What is Isocyanate CAS 9016-87-9?

CAS 9016-87-9 identifies polymeric MDI, also called PMDI or polymethylene polyphenyl isocyanate. It is an aromatic polymeric mixture containing multiple NCO groups, commonly represented by the general formula [C6H3(NCO)CH2]n, and is supplied as a dark brown liquid.

What does the NCO content of this polymeric MDI indicate?

The NCO content is the mass percentage of reactive isocyanate groups in the product. A typical PMDI grade has about 30.5%-32.0% NCO, which provides high functionality and dense cross-linking, giving rigid polyurethane systems their compressive strength and dimensional stability.

Which applications use Isocyanate CAS 9016-87-9?

It is used mainly as the isocyanate component for rigid polyurethane foam insulation, composite panels, cold-chain refrigeration, and structural applications. It also appears in industrial adhesives and binders, including OSB/MDF bonding and recycled rubber flooring, as well as waterproof coatings and polyurea systems.

How should Isocyanate CAS 9016-87-9 be stored and handled?

Polymeric MDI is highly moisture sensitive because water reacts with NCO groups, producing carbon dioxide and insoluble polyureas. It should be stored in tightly sealed, dry containers under nitrogen and kept within a controlled temperature range, with adequate ventilation and suitable protective equipment during handling.

Isocyanate CAS 9016-87-9

Isocyanate (CAS 9016-87-9) is a highly reactive aromatic synthetic macromolecule containing multiple NCO functional groups, serving as a foundational reactant within the broader category of Chemical Intermediates. Operating as a critical cross-linking agent, this versatile polymeric MDI interacts with polyols in rapid exothermic reactions to produce rigid polyurethane matrices, making the polymethylene polyphenyl isocyanate essential for developing advanced thermal insulation foams and industrial composite panels. Its precise NCO content provides optimal curing kinetics, structural rigidity, and exceptional adhesion properties when deployed as a primary polyurethane hardener in continuous structural manufacturing environments. To support uninterrupted industrial processing schedules, our facility maintains extensive bulk supply capabilities, ensuring consistent lot-to-lot reactivity with customized specifications to meet precise viscosity and NCO percentage requirements, all supported by competitive factory pricing and comprehensive technical documentation including MSDS, TDS, COA.

CAS: 9016-87-9
Synonyms: Polymeric MDI, PMDI, Polymethylene polyphenyl isocyanate, Polyurethane hardener
Einecs: 618-498-9
Grade: Industrial Grade
Package: 250kg/iron drum, 1250kg/IBC tank

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Product Description

Technical Data

Physicochemical Properties	Standard Specification (Standard PMDI Grade)
Appearance	Dark brown transparent liquid
NCO Content	30.5% – 32.0%
Viscosity (at 25°C)	150 – 250 mPa·s
Acidity (as HCl)	≤ 0.05%
Hydrolyzable Chlorine	≤ 0.2%
Density (at 25°C)	1.22 – 1.25 g/cm³
Flash Point (Open Cup)	> 200°C
Solubility	Reacts with water; soluble in aromatic and chlorinated hydrocarbons

Applications:

Rigid Polyurethane Foam: Functions as the primary reactive “B-side” component combined with polyether polyols to extrude rigid thermal insulation boards for commercial construction and cold-chain refrigeration units.
Industrial Adhesives & Binders: Utilized as a heavy-duty moisture-curing binding agent in the production of oriented strand board (OSB), medium-density fiberboard (MDF), and recycled rubber crumb flooring.
Elastomers & Coatings: Applied in the formulation of high-performance anti-corrosion polyurea systems and waterproof polyurethane coatings intended for harsh industrial environments.

For two-component coatings that specify an aliphatic crosslinker, HDI Trimer is a separate isocyanate hardener.

Storage & Safety:

Storage Conditions: Isocyanates are highly sensitive to moisture. Material must be stored in tightly sealed, dry containers under a nitrogen blanket within a temperature-controlled warehouse (15°C to 35°C). Exposure to water generates insoluble polyureas and carbon dioxide gas, which can dangerously pressurize sealed containers.
Safety & Handling: This chemical is a known respiratory sensitizer and irritant. Industrial handling requires rigorous local exhaust ventilation. Operators must be equipped with supplied-air respirators (in poorly ventilated areas), chemical-resistant nitrile gloves, and splash-proof goggles to prevent dermal contact and vapor inhalation.

Quality Assurance:

Our chemical production lines operate under rigorous ISO 9001 quality management frameworks. Every batch undergoes advanced analytical verification, utilizing automated potentiometric titration to precisely quantify the NCO mass fraction. We strictly monitor viscosity variations and acidity levels to ensure the reaction kinetics and cross-linking density of the polymer matrix perfectly align with international polyurethane manufacturing standards.

FAQ - Technical & Supply Chain

Q:
What is Isocyanate CAS 9016-87-9?

A: CAS 9016-87-9 identifies polymeric MDI, also called PMDI or polymethylene polyphenyl isocyanate. It is an aromatic polymeric mixture containing multiple NCO groups, commonly represented by the general formula [C6H3(NCO)CH2]n, and is supplied as a dark brown liquid.
Q:
What does the NCO content of this polymeric MDI indicate?

A: The NCO content is the mass percentage of reactive isocyanate groups in the product. A typical PMDI grade has about 30.5%-32.0% NCO, which provides high functionality and dense cross-linking, giving rigid polyurethane systems their compressive strength and dimensional stability.
Q:
Which applications use Isocyanate CAS 9016-87-9?

A: It is used mainly as the isocyanate component for rigid polyurethane foam insulation, composite panels, cold-chain refrigeration, and structural applications. It also appears in industrial adhesives and binders, including OSB/MDF bonding and recycled rubber flooring, as well as waterproof coatings and polyurea systems.
Q:
How should Isocyanate CAS 9016-87-9 be stored and handled?

A: Polymeric MDI is highly moisture sensitive because water reacts with NCO groups, producing carbon dioxide and insoluble polyureas. It should be stored in tightly sealed, dry containers under nitrogen and kept within a controlled temperature range, with adequate ventilation and suitable protective equipment during handling.

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