It all depends on what your project is as to whether you would choose epoxy resin or polyester resin. • The next use of Epoxy is in the production purpose of various electronic things such as insulators, generators, transformers, etc. 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 versus Polyurethane Crack Injection - What is the difference. Resin and epoxy are both adhesives commonly employed in the construction industry. It all depends on what your project is as to whether you would choose epoxy resin or polyester resin. They also harden differently. 3. Polyurethane is generally more resistant to scratching, chemicals, UV rays, and general wear and tear than epoxy. Upon curing, the epoxy build coat(s) provide a hard, durable surface. All rights reserved. Available here As described above, epoxy is lighter, stronger, and more environmentally friendly. Can I use any kind of paint in the mold before casting as long as it is completely dry before the cast? We frequently get asked about the difference between epoxy resin and polyester resin. Polyester resin is most commonly used in the construction of molded reinforced fiber and composite products, so its mechanical properties … They are also not as abrasion and chemical-resistant as polyurethanes. Epoxy is more plastic in texture and forms a hard bond once cured. Sawdust will take up ‘water stains’ when mixed with resin, unless it is sealed first. It’s not as strong as epoxy but there are some occasions when it might do a better job. Epoxy is a blend of hardener and resin made from polyamine and epoxide. If you are repairing an epoxy product, then epoxy should be used for the repair (polyester will perform poorly in this case). Epoxy carries protections for impact, scratches, water, and chemicals. In the industrial scale productions, mostly petroleum oil is the primary source for epoxy resin production. 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. What kind of resin you should select depends on the job you are doing. This chemical protects against damage, UV rays, and water. If the repair is critical or structural, an epoxy resin should be considered. Polyurethane is another resin for floor coating concrete and steel. Chemical-Resistance: Polyurethanes are resistant to a broader range and concentrations of chemicals. We also have crack and spall epoxy-based products that are USDA approved for meat and poultry plant-based applications. Epoxy vs Resin • Epoxy is the name of an ingredient as well as the end product of epoxy resin manufacturing. The blending of the 2 components for each resin type creates a material with the requisite properties for professional crack injection repairs. • Epoxy is resistant to water, heat, and chemicals whereas resins are not. If epoxy is stronger, how is pu more scratch resistant? Which coating would you recommend?”. 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. • Epoxy resin forms stronger bonds when it comes to gluing two pieces together and has better adhesive properties with surfaces like wood, metal or concrete. For concrete floor coating applications, the most durable, longest-lasting coating systems usually include the use of both epoxy and polyurethane. The monomers for epoxy resins are phenols and epichlorohydrin, but the monomers may vary depending on the type of epoxy resin. Polyurethanes "dry" in a fairly short time, but resins "cure" instead of drying and that takes at least 24 hrs. 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. • In some cases, Epoxy is even better than polyurethane. Terms of Use and Privacy Policy: Legal. However, epoxy resins will begin to gel in as quick as 20 minutes, whereas casting resins may take upwards of 18 hours to gel. If the repair is critical or structural, an epoxy resin should be considered. Finishes: Polyurethane finishes can range from satin to semi-gloss to high-gloss. Prior to that, Sean worked in the construction industry, specializing in contract and project management for commercial and industrial floor and roof projects. 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 vs. Polyurethane vs. Resin vs. Urethane Cement Flooring. Epoxy vs polyurethane is a common topic brought up during my conversations. However, using an epoxy-based resin will ensure that the product cures hard and bonds securely to the surface. Of course, concrete preparation is a crucial part of establishing a proper bond. Lazonby, John. Polyurethane will not bond as wide a range of materials as epoxy resin will but in the case of fiber, wood, leather, etc. With 98% solids, polyurea is 4x stronger and yet 98% more flexible than epoxy. When looking for flooring for your business, there are many options out there. A complete coating system is only as good as its initial bond to the concrete substrate. 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. But which material should you choose for your floors? This thin PU is more flexible and abrasion-resistant than epoxy. Resin coatings, such as epoxy or polyurethane, help make flooring materials meet the needs of various industries. Epoxy resins can resist moderate temperatures. The unit for this measurement is “mol/kg”. Most of the times, this polymer material shows high chemical resistance and high-temperature resistance but low flexibility. 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. Figure 02: A Chair made from Polyurethane. There are a number of different epoxy floor coatings on the market today, with costs that are all over the map. 