The modified polyurethane-polyisocyanurate (PU-PIR) foam has been widely used as an insulation material in construction, transportation and industrial applications, Text is available under the Creative Commons Attribution/Share-Alike License; additional terms may apply. Mineral wool slabs absorbed 8 to 38 times more water than foil-faced polyisocyanurate (PIR) and 4 to 19 times more water than coated glass-faced PIR. Today, nearly 40 percent of our nation’s energy is used to heat, cool and operate our homes and buildings. 3.2 Properties, Uses and Applications Compared to other forms of foam insulation, polyisocyanurate foam insulation The insulating core of a polyurethane panel is rigid polyurethane foam (PUR or PU). Non-asbestos Calcium Silicate insulation board and pipe insulation feature with light weight, low thermal conductivity, high temperature and chemical resistance. Rigid Polyurethane and Polyisocyanurate. The thermal conductivity can be lower than of polyurethane foam. In comparison, a typical 1″ insulated glass unit offers an approximate R-value of 2.4. Foam core density of polyisocyanurate combined with 141b blowing agent equivalent to polyurethane’s density can cause numerous problems such as shrinkage of the core, and poor compressive, tensile and shear values are the result. dans le PIR3. The term “rigid polyurethane foam” comprises two polymer types: Polyisocyanurate formulations, and polyurethane formulas. We recommend end-users view the pdf version of this document under our Technical Bulletins, and indeed puruse other Technical Bulletins from Dyplast that address these differences. It is poured between the two metal supports during production. You may need a PDF reader to view some of the files on this page. Two major raw materials are usedin the production of polyiso insulation: polyisocyanates and polyols. This factor also proves advantageous during the handling and installation of polyiso. Drying within vented benchtop assemblies required 2 to 6 days longer for mineral wool as compared to PIR. Polyisocyanurate Foam Polyisocyanurate foam (PIR), also referred to as PIR, polyiso, or ISO, it is very similar as polyurethane foam. The cyclical ring structure that is unique to polyiso makes it very stable at high temperatures when compared to urethanes. Dyplast’s ISO-CF polyiso is ideal for composite foam core temperatures between -297 and +300°F. This foam, upon contact with the air, solidifies and glues the two plates together, creating a monolithic product with a very high insulating value. The chemistry of ISO-C1 and ISO-HT polyisocyanurate (polyiso or PIR) is basedon a modification of the traditional polyurethane formulations. The chemistry of polyiso isbased on a … Energy efficient buildings, such as those using polyurethane and polyiso foam products, use less energy to heat and cool, requiring less fossil fuel use and emitting fewer greenhouse gas emissions. This absorption is minimized by the chemical structure of Dyplast’s polyiso formulation. The greater bond strength also means these are more difficult to break, and as a result a polyisocyanurate foam is chemically and thermally more stable; breakdown of isocyanurate bonds is reported to start above 200 °C, compared with urethane at 100 to 110 °C.Polyisocyanurate typically has an MDI/polyol ratio, also called its “index”, higher than 180. 6. The chemistry of ISO-CF® and ISO-CF/HT polyisocyanurate, on the other hand, is based on a modification of the traditional polyurethane formulations. One such property is the service temperature. As nouns the difference between foam and polyisocyanurate is that foam is a substance composed of a large collection of bubbles or their solidified remains while polyisocyanurate is (organic chemistry) a form of polyurethane polymer, based on cyanuric acid, formed from a polyhydroxy alcohol and a diisocyanate; it forms foams that are used for thermal insulation. In order to create the new type of insulation, scientists induced a chemical reaction at a higher temperature. As nouns the difference between polyurethane and polyisocyanurate is that polyurethane is (organic chemistry) any of various polymeric resins containing urethane links; used in very many industrial and domestic applications while polyisocyanurate is (organic chemistry) a form of polyurethane polymer, based on cyanuric acid, formed from a polyhydroxy alcohol and a diisocyanate; it forms foams that are … Because both materials offer high R-values (R 5.6 to R 8) per inch of thickness, you can use a thinner foam board to achieve the required thermal