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VOC Reduction in Epoxy Protective Coatings Using VOC-Exempt Solvents

VOC Reduction in Epoxy Protective Coatings Using VOC-Exempt Solvents
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Epoxy solvent-borne coatings are well established for protective coatings due to their outstanding adhesion and corrosion resistance. Since the passage of the Clean Air Act in 1990, coating formulators have developed alternatives to the traditional volatile organic compounds (VOCs) and hazard air pollutants (HAPs) historically used in solvent-borne protective coatings. The two main approaches employed have been high solids coatings and replacement of solvents with water. 

Product Number: 51217-069-SG
Author: Eric Ripplinger, Yong Zhang, John Newton
Publication Date: 2017
Industry: Coatings
$0.00
$20.00
$20.00

Epoxy solvent-borne coatings are well established for protective coatings due to their outstanding adhesion and corrosion resistance. Since the passage of the Clean Air Act in 1990, coating formulators have developed alternatives to the traditional volatile organic compounds (VOCs) and hazard air pollutants (HAPs) historically used in solvent-borne protective coatings. The two main approaches employed have been high solids coatings and replacement of solvents with water. The high solids approach may include solvents such as xylene, which is a VOC and HAP. This paper describes the use of 100% VOC-exempt solvents as one option to replace xylene in a 1-type epoxy solvent-borne coating. A second option to be discussed is the use of a blend of a VOC-exempt solvent and a non-HAPS solvent to replace xylene. Comparison of the lower VOC, HAPS-free systems versus the traditional solvent-borne systems in a clear coating formulation will be discussed. The new VOC-exempt solvent containing systems provide additional options for formulators providing lower VOCs and HAPs-free solutions for protective coating applications.

Epoxy solvent-borne coatings are well established for protective coatings due to their outstanding adhesion and corrosion resistance. Since the passage of the Clean Air Act in 1990, coating formulators have developed alternatives to the traditional volatile organic compounds (VOCs) and hazard air pollutants (HAPs) historically used in solvent-borne protective coatings. The two main approaches employed have been high solids coatings and replacement of solvents with water. The high solids approach may include solvents such as xylene, which is a VOC and HAP. This paper describes the use of 100% VOC-exempt solvents as one option to replace xylene in a 1-type epoxy solvent-borne coating. A second option to be discussed is the use of a blend of a VOC-exempt solvent and a non-HAPS solvent to replace xylene. Comparison of the lower VOC, HAPS-free systems versus the traditional solvent-borne systems in a clear coating formulation will be discussed. The new VOC-exempt solvent containing systems provide additional options for formulators providing lower VOCs and HAPs-free solutions for protective coating applications.

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