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. Epoxy resins less flexible and less abrasion resistant. Epoxy resins can react with each other via catalytic homopolymerization and form cross-links between them. As a varnish style coating. Dans notre documentaire sur le sol de résine, abordons ici les avantages et inconvénients d’une résine époxy. 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. Chemically, both epoxy and urethane are polymers, or large molecules that contain a repeating structure. Proper Floor Cleaning and Maintenance Can Help Ensure Longer Service Life. What is Epoxy? Polyurethane is also a polymer material that contains urethane linkages. Resin vs Epoxy: below is a list of these main resin categories: Polyester Resin: This is not an actual epoxy but is rather an unsaturated synthetic resin; Epoxy Resin: This type is supplied in 1 or 2 component forms; Polyurethane Resin: This is also not an actual epoxy but is rather a synthetic resin or plastic 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. The downsides of choosing polyurethane are: You need to brush big jobs. Polyester and polyurethane resins are the most commonly used casting material available. De manière générale, ce genre de revêtement de sol est utilisé dans le but de couvrir un entrepôt, ou de grands espaces. • Epoxy resin forms stronger bonds when it comes to gluing two pieces together and has better adhesive properties with surfaces like wood, metal or concrete. 3. Generally, a polyurethane floor coating is highly flexible and elastic, while epoxy flooring is harder and more brittle. Because casting resins are typically capable of thicker pours, they dissipate heat (exotherm) much slower than coating epoxy. I’ve been researching products on your website. There are certainly different types of epoxy coatings formulated to address a different desired performance result. It is formed when isocyanates react with water or polyetheramines to create a urea linkage. Epoxy resins are also sensitive to moisture, but the damage done by humidity will be far more limited. Epoxy is a strong adhesive or glue that does essentially not expand. 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. “Polyurethanes.” The Essential Chemical Industry Online. Résine époxy VS Polyuréthane : avantages et inconvénients. 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. 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 resin dries, or cures, to a very hard, unexpansive surface and is only suitable for indoor use. Build/Thickness: Epoxy build coats are typically installed at 8 to 15 mils per application. Does hardened epoxy still "dent" with enough pressure? Polyurethane is a polymer material that has urethane linkages (carbamate linkages). Urethane is a composition of carbon-based, or organic links that react with a … This polymer material has a low viscosity at room temperature. Reaction of polyepoxides … Polyurethane vs Rubber. Unfortunately, I’m not familiar with wood fillers. 5. In this article we explore the key differences between the two 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. Or else, epoxy resins can react with some other compounds such as; These are co-reactants. In summary – Epoxy vs Polyurethane. Although the name polyurethane gives an idea that the polymer consists of urethane monomers, it in fact, consists of urethane linkages, not monomers. Epoxy and Polyurethane resin floors are the two most common types of floor coatings. What is Polyurethane “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. An old EPS blank can be broken down and recycled into a new blank. There are similarities between these substances, but their differences are more apparent and each industry seems to have its own preference. Epoxy resin countertops are a mixture of resin, silica, a hardener, and filler, which are molded and oven cured as a solid slab. As described above, epoxy is lighter, stronger, and more environmentally friendly. Epoxy and polyurethane are great for protecting your floor against stains, damage, chemicals, oils, and wear. Polyurethane vs Rubber. 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. “It’s bare concrete and we need it to be durable, bright, safe and easy to clean. Polyurethane is a polymer material that has urethane linkages. Odor. As far the features and benefits, it is a durable choice for many kinds of labs. Or call us for help with choosing between epoxy and polyurethane concrete repair products at 631-298-6300. Polyester is far less pleasant to work with than epoxy. Urethane is composed of organic, or carbon-based, links that react with a … 2018. Polyurethanes are the “icing on the cake”. Optional wear and safety additives can be incorporated into the topcoat texture. The crosslinking process forms a thermosetting polymer that has favorable chemical and mechanical properties. Epoxy and polyurethane are booth chemical resins with different reaction profiles and physical properties. chris says: January 10, 2016 at 9:38 pm. 3. Epoxy resin dries, or cures, to a very hard, unexpansive surface and is only suitable for indoor use. From an applicators point of view polyurethane floor resins are extremely sensitive to the presence of humidity. Learn the differences between epoxy vs polyurethane coatings. This polymer material is linear and is semi-solid crystalline materials. What is Epoxy cloth and polyester resin. 