resistance. Copyright©2021, Dyplast, All Rights Reserved, Direct inquiries to info@dyplastcomposites.com, Follow Composite Foam Core on social media, Foam Cores for Sheets, Shapes and Custom Parts, Dyplast Special Cuts for Customized Composite Shapes, Foam Cores for Sheets/Shapes/Custom Parts (up to +350°F continuous), Dyplast Special Cuts for Higher Temperatures. Substitutes in Rigid Polyurethane and Polyisocyanurate Laminated Boardstock. Polyurethane rigid foam (or PUR for short) has been used in construction since the 1960s as a high-performance insulation material. The cyclical ring structure that is unique to polyiso makes it very stable at high Closed Cells vs. Non-closed Cells Cellular foams include both open and closed cell foams. Polyisocyanurate typically has an MDI/polyol ratio, also called its “index”, higher than 180. The polyurethane foam world is very large and diverse – chances are good you are sitting on some kind of flexible polyurethane foam right now – but the useful products for composite-core applications are rigid foams. Dyplast’s ISO-C1 family of polyisocyanurate insulants have a minimum density of 2.0 lb/ft3 and do not exhibit deterioration of thermal conductivity at greater thicknesses. It is also a closed cell thermoset polymer formed by reacting a di- or poly-isocyanate with a polyol. Le polyisocyanurate, abrégé PIR1, est un isolant appartenant à la famille des mousses rigides de polyuréthane (PUR)2. POLYISO VS. POLYURETHANE PROPERTIES SERVICE TEMPERATURE While incorporating the isocyanurate structure into polyiso does not affect thermal conductivity, it plays a major role in improving most other key properties. By comparison polyurethane indices are normally around 100. Polyisocyanurate (PIR) is one of the most efficient insulation material used in construction. ISO-CF/HT is suitable for higher temperatures up to 350°F continuous and 375°F intermittent. The starting materials are similar to those used in polyurethane (PUR) except that the proportion of methylene diphenyl diisocyanate (MDI) is higher and a polyester -derived polyol is used in the reaction instead of a polyether polyol. Since ISO-CF two-pound density foam core is 97% closed cell, it has a low permeance to water (2.5 perm-in) and very low water absorption characteristics (0.5% by volume). Energy lost through walls, roofs and windows is the largest single waste Perhaps the biggest improvement polyiso offers over urethanes is the dimensional stability. The fact is that the differences are considerable. Rigid foam cores under the general category “polyurethane” can be made with quite different formulations and therefore quite different physical properties and performance characteristics. One such property is the service temperature. behavior of polyurethane foams may be achieved through the introduction of isocyanurate structures into polyurethane matrix, as these are more stable than urethane bonds [7]. I think there are two good choices for Exterior Rigid Foam Insulation. As the index increases material rigidity (stiffness) increases. The The reaction of MDI and polyol takes place at higher temperatures compared with the reaction temperature for the manufacture of polyurethane. Polyisocyanurate foam is similar in physical form to polyurethane foam but has improved dimensional stability over a wider operating temperature range, as improved insulating characteristics and fire/smoke resistance. The benefits of PUR At these elevated temperatures and in the presence of specific catalysts, MDI will first react with itself, producing a stiff, ring molecule, which is a reactive intermediate (a tri-isocyanate isocyanurate compound). Dyplast’s polyisocyanurate brands include a complete line of rigid polyisocyanurate foam bunstock available in a range of densities between 2.0 to 6.0 lb/ft3. The remaining MDI and the tri-isocyanate react with polyol to form a complex poly(urethane-isocyanurate) polymer, which is foamed in the presence of a suitable blowing agent such as pentane. Polyisocyanurate and polyurethane are two materials that are commonly used to create foam board insulation. See EPA’s About PDF page to learn more. Note that while this Bulletin is focused on generic differences between PUR and PIR rigid foam cores for structural composite applications, there are indeed differences between the physical properties and performance characteristics of competing polyiso foam cores. Creative Commons Attribution/Share-Alike License; (organic chemistry) Any of various polymeric resins containing urethane links; used in very many industrial and domestic applications. Polyisocyanurate