Ink composition for powder bed and inkjet head 3D printing

Patent metadata

Field	Value
Publication number	US-10472529-B2
Application number	US-201615308414-A
Country	US
Kind code	B2
Filing date	Mar 28, 2016
Priority date	Mar 19, 2015
Publication date	Nov 12, 2019
Grant date	Nov 12, 2019

Abstract

The present invention relates to an ink composition containing a multifunctional adhesive suitable for a three-dimensional (3D) printer and the use thereof. The multifunctional adhesive of the present invention contains a compound with a catechol group and exhibits excellent adhesion to various materials (e.g. dry plaster powders, polymers, metals, ceramics, and composite materials). The use of the ink composition of the present invention containing the multifunctional adhesive enables the processing of various functional materials that were difficult to fabricate into a 3D structure. Therefore, it is highly likely that the ink composition of the present invention can effectively create a market for functional materials for a 3D printer and find new areas of application (e.g. automotive, medical, fashion, aviation/aerospace, construction, consumer electronics, entertainment, etc.).

First claim

The invention claimed is:

1. An ink composition for three-dimensional (3D) printing, comprising:
an adhesive;
a solvent;
a stabilizer; and
a viscosity controlling agent,
wherein the adhesive is a compound containing a catechol group, and
wherein the ink composition contains the adhesive at 10 to 30% by volume, the solvent at 40 to 60% by volume, the stabilizer at 5 to 10% by volume, and the viscosity controlling agent at 20 to 40% by volume.

2. The ink composition of claim 1 , wherein the ink composition has an Ohnesorge number (Oh) ranging from 0.1 to 1.0.

3. The ink composition of claim 1 , wherein the adhesive is selected from a group consisting of a polydopamine, a chitosan-catechol, a hyaluronic acid-catechol, and an alginate-catechol.

4. The ink composition of claim 1 , wherein the solvent is an alcohol-based solvent.

5. The ink composition of claim 1 , wherein the stabilizer is anhydrous 2-ethylhexyl acrylate (2-EHA) or 2-methoxyethanol (2-ME).

6. The ink composition of claim 1 , wherein the viscosity controlling agent is ethylhexanoic acid or 1,2-propanediol.

7. The ink composition of claim 1 , wherein the ink composition further comprises an oxidizing agent or a dye.

8. The ink composition of claim 7 , wherein the oxidizing agent is piperidine.

9. The ink composition of claim 7 , wherein the dye is an organic or inorganic dye listed in the Colour Index International.

Assignees

• Korea Inst Sci & Tech

Inventors

• Lee Heonju
• Moon Myoungwoon
• Jo Wonjin
• Han Sangsoo
• Lee Haeshin
• Song Intaek

Classifications

• B29K2105/251

  Particles, powder or granules (expandable particles B29K2105/046) · 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

• B29K2105/0097

  Glues or adhesives, e.g. hot melts or thermofusible adhesives · CPC title

• B29C71/0009

  using liquids, e.g. solvents, swelling agents (spectacle cases, e.g. for cleaning contact lenses A45C11/04; disinfecting or sterilising contact lenses A61L12/00, using liquid substances A61L2/20; cleaning involving the use of liquid in general B08B3/00; for hydrating contact lenses B29D11/00067) · CPC title

• B29K2105/0044

  Stabilisers, e.g. against oxydation, light or heat · CPC title