Additive manufacturing using photothermal dyes for high efficiency sintering

Patent metadata

Field	Value
Publication number	US-11014293-B2
Application number	US-201815915997-A
Country	US
Kind code	B2
Filing date	Mar 8, 2018
Priority date	Mar 8, 2018
Publication date	May 25, 2021
Grant date	May 25, 2021

Abstract

Methods, processes, and systems for the manufacture of three-dimensional articles made of polymers using 3D printing are provided. A layer of high performance polymer can be deposited on a build plate to form a powder bed. Then, a solution of a photothermal dye can be printed on the powder bed in a predetermined pattern. Alternatively, the photothermal dye can be added to the entire powder bed. Electromagnetic radiation can be applied, either to the entire bed or in a predetermined pattern, to form the final polymer. After a predetermined period of time, sequential layers are printed to provide the three-dimensional article. The three-dimensional object can be cured to produce the three-dimensional article composed of the final polymers.

First claim

We claim:

1. A method of manufacturing a three-dimensional article, the method comprising:
a. depositing a high-performance polymer (HPP) composition,
wherein the HPP composition, prior to deposition, comprises a first HPP dissolved in a solvent and a photothermal dye dissolved in the solvent;

b. exposing the HPP composition to electromagnetic radiation so as to result in photothermal transduction by the photothermal dye sufficient to sinter the first HPP, thereby forming a polymer layer of the three-dimensional article; and
c. repeating the steps (a)-(b) to form remainder of the three-dimensional article.

2. The method of claim 1 , wherein the first HPP comprises a polyketone.

3. The method of claim 2 , wherein the polyketone comprises polyetheretherketone (PEEK), polyaryletherketone (PAEK), polyetherketone (PEK), polyetherketoneketone (PEKK) polyetheretheretherketone (PEEEK), polyetheretherketoneketone (PEEKK), polyetherketoneetheretherketone (PEKEKK), or polyetherketoneketoneketone (PEKKK).

4. The method of claim 1 , wherein the solvent comprises spearmint oil, α-terpinene, limonene, α-pinene, fenchone, alcohols, water, aqueous mixtures, and combinations thereof.

5. The method of claim 1 , wherein HPP composition, prior to deposition, further comprises a particles of a second HPP, wherein the particles of the second HPP are insoluble in the solvent.

6. The method of claim 5 , wherein the second HPP comprises polyimides, polyketones, reduced forms of polyketones, and polyethersulfones.

7. The method of claim 1 , wherein the photothermal dye is IR-780, IR-806, IR-820, Idocyanine, or has the structure of Eq. 1:

wherein R′ and R″ are each independently selected from the group consisting of H, alkyl, substituted alkyl, arylalkyl, aryl, substituted aryl, heteroaryl, substituted heteroaryl, carboxylic acid, alkoxy, aryloxy, polyethylene glycol, amino, dialkylamino, halogen, triazole, amido, N-alkylamido, sulfone, sulfonate, phosphonate, or a salt, optical isomer, geometric isomer or tautomers thereof, or combinations thereof.

8. The method of claim 7 , wherein the photothermal dye has the structure of Eq. 2:

wherein R 1 , R 2 , R 3 and R 4 are each independently selected from the group consisting of H, alkyl, substituted alkyl, arylalkyl, aryl, substituted aryl, heteroaryl, substituted heteroaryl, carboxylic acid, alkoxy, aryloxy, polyethylene glycol, amino, dialkylamino, halogen, triazole, amido, N-alkylamido, sulfone, sulfonate, phosphonate, or wherein R 1 and R 2 taken together form an optionally substituted 5- or 6-membered ring, or wherein R 2 and R 4 taken together form an optionally substituted 5- or 6-membered ring, or a salt, optical isomer, geometric isomer or tautomers thereof.

9. The method of claim 8 , wherein the photothermal dye has the structure:

10. The method of claim 1 , wherein the electromagnetic energy is in the near infrared region.

11. The method of claim 10 , wherein the near infrared region has a wavelength of about 800 nm to about 1000 nm.

Assignees

• Lee Chang Uk
• Boydston Andrew J
• Ganter Mark A
• Storti Duane W
• Ricoh Co Ltd
• Univ Washington

Inventors

• Lee Chang-Uk
• Boydston Andrew J
• Ganter Mark A
• Storti Duane W

Classifications

• B33Y70/00

  Materials specially adapted for additive manufacturing · CPC title

• C08K5/0041

  Optical brightening agents, organic pigments · CPC title

• B29C64/165 Primary

  using a combination of solid and fluid materials, e.g. a powder selectively bound by a liquid binder, catalyst, inhibitor or energy absorber · CPC title

• C08L71/00

  Compositions of polyethers obtained by reactions forming an ether link in the main chain (of polyacetals C08L59/00; of epoxy resins C08L63/00; of polythioether-ethers C08L81/02; of polyether-sulfones C08L81/06); Compositions of derivatives of such polymers · CPC title

• C08G65/485

  Polyphenylene oxides · CPC title