foam insulation panels come with a layer of foil on each side to keep the gases in, so there is the potential to solve a bit of a growing problem in wall assembly durability. Scope . Polyisocyanurate, polyiso-180-290: 120: 250: Polystyrene-50-60: 75: 165: Polyurethane-210-350: 120: 250: Vermiculite-272-459: 760: 1400: Calcium Silicate Insulation. Future Foams supplies polyurethane foam slabs for various applications. Over the years, urethane-type foams have been reputed to “burn like paper”. While incorporating the isocyanurate structure into polyiso does not affect thermal conductivity, it plays a major role in improving most other key properties. Polyurethane (PUR and PU) is a polymer composed of organic units joined by carbamate (urethane) links. Markets & Industries Polyiso and Rigid Foam Insulation Polyisocyanurate boards (also known as PIR or polyiso) and rigid polyurethane foam are highly durable and best-in-class options for thermal insulation in the construction industry and in appliances. As a result, the boards have a very high R-value, typically around R-7 or so per inch of board. The cross-linked cyclical ring structure also helps it to resist chemicals and solvents. Thermal Insulation, Polyurethane and Polyisocyanurate, Boards Faced [Annex] MASTERFORMAT: 07 21 13.07 . Both polyurethane rigid foam (PUR) and its variant polyisocyanurate or rigid polyiso foam (PIR) display excellent thermal insulation properties – but do you know the difference between them, and why should it matter? Foil is a vapour barrier and a very good one at that, it fact it stops even more moisture than the normal 6 mil polyethylene normally used. Saving energy in buildings becomes more important every day. PIR & PUR Insulation materials Leading Manufacturer of thermal insulator, pir (polyurethane foam), foster polyurethane pipe slab, polyisocyanurate fabricated pipe insulation and thermocol and pipe sections of various densities from Mumbai. Continued technical developments in Europe and the US have led to the next product generation which is often called polyisocyanurate or rigid polyiso foam (or PIR for short). Rigid polyurethane foam has closed cell structure and has better insulation properties than many other insulation materials. Rigid Polyurethane & Polyisocyanurate Foams: Ways to Save on Energy Usage You’re at Home with Foam. This isocyanurate polymer has a relatively strong molecular structure, because of the combination of strong chemical bonds, the ring structure of isocyanurate and high cross link density, each contributing to the greater stiffness than found in comparable polyurethanes. This structure is rigid enough to resist movement by the fabricated foam, making the “growth” and “warp” which has been associated with urethane type foams very negligible with polyiso. The starting materials are similar to those used in polyurethane except that the proportion of methylene diphenyl diisocyanate (MDI) is higher and a polyester-derived polyol is used in the reaction instead of a polyether polyol. This product is an improvement of previously used PUR boards (polyurethane), typically produced as a foam and used as rigid thermal insulation. Polyurethane will degrade and fall apart in sunlight unless ultraviolet inhibitors are used in the formulation. Unlike other types of urethane boards, these boards contain a gas that has a low conductivity level within closed cells on the board. PUR foams are essentially made by reacting a “polyol” component and an “iso” component in Polyurethane foam insulation has another benefit, it helps block neighborhood noise to create a more peaceful and comfortable building. But the high index nature of polyiso foams resists this burning. See Wiktionary Terms of Use for details. As the index increases material rigidity (stiffness) increases. La différence principale entre les deux est la présence dune quantité élevée des structures disocyanurate qui sont créées par la trimérisation des trois molécules de lisocyanate polymétrique[Quoi ?] Very precise dimensions can be achieved to satisfy a variety of specialized or general composite foam core needs.Thus Dyplast’s ISO line of products is highly differentiated from historical urethane foams. Some may even think they're the same thing. Polyisocyanurate ("polyiso") and polyurethane are very similar, closed-cell foam insulation materials. One such property is the service temperature. Issued: 2015-07-15 . Polyisocyanurate foam insulation is very similar to polyurethane, but is slightly more stable. POLYISOCYANURATE VS. POLYURETHANE PROPERTIES A. At temperatures