Self-emulsifying epoxy curing agent

Details Self-emulsifying epoxy curing agent Self-emulsifying epoxy curing agent

1995-06-05

1997-02-04

Marquis, Melvyn I.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

528111, C08K 320, C08L 6302, C08L 6304

Patent

active

055998550

ABSTRACT:
A new epoxy hardener composition is the product of the reaction of (A) a poly(alkylene oxide) monoamine or diamine with a molecular weight (Mn) of about 500 to 6000 and (B) a di- or polyepoxide, in a ratio of epoxide to active amine hydrogens of about 1.1:1 to 6:1 to yield an intermediate (C), which in a second step is reacted with (D) a di- or polyamine, in a ratio of active amine hydrogens to epoxide of greater than about 25 to 1, preferably greater than about 30 to 1. The compositions of the invention are excellent emulsifiers of liquid epoxy resins in aqueous medium without the addition of added surfactants or acidic compounds, and can be used to prepare water resistant water-borne coatings and related products from both liquid and solid epoxy resins, that possess long pot lives and contain relatively small amounts of volatile organic compounds.

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patent: 5032629 (1991-07-01), Hansen et al.
patent: 5246984 (1993-09-01), Darwen et al.
patent: 5280091 (1994-01-01), Dubowik et al.

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