Description

Castor Oil, Polymer With 1,1-Methylenebis[4-Isocyanatobenzene] is a polyurethane prepolymer derived from the reaction of castor oil with MDI (4,4'-diphenylmethane diisocyanate). This specialized polymer combines the renewable, hydrophobic characteristics of castor oil with the robust structural properties of polyurethane, offering a versatile platform for formulating high-performance materials. It is essential for manufacturers seeking bio-based content, enhanced flexibility, and chemical resistance in their end products. Key industries that utilize this polymer include adhesives & sealants, coatings, elastomers, and composite materials.

Application

• Adhesives & Sealants: As a key component in formulating moisture-curing polyurethane adhesives and sealants for construction, automotive, and packaging applications.
• Coatings & Paints: Used in the production of high-performance, flexible, and chemical-resistant coatings for industrial floors, marine environments, and protective linings.
• Elastomers & Castables: Serves as a prepolymer for manufacturing flexible cast polyurethane elastomers, gaskets, and rollers.
• Composite Materials: Acts as a matrix resin or modifier in bio-composites and fiber-reinforced plastics to improve impact resistance and adhesion.
• Footwear & Apparel: Employed in the synthesis of polyurethane soles, midsoles, and waterproof breathable membranes.
• Automotive Components: Used in underbody coatings, sound dampening materials, and interior trim components.
• Flexible Foams: Can be formulated into low-density, flexible polyurethane foams for cushioning applications.
• Binder Systems: Functions as a polymeric binder in foundry sands, abrasives, and other consolidated particulate systems.

Basic Information

Product Name	Castor Oil, Polymer With 1,1-Methylenebis[4-Isocyanatobenzene]
CAS No.	68424-09-9
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Castor Oil-MDI Prepolymer; Castor Oil Polyurethane Prepolymer; MDI-Castor Oil Adduct; Polyurethane Prepolymer from Castor Oil and MDI; 4,4'-MDI Castor Oil Polymer; Castor Oil based Polyisocyanate; Ricinoleic Acid Triglyceride Polymer with Diphenylmethane Diisocyanate; Bio-based Polyurethane Prepolymer
EINECS	Contact for details

Quality Control

Our Castor Oil, Polymer With 1,1-Methylenebis[4-Isocyanatobenzene] is manufactured under a strict quality management system. Each batch undergoes rigorous testing to ensure consistent performance, including analysis of NCO content, viscosity, and moisture levels. Certificates of Analysis (COA) documenting these parameters are available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C / 59-77°F). Due to its hygroscopic (moisture-sensitive) nature, containers must be kept tightly sealed to prevent moisture ingress, which can lead to premature polymerization or gelation. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Viscous liquid, clear to pale yellow
NCO Content	Contact for details
Viscosity @ 25°C	Contact for details
Moisture (Karl Fischer)	< 0.05%
Specific Gravity @ 25°C	Contact for details
Color (Gardner)	< 3

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