US 2004/0176502 A1 · Mannich based adducts as water based epoxy curing agents with fast cure capabilities for green concrete application

Abstract

A water-soluble composition including a water soluble polyamine adduct which is a reaction product of: (a) an alkoxy group modified polyepoxide resin containing an average of at least 1.5 epoxide groups per molecule; and (b) a Mannich base polyamine. The Mannich base polyamine is a reaction product of a polyamine containing at least two amino groups with a N-Mannich condensate prepared from a reaction of a phenolic compound, an aldehyde, and a secondary amine wherein the secondary amine of the N-Mannich condensate is replaced by one of the at least two amino groups of the polyamine, and wherein the ratio of the Mannich base polyamine to the alkoxy group modified polyepoxide resin contains an excess of an active amine hydrogen relative to epoxide groups so that the water soluble polyamine adduct has an amine hydrogen equivalent weight of at most 1000 based on solids content.

Claims48

Dependent claims

A water-soluble composition comprising a water soluble polyamine adduct which is a reaction product of:

(a) an alkoxy group modified polyepoxide resin containing an average of at least 1.5 epoxide groups per molecule;
and
(b) a Mannich base polyamine, wherein the Mannich base polyamine is a reaction product of a polyamine containing at least two amino groups with a N-Mannich condensate prepared from a reaction of a phenolic compound, an aldehyde, and a secondary amine;
and provided that the secondary amine of the N-Mannich condensate is replaced by one of the at least two amino groups of the polyamine, the polyamine boils at a higher temperature than the secondary amine, and at least one of the at least two amino groups of the polyamine is a primary or a secondary amino group;
and
wherein the ratio of the Mannich base polyamine to the alkoxy group modified polyepoxide resin contains an excess of an active amine hydrogen relative to epoxide groups so that the water soluble polyamine adduct has an amine hydrogen equivalent weight (AHEW) of at most 1000 based on solids content.

3 more elements

A primer for concrete comprising a product of reaction of a polyepoxide resin containing an average of at least 1.5 epoxide groups per molecule and a water-soluble composition, wherein the water-soluble composition is formed by:

(a) reacting a phenolic compound, an aldehyde and secondary amine to form a N-Mannich condensate;
(b) forming a Mannich base polyamine, wherein the Mannich base polyamine is a reaction product of a polyamine containing at least two amino groups with a N-Mannich condensate prepared from a reaction of a phenolic compound, an aldehyde, and a secondary amine;
and provided that the secondary amine of the N-Mannich condensate is replaced by one of the at least two amino groups of the polyamine, the polyamine boils at a higher temperature than the secondary amine, and at least one of the at least two amino groups of the polyamine is a primary or a secondary amino group;
and
(c) reacting the Mannich base polyamine with an alkoxy group modified polyepoxide resin containing an average of at least 1.5 epoxide groups per molecule to form the polyamine adduct, wherein the primer is adapted to be applied on concrete that has set.

2 more elements

Dependencies are inferred from the claim text.

Mannich based adducts as water based epoxy curing agents with fast cure capabilities for green concrete application

Life of this patent

Mannich based adducts as water based epoxy curing agents with fast cure capabilities for green concrete application

Life of this patent

Abstract

Claims48