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Performance Comparison of Waterborne and Solvent-Borne Epoxy Primers

Coatings designed for heavy duty applications in the maintenance and protective coatings market are exposed to aggressive environments such as aggressive chemical solvents, marine atmospheres, UV light, abrasion, among others. In the US as well as other areas of the world, coatings designed for these applications have been primarily solvent-borne. 

Product Number: 41212-688-SG
Author: Tim Miller, Yong Zhang
Publication Date: 2012
Industry: Coatings
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$20.00
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Coatings designed for heavy duty applications in the maintenance and protective coatings market are exposed to aggressive environments such as aggressive chemical solvents, marine atmospheres, UV light, abrasion, among others. In the US as well as other areas of the world, coatings designed for these applications have been primarily solvent-borne. There is a strong desire among all the stake holders in the maintenance and protective coatings arena to reduce the emission of volatile organic compounds (VOCs) as well as the human health impact of these coatings. One hundred percent solids coatings are one route to that objective; however, at least in the case of epoxy coatings these have the drawbacks of short pot lives, application difficulty, and reduced corrosion resistance compared to lower solids coatings. The other route has been replacement of organic solvents with water.  A waterborne epoxy and hardener system has been designed in which when properly formulated gives performance rivaling solvent-borne coatings.  Performance of commercial and experimental waterborne 2-K primers will be compared with commercial solvent-borne 2-K primers. The effects on primer performance of curing agents, PVC, and amine-epoxy ratio will also be discussed.

Coatings designed for heavy duty applications in the maintenance and protective coatings market are exposed to aggressive environments such as aggressive chemical solvents, marine atmospheres, UV light, abrasion, among others. In the US as well as other areas of the world, coatings designed for these applications have been primarily solvent-borne. There is a strong desire among all the stake holders in the maintenance and protective coatings arena to reduce the emission of volatile organic compounds (VOCs) as well as the human health impact of these coatings. One hundred percent solids coatings are one route to that objective; however, at least in the case of epoxy coatings these have the drawbacks of short pot lives, application difficulty, and reduced corrosion resistance compared to lower solids coatings. The other route has been replacement of organic solvents with water.  A waterborne epoxy and hardener system has been designed in which when properly formulated gives performance rivaling solvent-borne coatings.  Performance of commercial and experimental waterborne 2-K primers will be compared with commercial solvent-borne 2-K primers. The effects on primer performance of curing agents, PVC, and amine-epoxy ratio will also be discussed.

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