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Comparison of polyurethane and epoxy resin

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Comparison of polyurethane and epoxy resin

Issue Time:2020-02-05
We all know that polyurethane flooring refers to the use of polyurethane floor coatings combined with a new type of solvent-free or water-based, pollution-free floor function construction technology. The new generation of polyurethane flooring is mainly a replacement for epoxy flooring. More abrasion resistance, flexibility and convenient construction.

What is the difference between polyurethane and epoxy?

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As a traditional material, epoxy floor coating has a long application history, wide application area and large market share.

Advantages of epoxy resin
1. High adhesion to the base layer and small shrinkage;
2. Good acid and alkali resistance;
3. High hardness;


Disadvantage
: Poor weather resistance and easy aging, so the service life is shorter than that of polyurethane;
Epoxy resin is a steel material, so its abrasion resistance and low temperature resistance are poor.
In addition, due to its higher filler content, the coating surface is less resistant to scratches.

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Polyurethane floor coatings, as a new type of material, make up for some of the shortcomings of epoxy floor coatings, and are getting more and more applications. Its advantages are:

Advantage
1. Good weather resistance, not easy to aging, the aging resistance life can reach more than 20 years, so the service life is long;
2. High abrasion resistance; (750g / 500rpm <0.016g, epoxy resin is generally: (0.03 ~ 0.04g)
3. Good impact resistance; (216 kg · cm, 25 times without damage, epoxy resin is generally: 50 kg · cm, 1 time without damage)
4. Good low temperature resistance; (at least -60 ℃, epoxy resin is generally -30 ℃)
5. Good oil resistance, better than NBR rubber oil resistance;
6. Good anti-skid performance; (static friction coefficient of both wet and dry surfaces> 0.6, static friction coefficient of wet and dry surfaces of epoxy resin <0.4)
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