PMDI MDI for Pre Insulated District Heating Pipes with High Temperature Resistance Dimensional Stability and Long Service Life

Product Description

Product Description

Polymeric MDI (PMDI), also known as Polymethylene Polyphenyl Polyisocyanate (CAS No. 9016-87-9, EINECS No. 922-627-7), is a complex mixture of MDI monomers and higher-functionality oligomers. It is one of the most important polyisocyanates in the global polyurethane industry, serving as a cornerstone raw material for the production of rigid polyurethane foams, adhesives, coatings, elastomers, and composite materials.
PMDI is characterized by its multiple isocyanate (-NCO) functional groups, which enable it to react readily with polyols to form robust polyurethane polymers with excellent mechanical strength, thermal insulation, and chemical resistance. Its high nominal functionality (typically 2.7 or above) makes it particularly suitable for producing rigid, cross-linked polyurethane structures with outstanding dimensional stability and load-bearing capacity.

Specification

Item	Value
Classification	Other Adhesives
Main Raw Material	Polymethylene polyphenyl polyisocyanate
EINECS No.	922-627-7
CAS No.	9016-87-9
MF	C15H10N2O2
Type	Silicone sealant
Color	Brown liquid
Shelf Life	12 Months
Form	Liquid Form
Function	Polyurethane foam
Molecular Weight	149.14668
NCO Content	30.5-32%
Viscosity (25℃) (mPas)	170-250
EHC	<250

Usage

Rigid Polyurethane Foam (Core Application) — PMDI is the backbone of rigid PU foam production, which is widely used for thermal insulation in building panels, cold storage facilities, refrigerators, freezers, refrigerated trucks, pipe insulation, and spray foam insulation systems. The closed-cell foam structure provides exceptional thermal resistance (low k-value) and structural integrity.
Adhesives & Sealants — Used as a high-performance binder in polyurethane adhesives for woodworking, automotive assembly, construction, footwear, and packaging. PMDI-based adhesives offer strong adhesion, flexibility, moisture resistance, and chemical durability.
Wood-Based Panel Binders — PMDI is increasingly used as a formaldehyde-free binder in the manufacture of oriented strand board (OSB), medium-density fiberboard (MDF), and particleboard. Compared to traditional urea-formaldehyde resins, PMDI-based binders deliver superior internal bond strength, water resistance, and environmental safety.
Coatings & Elastomers — PMDI-based polyurethane coatings provide excellent abrasion resistance, chemical resistance, and flexibility for industrial, automotive, and marine applications. PMDI is also used in the production of elastomers such as shoe soles, industrial wheels, conveyor belts, and automotive components.
Composite Materials — Serves as a high-performance binder in composite manufacturing, contributing to the strength, rigidity, and stability of structural components used in automotive, aerospace, and construction industries.
Structural RIM (Reaction Injection Molding) — PMDI is suitable for structural RIM processing, producing high-strength, lightweight components for automotive body panels, truck fairings, and industrial equipment housings.

Packaging & Shipping

Packaging

Shipping

Standard Packaging: 250 kg steel drums with tightly sealed lids and chemical-resistant gaskets
Bulk Packaging: IBC tanks (1000 kg) or ISO tanks for large-volume orders
Custom Packaging: Available upon request (including neutral packaging and OEM labeling)
Inner Protection: Containers are flushed with dry-nitrogen before filling to prevent moisture contamination
Labeling: Each package is clearly marked with product name, CAS number, batch number, production date, net weight, hazard symbols, and emergency contact information

Classification: PMDI is classified as a hazardous chemical (isocyanate compound) and must be transported in compliance with applicable dangerous goods regulations (IMDG for sea freight, ADR/RID for road/rail, IATA for air freight)
Container Requirements: Use corrosion-resistant, tightly sealed containers; drums must be secured with foam padding and separator boards to prevent collision damage during transit
Moisture Protection: Transport must be kept dry — containers must be protected from rain, humidity, and water exposure at all times
Temperature Control: Avoid prolonged exposure to temperatures below 5°C (risk of crystallization) or above 50°C (risk of polymerization and viscosity increase)
Ventilation: Transport vehicles must be well-ventilated
Segregation: Keep away from water, alcohols, amines, strong oxidizers, and heat sources during transportation
Documentation: Safety Data Sheet (SDS/MSDS), Certificate of Analysis (COA), and proper shipping declarations must accompany every shipment
Loading Quantity: 20ft container: approx. 16–20 MT; 40ft container: approx. 20–25 MT (depending on packaging type)

Certifications

Our Company

FAQ

*What are the main applications of this Polymeric MDI?
It is widely used for rigid polyurethane foams, semi-rigid foams for automotive sound insulation, soft self-crusting foams, high resilience foams, packaging foams, sealing materials, and adhesives.

*What packaging options are available?
The product is available in 250kg drums or 1250kg IBC containers to ensure seamless handling and storage.

*What is the Minimum Order Quantity (MOQ)?
The Minimum Order Quantity is 250 Kgs.

*What are the payment terms?
We accept LC, D/P, PayPal, and T/T as terms of payment.

*Is customization available for this product?
Yes, we offer full customization, minor customization, and flexible customization from samples.

*What is the average lead time for delivery?
The average lead time is within 15 workdays for both peak season and off-season.

*What grades of Polymeric MDI are offered?
We offer PM200, M-20S, 44V20L, PAPI 27, M-200, and PAPI 135 grades.