Accession Number:

ADA076433

Title:

High Solids Coating System

Descriptive Note:

Final rept. 15 Aug 1977-15 Jan 1979

Corporate Author:

DE SOTO INC DES PLAINES IL

Personal Author(s):

• McKay, Gretchen

Report Date:

1979-04-01

Pagination or Media Count:

95.0

Abstract:

The goal of this program is the development of a 65 volume solids, sprayable airless electrostatic method, polyurethane exterior aircraft coating meeting MIL-C-83286 performance specifications. A high solids coating can significantly reduce solvent emissions and help the Air Force meet EPAOSHA requirements for reduced environmental pollution and increased worked safety. One formulation consisting of a combination of Acryloid AU-568 oxazolidine, NIAX PCP-0300 polyol, and Desmodur N-100 polyisocyanate exhibited performance properties close to MIL-C-83286. Additional effort is required to simultaneously maximize coating flexibility and solvent aircraft fluid resistance. The pot life of the mixed two-package system and the final spray viscosity also must be improved. Potential polyol and polyisocyanate candidates can be successfully screened using concentration-viscosity diagrams. The effects of solvent on solution rheology were greater than expected.

Descriptors:

• *SOLIDS
• *COATINGS
• *SPRAYERS
• EMISSION
• ENVIRONMENTS
• RHEOLOGY
• SOLVENTS
• FLUIDS
• VISCOSITY
• TITANIUM DIOXIDE
• POLLUTION
• ELECTROSTATICS
• SHELF LIFE
• POTTING COMPOUNDS

Subject Categories:

• Inorganic Chemistry
• Organic Chemistry
• Coatings, Colorants and Finishes
• Manufacturing and Industrial Engineering and Control of Production Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE