Cyanate ester kit for a thermally stable object

Patent metadata

Field	Value
Publication number	US-11613071-B2
Application number	US-202117561764-A
Country	US
Kind code	B2
Filing date	Dec 24, 2021
Priority date	Sep 28, 2018
Publication date	Mar 28, 2023
Grant date	Mar 28, 2023

Abstract

A formulation system usable in additive manufacturing of a three-dimensional object that comprises, in at least a portion thereof, a cyanate ester-containing polymeric network, and additive manufacturing processes employing the formulation system are provided. Also provided are objects obtainable by the additive manufacturing and kits containing the formulation system. The formulation system includes a first modeling material formulation which includes a first curable material which is a thermally-curable cyanate ester and a second modeling material formulation which comprises an activating agent for promoting polymerization of the cyanate ester and is devoid of the first curable material, and further includes a second curable material which is different from the first curable material, and optionally an agent for promoting hardening of the second curable material.

First claim

What is claimed is:

1. A kit comprising at least a first modeling material formulation and a second modeling material formulation, said first modeling material formulation comprising a first curable material which is a thermally-curable cyanate ester and said second modeling material formulation comprising an activating agent for promoting polymerization of said cyanate ester and is devoid of said first curable material, the at least first and second modeling material formulations further comprising a second curable material being different from said first curable material, and optionally an agent for promoting hardening of said second curable material,
said at least first and second modeling material formulations being for use in additive manufacturing of a three-dimensional object that comprises, in at least a portion thereof, a cyanate ester-containing polymeric network.

2. The kit of claim 1 , wherein said first and said second modeling material formulations are separately packaged within the kit.

3. The kit of claim 1 , wherein said first formulation comprises said first curable material and said agent for promoting polymerization of said second curable material.

4. The kit of claim 1 , wherein said second formulation comprises said second curable material and said agent for promoting polymerization of said cyanate ester.

5. The kit of claim 1 , wherein said second curable material is a photocurable material, and said agent for promoting hardening of said second curable material is a photoinitiator.

6. The kit of claim 5 , wherein said photocurable material features, when hardened, Tg of at least 150° C.

7. The kit of claim 1 , wherein said second curable material is or comprises an acrylic material.

8. The kit of claim 7 , wherein said acrylic material comprises a di-functional and/or a multi-functional acrylic material.

9. The kit of claim 1 , wherein said agent for promoting polymerization of said cyanate ester is inactive or is partially active towards promoting polymerization of said cyanate ester when in the kit.

10. The kit of claim 9 , wherein said at least first and second modeling material formulations further comprise an agent that activates said agent for promoting polymerization of said cyanate ester.

11. The kit of claim 1 , wherein said agent for promoting polymerization of said cyanate ester comprises a nucleophilic group.

12. The kit of claim 11 , wherein said nucleophilic group is thiol or amine.

13. The kit of claim 1 , wherein said agent for promoting polymerization of said cyanate ester is an aromatic amine.

14. The kit of claim 1 , wherein said agent for promoting polymerization of said cyanate ester is an aromatic secondary amine.

15. The kit of claim 1 , wherein said second formulation further comprises a metal species that promotes polymerization of said cyanate ester.

16. The kit of claim 1 , wherein said at least first and second modeling material formulations further comprise an additional curable material which is capable of interacting with said cyanate ester to thereby form a co-polymeric network.

17. The kit of claim 16 , wherein said additional curable material is or comprises an epoxy-containing curable material.

18. The kit of claim 16 , wherein said additional curable material features a viscosity lower than 1,000, or lower than 500, centipoises, at room temperature.

19. The kit of claim 5 , wherein said first formulation comprises said first curable material and said photoinitiator and said second formulation comprises a multi-functional acrylic material that features, when hardened, a Tg of at least 150° C., and an aromatic amine.

20. The kit of claim 19 , wherein a total amount of said multi-functional acrylic material ranges from 20 to 40, or from 20 to 30, or from 25 to 30, % by weight, of the total weight of said first and second formulations.

21. The kit of claim 19 , wherein an amount of said aromatic amine ranges from 2 to 4, % by weight of the total weight of said first and second formulations.

22. The kit of claim 19 , wherein an amount of said photoinitiator ranges from 0.5 to 1.5%, by weight, of the total weight of said first and second formulations.

23. The kit of claim 19 , wherein said at least first and second modeling material formulations further comprise an additional curable material that is capable of interacting with said cyanate ester.

24. The kit of claim 23 , wherein said first formulation is devoid of said additional curable material.

25. The kit of claim 23 , wherein a total amount of said first curable material and said additional curable material, if present, ranges from 50 to 80, or from 60 to 80, or from 60 to 70, %, by weight, of the total weight of said first and second formulations.

Assignees

• Stratasys Ltd

Inventors

• Kuno Lev

Classifications

• B33Y70/00

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• C09D11/36

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