Active energy ray curable liquid composition, method for manufacturing three-dimensional objects, and apparatus for manufacturing three-dimensional objects

Patent metadata

Field	Value
Publication number	US-10584194-B2
Application number	US-201715629955-A
Country	US
Kind code	B2
Filing date	Jun 22, 2017
Priority date	Jun 28, 2016
Publication date	Mar 10, 2020
Grant date	Mar 10, 2020

Abstract

An active energy ray liquid composition is provided. A cured product of the active energy ray curable liquid composition is a solid at 25° C. and a liquid at 60° C., and the solid exhibits a compression stress of 2.0 kPa or more when compressed 1%.

First claim

The invention claimed is:

1. An active energy ray curable liquid composition, comprising:
at least one monomer (A) selected from the group consisting of stearyl acrylate, docosyl acrylate, stearyl methacrylate, docosyl methacrylate, palmityl acrylamide, stearyl acrylamide, vinyl stearate, and vinyl docosanoate;
a polymerization initiator (B); and
a solvent (C) capable of dissolving the monomer (A),
wherein a cured product of the active energy ray curable liquid composition is a solid at 25° C. and a liquid at 60° C.

2. The active energy ray curable liquid composition of claim 1 , wherein, when the cured product is obtained by irradiating the active energy ray curable liquid composition with 500 mJ/cm 2 of ultraviolet ray, the solid exhibits a compression stress of 0.5 kPa or more when being compressed at a strain of 1% at 25° C.

3. The active energy ray curable liquid composition of claim 1 , wherein, when the cured product is obtained by irradiating the active energy ray curable liquid composition with 500 mJ/cm 2 of ultraviolet ray, the liquid exhibits a viscosity of 5,000 mPa·s or less at 60° C.

4. An active energy ray curable liquid composition, comprising
at least one monomer (A) selected from the group consisting of stearyl acrylate, docosyl acrylate, stearyl methacrylate, docosyl methacrylate, palmityl acrylamide, stearyl acrylamide, vinyl stearate, and vinyl docosanoate;
a polymerization initiator (B); and
a solvent (C) capable of dissolving the monomer (A),
wherein
the active energy ray curable liquid composition exhibits a viscosity of 300 mPa·s or less at 25° C., and
a cured product of the active energy ray curable liquid composition is a solid exhibiting a compression stress of 0.5 kPa or more when being compressed at a strain of 1% at 25° C. and a liquid exhibiting a viscosity of 5,000 mPa·s or less at 60° C.

5. The active energy ray curable liquid composition of claim 1 , wherein the monomer (A), the polymerization initiator (B), and the solvent (C) account for 20% to 70% by mass, 0.5% to 10% by mass, 20% to 70% by mass, respectively, of the active energy ray curable liquid composition.

6. The active energy ray curable liquid composition of claim 1 , wherein the solvent (C) includes a compound having a straight chain including 6 or more carbon atoms.

7. A method for manufacturing three-dimensional objects, comprising:
laminating a cured product of the active energy ray curable liquid composition of claim 1 .

8. A method for manufacturing three-dimensional objects, comprising:
creating a support structure by laminating a cured product of the active energy ray curable liquid composition of claim 1 , and
removing the support structure by application of heat.

9. The method of claim 8 , further comprising:
creating a three-dimensional object by laminating a hydrogel.

10. An apparatus for manufacturing three-dimensional objects, comprising:
a container storing the active energy ray curable liquid composition of claim 1 ;
an ejection device to eject the active energy ray curable liquid composition; and
a curing device to cure the active energy ray curable liquid composition ejected by the ejection device.

11. The active energy ray curable liquid composition of claim 1 , wherein the solvent (C) is at least one selected from the group consisting of hexyl acetate, octyl acetate, hexanol, decanol, and dodecanol.

12. The active energy ray curable liquid composition of claim 4 , wherein the solvent (C) is at least one selected from the group consisting of hexyl acetate, octyl acetate, hexanol, decanol, and dodecanol.

Assignees

• Iwata Hiroshi
• Norikane Yoshihiro
• Niimi Tatsuya
• Matsumura Takashi
• Naito Hiroyuki
• Ricoh Co Ltd

Inventors

• Iwata Hiroshi
• Norikane Yoshihiro
• Niimi Tatsuya
• Matsumura Takashi
• Naito Hiroyuki

Classifications

• B29C64/112

  using individual droplets, e.g. from jetting heads · CPC title

• C08F2800/20

  as weight or mass percentages · CPC title

• C08F20/16 Primary

  of phenols or of alcohols containing two or more carbon atoms · CPC title

• C09D11/101

  Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing · CPC title

• B29C64/106

  using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material · CPC title