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Have you ever listened to the future before? Explore our Solution Center and discover practical and inspirational content that takes you from challenge to solution in no time. In electronic, electrical and appliance applications including battery housings and insulation, device cases, screens or light panels, we provide dedicated raw materials for thermoplastics, foams, films, elastomers, TPU, composites and more.

We serve a range of applications in the automotive industry including interior and exterior elements, lighting, seating and electric vehicle battery EVB packaging, using dedicated raw materials for coatings and adhesives, thermoplastics, foams, films, composites and more. We help develop applications in the construction market such as insulation, flooring, roofs, walls, facades, doors, windows or pipelines with our dedicated raw materials for coatings and adhesives, thermoplastics, foams, composites and more.

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We create the materials the future is made of. Discover the Solution Center. Get up to date on inspiring case studies and stories for your industry or application. Covestro makes additive manufacturing fit for serial production.

Covestro — leading in material solutions. Covestro is a world-leading supplier of high-tech polymer materials: innovative, sustainable and diverse. Thanks to our global presence and close proximity to our customers, we are the partner of choice for a wide variety of industries. Our products and application solutions are used in many areas of modern life. We help make cars lighter so they save fuel.

Our insulation systems protect buildings against the heat and cold to reduce energy consumption. In entertainment electronics, our products support functionality, safety and sleek design. Global commitment to the containment of the pandemic -- Covestro provides aid in Coronavirus crisis Friday, April 3, Covestro signs EUR 2.

Henkel and Covestro to combine their strengths to promote e-mobility -- Adhesive solutions for efficient Li-ion cell assembly Monday, March 2, Strengthening of the specialty films business for identification documents -- Covestro becomes shareholder of Crime Science Technology Thursday, February 27, Long-term development and sustainable innovations through venture capital -- Covestro invests in start-ups Thursday, February 27, Fiscal Further volume growth while prices remain at a low level -- Covestro achieves targets in continuing challenging market environment Wednesday, February 19, All news.

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Because our services go beyond sales.The processing of cast polyurethane systems may involve aromatic amines such as MOCA. However, while being easy to process, various constraints due to the REACH regulation may be applied to its handling in the near future. To anticipate on the opportunities to come, the first idea is to shift to another amine chain extender instead of MOCA.

On the other side, MDI based prepolymers may offer an advantageous way out. These systems allow to target specific performances.


However, manufacturers generally have to observe the processing parameters with meticulous accuracy when using conventional MDI based prepolymers. As for TDI based systems cured with MOCA, they provide easy processing and mechanical properties enabling them to suit a large variety of applications. On the other hand, like any MDI based system, they allow to target a specific performance and enable the access to a large hardness range with the same three components.

These products represent an innovation that provides manufacturers with an easy handling solution for producing polyurethane cast elastomers with an overall excellent range of properties. In fact, these products provide molders with an easy processing solution for producing polyurethane elastomers with an excellent range of properties. Compared with conventional TDI-MOCA systems, they develop better overall mechanical properties and are processed with more ease and comfort.

These characteristics make these systems suitable both for hand casting and machine casting of large parts. Moreover, these products are easy to handle and to process. With an excellent range of properties, they will be perfectly suited for applications requiring high dynamics such as wheels. Their low viscosity increase while pouring allows both hand casting and machine casting of large parts.

Business activities are focused on the manufacture of high-tech polymer materials and the development of innovative solutions for products used in many areas of daily life. The main segments served are the automotive, construction, wood processing and furniture, and electrical and electronics industries. Other sectors include sports and leisure, cosmetics, health and the chemical industry itself.

Covestro has 30 production sites worldwide and employs approximately 16, people calculated as full-time equivalents at the end of Find more information at www. Follow us on Twitter: www. Various known and unknown risks, uncertainties and other factors could lead to material differences between the actual future results, financial situation, development or performance of the company and the estimates given here.

The company assumes no liability whatsoever to update these forward-looking statements or to conform them to future events or developments. Cookies are used on this website.

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To use this website, please accept the cookies. Privacy Statement.Along with Covestro polyols, they are a key component for the production of exceptional polyurethane-based products with wide-ranging properties. They are also used as coatings to protect everyday products such as cars, trucks and buses, appliances and electronics, wood furniture and cabinetry, interior and exterior walls, floors, window frames, food packaging and, not least, marine vessels, bridges and other infrastructure.

Polycarbonates, polyurethanes, films and coatings for vehicle exteriors are light, durable, and sustainable with more design freedom. NDI-based elastomers combine the highest mechanical load-bearing characteristics with the highest dynamic load-bearing capacity. TDI-terminated prepolymers for cast polyurethane elastomers that are processed using hot casting methods.

Solventborne polyurethane coating systems provide finishes across a broad array of industrial applications. Our specialized polycarbonates and elastomers let you realize the full potential of LED and other lighting applications. At the K fair, Covestro unveiled a concept interior showcasing how its materials and technologies can support the creation of a multifunctional living space, whether for working or relaxing.

Molded foam production can be used to create flexible PU foams with complex geometries for the automotive and furniture industry. High-performing MOCA-free alternatives are set to change the face of polyurethane production — for safer and more tunable processes.

Versatile polyurethane raw materials and systems for unbeatable insulation and waterproofing performance. Polyurethane raw materials are ideal for non-reactive and reactive hot-melt systems.

Polyurethane spray technology is the basis for spray polyurethane foam SPFsprayed composite systems and spray elastomers.


Reactive polyol and polyisocyanate components for almost any adhesive application. We provide polyurethane raw materials for the formulation of waterborne and solvent-based heat-activated adhesives.

Slabstock foaming is an efficient technology for the production of flexible foam for the furniture and mattress industry. Polyurethane coatings, films and pultrusion products for the protective coating and effective insulation of doors and windows. Polyurethane coatings and sealers specially formulated to create, protect and enhance durable, long-lasting flooring. At Kattendees experienced the materials and applications driving innovation in our new multifunctional interior concept.

Aliphatic-based systems provide crystal clear, UV-stable elastomers. Our high solids and nonsolvent systems comply with strict low-VOC requirements in Europe and other regions. High-performance corrosion protection, insulation and plastics for pipelines and cables carrying valuable natural resources. Polyurethane elastomer systems formulated for the uniquely demanding conditions of off-shore cable protection.

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Our solventborne adhesive systems offer bonding technology for a wide variety of adhesives. Quasi-MDI systems provide flexibility through a broad hardness range as well as excellent resistance to tearing and abrasion.Methylene diphenyl diisocyanatemost often abbreviated as MDI, is an aromatic di isocyanate.

The 4,4' isomer is most widely used, and is also known as 4,4'-diphenylmethane diisocyanate. MDI reacts with polyols in the manufacture of polyurethane. It is the most produced diisocyanate, accounting for As ofthe largest producer was Wanhua Chemical Group. The first step of the production of MDI is the reaction of aniline and formaldehydeusing hydrochloric acid as a catalyst to produce a mixture of diamine precursors, as well as their corresponding polyamines:.

Then, these diamines are treated with phosgene to form a mixture of isocyanates, the isomer ratio being determined by the isomeric composition of the diamine. Distillation of the mixture gives a mixture of oligomeric polyisocyanates, known as polymeric MDIand a mixture of MDI isomers which has a low 2,4' isomer content.

Further purification entails fractionation of the MDI isomer mixture. The positions of the isocyanate groups influences their reactivity. In 4,4'-MDI, the two isocyanate groups are equivalent but in 2,4'-MDI the two groups display highly differing reactivities. The group at the 4-position is approximately four times more reactive than the group at the 2-position due to steric hindrance. The major application of 4,4'-MDI is the production of rigid polyurethane.

Typical polyols used are polyethylene adipate a polyester and poly tetramethylene ether glycol a polyether. MDI is the least hazardous of the commonly available isocyanates, but is not benign. However, it, like the other isocyanates, is an allergen and sensitizer.

