Cationically curing two component materials containing a noble metal catalyst
View Patent ↗The invention relates to two-component preparations comprising epoxy compounds and a noble metal species, in particular for the preparation of dental compositions. The invention particularly relates to two-component dental compositions which comprise epoxy compounds and are cured by cationic polymerization in the presence of a noble metal species.
1. A composition comprising at least two components, A and B, wherein at least one of the components, A or B, comprises an epoxy compound and at least one of the components, A or B, comprises a starter that is able to cationically cure the epoxy compound wherein the component that does not comprise the starter comprises a noble metal species comprising a complex or colloid of a metal selected from the group consisting of Pt, Pd, Rh, Ir, Os, Ru or mixture of two or more of these metals.
2. The composition according to claim 1 , wherein the starter is a latent starter.
3. The composition according to claim 2 , wherein the starter is a latent Lewis or Bronstedt acid.
4. The composition according to claim 1 , wherein the starter is an onium salt.
5. The composition according to claim 4 , wherein the starter is a halonium salt.
6. The composition according to claim 1 , wherein the complex or colloid is essentially free of detectable metal-metal bonds.
7. The composition according to claim 1 , wherein the noble metal species is a complex comprising a metal selected from the group consisting of Pt, Pd, Rh or a mixture of two or more such metals, in a low oxidation state, or said noble metal species comprises a mixture of two or more of such complexes.
8. The composition according to claim 7 , where in the complex comprises a metal selected from the group consisting of Pt(0), Pt(II), Rh(0), Rh(I), Pd(0), Pd(II) or a mixture of two or more such metals.
9. The composition according to claim 1 , wherein the noble metal species has at least one olefinic ligand.
10. A method of making a dental material, comprising mixing at least two components, A and B, wherein at least one of the components, A or B, comprises an epoxy compound and at least one of components, A or B, comprises a starter able to cationically cure the epoxy compound, and wherein the component which does not comprise the starter comprises a noble metal species comprising a complex or colloid of a metal selected from the group consisting of Pt, Pd, Rh, Ir, Os, Ru, or mixture of two or more of these metals.
11. The method according to claim 10 , wherein a latent Lewis or Bronstedt acid is used as a starter.
12. A method of initiating a cationic polymerization of an epoxy compound by combining an epoxy compound, a starter, and a noble metal species comprising a complex or colloid of a metal selected from the group consisting of Pt, Pd, Rh, It, Os, Ru or a mixture of two or more of these metals, wherein the stater is an onium salt.
13. A kit comprising at least two components, A and B, in separate containers, wherein at least one of the components, A or B, comprises an epoxy compound and at least one of the components, A or B, comprises a starter able to cationically cure the epoxy compound, wherein the component that does not comprise the starter comprises a noble metal species capable of catalyzing a hydrogenation or hydrosilation reaction.
14. A dental material comprising at least two components, A and B, wherein at least one of the components, A or B, comprises an epoxy compound and at least one of the components, A or B, comprises a starter that is able to cationically cure the epoxy compound wherein the component tat does not comprise the starter comprises a noble metal species capable of catalyzing a hydrogenation or hydrosilation reaction.
15. A dental material obtained by the method comprising mixing at least two components, A and B, wherein at least one of the components, A or B, comprises an epoxy compound and at least one of components, A or B, comprises a starter able to cationically cure the epoxy compound, and wherein the component which does not comprise the starter comprises a noble metal species capable of catalyzing a hydrogenation or hydrosilation reaction.
16. The dental material according to claim 14 , wherein the starter is a latent starter.
17. The dental material according to claim 16 , wherein the starter is a latent Lewis or Bronstedt acid.
18. The dental material according to claim 14 , wherein the starter is an onium salt.
19. The dental material according to claim 18 , wherein the starter is a halonium salt.
20. The dental material according to claim 14 , wherein the noble metal species is a complex or colloid of a metal selected from the group consisting of Pt, Pd, Rh, Ir, Os, Ru or mixture of two or more of these metals.
21. The dental material according to claim 14 , wherein the complex or colloid is essentially free of detectable metal-metal bonds.
22. The dental material according to claim 14 , wherein the noble metal species is a complex comprising a metal selected from the group consisting of Pt, Pd, Rh or a mixture of two or more such metals, in a low oxidation state, or said noble metal species comprises a mixture of two or more of such complexes.
23. The dental material according to claim 22 , wherein the complex comprises a metal selected from the group consisting of Pt(0), Pt(II), Rh(0), Rh(I), Pd(0), Pd(II) or a mixture of two or more such metals.
24. The dental material according to claim 14 , wherein the noble metal species has at least one olefinic ligand.