Formulation of di(4-tert-butylcyclohexyl) peroxydicarbonate

Patent metadata

Field	Value
Publication number	US-11629240-B2
Application number	US-201816955537-A
Country	US
Kind code	B2
Filing date	Dec 14, 2018
Priority date	Dec 19, 2017
Publication date	Apr 18, 2023
Grant date	Apr 18, 2023

Abstract

Powder formulation comprising 20-75 wt % of di(4-tert-butylcyclohexyl) peroxydicarbonate and 25-80 wt % of a phlegmatizer selected from the group consisting of ethylene glycol dibenzoate, phenyl benzoate, trimethylol propane tribenzoate, dimethylsulfon, ethylene glycol ditoluate, 1,3-propanediol ditoluate, ethylene glycol 4-tert-butylbenzoate, ethylene glycol monobenzoate monotoluate, 2,3-butanediol dibenzoate, 4-methylphenyl benzoate acid ester, and combinations thereof.

First claim

What is claimed is:

1. A powder formulation comprising:
20-75 wt % of di(4-tert-butylcyclohexyl) peroxydicarbonate, and
25-80 wt % of a phlegmatizer,
wherein the phlegmatizer comprises one or more of ethylene glycol dibenzoate, phenyl benzoate, trimethylol propane tribenzoate, dimethylsulfon, ethylene glycol ditoluate, 1,3-propanediol ditoluate, ethylene glycol 4-tert-butylbenzoate, ethylene glycol monobenzoate monotoluate, 2,3-butanediol dibenzoate, and 4-methylphenyl benzoate acid ester,
wherein the di(4-tert-butylcyclohexyl) peroxydicarbonate has a particle size d 90 of less than 100 microns, and the phlegmatizer has a particle size d 90 less 500 microns.

2. The powder formulation according to claim 1 comprising:
50-75 wt % of the di(4-tert-butylcyclohexyl) peroxydicarbonate; and
25-50 wt % of the phlegmatizer.

3. The powder formulation according to claim 2 , wherein the phlegmatizer comprises ethylene glycol dibenzoate and/or phenyl benzoate.

4. The powder formulation according to claim 3 , wherein d 90 of the di(4-tert-butylcyclohexyl) peroxydicarbonate is 1-40 microns and d 90 of the phlegmatizer is 150-250 microns.

5. The powder formulation according to claim 1 comprising:
60-70 wt % of the di(4-tert-butylcyclohexyl) peroxydicarbonate; and
30-40 wt % of the phlegmatizer.

6. The powder formulation according to claim 5 , wherein the phlegmatizer comprises ethylene glycol dibenzoate.

7. The powder formulation according to claim 1 , further comprising 0.1-5.0 wt % of an anti-caking agent.

8. The powder formulation according to claim 7 , wherein the anti-caking agent comprises silica.

9. The powder formulation according to claim 7 , substantially free of other components.

10. The powder formulation according to claim 1 , comprising essentially no water.

11. The powder formulation according to claim 1 , consisting of the di(4-tert-butylcyclohexyl) peroxydicarbonate, the phlegmatizer, and an anti-caking agent.

12. The powder formulation according to claim 1 , wherein d 90 of the di(4-tert-butylcyclohexyl) peroxydicarbonate is 1-40 microns and d 90 of the phlegmatizer is 150-250 microns.

13. A process for the production of a powder formulation according to claim 1 , comprising the step of physically mixing neat di(4-tert-butylcyclohexyl) peroxydicarbonate powder with the phlegmatizer.

14. The process according to claim 13 , comprising adding a part of the phlegmatizer to a mixing device, thereafter adding the di(4-tert-butylcyclohexyl) peroxydicarbonate to the mixing device, and then adding the remaining part of the phlegmatizer to the mixing device.

15. A process for curing an unsaturated resin, comprising the step of adding the powder formulation of claim 1 to the resin and heating the resulting mixture at a temperature of 60-140° C.

16. The process according to claim 15 , wherein the phlegmatizer comprises phenyl benzoate.

17. The process according to claim 15 , wherein the resin comprises a polyester resin.

18. The process according to claim 15 , wherein the resin comprises a vinyl ester resin or an acrylate resin.

19. The powder formulation according to claim 1 , wherein the phlegmatizer comprises ethylene glycol dibenzoate and/or phenyl benzoate.

20. The powder formulation according to claim 19 , wherein d 90 of the di(4-tert-butylcyclohexyl) peroxydicarbonate is 1-40 microns and d 90 of the phlegmatizer is 150-250 microns.

Assignees

• Nouryon Chemicals Int Bv

Inventors

• Spijkerman Geesje Klasina
• Talma Auke Gerardus
• Majoor Markus Oliver
• Den Braber Antonie
• Jansen Martin Hermanus Maria

Classifications

• C08K5/105

  with phenols · CPC title

• C08K3/36

  Silica · CPC title

• C07C407/006

  Stabilisation; Use of additives · CPC title

• C07C409/32

  the —O—O— group being bound between two >C=O groups · CPC title

• C08K5/14 Primary

  Peroxides · CPC title