Initiators and use thereof for cationic photopolymerization

Patent metadata

Field	Value
Publication number	US-10266643-B2
Application number	US-201615757008-A
Country	US
Kind code	B2
Filing date	Sep 2, 2016
Priority date	Sep 2, 2015
Publication date	Apr 23, 2019
Grant date	Apr 23, 2019

Abstract

The invention relates to the use of aryliodonium and/or arylsulfonium salts of the tetrakis(perfluoro-t-butyloxy)aluminate anion of the following formula (I):

as cationic initiators cleavable by light and/or free radicals for polymerizing cationically polymerizable monomers.

First claim

The invention claimed is:

1. Diphenyliodonium-tetrakis(perfluoro-t-butyloxy)aluminate of the following formula (II):

2. Triphenylsulfonium-tetrakis(perfluoro-t-butyloxy)aluminate, optionally substituted with phenylthio and 4-diphenylsulfoniophenylthio, of the following formula (III):

3. Tris(4-((4-acetylphenyl)thio)phenyl)sulfonium-tetrakis(perfluoro-t-butyl-oxy)aluminate of the following formula (IV):

4. A method of polymerizing cationically polymerizable monomers comprising using aryliodonium and/or arylsulfonium salts of the tetrakis-(perfluoro-t-butyloxy)aluminate anion of the following formula (I):

as cationic initiators cleavable by light and/or free radicals.

5. The method according to claim 4 , wherein diphenyliodonium-tetrakis-(perfluoro-t-butyloxy)aluminate of the following formula (II) is used as a cationic initiator:

6. The method according to claim 4 , wherein triphenylsulfonium-tetrakis-(perfluoro-t-butyloxy)aluminate of the following formula (III), optionally substituted with phenylthio or 4-diphenylsulfoniophenylthio, is used as a cationic initiator:

7. The method according to claim 4 , wherein tris(4-((4-acetylphenyl)-thio)phenyl)sulfonium-tetrakis(perfluoro-t-butyloxy)aluminate of the following formula (IV) is used as a cationic initiator:

8. The method according to claim 4 , wherein the cationic polymerization is carried out as a ring-opening polymerization.

9. The method according to claim 8 , wherein mono- or multivalent epoxides (oxiranes), thiiranes (epi sulfides), oxetanes, lactames, lactones, lactide, glycolide, tetrahydrofuran, or mixtures thereof are used as cationically polymerizable monomers.

10. The method according to claim 9 , wherein one or more multivalent epoxides are used as cationically polymerizable monomers.

11. The method according to claim 4 , wherein one or more multivalent vinyl ethers are used as cationically polymerizable monomers.

12. The method according to claim 4 , wherein a reaction mixture to be polymerized further comprises one or more components selected from additional initiators, additional monomers, sensitizers, stabilizers, modifiers, regulators, solvents, fillers, dyes, pigments, and mixtures thereof.

13. The method according to claim 12 , wherein the reaction mixture further comprises at least one thermal free radical initiator; and wherein the polymerization reaction is performed as a frontal polymerization.

Assignees

• Univ Wien Tech
• Univ Freiburg Albert Ludwigs

Inventors

• Liska Robert
• Bomze Daniel
• Krossing Ingo
• Knaack Patrick

Classifications

• C08G65/105

  Onium compounds · CPC title

• C08G59/68

  characterised by the catalysts used · CPC title

• C08G59/687

  containing sulfur · CPC title

• C01F7/02

  Aluminium oxide; Aluminium hydroxide; Aluminates · CPC title

• C01F7/50

  Fluorides · CPC title