EPOXY RESIN SYSTEM FORMULATION CHEMISTRY

 

 

Thixotrophic Materials

Understanding The Difference Between Floor Paints, Wall Paints, and Basic Marine Type Resins/Epoxies

 

What is the difference between floor paint (or floor epoxy paint) and wall paint (wall/regular epoxy paint)? Can I paint my boat/grill, etc. with the Marine Epoxy I used to build my canoe?

 

 

Thixotrophic Epoxy resin - paints Explained
The Difference Between Epoxy Floor Paints, Wall Paints, and Basic Marine Resins Epoxies

 


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Paul Oman, MS, MBA - Progressive Epoxy Polymers, Inc.(floor epoxies, marine epoxies, underwater epoxies, repair epoxies)

Member: NACE (National Assoc. of Corrosion Engineers), SSPC (Soc. of Protective Coatings)

"Professionals helping Professionals since 1994"


PROGRESSIVE EPOXY POLYMERS, INC.


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We've been selling epoxy - marine epoxy (boat building - wood / fiberglass repair) industrial coatings - garage paint -

underwater epoxies - thick putties - tabletop resins and supplies since the early 1990's


 

thixotrophic epoxy paint and resin



The key to understanding the answers to these questions is called THIXOTROPHY. Wall paints and epoxy paints have THIXOTROPHIC additives in them. Floor paints, marine epoxies, water, etc. do not.


Basically Thixotrophic additives are gelling agents. They give the product a 'gel' type status when not disturbed. The gel property goes away when the product is moved. For a paint, be it an enamel or an epoxy, the thixotrophic agent gels the product once the brushing or rolling of the product is complete. This 'gelling' affect means that the paint applied to the top of the wall will be as thick as the paint applied to the bottom of the wall. Water is not thixotrophic, that's why when you wet down a wall with water and come back a little while later, the bottom of the wall is wet and the top of the wall is dry. The water continued to flow down the wall, collecting at the bottom of the wall. It did not 'gel' or set after it was applied, thus letting gravity pull the water down.


We want to paint our walls with a thixotrophic coating so that we'll have the same thickness of paint at the top as on the bottom of the wall. However, we don't want our floor paint to be thixotrophic. The more it continues to flow after application the more it will self level and even itself out. Using a thixotrophic paint on the floor might leave brush or roller marks and it might not level out smoothly or quickly. Thixotrophic additives are the big difference between epoxy paints and epoxy floor paints.


Marine epoxies are like epoxy floor paints. They do not contain any thixotrophic additives.

 


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EPOXY RESIN SYSTEM FORMULATION CHEMISTRY

Thixotrophic Epoxy resin - paints Explained
The Difference Between Epoxy Floor Paints, Wall Paints, and Basic Marine Resins Epoxies



Converting your marine epoxy/epoxy resin or floor paint/epoxy to a thixotrophic coating/paint can be done by adding a thixotrophic agent. Fumed Silica, (also known by the brand names Cabosil® and Aerosil® - we sell Aerosil R202 by the quart. For more info on Fumed Silica -
click here) is a very common epoxy thickener (add about 2 parts fumed silica to 1 part epoxy and you get a putty like epoxy), but it is also a common thixotrophic additive (unless you add so much that you create epoxy putty!). Probably adding something like 1 part fumed silica to 1 or 2 parts epoxy is about right. As you are mixing it into the epoxy (a real pain - fumed silica is extremely light and floats in the air, getting on your clothes, etc. It doesn't like being mixed into the thick, gummy epoxy, but everyone does it anyway!) nothing much seems to happen. The epoxy will not appear to be getting thicker (the 'gel' affect happens when the product is sitting still). But it is doing its job as a THIXOTROPHIC AGENT. See Aerosil R 202 Fumed Silica in our marine catalog - click here.

Our Water Gard 300 / NSP 120 epoxy paint is a classic example of a thixotrophic epoxy. The part A is so thixotrophic you can scoop it out and almost cut it with a knife, but as you work with it, it becomes liquid and creamy. We had one customer insisting there was something wrong with the product and that the Part A had 'gelled up'. It wasn't of course, it was just very thixotrophic plus solvent free epoxies are thick to start with.


Third party explanation of THIXOTROPHY -
click here

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Epoxy "Stab Brush" --  "Regular Brush"

Use with products on this page

buy separately or include with your order

epoxy paint brush

STAB BRUSH - 3 inch wide with 3/4 inch bristles. Most epoxies are too thick for a regular brush. Stab brushes allow you to push and move the epoxy around and 'stab' or poke it into cracks, voids, and corners

REGULAR BRUSH - 2 inch wide and extra thick with synthetic bristles. Use with varnish, paints and thin epoxies. Priced for disposable use.

Find Stab Brushes and Regular Brushes in our MARINE CATALOG or in our HOME/COMMERCIAL CATALOG

Goto our 3rd party storefront and purchase in the MISC SECTION

 


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Thixotrophic Epoxy resin - paints Explained
The Difference Between Epoxy Floor Paints, Wall Paints, and Basic Marine Resins Epoxies
 

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