Process for preparing hydroxyalkyl(meth) acrylates using Lewis acid catalysts
View Patent ↗The present invention relates to a process for preparing hydroxyalkyl (meth)acrylates by reacting at least one compound A which contains at least one epoxide group with at least one compound B which contains at least one carboxylic acid group, wherein A and/or B also contains at least one (meth)acrylate group, in the presence of Lewis acid catalysts, each of which contains at least one directly bonded di(cyclo)alkylamino group.
1. A process for preparing a hydroxyalkyl (meth)acrylate which comprises reacting at least one compound A which contains at least one epoxide group with at least one compound B which contains at least one carboxylic acid group, wherein A and/or B also contains at least one (meth)acrylate group, in the presence of a Lewis acid catalyst which contains at least one directly bonded di(cyclo)alkylamino group.
2. The process of claim 1 wherein 0.05 to 5.0 wt. %, based on the weight of A and B, of a Lewis acid catalyst is used.
3. The process of claim 1 wherein 0.1 to 1.0 wt. %, based on the weight of A and B, of a Lewis acid catalyst is used.
4. The process of claim 1 wherein 0.1 to 0.5 wt. %, based on the weight of A and B, of a Lewis acid catalyst is used.
5. The process of claim 1 wherein the Lewis acid catalyst comprises a boron, aluminium, zirconium and/or silicon compound which contains at least one directly bonded di(cyclo)alkylamino group.
6. The process of claim 1 wherein compound A comprises glycidyl methacrylate and/or glycidyl acrylate.
7. The process of claim 1 wherein compound B comprises acrylic acid and/or methacrylic acid.
8. The process of claim 6 wherein compound B comprises acrylic acid and/or methacrylic acid.
9. The process of claim 1 wherein compound A comprises glycidyl methacrylate and compound B comprises acrylic acid.
10. The process of claim 1 wherein the Lewis acid comprises a boron compound which contains at least one directly bonded di(cyclo)alkylamino group.
11. The process of claim 6 wherein the Lewis acid catalyst comprises a boron compound which contains at least one directly bonded di(cyclo)alkylamino group.
12. The process of claim 7 wherein the Lewis acid catalyst comprises a boron compound which contains at least one directly bonded di(cyclo)alkylamino group.
13. The process of claim 8 wherein the Lewis acid catalyst comprises a boron compound which contains at least one directly bonded di(cyclo)alkylamino group.
14. The process of claim 9 wherein the Lewis acid catalyst comprises a boron compound which contains at least one directly bonded di(cyclo)alkylamino group.
15. The process of claim 1 the Lewis acid catalyst comprises tris-(dimethylamino)-borane.
16. The process of claim 6 the Lewis acid catalyst comprises tris-(dimethylamino)-borane.
17. The process of claim 7 the Lewis acid catalyst comprises tris-(dimethylamino)-borane.
18. The process of claim 8 the Lewis acid catalyst comprises tris-(dimethylamino)-borane.
19. The process of claim 9 the Lewis acid catalyst comprises tris-(dimethylamino)-borane.