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Persons developing sensitivity to isocyanates may have dangerous systemic reactions to extremely small exposures, including respiratory failure. Handling MDI requires strict engineering controls and personal protective equipment.

It is a potentially violently reactive material towards water and other nucleophiles. From Wikipedia, the free encyclopedia. Redirected from Desmodur Bis 4-isocyanatophenyl methane 1-Isocyanato[ 4-isocyanatophenyl methyl]benzene 4,4'-Methylene diphenyl diisocyanate 4,4'-Diphenylmethane diisocyanate Bayer Desmodur 44 Methylene bis 4-phenyl isocyanate Pure MDI.

CAS Number. Interactive image Interactive image. PubChem CID. Chemical formula. Solubility in water. LD 50 median dose. LD Lo lowest published. LC 50 median concentration. PEL Permissible. REL Recommended. IDLH Immediate danger. Related Isocyanates. Toluene diisocyanate Naphthalene diisocyanate Hexamethylene diisocyanate Isophorone diisocyanate.Aliphatic polyisocyanate HDI trimer.

As the hardener component for lightfast polyurethane coating systems. Desmodur N can be thinned with esters, ketones and aromatic hydrocarbons such as ethyl acetate, butyl acetate, methoxypropylacetate, acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, toluene. Generally speaking, it has good compatibility with the solvents listed.

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However, the solutions formed must be tested for their storage stability. Only PU grade solvents should be used max. Aliphatic hydrocarbons are unsuitable as solvents. Prolonged storage of a solution with a lower binder content may result in turbidity and sedimentation. However, the compatibility of the combinations used should always be tested.

Covestro – leading in material solutions

Desmophen or polyether polyols such as Desmophen BT. Desmodur N is used primarily as the hardener component for lightfast two-component polyurethane coatings with high resistance to chemicals and weathering, very good gloss retention and outstanding mechanical properties. Preferred co-reactants are polyacrylate or polyester polyols. The main applications for systems based on Desmodur N are air- and force-drying coatings for automotive OEM, automotive refinishing, transportation, industrial finishing and plastics.

General information: The product is sensitive to moisture. Storage at higher temperatures will result in increase of color and viscosity.


Storage at significant lower temperatures will result in solidification. This solidification is reversible by briefly heating the product without adversely affecting the quality of the product. Bayer MaterialScience represents that, for a period of six months following the day of shipment as stated in the respective transport documents, the product will meet the specifications or values set forth in section "specifications or characteristic data" above, what ever is applicable, provided that the product is stored in full compliance with the storage conditions set forth in and referenced under section "storage" above and is otherwise handled appropriately.

The lapse of the six months period does not necessarily mean that the product no longer meets specifications or the set values.

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However, prior to using said product, Bayer MaterialScience recommends to test such a product if it still meets the specifications or the set values. Bayer MaterialScience does not make any representation regarding the product after the lapse of the six months period and Bayer MaterialScience shall not be responsible or liable in any way for the product failing to meet specifications or the set values after the lapse of the six months period.Login to see your most recently viewed materials here.

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Or if you don't have an account with us yet, then click here to register. It is suitable for use as the hardener component for lightfast polyurethane coating systems. Preferred co-reactants are polyacrylate or polyester polyols. The main applications for systems based on Desmodur N A are air- and force-drying coatings for automotive OEM, automotive refinishing, transportation, industrial finishing and plastics.

As with any product, use of Desmodur N A crosslinker in a given application must be tested including but not limited to field testing in advance by the user to determine suitability. To see MatWeb's complete data sheet for this material including material property data, metal compositions, material suppliers, etcplease click the button below.

System Message. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error.

We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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Polymer ; Thermoset ; Polyurethane, TS. Information provided by Covestro. Property Data This page displays only the text of a material data sheet. Follow MatWeb. Please read our License Agreement regarding materials data and our Privacy Policy.

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