Accession Number:

ADA551813

Title:

Evaluation of Low Hazardous Air Pollutant Thermoset Adhesives for the Application of Rubber-to-Metal Bonding on Army Tank Pads and Road Wheels

Descriptive Note:

Final rept. May 2008-Jan 2011

Corporate Author:

ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE

Report Date:

2011-09-01

Pagination or Media Count:

50.0

Abstract:

The Environmental Protection Agency is in the process of mandating Defense Land Systems and Miscellaneous Equipment and National Emission Standards for Hazardous Air Pollutants that will affect Army surface coating operations. Bonding unvulcanized rubber to a metal substrate in the production and replacement of tank treads, track pad, track shoes, and road wheels uses thermoset adhesives and primers with a high hazardous air pollutant HAP content. This research focused on two alternative options to reduce HAP emissions while maintaining performance properties the replacement of HAP-containing thinners used with rubber-to-metal thermoset adhesives or the use of an entirely new low-HAP adhesive system. Thinner miscibility in the baseline adhesives was conducted to identify acetone, methyl ethyl ketone, and naphtholite 663 as compatible non-HAP thinners. Peel adhesion testing was conducted to compare the adhesion strength of each adhesive, both neat and diluted in the test series on each of the rubber compounds used in tank pads, track shoes, and road wheels. The results indicated that a number of the low-HAP adhesives and primer combinations outperformed the baseline HAP-containing materials, including Thixon 532-EF adhesive with naphtholite 663 thinning solvent and Megum 3911 primer. This could result in HAP reductions of 10 tonsyr for the rubber-to-metal bonding operation at Red River Army Depot alone.

Subject Categories:

  • Adhesives, Seals and Binders
  • Combat Vehicles
  • Air Pollution and Control

Distribution Statement:

APPROVED FOR PUBLIC RELEASE