Epoxy and Polyurethane resin floors are the two most common types of floor coatings. These co-reactants are often referred to as hardeners or curatives, and the cross-linking reaction is commonly referred to as curing. Epoxy is a strong adhesive or glue that does essentially not expand. Polyurethane may be the most durable resin of them all and that means you won’t need to do as much maintenance when you choose polyurethane. Polyurethane will not bond as wide a range of materials as epoxy resin will but in the case of fiber, wood, leather, etc. Epoxy is a blend of hardener and resin made from polyamine and epoxide. It is formed when isocyanates react with water or polyetheramines to create a urea linkage. Epoxy is an organic compound. Sean enjoys working closely with PIP’s sales and management group to develop and market new flooring products and systems to address end-user’s unique requirements. Résine époxy VS Polyuréthane : avantages et inconvénients. From an applicators point of view polyurethane floor resins are extremely sensitive to the presence of humidity. • Resins are used more in construction where there is no hurry for the final product. The term epoxy is used to name epoxy resins that consist of epoxy functional groups in a repeating pattern. Terms of Use and Privacy Policy: Legal. 4. 7875 Bliss ParkwayNorth Ridgeville, Ohio 44039, info@protectpoly.comWe reply within 24 hours, Sean Walsh is the Marketing & Product Development Manager of Protective Industrial Polymers, a company that manufactures high-performance resinous floor coatings for industrial manufacturing environments, which has a keen focus on developing unique solutions for managing electrostatic, microbial, chemical, explosion and safety risk concerns. Epoxy adheres to wood much better than polyester does. Epoxy is an organic compound. However, using an epoxy-based resin will ensure that the product cures hard and bonds securely to the surface. Epoxies are a type of polyurethanes. Polyurethane coatings perform very similar to Polyaspartics but they take longer time to cure (at least 24 hours) and need to be applied very thin (4 to 6 mils per coat) Polyurethane coatings are used mostly top coats over Epoxy coatings. mat and 10 oz. We frequently get asked about the difference between epoxy resin and polyester resin. Polyurethane coatings perform very similar to Polyaspartics but they take longer time to cure (at least 24 hours) and need to be applied very thin (4 to 6 mils per coat) Polyurethane coatings are used mostly top coats over Epoxy coatings. The epoxy resin is less toxic to the board builder and the environment. Epoxy resins are also sensitive to moisture, but the damage done by humidity will be far more limited. When it comes to epoxy vs polyurethane coatings, the important take-away is to realize that both product technologies work well in conjunction with each other to produce a durable, long-lasting flooring solution. In the application point of view, the main difference between epoxy and polyurethane is that the epoxy resins can resist moderate temperatures while the polyurethanes can withstand high temperatures. “Epoxy.” Wikipedia, Wikimedia Foundation, 19 Apr. He has over 15 years of marketing and sales support experience in the protective coatings industry. This creates a well-adhered system base that will allow subsequent build and topcoats. Most of the times, this polymer material shows high chemical resistance and high-temperature resistance but low flexibility. The epoxy resin is less toxic to the board builder and the environment. • Epoxy is resistant to water, heat, and chemicals whereas resins are not. There are a number of different epoxy floor coatings on the market today, with costs that are all over the map. Polyurethane is a polymer material that has urethane linkages (carbamate linkages). Depending on the desired performance requirements and condition of the concrete, more build coat applications may be desired. If you’re contemplating some major build or repair projects involving fiberglass this summer, then you are probably trying to decide whether it is worth the added expense of using epoxy instead of polyester resin. They cannot be used as a complete system in itself. These monomers combine with each other to form a polymer. Summary. We did find that, on a strength-per-weight basis, epoxy resin and carbon-fiber reinforcement offered the best resistance to penetration—even better that Kevlar. Like epoxy, the 2 components are mixed before they are injected into a foundation crack. it creates a perfectly serviceable bond and one which is likely to be clear in appearance as well as strong. If you are repairing an epoxy product, then epoxy should be used for the repair (polyester will perform poorly in this case). The unit for this measurement is “mol/kg”. Isocyanates and polyols undergo polymerization to form a polyurethane. Polyurethane: Expensive But Durable Finishing Products (300) Polyurethane delivers a tough and flexible coating to wood. 3. Here’s a quick breakdown on the differences between epoxy resin and polyester resin. 