Spraying with Plural-Component Equipment:

Seven Methods for Improved Performance and Savings

From JPCL, April 2020

By John Lihwa, Graco Inc.

Plural-component coatings have historically presented challenges for contractors, with significant material, time and labor costs tied to mixing two or more components prior to application. This article describes how switching from hand mixing (or "hot potting") two-component materials to spraying them with plural-component equipment can significantly reduce costs and improve performance for contractors....


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Tagged categories: Coating Application; Paint application; Plural component spray

Comment from Devon McCarthy, (6/22/2020, 10:26 AM)

As a R&D chemist working on 2K coating technologies, I am struggling with finding the proper machine to test out my formulations in a small scale lab setting. I desire a machine that can spray 2K coatings on a scale of 1 or 2 gallons maximum and still maintain the ratio flexibility from 1:1 to 10:1. Is there any machine out there that can do this, and how much of an investment is it?


Comment from Luc N. Turenne, (6/22/2020, 1:15 PM)

Devon, A pneumatic cartridge sprayer is capable of spraying faster setting 2K products. My initial cost estimate is approx $1500. You would have to fill your own cartridges. The sprayer is available with various rebranding names on it. Note this does not work with snap set formulations


Comment from Devon McCarthy, (6/24/2020, 8:44 AM)

Luc, do you happen to know a company/brand name that sells this type of equipment? I would love to get my hands on one.


Comment from Michael Durbin, (6/24/2020, 9:43 AM)

Devon, Sherwin-Williams sells this type of equipment through their Protective and Marine Division


Comment from Edye Fox, (6/24/2020, 11:35 AM)

Hi Devon, The ChemQuest Group's Technology Institute can help you work through application testing during your R&D process. Feel free to reach out.


Comment from John Lihwa, (6/25/2020, 9:37 PM)

Hi Devon, thank you for the question. This is one we get asked a lot as most R&D labs always fight the battle of small batches to prove out chemistries before making larger batches. Most equipment is designed to be used with larger quantities, especially when looking at high pressure plural systems that are electronically controlled. We do have some smaller mechanical proportioners that would work with the quantities you described. I would be happy to discuss your needs further with you. Please feel free to reach out to me; my email address is jlihwa at graco dot com. Thanks!


Comment from Luc N. Turenne, (6/29/2020, 10:33 AM)

Devon, You can look up Sulzer, and they have Mix Paks for various small volume applications of usually less than a litre at a time. You will have to verify that this will work for the products you are using. While good for touch up work , or small components, it is not a substitute for larger or production applications. Feel free to reach out lturenne@wisl.ca


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