Adhesive for 3D printing

• US 9,757,881 B2
• Filed: 11/06/2015
• Issued: 09/12/2017
• Est. Priority Date: 05/18/2012
• Status: Active Grant

• Current Assignee: 3D Systems, Inc. (3D Systems Corporation)
• Original Assignee: 3D Systems, Inc. (3D Systems Corporation)
• Inventors: Tummala, Praveen, Turner, Peter Scott, Johnson, Martin Alan
• Primary Examiner(s): Valdez, Deve E
• Application Number:
  US14/934,860
• Publication Number:
  US 20160059445A1
• Time in Patent Office: 676 Days
• Field of Search: 524503
• CPC Class Codes: B29C 37/0003 Discharging moulded articles from the mould constructions for removing the articles B29C33/44
• CPC Class Codes: B29C 64/106 using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
• CPC Class Codes: B29C 64/118 using filamentary material being melted, e.g. fused deposition modelling [FDM]
• CPC Class Codes: B29C 64/124 using layers of liquid which are selectively solidified
• CPC Class Codes: B29C 64/245 Platforms or substrates support structures intended to be sacrificed after manufacture B29C64/40
• CPC Class Codes: B29C 64/40 Structures for supporting 3D objects during manufacture and intended to be sacrificed after completion thereof
• CPC Class Codes: B29K 2029/04 PVOH, i.e. polyvinyl alcohol B29K2031/04 takes precedence
• CPC Class Codes: B29K 2033/04 Polymers of esters
• CPC Class Codes: B33Y 10/00 Processes of additive manufacturing
• CPC Class Codes: C08G 73/0233 Polyamines derived from (poly)oxazolines, (poly)oxazines or having pendant acyl groups
• CPC Class Codes: C08L 29/04 Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
• CPC Class Codes: C08L 79/02 Polyamines
• CPC Class Codes: C09J 129/04 Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
• CPC Class Codes: C09J 129/10 Homopolymers or copolymers of unsaturated ethers C09J135/08 takes precedence
• CPC Class Codes: C09J 133/08 Homopolymers or copolymers of acrylic acid esters
• CPC Class Codes: C09J 177/00 Adhesives based on polyamides obtained by reactions forming a carboxylic amide link in the main chain based on polyhydrazides C09J179/06; based on polyamide-imides C09J179/08; Adhesives based on derivatives of such polymers
• CPC Class Codes: C09J 179/00 Adhesives based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen, or carbon only, not provided for in groups C09J161/00 - C09J177/00
• CPC Class Codes: C09J 179/02 Polyamines

Abstract

In one aspect, adhesives for use with a 3D printer are described herein. In some embodiments, an adhesive for use with a 3D printer comprises a first polymeric component comprising a poly(vinyl alcohol) and a second polymeric component. The poly(vinyl alcohol), in some embodiments, comprises amorphous poly(vinyl alcohol). In some embodiments, the second polymeric component comprises a water-soluble polymer. Further, in some embodiments, an adhesive described herein further comprises a solvent, a surfactant, and/or a preservative.

Claims

1. A method of printing a 3D article comprising:

applying an adhesive to a build surface of a print pad of a 3D printer to provide a layer of the adhesive on the build surface of the print pad, the adhesive comprising;

a first polymeric component comprising one or more of a methyl vinyl ether/maleic anhydride co-polymer, a poly(2-oxazoline), poly(2-ethyl-2-oxazoline), poly(2-ethyl-oxazoline), and polymethyl acrylate; and

a solvent,

wherein the first polymeric component is present in the adhesive in an amount between 5 and 50 weight percent, based on the total weight of the adhesive, and

wherein the adhesive is applied to the build surface of the print pad prior to beginning a print process.

2. The method of claim 1 further comprising:

selectively depositing layers of a fluid print material onto the build surface of the print pad to form the 3D article; and

removing the 3D article from the print pad,

wherein removing the 3D article from the print pad comprises altering the adhesive property of the adhesive.

3. The method of claim 1, wherein the build surface of the print pad comprises an anodized aluminum surface, a glass surface, or a polycarbonate surface.

4. The method of claim 1, wherein the first polymeric component is a methyl vinyl ether/maleic anhydride co-polymer.

5. The method of claim 1, wherein the first polymeric component is a poly(2-oxazoline), poly(2-ethyl-2-oxazoline), or poly(2-ethyl-oxazoline).

6. The method of claim 1, wherein the first polymeric component is polymethyl acrylate.

7. The method of claim 1, wherein the adhesive further comprises a second polymeric component.

8. The method of claim 7, wherein the second polymeric component comprises an amorphous poly(vinyl alcohol).

9. The method of claim 1, wherein the solvent comprises deionized water.

10. The method of claim 1, wherein the solvent comprises one or more of acetone, ethanol, methanol, ethylene glycol, propylene glycol, triethylene glycol, glycerin, acetamide, dimethyl acetamide, dimethyl sulfoxide, methyl ethyl ketone, methylene chloride, and combinations or mixtures thereof.

11. The method of claim 1, wherein the adhesive further comprises a surfactant.

12. The method of claim 1, wherein the adhesive further comprises a preservative.

13. The method of claim 2, wherein altering the adhesive property of the adhesive comprises changing the temperature of the adhesive.

14. The method of claim 2, wherein altering the adhesive property of the adhesive comprises exposing the adhesive to water.

15. A method of printing a 3D article comprising:

applying an adhesive to a build surface of a print pad of a 3D printer to provide a layer of the adhesive on the build surface of the print pad, the adhesive comprising;

a first polymeric component comprising an amorphous poly(vinyl alcohol); and

a second polymeric component,

wherein the adhesive is applied to the build surface of the print pad prior to beginning a print process.

16. The method of claim 15, wherein the poly(vinyl alcohol) is present in the adhesive in an amount between 3 and 20 weight percent, based on the total weight of the adhesive, and the second polymeric component is present in the adhesive in an amount between 30 and 50 weight percent, based on the total weight of the adhesive.

17. The method of claim 15, wherein the poly(vinyl alcohol) is present in the adhesive in an amount between 3 and 10 weight percent, based on the total weight of the adhesive.

18. The method of claim 15, wherein the adhesive further comprises a solvent, a surfactant, and a preservative, and wherein the solvent is present in the adhesive in an amount between 50 and 95 weight percent, the surfactant is present in the adhesive in an amount between 0.01 and 0.5 weight percent, and the preservative is present in the adhesive in an amount between 0.01 and 0.5 weight percent, based on the total weight of the adhesive.

19. The method of claim 15, wherein the adhesive has a bonding strength that is at least 10 times greater at 100°

C. than at room temperature or a bonding strength that is at least 10 times greater when dry at 23°

C. than when wet at 23°

C.

20. The method of claim 15, wherein the adhesive has a glass transition temperature below 100°

C.