Solar heat reflective coatings

PDF

Authors
  1. Hacker, D.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN);ORTECH Corp, Mississauga ONT (CAN)
Abstract
Marine coatings for the hull and superstructure of naval vessels often exhibit relatively high solar absorption due to the dark colours required for visual camouflage. This results in high surface temperatures which reduce the comfort of the crew, increase cooling requirements and amplify the emission of thermal infrared radiation. Reducing the absorption of solar energy requires pigments which reflect strongly in the near infrared. In this project we identified pigments with enhanced infrared-reflective properties, and reformulated three of the most commonly-used CGSB marine colours to produce coatings with improved infrared reflecting properties. Six variants were prepared for 1-GP-61, 501-109 light grey alkyd enamel. Reflectivity of the experimental formulations at 900 nm ranged from 55% to 81%, compared to 42% for the General Paint standard coating. Two variants were prepared for 1-GP-200, 501-302 dark grey polyurethane anti-skid enamel. Reflectivity of the experimental formulations at 900 nm ranged from 39% to 44%, compared to 8% for the Tibbetts standard. Four variants were prepared for 1-GP-200, 503-305 dark green polyurethane anti-sked enamel. Reflectivity of the experimental formulations at 900 nm ranged from 20% to 50%, compared to 5% for the Tibbetts standard. The experimental coatings meet CSGB requirements for salt spray and accelerated weathering resistance.
Report Number
DREA-CR-1997-409 — Contractor Report
Date of publication
01 Jan 2001
Number of Pages
183
DSTKIM No
CA020181
CANDIS No
516888
Format(s):
Hardcopy;Document Image stored on Optical Disk

Permanent link

Document 1 of 1

Date modified: