Unlock instant, AI-driven research and patent intelligence for your innovation.

Two-component polyurea material for 3D printing and method for 3D printing of polyurea product

A 3D printing, two-component technology, applied in the field of 3D printing, can solve the problems of yellowing and degradation, and the performance of printed products will be greatly affected, so as to avoid the effect of curing too fast.

Active Publication Date: 2022-01-14
SICHUAN UNIV
View PDF16 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method prints a polyurethane system, which requires a metal catalyst to adjust the curing rate of the AB component. The metal catalyst has a great influence on the performance of the printed product, and the printed product contains sulfur, which is prone to yellowing and degradation.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Two-component polyurea material for 3D printing and method for 3D printing of polyurea product
  • Two-component polyurea material for 3D printing and method for 3D printing of polyurea product
  • Two-component polyurea material for 3D printing and method for 3D printing of polyurea product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Mix 10g of dipropylamine and 16.63g of hexamethylene diisocyanate and stir at room temperature for 24h to obtain a compound containing blocked isocyanate.

[0041] Component A uses amino-terminated polypropylene glycol with a molecular weight of 4000, and component B is a mixture of toluene diisocyanate and the compound containing blocked isocyanate obtained in the previous step. The mass ratio of the two is 1:2. The mass ratio is 3:1, the printing speed is 300mm / min, and the laser curing time is 60 seconds for 3D printing.

[0042] Such as figure 1 As shown, the elongation at break of polyurea prepared by this 3D printing method can reach 440%, and it has good flexibility.

[0043] Such as figure 2 , transparent polyurea products with special complex structures can be prepared by this 3D printing method.

Embodiment 2

[0045] 10g of dipropylamine and 17.8g of toluene diisocyanate were stirred at room temperature for 24h to obtain a compound containing blocked isocyanate.

[0046]Component A uses amino-terminated polypropylene glycol with a molecular weight of 230, and component B is a mixture of diphenylmethane diisocyanate and the compound containing blocked isocyanate obtained in the previous step. The mass ratio of the two is 1:2. A, B The mass ratio of the components is 1:1, the printing speed is 200mm / min, and the laser curing time is 120 seconds for 3D printing.

[0047] Such as image 3 , the breaking strength of polyurea prepared by this 3D printing method can reach 57MPa, which has good mechanical properties. Such as Figure 4 It is an optical photo of the printed product. From this figure, it can be concluded that an opaque white polyurea product with a special and complex structure can be prepared by this 3D printing method.

Embodiment 3

[0049] 10g of methyl ethyl ketone oxime and 25.5g of isophorone diisocyanate were stirred at room temperature for 24h to obtain a compound containing blocked isocyanate.

[0050] Component A uses amino-terminated polyethylene glycol with a molecular weight of 400, and component B is a mixture of isophorone diisocyanate and the compound containing blocked isocyanate obtained in the previous step. The mass ratio of the two is 1:1. , The mass ratio of component B is 1:1, the printing speed is 500mm / min, and the laser curing time is 60 seconds for 3D printing.

[0051] Figure 5 is the tensile strength of the products printed along the X, Y, and Z directions in Example 3, and it can be drawn from this figure that the tensile strengths of the products printed along the X, Y, and Z directions are basically the same. The strength can reach 90% in the X direction, indicating that this 3D printing technology can obtain parts with isotropic mechanical properties.

[0052] Figure 6 i...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
tensile strengthaaaaaaaaaa
breaking strengthaaaaaaaaaa
elongation at breakaaaaaaaaaa
Login to View More

Abstract

The invention provides a two-component polyurea material for 3D printing and a method for 3D printing of a polyurea product. The two-component polyurea material comprises a component A and a component B, wherein the component A is one or a mixture of more than one selected from the group consisting of amino-terminated polyether, polyester and polyolefin, or one or a mixture of more than one selected from the group consisting of polyether, polyester and polyolefin with amino-containing side chains; and the component B is composed of a compound containing an isocyanate group and a compound containing blocked isocyanate in a mass ratio of 3: 1 to 1: 4. The component A and the component B are mixed through pumping in a printing cavity, pressure extrusion printing is performed, laser curing is adopted, and operation is cyclically repeated until printing is completed. According to the invention, direct-writing 3D printing is achieved, a polyurea product with a special complex structure can be printed, the strength of the printed product in the Z direction can reach 85% or above of the strength of the printed product in an XY plane, products with different mechanical properties including elastomers, thermosetting resin and the like can be obtained, the transparency of the printed product is adjustable, and the printed product can be used for preparing damping soles, toys for children, handicrafts and the like.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and in particular relates to a two-component 3D printing polyurea material and a method for 3D printing polyurea products. Background technique [0002] Polyurea is an elastomeric material produced by the reaction of isocyanate components and amino compound components. Divided into pure polyurea and semi-polyurea, their performance is not the same, the most basic characteristics of polyurea are anti-corrosion, waterproof, wear-resistant and so on. Polyurea protective coatings are solvent-free and pollution-free, and can be quickly formed on the surface of the material to form an overall dense, continuous and seamless high-strength, high-elastic coating, which has good wear resistance, impact resistance and marine climate aging resistance. An existing polyurea protective coating is prepared by reacting component R composed of highly active amino-terminated polyether and polyamine chain extend...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/80C08G18/50B29C64/135B29C64/268B29C64/336B29C64/343B29C64/393B33Y10/00B33Y30/00B33Y40/00B33Y50/02B33Y70/10B33Y80/00B29L31/50B29L31/52
CPCC08G18/808C08G18/8077C08G18/5021B29C64/135B29C64/268B29C64/336B29C64/343B29C64/393B33Y10/00B33Y30/00B33Y40/00B33Y50/02B33Y70/10B33Y80/00B29L2031/504B29L2031/5209
Inventor 王占华夏和生
Owner SICHUAN UNIV