will cause warpage. Therefore, reducing the shrinkage of photocurable resins is a problem that needs to be solved urge...

Claims

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Application Information

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IPC IPC(8): C08F283/00C08F220/18C08F222/14C08F220/58C08K3/36C08K3/22C08K3/34B33Y70/00
CPCB33Y70/00C08F283/008C08K3/22C08K3/34C08K3/36C08K2003/2272C08K2201/011C08F220/58
Inventor 周佳磊钱文杜晖
Owner 映维(苏州)数字科技有限公司