Accession Number:

ADA279762

Title:

Evaluation of Innovative Painting Processes

Descriptive Note:

Final technical rept. Oct 1990-Oct 1991

Corporate Author:

PANDALAI COATINGS CO BRACKENRIDGE PA

Personal Author(s):

Report Date:

1993-04-01

Pagination or Media Count:

45.0

Abstract:

This report details an evaluation of two novel spray painting techniques that may decrease volatile organic compound VOC emissions associated with application of surface coatings. one technique uses supercritical carbon dioxide as a solvent and a propellant to deliver and disperse the coating. The second system, called the Ultra-Low Volume ULV process utilizes pressurized nitrogen to deliver a constant-flow, very soft spray through the gun nozzle. The CO2 system encountered problems in delivering urethane topcoats and was eliminated from field testing. Data were gathered on VOC emissions, paint consumption, coat thickness, and workplace exposure during application of an epoxy primer and a silica-filled chemical resistant CARC topcoat to a fleet of trucks at Warner Robins AFB GA. The ULV process was compared to a conventional air atomizing gun system. Results revealed a 50- percent decrease in VOC emissions, and a 30-percent decrease in paint consumption at no increase in exposure when using the ULV system. Spray painting, Transfer efficiency, Constant-pressure airless spray gun, Air pollution, VOCs, Pollution prevention.

Subject Categories:

  • Coatings, Colorants and Finishes
  • Air Pollution and Control

Distribution Statement:

APPROVED FOR PUBLIC RELEASE