Build material and applications thereof

Patent metadata

Field	Value
Publication number	US-2016279870-A1
Application number	US-201615172347-A
Country	US
Kind code	A1
Filing date	Jun 3, 2016
Priority date	Mar 9, 2011
Publication date	Sep 29, 2016
Grant date	—

Abstract

In one aspect, build materials operable for use in 3D printing systems are described herein. In some embodiments, a build material comprises an oligomeric curable material, a reactive component that is solid at 25° C., and at least one diluent, wherein the reactive component comprises at least one chemical moiety that is polymerizable with a chemical moiety contained in the oligomeric curable material and/or the at least one diluent.

First claim

That which is claimed:

1 . A method of printing a three dimensional article comprising:
selectively depositing layers of a fluid build material to form the three dimensional article on a substrate,
wherein the build material comprises:
an oligomeric curable material;
a reactive component;
a non-reactive component comprising one or more urethane waxes; and
at least one diluent,

wherein the reactive component comprises at least one chemical moiety that is polymerizable with a chemical moiety contained in the oligomeric curable material and/or the at least one diluent and wherein the reactive component is present in the build material as crystalline regions.

2 . The method of claim 1 , wherein the layers of the build material are deposited according to an image of the three dimensional article in a computer readable format.

3 . The method of claim 1 further comprising supporting at least one of the layers of the build material with a support material.

4 . The method of claim 1 further comprising curing the build material.

5 . The method of claim 1 , wherein the build material solidifies upon deposition.

6 . The method of claim 1 , wherein the build material remains substantially fluid upon deposition.

7 . The method of claim 1 , wherein the non-reactive component does not comprise a chemical moiety that is polymerizable with a chemical moiety contained in the oligomeric curable material or the at least one diluent.

8 . The method of claim 1 , wherein the build material further comprises one or more additives selected from the group consisting of photoinitiators, inhibitors, stabilizing agents, sensitizers, and combinations thereof.

9 . The method of claim 1 , wherein the oligomeric curable material is a urethane (meth)acrylate having a viscosity ranging from 10,000 cps to 300,000 cps.

10 . The method of claim 1 , wherein the oligomeric curable material and the reactive component each contain one or more acrylate or (meth)acrylate moieties.

11 . The method of claim 1 , wherein the reactive component comprises more than one chemical moiety that is polymerizable with a chemical moiety contained in the oligomeric curable material and/or the at least one diluent.

12 . The method of claim 1 , wherein the reactive component comprises at least one of the following: a urethane (meth)acrylate, a urea (meth)acrylate, and an isocyanurate (meth)acrylate.

13 . The method of claim 1 , wherein the reactive component is selected from the group consisting of:
(i) an isocyanurate tri(meth)acrylate; (ii) a species defined by the formula R 1 —NHCOO—R 2 —R 3 , wherein R 1 is C n H (2n+2) (wherein n=4-36), R 2 is C n H (2n+2) (wherein n=2-36), and R 3 is —OCOCH═CH 2 or —OCOC(CH 3 )═CH 2 ; (iii) a species defined by the formula R 1 —R 2 —NHCOO—R 3 —OOC—NH—R 2 —R 1 , wherein R 1 is —OCOCH═CH 2 or —OCOC(CH 3 )═CH 2 , R 2 is C n H (2n+2) (wherein n=2-36), and R 3 is C n H (2n+2) (wherein n=2-36); (iv) a species defined by the formula R 1 —NHCONH—R 2 —R 3 , wherein R 1 is C n H (2n+2) (wherein n=4-36), R 2 is C n H (2n+2) (wherein n=2-36), and R 3 is —OCOCH═CH 2 or —OCOC(CH 3 )═CH 2 ; and (v) a species defined by the formula R 1 —R 2 —NHCONH—R 3 —OOC—NH—R 2 —R 1 , wherein R 1 is —OCOCH═CH 2 or —OCOC(CH 3 )═CH 2 , R 2 is C n H (2n+2) (wherein n=2-36), and R 3 is C n H (2n+2) (wherein n=2-36).

14 . The method of claim 1 , wherein the reactive component comprises a nitrogen-containing ring.

15 . The method of claim 1 , wherein the reactive component is an isocyanurate.

16 . The method of claim 1 , wherein the reactive component is tris(2-hydroxy ethyl)isocyanurate triacrylate.

17 . The method of claim 1 , wherein the reactive component comprises 5 to 50 percent by weight of the build material.

18 . The method of claim 1 , wherein the reactive component comprises 5 to 15 percent by weight of the build material.

19 . The method of claim 1 , wherein the reactive component exhibits a melting point range of 1° C. to 10° C., centered between 40° C. and 100° C.

20 . The method of claim 1 , wherein the at least one diluent contains one or more (meth)acrylate moieties.

Assignees

• 3D Systems Inc

Inventors

• Xu Pingyong
• Stockwell John

Classifications

• C08G18/8175

  with esters of acrylic or alkylacrylic acid having only one group containing active hydrogen · CPC title

• C08L75/16

  having terminal carbon-to-carbon unsaturated bonds · CPC title

• B33Y10/00

  Processes of additive manufacturing · CPC title

• Y10T428/24802

  Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] · CPC title

• B33Y50/02

  for controlling or regulating additive manufacturing processes · CPC title