Process for coating a substrate for isolation from hostile envir

Details Process for coating a substrate for isolation from hostile envir Process for coating a substrate for isolation from hostile envir

1988-12-19

1991-03-19

Lawrence, Evan

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

427 28, B05D 106, B05D 124

Patent

active

050009796

ABSTRACT:
A process for coating a substrate such as steel, that will hold an electrostatic charge, wherein a first coating of a thermosetting resin an amine cured opoxy resin of the family diglycidylether of bisphenol-A, is applied to the substrate electrostatically or by fluidized bed methods, a second layer of thermoplastic material is applied electrostatically to the coating of thermosetting material, the substrate is heated and the coatings are cured and bonded to the substrate and to each other at a temperature of from 355.degree. F. to 430.degree. F. for a period of about 6 to about 22 minutes, whereby the first and second coating materials become cross-linked and develop a high degree of impermeability.
Coated substrates made according to the process can be used in the fabrication of items that must withstand ultraviolet or nuclear radiation plus chemical and corrosive attack including containers for toxic and hazardous materials, as well as low level radioactive materials.

REFERENCES:
patent: 3090696 (1963-05-01), Gemmer
patent: 3140195 (1964-07-01), Nagel
patent: 3513012 (1970-05-01), Point
patent: 3770482 (1973-11-01), Millar et al.
patent: 4179542 (1979-12-01), Christotas et al.
patent: 4481239 (1984-11-01), Eckner
patent: 4689241 (1987-08-01), Richart et al.

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