1. These polymers can be either low molecular weight or high molecular weight polymers with at least two epoxide groups. An old EPS blank can be broken down and recycled into a new blank. Urethane is a composition of carbon-based, or organic links that react with a … Epoxy and Polyurethane coatings exemplify superior long term qualities such as chemical and acid resistance, ease of maintenance, and aesthetic appeal. In this guide, we’ll compare epoxy resin and polyurethane resin: keep reading to learn more. In summary – Epoxy vs Polyurethane. Compare the Difference Between Similar Terms. The urethane linkage forms when the –N=C=O group of isocyanate react with the –OH groups of alcohol to form a urethane linkage (-NH-C(=O)-O). Polyurethanes can withstand high temperatures. A particular draw of using PU foam is that it is closed cell—meaning it won’t easily soak up resin or water (should you ding your board), which helps keep the board light. Polyurethane vs Rubber. The reactions between the monomers in this polymerization are an exothermic reaction in which heat is given off from the reaction mixture. Even if some of the other more expensive materials can be compared with resin in terms of longevity and quality, the cost-effectiveness, as well as its water-permeable nature, simply makes resin the more practical choice. For example, parts made for bumpers, spoilers, and fenders. Cons • There are, some particular usage method of epoxy resin, it can be highly dangerous if not used correctly. Polyester resin is most commonly used in the construction of molded reinforced fiber and composite products, so its mechanical properties … Polyurethanes are the “icing on the cake”. Though they exhibit much thinner cured-film thickness, polyurethanes offer a number of unique advantages over epoxies. Polyurethane vs Rubber. Protective Industrial Polymers is a unique company devoted to providing turn-key flooring solutions for today's industrial marketplace. Johnson, Todd. It’s not as strong as epoxy but there are some occasions when it might do a better job. Is Floor Cleaning and Maintenance Part of Your Safety Program? Polyurethane is a polymer material that has urethane linkages. In general, epoxy resins offer limited resistance to the organic acids that are found in large quantity of food and drink produce, whereas polyurethane systems boast unrivalled resistance to corrosion, inorganic, alkalis, organic alkalis and solvents. These epoxies are designed by having the curing agent with a small amount of epoxy resin. Poly Surboard. Like epoxy, polyurethane also comes in different formulations. Overall, epoxies are the preferred materials for priming properly prepared concrete substrates, and providing ‘build’ or film thickness that can hide small blemishes or hairline cracks on the concrete surface. A complete coating system is only as good as its initial bond to the concrete substrate. This polymer material has a low viscosity at room temperature. Of these, aliphatic polyurethane is the preferred option when it comes to garage floor coating applications. The latter has very good abrasion resistance, but it did not resist point loading as well as the carbon fiber/epoxy laminates. It's said that one pouring of epoxy resin is "equal to 60 coats of polyurethane" in thickness, but it isn't necessary to use a resin just to get a high gloss effect. • Epoxy is stronger than resin. Proper Floor Cleaning and Maintenance Can Help Ensure Longer Service Life. This thickness allows the coating to chemically bond to the epoxy primer, and is thick enough to self-level and fill minor concrete blemishes and hairline cracks. Epoxy resin dries, or cures, to a very hard, unexpansive surface and is only suitable for indoor use. You will notice that adhesives used for the production of cars, snowboards, bicycles, and many such things are epoxy resin or contains Epoxy in it. Polyurethane is another resin for floor coating concrete and steel. It is formed when isocyanates react with water or polyetheramines to create a urea linkage. Bonding to Concrete: Provided the concrete substrate is properly prepared to receive a coating, epoxies are excellent for mechanically bonding to concrete. What is Epoxy? There are certainly different types of epoxy coatings formulated to address a different desired performance result. An epoxy laminate will need less resin and less material, for the same strength and stiffness joint than polyester, so you save in goo and materials, offsetting to a degree the price difference for the resin. Epoxy boards also tend to be a better option for beginners as they are lighter, float better, and are more difficult to ding. As a result, this can be made very variable to suit any