4. This creates a well-adhered system base that will allow subsequent build and topcoats. If we increase the amount of bisphenol A (compared to epichlorohydrin), it provides high molecular weight polymer material. The upsides of using polyurethane are: Superb look. While curing epoxy creates a strong bond with the concrete substrate and ultimately provides a repair of high compressive and tensile strength properties. Both epoxy and polyurethane are polymer materials. Cons • There are, some particular usage method of epoxy resin, it can be highly dangerous if not used correctly. 5 days for base and 8-12 hours for overcoats undercuts epoxy cure times but disrupts the use of your space significantly. Polyurethanes can withstand high temperatures. In the industrial floor coating world, while epoxies and polyurethanes are both thermosetting polymers, their differences in function and performance are vast. If an uncured PU floor is attacked by water or condensation you may get this catastrophic results (like in the picture below). We can leave those intracacies for another blog article. Epoxy resins less flexible and less abrasion resistant. To cover wood, a laminate using epoxy resin and 10 oz, cloth will yield a much better job than 10 oz. Epoxy’s quality of being an excellent insulator makes it possible to be used in the electrical industry. Often, I receive a call from a facility manager who has been tasked with coating his or her production floor. 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. @Linda, I would use a very hard curing epoxy or even a polyurethane resin. Side by Side Comparison – Epoxy vs Polyurethane in Tabular Form In this guide, we’ll compare epoxy resin and polyurethane resin: keep reading to learn more. mat and 10 oz. 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. • Damaging or getting a crack on it is almost impossible, this is because of the high durability of epoxy resin. Epoxy resin is made through curing, or using heat, air, or chemicals to harden the substance. 2.’Polyurethane chair, Walker Art Gallery’ By Reptonix free Creative Commons licensed photos (CC BY 3.0) via Commons Wikimedia. The term epoxy is used to name epoxy resins that consist of epoxy functional groups in a repeating pattern. Increased Impact and Abrasion Resistance: Polyurethanes exhibit excellent impact and abrasion resistance, providing up to four times longer life than uncoated epoxy floors. Epoxy resin makes a strong and durable tabletop. 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. There are some differences between polyurethane and epoxy. Bonding to Concrete: Provided the concrete substrate is properly prepared to receive a coating, epoxies are excellent for mechanically bonding to concrete. Video of the Day Volume 0% The ratio between the number of epoxy groups and the mass of the polymer material gives the specific amount of epoxide groups in an epoxy resin. These range from flexible epoxies, to chemical-resistant epoxies, to fast-setting epoxies, etc. Here’s a quick breakdown on the differences between epoxy resin and polyester resin. Novolac epoxy resins for high temperatures. 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. It is formed when isocyanates react with water or polyetheramines to create a urea linkage. 4. These epoxies are designed by having the curing agent with a small amount of epoxy resin. He has over 15 years of marketing and sales support experience in the protective coatings industry. An old EPS blank can be broken down and recycled into a new blank. 1. Epoxy creates a hard protective coating that bonds to concrete or steel. A lighter board is easier to carry, easier to paddle, and will often feel faster when riding them along the face of the wave. They cannot be used as a complete system in itself. The epoxy/cloth laminate is comparable to using polyester resin with 3/4 oz. Reply. 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. December 3, 2019 weezypops Blog. Johnson, Todd. Epoxy or epoxy resin is a class of polymer material consisting of epoxy functional groups. We frequently get asked about the difference between epoxy resin and polyester 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. 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. 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. PU casting resins can, just like epoxy resin and polyester resin, be combined with various additives as well as filling materials or colorants. Of these, aliphatic polyurethane is the preferred option when it comes to garage floor coating applications. Why is Planet Earth Your True Friend for ESD Grounding? Available here, 1.’Epoxy’ By Dzhang2680 – Own work, (CC BY-SA 3.0) via Commons Wikimedia  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. They are also called plastic adhesives, and they are also used to bond together plastics, glass, and metals. Epoxy and Polyurethane coatings exemplify superior long term qualities such as chemical and acid resistance, ease of maintenance, and aesthetic appeal. We will take a look at some of the differentiating factors between the two so you can decide what product suits your floor best. 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. Like epoxy, the 2 components are mixed before they are injected into a foundation crack. Epoxy boards, on the other hand, are much lighter, making them the perfect board for airs or quick turns. These polymers can be either low molecular weight or high molecular weight polymers with at least two epoxide groups. ( CM-15 , PC-155 , PC-275 , PC-650 ) – Polyamide Epoxies: Polyamide Epoxies are one of the older epoxy technologies that are still used today. Moreover, polyol also should have at least two hydroxyl groups per molecule. 