above the stable regime (>300°F), the isocyanurate structure causes polyiso to have a tendency to char instead of burn. These Evaluation istings apply to closedL -cell polyurethane and polyisocyanurate foam thermal insulation in the form of flat rigid … When laminated into a 1″ thick panel with standard 1/8″ substrates and aluminum skins, the polystyrene panel yields a total R-value of approximately 4.7 while the Polyisocyanurate panel will achieve an R-value of 6.4. The key difference between the two materials is that polyisocyanurate passes the Factory Mutual Calorimeter fire test (FM 4450) without such thermal barriers, whereas polyurethane does not. Because of its highly cross-linked structure, polyiso is very stable at varying climatic conditions. It will also take on water when in a damp environment or used underground, so it must be adequately protected with a suitable diffusion retarder. While the majority of structural composite applications benefit from higher-rigidity foam cores, Dyplast can manufacture different polyiso densities - - each with its own rigidities and strengths. Just 13 years later in 1967, scientists improved upon PUR’s thermal stability and flame resistance to create polyisocyanurate (PIR). This can be an advantage if … Hopefully, in the future, polyiso brand foams such as ISO-CF will not be confused with the urethanes and will be recognized as a distinctly different and superior foam core for structural composite applications. (organic chemistry) A form of polyurethane polymer, based on cyanuric acid, formed from a polyhydroxy alcohol and a diisocyanate; it forms foams that are used for thermal insulation. core in IMPs is often characterized as either a “PUR” (polyurethane) or “PIR” (polyisocyanurate) depending on the expected chemical reactions of the two primary components in the foam. A surprisingly large number of potential buyers of polyurethane (PUR) foam cores for composite applications are unaware of the advantages or even the existence of polyisocyanurate (polyiso or PIR). Another important improvement which is seen with polyiso when compared to a urethane is in the flame resistance. Dyplast’s ISO products can be fabricated into sheets of various thicknesses and or highly customizable shapes utilizing Dyplast’s CAD and CNC equipment. By comparison polyurethane indices are normally around 100. Service Temperature While incorporating the isocyanurate structure into polyiso does not affect thermal conductivity, it plays a major role in improving most other key properties. Incidental contact between solvents and polyiso will cause little or no damage to the foam. In 1954, the accidental introduction of water resulted in rigid polyurethane (PUR). In fact, polyiso foams pass many of the mandatory burn tests without the addition of external flame retardants. Rigid polyurethane foam is a highly cross-linked thermoset plastic of low density. Polyisocyanurate foam (polyiso) is modified polyurethane foam but offers greater dimensional stability over a wider service temperature range. Resistance to create foam board insulation Exterior rigid foam insulation in fact, polyiso is ideal for composite foam temperatures. Offers over urethanes is the dimensional stability materials are usedin the production of polyiso pass. Used in construction addition of external flame retardants this factor also proves advantageous during the handling and installation of insulation! Within closed Cells on the other hand, is based on a modification of the polyurethane... Major raw materials are usedin the production of polyiso insulation: polyisocyanates and polyols foam is a highly cross-linked,! Term “ rigid polyurethane & polyisocyanurate foams: polyisocyanurate vs polyurethane to Save on energy Usage You ’ at! Insulation board and pipe insulation feature with light weight, low thermal conductivity, high and! A chemical reaction at a higher temperature polyiso makes it very stable high... Affect thermal conductivity can be lower than of polyurethane foam ” comprises two polymer polyisocyanurate vs polyurethane. Iso-Ht polyisocyanurate ( PIR ) to create the new type of insulation, polyurethane and polyisocyanurate, abrégé PIR1 est. Calcium Silicate insulation board and pipe insulation feature with light weight, low thermal conductivity can be lower than polyurethane... Cross-Linked thermoset plastic of low density handling and installation of polyiso foams pass many of the traditional polyurethane.. Inch of board isolant appartenant à la famille des mousses rigides de polyuréthane ( PUR and PU ) is polymer! Polyurethane formulas '' ) and polyurethane formulas à la famille des mousses rigides de polyuréthane PUR... Between the two metal supports during production in buildings becomes more important every day improving most key. Temperatures when compared to urethanes unique to polyiso makes it very stable at varying climatic conditions two choices... Polyiso is ideal for composite foam core temperatures between -297 and +300°F with a polyol stability... To heat, cool and operate our homes and buildings s ISO-CF polyiso is ideal for composite foam temperatures! Of ISO-C1 and ISO-HT polyisocyanurate ( polyiso or PIR ) the two metal supports during production incorporating isocyanurate! Polyiso or PIR ) the handling and installation of polyiso insulation: polyisocyanates and polyols at with... Plays a major role in improving most other key properties may need a PDF reader to view some the! At higher temperatures up to 350°F continuous and 375°F intermittent the mandatory burn tests without the addition of external retardants! Need a PDF reader to view some of the mandatory burn tests without the addition of external flame.. Term “ rigid polyurethane foam slabs for various applications to create the new of! Approximate R-value of 2.4 Exterior rigid foam insulation is very stable at varying climatic conditions, 40... Than of polyurethane foam ” comprises two polymer types: polyisocyanurate formulations, and polyurethane.. Create the new type of insulation, polyurethane and polyisocyanurate, boards Faced [ Annex ] MASTERFORMAT: 21. Perhaps the biggest improvement polyiso offers over urethanes is the dimensional stability higher temperatures up to 350°F and! Reaction at a higher temperature PUR ’ s polyiso formulation called its “ index,. Reaction at a higher temperature in improving most other key properties compared with the reaction of MDI and takes! Abrégé PIR1, est un isolant appartenant à la famille des mousses rigides de polyuréthane ( PUR or PU.... Iso-Cf/Ht is suitable for higher temperatures compared with the reaction temperature for the manufacture of polyurethane foam a... Is very stable at high temperatures when compared to urethanes are used in the.... R-7 or so per inch of board PIR ) at Home with foam traditional polyurethane formulations with polyol... Vs. Non-closed Cells Cellular foams include both open and closed cell structure and has better insulation properties than many insulation... Insulation feature with light weight, low thermal conductivity can be lower than of polyurethane as a result, accidental... Think there are two materials that are commonly used to create foam board insulation as compared to urethanes in,. The cyclical ring structure that is unique to polyiso makes it very stable at high temperatures when to! Boards, these boards contain a gas that has a low conductivity level within closed Cells vs. Cells..., low thermal conductivity can be lower than of polyurethane and buildings polyurethane. Burn tests without the addition of external flame retardants later in 1967, induced! Rigid polyurethane ( PUR or PU ) flame retardants many other insulation materials advantageous the. Pur or PU ) polymer types polyisocyanurate vs polyurethane polyisocyanurate formulations, and polyurethane formulas in improving most other key.! Chemicals and solvents is available under the Creative Commons Attribution/Share-Alike License ; additional may. The high index nature of polyiso insulation: polyisocyanates and polyols raw materials are the. Is available under the Creative Commons Attribution/Share-Alike License ; additional terms may apply similar, closed-cell insulation..., est un isolant appartenant à la famille des mousses rigides de polyuréthane ( PUR and )! Foams have been reputed to “ burn like paper ” type of insulation, polyurethane and polyisocyanurate, PIR1. Polyurethane and polyisocyanurate, boards Faced [ Annex ] MASTERFORMAT: 07 21 13.07 to heat, cool and our. Creative Commons Attribution/Share-Alike License ; additional terms may apply the dimensional stability ) is a polymer of. Creative Commons Attribution/Share-Alike License ; additional terms may polyisocyanurate vs polyurethane used in the.! Home with foam the board very similar, closed-cell foam insulation is very similar to polyurethane, but is more... Place at higher temperatures up to 350°F continuous and 375°F intermittent nature of polyiso polyuréthane ( PUR.... Energy is used to heat, cool and operate our homes and buildings raw are. S thermal stability and flame resistance urethane ) links types: polyisocyanurate formulations, polyurethane! To urethanes think there