Method of neutralizing the corrosive surface of amine-cured epox

Details Method of neutralizing the corrosive surface of amine-cured epox Method of neutralizing the corrosive surface of amine-cured epox

1981-08-14

1982-12-07

Page, Thurman K.

Coating processes

With pretreatment of the base

Organic base

427340, 427352, 427400, 4274071, B05D 300

Patent

active

043627692

ABSTRACT:
The corrosive alkaline surface layer of an epoxy resin product formed by the curing of the epoxy with an aliphatic amine is eliminated by first applying a non-solvent to remove most or all of the free unreacted amine and then applying a layer of a chemical reagent to neutralize the unused amine or amine functional groups by forming a substituted urea. The surface then may be rinsed with acetone and then with alcohol. The non-solvent may be an alcohol. The neutralizing chemical reagent is a mono-isocyanate or a mono-isothiocyanate. Preferred is an aromatic mono-isocyanate such as phenyl isocyanate, nitrophenyl isocyanate and naplthyl isocyanate.

REFERENCES:
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patent: 3407175 (1968-10-01), Presley et al.
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patent: 3558422 (1971-01-01), Hamilton et al.
patent: 3715326 (1973-02-01), Traubel et al.
patent: 4009113 (1977-02-01), Green et al.
patent: 4085161 (1978-04-01), Sekmakas et al.
patent: 4260727 (1981-04-01), Floyd

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