application. • In some cases, Epoxy is even better than polyurethane. It takes an age to dry. Polyester laminating resin doesn't fully cure while exposed to air, so when it is used for lay-up, every application joins to the previous one on a molecular level. We recommend concrete preparation by mechanical means, such as diamond grinding or abrasive shot blasting methods. These epoxies are designed by having the curing agent with a small amount of epoxy resin. Epoxies are fairly easy to install, exhibit ample working time, and are fairly cost-effective when compared to other industrial flooring solutions. Polyester and polyurethane resins are the most commonly used casting material available. It all depends on what your project is as to whether you would choose epoxy resin or polyester resin. Epoxy resins may be reacted (cross-linked) either with themselves through catalytic homopolymerisation, or with a wide range of co-reactants including polyfunctional amines, acids (and acid anhydrides), phenols, alcohols and thiols. Polyurea is a subgroup of polyurethane. Chemical-Resistance: Polyurethanes are resistant to a broader range and concentrations of chemicals. • Epoxy is preferred in most industries as it sets much faster than resin. In fact, in many cases, if the epoxy primer and build coats are well-bonded, a simple re-coat of the polyurethane topcoat may be all that is required every few years, depending upon use. Polyurethane tends to be the most difficult resin to work with. Overview and Key Difference With 98% solids, polyurea is 4x stronger and yet 98% more flexible than epoxy. In the industrial scale productions, mostly petroleum oil is the primary source for epoxy resin production. Polyurethanes provide the enhanced performance characteristics that protect the entire system. Dans notre documentaire sur le sol de résine, abordons ici les avantages et inconvénients d’une résine époxy. Polyurethane injections can take anywhere between 15 to 45 minutes to cure, whereas epoxy options need 3 to 4 hours to fully cure at room temperature. Epoxy and polyurethane are great for protecting your floor against stains, damage, chemicals, oils, and wear. In summary – Epoxy vs Polyurethane. Epoxy Vs. Polyurethane: Which is the Best Resin for Your Driveway? Madhu is a graduate in Biological Sciences with BSc (Honours) Degree and currently persuing a Masters Degree in Industrial and Environmental Chemistry. Epoxy creates a hard protective coating that bonds to concrete or steel. They also harden differently. Epoxy and polyurethane are booth chemical resins with different reaction profiles and physical properties. For concrete floor coating applications, the most durable, longest-lasting coating systems usually include the use of both epoxy and polyurethane. The key difference between epoxy and polyurethane is that the epoxy contains epoxide groups whereas polyurethanes contain urethane linkages. cloth however the epoxy laminate requires much less labor to fair. With the number of advantages polyurethanes have over epoxies, why would one choose one coating technology over the other? In this guide, we’ll compare epoxy resin and polyurethane resin: keep reading to learn more. Flexible and elastic properties go to both of these options and each substance is used in the automotive industry, in the manufacture of certain parts. But which material should you choose for your floors? Epoxy resins less flexible and less abrasion resistant. Both epoxy and polyurethane are polymer materials. There are similarities between these substances, but their differences are more apparent and each industry seems to have its own preference. Does hardened epoxy still "dent" with enough pressure? Flexible and elastic properties go to both of these options and each substance is used in the automotive industry, in the manufacture of certain parts. Often, people say “resin” without specifying which resin. Because casting resins are typically capable of thicker pours, they dissipate heat (exotherm) much slower than coating epoxy. Finishes: Polyurethane finishes can range from satin to semi-gloss to high-gloss. 1. Epoxy vs. Polyurethane vs. Resin vs. Urethane Cement Flooring. This makes polyurethane coatings more resistant to scratches and similar damage and is why you’ll often find urethane resin floors in heavy traffic areas – such as multi-storey car parks. Increased Impact and Abrasion Resistance: Polyurethanes exhibit excellent impact and abrasion resistance, providing up to four times longer life than uncoated epoxy floors. Dear Katherine you seem to know a lot about resins. 2.’Polyurethane chair, Walker Art Gallery’ By Reptonix free Creative Commons licensed photos (CC BY 3.0) via Commons Wikimedia. In the industrial floor coating world, while epoxies and polyurethanes are both thermosetting polymers, their differences in function and performance are vast. What is Polyurethane Can I use any kind of paint on the cast piece? When using the monomers for the production of polyurethanes, the isocyanates should have at least two functional groups that allow it to undergo polymerization. The monomers for epoxy resins are phenols and epichlorohydrin, but the monomers may vary depending on the type of epoxy resin. 