Process for manufacturing a cross-linked product

Patent metadata

Field	Value
Publication number	US-11807722-B2
Application number	US-202017036603-A
Country	US
Kind code	B2
Filing date	Sep 29, 2020
Priority date	Sep 30, 2019
Publication date	Nov 7, 2023
Grant date	Nov 7, 2023

Abstract

A process for manufacturing a cross-linked product has improved charring and thermal stability properties in which there is cross-linking of a benzoxazine monomer.

First claim

The invention claimed is:

1. A process for manufacturing a cross-linked product comprising the cross-linking of a benzoxazine monomer of formula A provided below:

in this formula:
A 1 is selected from: (i) saturated, unsaturated or aromatic, monocyclic or polycyclic carbocyclic or heterocyclic groups, substituted by a cross-linkable group, (ii) saturated or unsaturated, linear or branched hydrocarbon chains, optionally interrupted by one or more heteroatoms, substituted by a cross-linkable group, in the alternative (i) or (ii), said cross-linkable group is selected from: a hydroxyl group, an amine group, a maleimide group, an acetylene group, an allyl group, a carbonitrile group, a phthalimide group, a phthalonitrile group, an epoxy group,
R 1 a is selected from: substituted or unsubstituted furfuryl groups, saturated, unsaturated or aromatic, monocyclic or polycyclic, substituted or unsubstituted carbocyclic or heterocyclic groups, substituted or unsubstituted aralkyl groups, linear or branched, saturated or unsaturated, substituted or unsubstituted hydrocarbon chains, optionally interrupted by one or more heteroatoms,
n a is an integer comprised between 0 and 2,
R 2 a is selected from: electron-withdrawing groups, saturated or unsaturated, substituted or unsubstituted, linear or branched hydrocarbon chains comprising between 1 and 6 carbon atoms, optionally interrupted by one or more heteroatoms, saturated, unsaturated or aromatic, substituted or unsubstituted carbocyclic or heterocyclic groups.

2. The process as claimed in claim 1 , wherein A 1 is a monocyclic or polycyclic aromatic carbocyclic or aromatic heterocyclic group substituted by the cross-linkable group.

3. The process as claimed in claim 2 , wherein A 1 is a benzene ring substituted by the cross-linkable group.

4. The process as claimed in claim 1 , wherein the cross-linkable group is a hydroxyl group.

5. The process as claimed in claim 1 , wherein R 1 a is selected from: substituted or unsubstituted furfuryl groups, monocyclic or polycyclic, substituted or unsubstituted carbocyclic aromatic or heterocyclic aromatic groups, substituted or unsubstituted aralkyl groups.

6. The process as claimed in claim 5 , wherein R 1 a is a substituted or unsubstituted furfuryl group.

7. The process as claimed in claim 1 , wherein n a is equal to 0.

8. A rocket nozzle obtained by using a cross-linked product obtained by the process as claimed in claim 1 .

9. A re-entry vehicle obtained by using a cross-linked product obtained by the process as claimed in claim 1 .

Assignees

• Arianegroup Sas
• Centre Nat Rech Scient

Inventors

• Tavernier Romain
• Granado Lérys
• David Ghislain
• Caillol Sylvain
• Foyer Gabriel

Classifications

• C08G73/22 Primary

  Polybenzoxazoles · CPC title

• B64G1/14

  Space shuttles {(reusable launch rockets B64G1/006)} · CPC title

• B64G1/40

  Arrangements or adaptations of propulsion systems · CPC title

• C07D413/06 Primary

  linked by a carbon chain containing only aliphatic carbon atoms · CPC title

• C08G61/12

  Macromolecular compounds containing atoms other than carbon in the main chain of the macromolecule · CPC title