4,4'-Diphenylmethane Diisocyanate CAS 101-68-8
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Factory Supply 4,4'-Diphenylmethane Diisocyanate CAS 101-68-8 with Best Price
- Appearance: Yellow powder
- Purity: 99. 0%min
- Stock: In stock
- Sample: Available
- Zhishang Chemical: 4,4′-Diphenylmethane Diisocyanate Supplier & Manufacturer
4,4'-Diphenylmethane Diisocyanate: The Complete Guide
- Item 1: Basic Info of 4,4'-Diphenylmethane Diisocyanate
- Item 2: What is 4,4'-Diphenylmethane Diisocyanate?
- Item 3: 4,4'-Diphenylmethane Diisocyanate Uses
- Item 4: The Manager has Something to Say
- Item 5: Application of 4,4'-Diphenylmethane Diisocyanate
- Item 6: Preparation of 4,4'-Diphenylmethane Diisocyanate
- Item 7: Quality Control of 4,4'-Diphenylmethane Diisocyanate
- Item 8: Hot Sale Products
- Item 9: Get 4,4'-Diphenylmethane Diisocyanate Quotation
4,4'-Diphenylmethane Diisocyanate for Sale
Basic Info of 4,4'-Diphenylmethane Diisocyanate
Basic Info
Chemical Properties
Other Info
Basic Info
Chemical Name: | 4,4′-Diphenylmethane Diisocyanate |
Other Name: | 4,4-Diphenylmethane diisocyanate; 4,4′-MDI; Methylenebis[4-phenyl isocyanate]; Methylene diphenyl diisocyanate; Covestro Desmodur |
CAS: | 101-68-8 |
EINECS: | 202-966-0 |
Type: | Organic raw materials; Auxiliary |
Molecular Formula: | C15H10N2O2 |
Molecular Weight: | 250.25 |
Chemical Properties
Melting point | 38-44 °C |
Boiling point | 392 °C |
density | 1.19 |
vapor pressure | 0.066 hPa (20 °C) |
refractive index | 1.5906 (estimate) |
Fp | 196 °C |
storage temp. | -20°C |
solubility | 2g/l (decomposition) |
form | neat |
Specific Gravity | 1.180 |
explosive limit | 0.4%(V) |
Water Solubility | decomposes |
FreezingPoint | 37℃ |
Sensitive | Moisture Sensitive/Lachrymatory |
Exposure limits | TLV-TWA 0.051 mg/m3 (0.005 ppm) (ACGIH and NIOSH); ceiling (air) 0.204 mg/m3 (0.02 ppm)/10 min (NIOSH and OSHA); IDLH 102 mg/m3 (10 ppm). |
Stability: | Stable. Combustible. Incompatible with strong oxidizing agents. Reacts violently with alcohols. |
Other Info
Brand Name: | Zhishang Chemical |
Provide: | 4,4′-Diphenylmethane Diisocyanate MSDS; 4,4′-Diphenylmethane Diisocyanate COA |
What is 4,4'-Diphenylmethane Diisocyanate?
4,4 ‘- Diphenylmethane diisocyanate (MDI) is used to manufacture various polyurethane products – elastic and hard foam, paint, varnish, adhesive, adhesive, synthetic rubber and elastic fiber.
Methylene diphenyl diisocyanate (MDI) is a kind of aromatic diisocyanate. Three isomers are common and vary depending on the position of the isocyanate group around the ring: 2,2 ‘- MDI, 2,4’ – MDI, and 4,4 ‘- MDI. The 4,4 ‘isomer is the most widely used, also known as 4,4’ – diphenylmethane diisocyanate. This isomer is also known as pure MDI. MDI reacts with polyols when manufacturing polyurethane. It is the largest production of diisocyanate, accounting for 61.3% of the global market in 2000. The total output of global MDI and aggregate MDI exceeds 7.5 million tons per year (2017).
As of 2019, the largest producer is Wanhua Chemical Group. Other major producers include Covestro, BASF, Dow, Huntsman, Dongcao and Jinhu Mitsui Chemical. All major producers of MDI are members of the International Isocyanate Association, which aims to promote the safe handling of MDI and TDI in the workplace, community and environment.
4,4'-Diphenylmethane Diisocyanate Uses
- Diphenylmethane 4,4-diisocyanate is used to prepare polyurethane resin and polyurethane fiber; Adhesion of rubber and rayon; Diisocyanate is used to produce polyurethane paint, foam plastic, rubber and glue.
- Diphenylmethane-4,4-diisocyanate (MDI) is widely used in the production of rigid polyurethane foam products, coatings and elastomers.
