D1492 liquid BAPO photoinitiator and its use in radiation curable compositions
View Patent ↗The invention relates to a liquid bis(acyl)phosphine oxide of formula (I): wherein R is C 1 -C 18 alkyl, and wherein R is optionally substituted as described herein. The invention also relates to radiation curable compositions comprising liquid bis(acyl)phosphine oxide of formula (I).
1. A liquid bis(acyl)phosphine oxide of formula (I):
wherein R is C 1 -C 18 alkyl, and wherein R is optionally substituted.
2. The bis(acyl)phosphine oxide of claim 1 , wherein R is C 1 -C 6 alkyl.
3. The bis(acyl)phosphine oxide of claim 2 , wherein R is selected from the group consisting of methyl, ethyl, n-propyl, 2-propyl, n-butyl, sec-butyl, t-butyl, and hexyl.
4. The bis(acyl)phosphine oxide of claim 2 , wherein R is C 1 -C 3 alkyl.
5. The bis(acyl)phosphine oxide of claim 4 , wherein R is selected from the group consisting of methyl, ethyl and n-propyl.
6. The bis(acyl)phosphine oxide of claim 5 , wherein R is ethyl.
7. A radiation curable composition comprising the bis(acyl)phosphine oxide of claim 1 and at least one free-radical polymerizable component.
8. The radiation curable composition of claim 7 , wherein said composition is selected from the group consisting of an optical fiber coating composition and a coating composition capable of radiation cure on concrete and a coating composition capable of radiation cure on metal.
9. The radiation curable composition of claim 8 , wherein said composition is an optical fiber coating composition.
10. The radiation curable composition of claim 8 , wherein said composition is a coating capable of radiation cure on concrete.
11. The radiation curable composition of claim 8 , wherein said composition is a coating capable of radiation cure on metal.
12. The radiation curable composition of claim 7 , wherein the composition is curable by UV light generated by a conventional UV light source.
13. The radiation curable composition of claim 7 , wherein the composition is curable by light generated by a LED light source.
14. The radiation curable composition of claim 7 , wherein the composition further comprises at least one additional photoinitiator.
15. The radiation curable composition of claim 14 , wherein the at least one additional photoinitiator is selected from the group consisting of solid photoinitiators and liquid photoinitiators.
16. The radiation curable composition of claim 15 , wherein the solid photoinitiators are selected from the group consisting of 4-methyl benzophenone, p-phenyl benzophenone, 4,4′-bis(dimethylamino)benzophenone, 4-benzoyl-4′-methyl diphenylsulphide, 4,4′-(tetraethyldiamino)benzophenone, 4,4′-(tetraethyldiamino)benzophenone, benzophenone, 2-hydroxy-1-{4-[4-(2-hydroxy-2-methyl-propionyl)-benzyl]-phenyl}-2-methyl-propan-1-one, 1-hydroxycyclohexyl phenyl ketone, 2,2-dimethoxy-2-phenylacetophenone, 4-(2-hydroxyethoxy)phenyl-(2-propyl)ketone, camphorquinone and 2,4,6-trimethylbenzophenone.
17. The radiation curable composition of claim 15 , wherein the liquid photoinitiators are selected from the group consisting of 2,4,6-(trimethylbenzoyl ethoxy, phenyl phosphine) oxide, diethoxy acetophenone, 2-hydroxy-2-methyl-1-phenyl-propane-1-one, methyl phenylglyoxylate and acrylated benzophenone.
18. The radiation curable composition of claim 15 , wherein the at least one additional photoinitiator is a bis(acyl)phosphine.
19. The radiation curable composition of claim 15 , wherein the at least one additional photoinitiator is a stabilized bis(acyl)phosphine.