Thermoresponsive suspension composites for 3D printing

Patent metadata

Field	Value
Publication number	US-11951682-B2
Application number	US-202117529763-A
Country	US
Kind code	B2
Filing date	Nov 18, 2021
Priority date	Nov 18, 2021
Publication date	Apr 9, 2024
Grant date	Apr 9, 2024

Abstract

A thermoresponsive suspension composition for use in additive manufacturing includes an aqueous suspension of a thermosetting resin, a crosslinking agent configured to react with the thermosetting resin, and a mineral particulate, wherein the thermosetting resin and crosslinking agent react at or above a trigger temperature.

First claim

What is claimed is:

1. A thermoresponsive suspension composition for use in additive manufacturing, the composition comprising an aqueous suspension of a thermosetting resin, a crosslinking agent configured to react with the thermosetting resin, and a mineral particulate, wherein the crosslinking agent comprises a thiol-terminated polymer having one or more thiol groups and the thermosetting resin and crosslinking agent react at or above a trigger temperature.

2. The thermoresponsive suspension composition of claim 1 , wherein the mineral particulate is a mineral particulate common to cementitious compositions.

3. The thermoresponsive suspension composition claim 1 , wherein the mineral particulate comprises quartz, calcite, portlandite, Portland cement, gypsum, calcium aluminate cement, calcium sulfoaluminate cement, fly ash, ground granulated blast furnace slag, calcined clay, limestone, recycled concrete, or a mixture of any two or more thereof.

4. The thermoresponsive suspension composition of claim 1 , wherein the thermosetting resin comprises an epoxy resin, a polyisocyanate resin, an acrylic resin, or a mixture of any two or more thereof.

5. The thermoresponsive suspension composition of claim 1 , wherein the thermosetting resin comprises an epoxy resin and the epoxy resin comprises at least two epoxy functional groups.

6. The thermoresponsive suspension composition of claim 1 , wherein the thermosetting resin comprises from about 1% to about 50% by mass of the mineral particulate of the composition.

7. The thermoresponsive suspension composition of claim 1 , wherein the crosslinking agent further comprises an amine-containing molecule, an alcohol-containing molecule, or a mixture of any two or more thereof.

8. The thermoresponsive suspension composition of claim 1 , wherein a mass ratio of crosslinking agent to thermosetting resin is about 0.5 to 2.

9. The thermoresponsive suspension composition of claim 1 , wherein the composition exhibits a solid mass fraction from 0.50 to 0.85.

10. The thermoresponsive suspension composition of claim 1 , further comprising a dispersing agent.

11. The thermoresponsive suspension composition of claim 10 , wherein the dispersing agent comprises a comb copolymer comprising a polyethylene glycol moiety and a charge bearing moiety, polysulfonate, or a mixture thereof.

12. The thermoresponsive suspension composition of claim 10 , wherein the dispersing agent is present from about 0.1% to about 5% dry mass of dispersant by mass of the mineral particulate.

13. The thermoresponsive suspension composition of claim 1 further comprising a cross-linking initiator.

14. The thermoresponsive suspension composition of claim 13 , wherein the cross-linking initiator is a nucleophilic initiator with low basicity.

15. The thermoresponsive suspension composition of claim 13 , wherein the cross-linking initiator comprises 1-methylimidazole, benzyldimethylamine, or a mixture thereof.

16. The thermoresponsive suspension composition of claim 13 , wherein the cross-linking initiator is present at about 0.5% to about 10% mass of initiator by dry mass of resin.

17. The thermoresponsive suspension composition of claim 1 , wherein the trigger temperature of the thermoresponsive suspension composition is from about 30° C. to about 90° C.

18. The thermoresponsive suspension composition of claim 1 , wherein at or above the trigger temperature, the thermoresponsive suspension composition exhibits stiffening rate of about 5 Pa/s to about 500 kPa/s, and/or wherein the thermoresponsive suspension composition exhibits a pH from about 4 to about 13.

19. The thermoresponsive suspension composition of claim 11 , wherein the comb copolymer comprising a polyethylene glycol moiety and a charge bearing moiety is a polycarboxylate ether.

Assignees

• Univ California
• Technical Univ Of Munich
• Master Builders Solutions Admixtures Us Llc

Inventors

• Sant Gaurav
• Kandy Sharu Bhagavathi
• Gädt Torben
• Mehdipour Iman
• Ranganathan Thiyagarajan
• Srivastava Samanvaya
• Seiler Paul

Classifications

• 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

• B33Y10/00

  Processes of additive manufacturing · CPC title

• B33Y70/00

  Materials specially adapted for additive manufacturing · CPC title

• B33Y80/00

  Products made by additive manufacturing · CPC title

• C08G59/245 Primary

  aromatic · CPC title