- Diphenylmethane diisocyanate (MDI) is widely used in polyurethane coatings. This product is made of polyurethane foam, which is used for heat preservation (cold), building materials, vehicles and ship parts; Masterpieces can be used to make car seat cushion, cushion, synthetic leather, plastic free polyurethane, polyurethane elastic fiber, plastic free elastic fiber, film and adhesive.
- Uses of diphenylmethane diisocyanate include UV curable and polymerization reaction compositions containing latent catalysts.
The Manager has Something to Say
This is William, CEO of Zhishang Chemical Co., Ltd.
Welcome to visit our factory . As the top chemical manufacturer, we have been striving for product quality, innovation , R&D, and customer service for the past 7 years. In the next 10 years or even longer, we are committed to becoming the most reliable chemical supplier in the world , creating a well-known international brand trusted by customers, with the spirit of “one meter wide, ten thousand meters deep”, we continue to focus on product research and development, continue to focus on customer service, continue to improve the supply chain service system, to create a professional chemical supply service team, to achieve win-win long-term cooperation. Please feel free to contact us if you have any questions.
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Application of 4,4'-Diphenylmethane Diisocyanate
The main application of 4,4 ‘- MDI is to produce rigid polyurethane. These rigid polyurethane foam are good thermal insulation materials and are used in almost all refrigerators and refrigerators and buildings in the world. Typical polyols used are poly (adipic acid) (a polyester) and poly (tetramethylene ether) glycol (a polyether).
4,4 ‘- MDI is also used as an industrial strength adhesive and can be provided to the final consumers as various high-strength bottled glue preparations.
Preparation of 4,4'-Diphenylmethane Diisocyanate
The first step in the production of MDI is the reaction of aniline and formaldehyde. Hydrochloric acid is used as a catalyst to generate a mixture of diamine precursors and their corresponding polyamines:
These diamines are then treated with phosgene to form isocyanate mixtures, and the proportion of isomers is determined by the composition of the isomers of the diamine. This transformation may have two different reaction mechanisms, namely “phosgenation first” and “gradual phosgenation”.
Distillation of the mixture yields a mixture of oligomeric polyisocyanates, called polymeric MDI, and a mixture of MDI isomers with low 2,4 ‘isomer content. Further purification requires fractionation of MDI isomer mixture.
Reference
- Methylene diphenyl diisocyanate – WikiPedia
- 4,4′-Diphenylmethane diisocyanate – PubChem
4,4'-Diphenylmethane Diisocyanate Supplier and Manufacturer
As a 4,4′-diphenylmethane diisocyanate supplier and manufacturer with a strict standard product quality system certificate, Zhishang Chemical has long been providing the best 4,4′-diphenylmethane diisocyanate raw materials to customers all over the world.
Over the years, relying on professional team experience and customer-centric team concept to meet customer needs in a timely manner, our company enjoys a high reputation in the world. At present, our company has served more than 6,000 customers and has established long-term cooperative relations with customers from many countries.
If you have a demand for 4,4′-diphenylmethane diisocyanate and related products, please contact our service staff Zhishang Chemical – White directly, and we will provide you with high-quality products at the best price.
Service
FAQ
Shipping
Service
Pre-Sales Service
* Prompt reply and 24 hours online, professional team to provide the best price and high-quality product.
* Sample testing support.
* Every batch of products will be tested to ensure its quality.
* The packing also can be according to the customers` requirement.
* Any inquiries will be replied to within 24 hours.
* We provide a Commerical Invoices, Packing Lists, Bills of loading, COA, Health certificates, and Origin certificates. If your markets have any special requirements, let us know.
After-Sales Service
* The fact of logistics information monitoring.
* Any questions about the product can be consulted at any time.
* Product has any problem can return.
FAQ
Do you accept sample order?
We will make samples before mass production, and after the sample is approved, we’ll begin mass production. Doing 100% inspection during production, then doing random inspection before packing.
What’s your MOQ?
Our MOQ is 1kg. But usually we accept less quantities, such as 100g on the condition that the sample charge is 100% paid.
Is there a discount?
The different quantity has different discount.
HOW TO CONFIRM THE PRODUCT QUALITY BEFORE PLACING ORDERS?
You can get free samples for some products, you only need to pay the shipping cost or arrange a courier to us and take the samples. You can send us your product specifications and requests, we will manufacture the products according to your requests.
Do you supply product report?
Yes. We’ll give you product analysis report before shipping.
Shipping
1. ≤50kg, Express delivery recommended, usually called DDU service;
2. ≤500kg, Air shipping recommended, usually called FOB, CFR, or CIF service;
3. >500kg, sea shipping recommended, usually called FOB, CFR, or CIF service;
4. For high-value products, please select air shipping and express delivery for safe.
Quality Control of 4,4'-Diphenylmethane Diisocyanate
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