9016-87-9

Basic information

• Product Name: Polymethylene polyphenyl polyisocyanate
• Synonyms: coronatemr200;cr200;desmodur44v20;desmodurpu1520a20;e534;isobind100;isocyanate580;isocyanatedepolymethyleneetdepolyphenyle
• CAS NO: 9016-87-9
• Molecular Formula: C8H7NO2
• Molecular Weight: 149.14668
• EINECS: 922-627-7
• Product Categories: Engineering Polymers;Formaldehyde Copolymers and Epoxies;Polymer Science
• Mol File: 9016-87-9.mol
• Article Data: 0

Chemical Properties

• Boiling Point: 392 °C5 mm Hg
• Flash Point: >230 °F
• Appearance: /
• Density: 1.2 g/mL at 25 °C(lit.)
• Vapor Density: 8.6 (vs air)
• Refractive Index: n20/D 1.634
• Storage Temp.: Refrigerator, Under inert atmosphere
• Solubility: DMSO (Sparingly), Ethyl Acetate (Slightly), Methanol (Soluble)
• Stability: Stable. Incompatible with strong oxidizing agents, alcohols. May decompose in moist air, or on contact with water.
• CAS DataBase Reference: Polymethylene polyphenyl polyisocyanate(CAS DataBase Reference)
• NIST Chemistry Reference: Polymethylene polyphenyl polyisocyanate(9016-87-9)
• EPA Substance Registry System: Polymethylene polyphenyl polyisocyanate(9016-87-9)

Safety Data

• Hazard Codes: Xn,T+,T,F
• Statements: 20-36/37/38-42-42/43-26-22-39/23/24/25-23/24/25-11-20/21/22
• Safety Statements: 26-28-38-45-36/37-23-16-7-36
• WGK Germany: 3
• RTECS: TR0350000
• Hazardous Substances Data: 9016-87-9(Hazardous Substances Data)

Usage

Description

Polymethylene polyphenyl polyisocyanate, also known as a polymer of diphenylmethane-4,4′-diisocyanate, is an engineering polymer characterized by its dark-brown liquid form with a weak odor. It has the unique property of sinking in water and is known for its chemical properties as a liquid.

Uses

Used in the Polymer Industry:
Polymethylene polyphenyl polyisocyanate is used as a key component in the synthesis of highly resilient polyurethane foams. These foams are valued for their enhanced flame retardancy, making them suitable for various applications where fire safety is a concern.
Used in the Environmental Sector:
Despite its utility, Polymethylene polyphenyl polyisocyanate is recognized as an environmental toxin and is listed on the US EPA Toxic Release Inventory (TRI). This listing underscores the need for careful handling and regulation in its production and use to minimize environmental impact.

Air & Water Reactions

Reacts with water slowly forming heavy scum and liberating carbon dioxide gas. Dangerous pressure can build up if container is sealed.

Reactivity Profile

Polymethylene polyphenyl polyisocyanate reacts with water slowly forming heavy scum and liberating carbon dioxide gas. Dangerous pressure can build up if container is sealed. Base-catalysed reactions of isocyanates with alcohols should be carried out in inert solvents. Such reactions in the absence of solvents often occur with explosive violence [Wischmeyer 1969].

Health Hazard

Inhalation causes breathlessness, chest discomfort, and reduced pulmonary function; wheezing, cough, and sputum may also occur. Contact with liquid irritates eyes and skin. Ingestion causes irritation of mouth and stomach.