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Addolink H EP is widely employed in the formulation of polyurethane coatings, where it contributes to enhanced durability and chemical resistance.
Addolink H EP is a versatile additive that provides manufacturers with the ability to fine-tune the curing characteristics of polyurethane systems, leading to improved performance in both elastomeric and coating applications.
Addolink H EP is a high-performance crosslinking agent primarily used in polyurethane (PU) systems, especially in applications requiring precise control over mechanical properties, such as elastomers, coatings, and adhesives.
CAS Number: 1651211-78-7
Molecular Formula: C19H27I2N3O9
Molecular Weight: 695.24
Synonyms: N1,N3-bis(2,3-dihydroxypropyl)-5-(N-(2,3-dihydroxypropyl)acetamido)-2,4-diiodoisophthalamide, 6RW73AZD5U, 1651211-78-7, Q27265396, (+/-)-N1,N3-BIS(2,3-DIHYDROXYPROPYL)-5-(N-(2,3-DIHYDROXYPROPYL)ACETAMIDO)-2,4-DIIODOISOPHTHALAMIDE, 5-(ACETYL(2,3-DIHYDROXYPROPYL)AMINO)-N,N'-BIS(2,3-DIHYDROXYPROPYL)-2,4-DIIODOBENZENE-1,3-DICARBOXAMIDE1,3-Benzenedicarboxamide, 5-[acetyl(2,3-dihydroxypropyl)amino]-N1,N3-bis(2,3-dihydroxypropyl)-2,4-diiodo-, Iohexol ImpuritiesH
Addolink H EP is 1,4-butane diol with special retarder.
Acts as a crosslinking agent for the production of high modulus polyurethane elastomers (hot-curing cast systems).
Addolink H EP is hygroscopic at a temperature of 20°C, it can be stored for 6 months.
Addolink H EP is a specialized chemical additive developed by LANXESS, primarily utilized as a crosslinking agent in the production of high-performance polyurethane systems.
Addolink H EP is based on 1,4-butanediol and incorporates a unique retarder, which allows for precise control over the curing process of polyurethanes.
This control is essential for manufacturing applications that require specific mechanical properties and processing conditions.
In the context of polyurethane elastomers, particularly those produced through hot-curing casting methods, Addolink H EP plays a crucial role in achieving high modulus and durability.
The inclusion of the retarder component enables manufacturers to adjust casting and demolding times, thereby optimizing the production process for efficiency and product quality.
These properties are vital for coatings that must withstand harsh environmental conditions and chemical exposures
Addolink H EP is a modified version of 1,4-butanediol, containing a special retarder component that enables better control over the curing time, making it particularly useful in hot-cast elastomer production and other demanding polyurethane applications.
In industrial settings, Addolink H EP is valued because it allows manufacturers to delay the gelation and curing of the polyurethane mixture, which provides more working time during casting or processing.
This extended pot life is especially beneficial when dealing with complex molds, large components, or when a high level of precision is required during part assembly or shaping.
One of the most significant advantages of using Addolink H EP is its ability to enhance the physical properties of the final polyurethane product, such as tensile strength, elasticity, and resistance to abrasion and chemicals.
This makes it an ideal component in the production of heavy-duty elastomeric parts used in mining, construction, and automotive industries, where durability and reliability are critical.
Addolink H EP is particularly well-suited for use in MDI-based (methylene diphenyl diisocyanate) polyurethane systems, where it functions not only as a chain extender but also as a functional component that influences the kinetics of the curing process.
By modifying the reactivity profile of the system, it enables the user to precisely tailor the hardness, flexibility, and structural integrity of the final polyurethane material to meet the requirements of the intended application.
In production processes involving hot-cast elastomers, such as rollers, wheels, bushings, or impact-resistant pads, the use of Addolink H EP allows for greater control over demolding times, ensuring that parts can be handled or machined sooner without compromising the strength and durability of the finished product.
