Patent ID: 8962792
Filing Date: 2015-02-24
Classification: C07D,C08G,Y02P

Abstract:
1. A process for preparing an aliphatic or cycloaliphatic epoxy resin comprising the steps of: (I) reacting a mixture of (i) an aliphatic or cycloaliphatic hydroxyl containing material, (ii) an epihalohydrin, (iii) a basic acting substance, (iv) a non-Lewis acid catalyst, and (v) optionally, a solvent, forming an epoxy resin composition; (II) subjecting the epoxy resin composition produced in step (I) to a separation process to produce at least the following fractions: (A) a fraction of “light” components, if any; (B) a fraction of unreacted aliphatic or cycloaliphatic hydroxyl containing material, if any; (C) a fraction of partially epoxidized aliphatic or cycloaliphatic hydroxyl containing material; (D) a fraction of fully epoxidized aliphatic or cycloaliphatic hydroxyl containing material; and (E) a fraction of an oligomeric polyfunctional aliphatic or cycloaliphatic epoxy resin material; and (III) recycling, optionally with addition of an inert solvent, (a) the isolated partially epoxidized aliphatic or cycloaliphatic hydroxyl containing material, component (C), and/or (b) a mixture of partially epoxidized aliphatic or cycloaliphatic hydroxyl containing material (C) and fully epoxidized aliphatic or cycloaliphatic hydroxyl containing material, component (D) and/or (c) a mixture of unreacted aliphatic or cycloaliphatic hydroxyl containing material, component (B) and component (C) and/or (d) a mixture of components (B), (C) and (D) from step (II) to the reaction mixture of step (I).