Flame-retardant microcapsule containing cyclic phosphazene

Patent metadata

Field	Value
Publication number	US-10253166-B2
Application number	US-201715697596-A
Country	US
Kind code	B2
Filing date	Sep 7, 2017
Priority date	Sep 7, 2017
Publication date	Apr 9, 2019
Grant date	Apr 9, 2019

Abstract

A flame-retardant microcapsule with a shell containing a cyclic phosphazene molecule, a process for forming a flame-retardant microcapsule with a shell containing a cyclic phosphazene molecule, and an article of manufacture including a flame-retardant microcapsule with a shell containing a cyclic phosphazene molecule are disclosed. The process for forming the flame-retardant microcapsule with the shell containing the cyclic phosphazene molecule may include providing a cyclic phosphazene molecule, forming an aqueous mixture containing the cyclic phosphazene molecule, adding a payload agent into the aqueous mixture, and adding a curing agent into the aqueous mixture.

First claim

What is claimed is:

1. A flame-retardant microcapsule with a shell containing a cyclic phosphazene molecule, the cyclic phosphazene molecule with a formula of:

wherein each M is a first variable substituent.

2. The flame-retardant microcapsule of claim 1 , wherein the M has a formula of:

wherein L is a second variable substituent.

3. The flame-retardant microcapsule of claim 2 , wherein the L is selected from the group consisting of substituents with formulas of:

wherein R is a third variable substituent; and
wherein X is a fourth variable substituent.

4. The flame-retardant microcapsule of claim 3 , wherein the R is a substituent comprising at least one of:
a hydrogen molecule, a vinyl group, an allyl group, an epoxy group, an acrylate group, a phenyl acrylic acid, and an acryloyl acid.

5. The flame-retardant microcapsule of claim 3 , wherein the fourth variable substituent X is a substituent comprising at least one of:
the R, a hydroxide molecule, and an amidogen molecule.

6. The flame-retardant microcapsule of claim 1 , wherein the cyclic phosphazene molecule has orthogonal functionality.

7. The flame-retardant microcapsule of claim 6 , wherein the cyclic phosphazene molecule is covalently bonded into a polymeric matrix.

8. A process of forming a flame-retardant microcapsule with a shell containing a cyclic phosphazene molecule, comprising:
providing the cyclic phosphazene molecule;
forming an aqueous mixture containing the cyclic phosphazene molecule;
adding a payload agent into the aqueous mixture; and
adding a curing agent into the aqueous mixture.

9. The process of claim 8 , wherein providing the cyclic phosphazene molecule includes functionalizing an unfunctionalized cyclic phosphazene molecule, wherein the cyclic phosphazene molecule is a functionalized cyclic phosphazene molecule.

10. The process of claim 9 , wherein functionalizing the unfunctionalized cyclic phosphazene molecule is a reaction including at least one of functionalized aryl alcohols and functionalized aliphatic alcohols.

11. The process of claim 8 , wherein the payload agent is a latent curing agent.

12. The process of claim 8 , wherein the payload agent is selected from the group consisting of: cyclic olefins, norbornene, substituted norbornene, cyclooctadiene, substituted cyclooctadiene, lactones, acrylates, acrylic acids, styrenes, isoprene, butadiene, and epoxies.

13. The process of claim 8 , further comprising:
adding one or more solvents into the aqueous mixture, the one or more solvents including at least one of aprotic solvents and protic solvents.

14. The process of claim 8 , further comprising:
adding a cross-linking agent into the aqueous mixture to generate the shell around the payload agent.

15. The process of claim 8 , wherein the cyclic phosphazene molecule has a formula of:

wherein each M is a first variable substituent.

16. The process of claim 15 , wherein the M has a formula of:

wherein L is a second variable substituent.

17. The process of claim 16 , wherein the L is selected from the group consisting of substituents with formulas of:

wherein R is a third variable substituent; and
wherein X is a fourth variable substituent.

18. An article of manufacture, comprising a flame-retardant microcapsule with a shell containing a cyclic phosphazene molecule.

19. The article of manufacture of claim 18 , wherein the shell is covalently bound into a polymeric matrix.

20. The article of manufacture of claim 18 , wherein the cyclic phosphazene molecule has a formula of:

wherein each M is a first variable substituent.

Assignees

• IBM

Inventors

• Wertz Jason T
• Kobilka Brandon M
• Porter Jacob T
• Kuczynski Joseph

Classifications

• C07F9/6521

  Six-membered rings · CPC title

• C08K5/5399 Primary

  Phosphorus bound to nitrogen · CPC title

• C08G79/025 Primary

  Polyphosphazenes · CPC title

• C07F9/222

  Amides of phosphoric acids · CPC title

• C07F9/65815

  n = 3 · CPC title