Description

Benzene, 1,1-Methylenebisisocyanato-, Homopolymer is a polymeric isocyanate, a high-performance chemical intermediate derived from methylene diphenyl diisocyanate (MDI). This compound is valued for its role in creating durable, cross-linked polymer networks with enhanced thermal and chemical resistance. It is essential for manufacturers in the polyurethane, coatings, and adhesive industries seeking to improve product performance and longevity.

Application

• Polyurethane Elastomers: As a cross-linking agent or chain extender to produce high-performance elastomers with superior mechanical properties.
• Coatings and Paints: A key component in formulating high-solids, two-component polyurethane coatings for industrial, automotive, and marine applications requiring excellent durability and chemical resistance.
• Adhesives and Sealants: Used to enhance the strength, flexibility, and environmental resistance of structural and specialty adhesives.
• Binder Systems: Employed in foundry sands and composite materials as a robust polymeric binder.
• Fiber Treatment: For surface modification and sizing of technical fibers to improve adhesion to polymer matrices.
• Specialty Polymer Synthesis: Serves as a building block for synthesizing advanced polymers with tailored properties for niche industrial applications.

Basic Information

Product Name	Benzene, 1,1-Methylenebisisocyanato-, Homopolymer
CAS No.	39310-05-9
Molecular Formula	(C15H10N2O2)n
Molecular Weight	Polymeric (Variable)
Synonyms	Polymeric MDI (PMDI)
Poly(methylene polyphenylene isocyanate)
MDI Homopolymer
Crude MDI
Polymeric Diphenylmethane Diisocyanate
PMDI
Benzene, 1,1'-methylenebis[4-isocyanato]-, homopolymer
EINECS	Contact for details

Quality Control

Our production of Benzene, 1,1-Methylenebisisocyanato-, Homopolymer adheres to stringent quality management protocols. Each batch undergoes rigorous analytical testing to ensure consistency in key parameters such as isocyanate content, viscosity, and hydrolyzable chlorine. A Certificate of Analysis (COA) detailing these specifications is provided with every shipment to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. This material is hygroscopic (moisture-sensitive). Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep the container tightly sealed under a dry, inert atmosphere (e.g., nitrogen) to prevent moisture ingress and premature polymerization. Isolate from sources of heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Brown viscous liquid
Isocyanate Content (NCO%)	30.0 - 32.0 %
Viscosity (at 25°C)	150 - 250 mPa·s
Hydrolyzable Chlorine	≤ 0.10 %
Acidity (as HCl)	≤ 0.05 %
Specific Gravity (25°C)	1.22 - 1.25

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.