Epoxy curing agents, compositions and uses thereof
AssigneeEvonik Degussa GmbH
InventorsShiying Zheng, Sudhir Ananthachar, Robert Rasing, Nergiz Bozok, Shafiq Fazel, Michael Oberlander
Life of this patent
Estimating the term…
Abstract
The present invention relates to epoxy curing agents which are obtained from the reaction of a polyalkylene polyether modified polyepoxide resin and a polyamine component. They polyamine component is a reaction product of a polyethylene polyamine having 3 to 10 nitrogen atoms, for example, diethylenetriamine (DETA), and at least one aldehyde having 1 to 8 carbon atoms, for example, formaldehyde. The epoxy curing agent may be used as part of a two component coating system in the curing of liquid or pre-dispersed curable epoxy resins.
Claims26
A composition comprising the reaction product of:
- (a) a polyamine comprising the reaction product of a polyethylene polyamine having 3 to 10 nitrogen atoms and an aldehyde having 1 to 8 carbon atoms;
- and
- (b) a polyalkylene polyether modified polyepoxide resin.
An amine-epoxy composition comprising:
- the reaction product of a curing agent and an epoxy composition, wherein the epoxy composition comprises at least one multifunctional epoxy resin, and wherein the curing agent comprises:
- a reaction product of at least one polyamine and at least one polyalkylene polyether modified polyepoxide resin, wherein the at least one polyamine comprises:
- a reaction product of a polyethylene polyamine having 3 to 10 nitrogen atoms and at least one aldehyde having 1 to 8 carbon atoms.
A process for the preparation of a curing agent for aqueous epoxy resin compositions, comprising:
- (a) reacting a polyethylene polyamine having 3 to 10 nitrogen atoms with at least one aldehyde having 1 to 8 carbon atoms to produce a polyamine component;
- and
- (b) reacting the polyamine component with at least one polyalkylene polyether modified polyepoxide resin to produce a curing agent.
An epoxy modified cement composition comprising:
- (A) an epoxy composition comprising at least one multifunctional epoxy resin having at least two epoxide groups per molecule;
- (B) a curing agent comprising water and the reaction product of:
- (1) a polyalkylene polyether modified polyepoxide resin component, and (2) a polyamine component which is the reaction product of (2a) a polyethylene polyamine having 3 to 10 nitrogen atoms and (2b) a C1 to C8 aldehyde;
- and
- (C) a solid component comprising at least one hydraulic inorganic binder.
Dependencies are inferred from the claim text.