Composition for model materials, optically shaped article, and method for producing optically shaped articles

Patent metadata

Field	Value
Publication number	US-11491776-B2
Application number	US-201716084190-A
Country	US
Kind code	B2
Filing date	Feb 28, 2017
Priority date	Mar 14, 2016
Publication date	Nov 8, 2022
Grant date	Nov 8, 2022

Abstract

A composition for model materials (4a) is used for shaping an optically shaped article by an inkjet optical shaping method, comprises a monofunctional monomer (A) and an oligomer (B) as a photocurable component, further, comprises no polyfunctional monomer (C) as a photocurable component, or comprises a polyfunctional monomer (C) as a photocurable component at 3.0 parts by weight based on 100 parts by weight of a whole composition for model materials, the oligomer (B) has a hydroxyl group or an amino group, and a total molar fraction of the hydroxyl group and the amino group in a total amount of the photocurable components is less than 5.0%. The composition for model materials (4a) can afford an optically shaped article that has flexibility, and does not crack even when it is bent.

First claim

The invention claimed is:

1. A composition for model materials, which is used for shaping an optically shaped article by an inkjet optical shaping method,
comprising a monofunctional monomer (A) and an oligomer (B) as a photocurable component,
further, comprising no polyfunctional monomer (C) as a photocurable component, or comprising a polyfunctional monomer (C) as a photocurable component at 3.0 parts by weight or less based on 100 parts by weight of a whole composition for model materials,
wherein the oligomer (B) has a weight average molecular weight Mw of 1,000 to 10,000 and has a hydroxyl group or an amino group, and
a total molar fraction of the hydroxyl group and the amino group in a total amount of the photocurable components is 2.5% or less.

2. The composition for model materials according to claim 1 , wherein the oligomer (B) is one or more selected from a urethane (meth)acrylate oligomer, an epoxy (meth)acrylate oligomer, and a polyester (meth)acrylate oligomer.

3. The composition for model materials according to claim 1 , wherein a content of the monofunctional monomer (A) is 60.0 to 95.0 parts by weight based on 100 parts by weight of the whole composition for model materials.

4. The composition for model materials according to claim 1 , wherein a content of the oligomer (B) is 5 to 30 parts by weight based on 100 parts by weight of the whole composition for model materials.

5. An optically shaped article which is shaped by using the composition for model materials as defined in claim 1 by an inkjet optical shaping method.

6. A method for producing an optically shaped article by an inkjet optical shaping method, comprising:
a step (I) of photocuring the composition for model materials as defined in claim 1 to obtain a model material and, at the same time, photocuring a composition for support materials to obtain a support material, and
a step (II) of removing the support material.

7. The composition for model materials according to claim 2 , wherein a content of the monofunctional monomer (A) is 60.0 to 95.0 parts by weight based on 100 parts by weight of the whole composition for model materials.

8. The composition for model materials according to claim 2 , wherein a content of the oligomer (B) is 5 to 30 parts by weight based on 100 parts by weight of the whole composition for model materials.

9. The composition for model materials according to claim 3 , wherein a content of the oligomer (B) is 5 to 30 parts by weight based on 100 parts by weight of the whole composition for model materials.

10. The composition for model materials according to claim 1 , further comprising a photopolymerization initiator selected from the group consisting of acylphosphine oxide compounds having 22 to 28 carbon atoms.

Assignees

• Maxell Ltd
• Mimaki Eng Co Ltd

Inventors

• Kito Katsuyuki
• Izumo Taeko
• Okawa Masakatsu
• Hongo Kenta

Classifications

• C08F290/067

  Polyurethanes; Polyureas · CPC title

• B33Y10/00 Primary

  Processes of additive manufacturing · CPC title

• C08F220/286 Primary

  and containing polyethylene oxide in the alcohol moiety, e.g. methoxy polyethylene glycol (meth)acrylate · CPC title

• B29C64/118

  using filamentary material being melted, e.g. fused deposition modelling [FDM] · CPC title

• C08F220/281

  and containing only one oxygen, e.g. furfuryl (meth)acrylate or 2-methoxyethyl (meth)acrylate · CPC title