6. They are both light reflective, easy to clean, and long lasting. Lazonby, John. Reply. Generally, a polyurethane floor coating is highly flexible and elastic, while epoxy flooring is harder and more brittle. What are the real differences between polyurethane resin and epoxy? • Damaging or getting a crack on it is almost impossible, this is because of the high durability of epoxy resin. These polymers get their name according to the repeating linkages present in the polymer material instead of the monomers used for the production. As polyurethane is more durable than rubber, it can be used in cases of high stress and offers a certain amount of flexibility but remains strong. Why is Planet Earth Your True Friend for ESD Grounding? Epoxy resin is made through curing, or using heat, air, or chemicals to harden the substance. Polyurethanes "dry" in a fairly short time, but resins "cure" instead of drying and that takes at least 24 hrs. cloth and polyester resin. Epoxy Technology. Reaction of polyepoxides … Like epoxy, it is a 2-part component that mixes resin with a catalyst to cause the curing reaction that makes the material hard. Polyurethane is generally more resistant to scratching, chemicals, UV rays, and general wear and tear than epoxy. A lighter board is easier to carry, easier to paddle, and will often feel faster when riding them along the face of the wave. A polymer is a macromolecule that contains a large number of small repeating units (monomers). 2. Often, people say “resin” without specifying which resin. Can I use any kind of paint in the mold before casting as long as it is completely dry before the cast? This polymer material is linear and is semi-solid crystalline materials. What kind of resin you should select depends on the job you are doing. Epoxy resin makes a strong and durable tabletop. Epoxy injection is performed through surface mounted ports. Side by Side Comparison – Epoxy vs Polyurethane in Tabular Form As described above, epoxy is lighter, stronger, and more environmentally friendly. The crosslinking process forms a thermosetting polymer that has favorable chemical and mechanical properties. These two components are thoroughly mixed together, applied to the concrete floor, and allowed to cure. 2018. PU casting resins can, just like epoxy resin and polyester resin, be combined with various additives as well as filling materials or colorants. The blending of the 2 components for each resin type creates a material with the requisite properties for professional crack injection repairs. Sawdust will take up ‘water stains’ when mixed with resin, unless it is sealed first. @media (max-width: 1171px) { .sidead300 { margin-left: -20px; } } chris says: January 10, 2016 at 9:38 pm. Or call us for help with choosing between epoxy and polyurethane concrete repair products at 631-298-6300. • Resins are used more in construction where there is no hurry for the final product. De manière générale, ce genre de revêtement de sol est utilisé dans le but de couvrir un entrepôt, ou de grands espaces. However, there are some plant-derived sources as well. 5. They are also called plastic adhesives, and they are also used to bond together plastics, glass, and metals. • The next use of Epoxy is in the production purpose of various electronic things such as insulators, generators, transformers, etc. (adsbygoogle = window.adsbygoogle || []).push({}); Copyright © 2010-2018 Difference Between. With 98% solids, polyurea is 4x stronger and yet 98% more flexible than epoxy. Epoxy vs Resin • Epoxy is the name of an ingredient as well as the end product of epoxy resin manufacturing. Therefore, the cross-linking reactions that epoxy resins undergo with these curatives refers to “curing”. Like epoxy, it is a 2-part component that mixes resin with a catalyst to cause the curing reaction that makes the material hard. Epoxy carries protections for impact, scratches, water, and chemicals. Polyester resin is excellent for fiberglass lay-up — building a boat, for example. Epoxy resin makes a strong and durable tabletop. Additionally, the offer excellent resistance to staining from hot or cold tires. EPS foam is also more environmentally friendly than polyurethane because it can be recycled and re-purposed. If the repair is critical or structural, an epoxy resin should be considered. When looking for flooring for your business, there are many options out there. Epoxy resin dries, or cures, to a very hard, unexpansive surface and is only suitable for indoor use. As a varnish style coating. This resin has many different uses, besides just as a floor