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A kind of uv-pu dual curing 3D printing resin and its preparation method and application

A dual-curing, resin-based technology used in 3D printing materials to address issues such as increased viscosity, restricted usage, and high shrinkage

Active Publication Date: 2021-05-11
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, fast curing rate and good mechanical properties require high crosslinking density. Traditional photocurable resins only crosslink and cure through double bond reactions, and their high crosslinking density will inevitably lead to high shrinkage.
Secondly, polymers with large molecular weight have excellent performance, but excessive molecular weight leads to increased viscosity, which limits their use in 3D printing

Method used

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  • A kind of uv-pu dual curing 3D printing resin and its preparation method and application
  • A kind of uv-pu dual curing 3D printing resin and its preparation method and application
  • A kind of uv-pu dual curing 3D printing resin and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment

[0021]1, in a four-port flask with 500 ml of the condensed electric thermal and condensed tube, an organic acid, an epoxy monomer, a catalyst, and a polymerization agent is added in Table 1. Heat stirring, the constant temperature of 80 ° C is transparent, warmed to 100 ° C, and continued to react to a acid value below 20-10 mgkOH / g. The prepolymer is at least one of the formulas of formulas.

[0022]2, according to Table 2, the above prepolymer is added to the beaker, and photoinitiators, diluents, and curing agents are added to another beaker, and the light is mixed until the photoinitiator is completely dissolved, poured into the prepolymer, avoiding The light agitated to a transparent uniform state, resulting in resin spare.

[0023]3, use laser stereo printing (SLA) 3D printer, print the standard stretch test spline according to ISO 527 standard. The spline is placed in an oven for 2 h.

[0024]The tensile strength and elongation elongation in this experimental data is based on the IS...

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Abstract

The invention provides a preparation method for 3D printing ultraviolet-polyurethane (ultraviolet-polyurethane; UV-PU) dual-curing resin. Contain the general formula of prepolymer structure in this dual curing resin such as formula 1, formula 2, formula 3, formula 4, wherein R 1 Represents methyl or hydrogen, R 2 , R 3 Indicates alkylene, cycloalkylene, arylene, R 2 , R 3 can be the same or different, R 4 Arylene, alkylene, cycloalkylene. The low-viscosity polyurethane curing agent added to the UV-PU dual-curing system of the present invention is equivalent to a diluent in the 3D printing process, and is a curing agent in the post-curing, which reacts with the hydroxyl group in the oligomer to further cure, improving the printing quality. The strength of the connection between the layers, while enhancing its mechanical properties and thermal stability. The dual-curing 3D printing resin of the present invention has the advantages of high tensile strength, high elongation at break, low shrinkage, and low viscosity.

Description

Technical field[0001]The present invention relates to the field of 3D printing materials, and more particularly to a 3D printing material having a low viscosity of UV-PU dual solidification.Background technique[0002]In recent years, 3D printing technology has developed rapidly, and the application are widely used in the field of automotive industry, medical equipment, human organs, mold manufacturing and other industries. 3D printing can be recognized by the ability to quickly shape, and can achieve high precision requirements, and can print a complex structure that is uncommeted in general molds. At present, 3D printing has a wide range of techniques with melt deposited FDM (Fused Deposition Modeling), laser stereotype SLA (STEREO LITHOPPATUS) and digital light processing DLP (Digital Light Processing). FDM is thermoplastic molding, this technique is to print a target product with a computer control program under high temperature melting conditions. The photocurable molding is init...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F265/06C08F220/20C08F222/20C09D175/04C09J175/04B33Y70/00
CPCB33Y70/00C08F265/06C09D175/04C09J175/04C08F222/102
Inventor 周照喜李悦微龚翠然罗震郑杨清余利明许莹吴立新
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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