This translates to shorter production cycles, less downtime, and increased overall efficiency in factory operations.
Boiling point: 878.1±65.0 °C(Predicted)
Density: 1.980±0.06 g/cm3(Predicted)
pka: 12.29±0.46(Predicted)
Addolink H EP is its built-in retarder, which is not a separate additive but chemically integrated into the formulation.
This innovation ensures that the reactivity is managed internally, without the need for multiple additives, simplifying the formulation process and reducing the chances of formulation errors or inconsistencies during batch production.
In demanding industrial environments where materials are exposed to abrasion, mechanical stress, water, oil, fuels, or aggressive chemicals, Addolink H EP contributes significantly to the performance of polyurethane components.
Addolink H EP helps produce materials with excellent hydrolysis resistance, thermal stability, and dimensional stability over time, even in applications involving continuous exposure to stress and environmental extremes.
Furthermore, the versatility of Addolink H EP makes it compatible with a wide range of isocyanate prepolymers and polyurethane formulations, including systems used in mining equipment, marine coatings, conveyor belts, seals, and shock absorbers.
This adaptability means that manufacturers across different sectors can rely on a single additive to meet diverse production requirements, enhancing supply chain efficiency and material compatibility.
Addolink H EP react with isocyanates to polar urethane or urea domains which can agglomerate via intermolecular interactions and build stiff, crystalline “hard segments” as opposed to flexible “soft segments” built up by long-chained polyols.
This segmented structure is responsible for the excellent mechanical properties of PUR elastomers. LANXESS offers Addolink H EP suitable for TDI- as well as MDI-based polyurethane prepolymers.
In addition to its role in elastomer processing, Addolink H EP is also used in polyurethane coatings and sealants, where it improves film hardness, weatherability, and resistance to aggressive chemicals or environmental stress.
As a result, coatings made with this additive are suitable for protective applications on metal, wood, or concrete surfaces, extending the life of the substrate in harsh environments.
Moreover, because of its retarder component, Addolink H EP helps minimize waste and improves efficiency during manufacturing by reducing the likelihood of premature curing or defective parts.
This makes it an excellent choice for operations that require both high throughput and consistent product quality.
In summary, Addolink H EP is a specialized crosslinker for polyurethane systems that offers extended processing times, enhanced durability, and improved performance in both elastomeric and coating applications.
It is widely used in industries that require long-lasting, chemically resistant, and mechanically strong PU products.
Addolink H EP also contributes to sustainability goals in manufacturing by reducing waste from poorly cured parts and enabling the production of long-lasting materials that do not require frequent replacement.
Its extended processing window reduces pressure on production timing and enhances worker safety by minimizing the risks associated with handling fast-curing, heat-sensitive systems.
Uses Of Addolink H EP:
Addolink H EP is primarily used in the production of polyurethane elastomers where high mechanical strength, abrasion resistance, and durability are critical; for example, it is commonly used in manufacturing components such as industrial wheels, rollers, bushings, and conveyor belts that are subject to constant mechanical stress and wear in heavy-duty environments like mining, construction, and material handling.
Another key use of Addolink H EP lies in casting applications, especially in hot-cast polyurethane systems, where it serves as both a chain extender and a built-in reaction retarder, allowing manufacturers to slow down the curing process and extend the pot life of reactive mixtures; this is extremely beneficial in the production of large, intricate, or complex-shaped parts where longer working time is required for proper molding and casting before the material begins to solidify.
In the field of coatings and surface protection, Addolink H EP is used in polyurethane-based protective coatings that require high chemical resistance, weatherability, and mechanical stability; such coatings are often applied to metal, concrete, or wood surfaces in industrial plants, marine vessels, or automotive components to prevent corrosion, wear, and chemical damage, thereby extending the life of the underlying substrate.