coating. The downsides of choosing polyurethane are: You need to brush big jobs. Polyurethane is also a polymer material that contains urethane linkages. The conversation usually starts off something like this: “I need you to take a look at my concrete floor,” the facility manager says. Advantages – The major benefit of epoxy is its strength. I’ve been researching products on your website. Polyurethane resin, on the other hand, is up to 50 times more expansive than epoxy resin, making it far more resistant to cracking and therefore suitable for indoor or outdoor use. Polyurethane coatings are only about 2 or 3 mils thick and just about 60% or 70% solids, depending on the manufacturing company you get the coating from. Optional wear and safety additives can be incorporated into the topcoat texture. They also harden differently. As polyurethane is more durable than rubber, it can be used in cases of high stress and offers a certain amount of flexibility but remains strong. One of our all-time most popular posts on Allthingsflooring.com is “Epoxy vs Polyurethane – which will you choose”.As this has proved to be such an in-demand topic, we thought we’d follow up with a post that looks into these two resin chemistries in a bit more depth. Learn the differences between epoxy vs polyurethane coatings. As far the features and benefits, it is a durable choice for many kinds of labs. It all depends on what your project is as to whether you would choose epoxy resin or polyester resin. You can follow Sean on, Our Industrial Flooring Self Assessment will change the way you think about flooring needs, Assembling a Quality Industrial Flooring System from the Ground Up. Available here  Prior to that, Sean worked in the construction industry, specializing in contract and project management for commercial and industrial floor and roof projects. Unfortunately, I’m not familiar with wood fillers. Epoxy resin counter tops are made from a mixture of materials then cured as a solid continuous product. Polyurethane (or urethane), used for foundation crack repair applications, while not necessarily a 2 component blend, can have 2 components; the polyurethane resin and an activator, or accelerator. In very simple terms, a typical two-part epoxy coating contains a resin side and a hardener side. 5 days for base and 8-12 hours for overcoats undercuts epoxy cure times but disrupts the use of your space significantly. “I thought all floor coatings were ‘epoxy’,” the facility manager quips. The monomers for polyurethane are polyols and isocyanates. As described above, epoxy is lighter, stronger, and more environmentally friendly. Epoxy Benefits Epoxies come in a variet Polyurethane resin, on the other hand, is up to 50 times more expansive than epoxy resin, making it far more resistant to cracking and therefore suitable for indoor or outdoor use. Epoxy resins can resist moderate temperatures. Generally, a polyurethane floor coating is highly flexible and elastic, while epoxy flooring is harder and more brittle. The difference between epoxy and polyurethane is that the epoxy resin contains epoxide groups whereas polyurethanes contain urethane linkages. Urethane is composed of organic, or carbon-based, links that react with a … December 3, 2019 weezypops Blog. UV Stability: Polyurethanes exhibit excellent UV-resistance. Epoxy versus Polyurethane Crack Injection - What is the difference. With so many options available, it's difficult to decide what's best for your facility. Epoxy. This chemical protects against damage, UV rays, and water. ( CM-15 , PC-155 , PC-275 , PC-650 ) – Polyamide Epoxies: Polyamide Epoxies are one of the older epoxy technologies that are still used today. “It’s bare concrete and we need it to be durable, bright, safe and easy to clean. Build/Thickness: Epoxy build coats are typically installed at 8 to 15 mils per application. Odor. This thin PU is more flexible and abrasion-resistant than epoxy. Figure 02: A Chair made from Polyurethane. Epoxy’s quality of being an excellent insulator makes it possible to be used in the electrical industry. 3. The epoxy/cloth laminate is comparable to using polyester resin with 3/4 oz. “What Are Epoxy Resins?” ThoughtCo, ThoughtCo. Novolac epoxy resins form when phenols react with formaldehyde and undergo glycosylation with epichlorohydrin. Epoxy resin countertops are a mixture of resin, silica, a hardener, and filler, which are molded and oven cured as a solid slab. Epoxy vs polyurethane is a common topic brought up during my conversations. A layer of resin is applied to the floor and then cured – the process whereby the resin hardens. Epoxy resins less flexible and less abrasion resistant. If an uncured PU floor is attacked by water or condensation you may get this catastrophic results (like in the picture below). If the repair is critical or structural, an epoxy resin should be considered. For example, the user can add an inhibitor to the resin to increase the so-called pot life, i.e., the processing time. What is Epoxy Novolac epoxy resins for high temperatures. These range from flexible epoxies, to chemical-resistant epoxies, to fast-setting epoxies, etc. “For a general industrial or commercial application, the vast majority of the time I would recommend, at minimum, a three coat system consisting of an epoxy primer, an epoxy build-coat and a polyurethane topcoat,” I respond. While curing epoxy creates a strong bond with the concrete substrate and ultimately provides a repair of high compressive and tensile strength properties. 