Preparation of a removable polyurethane encapsulant

Technical Report · Sun Aug 01 00:00:00 EDT 1976

DOI:https://doi.org/10.2172/7356917· OSTI ID:7356917

Parker, B. G.

The preparation of polyurethane encapsulants, based on polyether diol/diisocyanate prepolymers and 1,4-butanediol, which are soluble in several organic solvents, was investigated. Since these materials can be easily removed, repair of electronic circuitry found defective in potted units can be readily accomplished. Polyether diols of varying molecular weights were reacted with toluene diisocyanate (TDI) and methylene diphenylisocyanate (MDI) to produce stable prepolymers. Several properties of both the isocyanate prepolymers and 1,4-butanediol cured polyurethane encapsulants are presented.

• Research Organization: Bendix Corp., Kansas City, Mo. (USA)
• DOE Contract Number: E(29-1)-613
• OSTI ID: 7356917
• Report Number(s): BDX-613-1406
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360401* -- Polymers & Plastics-- Preparation & Fabrication-- (-1987)
CHEMICAL PREPARATION
COATINGS
DIELECTRIC MATERIALS
ELECTRONIC EQUIPMENT
ISOCYANATES
MOLECULAR WEIGHT
ORGANIC COMPOUNDS
ORGANIC POLYMERS
ORGANIC SOLVENTS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
POLYAMIDES
POLYETHYLENE GLYCOLS
POLYMERS
POLYURETHANES
SOLUBILITY
SOLVENTS
SYNTHESIS