Additive Manufacturing Method Using Light-Tuned Radical Polymerization

A methyl and alkyl technology, applied in the field of additive manufacturing, can solve problems such as low hygroscopicity and weak adhesion

Active Publication Date: 2021-06-08
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Additionally, weak cohesion, hygroscopicity and low powder recyclability have been mentioned as disadvantages of SLS using known polymer raw materials
Attempts have been made to add additives, such as fillers, to address these disadvantages, but this has met with only limited success due to the high viscosity of the polymer - high viscosity prevents uniform loading of additives to the polymer

Method used

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  • Additive Manufacturing Method Using Light-Tuned Radical Polymerization
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  • Additive Manufacturing Method Using Light-Tuned Radical Polymerization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0043] Embodiment 2 encompasses the photoredox catalyst of embodiment 1 wherein each Z is R 13 ,-B-(A) 2 ,-B-(R 13 ) 2 、-B(A)(R 13 ), -N-(A) 2 , -N-(R 13 ) 2 、-N(A)(R 13 ), -Si-(R 13 ) 3 , -Si(A) 3 , -Si(A) 2 (R 13 ) or -Si(A)(R 13 ) 2 . Specifically, in Example 2, each Z is R 13 ,-B-(R 13 ) 2 , -N-(R 13 ) 2 or -Si-(R 13 ) 3 . Specifically, in Example 2, each Z is R 13 ,-B-(A) 2 、-B(A)(R 13 ), -N-(A) 2 、-N(A)(R 13 ), -Si(A) 3 , -Si(A) 2 (R 13 ) or -Si(A)(R 13 ) 2 . Specifically, in Example 2, each Z is R 13 ,-B-(A) 2 ,-B-(R 13 ) 2 ,-N-(A) 2 , -N-(R 13 ) 2 , -Si-(R 13 ) 3 or -Si(A)(R 13 ) 2 . Embodiment 3 covers the photoredox catalyst of embodiment 1 wherein each Z is R 13 ,-B-(A) 2 ,-B-(R 13 ) 2 、-B(A)(R 13 ), -N-(A) 2 , -N-(R 13 ) 2 or -N(A)(R 13 ). Specifically, in Example 3, each Z is R 13 ,-B-(A) 2 ,-B-(R 13 ) 2 ,-N-(A) 2 or -N-(R 13 ) 2 . Embodiment 4 covers the photoredox catalyst of embodiment 1, wherein eac...

Embodiment 8

[0046] Specific compounds of Example 8 include those of Example 9, i.e., wherein Y is O, S, NR 14 or C(R 14 ) 2 photoredox catalyst. In embodiment 10, the disclosure provides the photoredox catalyst of embodiment 8 or 9, wherein Y is O, S or NR 14 . In embodiment 11, the present disclosure provides the photoredox catalyst of embodiment 8 or 9, wherein Y is O or S. In embodiment 12, the present disclosure provides the photoredox catalyst of embodiment 8 or 9, wherein Y is S. In embodiment 13, the disclosure provides the photoredox catalyst of embodiment 8 or 9, wherein Y is C(R 14 ) 2 . Embodiment 14 covers the photoredox catalyst of embodiment 8, wherein Y is absent.

Embodiment 15

[0047] Embodiment 15 encompasses the photoredox catalyst of any one of embodiments 8 to 14, wherein o and q are independently zero.

[0048] In embodiment 16, the disclosure provides the photoredox catalyst of any one of embodiments 8-14, wherein at least one of o and q is 1. Embodiment 17 covers the photoredox catalyst of embodiment 16, wherein R 11 and R 12 independently selected from the group consisting of hydrogen, halogen, cyano, hydroxyl, amino, mono(C 1 -C 20 ) Alkylamino or two (C 1 -C 20 ) Alkylamino, C 1 -C 6 Alkyl and C 1 -C 6 alkoxy. Specifically, in Example 17, R 11 and R 12 independently selected from the group consisting of hydrogen, halogen, hydroxyl, amino, mono(C 1 -C 20 ) Alkylamino or two (C 1 -C 20 ) Alkylamino, C 1 -C 6 Alkyl and C 1 -C 6 alkoxy.

[0049] Specific embodiments based on Examples 8 to 17 include those of Example 18, i.e., wherein R 13 for C 1 -C 20 Alkyl, -C(O)C 1 -C 20 Alkyl, C 3 -C 7 Cycloalkyl, aryl, aryl (C 1...

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Abstract

A method for making a three-dimensional object, the method comprising: meth(acrylate), (meth)acrylamide, (meth)acrylonitrile, styrene, acrylonitrile, vinyl acetate, vinyl carbazole, at least one of vinylpyridine, vinyl ether, vinyl chloride monomer, polyfunctional monomer, and polyfunctional prepolymer combined with an organic photoredox catalyst to provide a reaction mixture; depositing the reaction mixture; by irradiating with a light source the reaction mixture polymerizes the monomer; and repeats the deposition step until the three-dimensional object is formed.

Description

Background technique [0001] The present disclosure relates to additive manufacturing and in particular to methods of making objects via additive manufacturing using photoredox catalysts to achieve metal-free light-tuned free radical polymerization. [0002] Additive manufacturing is generally a method in which three-dimensional (3D) objects are made based on a computer model of the object. These methods are used in a variety of fields, such as design-related fields for visualization, demonstration, and mechanical prototyping purposes. [0003] 3D printing is an example of additive manufacturing. 3D printing methods include Fused Deposition Modeling (FDM) and Selective Laser Sintering (SLS). Materials used in 3D printing are typically polymers; common examples include acrylonitrile butadiene styrene (ABS), polylactic acid (PLA), polyamide, polyether ether ketone (PEEK), and thermoplastic polyurethane ( TPU). [0004] Many factors are considered when choosing a 3D printing m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F122/10C08F2/48B33Y70/00G03F7/00
CPCG03F7/0037B33Y70/00G03F7/027G03F7/029G03F7/031B29C64/135
Inventor P·克拉克J·W·克雷默A·J·帕其克
Owner DOW GLOBAL TECH LLC
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