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Photocurable liquid resin composition for three-dimensional molding and its photocured shaped object

A three-dimensional, liquid resin technology, applied in the field of light-cured liquid resin compositions and the molded objects obtained by light-curing, can solve the problems of poor resin fluidity, poor product flexibility, and easy deformation.

Active Publication Date: 2017-12-26
SHENZHEN ANPIN SILICONE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Domestic research on 3D printing and its special photocurable liquid resins started relatively late, and most of the special photocurable liquid resins rely on imports. There are few reports in China. The existing photocurable liquid resins are generally composed of prepolymers, diluted monomers, Initiator and other components, the prepolymer includes polyurethane acrylate, epoxy acrylate, polyester acrylate, epoxy resin and other polymer materials containing active functional groups, which can be produced by photoinitiators under the irradiation of visible light, ultraviolet light, laser, etc. Initiate a polymerization reaction to generate an insoluble film layer, which has excellent mechanical and chemical stability, but the existing photocurable resins generally have a relatively high viscosity (generally, the dynamic viscosity is greater than 500mPa·s, and the maximum exceeds 5000mPa·s). Guarantee the strength and flexibility of the cured film layer, but the resin has poor fluidity, is easy to sag, and is easy to deform. The viscosity can be reduced by increasing the diluent or using a prepolymer with a low degree of polymerization, but the excessive amount of diluent will cause the resin to shrink. The curing shrinkage rate is large (general volume shrinkage rate is more than 5%, the maximum is more than 8%) and the flexibility of the product is poor, and the use of prepolymers with a low degree of polymerization also leads to poor flexibility of the product, which is difficult to meet in the photocuring molding of precision parts. Require

Method used

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  • Photocurable liquid resin composition for three-dimensional molding and its photocured shaped object
  • Photocurable liquid resin composition for three-dimensional molding and its photocured shaped object
  • Photocurable liquid resin composition for three-dimensional molding and its photocured shaped object

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Prepare a photocurable liquid resin composition for three-dimensional stereoforming, and the preparation method is as follows:

[0046] Epoxy acrylate CN104NS (viscosity is 18900mPa s, functionality is 2) 50g, hyperbranched urethane acrylate CN2303 (viscosity is 350mPa s, functionality is 16) 85g, the first aliphatic urethane acrylate H518 (viscosity 50000~70000mPa·s, functionality 2) 140g, second aliphatic urethane acrylate UT20064 (viscosity 2500mPa s, functionality 2) 250g and third aliphatic urethane acrylate R-7162 (viscosity is 20mPa s, functionality is 1) mixed with 650g (both viscosities are dynamic viscosity values ​​at 25°C) to obtain a mixed solution. At 25°C, use NDJ-8s digital rotational viscometer according to / T 1024-1988 The viscosity of the test mixture is 3200mPa·s; then add 50g of reactive diluent 2-phenoxyethyl acrylate (POEA) and acrylic acid (2-isopropyl-2-methyl-1,3- Dioxolane) 4-methyl ester (MIBDOL10) 100g, stirred at a high speed of 2000r / min...

Embodiment 2

[0048] Prepare a photocurable liquid resin composition for three-dimensional stereoforming, and the preparation method is as follows:

[0049] Epoxy acrylate CN131NS (viscosity is 210mPa s, functionality is 1) 80g, hyperbranched urethane acrylate BDE1029 (viscosity is 350mPa s, functionality is 14) 100g, the first aliphatic urethane acrylate CN8882NS (viscosity 90000~120000mPa·s, functionality 2) 80g, second aliphatic urethane acrylate CN981B88NS (viscosity 1520mPa s, functionality 2) 400g, third aliphatic urethane acrylate UT20522 (viscosity 142mPa s , the functionality is 3) 250g (the viscosity is the dynamic viscosity value at 25°C) is mixed to obtain a mixed solution, and at 25°C, the NDJ-8s digital rotational viscometer is used to test the viscosity of the mixed solution according to GB / T 1024-1988 Viscosity is 6800mPa·s; then add active diluent glycidyl methacrylate (GMA) 100g, methacrylate-2-phenoxyethyl 50g, acrylic acid (2-ethyl-2-methyl-1,3 -Dioxolane) 4-methyl este...

Embodiment 3

[0051] Prepare a photocurable liquid resin composition for three-dimensional stereoforming, and the preparation method is as follows:

[0052] Epoxy acrylate 625C-45 (viscosity 5000-9000mPa·s, functionality 3-4) 100g, hyperbranched urethane acrylate CN2300 (viscosity 600mPa·s, functionality 8) 80g, the first aliphatic Urethane acrylate CN9001NS (viscosity 46500mPa·s, functionality 2) 90g, the second aliphatic urethane acrylate R-7495 (viscosity 2800mPa s, functionality 2) 180g, second aliphatic urethane acrylate CN9178NS (viscosity 3000mPa s, functionality 2) 170g and third aliphatic urethane acrylate R-7162 (viscosity is 20mPa s, functionality is 1) 300g (both viscosities are dynamic viscosity values ​​at 25°C) are mixed to obtain a mixed solution. / T 1024-1988 The viscosity of the test mixture is 6750mPa s; then add reactive diluent isobornyl methacrylate (IBOA) 100g, methacrylate-2-phenoxyethyl ester 100g, glycidyl methacrylate (GMA) 50g, stirred at a high speed of 2000...

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Abstract

The invention belongs to the field of material technology, and discloses a light-cured liquid resin composition for three-dimensional molding and a shape obtained by light curing thereof. The composition includes epoxy acrylate, hyperbranched urethane acrylate, and aliphatic urethane acrylate , a reactive diluent and an initiator, and light-irradiate the above-mentioned photocurable liquid resin composition for three-dimensional molding to obtain a molded object. The photocurable liquid resin composition of the present invention has low viscosity and shrinkage rate, has excellent strength and flexibility after curing, is suitable for preparing molded objects with fine parts, and has low preparation cost and simple process.

Description

technical field [0001] The invention relates to a photocurable liquid resin composition used for three-dimensional stereoforming and a molded object obtained by photocuring. Background technique [0002] The molding method of three-dimensional objects includes additive manufacturing or 3D printing technology, which is to use the computer-aided design data of objects to build three-dimensional objects layer by layer. The materials used to form thin layers include liquid resin, powder or other materials, wherein liquid resin includes photoresist Curing material, the molding process is to fill the thin layer structure of the three-dimensional object defined by the computer data with liquid resin, and then perform photocuring to obtain a cured layer, and then coat the resin on the cured layer, and obtain a superimposed cured layer after curing, repeating layer by layer This operation is performed until the shaping of the three-dimensional object is completed. [0003] Domestic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/14C08L63/10B33Y70/00
Inventor 刘珠陈樟丁小卫
Owner SHENZHEN ANPIN SILICONE MATERIAL