2. Polyester is far less pleasant to work with than epoxy. Chemically, both epoxy and urethane are polymers, or large molecules that contain a repeating structure. Novolac is another class of epoxy resin that has higher functionality than standard DGEBA resulting in a higher crosslink density. Moreover, polyol also should have at least two hydroxyl groups per molecule. Aside from the elastic durability factor which makes polyurethane the number one choice by default, the resin is also more scratch-resistant, crack-resistant, temperature resistant and chemical resistant than epoxy. This gives them the desired properties. Epoxy boards, on the other hand, are much lighter, making them the perfect board for airs or quick turns. Of course, concrete preparation is a crucial part of establishing a proper bond. Not sure what type of polymer floor coating system your facility requires? Or else, epoxy resins can react with some other compounds such as; These are co-reactants. It’s not a matter of choosing one over the other, but a matter of utilizing both to achieve the desired result: Epoxy primers for bonding the system to concrete, epoxy build coat(s) for total system build/thickness, and polyurethane topcoats for enhanced physical performance, chemical-resistance, safety and aesthetics. “What’s the difference with epoxy vs polyurethane coatings?”. Epoxy is the most popular resin type used in flooring systems. Here we use bisphenol F in the place of bisphenol A, but the way of formation of the polymer is same as the bisphenol A epoxy resin (as discussed above). There are some differences between polyurethane and epoxy. This makes polyurethane coatings more resistant to scratches and similar damage and is why you’ll often find urethane resin floors in heavy traffic areas – such as multi-storey car parks. They cannot be used as a complete system in itself. We will take a look at some of the differentiating factors between the two so you can decide what product suits your floor best. Polyurea is a subgroup of polyurethane. It resembles plastic with more durability. Some other names for these co-reactants are hardeners or curatives. Installation & Performance: Upon curing, the epoxy build coat(s) provide a hard, durable surface with good impact resistance. When used as a topcoat over epoxy, they protect the underlying epoxy from yellowing over time. @Linda, I would use a very hard curing epoxy or even a polyurethane resin. In the application point of view, the main difference between epoxy and polyurethane is that the epoxy resins can resist moderate temperatures while the polyurethanes can withstand high temperatures. Quick comparison between Epoxy Resins and Polyurethane Resins formulated for Concrete Crack Injection ... Epoxy resin needs to be contained in a crack until cured sufficiently to achieve full strength. In this article we explore the key differences between the two The key difference between epoxy and polyurethane is that the epoxy contains epoxide groups whereas polyurethanes contain urethane linkages. The method of calculation of the specific amount of epoxy groups present in the epoxy resin is as follows: This type of epoxy resins is a result of the combination of epichlorohydrin and bisphenol A. this combination gives bisphenol A diglycidyl ethers. 5. If we increase the amount of bisphenol A (compared to epichlorohydrin), it provides high molecular weight polymer material. Cure time for PU is much longer than PMMA. Resin and epoxy are both adhesives commonly employed in the construction industry. We call this term sometimes as “epoxide number”. When choosing a resin to coat a concrete floor, companies want to make the best choice, which is usually reduced to either epoxy vs polyurethane. The upsides of using polyurethane are: Superb look. Upon curing, the epoxy build coat(s) provide a hard, durable surface. 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Devoted to providing turn-key flooring solutions for today 's industrial marketplace more flexible epoxy! Is only suitable for indoor use a lot about resins of polymer material that has linkages... Increase the so-called pot life and risk of humidity water stains ’ when mixed with resin, it formed. Installation & performance: upon curing, the offer excellent resistance to staining hot!