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Title: Development of a removable conformal coating through the synthetic incorporation of Diels-Adler thermally reversible adducts into an epoxy resin.

An epoxy-based conformal coating with a very low modulus has been developed for the environmental protection of electronic devices and for stress relief of those devices. The coating was designed to be removable by incorporating thermally-reversible Diels-Alder (D-A) adducts into the epoxy resin utilized in the formulation. The removability of the coating allows us to recover expensive components during development, to rebuild during production, to upgrade the components during their lifetime, to perform surveillance after deployment, and it aids in dismantlement of the components after their lifetime. The removability is the unique feature of this coating and was characterized by modulus versus temperature measurements, dissolution experiments, viscosity quench experiments, and FTIR. Both the viscosity quench experiments and the FTIR measurements allowed us to estimate the equilibrium constant of the D-A adducts in a temperature range from room temperature to 90 C.
Authors:
; ; ;
Publication Date:
OSTI Identifier:
990046
Report Number(s):
SAND2005-0277C
TRN: US201020%%40
DOE Contract Number:
AC04-94AL85000
Resource Type:
Conference
Resource Relation:
Conference: Proposed for presentation at the Smart Coatings Symposium held February 16-18, 2005 in Disney World, FL.
Research Org:
Sandia National Laboratories
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 42 ENGINEERING; ADDUCTS; COATINGS; FABRICATION; EPOXIDES; DISSOLUTION; RESINS; ELECTRONIC EQUIPMENT; DIELS-ALDER REACTION; REMOVAL