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. 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. With a mind rooted firmly to basic principals of chemistry and passion for ever evolving field of industrial chemistry, she is keenly interested to be a true companion for those who seek knowledge in the subject of chemistry. Epoxy is the most popular resin type used in flooring systems. This gives them the desired properties. The key difference between epoxy and polyurethane is that the epoxy contains epoxide groups whereas polyurethanes contain urethane linkages. It takes an age to dry. Polyester resin is excellent for fiberglass lay-up — building a boat, for example. Epoxy is valued for its phenomenal bonding strength and electrical conductivity. Cure time for PU is much longer than PMMA. The difference between epoxy and polyurethane is that the epoxy resin contains epoxide groups whereas polyurethanes contain urethane linkages. Generally, a polyurethane floor coating is highly flexible and elastic, while epoxy flooring is harder and more brittle. 6. Isocyanates and polyols undergo polymerization to form a polyurethane. With the number of advantages polyurethanes have over epoxies, why would one choose one coating technology over the other? 2. 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. 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. With 98% solids, polyurea is 4x stronger and yet 98% more flexible than epoxy. Advantages – The major benefit of epoxy is its strength. This resin has many different uses, besides just as a floor coating. Is Floor Cleaning and Maintenance Part of Your Safety Program? PU/PE are built using a polyurethane foam blank and then glassing it with a polyester resin. Polyurea is a subgroup of polyurethane. Not sure what type of polymer floor coating system your facility requires? Epoxy injection is performed through surface mounted ports. Dear Katherine you seem to know a lot about resins. @media (max-width: 1171px) { .sidead300 { margin-left: -20px; } } From a form and function standpoint, epoxies are very good at three things: On the other side of the coin, epoxies are sensitive to UV light so they will amber or yellow over time when exposed to sunlight. These polymers form via glycosylation of aliphatic alcohols or polyols. Show comparatively low resistance towards organic acids, Shows high resistance towards corrosion, inorganic acids, alkali solvents, organic alkalis and many other solvents. They are both light reflective, easy to clean, and long lasting. Epoxy. Epoxies are fairly easy to install, exhibit ample working time, and are fairly cost-effective when compared to other industrial flooring solutions. It is a form of polyurethane. • Epoxy is stronger than resin. Epoxy resin makes a strong and durable tabletop. These monomers combine with each other to form a polymer. It resembles plastic with more durability. • Epoxy is stronger than resin. 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. Comparison of the characteristics of epoxy and polyurethane Epoxy and polyurethane are referred to as resins; for the most part, both are two component formulations. 2. A polymer is a macromolecule that contains a large number of small repeating units (monomers). Additionally, the offer excellent resistance to staining from hot or cold tires. Madhu is a graduate in Biological Sciences with BSc (Honours) Degree and currently persuing a Masters Degree in Industrial and Environmental Chemistry. Compare the Difference Between Similar Terms. 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. These co-reactants are often referred to as hardeners or curatives, and the cross-linking reaction is commonly referred to as curing. When used as a topcoat over epoxy, they protect the underlying epoxy from yellowing over time. They are both light reflective, easy to clean, and long lasting. Epoxy Technology. A: Acrylic resin (but not acrylic emulsion, which is the basis of acrylic paint) is a thermoplastic, which means it is one of a group of plastics which can be heated and manipulated repeatedly, whereas polyester resin and epoxy are thermosetting plastics, which use heat or a catalyst to solidify into a solid mass that won’t melt down. 2. The epoxy resin is less toxic to the board builder and the environment. Available here  As a result, this can be made very variable to suit any application. Polyurea is a subgroup of polyurethane. Epoxy is an organic compound. Novolac epoxy resins form when phenols react with formaldehyde and undergo glycosylation with epichlorohydrin. These epoxies are designed by having the curing agent with a small amount of epoxy resin. Summary. Polyurethanes "dry" in a fairly short time, but resins "cure" instead of drying and that takes at least 24 hrs. What is Epoxy? “I thought all floor coatings were ‘epoxy’,” the facility manager quips. cloth however the epoxy laminate requires much less labor to fair. Epoxy vs Resin • Epoxy is the name of an ingredient as well as the end product of epoxy resin manufacturing. It can be overwhelming at first. Can I use any kind of paint on the cast piece? 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. 5. 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