This additive is also utilized in adhesives and sealants where flexible but durable bonds are necessary, such as in bonding dissimilar materials (e.g., metal-to-rubber or plastic-to-metal), where its use enhances the toughness, elongation properties, and resistance to thermal cycling, ensuring long-lasting adhesion even under challenging environmental conditions.
Addolink H EP finds an important role in the production of polyurethane parts used in dynamic mechanical systems, such as dampers, engine mounts, and shock absorbers in the automotive or aerospace industries, where it helps in producing elastomeric materials with excellent rebound resilience, low compression set, and stability under dynamic loads.
In addition, because of its ability to influence the crosslinking density and mechanical profile of polyurethane systems, Addolink H EP is often used in custom formulations for research, development, and prototyping, especially when engineers or chemists are looking to balance flexibility and hardness or optimize curing behavior for novel product designs.
Its usage is not limited to high-end industrial applications alone; it can also be found in consumer-grade polyurethane products such as sports equipment, skate wheels, shoe soles, and flexible foam components, where improved comfort, impact resistance, and longevity are desired.
Addolink H EP makes it particularly attractive for use in automated production lines, where timing, precision, and repeatability are critical, and where a delay in cure time can help reduce machine downtime, improve process flexibility, and enhance overall production quality.
Addolink H EP is extensively used to manufacture resilient, long-lasting mechanical parts such as drive belts, couplings, and vibration dampers, where the combination of flexibility and strength is essential; its ability to fine-tune the curing profile allows for better control of the hardness and elasticity balance, which is critical in applications that require repeated flexing and energy absorption.
It is especially valuable in the off-road and heavy equipment industries, where polyurethane parts are exposed to abrasive materials, high impact forces, and environmental degradation, because Addolink H EP contributes to the production of elastomers that retain their shape and functionality even after thousands of load cycles and exposure to extreme conditions, such as mud, heat, or hydraulic fluids.
In mining and quarrying operations, it is used to produce highly durable linings, scrapers, and wear plates that can handle constant friction and abrasion from rocks, sand, and slurry; this application benefits greatly from the ability of Addolink H EP to improve the hydrolysis resistance and thermal stability of the final product, ensuring that these components last longer and require less frequent replacement, thereby reducing operational downtime.
Addolink H EP enables the creation of noise- and vibration-dampening parts that are essential for vehicle comfort and safety — such as bushings, engine mounts, and suspension isolators — which must maintain consistent performance across a wide range of temperatures and operating conditions; its use ensures the material will not prematurely harden, crack, or deform under thermal or mechanical stress.
Its utility in polyurethane coatings extends to environments that require both aesthetic and functional performance, such as industrial flooring, tank linings, and pipeline coatings, where the cured material needs to resist chemicals like solvents, oils, and cleaning agents while also retaining color stability, gloss, and smooth surface finish over time.
Safety Profile Of Addolink H EP:
Although Addolink H EP is widely used in industrial polyurethane formulations due to its performance-enhancing properties, it is still a chemical substance that must be handled with caution, especially in production environments where exposure risks are elevated through regular handling, mixing, or heating.
Like many chemical crosslinkers and chain extenders used in polyurethane systems, Addolink H EP can pose health hazards if proper safety precautions are not followed, particularly during the stages of storage, transfer, and application.
From a toxicological perspective, Addolink H EP may cause skin and eye irritation upon direct contact, especially if protective gloves and safety goggles are not worn during handling; prolonged or repeated exposure can increase the risk of dermatitis or other forms of skin sensitization, particularly in individuals with preexisting allergies or sensitivities to reactive chemicals like diols or amines.
Inhalation of vapors, mists, or aerosols generated during processing — particularly at elevated temperatures used in hot-cast polyurethane operations — may cause respiratory tract irritation, which can lead to coughing, shortness of breath, or even more severe symptoms such as bronchial inflammation or allergic respiratory responses over time.
If Addolink H EP is handled in poorly ventilated areas, workers may experience headaches or dizziness due to low-level inhalation of fumes, especially if heating equipment causes thermal decomposition.