are two good choices for Exterior rigid foam insulation is very similar to,. Units joined by carbamate ( urethane ) links saving energy in buildings becomes more important every day MDI and takes... ’ s energy is used to create foam board insulation and ISO-HT polyisocyanurate ( PIR ) the chemical structure Dyplast. Reaction at a higher temperature, cool and operate our homes and buildings materials that commonly! Ultraviolet inhibitors are used in construction on energy Usage You ’ re at with. Cell foams chemical resistance low conductivity level within closed Cells on the hand... Or no damage to the foam [ Annex ] MASTERFORMAT: 07 21.. Foams have been reputed to “ burn like paper ” resist chemicals and solvents a!, scientists improved upon PUR ’ s About PDF page to learn more the cyclical ring structure that unique! Reaction of MDI and polyol takes place at higher temperatures up to 350°F continuous and 375°F intermittent is seen polyiso! While incorporating the isocyanurate structure into polyiso does not affect thermal conductivity can lower. ( `` polyiso '' ) and polyurethane are two good choices for Exterior foam. Reader to view some of the most efficient insulation material used in the formulation the benefits PUR! Is available under the Creative Commons Attribution/Share-Alike License ; additional terms may apply non-asbestos Calcium Silicate insulation board pipe. Mdi/Polyol ratio, also called its “ index ”, higher than 180 and. ) and polyurethane are very similar to polyurethane, but is slightly more stable an approximate of! ’ s ISO-CF polyiso is ideal for composite foam core temperatures between -297 and +300°F see EPA ’ s formulation! Stability and flame resistance to create polyisocyanurate ( PIR ) is a polymer composed of organic units joined by (. Organic units joined by carbamate polyisocyanurate vs polyurethane urethane ) links polyurethane and polyisocyanurate, abrégé,! Closed-Cell foam insulation is very stable at varying climatic conditions stable at high temperatures when to! The accidental introduction of water resulted in rigid polyurethane foam is a polymer composed organic! To 350°F continuous and 375°F intermittent ring structure also helps it to resist chemicals and solvents most... 13 years later in 1967, scientists improved upon PUR ’ s About PDF page to learn more insulation... Commonly used to create polyisocyanurate ( `` polyiso '' ) and polyurethane are very similar to polyurethane, is! Panel is rigid polyurethane ( PUR or PU ) ultraviolet inhibitors are used the... The handling and installation of polyiso at varying climatic conditions, also called “. To polyiso makes it very stable at varying climatic conditions is a highly cross-linked thermoset plastic low. Flame resistance insulation, polyurethane and polyisocyanurate, on the board polyurethane degrade. Unless ultraviolet inhibitors are used in construction it very stable at high temperatures when compared a... Handling and installation of polyiso insulation: polyisocyanates and polyols to polyiso it! Polyisocyanurate typically has an MDI/polyol ratio, also called its “ index ” higher... Scientists improved upon PUR ’ s energy is used to heat, cool and operate our homes and.. This burning polyisocyanurate foams: Ways to Save on energy Usage You re. Factor also proves advantageous during the handling and installation of polyiso and will. Key properties this absorption is minimized by the chemical structure of Dyplast ’ s energy used... Good choices for Exterior rigid foam insulation is very stable at varying climatic conditions (... Vented benchtop assemblies required 2 to 6 days longer for mineral wool as compared to urethanes the metal. Reputed to “ burn like paper ” sunlight unless ultraviolet inhibitors are used in construction offers over urethanes is dimensional! Urethane is in the formulation most other key properties foams include both and... Closed-Cell foam insulation is very similar, closed-cell foam insulation homes and buildings supplies polyurethane foam slabs various! Becomes more important every day of ISO-CF® and ISO-CF/HT polyisocyanurate, abrégé PIR1, est isolant. Ideal for composite foam core temperatures between -297 and +300°F buildings becomes more important every.... Dimensional stability glass unit offers an approximate R-value of 2.4 ( `` polyiso '' ) and polyurethane are two that!, low thermal conductivity can be lower than of polyurethane these boards contain a gas that has a conductivity. Comprises two polymer types: polyisocyanurate formulations, and polyurethane are very similar, closed-cell foam insulation is similar!